[0001]The present invention is acidic liquid, in particular, relates to a three-piece resealing the can capable of storing acidic beverages such as fruit juice with high quality.
　The present application, on September 29, 2010, in Japanese Patent Application No. 2010-218071, filed in Japan and December 3, 2010, in Japanese Patent Application No. 2010-270183, filed in Japan and December 3, 2010 , priority is claimed on has been a Japanese Patent application No. 2010-270184 filed in Japan, the contents of which are incorporated herein.
Background technique
[0002]
　3-piece resealing the can is mainly composed of a can body member, can bottom member and the cap. Can body member, except for the welded portion, a steel sheet advance PET film is laminated. Rounding the steel plate into a cylindrical shape, a cylindrical can body by electrical resistance welding overlay the welded portion by 0.3 ~ 0.6 mm is produced.
　At the bottom of the can body, flanging is performed, the bottom cover (can bottom member) is attached. On the other hand, the upper portion of the can body, in order to attach the cap, after the neck machining is performed, threaded to enable resealing by the cap is performed. Screw machining, pressing an indenter to rotate the inner and outer surfaces of the can body, is a process to form the shape of the peaks and valleys of the screw in the circumferential direction of the can body, where, in a portion where the indenter is hit, large shearing force is generated in the circumferential direction. Therefore, it laminated films, it is necessary to ensure adhesion to prevent peeling the trunk member (steel plate) by its shear force. Thus the screw machined portions, aluminum cap has been subjected to threaded is tightened up. Also, capped without threaded into the can before threading, pressing the indenter from the top of the cap is also known a method of threading a can body and the cap together (e.g., see Patent Document 1).
[0003]
　Meanwhile, the cylinder member of the conventional three-piece cans, although steel such as tin are preferably used for the part of the Sn alloyed with the melt 溶錫 process (melt process Sn) after plating Sn ( for example, see Patent documents 2 ~ 7), Ni-plated steel sheet not using Sn have also been used (e.g., see Patent Document 8). For acidic beverages such as fruit juice has a relatively high corrosion resistance against an acidic beverages tend to Sn plated steel sheet Sn unalloyed is sacrificial protection against the base iron is used. On the other hand, Ni-plated steel sheet is applied to a relatively corrosive low beverage. Further, Ni plated steel sheet, excellent film adhesion as compared with the Sn-plated steel sheet, in particular, since it has a adhesion at processed portion, are used in high workpiece.
CITATION
Patent Literature
[0004]
Patent Document 1: Japanese Patent 2006-341851 JP
Patent Document 2: Japanese Patent Laid-Open 6-135441 discloses
Patent Document 3: Japanese Patent Laid-Open 6-218462 discloses
Patent Document 4: Japanese Patent 7-156953 JP
Patent Document 5: Japanese Unexamined Japanese Patent Application Laid-Open No. 5-32256
Patent Document 6: Japanese KOKOKU 7-2998 discloses
Patent Document 7: Japanese Kokoku No. 3-49628 Publication
Patent Document 8: Japanese Patent 2000 -80499 No.
Summary of the Invention
Problems that the Invention is to Solve
[0005]
　3-piece resealing the can, when filling the acidic beverage, in view of corrosion resistance, Sn plated steel sheet is optimal to the body member. However, when the threaded has been subjected to the can barrel, a strong shearing force layer of Sn which is not alloyed is deformed by the adhesion between the Sn plating and the film is impaired, tends film wrinkle and film peeling occurs . Further, alloy Sn (Sn alloyed) is excellent in adhesion is insufficient corrosion resistance to acidic beverages. On the other hand, the Ni-plated steel sheet, the above film peeling problems scarcely occur, because the corrosion resistance to acid beverages is insufficient, the function as the can may be reduced. Accordingly, the laminate 3-piece resealing cans acidic beverage can filling are required.
　Under such circumstances, an object of the present invention is excellent in the weldability and film adhesion and corrosion resistance, to provide a three-piece resealing the can capable of storing acidic beverages such as fruit juice with high quality.
Means for Solving the Problems
[0006]
　The present inventors have found that in order to ensure the corrosion resistance, the bottom cover of the laminate 3-piece resealing the can, Sn-plated steel sheet available to sacrificial protection by Sn (e.g., unpainted, no film) using, during processing to ensure the film adhesion, the body material of the can, the polyester film (e.g., PET film) by using a Ni-plated steel sheet comprising, also filled with acidic beverage cans can suppress the progress of corrosion It was heading. Further, Ni plated steel sheet used in the barrel member of the can, when further comprising a Sn-plated at least part of which is alloyed, Sn in the Sn plating has a further effect of suppressing corrosion through the polyester film ing.
　Corrosion within the can rapidly proceed by oxygen mixed in during the filling of the beverage, after the oxygen is consumed gradually proceeds. That is, in the initial stages of corrosion, the oxygen in the reactor is consumed by sacrificial protection of Sn, after the oxygen has been consumed, even lower Ni plating steel sheet relatively corrosion resistance tends to be applied to less-corrosive beverages, the corrosion rate decreases remarkably, practically, has been found to be able to ensure a sufficient life.
[0007]
　The gist of the present invention is as follows.
　(1) acidic 3-piece resealing cans liquid according to an embodiment of the present invention, a cylindrical can body member having a threaded portion at one end and; said to close the opening of the other end of the can barrel member can barrel wherein the can barrel member, a cylindrical first steel plate and; and can bottom member in contact with the member of the can barrel member; said first and Ni plating is formed on the inner peripheral surface of the steel plate a polyester film formed so as to be disposed on the outermost surface of the peripheral; and chromate film formed between the first steel plate and the polyester film; have the amount of the Ni plating, 10 ~ 1000 mg / m 2 a, the amount of the chromate film is, 2 ~ 30 mg / m of a metal Cr terms 2 a, the amount of closest metal plating on the inner periphery of the outermost surface of the can barrel member, 200 ~ 4000 mg / m 2 is the can bottom member, and a second steel plate; the first Two and Sn plating formed on the can barrel member side of the steel plate of; have, the Sn plating, 2 ~ 20 g / m 2 comprising a single metal Sn plating in the amount of.
[0008]
　(2) In the acidic 3-piece resealing cans liquid according to the above (1), the outermost surface of the can barrel member side of the can bottom member, may be the Sn plating.
[0009]
　(3) In the acidic 3-piece resealing cans liquid according to the above (1), the can bottom member further comprises a chromate film formed on the Sn-plated surface, the amount of the chromate film is a metal Cr translated at 2 ~ 10 mg / m 2 is, the outermost surface of the can bottom member, may be the chromate film.
[0010]
　(4) In the above (1) to (3) acidic 3-piece resealing cans liquid according to any one of the Sn plating of the can bottom member, 0.2 ~ 1.5 g / m 2 The amount of alloyed Sn plating may contain.
[0011]
　(5) above (1) in an acidic 3-piece resealing cans liquid according to any one of - (4), the can bottom member is formed on the can barrel member-side surface of the second steel plate 10 ~ 200 mg / m was 2 may further include an amount of Ni plating.
[0012]
　(6) In the above (1) to (5) acidic 3-piece resealing cans liquid according to any one of the can bottom member is formed on the can barrel member-side surface of the second steel plate 10 ~ 200 mg / m was 2 may further include an amount of Ni plating.
[0013]
　(7) In the above (1) acidic liquid for 3 piece resealing can according to any one of - (6), the amount of the Ni plating of the can barrel member, 200 ~ 1000 mg / m 2 are, the the amount of the chromate film of the can barrel member, 2 ~ 10 mg / m of a metal Cr terms 2 may be.
[0014]
　(8) In the above (1) acidic liquid for 3 piece resealing can according to any one of - (6), wherein the can barrel member further comprises a Sn plating formed on the Ni plating surface, the Sn plating, 0.2 ~ 2 g / m 2 comprises a single metal Sn plating, and alloying the Sn plating, the amount of the Ni plating of the can barrel member, 10 ~ 200 mg / m 2 are, the the amount of the chromate film of the can barrel member, 10 ~ 30 mg / m 2 may be.
[0015]
　(9) In the above (1) acidic 3-piece resealing cans liquid according to any one of - (8), wherein the can barrel member, said chromate film, which is formed between the polyester film bonding it may further have an adhesive layer.
[0016]
　(10) The acidic 3-piece resealing cans liquid according to (9), the adhesive layer, the metal Sn particles having an average particle size of 2 ~ 7 [mu] m, 100 ~ of the surface area of said first steel plate 3600 mg / m 2 may be contained.
[0017]
　(11) an acidic 3-piece resealing cans liquid according to the above (10) has an average particle diameter of the metal Sn particles may be 3 ~ 6 [mu] m.
[0018]
　(12) In the above (10) or 3-piece resealing cans acid liquid according to (11), the adhesive layer is, the metal Sn particles, 300 ~ 2000 mg / m of the surface area of said first steel plate 2 may be contained.
[0019]
　(13) In the above (1) to acidic 3-piece resealing cans liquid according to any one of (12), the resistance between the can barrel member and the can bottom member, be not more than 1Ω good.
[0020]
　(14) The acidic 3-piece resealing cans liquid according to (13), the resistance between the can barrel member and the can bottom member may be 0.1Ω or less.
Effect of the invention
[0021]
　According to the present invention, weldability, film adhesion, and excellent corrosion resistance, it is possible to provide a three-piece resealing the can capable of storing acidic beverages such as fruit juice with high quality.
BRIEF DESCRIPTION OF THE DRAWINGS
[0022]
[FIG. 1A] is a schematic longitudinal sectional view of a resealing the can according to an embodiment of the present invention.
Is a schematic view seen from a direction perpendicular to FIG. 1B] plate surface can body member before producing the resealing the can.
It is a schematic perspective view of a can body member after welding the Figure 1C] welds.
It is a schematic longitudinal sectional view of a can body member shown in FIG. 1D] Figure 1C.
[FIG. 1E] is a schematic longitudinal sectional view of a can body member after threading.
It is a schematic longitudinal sectional view showing a can body member immediately after the filling of FIG 1F] acidic liquid.
[Figure 1G] acidic liquid is a schematic longitudinal sectional view showing a resealing cans filled.
Is a cross-sectional view showing an example of a layer structure of a can body member of resealing the can according to FIG. 2A] present embodiment.
Is a cross-sectional view showing an example of a layer structure of a can body member of resealing the can according to FIG. 2B] present embodiment.
It is a cross-sectional view showing an example of a layer structure of a can body member of resealing the can according to FIG. 2C] The present embodiment.
It is a cross-sectional view showing an example of a layer structure of a can body member of FIG. 2D] resealing the can according to the present embodiment.
It is a cross-sectional view showing an example of a layer structure of a can body member of resealing the can according to FIG. 2E] The present embodiment.
It is a cross-sectional view showing an example of a layer structure of a can body member of resealing the can according to FIG. 2F] present embodiment.
Is a cross-sectional view showing an example of the layer structure of the can bottom member of resealing the can according to FIG. 3A] present embodiment.
Is a cross-sectional view showing an example of the layer structure of the can bottom member of resealing the can according to FIG. 3B] present embodiment.
[FIG. 3C] is a cross-sectional view showing an example of the layer structure of the can bottom member of resealing the can according to the present embodiment.
It is a cross-sectional view showing an example of the layer structure of the can bottom member of resealing the can according to FIG. 3D] present embodiment.
Is a cross-sectional view showing an example of the layer structure of FIG. 3E] can bottom member of resealing the can according to the present embodiment.
It is a cross-sectional view showing an example of the layer structure of FIG. 3F] can bottom member of resealing the can according to the present embodiment.
It is a cross-sectional view showing an example of the layer structure of the can bottom member of resealing the can according to FIG. 3G] present embodiment.
Is a cross-sectional view showing an example of the layer structure of FIG. 3H] can bottom member of resealing the can according to the present embodiment.
[FIG 4A] is a cross-sectional view showing an example of the layer structure of the can bottom member of resealing the can according to the present embodiment.
Is a cross-sectional view showing an example of the layer structure of the can bottom member of resealing the can according to FIG. 4B] present embodiment.
5 is a sectional view showing an example of the layer structure in the welded portion of the can body member of resealing the can according to the present embodiment.
DESCRIPTION OF THE INVENTION
[0023]
　The following describes in detail embodiments of the present invention.
　Method for producing a plated original plate used in the embodiment (steel plate) are not particularly limited and material, usually steel strips (normal refining, steel strip passing through the casting) are hot rolling, pickling, cold rolling , be plated are manufactured through annealing, temper rolling and the like of the process.
　[Ni-plated steel sheet (can body members)
　will be described first can body member in the case of using the Ni-plated steel sheet.
　Above be plated, when performing Ni plating, typically, degreasing as a pretreatment in order to clean the surface of the plating original plate, but the pickling is carried out, these methods are not particularly limited. For example, after the plating original plate was degreased with 10% sodium hydroxide, it may be performed electrolyte pickling with 5% sulfuric acid solution. Degreasing, continue to pickling, electrical Ni plating is performed on the plated original plate. No particular limitation on the method of Ni plating. For example, using a sulfuric Ni and boric acid, 30 ~ 45 ° C. containing Ni ions 20 ~ 40 g / L, at pH4 about solution, current density 1 ~ 5A / dm 2 may perform Ni plating. The purpose of plating the Ni is weldability, is ensuring corrosion resistance and processability adhesion. Ni has a solid phase bonding liable characteristics by forge welding, it is possible to exhibit excellent weldability by Ni plating. The solid improvement of weldability by bonding, Ni plating weight of 200 mg / m 2 begins to take at least, improves gradually weldability in accordance with an increase in the Ni coating weight. However, Ni plating weight of 1000 mg / m 2 by weight, the improvement effect is economically disadvantageous saturated. Therefore, in the case of obtaining the effect of improving the weldability by solid-phase bonding, Ni plating weight 200 ~ 1000 mg / m 2 is preferably.
[0024]
　Further, Ni exhibits more excellent processability adhesion in synergy with chromate conversion coating. Film formed by chromate treatment (chromate film) is a film by hydrogen bonding (e.g., polyester film) mainly comprising the hydrated oxide Cr which firmly adhered to. The excellent adhesion, the amount of chromate film is 2 mg / m reckoned as metal chromium 2 begins to be exerted is equal to or more than, with increasing chromate coating amount is increased gradually adhesion. On the other hand, the chromate film are the insulative than the metal plating, the amount of chromate film is too large, required welding current becomes unstable, become scattered due to local heat generation is likely to occur. Therefore, the amount of chromate film, 30 mg / m reckoned as metal chromium 2 must be less than or equal to, 10 mg / m 2 is preferably not more than. In particular, in this Ni-plated steel sheet, since the direct chromate film is formed on the Ni plating surface, in consideration of affinity, etc. between the Ni plating and chromate coating, a chromate coating 2 ~ 10 mg / m 2 is preferably . Method of applying the chromate film is not particularly limited. For example, Cr acid 100 g / L, in a solution of sulfuric acid 1 g / L, 1 ~ 5A / dm 2 can be obtained chromate film by cathodic electrolysis at a current density of.
[0025]
　[Sn plated steel sheet (can bottom member)
　Next, the can bottom member will be described using the Sn-plated steel sheet.
　Even when performing Sn plating, as with Ni plating, degreasing as a pretreatment in order to clean the surface of the plating original plate, but the pickling is carried out, these methods are not particularly limited. For example, after the plating original plate was degreased with 10% sodium hydroxide, it may be performed electrolyte pickling with 5% sulfuric acid solution. Degreasing, continue to pickling, electrically Sn plating is performed on the plated original plate. No particular limitation on the method of Sn-plated. For example, by using the sulfate Sn sulfate, Sakueki the pH1 approximately acid solution containing Sn ions 15 ~ 30g / L, 30 ~ 45 ℃, current density 1 ~ 5A / dm 2 when performing Sn plating good.
[0026]
　The purpose of using Sn-plated steel sheet can bottom member is secured corrosion resistance. The acidic beverage in a container (acid liquid) is filled, Sn is sacrificial protection against base steel. In particular, immediately after filling, i.e., in the initial stages of corrosion, oxygen and Sn in cans promote corrosion by reacting, corrosion resistance is ensured. Improved corrosion resistance due to the Sn is a single metal Sn coating weight in the Sn plating 2 g / m 2 begins to take the above, gently increased according to the increase of the Sn plated amount. However, the single metal Sn plating weight of 20 g / m 2 by weight, the improvement effect is economically disadvantageous saturated. Thus, a single metal Sn plating amount, 2 ~ 20 g / m 2 is limited to. Furthermore sufficient corrosion resistance (e.g., a longer period corrosion resistance in a) in order to ensure the single metal Sn plating weight, 5 g / m 2 is preferably at least, 8 g / m 2 and more preferably at least . Also, if efficiently utilized as possible Sn plating, single metal Sn plating weight, 16g / m 2 is preferably not more than, 15 g / m 2 and more preferably less. Incidentally, defined as Sn plating is not alloyed is subjected to single-metal Sn plating after Sn plating, single metal Sn plating amount is evaluated as the amount independently of the alloying Sn coating weight of less. Therefore, it may include other elements resulting from the plating bath into the single metal Sn plating.
[0027]
　The Sn plating layer immediately after plating is performed (Sn plating), there are microscopic pinholes invisible, there is a case where base steel is exposed. Therefore, by performing the melt溶錫processed after Sn plating, to eliminate pinholes, it is possible to improve the corrosion resistance. In addition, in this case, since the Sn alloy layer excellent in corrosion resistance as compared with pure Sn (alloyed Sn plating) is formed, Sn (Sn in the single metal Sn plating) are eluted by sacrificial protection action, Sn to prevent corrosion of the portion where the plating layer becomes thinner, it is possible to suppress the elution of iron (the base steel). Improved corrosion resistance due to the Sn alloy layer is alloyed Sn plating weight of 0.2 g / m of a metal Sn terms 2 begins to take the above, gently increased according to the increase of the alloying Sn coating weight. However, alloying Sn plating weight of 1.5 g / m of a metal Sn terms 2 exceeds, the improvement effect is economically disadvantageous saturated. Therefore, alloying Sn plating amount, 0.2 ~ 1.5 g / m of a metal Sn terms 2 is preferably. The method of melt溶錫treatment is not particularly limited, may be used a device capable of heating to a temperature above the melting point of Sn, for example, it is carried out melt溶錫treatment by heating in electric heating and induction heating or electric furnace it can. Note that this alloyed Sn coating weight is evaluated as the amount independent of the single metal Sn plating amount.
[0028]
　Also, the Sn plated steel sheet used for can bottom member may be carried out Ni plating before performing Sn plating. In this case, Sn plating is formed on the Ni plating, the appearance of the alloying Sn plating can be silver-white. Usually, Sn alloy, to form a rough surface of the columnar crystal, has the appearance of gray or black. However, the alloying Sn plating is formed on the Ni plating, crystal Sn alloy finer and in order to more precisely deposit is considered that appearance is silver-white. Effect appearance improved by the Ni is, Ni plating weight of 10 mg / m 2 begins to take the above, gently increase with increasing Ni plating amount. However, Ni plating weight of 200 mg / m 2 by weight, the improvement effect is economically disadvantageous saturated. Therefore, when performing Ni plating on the can bottom member, Ni plating weight of 10 ~ 200 mg / m 2 is preferably. The method of the Ni plating is not particularly limited. For example, may be used a method of the above Ni plating, it may be formed of Ni-Fe alloy plating of Ni plating. Ni-Fe alloy plating, for example, in using a sulfate Fe sulfate Ni and boric acid, 30 ~ 45 ° C. containing Ni and Fe ion of 20 ~ 40g / L, pH2 ~ 3 approximately in the solution, current density 1 ~ 5A / dm 2 can be formed by performing plating at.
[0029]
　Following Sn plating, chromate treatment may be performed for the adhesion securing such coating. Surface corresponding to the can inner surface of the Sn plated steel sheet is preferably used as it can bottom member without performing chromate treatment. However, the surfaces corresponding to the can outer surface of the Sn plated steel sheet, to ensure the corrosion resistance (rust resistance) and slip resistance, easy coating is applied. Therefore, the surface corresponding to the can outer surface of the Sn plated steel sheet, it is preferable to form a chromate film to improve coatability. That is, the film formed by chromate treatment (chromate film) mainly comprising the hydrated oxide Cr firmly adhere to the coating material by hydrogen bonding. The excellent adhesion, the amount of chromate film is 2 mg / m reckoned as metal chromium 2 begins to be exerted is equal to or more than, with increasing chromate coating amount is increased gradually adhesion. However, the chromate film is 10 mg / m 2 by weight, the improvement effect is economically disadvantageous saturated. Therefore, the amount of chromate film, 2 ~ 10 mg / m reckoned as metal chromium 2 is preferably at most. Further, if the amount chromate film is within this range, it is possible to chromate film on a surface corresponding to the can inner surface of the can bottom member be formed and maintained Sn corrosion resistance improvement effect of the (sacrificial anticorrosion effect) sufficiently . Therefore, it may be formed the chromate film on both surfaces of the Sn plated steel sheet. In this case, it is possible to perform the chromate treatment easily. A method of imparting the chromate film is not particularly limited. For example, in dichromate sodium 40 g / L, pH 4 in the solution, 1 ~ 5A / dm 2 can be obtained chromate film by performing cathodic electrolysis at a current density of.
[0030]
　[Sn plated steel sheet (can body member)
　further explained barrel member using the Sn-plated steel sheet.
　The Sn-plated steel sheet used for can body members, it is necessary to perform Ni plating before Sn plating. The method of the Ni plating is not particularly limited. For example, may be used a method of the above Ni plating, it may be formed of Ni-Fe alloy plating of Ni plating. Ni-Fe alloy plating, for example, in using a sulfate Fe sulfate Ni and boric acid, 30 ~ 45 ° C. containing Ni and Fe ion of 20 ~ 40g / L, pH2 ~ 3 approximately in the solution, current density 1 ~ 5A / dm 2 can be formed by performing plating at.
[0031]
　The purpose of plating the Ni before Sn plating is ensuring corrosion resistance and adhesion. Since Ni is a metal having excellent corrosion resistance, it is possible to improve the corrosion resistance of the Sn alloy layer containing Ni to produce a molten溶錫treatment (alloying Sn plating). Further, when plating the Ni before Sn plating, easily repelled the Sn melted at melting溶錫process, increases the exposure of the alloy Sn layer excellent in film adhesion, the exposure amount of Sn unalloyed since smaller, it is possible to ensure the film adhesion in the processing unit. The effect of these Ni is, Ni plating weight of 10 mg / m 2 begins to take the above, gently increase with increasing Ni plating amount. However, Ni plating weight of 200 mg / m 2 by weight, the improvement effect is economically disadvantageous saturated. Thus, Ni plating amount, 10 ~ 200 mg / m 2 is preferably.
[0032]
　Role of Sn of the Sn-plated steel sheet used for can body member is secured weldability. Since Sn has an effect of lowering the contact resistance, it is possible to easily perform the electric resistance welding relative to Sn-plated steel sheet. Improvement of weldability by Sn is a single metal plating of the Sn plating 0.2 g / m 2 begins to take at least, moderately weldability is improved with the increase of the single metal Sn plating amount. The single metal Sn plating weight of 2 g / m 2 by mass or less, the effect of the above-mentioned Ni plating, it is possible to secure a sufficient exposure amount of alloying Sn plating after melt溶錫described below, it is possible to improve the film adhesion. Therefore, in the case of obtaining the effect of improving the weldability due to a decrease in contact resistance is a single metal Sn plating weight of 0.2 ~ 2 g / m 2 is preferably. Incidentally, the single metal Sn plating amount is evaluated as the amount independently of the alloying Sn coating weight of less.
[0033]
　Furthermore, in order to ensure the adhesion, melt溶錫processing as described above is performed. In this melt溶錫process, alloying Sn plating amount of generated 0.2 g / m of a metal Sn terms 2 becomes more than the adhesion (film adhesion) begins to improve, increasing alloying Sn coating weight depending improves slowly adhesiveness. However, when alloyed Sn coating weight increases excessively, hard Sn alloy layer becomes difficult to follow the working of threading, etc., damage such as cracking Sn alloy layer is produced, adhesion and corrosion resistance are remarkably deteriorated Sometimes. Therefore, alloying Sn plating weight, 2 g / m of a metal Sn terms 2 is preferably not more than, 1 g / m 2 and more preferably less. Thus, alloyed Sn plating amount, 0.2 ~ 2 g / m 2 is preferably. Alloyed Sn coating weight can be controlled by adjusting the temperature and time at the time of melting溶錫process. The method of melt溶錫treatment is not particularly limited, Industrially, it is possible to perform melt溶錫treatment by heating in electric heating and induction heating or electric furnace. Note that this alloyed Sn coating weight is evaluated as the amount independent of the single metal Sn plating amount.
[0034]
　Following Sn plating, chromate treatment is carried out in order to secure excellent film adhesion during processing (processing adhesion). Film formed by chromate treatment (chromate film) mainly comprising the hydrated oxide of Cr strongly adhere to the film by hydrogen bonding and a metal Cr. The excellent processing adhesion, the amount of chromate film is 2 mg / m reckoned as metal chromium 2 begins to be exerted is equal to or more than, with increasing chromate coating amount is increased gradually adhesion. On the other hand, the chromate film are the insulative than the metal plating, the amount of chromate film is too large, required welding current becomes unstable, become scattered due to local heat generation is likely to occur. Therefore, the amount of chromate film, 30 mg / m reckoned as metal chromium 2 should be less than or equal to. In particular, in this Sn plated steel sheet, since the direct chromate film is formed on the Sn-plated surface, in consideration of affinity, etc. between the Sn plating and chromate coating, a chromate coating 10 ~ 30 mg / m 2 is preferably . Method of applying the chromate film is not particularly limited. For example, Cr acid 100 g / L, in a solution of sulfuric acid 1 g / L, 10 ~ 40A / dm 2 can be obtained chromate film by cathodic electrolysis at a current density of.
[0035]
　Ni plated steel sheet for the above can wall member, using a Sn-plated steel sheet for any and can bottom member of the Sn-plated steel sheet for the can barrel member, three-piece resealing the can is manufactured. For the manufacturing method of the three-piece resealing the can is not particularly limited. For example, it may be used the method described in Patent Document 1.
[0036]
　In the present embodiment, as Sn plated steel sheet which constitutes the bottom cover, to use a Sn-plated steel sheet that are not organic coating on the surface corresponding to at least the inner surface of the can. The organic coating is defined as a general coating film (organic coating film) or a laminate resin film used in the can body. That is, in this embodiment, with respect to the defect portion of the can body, because at least the portion in contact with the contents of the can inner surface of the bottom lid to utilize sacrificial protection by Sn plating that are not organic coating, an organic to surface coating it is required to use a Sn-plated steel sheet but not formed.
[0037]
　Further, in order to further enhance the adhesion between the polyester film and the chromate film, and a chromate coating (on the chromate coating of the can body member) between the polyester film may be formed an adhesive layer. The adhesive resin used in the adhesive layer is not particularly restricted as long as it is a bonding agent that is commonly used to laminate the resin film to the steel sheet. The adhesive resin, a thermoplastic resin, but any thermosetting resin can be used, it is preferred to use a thermosetting resin in view of heat resistance.
　For example, the thermosetting resin, polyester, urethane, epoxy, acrylic, amino-based, at least one or a melamine resin to at least one of these resins is selected from the resins of phenol, etc., such as isocyanate resin like composition obtained by adding a curing agent it can be used.
　Further, the adhesive layer, it is also possible to add a white pigment, an inorganic pigment such as titanium oxide or mica may contain 20 to 80 wt%.
[0038]
　As the polyester film (polyester film) to be used for a can body member, although films such as polyethylene naphthalate or polyethylene terephthalate (PET) can be used, among others film composed mainly of polyethylene terephthalate (PET film) is preferably used It is. The polyester film, in order to ensure dimensional stability against heat treatment, the biaxially stretched film is usually used. While not being limited for the thickness of the film, 8 films having a thickness of about ~ 250 [mu] m can be used, for example, economy, handling property, be suitably used a film having a thickness of 12 ~ 25 [mu] m from the viewpoint of processability can.
[0039]
　The present inventors, as shown above, the bottom cover of the laminate 3-piece resealing the can, it was found that the corrosion resistance of the can body can be ensured by using a Sn-plated steel sheet available to sacrificial protection due to Sn. Furthermore, the present inventors, as shown below, the body material of the can, using the Ni-plated steel sheet, after securing the film adhesion during processing, between the can bottom and the can body of the can body It found that it is critical to be made smaller in the resistance to suppress corrosion of the can body after filling the acidic liquid.
[0040]
　Another point of the present embodiment, in the can body, the resistance between the bottom cover (can bottom member) and can body (can body member) is small is (e.g., 1 [Omega less). In general, from the viewpoint of preventing corrosion caused by dissimilar metal contact, it is thought to be desirable to increase the resistance between the bottom lid and the can body. However, in acidic 3-piece resealing cans liquid of the present embodiment, since the sacrificial corrosion protection can body tin plating can bottom, it is preferable that the resistance between the bottom lid and the can barrel, or less 1Ω , and more preferably 0.1Ω or less.
　Thus, the resistance is not more than 1Ω the between the bottom lid and the can barrel, can form cells between the Ni or Fe of the bottom lid Sn and the can barrel, a sacrificial anticorrosion effect of Sn is sufficiently exhibited, It was found to be suppressed corrosion of the can barrel portion.
[0041]
　How to reduce the resistance between the can lid and can body is not particularly limited. In the present embodiment, the surface of the can lid, which corresponds to the inner surface of the can body, without using the organic film except sealing compound applied to the fastening part wound in order to ensure the sealing performance. Therefore, for example, as a method of lowering the resistance, the organic film of the portion of the can body which can bottom member is in contact with the can lid of a portion other than the sealing compound applied portion when tightened around the can body members, mechanical, physical manner or the like is chemically process for removing.
　Further, for example, a method of further applying the sealing compound only inward (inside the normal position) of the sealing panel (can bottom member). Furthermore, for example, when the shearing blanking the can barrel member, shearing burrs at the can end side of the can body member tightening up the can lid there is also a method of shearing to exit the can outer surface direction. In this case, since the metal portion and the can bottom member of the burr is likely to contact, without removing the organic film of the can barrel outer surface, it can secure conduction between the can body member and the can bottom member .
[0042]
　Furthermore, the present inventors, as described below, by incorporating a specific proportion of the metal Sn particles of a particular particle size in the adhesive layer in between Ni plated steel sheet and a polyester film (polyester film), while ensuring the film adhesion during processing, it was found to be able to suppress the progress of corrosion after filling of acidic beverages. That is, when using metal Sn particles can body member, in the initial stages of corrosion, the oxygen in the reactor is consumed by the oxygen and the metal Sn particles in the reactor are reacted, after the oxygen is consumed, the low even easy Ni-plated steel sheet is applied to a corrosive beverages, the corrosion rate decreases remarkably, practically, has been found to be able to ensure a sufficient film adhesion and the can life. In this case, the sacrificial protection due to Sn of the can bottom member, it is possible to obtain both effects of the sacrificial by Sn of the adhesive layer in the can barrel member, it is possible to realize a long-term corrosion resistance of the can body.
[0043]
　Still another point of the present embodiment, the adhesive layer of the surface corresponding to at least the can inner surface of the can for a resin film laminated steel plate (Ni-plated steel sheet) is preferably 2 ~ 7 [mu] m, and more preferably an average particle of 3 ~ 6 [mu] m 100 ~ 3600 mg / m, preferably per surface area of the steel sheet metal Sn particles having a diameter 2 , more preferably 300 ~ 2000 mg / m 2 is to include.
[0044]
　First, describe the benefits of incorporating the metal Sn particles in the adhesive layer.
　In an environment in the reactor filled with acidic beverage, tin (Sn) is baser than iron (Fe) or nickel (Ni), is oxidized earlier than the nickel and iron. Immediately after filling, i.e., in the initial stages of corrosion, the oxygen in the reactor to promote corrosion. The oxygen in the can by reacting with the metal Sn particles, it is possible to delay the corrosion of subsequent steel, corrosion resistance is ensured. Incidentally, plated with Sn only on the steel sheet, when using the Sn-plated steel sheet not subjected to alloying can body member, the processing unit (threaded portion) such as a screw as described above in the film peeling occurred It's easy to do.
[0045]
　Next, the reason why it is preferable that the average particle diameter of the metal Sn particles is 2 ~ 7 [mu] m.
　The average particle size is less than 2μm metal Sn particles, appearance becomes tendency becomes strong dark, when the appearance of the can body surface is required, it is preferable that the average particle diameter of the metal Sn particles is 2μm or more. Incidentally, lowering of the brightness of this appearance is thought to be the effect of an increase in the number of scattering times of light with increasing number of particles. Further, the 7μm than the average particle diameter of the metal Sn particles, in the adhesive layer of the degree average thickness 5μm or less, when increasing the only size of the metal Sn particles without changing the thickness of the adhesive layer, the adhesive interface the air is caught, between the adhesive layer and the steel plate (Ni-plated steel plate), or between the adhesive layer and the resin film (polyester film), it becomes difficult to ensure a sufficient adhesion. Further, in this case, the metal Sn particles themselves are deformed during processing, for example, adhesion threaded portion tends to decrease. Therefore, the average particle diameter of the metal Sn particles is preferably 2 ~ 7 [mu] m, and more preferably 3 ~ 6 [mu] m.
　The average particle diameter of the metal Sn particles used in the present embodiment is a value measured by a laser light scattering diffraction particle size distribution analyzer (manufactured by Shimadzu Corporation SALD-2000J).
[0046]
　Then, the amount of metal Sn particles contained in the adhesive layer, the surface area per 100 ~ 3600 mg / m of the steel plate 2 the reason why it is preferable that.
　Amounts steel surface area per 100 mg / m of metallic Sn particles 2 as long as above, it is possible to enhance further the corrosion resistance of the can body member. Further, the surface area per 3600 mg / m amount of the steel sheet of the metal Sn particles 2 below, it is possible to keep bright the color tone of the coating film (polyester film and the adhesive layer), the appearance of the inner surface of the can is good. Further, in this case, it is possible to sufficiently secure the film adhesion threaded portion.
　Accordingly, the amount of metal Sn particles contained in the adhesive layer, the surface area per 100 ~ 3600 mg / m of the steel plate 2 is preferably, 300 ~ 2000 mg / m 2 is more preferable.
[0047]
　Furthermore, the acidic liquid for 3 piece resealing can of the present embodiment (hereinafter, referred to as resealing can) the configuration of the further described with reference to the accompanying drawings.
　In Figure 1A, it shows a schematic longitudinal sectional view of a resealing can of the present embodiment. As shown in FIG. 1A, resealing the can 1 of this embodiment includes a barrel member 2 cylindrical having a threaded portion (threaded portion) 21 at one end, closing the opening of the other end of the barrel member 2 as it provided with the can bottom member 3 in contact with the can body member 2, a cap 4 screwed with the screw portion 21 of the can body member 2. As described above, the end portions of the can bottom member 3 of the can body members 2, wound up by sealing the lower of resealing the can 1, to form a can body 5. Similarly, the cap 4 is screwed to the can body member 2, and seal the top of resealing the can 1 so as to be resealing.
　The shape of resealing the can 1 may be satisfied the above-described configuration, not limited to the shape shown in FIG. 1A. The material of the cap 4, but is typically aluminum is used, as long as it does not impair the effects of the present embodiment, any material (e.g., the same material as the can body member 2) can be used.
[0048]
　Further, in FIG. 1B ~ Figure 1G, the production method of the can body of the present embodiment is shown schematically for. As shown in FIG. 1B, can body member 2 of the previous preparation of resealing the can 1 is a plate-like, when viewed from a direction perpendicular to the plate surface, has a weld 22, and a polyester film 23 there. The weld 22 is formed along the two sides facing the plate surface of the can body member 2, the surface of the welded portion 22 is not formed organic film such as a polyester film 23. Molding a plate-shaped can body member 2 into a tubular shape, by welding the welding portions 22 for example superimposed by electric resistance welding, 1C and 1D (vertical cross-sectional view of FIG. 1C) are shown as a tubular it can be obtained can body member 2. Furthermore, this cylindrical can body member 2, thread processing is given, the threaded portion 21 as shown in FIG. 1E is formed. The cap 4 attached to the screw portion 21, as shown in FIG. 1F, acidic liquid 100 from the opening of the end opposite the threaded portion 21 is end formed in the can body member 2 (e.g., acidic beverages ) to fill the. After filling of the acidic liquid 100, as shown in FIG. 1G, tighten winding an end portion of the can body member 2 to close the opening (the end portion on the opening side) and the end portion of the can bottom member 3, the acidic resealing the can 1 the liquid 100 is filled is produced. Incidentally, acidic liquid 100 is not particularly limited, and may be an acidic beverages such as orange juice.
[0049]
　In resealing the can 1 of the present embodiment, for example, it can be used plated steel sheet having a layer structure as shown in FIGS. 2A ~ Figure 2F the can body member 2. These figures 2A ~ Figure 2F schematically shows an area A surrounded by a broken line in Figure 1A. Note that this layer arrangement is only to be applied to the inner surface of at least the can body 5 may be applied to both surfaces of the can body 5 (the inner and outer surfaces). As shown in FIGS. 2A ~ Figure 2F, can body member 2, a cylindrical steel plate (the first steel plate, be plated) and 26, the Ni plating 25 formed on the inner peripheral surface of the steel sheet 26, can body includes a polyester film 23 formed so as to be disposed on the inner periphery of the outermost surface of the member 2, the polyester film 23 and the steel plate 26 (or, Ni plating 25) and a chromate film 24 formed between the ing. As described above, the amount of Ni plating 25 of the can body member 2, 10 ~ 1000 mg / m 2 a, the amount of chromate film 24, 2 ~ 30 mg / m of a metal Cr terms 2 is. Further, in order to ensure weldability, the closest metal plating (FIG. 2A ~ Figure 2F to the inner periphery of the outermost surface of the can barrel member, Ni plating 25 or Sn plating 27 (i.e., a single metal Sn plating 27A and alloying Sn the amount of the plating 27B)) is, 200 ~ 4000 mg / m 2 is required to be.
[0050]
　Further, FIGS. 2A, 2C and 2E show an example of a Ni-plated steel sheet for a can body member described above. In Figure 2A, can body member 2A is, a steel plate 26, a Ni plating 25 formed on the surface of the steel sheet 26, the chromate film 24 formed on the surface of the Ni plating 25 on the surface of the chromate film 24 and a polyester film 23 formed. In Figure 2C, the can barrel member 2C is a steel plate 26, a Ni plating 25 formed on the surface of the steel sheet 26, the chromate film 24 formed on the surface of the Ni plating 25 on the surface of the chromate film 24 and formed adhesive layer 28, and a polyester film 23 formed on the surface of the adhesive layer 28. In the can body members 2E in FIG. 2E, adhesive layer 28 in the same layer structure and FIG. 2C, which contain a metal Sn particles 28A.
[0051]
　Similarly, 2B, 2D and 2F show an example of the Sn-plated steel sheet for a can bottom member of the above. These FIG. 2B, FIG. 2D and FIG. 2F, and further has a Sn plating 27 formed on the surface of the Ni plating 25. In Figure 2B, the can barrel member 2B is a steel plate 26, a Ni plating 25 formed on the surface of the steel sheet 26, the Sn plating 27 formed on the surface of the Ni plating 25 on the surface of the Sn plating 27 a chromate film 24 formed, and a polyester film 23 formed on the surface of the chromate film 24. In Figure 2D, the can barrel member 2D is a steel plate 26, a Ni plating 25 formed on the surface of the steel sheet 26, the Sn plating 27 formed on the surface of the Ni plating 25 on the surface of the Sn plating 27 a chromate film 24 formed, and includes an adhesive layer 28 formed on the surface of the chromate film 24, a polyester film 23 formed on the surface of the adhesive layer 28. In the can body members 2E in FIG. 2E, adhesive layer 28 in the same layer configuration as FIG. 2D, contains a metal Sn particles 28A. These FIG. 2B, FIG. 2D, FIG. 2F, Sn plating 27 is alloyed, and a single metallic Sn plating 27A alloyed Sn plating 27B.
[0052]
　Note that the weld 22 of the can body member 2 is not formed a polyester film 23. Accordingly, if the layer structure a layer structure of a non-welded portion of the can body member 2 is shown in Figure 2A, the layer structure of the weld portion 22 is a layer structure as shown in FIG. Incidentally, FIG. 5 schematically shows a longitudinal section of the welded portion 22 (region D) corresponding to the region A surrounded by a broken line in Figure 1A.
[0053]
　In resealing the can 1 of the present embodiment, for example, can be used plated steel sheet having a layer structure as shown in FIGS. 3A ~ Figure 3H to the can bottom member 3. These figures 3A ~ FIG 3H schematically shows an area B surrounded by a broken line in FIG. 1A. Note that this layer arrangement is only to be applied to the inner surface of at least the can body 5 may be applied to both surfaces of the can body 5 (the inner and outer surfaces). As shown in FIGS. 3A ~ Figure 3H, can bottom member 3, the steel plate (the second steel sheet, be plated) and 36, formed in the can body member 2 side of the steel plate 36 (inner surface side of the can body 5) and a Sn plating 37. As described above, Sn plating 27 of the can bottom member 3, 2 ~ 20 g / m 2 and includes a single metal Sn plating in the amount of.
[0054]
　Further, FIGS. 3A ~ FIG 3H shows an example of the Sn-plated steel sheet for a can bottom member of the above. In Figure 3A, can bottom member 3A is provided with a steel plate 36, and a Sn plating 37 formed on the surface of the steel plate 36. In Figure 3B, can bottom member 3B is provided with a steel plate 36, the Sn plating 37 formed on the surface of the steel sheet 36, and a chromate film 34 formed on the surface of the Sn plating 37. Similarly, in FIG. 3C, can bottom member 3C is a steel plate 36, and a Sn plating 37 formed on the surface of the steel sheet 36, and a chromate film 34 formed on the surface of the Sn plating 37. In Figure 3D, the can bottom member 3D is provided with a steel plate 36, a Ni plating 35 formed on the surface of the steel sheet 36, and a Sn plating 37 formed on the surface of the Ni plating 35. In Figure 3E, the can bottom member 3E is a steel plate 36, a Ni plating 35 formed on the surface of the steel sheet 36, the Sn plating 37 formed on the surface of the Ni plating 35 on the surface of the Sn plating 37 and a chromate film 34 formed. Similarly, in FIG. 3F, can bottom member 3F is a steel plate 36, a Ni plating 35 formed on the surface of the steel sheet 36, the Sn plating 37 formed on the surface of the Ni plating 35, the Sn-plated 37 and a chromate film 34 formed on the surface of the. In Figure 3G, can bottom member 3G is provided with a steel plate 36, and a Sn plating 37 formed on the surface of the steel plate 36. In Figure 3H, the can bottom member 3H is provided with a steel plate 36, a Ni plating 35 formed on the surface of the steel sheet 36, and a Sn plating 37 formed on the surface of the Ni plating 35.
[0055]
　Here, FIG. 3A, FIG. 3D, FIG. 3G and FIG. 3H, the top-surface of the can body member 2 of the can bottom member 3, a Sn plating 37, 3B, 3C, FIG. 3E and FIG. 3F, the outermost surface of the can body member 2 of the can bottom member 3 is a chromate film 34. Further, in FIG. 3D ~ FIG. 3F and 3H, the can bottom member 3 has a Ni plating 35 formed on the can body member 2 side of the surface of the steel plate 36. Further, FIGS. 3A, 3B, FIG. 3D and FIG. 3E, Sn plating 37 includes only a single metal Sn plating 37A. Further, FIG. 3C, FIG. 3F, FIG. 3G and FIG. 3H, Sn plating 37 includes both a single metal Sn plating 37A alloyed Sn plating.
[0056]
　As described above, the chromate film 34 is formed in order to improve the outer surface of the coating of the can body 5, in order to perform the chromate treatment easily, for example, as shown in the can bottom member 3I of FIG. 4A to, it may form a chromate film 34 on both sides of the can bottom member 3. In order to effectively exhibit as possible sacrificial protection effect of Sn plating 37, for example, as shown in the can bottom member 3J in FIG. 4B, may be formed chromate film 34 only on the outer surface of the can body 5. It should be noted that these FIGS. 4A and 4B, for example, schematically shows the region C surrounded by a broken line in Figure 1A.
[0057]
　In the present embodiment, it is possible to can body 5, to produce various combinations of barrel member 2 and the can bottom member 3 of above. Further, by appropriately controlling or selecting a processing method or the like upon tightening winding a can body member 2 and the can bottom member 3, the resistance between the can body member 2 and the can bottom member 3, the control as described above it may be. The resistance of the case, for example, across the tightening position, the resistance between the metal surfaces can body member 2 (Plating or be plated) and the can bottom member 3 of the metal surface (Plating or be plated) it may be measured.
[0058]
　In the present embodiment, for example, as follows, by controlling the order of the amount and lamination of the layers (each plating and coating), it is possible to provide a suitable can body as a container for filling the acidic liquid.
The can bottom of the decorated cans body (A) threaded, one surface 2 ~ 15 g / m the Sn plating 2 subjected the unpainted, using steel free film, the can body, the Ni plating on one side 200 ~ 1000 mg / m 2 applied, then, 2 ~ 10 mg / m of chromate film of metal Cr terms 2 subjected further provides acid 3-piece resealing cans for liquids using a steel sheet laminated with PET film.
(B) in the can bottom of the threaded a decorated with can body, 2 ~ 15 g / m to Sn plating on one surface 2 subjected, then, 2 ~ 10 mg / m in the chromate film metal Cr terms 2 unpainted subjected, no using the steel sheet of the film, the can body, 200 ~ 1000 mg / m Ni plating on one surface 2 subjected, then, 2 ~ 10 mg / m of chromate film of metal Cr terms 2 steel plates subjected, further laminated with a PET film providing acidic 3-piece resealing cans liquid using.
The can bottom of (C) threaded to decorated with can body, one surface 2 ~ 15 g / m the Sn plating 2 subjected the unpainted, using steel free film, the can body, the Ni plating on one side 10 ~ 200 mg / m 2 applied, then the Sn plating 0.2 ~ 2 g / m 2 applied, melting溶錫after processing Sn perform alloyed, 10 ~ 30 mg / m of chromate film of metal Cr terms 2 subjected further provides a three-piece resealing cans acidic liquid used steel plate laminated with PET film.
(D) in the can bottom of the threaded a decorated with can body, 2 ~ 15 g / m to Sn plating on one surface 2 subjected, then, a chromate film 2 ~ 10 mg / m of a metal Cr terms 2 unpainted subjected, no using the steel sheet of the film, the can body, one side 10 ~ 200 mg / m Ni plating 2 subjected, then, the Sn plating 0.2 ~ 2 g / m 2 applied, alloying of Sn was melt溶錫process after the chromate film 10 ~ 30 mg / m of a metal Cr terms 2 subjected further provides acid 3-piece resealing cans for liquids using a steel sheet laminated with PET film.
For Sn-plated steel sheet used for can bottom according to any one of (E) (A) ~ ( D), after Sn plating, was melt溶錫treatment, 0.2 g / m 2 ~ 1.5 g / m 2 of Sn provides a three-piece resealing cans acidic liquid alloyed.
(F) for Sn-plated steel sheet used for can bottom according to any one of (A) ~ (E), Sn prior to plating, to 10 Ni plating on one side 200 mg / m 2 subjected acidic liquid for 3 to provide a piece resealing cans.
[0059]
　Further, for example, in the present embodiment, as described below, to control the resistance between the can lid and the can body, it is possible to provide a more suitable can body.
　(G) Ni sided per 200 ~ 1000 mg / m 2 , then, the chromate film 2 ~ 10 mg / m of a metal Cr terms 2 and plating, laminating a polyester film via an adhesive layer on a surface corresponding to at least the inner surface of the can a can body subjected to threaded on Ni-plated steel sheet obtained by, per side 5 ~ 20 g / m of Sn 2 , then the chromate film 2 ~ 10 mg / m of a metal Cr terms 2 and plating, the contents of at least the inner surface of the can a portion in contact with the object in the can body comprising a bottom cover made of Sn-plated steel sheet that is not an organic coating, to provide an acidic 3-piece resealing cans liquid resistance is less 1Ω between the can body and the bottom cover.
　In three-piece resealing the can according to (H) above (G), Sn bottom cover made of plated steel sheet, per side 8 ~ 16g / m The Sn 2 , then, 2 ~ 10 mg / m of chromate film of metal Cr terms 2 providing three-piece resealing cans acid liquid formed by plating.
　In three-piece resealing the can according to (I) above (H), to provide an acidic 3-piece resealing cans liquid resistance is less 0.1Ω between can body and the bottom lid.
[0060]
　Further, for example, in the present embodiment, as described below, contain a metal Sn particles in the adhesive layer, it is possible to provide a more suitable can body. That,
　(J) per side 200 ~ 1000 mg / m of Ni 2 , then the chromate film 2 ~ 10 mg / m of a metal Cr terms 2 and plating, a polyester film via an adhesive layer on a surface corresponding to at least the inner surface of the can in can body having a can body subjected to thread cutting a steel sheet obtained by laminating an average particle size of 100 per surface area of the steel sheet metal Sn particles 2 ~ 7μm ~ 3600mg / m in the adhesive layer 2 containing providing three-piece resealing cans acidic liquid.
　(K) In the three-piece resealing the can according to the above (J), the average particle diameter of the metal Sn particles, provides a three-piece resealing cans acidic liquid is a 3 ~ 6 [mu] m.
　In three-piece resealing the can according to (L) above (J) or (K), the surface area per 300 ~ 2000 mg / m of steel sheet metal Sn particles 2 to provide an acidic 3-piece resealing cans containing liquid.
Example
[0061]
　Hereinafter, a more detailed explanation of the present invention through examples, the present invention is not limited to the following Examples unless changing the gist thereof.
[0062]
　First, were used in the following examples, Ni-plated steel sheet (mainly barrel member) and the preparation of, for the preparation of the Sn-plated steel sheet (for barrel member and for can bottom member) will be described.
[0063]
　(Preparation method 1) after the cold rolling, on both sides of the annealing, temper rolled 0.19mm thick be plated (steel plate), using a sulfuric Ni and boric acid, 45 ° C. containing Ni ions 40 g / L, in pH4 in solution, the current density of 1A / dm 2 was applied to Ni plating. Subsequently, with respect to both surfaces of the steel sheet, Cr acid 100 g / L, in a solution of 45 ° C. sulfuric acid 1 g / L, 5A / dm 2 to produce a Ni-plated steel sheet subjected to chromate treatment by cathodic electrolysis at a current density of . The Ni-plated steel sheet, vertical 110 mm, sheared into dimensions of horizontal 170 mm, with the exception of the vertical side near to become welded portion, and laminating the PET film having a thickness of 15μm which has been biaxially stretched to both sides of the plate, the can to prepare a Ni-plated steel sheet for the body member.
[0064]
　(Preparation method 2) after cold rolling, annealing, on both sides of the temper rolled 0.19mm thick it is plated (steel plate), using a sulfuric Ni sulfate Fe and boric acid, of 40 g / L Ni ions and 20g / L 45 ° C. containing the Fe ions, in a solution of pH 2.5, current density 10A / dm 2 was applied to Ni plating. Subsequently, to prepare a Sn plating solution pH1.1 containing Sn ions 20 g / L using a sulfuric Sn and sulfuric acid, on both sides of the steel plate, 45 ° C., 2A / dm 2 and Sn plating applied in molten performing a溶錫treatment and chromate treatment to prepare a Sn-plated steel sheet. In melt溶錫treatment was cooled at 60 ° C. water immediately after heating to about 245 ° C. energization heating method. In chromate treatment, Cr acid 100 g / L, in a solution of sulfuric acid 1 g / L, 20A / dm 2 was carried out cathode electrolysis at a current density of. The Sn-plated steel sheet, vertical 110 mm, sheared into dimensions of horizontal 170 mm, with the exception of the vertical side near to become welded portion, and laminating the PET film having a thickness of 15μm which has been biaxially stretched to both sides of the plate, the can to prepare a Sn-plated steel sheet for cylinder member.
[0065]
　(Preparation method 3) after the cold rolling, on both sides of the annealing, temper rolled 0.19mm thick be plated (steel plate), with sulfuric acid Ni, 45 ° C. containing Ni ions 40 g / L, pH 4 in the solution in current density 1A / dm 2 was applied to Ni plating. Subsequently, to prepare a Sn plating solution pH1.1 containing Sn ions 20 g / L using a sulfuric Sn and sulfuric acid, on both sides of the steel plate, 45 ° C., 2A / dm 2 and Sn plating applied in molten performing a溶錫treatment and chromate treatment to prepare a Sn-plated steel sheet. In melt溶錫treatment was cooled at 60 ° C. water immediately after heating to about 245 ° C. energization heating method. In chromate treatment, Cr acid 100 g / L, in a solution of sulfuric acid 1 g / L, 20A / dm 2 was carried out cathode electrolysis at a current density of. The Sn-plated steel sheet, vertical 110 mm, sheared into dimensions of horizontal 170 mm, with the exception of the vertical side near to become welded portion, and laminating the PET film having a thickness of 15μm which has been biaxially stretched to both sides of the plate, the can to prepare a Sn-plated steel sheet for cylinder member.
[0066]
　Further, the Sn-plated steel sheet for can bottom member was prepared in the following manner.
[0067]
　(Preparation method 4) after the cold rolling, on both sides of the annealing, temper rolled 0.19mm thick be plated (steel plate), pH 1 containing Sn ions of the produced 20 g / L using a sulfuric Sn and sulfuric acid in Sn plating solution of .1, 45 ° C., 2A / dm 2 grant Sn plating, if necessary, by performing a melting溶錫treatment and chromate treatment to prepare a Sn-plated steel sheet. In melt溶錫treatment was cooled at 60 ° C. water immediately after heating to about 245 ° C. energization heating method. In chromate treatment, with dichromate sodium 40 g / L, pH 4 in the solution, 3A / dm 2 was carried out cathode electrolysis at a current density of.
[0068]
　(Procedure 5) After the cold rolling, annealing, on both sides of the temper rolled 0.19mm thick be plated (steel plate), after applying the Ni plating under the same conditions as (Process 2), and sulfuric Sn and sulfuric acid in Sn plating solution of pH1.1 containing Sn ions of the produced 20 g / L using, 45 ° C., 2A / dm 2 and Sn plating granted, if necessary, melt溶錫treatment and chromate treatment It went the door, to prepare a Sn-plated steel sheet. In melt溶錫treatment was cooled at 60 ° C. water immediately after heating to about 245 ° C. energization heating method. In chromate treatment, with dichromate sodium 40 g / L, pH 4 in the solution, 3A / dm 2 was carried out cathode electrolysis at a current density of.
[0069]
　(Preparation 6) after the cold rolling, annealing, on both sides of the temper rolled 0.19mm thick be plated (steel plate), after applying the Ni plating under the same conditions as (Process 3), and sulfuric Sn and sulfuric acid in Sn plating solution of pH1.1 containing Sn ions of the produced 20 g / L using, 45 ° C., 2A / dm 2 and Sn plating granted, if necessary, melt溶錫treatment and chromate treatment It went the door, to prepare a Sn-plated steel sheet. In melt溶錫treatment was cooled at 60 ° C. water immediately after heating to about 245 ° C. energization heating method. In chromate treatment, with dichromate sodium 40 g / L, pH 4 in the solution, 3A / dm 2 was carried out cathode electrolysis at a current density of.
[0070]
　The steel sheet produced by the process 1-6 above were applied to the can body member and the can bottom member in the combinations shown in Table 1. Incidentally, by adjusting the conditions of the processing time and the like in each process 1 ~ 6, No. The amount of each of 1 ~ 25 (Ni plating amount, the single metal Sn plating amount, alloying Sn coating weight, chromate coating weight) was adjusted. Of the layers, Ni plating amount and chromate coating amount (provided that the metal Cr equivalent amount) relative to evaluated the respective metal Ni amount and the metal Cr content by ICP (inductively coupled plasma) spectrometry. Further, for the single metal Sn plating amount and alloyed Sn coating weight was evaluated Sn amount by SEM-EDX (scanning electron microscope supplied energy dispersive X-ray spectroscopy). Incidentally, the alloying Sn plating, determined in a region Fe and Ni is detected during Sn plating, a single metal Sn plating, Fe and Ni were determined in a region not detected during Sn plating.
[0071]
　Hereinafter, the evaluation method will be described. It should be noted, No. in Table 1 About 1 to 25, the following evaluation items (1) to (4) were evaluated.

(1) Weldability
　The prepared various PET resin film laminated steel plate (steel sheet for a can body member), using a Sudoronikku's welder was welded at a welding speed of 550Cpm. In this welding, was set overlapping margin of the weld 0.4 mm, the pressure in 45DaN. Weldability is comprehensive evaluation of the breadth and weld nugget continuity of the proper current range, four stages (A: very good, B: Good, C: poor, D: unweldable) was evaluated in. Here, it consists proper current range, when performing welding by changing the welding current, the maximum current value that weld defects begins conspicuous such as sufficient welding minimum current value strength can be obtained and dust and welding spatter current it is in the range.
[0072]
(2) Film adhesion threaded portion
　of the upper portion of the can body after welding while rotating the cylindrical two indenter having grooves 1mm intervals 150rpm sandwiched between two indenter, 1mm height 1mm intervals It was performed of the screw processing with a peak-to-valley to the can body. Thereafter, 125 ° C., retorted for 30 minutes, 4 stages the release status of the film of threaded portion (A: absolutely no peeling after threading and retorting, B: retorting after practical use without peeling after processing There is no negligible peel, C: There minor peeling after processing, D: was assessed in the majority in there peeling) after processing.
[0073]
(3) corrosion resistance
　can body subjected to thread cutting of the capped with aluminum cap (screw portion) filled with commercially available 100% orange juice (acidic beverage), the can lid against the can body seamed, the cans were produced. After the can 6 months storage at 30 ° C. and the contents were taken out and observed corrosion condition of the inner surface of the can with measuring the iron leaching amount. Corrosion situation is visually observed around the threaded portion, the corrosion resistance, four stages (A: not observed at all corrosion threaded portion and the flat plate portion, B: it is observed practically no problem slight corrosion threaded portion but corrosion on the flat plate portion is not observed at all, C: micro corrosion threaded portion and the flat portion is observed, D: evaluation in severe corrosion on the threaded portion was observed, corrosion is observed in the flat plate portion) did. Also, the appearance of the alloy layer exposed to the can bottom (can lid) (can bottom appearance after the test) was also observed.
[0074]
　(4) Paint adhesion can bottom member (paint adhesion of the outer surface of the can bottom)
　to Sn-plated steel sheet for can bottom member, the epoxy-phenol resin was coated, perform 200 ° C., the baking of 30min, then It was subjected to cover processing for use as a can bottom member. Perform tape peeling test with respect to curling portion and countersink processing unit by the lid processing was evaluated for peeling situation.
　Also, the Sn plated steel sheet after baking the epoxy phenolic resin, put the depth of the lattice-shaped scribe of at 1mm intervals reach the base steel (steel), the tape peeling test in the scribe section, peeling and assess the situation.
　Comprehensively evaluate the results of these tape peeling test, paint adhesion, four stages (A: absolutely no peeling, B: practically there negligible peel no problem, C: Slight peeling, D: large It was evaluated by peeling) in part.
[0075]
　As shown in Table 1, satisfying the conditions of the present invention No. In 1-19, weldability, film adhesion, and had excellent corrosion resistance. On the other hand, it does not satisfy the conditions of the present invention No. In 20-25, weldability, film adhesion, any of the corrosion resistance was inferior. It should be noted that, in Table 1 No. In 25, the same PET film as the can barrel member using also the Ni-plated steel sheet which is laminated against the can bottom member. The No. In 25, the working portion and the flat plate portion such as a screw portion is corroded spot, iron elution there were many. Further, in the cross-section observation of corrosion locations, perforation corrosion proceeds, especially in the severe corrosion locations, be perforated corrosion up to about 4/5 of the thickness is in progress was confirmed. On the other hand, a sufficient Sn-plated steel sheet Sn plated amount when used in the can bottom (can bottom member), the corrosion was not observed almost at locations corrosion is found, the amount of perforation corrosion , is a minor, was about 1/10 of the plate thickness at the maximum. Moreover, No. of chromate film is applied to the can bottom member Paint adhesion 2,4,6,8,10,12,14,16 to 19, the chromate film to the can bottom member is not subjected No. It was higher than the paint adhesion 1,3,5,7,9,11,13,15. Therefore, in the case of applying a coating to the can bottom, the surface (i.e., acidic liquid surface not in contact with the outer surface of the can body) for applying paint to the can bottom member can bottom member can be suitably used with a chromate film in There has been confirmed.
[0076]
　As shown in the above embodiment, 3-piece resealing the can according to the present invention, weldability, film adhesion, and excellent corrosion resistance, it has become clear that can store acidic liquid (acidic beverage) in high quality.
[0077]
[Table 1]

[0078]
　Furthermore, in order to further improve the corrosion resistance of the can barrel member, to produce a can body with varying resistance between the can body member and the can bottom member. For example, in order to reduce the resistance between the can body member and the can bottom member, following No. At 25 to 43 was varied material factor in the amount or the like of each layer of the structural factors or barrel member and the can bottom member, such as a method of attaching the can bottom member to a can body member.
[0079]
　No. Ni-plated steel sheet used for can body member 25 was fabricated in the following manner (corresponding to the above-mentioned Production Method 1). After cold rolling, annealing, on both sides of the temper rolled 0.19mm thick be plated (steel plate), using a sulfuric Ni and boric acid, 45 ° C. containing Ni ions 40 g / L, pH 4 in the solution in current density 1A / dm 2 was applied to Ni plating. Subsequently, with respect to both surfaces of the steel sheet, Cr acid 100 g / L, in a solution of 45 ° C. sulfuric acid 1 g / L, 5A / dm 2 to produce a Ni-plated steel sheet subjected to chromate treatment by cathodic electrolysis at a current density of . Ni deposition amount (Ni plating amount), 500 mg / m 2 a, the amount of chromate film, 5 mg / m reckoned as metal chromium 2 was.
　No. Sn-plated steel sheet used in 25 of the can bottom member (bottom lid) was prepared by the following method (corresponding to the above process (4)). After cold rolling, annealing, on both sides of the temper rolled 0.19mm thick be plated (steel plate), Sn of pH1.1 containing Sn ions of the produced 20 g / L using a sulfuric Sn and sulfuric acid in the plating solution, 45 ° C., 2A / dm 2 and Sn plating granted by performing a melting溶錫treatment and chromate treatment to prepare a Sn-plated steel sheet. In melt溶錫treatment was cooled at 60 ° C. water immediately after heating to about 245 ° C. energization heating method. In chromate treatment, with dichromate sodium 40 g / L, pH 4 in the solution, 3A / dm 2 was carried out cathode electrolysis at a current density of. Sn adhesion amount (metallic Sn plating weight), 11.2 g / m 2 is the amount of chromate film, 5 mg / m reckoned as metal chromium 2 it was.
　It was sheared the Ni-plated steel sheet to the dimensions of width 170 mm. Then, the sheared Ni-plated steel sheet was heated to 180 ° C., with the exception of the vertical side near to become welded portion, PET film having a thickness of 12μm with an adhesive layer (polyester resin film) is thermally bonded to the both surfaces of the plate Te, to prepare a Ni-plated steel sheet PET resin film is laminated. Furthermore, it was sheared into dimensions of the Ni-plated steel sheet length 110 mm (vertical dimension in the width direction). At this time, sheared as burrs on the side tightening up the bottom lid of the Ni-plated steel sheet (the side to be a can end, plate end) becomes the can outer surface direction.
[0080]
　No. The 26 steel materials (barrel member and the can bottom member), with the exception of the processing method of one of the can end (end face machining method) No. Ni-plated steel sheet was produced in the same manner as 25 and No. Using the same Sn-plated steel sheet and 25. That is, for the end face processing method of the can body member, formed on the outer surface of the side tightening up the bottom lid of the Ni-plated steel sheet PET resin film is laminated with a dimension of length 110mm and width 170 mm (the side to be the can end) was mechanically removed by a grinder only 1mm width from PET resin film and the adhesive layer plate end which is.
[0081]
　The No, 27 steel materials (barrel member and the can bottom member), with the exception of the processing method of one of the can end (end face machining method) No. Using the prepared Ni-plated steel sheet and the Sn-plated steel sheet in the same manner as 25. That is, for the end face processing method of the can body member, formed on the outer surface of the side tightening up the bottom lid of the Ni-plated steel sheet PET resin film is laminated with a dimension of length 110mm and width 170 mm (the side to be the can end) the PET resin film and the adhesive layer is evaporated removed only laser light 0.5mm width from the plate edge.
[0082]
　No. The 28 steel materials (barrel member and the can bottom member), with the exception of the processing method of one of the can end (end face machining method) No. 25 and with the exception of (the same Ni-plated steel sheet No.27) and Sn coating weight Ni plated steel sheet was produced in the same manner No. Using Sn-plated steel sheet was produced in the same manner as 25. That is, the can bottom member, Sn adhesion amount (metallic Sn plating weight), 5.6 g / m 2 is the amount of chromate film, 5 mg / m reckoned as metal chromium 2 was. Also, the end face processing method of the can body member, formed on the outer surface of the side tightening up the bottom lid of the Ni-plated steel sheet PET resin film is laminated with a dimension of length 110mm and width 170 mm (the side to be the can end) the PET resin film and the adhesive layer is evaporated removed only laser light 0.5mm width from the plate edge.
[0083]
　No. The 29 steel materials (barrel member and the can bottom member), with the exception of the processing method of one of the can end (end face machining method) No. 25 and with the exception of (the same Ni-plated steel sheet No.27) and Sn coating weight Ni plated steel sheet was produced in the same manner No. Using Sn-plated steel sheet was produced in the same manner as 25. That is, the can bottom member, Sn adhesion amount (metallic Sn plating weight), 15.1 g / m 2 is the amount of chromate film, 5 mg / m reckoned as metal chromium 2 was. Also, the end face processing method of the can body member, formed on the outer surface of the side tightening up the bottom lid of the Ni-plated steel sheet PET resin film is laminated with a dimension of length 110mm and width 170 mm (the side to be the can end) the PET resin film and the adhesive layer is evaporated removed only laser light 0.5mm width from the plate edge.
[0084]
　No. The 30 steel materials (barrel member and the can bottom member), with the exception of the processing method of one of the can end (end face machining method) No. 25 and with the exception of (the same Ni-plated steel sheet No.26) and Sn coating weight Ni plated steel sheet was produced in the same manner No. Using Sn-plated steel sheet was produced in the same manner as 25. That is, the can bottom member, Sn adhesion amount (metallic Sn plating weight), 8.4 g / m 2 is the amount of chromate film, 5 mg / m reckoned as metal chromium 2 was. Also, the end face processing method of the can body member, formed on the outer surface of the side tightening up the bottom lid of the Ni-plated steel sheet PET resin film is laminated with a dimension of length 110mm and width 170 mm (the side to be the can end) was mechanically removed by a grinder only 1mm width from PET resin film and the adhesive layer plate end which is.
[0085]
　No. The 31 steel materials (barrel member and the can bottom member), with the exception of the processing method of one of the can end (end face machining method) No. 25 and with the exception of the amount of (the same Ni-plated steel sheet No.27) and chromate film Ni-plated steel sheet was produced in the same manner No. Using Sn-plated steel sheet was produced in the same manner as 25. That is, the can bottom member, Sn adhesion amount (metallic Sn plating weight), 11.2 g / m 2 is the amount of chromate film, 3 mg / m reckoned as metal chromium 2 was. Also, the end face processing method of the can body member, formed on the outer surface of the side tightening up the bottom lid of the Ni-plated steel sheet PET resin film is laminated with a dimension of length 110mm and width 170 mm (the side to be the can end) the PET resin film and the adhesive layer is evaporated removed only laser light 0.5mm width from the plate edge.
[0086]
　No. The 32 steel materials (barrel member and the can bottom member), with the exception of the processing method of one of the can end (end face machining method) No. 25 and with the exception of the amount of (the same Ni-plated steel sheet No.26) and chromate film Ni-plated steel sheet was produced in the same manner No. Using Sn-plated steel sheet was produced in the same manner as 25. That is, the can bottom member, Sn adhesion amount (metallic Sn plating weight), 11.2 g / m 2 is the amount of chromate film, 8 mg / m reckoned as metal chromium 2 was. Also, the end face processing method of the can body member, formed on the outer surface of the side tightening up the bottom lid of the Ni-plated steel sheet PET resin film is laminated with a dimension of length 110mm and width 170 mm (the side to be the can end) was mechanically removed by a grinder only 1mm width from PET resin film and the adhesive layer plate end which is.
[0087]
　No. The 33 steel materials (barrel member and the can bottom member), with the exception of the processing method of the Ni deposition amount and one of the can end (end face machining method) No. 25 Ni-plated steel sheet was produced in the same manner as and No. Using the same Sn-plated steel sheet and 25. That is, the can barrel member, Ni deposition amount (Ni plating amount), 260 mg / m 2 a, the amount of chromate film, 5 mg / m reckoned as metal chromium 2 was. Also, the end face processing method of the can body member, formed on the outer surface of the side tightening up the bottom lid of the Ni-plated steel sheet PET resin film is laminated with a dimension of length 110mm and width 170 mm (the side to be the can end) the PET resin film and the adhesive layer is evaporated removed only laser light 0.5mm width from the plate edge.
[0088]
　No. The 34 steel materials (barrel member and the can bottom member), with the exception of the processing method of the Ni deposition amount and one of the can end (end face machining method) No. 25 Ni-plated steel sheet was produced in the same manner as and No. Using the same Sn-plated steel sheet and 25. That is, the can barrel member, Ni deposition amount (Ni plating amount), 950 mg / m 2 a, the amount of chromate film, 5 mg / m reckoned as metal chromium 2 was. Also, the end face processing method of the can body member, formed on the outer surface of the side tightening up the bottom lid of the Ni-plated steel sheet PET resin film is laminated with a dimension of length 110mm and width 170 mm (the side to be the can end) was mechanically removed by a grinder only 1mm width from PET resin film and the adhesive layer plate end which is.
[0089]
　No. The 35 steel materials (barrel member and the can bottom member), with the exception of the method of processing amount and one of the can end of chromate film (end face machining method) No. 25 Ni-plated steel sheet was produced in the same manner as and No. Using the same Sn-plated steel sheet and 25. That is, the can barrel member, Ni deposition amount (Ni plating amount), 500 mg / m 2 a, the amount of chromate film, 3 mg / m reckoned as metal chromium 2 was. Also, the end face processing method of the can body member, formed on the outer surface of the side tightening up the bottom lid of the Ni-plated steel sheet PET resin film is laminated with a dimension of length 110mm and width 170 mm (the side to be the can end) the PET resin film and the adhesive layer is evaporated removed only laser light 0.5mm width from the plate edge.
[0090]
　No. The 36 steel materials (barrel member and the can bottom member), with the exception of the method of processing amount and one of the can end of chromate film (end face machining method) No. 25 Ni-plated steel sheet was produced in the same manner as and No. Using the same Sn-plated steel sheet and 25. That is, the can barrel member, Ni deposition amount (Ni plating amount), 500 mg / m 2 a, the amount of chromate film, 8 mg / m reckoned as metal chromium 2 was. Also, the end face processing method of the can body member, formed on the outer surface of the side tightening up the bottom lid of the Ni-plated steel sheet PET resin film is laminated with a dimension of length 110mm and width 170 mm (the side to be the can end) was mechanically removed by a grinder only 1mm width from PET resin film and the adhesive layer plate end which is.
[0091]
　No. The 37 steel materials (barrel member and the can bottom member), with the exception of the processing method of one of the can end (end face machining method) No. Ni-plated steel sheet was produced in the same manner as 25 and No. Using the same Sn-plated steel sheet and 25. That is, for the end face processing method of the can body member (the side that becomes the can end, plate end) side tightening up the bottom lid of the Ni-plated steel sheet PET resin film is laminated with a dimension of length 110mm and width 170mm of burr was sheared so as to can inner direction.
[0092]
　No. The 38 steel materials (barrel member and the can bottom member), with the exception of the processing method of one of the can end (end face machining method) No. 25 and with the exception of (the same Ni-plated steel sheet No.26) and Sn coating weight Ni plated steel sheet was produced in the same manner No. Using Sn-plated steel sheet was produced in the same manner as 25. That is, the can bottom member, Sn adhesion amount (metallic Sn plating weight), 4.7 g / m 2 is the amount of chromate film, 5 mg / m reckoned as metal chromium 2 was. Also, the end face processing method of the can body member, formed on the outer surface of the side tightening up the bottom lid of the Ni-plated steel sheet PET resin film is laminated with a dimension of length 110mm and width 170 mm (the side to be the can end) was mechanically removed by a grinder only 1mm width from PET resin film and the adhesive layer plate end which is.
[0093]
　No. The 39 steel materials (barrel member and the can bottom member), with the exception of the processing method of one of the can end (end face machining method) No. 25 and with the exception of the amount of (the same Ni-plated steel sheet No.26) and chromate film Ni-plated steel sheet was produced in the same manner No. Using Sn-plated steel sheet was produced in the same manner as 25. That is, the can bottom member, Sn adhesion amount (metallic Sn plating weight), 11.2 g / m 2 is the amount of chromate film, 1 mg / m reckoned as metal chromium 2 was. Also, the end face processing method of the can body member, formed on the outer surface of the side tightening up the bottom lid of the Ni-plated steel sheet PET resin film is laminated with a dimension of length 110mm and width 170 mm (the can to become the side) was mechanically removed by a grinder only 1mm width from PET resin film and the adhesive layer plate end which is.
[0094]
　No. The 40 steel materials (barrel member and the can bottom member), with the exception of the processing method of one of the can end (end face machining method) No. 25 and with the exception of the amount of (the same Ni-plated steel sheet No.26) and chromate film Ni-plated steel sheet was produced in the same manner No. Using Sn-plated steel sheet was produced in the same manner as 25. That is, the can bottom member, Sn adhesion amount (metallic Sn plating weight), 11.2 g / m 2 is the amount of chromate film, 12 mg / m reckoned as metal chromium 2 was. Also, the end face processing method of the can body member, formed on the outer surface of the side tightening up the bottom lid of the Ni-plated steel sheet PET resin film is laminated with a dimension of length 110mm and width 170 mm (the side to be the can end) was mechanically removed by a grinder only 1mm width from PET resin film and the adhesive layer plate end which is.
[0095]
　No. The 41 steel materials (barrel member and the can bottom member), with the exception of the processing method of the Ni deposition amount and one of the can end (end face machining method) No. Ni-plated steel sheet was produced in the same manner as 25 and No. Using the same Sn-plated steel sheet and 25. That is, the can barrel member, Ni deposition amount (Ni plating amount), 150 mg / m 2 a, the amount of chromate film, 5 mg / m reckoned as metal chromium 2 was. Also, the end face processing method of the can body member, formed on the outer surface of the side tightening up the bottom lid of the Ni-plated steel sheet PET resin film is laminated with a dimension of length 110mm and width 170 mm (the side to be the can end) was mechanically removed by a grinder only 1mm width from PET resin film and the adhesive layer plate end which is.
[0096]
　No. The 42 steel materials (barrel member and the can bottom member), with the exception of the method of processing amount and one of the can end of chromate film (end face machining method) No. Ni-plated steel sheet was produced in the same manner as 25 and No. Using the same Sn-plated steel sheet and 25. That is, the can barrel member, Ni deposition amount (Ni plating amount), 500 mg / m 2 a, the amount of chromate film, 1 mg / m reckoned as metal chromium 2 was. Also, the end face processing method of the can body member, formed on the outer surface of the side tightening up the bottom lid of the Ni-plated steel sheet PET resin film is laminated with a dimension of length 110mm and width 170 mm (the side to be the can end) was mechanically removed by a grinder only 1mm width from PET resin film and the adhesive layer plate end which is.
[0097]
　No. The 43 steel materials (barrel member and the can bottom member), with the exception of the method of processing amount and one of the can end of chromate film (end face machining method) No. Ni-plated steel sheet was produced in the same manner as 25 and No. Using the same Sn-plated steel sheet and 25. That is, the can barrel member, Ni deposition amount (Ni plating amount), 500 mg / m 2 a, the amount of chromate film, 12 mg / m reckoned as metal chromium 2 was. Also, the end face processing method of the can body member, formed on the outer surface of the side tightening up the bottom lid of the Ni-plated steel sheet PET resin film is laminated with a dimension of length 110mm and width 170 mm (the side to be the can end) was mechanically removed by a grinder only 1mm width from PET resin film and the adhesive layer plate end which is.
[0098]
　Of the above-mentioned No. At 25 to 43 similarly to the above evaluation items (1), (in this case, Ni-plated steel sheet) can barrel member was evaluated weldability using Sudoronikku's welder respect. Then, similarly to the evaluation item (2), the threaded into one of the can end of the tubular can body member, were evaluated film adhesion processing unit. Further, similarly to the evaluation item (3), it can end was threaded and capped with aluminum cap (can body threaded portion of the member), the commercially available can body with the aluminum cap It was filled with 100 percent orange juice (acidic beverages). Thereafter, to prepare a can bottom member is subjected to lid processed into the Sn-plated steel sheet, wound up the can bottom member to another of the can end of the can body (opening) were corrosion resistance evaluation. Incidentally, as the evaluation of the corrosion resistance of the evaluation item (3) it was also evaluated long-term corrosion resistance of the can bottom member. That is, after the above-described corrosion resistance test, observing the corrosion state of the can bottom, the corrosion resistance of the can bottom, four stages (A: not observed at all corrosion, B: practically no problem slight corrosion is observed, C : is observed a minute corrosion, D: was evaluated by the severe corrosion is found).
[0099]
　In Table 2 of the No. In 25-43, in addition to the above (evaluation item (1) to (3)), the following evaluation items (5) were evaluated.
(5) resistance measurement
　can bottom to a can body (can body members) (bottom lid, can bottom member) after tightening up the organic coating on the outer surface of the can bottom and a can body (PET resin film and the adhesive layer) and chromate film was mechanically removed, and the resistance was measured.
[0100]
　The evaluation results can manufacturing conditions (metal Sn coating weight, Ni plating amount, chromate coating amount) in conjunction with Table 2 shows. It should be noted that the overall evaluation for the above evaluation items (1) to (3) (as determined by the lowest evaluation) was also carried out.
[0101]
　As shown in Table 2, No. The can body 25-36, both weldability, appearance, film adhesion threaded portion, corrosion resistance (filiform rust resistance) was sufficient. In addition, No. The can body 37-40 and 43, both weldability, appearance, film adhesion threaded portion, corrosion resistance (filiform rust resistance) was level no practical problem.
　However, No. The can body 25-36, the resistance value between the can body and the can bottom is No. Smaller than the can body 37, the corrosion resistance of the can body No. It was higher than the can body 37. In addition, No. The can body 26, 27, and 29 to 36, the resistance value between the can body and the can bottom No. Smaller than the can body 25, the corrosion resistance of the can body is No. It was higher than the can body 25.
　In addition, No. The can body 25 ~ 36, Sn basis weight of the can bottom member (metal Sn plating weight) No. 38 for more than the can body, the corrosion resistance of the can body No. 38 was higher than the can body. In addition, No. The can body 26, 27, and 29 ~ 36, Sn basis weight of the can bottom member (metal Sn plating weight) No. For more than the can body 28, the corrosion resistance of the can body No. 28 was higher than the can body.
　In addition, No. In the can body of 26,27,29 ~ 36, No. Compared to the can body 39,40,42,43, since the more optimally control the chromate coating amount of the can bottom member and the can barrel member, prolonged corrosion resistance of the can bottom member, the corrosion resistance of the can barrel member, the film adhesion , either weldability was more improved.
　No. The can body 41, for plating the metal of the weld portion of the can body member is not sufficient, the welding of the can body member is not sufficient. No. The 42 can body, for chromate coating of a can body member is not sufficient, the film adhesion threaded portion of the can body member is not sufficient.
[0102]
[Table 2]

[0103]
　In addition, in order to further improve the corrosion resistance of the can barrel member, in Table 3 No. To produce a can body having an adhesive layer containing Sn metal particles on the can body members as shown in 44-63.
[0104]
　In addition, No. The composition of the polyester resin film used 44 to 63 are as follows.
Polyester resin A film: 98 wt% polyethylene terephthalate, polyethylene terephthalate - mixture (film A in Table 3) with polytetramethylene glycol ether block copolymer 2 wt%
polyester resin B film: 95 wt% polyethylene terephthalate, poly - (ethylene glycol - neopentyl glycol - cyclohexanedimethanol) a mixture of ester copolymer 5% by weight (film in Table 3 B)
a polyester resin C film: 90 wt% polyethylene terephthalate, polyethylene terephthalate - polyethylene glycol ether random copolymer (PEG (polyethylene glycol) content 2 mol%) mixture of 10% by weight (film in Table 3 C)
　Further, No. 44 The adhesive (adhesive layer) used in the ~ 63, a thermoplastic resin polyester polyester is a thermosetting resin (adhesive resin I in Table 3) - epoxy, blocked isocyanate curing agent (Table 3 the adhesive resin II) and in the use.
[0105]
　No. Polyester resin film and the adhesive layer used in the can body member 44 was fabricated in the following manner. The thickness 12μm of the polyester resin A film thermoplastic resin containing a dispersed metal Sn particles having an average particle diameter of 2.4μm to one side of a (polyester resin) was dried after coating, to prepare a polyester resin A film 1. Sn particle amount is 1500 mg / m 2 is an average coating film thickness of 5 points as an adhesive layer was 5 [mu] m. Further, thermosetting resin on one surface of the polyester resin A film having a thickness of 12μm without metal Sn particles (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating were prepared polyester resin A film 0. The average coating thickness of 5 points as an adhesive layer was 5 [mu] m.
　No. Ni-plated steel sheet used for can body member 44 was fabricated in the following manner (corresponding to the above-mentioned Production Method 1). After cold rolling, annealing, on both sides of the temper rolled 0.19mm thick be plated (steel plate), using a sulfuric Ni and boric acid, 45 ° C. containing Ni ions 40 g / L, pH 4 in the solution in current density 1A / dm 2 was applied to Ni plating. Subsequently, with respect to both surfaces of the steel sheet, Cr acid 100 g / L, in a solution of 45 ° C. sulfuric acid 1 g / L, 5A / dm 2 to produce a Ni-plated steel sheet subjected to chromate treatment by cathodic electrolysis at a current density of . Ni deposition amount (Ni plating amount), 500 mg / m 2 a, the amount of chromate film, 5 mg / m of a metal Cr terms 2 was.
　The Ni-plated steel sheet, vertical 110 mm, sheared into dimensions of horizontal 170 mm, after heating to 180 ° C., with the exception of the vertical side near to become welded portion, the polyester resin A film 1 on one side, a polyester resin other one side the a film 0 by thermocompression bonding so that the adhesive agent layer adjoin the steel sheet surface, to prepare a Ni-plated steel sheet for a can body member (resin film laminated steel plate 1).
[0106]
　No. Polyester resin film and the adhesive layer used in the can body member 45 was fabricated in the following manner. Thickness 12μm of the polyester resin A film one surface to an average particle diameter 6.6μm of metal Sn particles a thermosetting resin in which is dispersed in (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating the polyester resin A film 2 was produced. Sn particle amount is 1500 mg / m 2 is an average coating film thickness of 5 points as an adhesive layer was 5 [mu] m. Further, thermosetting resin on one surface of the polyester resin A film having a thickness of 12μm without metal Sn particles (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating were prepared polyester resin A film 0. The average coating thickness of 5 points as an adhesive layer was 5 [mu] m.
　No. The 45 steel materials (barrel member and the can bottom member), No. Using the same Ni-plated steel sheet and 44. That, Ni deposition amount (Ni plating amount), 500 mg / m 2 a, the amount of chromate film, 5 mg / m of a metal Cr terms 2 was.
　Vertical 110 mm, after the steel sheet material having dimensions transverse 170mm and heated to 180 ° C., thermal as polyester resin A film 2, adhesive layer of polyester resin A film 0 other one side adjoin the steel sheet surface on one side by crimping, to prepare a Ni-plated steel sheet for a can body member (resin film laminated steel plate 2).
[0107]
　No. Polyester resin film and the adhesive layer used in the can body member 46 was fabricated in the following manner. Thickness 12μm of the polyester resin A film one surface to an average particle diameter 3.5μm of metal Sn particles a thermosetting resin in which is dispersed in (polyester - epoxy resin, blocked isocyanate curing agent) The dried after coating, the polyester resin A film 3 was produced. Sn particle amount is 1500 mg / m 2 is an average coating film thickness of 5 points as an adhesive layer was 5 [mu] m. Further, thermosetting resin on one surface of a PET film having a thickness of 20μm without metal Sn particles (polyester - epoxy resin, blocked isocyanate curing agent) The dried after coating, to prepare a polyester resin A film 0. The average coating thickness of 5 points as an adhesive layer was 5 [mu] m.
　No. The 46 steel materials (barrel member and the can bottom member), No. Using the same Ni-plated steel sheet and 44. That, Ni deposition amount (Ni plating amount), 500 mg / m 2 a, the amount of chromate film, 5 mg / m of a metal Cr terms 2 was.
　Vertical 110 mm, after the steel sheet material having dimensions transverse 170mm and heated to 180 ° C., thermal as polyester resin A film 3, the adhesive layer of polyester resin A film 0 other one side adjoin the steel sheet surface on one side by crimping, to prepare a Ni-plated steel sheet for a can body member (resin film laminated steel plate 3).
[0108]
　No. Polyester resin film and the adhesive layer used in the can body member 47 was fabricated in the following manner. Thickness 12μm of the polyester resin A film one surface to an average particle diameter 5.5μm of metal Sn particles a thermosetting resin in which is dispersed in (polyester - epoxy resin, blocked isocyanate curing agent) The dried after coating, the polyester resin A film 4 was prepared. Sn particle amount is 1500 mg / m 2 is an average coating film thickness of 5 points as an adhesive layer was 5 [mu] m. Further, thermosetting resin on one surface of the polyester resin A film having a thickness of 20μm without metal Sn particles (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating were prepared polyester resin A film 0. The average coating thickness of 5 points as an adhesive layer was 5 [mu] m.
　No. The 47 steel materials (barrel member and the can bottom member), No. Using the same Ni-plated steel sheet and 44. That, Ni deposition amount (Ni plating amount), 500 mg / m 2 a, the amount of chromate film, 5 mg / m of a metal Cr terms 2 was.
　Vertical 110 mm, after the steel sheet material having dimensions transverse 170mm and heated to 180 ° C., thermal as polyester resin A film 4, an adhesive layer of polyester resin A film 0 other one side adjoin the steel sheet surface on one side by crimping, to prepare a Ni-plated steel sheet for a can body member (resin film laminated steel plate 4).
[0109]
　No. Polyester resin film and the adhesive layer used in the can body member 48 was fabricated in the following manner. Thickness 12μm of the polyester resin A film one surface to an average particle diameter 4.0μm of metal Sn particles a thermosetting resin in which is dispersed in (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating the polyester resin A film 5 was prepared. Sn particle amount is 200 mg / m 2 is an average coating film thickness of 5 points as an adhesive layer was 5 [mu] m. Further, thermosetting resin on one surface of the polyester resin A film having a thickness of 20μm without metal Sn particles (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating were prepared polyester resin A film 0. The average coating thickness of 5 points as an adhesive layer was 5 [mu] m.
　No. The 48 steel materials (barrel member and the can bottom member), No. Using the same Ni-plated steel sheet and 44. That, Ni deposition amount (Ni plating amount), 500 mg / m 2 a, the amount of chromate film, 5 mg / m of a metal Cr terms 2 was.
　Vertical 110 mm, after the steel sheet material having dimensions transverse 170mm and heated to 180 ° C., thermal as polyester resin A film 5, an adhesive layer of polyester resin A film 0 other one side adjoin the steel sheet surface on one side by crimping, to prepare a Ni-plated steel sheet for a can body member (resin film laminated steel plate 5).
[0110]
　No. Polyester resin film and the adhesive layer used in the can body member 49 was fabricated in the following manner. Thickness 12μm of the polyester resin A film one surface to an average particle diameter 4.0μm of metal Sn particles a thermosetting resin in which is dispersed in (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating the polyester resin A film 6 was produced. Sn particle amount is 3400Mg / m 2 is an average coating film thickness of 5 points as an adhesive layer was 5 [mu] m. Further, thermosetting resin on one surface of the polyester resin A film having a thickness of 20μm without metal Sn particles (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating were prepared polyester resin A film 0. The average coating thickness of 5 points as an adhesive layer was 5 [mu] m.
　No. The 49 steel materials (barrel member and the can bottom member), No. Using the same Ni-plated steel sheet and 44. That, Ni deposition amount (Ni plating amount), 500 mg / m 2 a, the amount of chromate film, 5 mg / m of a metal Cr terms 2 was.
　Vertical 110 mm, after the steel sheet material having dimensions transverse 170mm and heated to 180 ° C., thermal as polyester resin A film 6, other adhesive layer of polyester resin A film 0 on one side adjoin the steel sheet surface on one side by crimping, to prepare a Ni-plated steel sheet for a can body member (resin film laminated steel plate 6).
[0111]
　No. Polyester resin film and the adhesive layer used in the can body member 50 was fabricated in the following manner. Thickness 12μm of the polyester resin A film one surface to an average particle diameter 4.0μm of metal Sn particles a thermosetting resin in which is dispersed in (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating the polyester resin A film 7 was produced. Sn particle amount is 400 mg / m 2 is an average coating film thickness of 5 points as an adhesive layer was 5 [mu] m. Further, thermosetting resin on one surface of the polyester resin A film having a thickness of 20μm without metal Sn particles (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating were prepared polyester resin A film 0. The average coating thickness of 5 points as an adhesive layer was 5 [mu] m.
　No. The 50 steel materials (barrel member and the can bottom member), No. Using the same Ni-plated steel sheet and 44. That, Ni deposition amount (Ni plating amount), 500 mg / m 2 a, the amount of chromate film, 5 mg / m of a metal Cr terms 2 was.
　Vertical 110 mm, after the steel sheet material having dimensions transverse 170mm and heated to 180 ° C., thermal as polyester resin A film 7, the other adhesive layer of polyester resin A film 0 on one side adjoin the steel sheet surface on one side It is crimped, further to 3.5Mrad irradiating an electron beam to the surface of the polyester resin a film 7 was produced Ni-plated steel sheet for a can body member (resin film laminated steel plate 7).
[0112]
　No. Polyester resin film and the adhesive layer used in the can body member 51 was fabricated in the following manner. Thickness 12μm of the polyester resin A film one surface to an average particle diameter 4.0μm of metal Sn particles a thermosetting resin in which is dispersed in (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating the polyester resin A film 8 were prepared. Sn particle amount is 1800 mg / m 2 is an average coating film thickness of 5 points as an adhesive layer was 5 [mu] m. Further, thermosetting resin on one surface of the polyester resin A film having a thickness of 20μm without metal Sn particles (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating were prepared polyester resin A film 0. The average coating thickness of 5 points as an adhesive layer was 5 [mu] m.
　No. The 51 steel materials (barrel member and the can bottom member), No. Using the same Ni-plated steel sheet and 44. That, Ni deposition amount (Ni plating amount), 500 mg / m 2 a, the amount of chromate film, 5 mg / m of a metal Cr terms 2 was.
　Vertical 110 mm, after the steel sheet material having dimensions transverse 170mm and heated to 180 ° C., thermal as polyester resin A film 8, the other adhesive layer of polyester resin A film 0 on one side adjoin the steel sheet surface on one side by crimping, to prepare a Ni-plated steel sheet for a can body member (resin film laminated steel plate 8).
[0113]
　No. 52 polyester resin film and the adhesive layer used in the can body member was fabricated in the following manner. Thickness 12μm of the polyester resin A film one surface to an average particle diameter 4.0μm of metal Sn particles a thermosetting resin in which is dispersed in (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating the polyester resin A film 9 was produced. Metal Sn particles amount is 1500 mg / m 2 is an average coating film thickness of 5 points as an adhesive layer was 5 [mu] m. Further, thermosetting resin on one surface of the polyester resin A film having a thickness of 20μm without metal Sn particles (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating were prepared polyester resin A film 0. The average coating thickness of 5 points as an adhesive layer was 5 [mu] m.
　No. The 52 steel materials (barrel member and the can bottom member), No. Using the same Ni-plated steel sheet and 44. That, Ni deposition amount is, 500 mg / m 2 a, the amount of chromate film, 5 mg / m of a metal Cr terms 2 was.
　Vertical 110 mm, a steel sheet material having a size of horizontal 170 mm, after heating to 180 ° C., the polyester resin A film 9 on one side, a polyester resin A film 0 such that the adhesive layer is a phase in contact with the steel plate surface to the other single-sided by thermocompression bonding to produce a Ni-plated steel sheet for a can body member (resin film laminated steel plate 9).
[0114]
　No. 53 polyester resin film and the adhesive layer used in the can body member was fabricated in the following manner. Thickness 12μm of the polyester resin A based film one surface to an average particle diameter 4.0μm of metal Sn particles a thermosetting resin in which is dispersed in (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating and polyester resin A the film 10 was produced. Metal Sn particles amount is 1500 mg / m 2 is an average coating film thickness of 5 points as an adhesive layer was 5 [mu] m. Further, 20 [mu] m of the polyester resin A based film thermosetting resin containing no metal Sn particles on one side of (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating, to prepare a polyester resin A film 0. The average coating thickness of 5 points as an adhesive layer was 5 [mu] m.
　No. The 53 steel materials (barrel member and the can bottom member), with the exception of Ni deposition amount No. Using Ni-plated steel sheet was produced in the same manner as 44. Ni deposition amount (Ni plating amount), 260 mg / m 2 a, the amount of chromate film, 5 mg / m of a metal Cr terms 2 was.
　Vertical 110 mm, after the steel sheet material having dimensions transverse 170mm and heated to 180 ° C., thermal as polyester resin A film 10, an adhesive layer of polyester resin A film 0 other one side adjoin the steel sheet surface on one side by crimping, to prepare a Ni-plated steel sheet for a can body member (resin film laminated steel plate 10).
[0115]
　No. Polyester resin film and the adhesive layer used in the can body member 54 was fabricated in the following manner. Thickness 12μm of the polyester resin A film one surface to an average particle diameter 4.0μm of metal Sn particles a thermosetting resin in which is dispersed in (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating the polyester resin A film 11 were produced. Metal Sn particles amount is 1500 mg / m 2 is an average coating film thickness of 5 points as an adhesive layer was 5 [mu] m. Further, thermosetting resin on one surface of the polyester resin A film having a thickness of 20μm without metal Sn particles (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating were prepared polyester resin A film 0. The average coating thickness of 5 points as an adhesive layer was 5 [mu] m.
　No. The 54 steel materials (barrel member and the can bottom member), with the exception of Ni deposition amount No. Using Ni-plated steel sheet was produced in the same manner as 44. Ni deposition amount (Ni plating amount), 950 mg / m 2 a, the amount of chromate film, 5 mg / m of a metal Cr terms 2 was.
　Vertical 110 mm, after the steel sheet material having dimensions transverse 170mm and heated to 180 ° C., thermal as polyester resin A film 11, the adhesive layer of polyester resin A film 0 other one side adjoin the steel sheet surface on one side by crimping, to prepare a Ni-plated steel sheet for a can body member (resin film laminated steel plate 11).
[0116]
　No. Polyester resin film and the adhesive layer used in the can body member 55 was fabricated in the following manner. Thickness 12μm of the polyester resin B film one surface to an average particle diameter 4.0μm of metal Sn particles a thermosetting resin in which is dispersed in (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating and polyester resin B film to prepare a 12. Metal Sn particles amount is 1500 mg / m 2 is an average coating film thickness of 5 points as an adhesive layer was 5 [mu] m. Further, thermosetting resin on one surface of the polyester resin B film having a thickness of 20μm without metal Sn particles (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating and to produce a polyester resin B film 0. The average coating thickness of 5 points as an adhesive layer was 5 [mu] m.
　No. The 55 steel materials (barrel member and the can bottom member), with the exception of the amount of chromate film No. Using Ni-plated steel sheet was produced in the same manner as 44. Ni deposition amount (Ni plating amount), 500 mg / m 2 a, the amount of chromate film, 3 mg / m of a metal Cr terms 2 was.
　Vertical 110 mm, after the steel sheet material having dimensions transverse 170mm and heated to 180 ° C., thermal as polyester resin B film 12, the adhesive layer of polyester resin B film 0 other one side adjoin the steel sheet surface on one side by crimping, to prepare a Ni-plated steel sheet for a can body member (resin film laminated steel plate 12).
[0117]
　No. Polyester resin film and the adhesive layer used in the can body member 56 was fabricated in the following manner. Thickness 12μm of the polyester resin C film one surface to an average particle diameter 4.0μm of metal Sn particles a thermosetting resin in which is dispersed in (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating and polyester resin C film 13 were produced. Metal Sn particles amount is 1500 mg / m 2 is an average coating film thickness of 5 points as an adhesive layer was 5 [mu] m. Further, thermosetting resin on one surface of the polyester resin C film having a thickness of 20μm without metal Sn particles (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating and to produce a polyester resin C film 0. The average coating thickness of 5 points as an adhesive layer was 5 [mu] m.
　No. The 56 steel materials (barrel member and the can bottom member), with the exception of the amount of chromate film No. Using Ni-plated steel sheet was produced in the same manner as 44. Ni deposition amount (Ni plating amount), 500 mg / m 2 a, the amount of chromate film, 8 mg / m of a metal Cr terms 2 was.
　Vertical 110 mm, after the steel sheet material having dimensions transverse 170mm and heated to 180 ° C., thermal as polyester resin C film 13, the adhesive layer of polyester resin C film 0 other one side adjoin the steel sheet surface on one side by crimping, to prepare a Ni-plated steel sheet for a can body member (resin film laminated steel plate 13).
[0118]
　No. Polyester resin film and the adhesive layer used in the can body member 57 was fabricated in the following manner. Thickness 12μm of the polyester resin A film one surface to an average particle diameter 1.5μm of metal Sn particles a thermosetting resin in which is dispersed in (polyester - epoxy resin, blocked isocyanate curing agent) The dried after coating, the polyester resin A film 21 were produced. Metal Sn particles amount is 1500 mg / m 2 is an average coating film thickness of 5 points as an adhesive layer was 5 [mu] m. Further, thermosetting resin on one surface of the polyester resin A film having a thickness of 20μm without metal Sn particles (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating were prepared polyester resin A film 0. The average coating thickness of 5 points as an adhesive layer was 5 [mu] m.
　No. The 57 steel materials (barrel member and the can bottom member), No. Using the same Ni-plated steel sheet and 44. That, Ni deposition amount (Ni plating amount), 500 mg / m 2 a, the amount of chromate film, 5 mg / m of a metal Cr terms 2 was.
　Vertical 110 mm, after the steel sheet material having dimensions transverse 170mm and heated to 180 ° C., thermal as polyester resin A film 21, the adhesive layer of polyester resin A film 0 other one side adjoin the steel sheet surface on one side by crimping, to prepare a Ni-plated steel sheet for a can body member (resin film laminated steel plate 21).
[0119]
　No. Polyester resin film and the adhesive layer used in the can body member 58 was fabricated in the following manner. Thickness 12μm of the polyester resin A film one surface to an average particle diameter 8.0μm of metal Sn particles a thermosetting resin in which is dispersed in (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating the polyester resin A film 22 were produced. Metal Sn particles amount is 1500 mg / m 2 is an average coating film thickness of 5 points as an adhesive layer was 5 [mu] m. Further, thermosetting resin on one surface of the polyester resin A film having a thickness of 20μm without metal Sn particles (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating were prepared polyester resin A film 0. The average coating thickness of 5 points as an adhesive layer was 5 [mu] m.
　No. The 58 steel materials (barrel member and the can bottom member), No. Using the same Ni-plated steel sheet and 44. That, Ni deposition amount (Ni plating amount), 500 mg / m 2 a, the amount of chromate film, 5 mg / m of a metal Cr terms 2 was.
　Vertical 110 mm, after the steel sheet material having dimensions transverse 170mm and heated to 180 ° C., thermal as polyester resin A film 22, the adhesive layer of polyester resin A film 0 other one side adjoin the steel sheet surface on one side by crimping, to prepare a Ni-plated steel sheet for a can body member (resin film laminated steel plate 22).
[0120]
　No. 59 polyester resin film and the adhesive layer used in the can body member was fabricated in the following manner. Thickness 12μm of the polyester resin A film one surface to an average particle diameter 4.0μm of metal Sn particles a thermosetting resin in which is dispersed in (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating the polyester resin A film 23 were produced. Metal Sn particles amount is 50 mg / m 2 is an average coating film thickness of 5 points as an adhesive layer was 5 [mu] m. Further, thermosetting resin on one surface of the polyester resin A film having a thickness of 20μm without metal Sn particles (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating were prepared polyester resin A film 0. The average coating thickness of 5 points as an adhesive layer was 5 [mu] m.
　No. The 59 steel materials (barrel member and the can bottom member), No. Using the same Ni-plated steel sheet and 44. That, Ni deposition amount (Ni plating amount), 500 mg / m 2 a, the amount of chromate film, 5 mg / m of a metal Cr terms 2 was.
　Vertical 110 mm, after the steel sheet material having dimensions transverse 170mm and heated to 180 ° C., thermal as polyester resin A film 23, the adhesive layer of polyester resin A film 0 other one side adjoin the steel sheet surface on one side by crimping, to prepare a Ni-plated steel sheet for a can body member (resin film laminated steel plate 23).
[0121]
　No. Polyester resin film and the adhesive layer used in the can body member 60 was fabricated in the following manner. Thickness 12μm of the polyester resin A film one surface to an average particle diameter 4.0μm of metal Sn particles a thermosetting resin in which is dispersed in (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating the polyester resin A film to prepare a 24. Metal Sn particles amount is 4000 mg / m 2 is an average coating film thickness of 5 points as an adhesive layer was 5 [mu] m. Further, thermosetting resin on one surface of the polyester resin A film having a thickness of 20μm without metal Sn particles (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating were prepared polyester resin A film 0. The average coating thickness of 5 points as an adhesive layer was 5 [mu] m.
　No. The 60 steel materials (barrel member and the can bottom member), No. Using the same Ni-plated steel sheet and 44. That, Ni deposition amount (Ni plating amount), 500 mg / m 2 a, the amount of chromate film, 5 mg / m of a metal Cr terms 2 was.
　Vertical 110 mm, after the steel sheet material having dimensions transverse 170mm and heated to 180 ° C., thermal as polyester resin A film 24, the adhesive layer of polyester resin A film 0 other one side adjoin the steel sheet surface on one side by crimping, to prepare a Ni-plated steel sheet for a can body member (resin film laminated steel plate 24).
[0122]
　No. 61 polyester resin film and the adhesive layer used in the can body member was fabricated in the following manner. Thickness 12μm of the polyester resin A film one surface to an average particle diameter 4.0μm of metal Sn particles a thermosetting resin in which is dispersed in (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating the polyester resin A film to prepare a 25. Metal Sn particles amount is 1500 mg / m 2 is an average coating film thickness of 5 points as an adhesive layer was 5 [mu] m. Further, thermosetting resin on one surface of the polyester resin A film having a thickness of 20μm without metal Sn particles (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating were prepared polyester resin A film 0. The average coating thickness of 5 points as an adhesive layer was 5 [mu] m.
　No. The 61 steel materials (barrel member and the can bottom member), with the exception of Ni deposition amount No. Using Ni-plated steel sheet was produced in the same manner as 44. Ni deposition amount (Ni plating amount), 150 mg / m 2 a, the amount of chromate film, 5 mg / m of a metal Cr terms 2 was.
　Vertical 110 mm, after the steel sheet material having dimensions transverse 170mm and heated to 180 ° C., thermal as polyester resin A film 25, the adhesive layer of polyester resin A film 0 other one side adjoin the steel sheet surface on one side by crimping, to prepare a Ni-plated steel sheet for a can body member (resin film laminated steel plate 25).
[0123]
　No. 62 polyester resin film and the adhesive layer used in the can body member was fabricated in the following manner. Thickness 12μm of the polyester resin A film one surface to an average particle diameter 4.0μm of metal Sn particles a thermosetting resin in which is dispersed in (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating the polyester resin A film 26 were produced. Metal Sn particles amount is 1500 mg / m 2 is an average coating film thickness of 5 points as an adhesive layer was 5 [mu] m. Further, thermosetting resin on one surface of the polyester resin A film having a thickness of 20μm without metal Sn particles (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating were prepared polyester resin A film 0. The average coating thickness of 5 points as an adhesive layer was 5 [mu] m.
　No. The 62 steel materials (barrel member and the can bottom member), with the exception of the amount of chromate film No. Using Ni-plated steel sheet was produced in the same manner as 44. Ni deposition amount (Ni plating amount), 500 mg / m 2 a, the amount of chromate film, 1 mg / m of a metal Cr terms 2 was.
　Vertical 110 mm, after the steel sheet material having dimensions transverse 170mm and heated to 180 ° C., thermal as polyester resin A film 26, the adhesive layer of polyester resin A film 0 other one side adjoin the steel sheet surface on one side by crimping, to prepare a Ni-plated steel sheet for a can body member (resin film laminated steel plate 26).
[0124]
　No. 63 polyester resin film and the adhesive layer used in the can body member was fabricated in the following manner. Thickness 12μm of the polyester resin A film one surface to an average particle diameter 4.0μm of metal Sn particles a thermosetting resin in which is dispersed in (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating the polyester resin A film 27 were produced. Metal Sn particles amount is 1500 mg / m 2 is an average coating film thickness of 5 points as an adhesive layer was 5 [mu] m. Further, thermosetting resin on one surface of the polyester resin A film having a thickness of 20μm without metal Sn particles (polyester - epoxy resin, blocked isocyanate curing agent) was dried after coating were prepared polyester resin A film 0. The average coating thickness of 5 points as an adhesive layer was 5 [mu] m.
　No. The 63 steel materials (barrel member and the can bottom member), with the exception of the amount of chromate film No. Using Ni-plated steel sheet was produced in the same manner as 44. Ni deposition amount (Ni plating amount), 500 mg / m 2 a, the amount of chromate film, 12 mg / m of a metal Cr terms 2 was.
　Vertical 110 mm, after the steel sheet material having dimensions transverse 170mm and heated to 180 ° C., thermal as polyester resin A film 27, the adhesive layer of polyester resin A film 0 other one side adjoin the steel sheet surface on one side by crimping, to prepare a Ni-plated steel sheet for a can body member (resin film laminated steel plate 27).
[0125]
　Above No. In 44 to 63, in addition to the above evaluation items (1) to (3), the following evaluation items (6) was also evaluated.
　In order to more strictly evaluate the evaluation of corrosion resistance, the can bottom member, Ni plating is applied to the steel sheet surface, the surface Sn plating Ni plating is applied, electrolytic chromic acid treatment to the surface of the Sn-plated using Sn-plated steel sheet subjected to evaluate the item (3) above . In this Sn-plated steel sheet, Ni plating amount, 50 mg / m 2 a, metal Sn plating amount, 1000 mg / m 2 a, metallic Cr quantity, 10 mg / m 2 a, hydrated chromium oxide metal Cr translation amount, 7 mg / m 2 was. In this case, not only can grasp the corrosion resistance in a can body member alone can be grasped in a short time as possible corrosion resistance of can body members in a longer period of time.
[0126]
　(6) color measurement (film appearance)
　was measured by prepared various polyester resin film laminated steel plate color Nippon electrostatic color tone (barrel steel member) Industrial Co. microfacet spectral color difference meter VSS400. The range of the measurement region was set to 0.5 mm in diameter.
　L value when metal-free Sn particles compared to (film appearance), "A (good)" if decrease in L value is less than 2, when decrease in L value is 2 or more and less than 5 "B (practicable)", and was evaluated as "(practical difficulties when it is required film appearance) C" when lowering the L value is greater than 5.
[0127]
　The evaluation results can manufacturing conditions (polyester film, the adhesive layer, the metal Sn particles, Ni plating amount, chromate coating amount) in conjunction with Table 3 shows. It should be noted that the overall evaluation for the above evaluation items (1) to (3) and (6) (as determined by the lowest evaluation) was also carried out.
[0128]
　As shown in Table 3, No. The can body 44-56, both weldability, appearance, film adhesion threaded portion, corrosion resistance (filiform rust resistance) was sufficient. In addition, No. 57 The can body and 60 and 63, both weldability, film adhesion threaded portion, corrosion resistance (filiform rust resistance) was level no practical problem.
　However, No. 44 The can body to 56, the average particle diameter of the metal Sn particles is controlled to be more than 2 [mu] m, No. Can body of corrosion resistance and film appearance than the can body 57 (brightness of the film) was further improved. In particular, No. The can body 45 to 46 and 50-56, the average particle diameter of the metal Sn particles is controlled to be more than 3 [mu] m, No. Can body of corrosion resistance and film appearance than the can body 44 (brightness of the film) was further improved.
　In addition, No. 44 The can body to 56, the average particle diameter of the metal Sn particles is controlled to 7μm or less, No. Film adhesion and film appearance of the threaded portion than the can body 58 (brightness of the film) was further improved. In particular, No. The can body 45 to 46 and 50-56, the average particle diameter of the metal Sn particles is controlled to 6μm or less, No. Film adhesion threaded portion is further improved compared to the can body 44.
　In addition, No. 44 The can body to 56, the content of Sn metal particles in the adhesive layer is 100 mg / m 2 because it is controlled to the above, No. Can body of corrosion resistance and film appearance than the can body 59 (brightness of the film) was further improved. In particular, No. The can body 45 to 46 and 50-56, the content of Sn metal particles in the adhesive layer is 300 mg / m 2 because it is controlled to the above, No. Corrosion resistance of the can body is further improved compared to the can body 48.
　In addition, No. 44 The can body to 56, the content of Sn metal particles in the adhesive layer is 3600 mg / m 2 because it is controlled below, No. 60 of the can body film appearance than the (brightness of the film) and film adhesion threaded portion is further improved. In particular, No. The can body 45 to 46 and 50-56, the content of Sn metal particles in the adhesive layer is 2000 mg / m 2 because it is controlled to the above, No. Corrosion resistance of the can body is further improved compared to the can body 49.
　In addition, No. 44 The can body to 56, since the more optimally control the chromate coating amount of the can barrel member, No. Weldability can body member is further improved as compared with the can body 63.
　Thus, the average particle diameter and content of the metal Sn particles are more preferable range No. The can body 45-46 and 50-56, were excellent in all the evaluation items.
[0129]
　No. The can body 61, for plating the metal of the weld portion of the can body member is not sufficient, the welding of the can body member is not sufficient. No. The can body 62, for chromate coating of a can body member is not sufficient, the film adhesion and corrosion resistance of the threaded portion of the can body member is not sufficient.
[0130]
[table 3]

[0131]
　Therefore, No. And can body member 44 to 60 and 63, when combined with a can bottom member made from Sn-plated steel sheet produced by any of the above process 4-6, the evaluation items (1) to (3) it is considered possible to obtain excellent the can body about.
[0132]
　Having described the preferred embodiments of the present invention, the present invention is not limited to such an example. Those skilled in the art within the scope described in the claims, it would be appreciated by the can conceive modifications, combinations, and belong to the technical scope of the present invention as for their It is understood.
Industrial Applicability
[0133]
　According to the present invention, excellent in the film adhesion and corrosion resistance, acid liquid, in particular, it is possible to provide a three-piece resealing cans storable acidic beverage fruit juice with high quality.
DESCRIPTION OF SYMBOLS
[0134]
　1 3-piece resealing cans (cans, resealing the
　can) 2 (2A ~ 2F) can body member (barrel, the can
　body) 3 (3A ~ 3J) can bottom member (can bottom, the can bottom, bottom cover, can lid)
　4 cap
　5 can body
　21 threaded portion (threaded
　portion) 22 welded portion
　23 polyester film (organic film, PET
　film) 24 chromate film
　25 Ni plating
　26 steel (plated original
　plate) 27 Sn plating
　27A single metal Sn plating (unalloyed Sn
　plating) 27B alloyed Sn plating
　28 adhesive layer
　28A of Sn metal particles
　34 chromate film
　35 Ni plating
　36 steel (plated original
　plate) 37 Sn plating
　37A single metal Sn plating (unalloyed Sn
　plating) 37B alloyed Sn plating

WE CLAIM

[Claim 1]　A cylindrical can body member having a threaded portion at one end;
　a can bottom member in contact with the can barrel member so as to close the opening of the other end of the can barrel member;
equipped with,
　the can barrel member,
　the cylinder Jo of the first steel plate;
　and Ni plating formed on the inner peripheral surface of said first steel plate;
　and a polyester film formed so as to be disposed on the inner periphery of the outermost surface of the can barrel member,
　said first as one of the steel sheet and the chromate film is formed between the polyester film;
has,
　the amount of Ni plating, 10 ~ 1000 mg / m 2 a, the amount of the chromate film is 2 in the metal Cr terms ~ 30 mg / m 2 a, the amount of closest metal plating on the inner periphery of the outermost surface of the can barrel member, 200 ~ 4000 mg / m 2 a,
　the can bottom member,
　and a second steel plate;
　the first two and Sn plating formed on the can barrel member side of the steel plate of;
have,
　Serial Sn plating, 2 ~ 20 g / m 2 comprising a single metal Sn plating in the amount of
acidic 3-piece resealing cans liquid, characterized in that.
[Claim 2]
　The outermost surface of the can body member side, acidic liquids for three-piece resealing can according to claim 1, wherein a Sn plating of the can bottom member.
[Claim 3]
　The can bottom member has the further chromate film formed on the surface of the Sn plating, the amount of the chromate film is 2 ~ 10 mg / m of a metal Cr terms 2 is, the outermost surface of the can bottom member , acidic 3-piece resealing cans liquid according to claim 1, wherein a chromate film.
[Claim 4]
　The Sn plating, 0.2 ~ 1.5 g / m 2 acid 3-piece resealing cans liquid according to claim 1, characterized in that it comprises an alloying Sn plating amount.
[Claim 5]
　The can bottom member, said second of said can body member side is formed on the surface 10 ~ 200 mg / m of the steel plate 2 acidic liquids according to claim 1, further comprising a Ni plating in the amount of use a three-piece resealing cans.
[Claim 6]
　Wherein the amount of the single metal Sn plating, 8 ~ 16g / m 2 3-piece resealing cans of acidic liquid according to claim 1, characterized in that a.
[Claim 7]
　The amount of the Ni plating, 200 ~ 1000 mg / m 2 a, the amount of the chromate film is, 2 ~ 10 mg / m of a metal Cr terms 2 acid liquid for 3 according to claim 1, characterized in that the piece resealing cans.
[8.]
　The can barrel member has the Ni plating further Sn plating formed on the surface, the Sn plating, 0.2 ~ 2 g / m 2 comprises a single metal Sn plating, and alloying the Sn plating, wherein the amount of Ni plating, 10 ~ 200 mg / m 2 a, the amount of the chromate film is, 10 ~ 30 mg / m 2 acid 3-piece resealing cans liquid according to claim 1, characterized in that a.
[Claim 9]
　The can barrel member, said a chromate film, acid 3-piece resealing cans liquid according to claim 1, further comprising an adhesive layer formed between the polyester film.
[Claim 10]
　Said adhesive layer, a Sn metal particles having an average particle size of 2 ~ 7μm, 100 ~ 3600mg / m of the surface area of said first steel plate 2 acid liquid according to claim 9, characterized in that it contains use a three-piece resealing cans.
[Claim 11]
　The metal-average particle diameter of the Sn particles, acidic liquids for three-piece resealing can according to claim 10, characterized in that a 3 ~ 6 [mu] m.
[Claim 12]
　Said adhesive layer, said metal Sn particles, the first 300 ~ 2000 mg / m of the surface area of the steel plate 2 three-piece resealing cans acid liquid according to claim 10, characterized in that it contains.
[Claim 13]
　The resistance between the can body member and the can bottom member, acidic liquids for three-piece resealing can according to claim 1, characterized in that less than 1 [Omega.
[Claim 14]
　The resistance between the can body member and the can bottom member, acidic liquids for three-piece resealing can according to claim 13, characterized in that a 0.1Ω or less.