0001]Embodiments of the present disclosure includes a body portion having a body portion and a flange portion, a lid portion joined to the flange portion, a container and a manufacturing method thereof comprises a.
BACKGROUND
[0002]A body having a vessel containing contents such as cooked food, for example, as disclosed in Patent Document 1, and the body defining a housing portion and a flange portion extending from an upper portion of the body portion to the outside and parts, and a lid joined to the flange portion, the container with a known. The container, venting mechanism for discharging the steam generated when the contents are heated by a microwave oven to the outside. In the disclosed container in Patent Document 1, venting mechanism, a through hole formed in the vapor release seal part of the butt portion of the lid portion (rafter part).
CITATION
Patent Document
[0003]
Patent Document 1: Japanese Patent No. 4911030
Summary of the Invention
Problems that the Invention is to Solve
[0004]
　In Patent Document 1 described above, rafter part by overlapping inner surfaces of a portion of the two multi-layer films is formed. In this case, the end portion of the multilayer film at the distal end of the rafter part because exposed to the outside, such as bacteria are more likely to become contaminated from the tip of the rafter part into the interior of the container.
[0005]
　Embodiments of the present disclosure is intended to provide a container and a manufacturing method thereof Such object can effectively resolve.
Means for Solving the Problems
[0006]
　According to the first embodiment of the present disclosure, the container having a storage portion for storing contents,
　a body portion having a body portion defining said housing portion, and a flange portion extending outwardly from the upper portion of the body portion When,
　the receiving portion a lid that is bonded via the outer sealing portion to the flange portion of the main body portion so as to cover the lid portion constituted by a lid member is folded back at the folding portion such that a portion overlapping When provided with,
　the lid, and a rafter part extending with the portion of the lid overlap in the first direction to the other side of the edge from one side edge of the lid, so as to sandwich the rafter part position and has a first lid and a second lid portion configured by the lid,
　the rafter part, the first direction from one side edge of the lid to the edge of the other side rafter seal inner surfaces of the portion of the lid member to extend is joined If, anda蒸通portion comprising outs through hole or cut formed in the rafter seal portion,
　the seal strength of the rafter seal portion is lower than the seal strength of the outer seal portion.
[0007]
　A container according to the first embodiment of the present disclosure, the maximum distance between the inner edge of the outer seal portion facing in the first direction D1, the outer seal portion facing in a second direction perpendicular to said first direction it may be smaller than the maximum distance between the inner edge.
[0008]
　A container according to the first embodiment of the present disclosure, the flange portion includes a first edge and a second edge opposing each other in a second direction perpendicular to the first direction,
　the rafter part, the main body it may extend in the first direction in the first edge portion side than the center point of the receiving portion of the parts.
[0009]
　In the container according to the first embodiment of the present disclosure, the maximum distance in the second direction between the inner edge of the outer seal portion along the center point and the first edge portion of the accommodating portion of the main body portion L1 represents, if it represents the maximum distance in the second direction between the outer seal portion inner edge of the along the base and the first edge of the rafter part in L2, L2 / L1 is 0.3 or more and 0.6 it may be less than or equal to.
[0010]
　A container according to the first embodiment of the present disclosure, preferably, the sealing strength of the rafter seal portion at 15mm width when the 25 ° C. is 12N or less.
[0011]
　A container according to the first embodiment of the present disclosure, the 蒸通 unit may include the through hole formed in the rafter seal portion so as not reach the folded portion of the rafter part.
[0012]
　A container according to the first embodiment of the present disclosure, the through hole, a shape extending linearly along the first direction may be at least partially have.
[0013]
　A container according to the first embodiment of the present disclosure, the 蒸通 unit may include a lack the cut formed in the rafter seal portion in the folded portion of the rafter part.
[0014]
　A container according to the first embodiment of the present disclosure, the axis having the minimum distance when connecting two points of the outer edge of the street outer seal portion the center point of the receiving portion and the A-axis, through the center point of the housing part when the axis connecting the two points of the outer edge of the outer seal portion to be perpendicular to the a axis and B axis, the length of the a-axis is shorter than the length of the B-axis,
　the rafter part, crossing the housing part together, it may be provided along the B axis.
[0015]
　A container according to the first embodiment of the present disclosure, the ratio of the length of the B-axis to the length of the A axis may be 1.2 to 3.0.
[0016]
　A container according to the first embodiment of the present disclosure, the base material constituting the main body, and the thermoplastic resin layer constituting the inner surface is located in the housing part side, the thermoplastic resin layer to be laminated substrates has the, at least,
　the base material of the base material may also include a stretched film.
[0017]
　A container according to the first embodiment of the present disclosure, the bottom member further may have a printing layer.
[0018]
　A container according to the first embodiment of the present disclosure, the tensile strength of the base material may be not more than 40 MPa.
[0019]
　Container according to a first embodiment of the present disclosure further comprises a opening means formed in the cover portion and the flange portion,
　the tear strength of the body portion and the lid portion may be not more than 15N.
[0020]
　A container according to the first embodiment of the present disclosure, the flange portion includes a first edge and a second edge extending parallel to each other,
　said opening means, said outer edge seal extending along the first edge portion in inner position than part, it may be configured so as to facilitate tearing said flange portion extending along said first edge.
[0021]
　A container according to the first embodiment of the present disclosure, the opening means may comprise at least the notches formed in the flange portion or scar group.
[0022]
　According to the first embodiment of the present disclosure, it includes a storage portion for storing contents, and the pressure of the receiving portion is said accommodating portion of a container comprising a蒸通portion that is configured to communicate with the outside when increasing manufacturing method,
　and a body portion defining said housing portion, a body portion preparation step of preparing a body portion and a flange portion extending outwardly from the upper portion of the barrel,
　the contents in the barrel portion of the body portion a step of filling, the steps of preparing a lid for covering the accommodating portion, a
　and a step of forming an outer edge seal portion bonded to the flange portion of the lid main body portion,
　said lid portion Preparing the process includes the steps of forming a rafter part is folded in step a, said cover member said cover member folded portion such that a portion overlapping of preparing a lid member for forming the lid portion, the rafter part Gassho by joining inner surfaces of the portion of the lid member in Forming a Lumpur portion, the rafter seal portion, and a step of forming a outs through hole or cut forming the蒸通portion,
　the sealing strength of the rafter seal portion, the outer seal portion lower than the seal strength.
[0023]
　The method of manufacturing a container according to the first embodiment of the present disclosure, the body portion preparation step, the a step of preparing a base material for constituting a main body portion, said performing draw forming the base material said barrel portion forming a may contain.
[0024]
　The method of manufacturing a container according to the first embodiment of the present disclosure, the base material for constituting the main body, and the thermoplastic resin layer constituting the inner surface is located in the housing part side, to the thermoplastic resin layer has a laminated substrate, at least,
　the base material of the base material may also include a stretched film.
[0025]
　Container according to the second embodiment of the present disclosure includes a body portion defining a housing portion, and a flange portion provided over the circumference on the top of the body portion, the body portion comprising (container body), the body comprising parts and the cover member joined to the flange portion so as to cover the accommodating portion of the,
　between the flange portion and the lid portion and the outer sealing portion is provided over the circumference,
　lid, inner faces There has rafter portions facing,
　rafter portion includes a first rafter seal portion of the two extending toward the distal end of the rafter part from the flange portion, a second rafter located between the first rafter seal portion of the two and the seal portion has a
　shaft having the minimum distance to the center of the housing portion when connecting two points of the outer edge of the street outer seal portion and the a-axis center perpendicular to the through axis a of housing part the axis connecting the two points of the outer edge of the outer seal portion when the B-axis as the length of the a-axis is shorter than the length of the B-axis ,
　Rafter part, with crossing the accommodating portion is provided along the B axis,
　蒸通portion is provided in the second rafter seal.
[0026]
　A container of a second embodiment of the present disclosure, the rafter part can be formed by one sheet of substrate is folded back.
[0027]
　A container of a second embodiment of the present disclosure, the 蒸通 section cuts, may include a notch, or hole.
[0028]
　A container of a second embodiment of the present disclosure, the outer seal portion may be formed by 7mm less wide than 3 mm.
[0029]
　A container of a second embodiment of the present disclosure, the ratio of the length of the B-axis to the length of the A axis may be 1.2 to 3.0.
[0030]
　According to a third embodiment of the present disclosure, the container having a storage portion for storing contents,
　a body portion having a body portion defining said housing portion, and a flange portion extending outwardly from the upper portion of the body portion a is the bottom member and the main body constituted by (first laminate),
　a lid portion which is bonded via the outer sealing portion to the flange portion of the main body portion so as to cover the accommodating portion, the lid a lid constituted by wood (second laminate),
　and a蒸通portion configured to cause the receiving portion communicate with the outside of the container when the pressure of the receiving portion is increased,
　the bottom member has a thermoplastic resin layer constituting the inner surface is located in the housing part side, base and material laminated to the thermoplastic resin layer, at least,
　the base material of the base material comprises a stretched film .
[0031]
　A container of a third embodiment of the present disclosure, the base material is further a printed layer provided on the substrate so that the display unit is visible when viewing the body portion from the outer surface of the bottom member it may have.
[0032]
　A container of a third embodiment of the present disclosure, the tensile strength of the base material may be not more than 40 MPa.
[0033]
　A container of a third embodiment of the present disclosure, the bonding strength between the lid portion and the flange portion may be more than 23N.
[0034]
　A container of a third embodiment of the present disclosure, the depth of the body portion may be and 20mm inclusive 5 mm.
[0035]
　A container of a third embodiment of the present disclosure, the thickness of the base material may also be 150μm or less.
[0036]
　According to a third embodiment of the present disclosure, it includes a storage portion for storing contents, and the pressure of the receiving portion is said accommodating portion of a container comprising a蒸通portion that is configured to communicate with the outside when increasing manufacturing method,
　the steps of: preparing a body portion defining said accommodating portion, the bottom member for constituting a main body portion and a flange portion extending outwardly from the upper portion of the torso portion (first laminate)
　wherein the step of performing drawing to the bottom material to form the body portion,
　and filling the contents into the barrel portion,
　a lid member for forming a lid that covers the housing portion (second laminate) a step of overlaying the base material and
　the lid member, and a step of bonding the flange portion extending outwardly from the upper portion of the body portion of said bottom member,
　said bottom member is positioned in the housing part side and the thermoplastic resin layer constituting the inner surface, base and material laminated to the thermoplastic resin layer, the less Also has,
　the base material of the base material comprises a stretched film.
[0037]
　The method of manufacturing a container of the third embodiment of the present disclosure, printing the base material is, the display unit when the outer surface of the bottom member viewed the body portion is provided on the substrate so as to be visually recognized it may further have a layer.
[0038]
　The method of manufacturing a container of the third embodiment of the present disclosure, the tensile strength of the base material may be not more than 40 MPa.
[0039]
　According to a fourth embodiment of the present disclosure, the container having a storage portion for storing contents,
　a body portion having a body portion defining said housing portion, and a flange portion extending outwardly from the upper portion of the body portion a is the bottom member and the main body constituted by (first laminate),
　a lid portion which is bonded via the outer sealing portion to the flange portion of the main body portion so as to cover the accommodating portion, the lid wood (second laminate) lid constituted by,
　a蒸通portion of the accommodating portion configured to communicate with the outside of the container when the pressure of the receiving portion is increased,
　the lid and the flange and a opening means formed in the part,
　the tear strength of the body portion and the lid portion is not more than 15N.
[0040]
　A container of the fourth embodiment of the present disclosure, the flange portion includes first edge extending in a first direction and a second edge parallel to each other,
　said opening means, said main body portion in said first direction and it may be configured so as to facilitate tearing the lid.
[0041]
　A container of the fourth embodiment of the present disclosure, the opening means is the inner position than the outer edge seal portion extending along the first edge portion, said flange portion extending along the first edge portion it may be configured so as to facilitate tearing.
[0042]
　A container of the fourth embodiment of the present disclosure, the base material is first comprising a thermoplastic resin layer constituting the inner surface is located in the housing part side, a stretched film stretched in the first direction a substrate may be a not least have.
[0043]
　A container of the fourth embodiment of the present disclosure, the opening means may comprise at least the notches formed in the flange portion or scar group.
[0044]
　A container of the fourth embodiment of the present disclosure, the bonding strength between the lid portion and the flange portion may be more than 23N.
[0045]
　A container of the fourth embodiment of the present disclosure, the depth of the body portion may be and 20mm inclusive 5 mm.
[0046]
　A container of the fourth embodiment of the present disclosure, the thickness of the base material may also be 150μm or less.
[0047]
　According to a fourth embodiment of the present disclosure, it includes a storage portion for storing contents, and the pressure of the receiving portion is said accommodating portion of a container comprising a蒸通portion that is configured to communicate with the outside when increasing manufacturing method,
　the steps of: preparing a body portion defining said accommodating portion, the bottom member for constituting a main body portion and a flange portion extending outwardly from the upper portion of the torso portion (first laminate)
　wherein the step of performing drawing to the bottom material to form the body portion,
　and filling the contents into the barrel portion,
　a lid member for forming a lid that covers the housing portion (second laminate) a step of superimposing on said bottom member,
　said cover member, and a step of bonding the flange portion extending outwardly from the upper portion of the torso portion of the base material,
　the flange portion is formed with a opening means ,
　the drawing is the melting point of the thermoplastic resin layer of the temperature of the base material is a base material It is carried out in the stomach temperature.
[0048]
　The method of manufacturing a container of the fourth embodiment of the present disclosure, the tear strength of the body portion and the lid portion may be not more than 15N.
[0049]
　The method of manufacturing a container of the fourth embodiment of the present disclosure, the flange portion includes first edge extending in a first direction and a second edge parallel to each other,
　said opening means in said first direction it may be configured so as to facilitate tearing the body portion and the lid portion.
The invention's effect
[0050]
　According to the container according to the first embodiment of the present disclosure, it is possible to suppress the like bacteria will be mixed into the interior of the container from the tip of the rafter part.
BRIEF DESCRIPTION OF THE DRAWINGS
[0051]
FIG. 1 is a plan view showing a container in the first embodiment.
It is a cross-sectional view of the container shown in FIG. 2A] FIG 1 shows the case taken along line II-II.
It is a sectional view showing a modification of蒸通portion of FIG. 2B] container.
3 is a sectional view showing an example of the layer structure of the base material constituting the main body portion.
4 is a sectional view showing another example of the layer structure of the base material constituting the main body portion.
5 is a sectional view showing another example of the layer structure of the base material constituting the main body portion.
6 is a sectional view showing another example of the layer structure of the base material constituting the main body portion.
7 is a sectional view showing an example of the layer structure of the cover material forming the lid.
8 is a sectional view showing another example of the layer structure of the cover material forming the lid.
9 is a sectional view showing another example of the layer structure of the cover material forming the lid.
10 is a diagram showing a first test strip for measuring the sealing strength of the rafter seal portion of the rafter part of the lid.
11 is a diagram showing a second test strip for measuring the sealing strength of the outer seal portion between the lid portion and the flange portion.
12 is a diagram for explaining a method of measuring the seal strength.
13 is a graph showing changes in tensile stress to the distance between the pair of jaws pulling the test piece to measure the seal strength.
It is a diagram showing the manufacturing process of FIG. 14A] lid.
It is a diagram showing the manufacturing process of FIG. 14B] lid.
It is a diagram showing the manufacturing process of FIG. 14C] lid.
It is a diagram showing the manufacturing process of FIG. 14D] lid.
It is a diagram showing FIG. 15 the container manufacturing process.
16 is a diagram showing a manufacturing process of the container.
17 is a diagram showing a manufacturing process of the container.
18 is a plan view showing a modified example of the container.
Is a plan view showing a modification of FIG. 19 the container.
It is a diagram illustrating a modification of FIG. 20蒸通unit.
It is a diagram illustrating a modification of FIG. 21蒸通unit.
It is a diagram illustrating a modification of FIG. 22蒸通unit.
It is a diagram illustrating a modification of FIG. 23蒸通unit.
It is a diagram illustrating a modification of FIG. 24蒸通unit.
[25] is a view showing the measurement results in Example A1 of the first embodiment.
FIG. 26 is a graph showing the measurement results in Example A2 of the first embodiment.
FIG. 27 is a view showing the measurement results in Example A3 of the first embodiment.
FIG. 28 is a view showing the measurement results at 25 ° C. in Example A4 of the first embodiment.
FIG. 29 is a graph showing measurement results at 100 ° C. in Example A4 of the first embodiment.
FIG 30 is an external perspective view of a microwave oven container according to the second embodiment.
[FIG. 31A] is a plan view of a container for an electronic oven according to the second embodiment.
[FIG. 31B] is a sectional view of a container for an electronic oven according to the second embodiment.
[FIG. 31C] is a sectional view of a container for an electronic oven according to the second embodiment.
[FIG. 32A] is a plan view of the main body portion constituting the microwave oven container according to the second embodiment.
[FIG. 32B] is a sectional view of the main body portion constituting the microwave oven container according to the second embodiment.
[FIG 33 is a plan view showing a microwavable container of the comparative embodiment.
It is a sectional view showing a lid in FIG. 34 modification.
[FIG. 35A] is a plan view showing a modified example of the planar shape of the main body portion.
[FIG. 35B] is a plan view showing a modified example of the planar shape of the main body portion.
[FIG. 35C] is a plan view showing a modified example of the planar shape of the main body portion.
It is a plan view showing a modification of the planar shape of FIG. 35D] body portion.
It is a plan view showing a modified example of FIG. 36 outer seal portion.
It is a plan view showing a modification of the position of FIG. 37 rafter part.
Is a diagram illustrating a modification of the seal embodiment of FIG. 38A] rafter seal.
It is a diagram illustrating a modification of the seal embodiment of FIG. 38B] rafter seal.
It is a diagram illustrating a modification of FIG. 39A]蒸通unit.
It is a diagram illustrating a modification of FIG. 39B]蒸通unit.
It is a diagram illustrating a modification of FIG 39C]蒸通unit.
Is a diagram illustrating a modification of FIG. 39D]蒸通unit.
[FIG. 40] is a plan view showing a container in the third embodiment.
[FIG. 41] is a sectional view showing the case taken along XXXXI-XXXXI line container shown in Figure 40.
[FIG. 42] is a sectional view showing an example of the layer structure of the main body and the laminated body constituting the lid.
[43] is a sectional view showing another example of the layer structure of the main body portion and the laminated body constituting the lid.
[FIG. 44] is a sectional view showing another example of the layer structure of the main body portion and the laminated body constituting the lid.
[FIG. 45] is a diagram for explaining a method for measuring tensile strength.
[FIG. 46] is a diagram for explaining a method for measuring tensile strength.
[FIG. 47] is a diagram for explaining a method of measuring tear strength.
[FIG. 48] is a diagram for explaining a method of measuring tear strength.
[FIG. 49] is a diagram for explaining a method of measuring the bonding strength.
[FIG. 50] is a diagram for explaining a method of measuring the bonding strength.
[FIG. 51] is a diagram showing a manufacturing process of the container.
Housing portion of FIG. 52] container is a diagram showing a state communicating with the outside.
Is a diagram showing how to tear the Figure 53] container.
Is a plan view showing a modification of FIG. 54] container.
Is a plan view showing a modification of FIG. 55] container.
[FIG. 56] is a plan view showing a container in the fourth embodiment.
[FIG. 57] is a sectional view showing the case taken along XXXXXVII-XXXXXVII line container shown in Figure 56.
DESCRIPTION OF THE INVENTION
[0052]
　 First Embodiment
　Referring to FIGS. 1 to 17, a description will be given of a first embodiment. In the accompanying drawings to the present specification, for convenience of easy understanding and illustration, the scale and aspect of the dimensional ratio and the like, are exaggerated appropriately changed from those of the real.
[0053]
　Also, as used herein, identifies the shape and geometric conditions and the degree thereof, such as "parallel", the "orthogonal", terms and the length of such "identity" and angle values ​​or the like, exact meaning without being bound, and interpreting including range that can expect a similar function.
[0054]
　Figure 1 is a plan view showing a container 1 according to this embodiment. Further, FIG. 2A is a cross-sectional view showing a case where the container 1 shown in Figure 1 taken along line II-II. Container 1 includes a body 10 accommodating portion 101 for accommodating the contents are formed, a lid 20 joined to the main body portion 10 so as to cover the accommodating portion 101, a. Some of the lid portion 20, 蒸通 portion 30 for discharging to the outside of the housing portion 101 of steam generated in the housing section 101 is formed by the contents are heated.
[0055]
　In the present specification, the term "bonding" is a concept including both welding and adhesion. The term "welding", by at least partially melting at least one of body portion 10 or the lid portion 20, which means that mounting the cover portion 20 to the main body portion 10. Also the "glue" is such an adhesive, by using a separate component from the main body portion 10 and lid 20, which means that mounting the cover portion 20 to the main body portion 10.
[0056]
　Contents contained in the main body portion 10 includes at least water. Examples of the contents, for example, retort foods, such as frozen foods and refrigerated foods can be mentioned. Further, contents, such as fish fillets or dried fish, may contain relatively few water.
[0057]
　The following describes the main body portion 10 and lid 20.
[0058]
　[Main body]
　As shown in FIGS. 1 and 2A, the body portion 10 includes a body portion 11 that defines a housing portion 101, a flange portion 12 extending outwardly from the upper portion of the body portion 11, a. Body part 11 includes, for example, a bottom portion 11a, and a side 11b provided upright from the bottom portion 11a so as to spread over one circumference along an outer edge of the bottom portion 11a, a. The flange portion 12 is connected over one circumference on the top of the body portion 11. Lid 20 is disposed on an upper surface of the flange portion 12. Although not shown, when the rigidity of the main body portion 10 is low, sometimes the body portion 11 and the flange portion 12 is partially curved.
[0059]
　Incidentally, the container herein, terms such as "bottom", "side", "top", a state where the housing portion 101 of the main body portion 10 the container 1 so as to open upward is placed as a reference 1, the main body portion 10 is representative of the position and direction of the cover portion 20 and the components thereof. Further, the "outside" is the side away from the center of the housing portion 101 of the main body portion 10 in plan view. Further, "inside", is the side closer to the center of the housing portion 101 of the main body portion 10.
[0060]
　In this embodiment, the bottom portion 11a and the flange portion 12 having a substantially rectangular outline. For example, the flange 12 includes a first edge 13 and second edge 14 facing each other, a first edge 13 and third edge 15 and fourth edge 16 extending between the second edge 14 ,including. The first edge 13 and second edge 14 extends in the first direction D1 parallel to each other and face each other in the second direction D2 crossing the first direction D1. The third edge 15 and fourth edge 16, parallel to each other, extend in a second direction D2 crossing the first direction D1, also face each other in the first direction D1. In the example shown in FIG. 1, the second direction D2 orthogonal to the first direction D1. Note that "parallel" means that the angle between the direction of the direction and the other edge one edge extends extends is 20 ° or less. Further, the "cross" means that the angle formed between the direction in which the direction and the other edge one edge extends extends is larger than 20 °.
[0061]
　As shown in FIG. 1, the corner portion of the flange portion may have an arcuate shape which is chamfered to be convex outward. Although not shown, the corner portion of the flange portion may have an angular shape that is not chamfered. Further, the contour and the contour of the flange portion 12 of the bottom 11a, may be a similar shape, it may not be similar.
[0062]
　As shown in FIG. 1, on the upper surface of the flange portion 12, the cover portion 20 for covering the accommodating portion 101 of the main body portion 10 are joined through the outer seal portion 18. Incidentally, as long as the outer sealing portion 18 is continuous over one circumference of the flange portion 12, the flange portion 12 is not required to be joined to the lid portion 20 over the entire area, the flange portion 12 is not joined to the lid 20 non-sealing portion may also be present.
[0063]
　In Figure 1, reference numeral S1 is the maximum distance between the inner edge of the outer seal portion 18 which faces in the first direction D1, i.e., along the inner edge of the outer seal portion 18 along the third edge 15 to the fourth edge 16 to the inner edge of the outer seal portion 18 represents the maximum distance in the first direction D1. In the example shown in FIG. 1, the maximum distance S1 is between the inner edge of the third edge 15 of the inner edge and the fourth edge 16 of the flange 12, equal to the maximum distance in the first direction D1. Further, reference numeral S2 is the maximum distance between the inner edge of the outer seal portion 18 which faces in the second direction D2, i.e., the outer edge seal from the inner edge of the outer seal portion 18 along the first edge 13 along the second edge 14 to the inner edge of section 18, it represents the maximum distance in the second direction D2. In the example shown in FIG. 1, the maximum distance S2 is between the inner edge of the inner edge of the first edge 13 of the flange portion 12 and the second edge 14, it is equal to the maximum distance in the second direction D2.
[0064]
　In the example shown in FIG. 1, the maximum distance S1 is less than the maximum distance S2. The ratio of the maximum distance S2 for the maximum distance S1 (= S2 / S1), for example 1.0 or more and is 1.8 or less, may be 1.3 or more and 1.6 or less.
[0065]
　[Lid]
　As shown in FIGS. 1 and 2A, the lid portion 20, the sheet material for making the cover portion 20 (hereinafter, also referred to as cover material) by folding at folding portion 25 as a portion of the overlap It is configured. In the following description, the portions that overlap a portion of the lid 50 is folded back by the folding unit 25, referred to as a rafter part 23. As shown in FIG. 1, rafter 23, fourth edge of the one side of the edge (third edge of the edge portion 15 side of the flange portion 12) from the other side edge of the lid portion 20 (the flange portion 12 extend in the first direction D1 to section 16 side of the edge). As described later, the first direction D1 which rafter 23 extends is a direction parallel to the conveying direction T of the base member and lid member for constituting a main body portion 10 and lid 20 in the manufacturing process of the container 1 is transported it is.
[0066]
　The lid unit 20 includes a rafter part 23 described above, positioned so as to sandwich the rafter 23, and a first cover 21 and second cover 22, which is constituted by a lid member 50, a. The first cover part 21, than the rafter 23 in the second direction D2 is located on the first edge 13 side, the second lid 22, the second edge than the rafter 23 in the second direction D2 It is located on the 14 side. In the following explanation, the portion located on the first lid portion 21 side than the folded portion 25 of the cover member 50 constituting the rafter 23 and the first portion 27, the second cover portion 22 side of the folded portion 25 a portion located also referred to as a second portion 28. As shown in FIG. 2A, the first portion 27 and second portion 28, are integrally formed through a folded portion 25. In the present embodiment, as shown in FIG. 2A, the first portion 27 and the first lid portion 21 of the rafter part 23 are integrally formed, the second portion 28 and the second cover portion of the rafter 23 22 are integrally formed.
[0067]
　Rafter part 23 includes a rafter seal portion 24, a 蒸通 portion 30 formed on the rafter seal portion 24. Rafter seal portion 24, one side of the edge of the lid portion 20 (third edge of the edge portion 15 side of the flange portion 12) from the other side edge (the fourth edge 16 side of the flange portion 12 edge ) inner surfaces of a portion of the lid member 50 so as to extend in the first direction D1 is a sealing portion which is joined to. 蒸通 unit 30 includes, for example, a through hole 31 formed in the rafter seal portion 24 so as to penetrate the rafter 23. In the example shown in FIG. 1, the through hole 31 has a shape extending linearly along the first direction D1. By the through-hole 31 has a shape extending linearly, it is possible to reduce the size of the through hole 31 in the direction perpendicular to the first direction D1. Therefore, it is possible to reduce the width of the rafter seal portion 24 that is required to form the through hole 31.
[0068]
　Incidentally, in FIG. 2A, an example in which the through-holes 31 extend through both the first portion 27 and second portion 28 of the rafter 23, the invention is not limited to this, the through hole 31, At least one of the first portion 27 and second portion 28 of the rafter 23 and it is sufficient to penetrate. For example, as shown in FIG. 2B, the through hole 31, the second portion 28 through the first portion 27 may not pass through. Or, although not shown, the through-hole 31 is the first portion 27 penetrates through the second portion 28 may not pass through. When the through-hole 31 which penetrates only at least one of the first portion 27 and second portion 28 of the rafter 23, as compared with the case of penetrating both the first portion 27 and second portion 28, the packaging container 1 one through hole 31 of the container 1 when or staked or it can be suppressed that being caught in the through hole 31 of another container 1. Further, it is possible to suppress the like bacteria will be mixed from the through hole 31 in the container 1.
[0069]
　As shown in FIG. 1, rafter part 23 may extend in the first direction D1 at a first edge 13 than the center point 101C of the accommodating portion 101 of the main body portion 10. In other words, rafter part 23 may not overlap with a center point 101C of the accommodating portion 101 of the main body portion 10 in a plan view. Although not shown, rafter part 23 may extend in the first direction D1 so as to overlap the center point 101C of the accommodating portion 101 of the main body portion 10 in a plan view.
[0070]
　In Figure 1, reference numeral L1 represents between the inner edge of the outer seal portion 18 along the central point 101C and the first edge 13 of the housing portion 101 of the main body portion 10, the maximum distance in the second direction D2. Further, reference numeral L2 is between the inner edge of the outer seal portion 18 base 26 of the rafter 23 and along the first edge 13 represents the maximum distance in the second direction D2. If rafter part 23 are positioned in the first edge 13 than the center point 101C of the accommodating portion 101 of the main body portion 10, the maximum distance L2 is less than the maximum distance L1. On the other hand, if the rafter part 23 overlaps with the center point 101C of the accommodating portion 101 of the main body portion 10, the maximum distance L2 is equal to the maximum distance L1.
[0071]
　When the present inventors have conducted extensive studies, as shown in the examples below, if the rafter 23 is close or overlap the center point 101C of the accommodating portion 101 of the main body portion 10, the internal pressure of the containing portion 101 when the heightened, peeling of the rafter seal portion 24 or the outer seal portion 18 in the third edge 15 or on the fourth edge 16 and found that easily occurs. When the third edge 15 rafter seal portion 24 of the upper or on the fourth edge 16 or the outer seal 18 is peeled off before the rafter seal portion 24 around the 蒸通 section 30, the vapor of the containing portion 101 is 蒸通in section 30 it will go missing from the third edge 15 and fourth edge 16 without the outside. Therefore, in order to prevent the steam escapes from the third edge 15 and fourth edge 16 is preferably rafter part 23 is apart from the center point 101C of the accommodating portion 101 of the main body portion 10. On the other hand, rafter part 23 is too distant from the center point 101C of the accommodating portion 101 of the main body portion 10, it becomes difficult to applied pressure on rafter seal portion 24 around the 蒸通 portion 30. Considering these points, it is preferable to provide in a position away from the center point 101C of the rafter part 23 within a predetermined range. For example, it is preferable that L2 / L1 is 0.3 or more and 0.8 or less, and further preferably 0.3 or more and 0.6 or less.
[0072]
　(Base material)
　Next, a sheet material for forming the main body portion 10 (hereinafter, also referred to as base material) will be described layer structure of. As shown in FIG. 3, the bottom member 40 includes at least a first substrate 41.
[0073]
　When fabricating the main body portion 10 by a sheet forming method, as a material used for the first substrate 41, it can be undrawn polypropylene, unstretched plastic film such as an unstretched nylon used. The first substrate 41 may be composed of a single layer as shown in FIG. 3, it may include a plurality of layers as shown in FIG. For example, first substrate 41 is a coextruded sheet comprising a first layer 41a made of polypropylene, a second layer 41b made of EVOH or nylon, and a third layer 41c made of polypropylene. The EVOH, ethylene - vinyl alcohol copolymer. As shown in FIG. 5, the bottom member 40 may further comprise a thermoplastic resin layer 42 positioned on the inner surface 40x side of the first substrate 41. The material for the thermoplastic resin layer 42 may be, for example, unstretched polypropylene film, a polyethylene and these were blended resin. Sheet material constituting the base material 40, if provided with a first substrate 41 including the unstretched plastic film, the thickness of the sheet material is, for example, 150μm or more and 800μm or less.
[0074]
　Furthermore, the bottom member 40, which is at least uniaxially stretched, preferably the first base member 41 including the stretched plastic film is biaxially stretched, may be constituted by a sheet material and a thermoplastic resin layer 42 . In this case, as shown in FIG. 6, the bottom member 40 may further have a second substrate 43 located between the first substrate 41 and the thermoplastic resin layer 42. The layer structure of the base material 40 shown in FIG. 6, it is possible to use the same layer structure of the lid 50 to be described later. Sheet material constituting the base material 40, if provided with the first substrate 41 including the stretched plastic film, a thermoplastic resin layer 42, the thickness of the sheet material is, for example, 60μm or more and 200μm or less.
[0075]
　Note that the sheet forming method, after heating the sheet material softening is a method of forming a desired shape to the sheet by pressing a mold. Vacuum forming, pressure forming, vacuum pressure forming, or the like can be used press molding. It is also possible to prepare the body portion 10 in other ways, such as injection molding.
[0076]
　(Lid)
　will be described layer structure of the lid member 50 constituting the lid portion 20. Lid 50 comprises at least a first substrate 51 and the thermoplastic resin layer 53. 7, the lid member 50, the first substrate 51, an example having a printed layer 52 and the thermoplastic resin layer 53 is shown. First substrate 51 constitutes the outer surface 50y of the lid 50. The thermoplastic resin layer 53 constitutes the inner surface 50x of the lid 50. Printing layer 52, it can be provided between the first substrate 51 and the thermoplastic resin layer 53 can be provided on the surface of the inner surface 50x side of the first substrate 51. Inner surface 50x is a surface located on housing portion 101 side of the lid 20, the outer surface 50y is a surface located opposite the inner surface 50x.
[0077]
　First substrate 51, so prevents the lid 20 will extend upon opening the container 1, has a constant stiffness. For example, the first substrate 51 was at least uniaxially stretched, preferably includes a stretched plastic film is biaxially stretched. Examples of the material constituting the stretched plastic film, e.g., nylon (ONy), such as polyamide or polyethylene terephthalate (PET), can be used polyesters such as polybutylene terephthalate (PBT). These stretched plastic film may be configured as a gas barrier film transparent deposition layer is applied. Stretched plastic film included in the first base member 51 are preferably stretched along the first direction D1. For example, the stretching direction of the stretched plastic film included in the first substrate 51, the angle between the first direction D1 is preferably at most 45 degrees, more preferably not more than 30 degrees, 20 degrees or less and more preferably.
[0078]
　The thickness of the stretched plastic film of the first substrate 51 is appropriately set depending on the material used. For example, if the nylon is used as the material constituting the stretched plastic film of the first substrate 51, the thickness of the stretched plastic film of the first base member 51, 9 .mu.m or more and 50μm or less, is preferably 12μm or more and 25μm or less . A stretched plastic film has a tensile elongation less than 300% when measured according to JIS K 7127, it refers to preferably 200% or less film.
[0079]
　Printing layer 52 of the lid 50 is a layer printed on the first substrate 51 in order to grant or aesthetics or indicate product information on the container 1. Printing layer 52 expresses characters, numbers, symbols, graphics, pictures and the like. The material constituting the printing layer 52, it is possible to use ink and ink for flexographic printing for gravure printing.
[0080]
　Ink constituting the printed layer 52 includes a binder and a pigment. The binder includes, for example, a polyurethane. Polyurethane is a cured product and a polyol as a main agent, and an isocyanate compound as a curing agent is produced by reacting.
[0081]
　The thermoplastic resin layer 53 is a layer constituting the sealing portion of such outer seal 18 and the rafter seal portion 24 by melting. The material for the thermoplastic resin layer 53, it is possible to use one or more resins selected low density polyethylene, polyethylene such as linear low density polyethylene, polypropylene. The thermoplastic resin layer 53 may be a non-stretched film. The unstretched film, JIS K 7127 compliant and tensile elongation when measured by 300% or more, preferably refers to a film of 400% or more. The thermoplastic resin layer 53 may be a single layer or may be a multilayer. The thickness of the thermoplastic resin layer 53 is, for example, 30μm or more and 100μm or less.
[0082]
　Between the first substrate 51 and the thermoplastic resin layer 53 is printed layer 52 is provided, the adhesive layer comprising an adhesive resin layer and the adhesive may be provided. As the adhesive resin layer, low density polyethylene, medium density polyethylene, high density polyethylene, polyethylene such as linear low density polyethylene, copolymers of ethylene -α-olefin polymerized using a metallocene catalyst, an ethylene - vinyl acetate copolymer, ethylene - acrylic acid copolymer, ethylene - ethyl acrylate copolymer, ethylene - methacrylic acid copolymer, ethylene - methyl methacrylate copolymer, ethylene - ethylene maleic acid copolymer - not unsaturated carboxylic acid copolymer may be used singly or in combination of two or more resins selected from ionomer resin. The adhesive is produced from the first composition and the adhesive composition prepared by mixing the second composition comprising a curing agent and a solvent containing a main agent and a solvent. Specifically, the adhesive comprises a cured product main agent and the solvent in the adhesive composition is produced by the reaction. Polyol Examples of the main agent there may be mentioned an isocyanate compound as a as an example of the curing agent, examples of the adhesive, there may be mentioned a two-liquid reaction type adhesive of a two liquid reaction type adhesive or an ester of ether it can. The two-component reactive adhesive of ether, and the like polyether polyurethane. Polyether polyurethanes, polyether polyol as the main agent, and an isocyanate compound as a curing agent is a cured product produced by reacting. The two-component reactive adhesive of the ester, for example, and the like polyester polyurethane or polyester. Polyester polyurethane is a cured product and a polyester polyol as a main agent, and an isocyanate compound as a curing agent is produced by reacting. Further, as the main component, it may be used an acrylic polyol.
[0083]
　(First variant of the lid)
　, as shown in FIG. 8, the cover member 50 is further have a second substrate 54 which is located between the first substrate 51 and the thermoplastic resin layer 53 it may be. In the example shown in FIG. 8, second substrate 54 includes a print layer 52 provided on the first substrate 51, located between the thermoplastic resin layer 53.
[0084]
　Second substrate 54, like the first substrate 51, preferably, is at least uniaxially stretched, preferably includes a stretched plastic film is biaxially stretched. Examples of the material constituting the stretched plastic film can be formed of the same material as the first substrate 51. Stretched plastic film in the second substrate 54, as in the stretched plastic film of the first base member 51, it is preferable that the stretched along the first direction D1. For example, the stretching direction of the stretched plastic film in the second substrate 54, the angle formed between the first direction D1 is preferably at most 45 degrees, more preferably not more than 30 degrees, 20 degrees or less and more preferably.
[0085]
　In the example shown in FIG. 8, as the material constituting the stretched plastic film of the first substrate 51, it is possible to use polyethylene terephthalate, as the material constituting the stretched plastic film of the second substrate 54, the use of nylon can. In this case, the thickness of the stretched plastic film of the first base member 51, for example 9μm or more and 50μm or less, preferably 12μm or more and 25μm or less, the thickness of the stretched plastic film of the second substrate 54 is, for example, 9μm or more and 50μm or less, preferably 15μm or more and 25μm or less.
[0086]
　Between the first substrate 51 where the printed layer 52 is provided between the second substrate 54, and between the second substrate 54 and the thermoplastic resin layer 53, the adhesive resin layer or the above, the adhesive adhesive layer may be provided, including.
[0087]
　(Second variant of the lid)
　, as shown in FIG. 9, the lid member 50 may further have an intermediate layer 55 located between the first substrate 51 and the thermoplastic resin layer 53 . In the example shown in FIG. 9, the intermediate layer 55, a print layer 52 provided on the first substrate 51, located between the thermoplastic resin layer 53.
[0088]
　The intermediate layer 55 includes, for example, a gas barrier layer. The gas barrier layer, for example, vapor deposition layer of an inorganic oxide such as a metal oxide or silicon oxide, such as aluminum oxide may be provided. Besides, as a gas barrier layer, an ethylene - vinyl alcohol copolymer (EVOH), polyvinylidene chloride resin (PVDC) or, such as aliphatic polyamides such as nylon MXD6, may be provided a resin layer having a high gas barrier property . This allows the oxygen and water vapor is prevented from entering the interior of the container 1. The thickness of the intermediate layer 55 is, for example, 12μm or more and 25μm or less.
[0089]
　(Seal strength)
　In the container 1 according to this embodiment, the peeling rafter seal portion 24 around the蒸通portion 30 before the outer seal portion 18, the vapor from蒸通portion 30 escapes to the outside It is preferred. With this in mind, rafter seal portion 24 preferably has an easy peeling property. For example, the seal strength of the rafter seal portion 24 is lower than the seal strength of the outer seal portion 18.
[0090]
　Hereinafter, a method of measuring the seal strength of the seal strength and the outer sealing portion 18 of the rafter seal portion 24 will be described. The instrument can be used a tensile thermostatic with bath manufactured by Orientec Co. tester RTC-1310A.
[0091]
　First, a test piece cut out part of the container 1. Figure 10 is a diagram showing a first test strip 61 for measuring the sealing strength of the rafter seal portion 24. The first test strip 61, as shown by a frame of dashed line the symbol X is attached in FIG. 1, cut out a portion including a first lid portion 21, the second lid 22 and the rafter 23 of the lid 20 It can be obtained by. Figure 11 is a diagram showing a second test strip 62 for measuring the sealing strength of the outer seal portion 18. Partial second test strip 62, including the sign XI as is shown by a frame of dashed line, labeled, body portion 11 and the flange portion 12 and lid 20 joined to the flange portion 12 of the container 1 in Figure 1 obtained by cutting a. Width W of the seal portion of the first specimen 61 and second test specimen 62 (see FIG. 1) is 15 mm.
[0092]
　Figure 12 is a diagram for explaining a method of measuring the seal strength of the rafter seal portion 24 with the first test strip 61. First, (here the first lid portion 21 and the second lid 22) portions which are not joined in the first test strip 61 is gripped by the respective first gripper 71 and second gripper 72 of the instrument. Further, each of the gripper 71 and 72, pulled at 300 mm / min in opposite directions, to measure the maximum value of the tensile stress (see Fig. 13). In the example shown in FIG. 12, a direction to pull the grasper 71 and 72 are orthogonal to the surface direction of a portion which is joined by rafter seal portion 24 of the first test strip 61. Figure 13 is a graph showing changes in tensile stress to spacing S.
[0093]
　The three first specimen 61, the maximum value of the tensile stress is measured and the seal strength of the rafter seal portion 24 and the average value. At the start of tensioning, the spacing S between the gripper 71 and 72 are 20 mm, on leaving the tension, spacing S between grippers 71 and 72 is 40 mm.

claims

A container having a storage portion for storing contents,
　a body portion defining said housing portion, a body portion and a flange portion extending outwardly from the upper portion of the barrel,
　so as to cover the accommodating portion and the a lid that is bonded via the outer sealing portion to the flange portion of the main body portion, and a lid constituted by a lid member is folded back at the folding portion such that a portion overlapping,
　the lid a rafter part extending in the first direction together with the portion of the cover member overlaps to the other side of the edge from one side edge of the lid, positioned so as to sandwich the rafter part, is constituted by the lid a has a first lid and a second lid portion,
　the rafter part, the said cover member so as to extend in the first direction from one side edge of the lid to the edge of the other side a rafter seal portion inner surfaces of a portion is joined, on the rafter seal portion Anda蒸通portion including made through holes or cutouts,
　seal strength of the rafter seal portion is lower than the seal strength of the outer seal portion, the container.
[Requested item 2]
　Maximum distance between the inner edge of the outer seal portion facing in the first direction D1 is less than the maximum distance between the inner edge of the outer seal portion facing in a second direction perpendicular to said first direction, wherein a container according to claim 1.
[Requested item 3]
　The flange portion includes a first edge and a second edge opposing each other in a second direction perpendicular to the first direction,
　the rafter part, said the center point of the accommodating portion of the main body portion first and extends in the first direction at one edge side, the container according to claim 1 or 2.
[Requested item 4]
　Wherein represents the maximum distance L1 in the second direction, the first edge and the base of the rafter part between the outer seal portion inner edge of along the center point and the first edge portion of the accommodating portion of the main body portion If represents the maximum distance in the second direction between the inner edge of the outer seal portion along the part in L2, L2 / L1 is 0.3 or more and 0.6 or less, the container according to claim 3.
[Requested item 5]
　Seal strength of the rafter seal portion at 15mm width when the 25 ° C. is 12N or less, the container according to any one of claims 1 to 4.
[Requested item 6]
　The outer edge of the outer seal portion as an axis the minimum distance when connecting two points of the outer edge of the street outer seal portion the center point is A axes, perpendicular to the through axis A center point of the accommodating portion of the housing portion the axis connecting the two points when the B-axis of the length of the a-axis is shorter than the length of the B-axis,
　the rafter part, together across the accommodating portion, are provided along the B axis a container according to claim 1.
[Requested item 7]
　The ratio of the length of the B-axis to the length of the A-axis is 1.2 to 3.0 A container according to claim 6.
[Requested item 8]
　Bottom material constituting the body portion, the thermoplastic resin layer constituting the inner surface is located in the housing part side, has at least a base material laminated on the thermoplastic resin layer,
　wherein said base material the substrate comprises a stretched film, the container according to any one of claims 1 to 7.
[Requested item 9]
　It said bottom member further comprises a printed layer container according to claim 8.
[Requested item 10]
　The tensile strength of the base material is not less than 40 MPa, the vessel according to claim 8 or 9.
[Requested item 11]
　Further comprising, a opening means formed in the cover portion and the flange portion
　the tear strength of the body portion and the lid portion is not more than 15N, the container according to any one of claims 1 to 10.
[Requested item 12]
　The flange portion includes a first edge and a second edge extending parallel to each other,
　said opening means, in inner position than the outer seal portion extending along the first edge, the first edge the extending along part is configured to facilitate tearing the flange portion, the container according to claim 11.
[Requested item 13]
　Said opening means comprises at least a notch or scar group formed in the flange portion, the container according to claim 11 or 12.
[Requested item 14]
　Has a storage portion for storing contents, a and accommodating portion configured蒸通unit manufacturing method of the container with a so as to the housing part communicate with the outside when the pressure is increased,
　the field of the receiving portion and the body for forming a body portion preparation step of preparing a body portion and a flange portion extending outwardly from the upper portion of the body portion,
　and a step of filling the contents into the body portion of the body portion,
　the receiving portion preparing a lid for covering,
　the lid and a step of forming an outer edge seal portion bonded to the flange portion of the main body portion,
　the step of preparing the lid,
　the lid preparing a cover material for forming,
　and forming a rafter part by folding the lid in the folded portion such that a portion overlapping the lid member,
　the inner surface of the portion of the lid member in the rafter part a step of joining together to form a rafter seal portion
　The rafter seal portion, and a step of forming a outs through hole or cut forming the蒸通portion,
　the sealing strength of the rafter seal portion is lower than the seal strength of the outer seal portion, container Production method.
[Requested item 15]
　The body preparation step includes a step of preparing a base material for forming the body portion, and forming the body portion is subjected to draw forming on the base material, and according to claim 14 method of manufacturing the container.
[Requested item 16]
　The body base material for constituting a has a thermoplastic resin layer constituting the inner surface is located in the housing part side, base and material laminated to the thermoplastic resin layer, at least,
　the bottom member wherein the substrate comprises a stretched film, the manufacturing method of container according to claim 14 or 15.