Technical field
[0001]
　The present invention is a sealant film, a laminated film and a packaging bag using the same.
BACKGROUND
[0002]
　Conventionally, food, beverages, as a packaging container for storing contents, such as pharmaceuticals, for example, the packaging bag is widely used consists of a laminated film in which a substrate sheet and the sealant film comprising a resin film or paper which are laminated It is. Furthermore, deterioration due to oxygen contents, in order to suppress a decrease due to external dissipation of the contents, further or laminated gas barrier film, or by imparting a gas barrier property to the substrate sheet, the permeability of the laminated film It is lowered.
[0003]
　On the other hand, a sealant film which is in contact with the contents (in particular, polyolefin-based films, etc.), the contents (especially medicinal ingredients, etc. aroma component) is adsorbed or absorbed, which or reduces the amount of the contents by the quality degradation there is also a problem of (for example, see JP 2015-137130 (Patent Document 1)).
[0004]
　Incidentally, JP-A-2010-6985 (Patent Document 2), structural units derived from dicyclopentadiene-based compounds, a tetracyclododecene compound-derived structural unit and a structural unit derived from a norbornene-based compound in a specific ratio hydrogenated products of ring-opening copolymer comprising the excellent solution stability during manufacturing, also the molding material containing the hydrogenated product as a resin component having high transparency, high moisture resistance, and moderate heat resistance There has been disclosed.
CITATION
Patent Document
[0005]
Patent Document 1: JP 2015-137130 Patent Publication
Patent Document 2: JP 2010-6985 JP
Summary of the Invention
Problems that the Invention is to Solve
[0006]
　To suppress the adsorption or absorption of the contents into the sealant film as a material of the sealant film, EVOH (ethylene-vinyl alcohol copolymer resin), medicinal components such as PET (polyethylene terephthalate) resin, polyacrylonitrile (PAN) , contents, such as aroma components have been studied to use an adsorbed or absorbed hardly low absorptive materials. However, these materials, or poor low-temperature sealability, the sealing strength is disadvantageously insufficient or.
[0007]
　The present invention has been made in view of the above problems, and an object thereof is to provide a sealant film having excellent low adsorbing property, and sufficient low-temperature sealability and seal strength.
Means for Solving the Problems
[0008]
　[1]
　and the polyolefin layer containing as a main component a polyolefin,
　and a polycycloolefin layer containing polycycloolefin as a main component as an outermost layer, a sealant film,
　said polycycloolefin is derived from dicyclopentadiene-based compound structural units (a), structural units derived from tetracyclododecene compound (B), and includes two or more structural units selected from structural units derived from norbornene compound (C),
　the polycycloolefin glass transition temperature of at 80 ° C. or less, the sealant film.
[0009]
　[2]
　The polycycloolefin, structural units derived from dicyclopentadiene-based compound (A), structural units derived from tetracyclododecene compound (B), and comprises structural units derived from a norbornene-based compound (C) , sealant film according to [1].
[0010]
　[3]
　The glass transition temperature of the polycycloolefin is 40 ° C. or more, the sealant film according to [1] or [2].
[0011]
　[4]
　The dicyclopentadiene-based compounds tricyclo [5.2.1.0 2, 6 ] deca-3,8-diene (dicyclopentadiene synonymous) or a derivative thereof, wherein tetracyclododecene compound the tetracyclo [4.4.0.1 2,5 . 1 7,10 ] -3-a-dodecene or a derivative thereof, wherein the norbornene compound is bicyclo [2.2.1] hept-2-ene or derivatives thereof, in any one of [1] to [3] sealant film described.
[0012]
　[5]
　The polycycloolefin, the dicyclopentadiene-based compounds, a ring-opening metathesis polymer of the tetracyclododecene-based compound and the norbornene two or more compounds selected from compounds, carbon - carbon double double bond are hydrogenated, a sealant film according to any one of [1] to [4].
[0013]
　[6]
　and the base sheet,
　[1] the laminated film formed by laminating a, and the sealant film according to any one of to [5].
[0014]
　[7]
　In addition, by laminating the gas barrier film between the sealant film and the base sheet, the laminated film according to [6].
[0015]
　[8]
　The laminate film according to the thickness is 100μm or less, [6] or [7].
[0016]
　[9]
　[6] to a laminate film according to any one of [8], comprising the sealant film to each other are sealed so as to be fused, the packaging bag.
[0017]
　[10]
　and the polyolefin layer containing polyolefin,
　and a polycycloolefin layer containing polycycloolefin as a main component as an outermost layer, a sealant film,
　said polycycloolefin, structural units derived from dicyclopentadiene-based compound (a), structural units derived from tetracyclododecene compound (B), and includes two or more structural units selected from structural units derived from norbornene compound (C),
　the glass transition of the polycycloolefin temperature is at 80 ° C. or less,
　the thickness of the polyolefin layer is not less 10μm or 40μm or less,
　the thickness of the polycycloolefin layer is 5μm or more 20μm or less, the sealant film.
[0018]
　[11]
　The polyolefin layer comprises said polycycloolefin mass for the following 50 wt% of the sealant film, the sealant film according to [10].
[0019]
　[12]
　and the polyolefin layer containing polyolefin,
　and a polycycloolefin layer containing polycycloolefin as a main component as an outermost layer, a sealant film,
　said polycycloolefin, structural units derived from dicyclopentadiene-based compound (a), structural units derived from tetracyclododecene compound (B), and includes two or more structural units selected from structural units derived from norbornene compound (C),
　the glass transition of the polycycloolefin temperature is at 80 ° C. or less,
　the thickness of the polycycloolefin layer (T2) is at 5μm or 10μm or less,
　the ratio of the thickness of the polyolefin layer to the thickness (T2) of the polycycloolefin layer (T1) (a) There is 3 to 9, the sealant film.
Effect of the invention
[0020]
　According to the present invention, it is possible to provide a sealant film having excellent low adsorbing property, and sufficient low-temperature sealability and seal strength.
BRIEF DESCRIPTION OF THE DRAWINGS
[0021]
FIG. 1 is a schematic sectional view showing a sealant film embodiment 1,2-1,3-1.
FIG. 2 is a schematic sectional view showing a sealant film of the second embodiment.
3 is a schematic sectional view showing a laminated film embodiments 3,2-2,3-2.
4 is a schematic cross-sectional view of a stacked film of the fourth embodiment.
5 is a schematic sectional view showing a laminated film embodiments 5,2-3,3-3.
6 is a schematic cross-sectional view of a stacked film of embodiment 6.
7 is a schematic sectional view of a stacked film of embodiment 7.
8 is a schematic sectional view of a stacked film of embodiment 8.
9 is a schematic cross-sectional view of a stacked film of embodiment 9.
It is a schematic cross-sectional view of a stacked film of FIG. 10 embodiment 10.
DESCRIPTION OF THE INVENTION
[0022]
　Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, like reference numerals designate the same or corresponding portions.
[0023]
　
　[Embodiment 1]
　With reference to FIG. 1, the sealant film 1 of this embodiment, two layers of polyolefin layer 11 (substrate sheet side) and polycycloolefin layer 12 (sealing side) it is composed of a sealant film.
[0024]
　(Polyolefin layer: substrate sheet side)
　polyolefin layer 11 comprises a polyolefin as a main component. Here, the term "comprises as a main component", for example, that is more than 50 wt% content of the polyolefin relative to the total amount of the polyolefin layer 11, the content of the polyolefin is preferably 80 mass% or more, more preferably is at least 90 mass% (hereinafter the same).
[0025]
　The polyolefin can be preferably used polyethylene. The polyethylene, for example, low density polyethylene (LDPE), can be suitably used, such as linear low density polyethylene (LLDPE).
[0026]
　(Polycycloolefin layer: sealing side)
　polycycloolefin layer 12 comprises a polycycloolefin as a main component. Incidentally, other polymeric materials such as disclosed in Patent Document 2, various additives may be blended.
[0027]
　Polycycloolefin includes dicyclopentadiene-based compounds, tetracyclododecene compounds, and, the structural units derived from norbornene more compounds selected from compound (cycloolefin monomer). That is, polycycloolefin, structural units derived from dicyclopentadiene-based compound (A), structural units derived from tetracyclododecene compound (B), and are selected from the structural unit derived from a norbornene compound (C) containing two or more structural units.
[0028]
　Preferably, polycycloolefin, structural units derived from dicyclopentadiene-based compound (A), structural units derived from tetracyclododecene compound (B), and comprises structural units derived from a norbornene-based compound (C).
[0029]
　Polycycloolefin is, structural units (A), if it contains (B) and (C), the ratio of structural units derived from dicyclopentadiene-based compound (A) is preferably from 5 to 80 mol%. The ratio of tetracyclododecene compound-derived structural units (B) is preferably 10 to 90 mol%. The ratio of the structural unit derived from a norbornene compound (C) is preferably from 5 to 50 mol%. Note that these ratios, the structural units (A), the ratio of when the total of 100 mol% of (B) and (C). In this case, polycycloolefin, structural units (A), may be contained within a range not impair the effects of the present invention the structural units other than (B) and (C).
[0030]
　The dicyclopentadiene-based compounds, e.g., dicyclopentadiene (tricyclo [5.2.1.0 2, 6 , etc.] deca-3,8-diene) and derivatives thereof. Derivatives of dicyclopentadiene, for example, 2-methyl dicyclopentadiene, 2,3-dimethyl-dicyclopentadiene, and 2,3-dihydroxy-dicyclopentadiene.
[0031]
　As the structural unit derived from dicyclopentadiene-based compound (A), for example, structural units derived from dicyclopentadiene.
[0032]
　The tetracyclododecene compounds, e.g., tetracyclo [4.4.0.1 2, 5 . 1 7,10 ] -3-dodecene and derivatives thereof. Tetracyclo [4.4.0.1 2,5 . 1 7,10 ] -3-Derivatives of dodecene, for example, 8-methyl tetracyclo [4.4.0.1 2, 5 . 1 7,10 ] -3-dodecene, 8-ethyl tetracyclo [4.4.0.1 2, 5 . 1 7,10 ] -3-dodecene, 8-ethylidene tetracyclo [4.4.0.1 2, 5 . 1 7,10 ] -3-dodecene, 8,9-dimethyl-tetracyclo [4.4.0.1 2, 5 . 1 7,10 ] -3-dodecene, 8-ethyl-9-methyl-tetracyclo [4.4.0.1 2, 5 . 1 7,10 ] -3-dodecene, 8-ethylidene-9-methyl-tetracyclo [4.4.0.1 2, 5 . 1 7,10 ] -3-dodecene, 8-methyl-8-carboxymethyl tetracyclo [4.4.0.1 2, 5 . 1 7,10 ] -3-dodecene, and the like.
[0033]
　As the structural unit derived from tetracyclododecene compound (B), for example, tetracyclo [4.4.0.1 2, 5 . 1 7,10 ] -3 include structural units derived from dodecene.
[0034]
　The norbornene compounds, for example, bicyclo [2.2.1] hept-2-ene (common name: norbornene) and derivatives thereof. Bicyclo [2.2.1] Derivatives of hept-2-ene, for example, 5-methyl - bicyclo [2.2.1] hept-2-ene, 5,5-dimethyl - bicyclo [2.2. 1] hept-2-ene, 5-ethyl - bicyclo [2.2.1] hept-2-ene, 5-ethylidene - bicyclo [2.2.1] hept-2-ene, 5-vinyl - bicyclo [ 2.2.1] hept-2-ene, 5-propenyl ruby ​​[2.2.1] hept-2-ene, 5-methoxycarbonyl - bicyclo [2.2.1] hept-2-ene, 5- Shianobishikuro [2.2.1] hept-2-ene, 5-methyl-5-methoxycarbonyl - bicyclo [2.2.1] hept-2-ene, and the like.
[0035]
　As the structural unit derived from a norbornene compound (C), include structural units derived from bicyclo [2.2.1] hept-2-ene.
[0036]
　Polycycloolefin is preferably polymerized ring-opening metathesis of the above cycloolefin monomer, is obtained by subsequently hydrogenating the C-C double bond. The preparation of such polycycloolefin can be performed based on the patent document 2.
[0037]
　The glass transition temperature of the polycycloolefin (Tg) of is at 80 ° C. or lower, preferably 75 ° C. or less. In this case, in addition to the non-absorptive, it is possible to obtain a sealant film having a proper seal strength and low-temperature sealability. Incidentally, Tg can be measured based on JIS K7121.
[0038]
　Since the Tg of the polycycloolefin there is a fear that the melted sealant film becomes the same as the room temperature, the Tg of the polycycloolefin is preferably 40 ° C. or higher, more preferably 50 ° C. or higher.
[0039]
　Sealant film 1, for example, can be produced as a film having a two-layer structure by 2-layer co-extruded above polyolefin layer (film-like semi-molded body) polycycloolefin layer (film-like semi-molded body) . The thickness of the sealant film 1 is preferably 100μm or less. The thickness of the sealant film 1 is preferably 10μm or more.
[0040]
　Sealant film 1 of the present embodiment is provided with the layer composed of a polycycloolefin having a structural unit derived from a specific two or more cycloolefin monomers as described above, the contents (medicinal component, aroma component are of non-adsorbing adsorption or absorption is suppressed such), and also has sufficient sealing strength and low-temperature sealability.
[0041]
　Incidentally, the polyolefin layer 11 which constitutes the sealant film 1 has a role to flexible films. Dicyclopentadiene-based compounds, polycycloolefin layer made of ring-opening metathesis polymer of tetracyclododecene compound and two or more compounds selected from the norbornene-based compound that's single layer film hard, Ya corona treatment the film is difficult, it is very difficult to manufacture as a packaging bag. Therefore, by using adjacent polyolefin layer 11 in polycycloolefin layer 12, it has become possible to manufacture a packaging bag by improving processability, the film suitability.
[0042]
　Respect cold sealability, specifically, for example, (an indication of sealable minimum temperature) rising temperature of the seal strength of the sealant film is preferably 120 ° C. or less. Incidentally, the rising temperature of the seal strength is measured by JIS Z0238 takes a level temperature.
[0043]
　Respect seal strength, particularly, the seal strength of the sealant film, 140 ° C., 0.2 MPa, at a sealing conditions of 1.0 seconds, is preferably 5.0 N / 15 mm or more. Incidentally, the seal strength is measured by JIS Z0238.
[0044]
　Also, the sealant film of the present embodiment is also excellent in moisture resistance. Respect moistureproof, specifically, the water vapor transmission rate of the thickness of 50μm following laminate film formed by bonding a base sheet of the sealant film and Nonbaria resistance, 5.0 g / (m 2 is a · 24h) or less it is preferable. The moisture permeability (water vapor permeability), based on JIS K7129A, 40 ℃, is measured under conditions of 90% RH.
[0045]
　[Embodiment 2]
　With reference to FIG. 2, the sealant film of the present embodiment, the blend layer 13 comprising a blend resin of polyolefin and polycycloolefin, provided between the polyolefin layer 11 and the polycycloolefin layer 12 except the point is the same as the first embodiment.
[0046]
　Blend layer 13, in making the elongated polycycloolefin layer 12, it is preferable that the recycling and polycycloolefin materials of the ends to be cut by the trimming. That is, the blend layer 13 is preferably composed of a blend resin of reproduction polycycloolefin and polyolefins.
[0047]
　By providing such a blend layer 13, even if the thickness of polycycloolefin layer 12 as compared with the case where there is no blend layer 13, it is possible to obtain the same effect. Therefore, it is possible to reduce the raw material cost of the polycycloolefin is a relatively expensive material.
[0048]
　
　[Embodiment 3]
　Referring to FIG. 3, the laminate film 2 of the present embodiment (packaging material), a sealant film 1 of the first embodiment, the adhesive layer 41, the substrate sheet 31, There is a laminated film obtained by laminating in this order.
[0049]
　The substrate sheet 31 is not particularly limited as long as it has a mechanical strength and dimensional stability, a plastic film, paper, nonwoven fabric or the like can be used. Examples of the material of the plastic film, a polyethylene terephthalate (PET), polyolefins such as polyester, polypropylene, polyethylene naphthalate, polystyrene, polyamides such as 6-nylon, polycarbonate, polyacrylonitrile, polyimide, and the like. Plastic film is preferably a biaxially oriented film. In the present embodiment, the base sheet 31 is a PET film.
[0050]
　As the adhesive constituting the adhesive layer 41 is not particularly limited, it may be suitably used for dry lamination adhesive. As the adhesive for dry lamination, two-component curing type urethane-based adhesive, a polyester urethane adhesive, polyether urethane adhesive, acrylic adhesive, polyester adhesive, polyamide adhesive, epoxy adhesive, etc. and the like. As the method for bonding the sealant film 1 and the gas barrier film 6 by using such adhesives include dry lamination.
[0051]
　Among the above adhesives can be suitably used excellent adhesion and the chemical composition of the content adhesive strength hardly reduced two-component curable adhesive. Two-component curable adhesive is made of a main agent and a curing agent, for example, two-component curable adhesive comprising a polyester polyol and a polyfunctional polyisocyanate.
[0052]
　Instead of the adhesive layer, anchor coating agent (two-component curable urethane adhesive, polyallylamine, etc.) or the like may be used.
[0053]
　The laminated film of the present embodiment is provided with the sealant film of the first embodiment, similarly to Embodiment 1, but the contents (medicinal component, aroma component, etc.) non-adsorbing adsorption or absorption is suppressed in There, and are also provided with adequate seal strength and low-temperature sealability, is also excellent in moisture resistance. Also in the embodiment 4-10 below, by providing a sealant film of the first embodiment, the same effect can be attained.
[0054]
　[Embodiment 4]
　Referring to FIG. 4, the laminate film 2 of the present embodiment, the sealant film 1 of the first embodiment, the extruded PE layer 51, the anchor coat layer 43, the base sheet 31 (PET film) When, but a laminate film which are laminated in this order.
[0055]
　On one side of the substrate sheet 31, an anchor coating agent (two-component curable urethane adhesive, polyallylamine, etc.) to form an anchor coat layer 43 by coating, the base sheet 31 and sealant film to melt the PE by coextruding 1 and can be manufactured laminated film 2.
[0056]
　[Embodiment 5]
　Referring to FIG 5, the laminated film of the present embodiment, deterioration due to oxygen gas content, in order to suppress a decrease due to external dissipation of the contents, it is laminated gas barrier films 6 to the intermediate except that is the same as the third embodiment. However, the gas barrier film 6 such as an aluminum foil having an adhesive layer 42 for adhering the sealant film 1.
[0057]
　As the gas barrier film 6, for example, aluminum foil. Besides, a film having a vapor-deposited aluminum film, or a film having an inorganic oxide deposited film can be used. Specifically, for example, polyester film, polypropylene film, those obtained by forming an aluminum deposited layer or an inorganic oxide deposited film in the stretched film such as nylon film can be used. Moreover, as a gas barrier film 6, an ethylene-vinyl alcohol copolymer film may be used.
[0058]
　As the adhesive constituting the adhesive layer 42, it is possible to use the same material as the adhesive layer 41. Note that the adhesive constituting the adhesive layer 42 and the adhesive constituting the adhesive layer 41 may be the same component, or may be different components.
[0059]
　[Embodiment 6]
　Referring to FIG. 6, the laminated film of the present embodiment, instead of the adhesive layer 42, except that extruded PE layer 51 and anchor coat layer 43 is laminated, similar to Embodiment 5 a laminated film.
[0060]
　[Embodiment 7]
　Referring to FIG. 7, the laminated film of the present embodiment, instead of the adhesive layer 41, except that the extruded PE layer 51 are stacked, a laminated film similar to that of Embodiment 5.
[0061]
　[Embodiment 8]
　Referring to FIG. 8, the laminated film of the present embodiment, instead of the adhesive layer 41, is extruded PE layer 51 are stacked, also, instead of the adhesive layer 42, extruded PE layer 52 and the anchor except that coating layer 43 is stacked is the same laminated film with embodiment 5.
[0062]
　[Embodiment 9]
　Referring to FIG 9, the laminated film of the present embodiment, the substrate sheet 33, except that it has a gas barrier property, which is similar to the laminated film and the third embodiment. In the present embodiment, the base sheet 33 is a PE resin film having gas barrier properties.
[0063]
　[Embodiment 10]
　Referring to FIG. 10, the laminated film of the present embodiment, instead of the adhesive layer 41, except that extruded PE layer 51 and anchor coat layer 43 is laminated, the same as in Embodiment 9 a laminated film.
[0064]
　
　using the laminated film formed as described above, to form a Seibukuro to packaging bag into a desired shape. For example, pillow-type packaging bag, mosquito jet type packaging bag, and self-standing packaging bag (see Patent Document 1), when prepared in accordance with the purpose (packaging bag designs, Contents and ease of use, etc.) good. Such packaging bag has at least two of the above laminated film, as the sealant film together are fused formed by sealing at least in part.
[0065]
　The content, for example, pharmaceuticals, quasi-drugs, foods, etc. beverage and the like. Packaging bag of the present embodiment, in particular medicinal properties, such as flavor components for the contents containing the (adsorbed or absorbed easily ingredients packaging bag, or be adsorbed or absorbed in the packaging bag component in question), it can be suitably used. Specifically, the packaging bag of the present embodiment, for example, percutaneous absorption agents or mouthwash containing medicinal ingredients, cosmetics containing aroma components such as perfumes, suitably used in order to accommodate the coffee can.
[0066]
　The present invention will hereinafter be described by examples in more detail, the present invention is not limited thereto.
[0067]
　(Example 1)
　as in Embodiment 3, two-component curable polyester substrate sheet and the sealant film of embodiment 1 were laminated through a polyurethane adhesive, to produce a laminated film.
[0068]
　The thickness of the substrate sheet (PET) is 12 [mu] m, the thickness of the sealant film is 30 [mu] m. The thickness of the adhesive layer is negligible.
[0069]
　Sealant film is made of a polyolefin layer and a polycycloolefin layer, the thickness of the polyolefin layer is 10 [mu] m, the thickness of the polycycloolefin layer is 20 [mu] m.
[0070]
　Substrate sheet, a polyethylene terephthalate (PET). Further, the polyolefin layer consists of linear low density polyethylene (LLDPE). Polycycloolefin layer comprises a polycycloolefin A below.
[0071]
　Polycycloolefin A:
　tricyclo [5.2.1.0 2, 6 ] deca-3,8-diene,
　tetracyclo [4.4.0.1 2, 5 . 1 7,10 ] -3-dodecene, and
　bicyclo [2.2.1] hept-2-ene
terpolymer of the three cycloolefin monomers consisting.
[0072]
　(Example 2)
　in sealant film, the thickness of the polyolefin layer is 15 [mu] m, except that the thickness of the polycycloolefin layer was 15 [mu] m, the same procedure as in Example 1 to prepare a laminated film.
[0073]
　(Example 3)
　in the sealant film, the thickness of the polyolefin layer and 20 [mu] m, except that the thickness of the polycycloolefin layer was 10μm, the same procedure as in Example 1 to prepare a laminated film.
[0074]
　(Example 4)
　and the polyolefin layer constituting the sealant film, the blend layer (a layer containing as a main component a blend resin of polyolefin and polycycloolefin), a three-layer structure formed by laminating a polycycloolefin layer in this order except a film, in the same manner as in example 1, to prepare a laminated film. The thickness of the polyolefin layer, the blend layer thickness, the thickness of the polycycloolefin layer are all 10 [mu] m.
[0075]
　(Example 5)
　as a polycycloolefin constituting the polycycloolefin layer of sealant film, except for using the polycycloolefin B below, in the same manner as in Example 1, to prepare a laminated film.
[0076]
　Polycycloolefin
　B: 2-methyl
　dicyclopentadiene, 8-methyl tetracyclo [4.4.0.1 2, 5 . 1 7,10 ] -3-dodecene,
　and 5-methyl - bicyclo [2.2.1] hept-2-ene
terpolymer of the three cycloolefin monomers consisting.
[0077]
　(Example 6)
　as a polycycloolefin constituting the polycycloolefin layer of sealant film, except for using the polycycloolefin C below, in the same manner as in Example 1, to prepare a laminated film.
[0078]
　Polycycloolefin
　C:
　2,3-dimethyl-dicyclopentadiene, 8-ethyl tetracyclo [4.4.0.1 2, 5 . 1 7,10 ] -3-dodecene,
　and 5,5-dimethyl - bicyclo [2.2.1] hept-2-ene
terpolymer of the three cycloolefin monomers consisting.
[0079]
　(Example 7)
　as a polycycloolefin constituting the polycycloolefin layer of sealant film, except for using the polycycloolefin D below, in the same manner as in Example 1, to prepare a laminated film.
[0080]
　Polycycloolefin
　D:
　2,3-dihydroxy-dicyclopentadiene, 8-ethylidene tetracyclo [4.4.0.1 2, 5 . 1 7,10 ] -3-dodecene,
　and 5-ethyl - bicyclo [2.2.1] hept-2-ene
terpolymer of the three cycloolefin monomers consisting.
[0081]
　(Comparative Example 1)
　as a polycycloolefin constituting the polycycloolefin layer of sealant film, except for using the polycycloolefin E below, in the same manner as in Example 1, to prepare a laminated film.
[0082]
　Polycycloolefin E:
　dicyclopentadiene, and,
　tetracyclododecene (tetracyclo [6.2.1.1 3, 6 .0 2, 7 ] dodeca-4-ene)
of the two cycloolefin monomers consisting of two terpolymer.
[0083]
　(Comparative Example 2)
　as a polycycloolefin constituting the polycycloolefin layer of sealant film, except for using the polycycloolefin F below, in the same manner as in Example 1, to prepare a laminated film.
[0084]
　Polycycloolefin
　F: 2-Methyl dicyclopentadiene
　and, 8-methyl tetracyclo [4.4.0.1 2, 5 . 1 7,10 ] -3-dodecene
binary copolymer of two cycloolefin monomers consisting.
[0085]
　(Comparative Example 3)
　a sealant film PET-based compound except that point a single layer film made of (PET1:: PET-G Tamapoly Co., Ltd.) in the same manner as in Example 1, to prepare a laminated film.
[0086]
　(Comparative Example 4)
　sealant film is a PET-based compounds: except a single layer film comprising (PET 2 Teijin Ltd.), in the same manner as in Example 1, to prepare a laminated film.
[0087]
　(Comparative Example 5)
　sealant film is a PET-based compounds: except a single layer film comprising (PET3 Toyobo Co., Ltd.) in the same manner as in Example 1, to prepare a laminated film.
[0088]
　(Comparative Example 6)
　(the ratio of the structural units of ethylene: 47 mol%) sealant film EVOH except that point a single layer film made of, in the same manner as in Example 1, to prepare a laminated film.
[0089]
　(Comparative Example 7)
　except the sealant film is a single layer film made of PAN (manufactured by Tamapoly Co., Ltd.), the same procedure as in Example 1, to prepare a laminated film.
[0090]
　
　As an evaluation test 1, were evaluated non-adsorbing.
[0091]
　Specifically, Examples 1-7 and each of the laminated films of Comparative Examples 1-7 was cut into a predetermined shape, the bag making machine two laminated films in a state in which the sealant film together is superposed so as to contact It was placed, by sealing a predetermined region, creating the three-way bag type packaging bag. In this time, the upper end of the packaging bag (top seal portion) has not yet been sealed for filling the contents.
[0092]
　Then the upper end of the packaging bag, tulobuterol (277 mg / m 2 ), l-menthol (2543Mg / m 2 ), methyl salicylate (2801Mg / m 2 ), and, DL-camphor (552 mg / m 2 either) was charged under a nitrogen atmosphere, the upper end of the packaging bag (top seal portion) by sealed and sealed contents. Note that these components are generally easily adsorbed to the sealant film components.
[0093]
　The packaging bag contents is accommodated as described above, were stored 1, 3 or 6 months in a thermostat bath maintained at 40 ° C.. And opening the packaging bag after storage, extracts each component by ethanol extraction of only sealant film in, the amount of each component extracted was determined by high performance liquid chromatography. Based on the measured values, and calculates the ratio of the remaining amount after the storage period for the initial amount as agents residual ratio (%). The measurement results of the drug residual ratio shown in Table 1.
[0094]
　
　as an evaluation test 2 were evaluated seal strength.
[0095]
　Specifically, the laminated film of each of Examples 1-7 and Comparative Examples 1-7 were sealed with a sealant film inside. Sealing conditions, the sealing temperature 140 ° C., and the sealing pressure 0.2 MPa, a seal time was 1.0 seconds. The peel strength of the two laminated film is sealed (N / 15 mm), the laminated film was cut into strips was measured according to JIS Z0238. The measurement results of the peel strength (seal strength) are shown in Table 1.
[0096]
　
　as an evaluation test 3, was evaluated low temperature sealability.
[0097]
　Specifically, the laminated film of each of Examples 1-7 and Comparative Examples 1-7, the sealing conditions, sealing pressure: 0.2 MPa, sealing time: 1.0 sec, while changing the sealing temperature, It was sealed in the same manner as the evaluation test 2. Then, the temperature at which the seal strength begins to increase on the basis of JIS Z0238, was obtained as a seal rising temperature.
[0098]
　
　as an evaluation test 4, were evaluated for moisture resistance.
[0099]
　Specifically, the laminated film of each of Examples 1-7 and Comparative Examples 1-7, based on JIS K7129 (A method), temperature 40 ° C., water vapor permeability tester under the conditions of humidity of 90% RH ( LYSSY manufactured by: L80-5000 type) was used to measure the moisture permeability. The measurement results of the moisture permeability shown in Table 1. Incidentally, as those values ​​of moisture permeability is low, the water vapor permeability is low, a high moisture resistance.
[0100]
　Table 1 shows the results of the above evaluation tests 1-4. Note that (polycycloolefin layer for Examples 1-7) Each sealant film used in Examples 1-7 and Comparative Examples 1-7 were measured in accordance with JIS K 7121 using a differential scanning calorimeter the combined glass transition temperature (Tg) of is shown in Table 1.
[0101]
[Table 1]

[0102]
　The results in Table 1, a copolymer of two or more specific cycloolefin polymer, a polycycloolefin layer containing polycycloolefin glass transition temperature (Tg) of 80 ° C. or less, laminated with a polyolefin layer laminated films of examples 1-7 using the sealant film is a body, excellent non-adsorptive and having a proper seal strength and low-temperature sealability, it can be seen that also has further moisture-proof.
[0103]
　In contrast, the Tg of Comparative Example 1 and 2 using the polycycloolefin exceeding 80 ° C., the sealing strength is low, sealing rising temperature is can be seen that high. In Comparative Example 3-5 using a single layer film composed of a PET-based compound as a sealant film, the moisture permeability is high, Comparative Example 4, further sealing strength is low, that the sealing rising temperature increases It can be seen. In Comparative Example 6 using a single layer film composed of EVOH as a sealant film, seal strength is low, sealing rising temperature is high, the moisture permeability becomes It can be seen high. In Comparative Example 7 using the single layer film composed of PAN as a sealant film, it can be seen that the moisture permeability is very high.
[0104]
　
　Additional sealant film I is the gamma-ray sterilization of the contents when used as a packaging bag (gamma-ray irradiation), discoloration (yellowing, bluish discoloration), odor (ethylene gas smell, etc. If the change in physical properties such as the occurrence of) occurs it has been found that there is.
[0105]
　Therefore, excellent low adsorbing property, have sufficient seal strength, and was further examined in order to provide a sealant film property change due to γ-ray irradiation was suppressed.
[0106]
　Hereinafter will be described with reference to the drawings. Incidentally, description overlapping sealant film I, and laminated films I and packaging bag I is omitted here.
[0107]
　[Embodiment 2-1]
　Referring to FIG. 1, the sealant film 1 of this embodiment, sealant film consisting of two layers of a polyolefin layer 11 (substrate sheet side) and polycycloolefin layer 12 (sealing side) it is.
[0108]
　(Polyolefin layer: substrate sheet side)
　polyolefin layer 11 comprises a polyolefin. The content of the polyolefin relative to the total amount of the polyolefin layer 11 is preferably not less than 50 wt%, more preferably 80 wt% or more, more preferably 90 mass% or more.
[0109]
　The polyolefin can be preferably used polyethylene. The polyethylene, for example, low density polyethylene (LDPE), can be suitably used, such as linear low density polyethylene (LLDPE).
[0110]
　The polyolefin layer may contain other materials other than polyolefins. Other materials, for example, include the same polycycloolefin and the main component of which will be described later polycycloolefin layer. Incidentally, polycycloolefin contained in the polyolefin layer is preferably a main component is polycycloolefin the same type of polycycloolefin polycycloolefin layer.
[0111]
　If the polyolefin layer contains a polycycloolefin, sealant film 1 as a whole with respect to the mass of the (total of the polyolefin layer 11 and the polycycloolefin layer 12), the mass of the polycycloolefin is 50 mass contained in the polyolefin layer 11 % by is preferably less. If the mass of the polycycloolefin is more than 50 wt%, there is a possibility that discoloration occurs bluish by gamma irradiation.
[0112]
　(Polycycloolefin layer: sealing side)
　polycycloolefin layer 12 comprises a polycycloolefin as a main component. Incidentally, "comprising as a main component", for example, the content of the polycycloolefin of the total amount of polycycloolefin layer 12 is that more than 50 wt%, the content of polycycloolefin is preferably 80 mass%, and more preferably not less than 90 mass%. Also, other polymeric materials such as disclosed in Patent Document 2, various additives may be blended.
[0113]
　Sealant film 1 of the present embodiment is provided with the layer composed of a polycycloolefin having a structural unit derived from a specific two or more cycloolefin monomers as described above, the contents (medicinal component, aroma component are of non-adsorbing adsorption or absorption is suppressed such), and has a sufficient sealing strength.
[0114]
　Respect seal strength, particularly, the seal strength of the sealant film, 140 ° C., 0.2 MPa, at a sealing conditions of 1.0 seconds, is preferably 5.0 N / 15 mm or more. Incidentally, the seal strength is measured by JIS Z0238.
[0115]
　In the present embodiment, the thickness of the polyolefin layer 11 is 10μm or more 40μm or less. The thickness of the polycycloolefin layer 12 is 5μm or more 20μm or less. The thickness of the polyolefin layer 11, and the thickness of the polycycloolefin layer 12 by designing such a range, it is possible to obtain a sealant film 1 changes in physical properties due to γ-ray irradiation was suppressed. The change in physical properties due to γ-ray irradiation, for example, discoloration (yellowing or bluish discoloration), such as the occurrence of odor (ethylene gas smell, etc.).
[0116]
　Incidentally, the thickness of each layer (polyolefin layer 11 and the polycycloolefin layer 12), after cutting the sealant film with a cutter or the like, the cut surface by observing with a microscope, can be measured by microscopic scale.
[0117]
　
　[Embodiment 2-2]
　Referring to FIG. 3, the laminate film 2 of the present embodiment (packaging material), a sealant film 1 of Embodiment 2-1, and the adhesive layer 41, substrate a seat 31, but is a laminated film obtained by laminating in this order. The thickness of the laminated film is preferably 100μm or less.
[0118]
　The laminated film of the present embodiment is provided with the sealant film of the embodiment 2-1, like the embodiment 2-1, the contents (medicinal component, aroma component, etc.) the non-adsorbed to the adsorption or absorption is suppressed in it is of gender, also with sufficient sealing strength and the like, and one in which property change due to γ-ray sterilization was suppressed.
[0119]
　[Embodiment 2-3]
　Referring to FIG 5, the laminated film of the present embodiment, deterioration due to oxygen gas content, in order to suppress a decrease due to external dissipation of the contents, the gas barrier film 6 is in the middle It is stacked. Other points are the same as in Embodiment 2-2. Note that the gas barrier film 6 such as an aluminum foil having an adhesive layer 42 for adhering the sealant film 1.
[0120]
　
　using the laminated film formed as described above, to form a Seibukuro to packaging bag into a desired shape. For example, pillow-type packaging bag, mosquito jet type packaging bag, and self-standing packaging bag (see Patent Document 1), when prepared in accordance with the purpose (packaging bag designs, Contents and ease of use, etc.) good. Such packaging bag has at least two of the above laminated film, as the sealant film together are fused formed by sealing at least in part.
[0121]
　The present invention will hereinafter be described by examples in more detail, the present invention is not limited thereto.
[0122]
　(Examples 2-1 to 2-12, Comparative Examples 2-1 to 2-8)
　in the same manner as in Embodiment 2-3, the substrate sheet 31, a gas barrier film 6, the sealant film 1 of Embodiment 2-1 When the two-component curable polyester, layered with the polyurethane adhesive to produce a laminate film 2 of example 2-1 to 2-12 and Comparative examples 2-1 to 2-8.
[0123]
　The base sheet 31 is made of polyethylene terephthalate (PET). The gas barrier film 6 is aluminum foil. The thickness of the base sheet 31 is 12 [mu] m, the thickness of the gas barrier film 6 is 7 [mu] m.
[0124]
　Sealant film 1 consists of a polyolefin layer 11 and the polycycloolefin layer 12, the thickness of the polyolefin layer 11, and the thickness of the polycycloolefin layer 12 is as shown in Table 2.
[0125]
　In Examples 2-1 to 2-10 and Comparative Examples 2-1 to 2-7, polyolefin (PO) layer comprises linear low density polyethylene (LLDPE). In Examples 2-11 and 2-12 and Comparative Examples 2-8, the polyolefin layer comprises LLDPE and the following polycycloolefin A. In Examples 2-11 and 2-12 and Comparative Example 2-8, the content of the polycycloolefin (PCO) to the total mass of the sealant film 1, respectively 50,30,60 wt%.
[0126]
　In Examples 2-1 to 2-12 and Comparative Examples 2-1 to 2-8, polycycloolefin (PCO) layer is composed of a polycycloolefin A below.
Polycycloolefin A:
　tricyclo [5.2.1.0 2, 6 ] deca-3,8-diene,
　tetracyclo [4.4.0.1 2, 5 . 1 7,10 ] -3-dodecene, and
　bicyclo [2.2.1] hept-2-ene
is terpolymer of the three cycloolefin monomers consisting opening these cycloolefin monomers metathesis copolymer, in which subsequently obtained by hydrogenating the C-C double bond.
[0127]
　
　For the above Examples 2-1 to 2-12 and Comparative Examples 2-1 to 2-8 were subjected to the following evaluation tests for the front and rear of γ-irradiation. The irradiation amount of γ-rays was to be a dose at common γ-rays sterilization 15 kGy.
[0128]
　(Evaluation Test 2-1)
　as evaluation test 2-1, were evaluated by colorimetry.
[0129]
　Specifically, the laminated film of each of Examples 2-1 to 2-12 and Comparative Examples 2-1 to 2-8, colorimeter: a ( "X-Rite" Video Jet X-Rite, Inc.) used, L value was measured a and b values. The measurement results are shown in Table 2.
[0130]
　(Evaluation test 2-2)
　as an evaluation test 2-2, were evaluated in the "seal strength".
[0131]
　Specifically, the laminated film of each of Examples 2-1 to 2-12 and Comparative Examples 2-1 to 2-8 were sealed with a sealant film inside. Sealing conditions, the sealing temperature 170 ° C., and the sealing pressure 0.2 MPa, a seal time was 1.0 seconds. The peel strength of the two laminated film is sealed (N / 15 mm), the laminated film was cut into strips, the peel strength was measured (seal strength) based on JIS Z0238. Incidentally, the seal strength, seal strength curve was measured at a stable position.
[0132]
　(Evaluation test 2-3)
　as an evaluation test 2-3, were evaluated "laminate strength".
[0133]
　Specifically, the laminated film of each of Examples 2-1 to 2-12 and Comparative Examples 2-1 to 2-8 were measured lamination strength between the sealant film and an aluminum foil.
[0134]
　Table 1 shows the results of the above evaluation tests 2-1 to 2-3. Incidentally, in the column "Evaluation" in the most right side of the table 2, "A" indicates that it is judged that there is no change in physical properties due to γ-ray irradiation, "NG" is a physical property change due to γ-ray irradiation has occurred indicating that it has been determined. Further, in the "Remarks" column, the contents of the change in physical properties due to γ-ray irradiation was described, including evaluation other than the above-mentioned evaluation tests 2-1 to 2-3.
[0135]
　In Examples for 2-1 to 2-12 and Comparative Examples 2-1 polycycloolefin layer used to to 2-8, the glass transition temperature was measured according to JIS K 7121 using a differential scanning calorimeter ( tg) of 70 ° C..
[0136]
[Table 2]

[0137]
　As can be seen from Comparative Example 2-1, when a polycycloolefin (PCO) layer is not yellowing by γ-ray irradiation, it is understood that such odor occurs.
[0138]
　Incidentally, the study of the present inventors, is already a copolymer of two or more of the specific cycloolefin polymer, a polycycloolefin layer containing polycycloolefin glass transition temperature (Tg) of 80 ° C. or less, laminated films of examples 2-1 to 2-12 using the sealant film is a laminate of a polyolefin layer is excellent in non-adsorbable, and has a proper seal strength and low-temperature sealing properties, further moisture resistance it has been found that also has. However, sealant film of Comparative Example 1, since there is no PCO layer was achieved, there is no non-adsorbing (low adsorptivity).
[0139]
　Further, the polyolefin (PO) layer 11 thickness of 50 [mu] m (40 [mu] m greater than) a is Comparative Examples 2-2 to 2-5, odor generated by γ-irradiation. On the other hand, in Comparative Examples 2-6 and 2-7 thickness of PCO layer is 30 [mu] m (20 [mu] m greater), bluish discoloration caused by irradiation γ rays.
[0140]
　In contrast, the thickness of the polyolefin layer is not less 10μm or 40μm or less, the thickness of the polycycloolefin layer 12 is 5μm or more 20μm or less, in Examples 2-1 to 2-10, occur occurrence of discoloration and odor There was no.
[0141]
　Therefore, the thickness of the polyolefin layer is at 10μm or 40μm or less, when the thickness of the polycycloolefin layer 12 is 5μm or more 20μm or less, change in physical properties (discoloration by γ-irradiation (yellowing or bluish discoloration), odor ( believed ethylene such as the occurrence of gas odor, etc.)) can be obtained a sealant film 1 is suppressed.
[0142]
　Also, if the polyolefin layer contains a polycycloolefin, with respect to the total mass of the sealant film, 60 wt% content of polycycloolefin contained polyolefin layer Comparative Example 2 is a (50 wt percent) In -8, discoloration bluish by γ-ray irradiation has occurred.
[0143]
　In contrast, with respect to the total mass of the sealant film, in Examples 2-11 and 2-12 a content of polycycloolefin contained polyolefin layer is 50 and 30 wt% (50 wt% or less) , it did not occur occurrence of discoloration and odor.
[0144]
　Therefore, if the polyolefin layer comprises a polycycloolefin, with respect to the total mass of the sealant film, the mass of the polycycloolefin contained polyolefin layer is considered preferable not more than 50 wt%.
[0145]
　
　Additional sealant film I is that it may not satisfy MAX strength required when used as a packaging bag (23N / 15 mm or higher) was found.
[0146]
　Therefore, excellent low adsorbing property and was further studied in order to provide a sealant film having a MAX strength of more than 23N / 15 mm.
[0147]
　Hereinafter will be described with reference to the drawings. Incidentally, description overlapping sealant film I, and laminated films I and packaging bag I is omitted here.
[0148]
　[Embodiment 3-1]
　Referring to FIG. 1, the sealant film 1 of this embodiment, sealant film consisting of two layers of a polyolefin layer 11 (substrate sheet side) and polycycloolefin layer 12 (sealing side) it is.
[0149]
　(Polyolefin layer: substrate sheet side)
　polyolefin layer 11 comprises a polyolefin. The content of the polyolefin relative to the total amount of the polyolefin layer 11 is preferably not less than 50 wt%, more preferably 80 wt% or more, more preferably 90 mass% or more. Incidentally, the polyolefin layer 11 may contain a material other than polyolefin.
[0150]
　The polyolefin can be preferably used polyethylene. The polyethylene, for example, low density polyethylene (LDPE), can be suitably used, such as linear low density polyethylene (LLDPE).
[0151]
　(Polycycloolefin layer: sealing side)
　polycycloolefin layer 12 comprises a polycycloolefin as a main component. Incidentally, "comprising as a main component", for example, the content of the polycycloolefin of the total amount of polycycloolefin layer 12 is that more than 50 wt%, the content of polycycloolefin is preferably 80 mass%, and more preferably not less than 90 mass%. Also, other polymeric materials such as disclosed in Patent Document 2, various additives may be blended.
[0152]
　Sealant film 1 of the present embodiment is provided with the layer composed of a polycycloolefin having a structural unit derived from a specific two or more cycloolefin monomers as described above, the contents (medicinal component, aroma component are of non-adsorbing adsorption or absorption is suppressed such), and has a sufficient sealing strength.
[0153]
　In the present embodiment, the thickness of the polycycloolefin layer 12 (T2) is 5μm or more 10μm or less. The ratio of the thickness of the polyolefin layer 11 to the thickness of the polycycloolefin layer 12 (T2) (T1) (a: T1 / T2) is 3 or more and 9 or less.
[0154]
　Incidentally, the thickness of each layer (polyolefin layer 11 and the polycycloolefin layer 12), after cutting the sealant film with a cutter or the like, the cut surface by observing with a microscope, can be measured by microscopic scale.
[0155]
　The thickness of the polyolefin layer 11 (T1), and the thickness of the polycycloolefin layer 12 (T2) By designing such a range, excellent low adsorbing property and sealants having MAX strength of more than 23N / 15 mm it is possible to obtain a film 1.
[0156]
　Here, the MAX strength, rather than the initial sealing strength, etc., a seal strength when the seal strength curve was stabilized reached a maximum. In retort standard (JIS Z0238), while it is determined MAX strength of 23N / 15 mm or more. Incidentally, the seal strength (MAX intensity) may be measured by JIS Z0238.
[0157]
　
　[Embodiment 3-2]
　Referring to FIG. 3, the laminate film 2 of the present embodiment (packaging material), a sealant film 1 of Embodiment 3-1, and the adhesive layer 41, substrate a seat 31, but is a laminated film obtained by laminating in this order. The thickness of the laminated film is preferably 100μm or less.
[0158]
　The laminated film of the present embodiment is provided with the sealant film of the embodiment 3-1, like the embodiment 3-1, the contents (medicinal component, aroma component, etc.) the non-adsorbed to the adsorption or absorption is suppressed in it is of gender, also with sufficient sealing strength and the like, and those having a MAX strength of more than 23N / 15 mm.
[0159]
　[Embodiment 3-3]
　Referring to FIG 5, the laminated film of the present embodiment, deterioration due to oxygen gas content, in order to suppress a decrease due to external dissipation of the contents, the gas barrier film 6 is in the middle It is stacked. Other points are the same as in Embodiment 3-2. Note that the gas barrier film 6 such as an aluminum foil having an adhesive layer 42 for adhering the sealant film 1.
[0160]
　
　using the laminated film formed as described above, to form a Seibukuro to packaging bag into a desired shape. For example, pillow-type packaging bag, mosquito jet type packaging bag, and self-standing packaging bag (see Patent Document 1), when prepared in accordance with the purpose (packaging bag designs, Contents and ease of use, etc.) good. Such packaging bag has at least two of the above laminated film, as the sealant film together are fused formed by sealing at least in part.
[0161]
　The present invention will hereinafter be described by examples in more detail, the present invention is not limited thereto.
[0162]
　(Examples 3-1 to 3-5, Comparative Examples 3-1 to 3-5)
　in the same manner as in Embodiment 3-2, the substrate sheet 31, a sealant film 1 embodiment 3-1, a two-liquid curable polyester, layered with the polyurethane adhesive to produce a laminated film of examples 3-1 to 3-5 and Comparative examples 3-1 to 3-5.
[0163]
　The base sheet 31 is made of polyethylene terephthalate (PET). The thickness of the base sheet 31 is 12 [mu] m.
[0164]
　Sealant film 1 consists of a polyolefin layer 11 and the polycycloolefin layer 12. Polyolefin (PO) layer comprises linear low density polyethylene (LLDPE).
[0165]
　Polycycloolefin (PCO) layer is composed of a polycycloolefin A below.
Polycycloolefin A:
　tricyclo [5.2.1.0 2, 6 ] deca-3,8-diene,
　tetracyclo [4.4.0.1 2, 5 . 1 7,10 ] -3-dodecene, and
　bicyclo [2.2.1] hept-2-ene
is terpolymer of the three cycloolefin monomers consisting opening these cycloolefin monomers metathesis copolymer, in which subsequently obtained by hydrogenating the C-C double bond.
[0166]
　The thickness of the polyolefin (PO) layer 11, and the thickness of the polycycloolefin (PCO) layer 12 is as shown in Table 3.
[0167]
　(Examples 3-6 ~ 3-12, Comparative Examples 3-6 ~ 3-12)
　In the same manner as in Embodiment 3-3, the substrate sheet 31, a gas barrier film 6, the sealant film 1 of Embodiment 3-1 When the two-component curable polyester, layered with the polyurethane adhesive to produce a laminated film of examples 3-6 - 3-12 and Comparative examples 3-6 ~ 3-12.
[0168]
　The base sheet 31 is made of polyethylene terephthalate (PET). The gas barrier film 6 is aluminum foil. The thickness of the base sheet 31 is 12 [mu] m, the thickness of the gas barrier film 6 is 7 [mu] m.
[0169]
　Sealant film 1 consists of a polyolefin layer 11 and the polycycloolefin layer 12. Polyolefin (PO) layer comprises linear low density polyethylene (LLDPE).
[0170]
　Polycycloolefin (PCO) layer is composed of the polycycloolefin A.
　The thickness of the polyolefin (PO) layer 11, and the thickness of the polycycloolefin (PCO) layer 12 is as shown in Table 3.
[0171]
　
　for the above Examples 3-1 to 3-12 and Comparative Examples 3-1 to 3-12 were evaluated in "seal strength" (MAX intensity).
[0172]
　Specifically, the laminated film of each of Examples 3-1 to 3-12 and Comparative Examples 3-1 to 3-12 and sealed by a sealant film inside. Sealing conditions, the sealing temperature 170 ° C., and the sealing pressure 0.2 MPa, a seal time was 1.0 seconds. The peel strength of the two laminated film is sealed (N / 15 mm), the laminated film was cut into strips, the peel strength was measured (seal strength) based on JIS Z0238. Incidentally, the sealing strength was measured the maximum at the point where the seal strength curve stable as MAX strength.
[0173]
　
　for the above Examples 3-6 - 3-12 and Comparative Examples 3-6 ~ 3-12 were evaluated for low adsorptivity.
[0174]
　Specifically, the laminated film of each of Examples 3-6 - 3-12 and Comparative Examples 3-6 ~ 3-12 cut into a predetermined shape, the two laminated films to contact with sealant film together placed on the bag-making machine in a state superimposed on, by sealing the predetermined area to prepare a 3-way bag type packaging bag. In this time, the upper end of the packaging bag (top seal portion) has not yet been sealed for filling the contents.
[0175]
　Then the upper end of the packaging bag, l-menthol was charged under a nitrogen atmosphere, the upper end of the packaging bag (top seal portion) by sealed and sealed contents. Note that this component is generally likely to be adsorbed to the sealant film component.
[0176]
　The packaging bag contents is accommodated as described above, 0, 1, 3 or 6 months (M) stored in a constant temperature bath maintained at 40 ° C.. And opening the packaging bag after storage, extracts each component by ethanol extraction of only sealant film in, the amount of each component extracted was determined by high performance liquid chromatography. Based on the measured values, and calculates the ratio of the remaining amount after the storage period for the initial amount as a residual ratio (%).
[0177]
　In Examples 3-6 - 3-12 and Comparative Examples 3-6 - 3-12 are gas barrier film (aluminum (AL) foil) is provided, it is possible to prevent the absorption to the substrate from the contents of , it is possible to evaluate the adsorptivity for sealant film.
[0178]
　Table 3 shows the results of the above evaluation tests 3-1 and 3-2. Incidentally, the column of "release surface", described the state of the surface peeling occurs in evaluation test 3-1 (release surface).
[0179]
　In Examples 3-1 - 3-12 and Comparative Examples 3-1 polycycloolefin layer used in the ~ 3-12, the glass transition temperature was measured according to JIS K 7121 using a differential scanning calorimeter ( tg) of 70 ° C..
[0180]
[table 3]

[0181]
　As shown in Table 3, the thickness of the polycycloolefin layer (T2) is at 5μm or 10μm or less, and the ratio of the thickness of the polyolefin layer (T1) to the thickness of the polycycloolefin layer (T2) (a) is is 3 to 9, in examples 3-1 to 3-12, it can be seen that 23N / 15 mm or more MAX strength is given.
[0182]
　In contrast, in Comparative Examples 1 to 8, 11 and 12 T2 and a (T1 / T2) is outside the above range, MAX strength is less than 23N / 15 mm.
[0183]
　This is because, as described in the section of the release surface of the Table 1, in Examples 3-1 to 3-12, by a certain extent the thickness of PCO layer is peeled off is started from the low strength PCO layer, for moving to the middle of high peel surface strength PO layer, presumably because the MAX strength is high.
[0184]
　On the other hand, as in Comparative Example 3-4,3-5,3-11 and 3-12, the thickness of the PCO layer becomes thick, peeling starting from PCO layer, the release surface is intact low strength PCO layer because it is in, is considered to MAX strength is not high. Also, as in Comparative Examples 3-1 to 3-3 and 3-6 to 3-8, even by reducing the PCO layer, if PO layer even thinner (if the ratio a is small), the release from the PCO layer start, be shifted to the middle of high peel surface strength PO layer, since the PO layer is not sufficiently extended, it believed MAX strength does not increase.
[0185]
　Also, from the evaluation results of low adsorptivity (residual ratio) for Examples 3-6 - 3-12, it is seen that the sealant film of the present invention is excellent in low adsorptivity. This sealant film is a copolymer of two or more specific cycloolefin polymer, a polycycloolefin layer containing polycycloolefin glass transition temperature (Tg) of 80 ° C. or less, the polyolefin layer This is because a laminate.
[0186]
　Incidentally, T2 is within the above range, in Comparative Examples 3-9 and 3-10 a (T1 / T2) is greater than 9, MAX strength although 23N / 15 mm or more, (in particular the contents when the concentration is increased,) low adsorptivity is can be seen that bad. This becomes large adsorption amount to the PO layer when PO layer becomes thick, believed to low adsorptivity it becomes worse.
[0187]
　From the above results, the thickness of the polycycloolefin layer (T2) is at 5μm or 10μm or less, and the ratio of the thickness of the polyolefin layer (T1) to the thickness of the polycycloolefin layer (T2) (a) is 3 or more If it is 9 or less, excellent low adsorbing property and, it is considered possible to obtain a sealant film 1 having a MAX strength of more than 23N / 15 mm.
[0188]
　Embodiments and examples have been disclosed herein are to be considered as not restrictive but illustrative in all respects. The scope of the invention is defined by claims rather than the above description, it is intended to include any modifications within the meaning and range of equivalency of the claims.
Industrial Applicability
[0189]
　Sealant film of the present invention can be used as the innermost layer of the laminated film constituting the packaging bag.
DESCRIPTION OF SYMBOLS
[0190]
　1 sealant film, 11 polyolefin layer, 12 polycycloolefin layer, 13 blend layer, 2 laminated film 31, 32 and 33 base sheet, 41 adhesive layer, 43 an anchor coat layer, 51 and 52 extruded PE layer, 6 gas barrier film.

The scope of the claims
[Requested item 1]
　A polyolefin layer containing a polyolefin as a main component,
　and a polycycloolefin layer containing polycycloolefin as a main component as an outermost layer, a sealant film,
　said polycycloolefin, structural units derived from dicyclopentadiene-based compound (a), structural units derived from tetracyclododecene compound (B), and includes two or more structural units selected from structural units derived from norbornene compound (C),
　the glass transition of the polycycloolefin temperature of 80 ° C. or less, the sealant film.
[Requested item 2]
　The polycycloolefin, structural units derived from dicyclopentadiene-based compound (A), structural units derived from tetracyclododecene compound (B), and comprises structural units derived from a norbornene-based compound (C), claim the sealant film according to 1.
[Requested item 3]
　Sealant film according to the glass transition temperature of the polycycloolefin is 40 ° C. or higher, according to claim 1 or 2.
[Requested item 4]
　The dicyclopentadiene-based compounds tricyclo [5.2.1.0 2, 6 a] deca-3,8-diene or a derivative thereof, wherein tetracyclododecene compounds are tetracyclo [4.4.0.1 2,5 . 1 7,10 ] -3-dodecene or a derivative thereof, wherein the norbornene compound is bicyclo [2.2.1] hept-2-ene or derivatives thereof, in any one of claims 1 to 3, sealant film described.
[Requested item 5]
　The polycycloolefin, the dicyclopentadiene-based compounds, a ring-opening metathesis polymer of the tetracyclododecene compound and two or more compounds selected from the norbornene compound, a carbon - carbon double bond It is hydrogenated, sealant film according to any one of claims 1 to 4.
[Requested item 6]
　A substrate sheet,
　a laminated film formed by laminating a sealant film according to any one of claims 1 to 5.
[Requested item 7]
　Further, formed by laminating a gas barrier film between the sealant film and the base sheet, the laminated film according to claim 6.
[Requested item 8]
　The thickness is 100μm or less, the laminated film according to claim 6 or 7.
[Requested item 9]
　The laminate film according to any one of claims 6-8, comprising the sealant film to each other are sealed so as to be fused, the packaging bag.
[Requested item 10]
　A polyolefin layer containing a polyolefin,
　and a polycycloolefin layer containing polycycloolefin as a main component as an outermost layer, a sealant film,
　said polycycloolefin, structural units derived from dicyclopentadiene-based compound (A) , structural units derived from tetracyclododecene compound (B), and includes two or more structural units selected from structural units derived from norbornene compound (C),
　the glass transition temperature of the polycycloolefin is 80 ℃ or less,
　the thickness of the polyolefin layer is not less 10μm or 40μm or less,
　the thickness of the polycycloolefin layer is 5μm or more 20μm or less, the sealant film.
[Requested item 11]
　The polyolefin layer comprises said polycycloolefin below 50% by weight based on the weight of the sealant film, the sealant film of claim 10.
[Requested item 12]
　A polyolefin layer containing a polyolefin,
　and a polycycloolefin layer containing polycycloolefin as a main component as an outermost layer, a sealant film,
　said polycycloolefin, structural units derived from dicyclopentadiene-based compound (A) , structural units derived from tetracyclododecene compound (B), and includes two or more structural units selected from structural units derived from norbornene compound (C),
　the glass transition temperature of the polycycloolefin is 80 ℃ or less,
　the thickness of the polycycloolefin layer (T2) is at 5μm or 10μm or less,
　the ratio of the thickness of the polyolefin layer to the thickness (T2) of the polycycloolefin layer (T1) (a) is 3 or 9 or less, the sealant film.