JP2017128100A - Laminated body for lid material, lid material, distribution packaging container, distribution packaging body, and method for producing laminated body for lid material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminate for lid material which can prevent oxygen permeation at higher level, suppresses occurrence of punched slugs, and can effectively prevent tearing from a desired size, and to provide a lid material, a distribution packaging container, a distribution package and a method for producing a laminate for lid material which use the same.SOLUTION: There is provided a laminate 10 for lid material which has a base material film layer 1, a laminate adhesive layer 2 having heat resistance, a rigid film layer 3, a laminate adhesive layer 4 having gas barrier property and a sealant layer 5 laminated in order from the outside, where the rigid film layer 3 is a polystyrene resin, the laminate adhesive layer 4 having the gas barrier property is an epoxy resin composition formed from an epoxy resin and an amine curing agent, and the base material film layer 1 is an amorphous polyester film.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a laminate for a lid, a lid, a distribution packaging container, a distribution package, and a method for producing a laminate for a lid, and more specifically, a liquid formed on a bottom material formed in two communicating chambers, Alternatively, the present invention relates to a distribution package obtained by storing contents such as one or more kinds of paste-like foods and sealing the flange portion of the bottom with a lid.

2. Description of the Related Art Conventionally, a distribution package that can push out contents such as filled ketchup and sauce by folding and crushing a lid with one hand is known. This distribution package is a recess for accommodating contents in a lid having a fold line provided with a half-cut portion at the center of the surface of the lid material and a projection that forms a discharge port when folded. Has a structure in which a bottom material formed with a flange portion is joined.
In order to prevent the contents of the distribution package from being deteriorated by oxygen, an intermediate layer of the lid material is an ethylene-vinyl alcohol copolymer resin layer (hereinafter also referred to as an EVOH layer) having an oxygen barrier property. A coextruded composite film in which a polystyrene resin layer having good rigidity and a polyethylene resin layer having a sealing property are laminated by coextrusion is used.

For example, the layer structure of the lid of the distribution packaging container includes, from the outside, a copolymer polyester resin layer, an adhesive layer, a polystyrene resin layer, an adhesive layer, and an ethylene-vinyl acetate copolymer saponified resin (EVOH). ), A coextruded composite film having a configuration in which a layer, an adhesive layer, and a polyethylene resin layer are laminated (Patent Document 1).
Moreover, as another layer structure of the cover material of a distribution packaging container, from the outside, a polystyrene resin layer, an adhesive layer, an ethylene-vinyl acetate copolymer saponified resin (EVOH) layer, an adhesive layer, and a polyethylene type A coextruded composite film having a structure in which resin layers are laminated is disclosed (Patent Document 2).
For example, as a layer structure of the lid of the distribution packaging container, as a lid having an oxygen barrier layer without using an EVOH layer, from the outside, a base film layer, a laminate adhesive layer, a rigid film, a gas barrier property A laminated body for a lid material composed of a laminate adhesive layer and a sealant layer are disclosed (Patent Document 3).

Japanese Patent No. 4571835 Japanese Patent No. 4603309 JP 2013-188933 A

  However, when the base film layer is a biaxially stretched polypropylene film, the cut width of the half cut portion may be wider than a desired dimension when the lid material is thermoformed. Further, when the film has too much tear resistance of the base film layer, punching debris may be generated in the cross section of the punched lid member during punching.

  Accordingly, the object of the present invention is to solve the above-mentioned problems, prevent oxygen permeation at a higher level, suppress the occurrence of punching debris, and effectively prevent the half-cut portion from spreading beyond a desired dimension. It is an object of the present invention to provide a cover laminate, a lid using the same, a distribution packaging container, a distribution package, and a method for manufacturing the lid laminate.

  The above object is achieved by the present invention described below. That is, the present invention comprises a base film layer, a heat-resistant laminate adhesive layer, a rigid film layer, a gas barrier laminate adhesive layer, and a sealant layer laminated in this order from the outside. And the said rigid film layer is a polystyrene-type resin, The said laminate adhesive layer with a gas barrier property is an epoxy resin composition which consists of an epoxy resin and an amine-type hardener, and the said base film A layered product for a lid material, wherein the layer is an amorphous polyester film.

  The sealant layer is made of a high density polyethylene resin or a medium density polyethylene resin.

  Further, the lid for a distribution packaging container according to the present invention is a half cut in which the laminate for lid materials is formed from the outside to the rigid film layer at the center of the surface opposite to the sealant layer of the laminate for lid materials. It has a fold line having a portion and a protrusion that forms a discharge port when the fold line is folded.

  Moreover, the distribution packaging container of the present invention is a packaging container comprising the above-mentioned distribution packaging container lid and a bottom material having a flange.

  In addition, the distribution package of the present invention comprises a lid for the distribution packaging container and a flange in the bottom material that fills a liquid or paste-like content in the molding recess of the bottom material, It is characterized by being heat sealed as an end.

  Further, the method for producing a laminate for a lid material according to the present invention comprises forming a laminating adhesive having a gas barrier property on a polystyrene-based rigid film layer by a dry laminating method, and the laminating adhesive having the gas barrier property. A process of laminating a laminate with the sealant film facing the forming surface, and a laminate having heat resistance by dry lamination on one side of an amorphous polyester film formed by an inflation method as a base film layer An adhesive is formed, and the surface of the base film layer on which the heat-resistant laminate layer is formed is overlapped with the surface of the polystyrene-based rigid film layer on which the sealant film is not laminated facing each other. And a process.

  According to the present invention, when thermoforming, oxygen permeation can be prevented at a higher level, the occurrence of punching debris can be suppressed, and the laminate for a lid material excellent in notch dimension stability of a half cut part, and the same A lid, a distribution packaging container, a distribution packaging, and a method for manufacturing a lid laminate can be provided.

It is sectional drawing which shows one embodiment which is the laminated body for lid | cover materials used for the lid | cover material of this invention. It is sectional drawing which shows one embodiment of the cover material of this invention, Comprising: The half cut part is provided. It is sectional drawing which shows one embodiment which is a laminated body used for the bottom material of this invention. It is an external appearance perspective view which shows one embodiment which is a distribution package body of this invention.

Next, an embodiment of the invention will be described in detail.
FIG. 1 shows an embodiment which is a laminate for a lid material of the present invention.
A laminate 10 shown in FIG. 1 includes, from the outside, a base film layer 1, a heat-resistant laminate adhesive layer 2, a rigid film layer 3, a gas barrier laminate adhesive layer 4, and a sealant layer. 5 is laminated in this order.
Although the content of each layer is mentioned later, as an example, the base film layer 1 is an amorphous polyester film. The laminate adhesive layer 4 having gas barrier properties is an epoxy resin composition comprising an epoxy resin and an amine curing agent. The rigid film layer 3 is a polystyrene resin.
A laminate 10 shown in FIG. 1 has a sealant layer 5 bonded to the back surface of a rigid film layer 3 via a laminate adhesive layer 4 having a gas barrier property, and further, a heat-resistant laminate on the surface of the rigid film layer 3. Manufactured by bonding the base film layer 1 through the adhesive layer 2.

  FIG. 2 is a cross-sectional view showing an embodiment of the lid material of the present invention, which is provided with a half-cut portion. The lid member 20 shown in FIG. 2 has the same laminated structure as that of the laminate 10 shown in FIG. 1. The half cut portion 11 is formed by a cut formed in the thickness direction of the lid material 20 from the surface side of the base film layer 1 of the lid material 20 and extends to the rigid film layer 3.

  FIG. 3 shows a cross-sectional view of one embodiment of a laminate constituting the bottom material which is a member of the distribution packaging container of the present invention. The laminated body 30 shown in FIG. 3 has a layer configuration in which an outer layer 31, an intermediate layer 32 having a barrier property, and a sealant layer 33 are sequentially laminated from the outside. The bottom material is obtained by molding the laminate 30 into a shape having a flange portion that is in contact with and overlapped with the lid member 20 and a plurality of accommodating portions. As shown in FIG. 4, the lid 20 is heat-sealed to the bottom material 40 to constitute the distribution packaging container 50. When the lid member 20 is heat-sealed to the bottom member 40, the sealant layer 33 of the laminate 30 is brought into contact with the sealant layer 5 of the lid member 20.

  FIG. 4 shows an external perspective view of the distribution package 60 of the present invention. The lid member 20 has a half-cut portion 11 formed to extend linearly from one side of the long side to the other side at the center in the longitudinal direction of the surface. Moreover, it has the protrusion part 13 which is formed across the half cut part 11 and makes the laminated body 10 of the lid | cover material 20 protrude outward from the base film layer 1 of a surface partially. The protrusion 13 is a portion where when the distribution packaging container 50 is folded in a mountain fold along the half cut portion 11 of the lid member 20, the bending stress is concentrated on the protrusion 13 which is an opening portion and is torn and forms an opening. It is. Examples of the shape of the protrusion 13 include a quadrangular pyramid, a dome shape, and a cube. However, the shape may be any shape that can concentrate stress when the lid member 20 is bent, and is not limited to these shapes.

In one embodiment of the distribution package of the present invention, the contents are filled in the accommodating portion formed by the recess 16 of the bottom material 40 of the distribution packaging container 50 shown in FIG. Is hermetically sealed. The distribution package 60 can extrude the contents from the opening in which the lid 20 is folded into a mountain fold along the half-cut portion 11 and an opening is formed in the protrusion 13.
The larger the number of protrusions 13, the larger the amount of content per unit time that flows out from the opening. Therefore, it is preferable that the number of the protrusions 13 of the lid member 20 is plural. But the number of the protrusions 13 should just be at least one, and the number of protrusions is not ask | required.

Hereinafter, each layer which comprises the cover material of this invention is demonstrated in detail.
(Base film layer)
The base film layer 1 in the lid material is a layer disposed outside the lid material 20 and has a function of having printability and printing stability and also has a function of protecting the rigid film layer 3. . The base film layer 1 needs to be an amorphous polyester film. When it is an amorphous polyester film, it is possible to effectively prevent the cut width of the half-cut portion from expanding beyond a desired dimension when the lid material is thermoformed. This is because it is considered that the half cut portion of the laminate is prevented from spreading from a desired position because the dimensional variation during the heat forming is small. As the amorphous polyester film, for example, an amorphous polyethylene terephthalate film, an amorphous polybutylene terephthalate film, or the like can be used. Any of an unstretched film and a stretched film can be used as these films. Among these, an unstretched film is preferable from the viewpoint of tear resistance.
The film may be produced by any film such as extrusion film formation, inflation film formation, coating film, etc., but inflation film formation is particularly preferable. This is a polyester-based blown film produced by using a blown film method and has a larger tear resistance than a biaxially stretched polypropylene film. For this reason, the cut direction of the half-cut part of the cover material manufactured using the said base film is difficult to spread the dimension of a half cut from a desired dimension at the time of post-processing thermoforming.
In addition, it is preferable to give surface treatments, such as a corona treatment, to the adhesive surface of a base film layer.
The thickness is preferably selected from the range of 5 μm to 50 μm, and more preferably 8 μm to 40 μm.
If the base film layer 1 exceeds the above range, it is not preferable because it tends to be difficult to adjust the half-cut of the lid. Moreover, since it exists in the tendency which cannot be printed stably as the base film layer 1 is less than said range, it is unpreferable.

(Print layer)
The printed layer printed on the back surface of the base material film layer 1 of the lid 20 is mainly composed of one or more ordinary ink vehicles, and, if necessary, a plasticizer, a stabilizer, an oxidation agent. One or more additives such as an inhibitor, a light stabilizer, an ultraviolet absorber, a curing agent, a crosslinking agent, a lubricant, an antistatic agent, a filler, and the like are optionally added, and further, a dye / pigment, etc. The ink composition is prepared by sufficiently kneading with a solvent, a diluent and the like, and then the ink composition is used. For example, gravure printing, offset printing, letterpress printing, screen Using a printing method such as printing, transfer printing, flexographic printing, etc., a desired printing pattern consisting of characters, figures, symbols, patterns, etc. is printed on the front or back surface of the base film layer 1 described above. The printing layer according to the present invention can be formed It is kill things.

(Rigid film layer)
The rigid film layer 3 in the lid is a layer disposed in the middle of the lid 20 and has a role of imparting rigidity and openability to the lid. As the rigid film layer 3, it is necessary to use a film made of a polystyrene resin (hereinafter also referred to as PS) material.
For example, in the case of a polystyrene resin film, as a polystyrene resin constituting the rigid film layer, general-purpose polystyrene (hereinafter also referred to as GPPS), impact-resistant polystyrene (hereinafter also referred to as HIPS), styrene / butadiene block copolymer (butadiene). (Single compound) or a blend thereof. GPPS does not contain a rubber component and has the property of being extremely fragile. On the other hand, since HIPS is blended with a rubber component, it has a property that it is difficult to break. Therefore, by appropriately controlling the blend ratio of GPPS and HIPS, it is possible to adjust the openability generated in the lid material when the package is opened.
In addition, it is preferable to give surface treatments, such as a corona treatment, to the adhesion surface of a rigid film layer.
The thickness of the rigid film layer 3 is preferably selected from a range of 50 μm to 500 μm, more preferably 200 μm to 400 μm.
If the thickness of the rigid film layer 3 exceeds the above range, an unnecessarily large force is required for folding when opening the package, which is not preferable because the cost increases. Moreover, when the rigid film layer 3 is less than the above range, when opening the package, good openability cannot be obtained, which is not preferable.

(Laminate adhesive layer with gas barrier properties)
The laminating adhesive layer 4 having a gas barrier property in the lid member has a function of adhering the rigid film layer 3 and the sealant layer 5 and also functions as an oxygen gas barrier layer.
The laminate adhesive layer 4 having gas barrier properties needs to be an epoxy resin composition composed of an epoxy resin and an amine curing agent.
The epoxy resin used in the present invention may be a saturated or unsaturated aliphatic compound, alicyclic compound, aromatic compound, or heterocyclic compound.

  Specifically, an epoxy resin having a glycidylamino group derived from metaxylylenediamine, an epoxy resin having a glycidylamino group derived from 1,3-bis (aminomethyl) cyclohexane, and a glycidylamino derived from diaminodiphenylmethane Epoxy resin having glycidylamino group or glycidyloxy group derived from paraaminophenol, epoxy resin having glycidyloxy group derived from bisphenol A, epoxy having glycidyloxy group derived from bisphenol F Resins, epoxy resins having a glycidyloxy group derived from phenol novolac, epoxy resins having a glycidyloxy group derived from resorcinol, etc. can be used. Epoxy resin having glycidylamino group derived from xylylenediamine, epoxy resin having glycidylamino group derived from 1,3-bis (aminomethyl) cyclohexane, epoxy resin having glycidyloxy group derived from bisphenol F And epoxy resins having a glycidyloxy group derived from resorcinol are preferred.

Amine-based curing agent is a reaction product of metaxylylenediamine or paraxylylenediamine as a curing agent, and a polyfunctional compound having an acyl group that can form an amide group site by reaction with polyamine to form an oligomer. Or a product of reaction with a monovalent carboxylic acid having 1 to 8 carbon atoms or a derivative thereof.
Examples of the polyfunctional compound having an acyl group that can form an amide group site by reaction with the polyamine to form an oligomer include acrylic acid, methacrylic acid, maleic acid, fumaric acid, succinic acid, malic acid, tartaric acid, adipine Examples thereof include carboxylic acids such as acid, isophthalic acid, terephthalic acid, pyromellitic acid, trimellitic acid, and derivatives thereof, such as esters, amides, acid anhydrides, acid chlorides, and particularly acrylic acid, methacrylic acid and their derivatives. Derivatives are preferred. Examples of the monovalent carboxylic acid having 1 to 8 carbon atoms include formic acid, acetic acid, propionic acid, butyric acid, lactic acid, glycolic acid, benzoic acid and the like, and derivatives thereof such as esters, amides, Acid anhydrides, acid chlorides and the like can also be used.

  As a method of bonding the rigid film layer 3 and the sealant layer 5 using the laminate adhesive layer 4 having gas barrier properties, a dry laminating method can be exemplified. The laminate adhesive strength is preferably 6 N / 15 mm width or more. If the laminate adhesive strength is within the above range, the base film layer 1 and the rigid film layer 3 are cracked, and the sealant layer 5 is then stretched and gradually opened from the central portion, so that only the deformed portion is torn, and the contents Can be discharged, which is preferable. When the lid material is folded and opened when the laminate adhesive strength is less than the above range, the interlayer (laminated surface) between the rigid film layer 3 and the sealant layer 5 is peeled off, and the lid material tends to be unable to open well. It is not preferable. In order to obtain such a laminate adhesive strength, the adhesive layer is preferably 1 μm to 8 μm.

(Laminate adhesive layer)
The laminate adhesive layer 2 in the lid has a role of bonding the base film layer 1 and the rigid film layer 3 together.
As the laminate adhesive layer 2, a polyester-based adhesive can be used as the main agent, and an isocyanate-based two-component reactive adhesive can be used as the curing agent. The laminate adhesive layer 2 is preferably an adhesive layer having heat resistance. By using an adhesive layer having heat resistance, it is possible to suppress the occurrence of punching scraps when the lid member 20 is punched out from the sheet of the laminate 10 to a predetermined size. This is because, when the punching die is heated due to frictional heat at the time of punching, and when an adhesive layer having no heat resistance is used for the laminate adhesive layer 2, the laminate adhesive layer 2 is stretched at the time of punching. This is because it is considered that punching waste is generated as a result of not being able to cut well. The heat-resistant adhesive layer is an adhesive layer with a heat-resistant temperature of 120 ° C. or higher, which is harder than an adhesive layer that does not have heat resistance, and can be cut well with a punching die, suppressing punching debris it can. Specifically, a two-component curable urethane adhesive used for a retort pouch at 121 ° C. or higher can be used.
An example of a method for bonding the base film layer 1 and the rigid film layer 3 is a dry laminating method. The laminate adhesive strength is preferably 4 N / 15 mm width or more.

(Sealant layer)
The sealant layer 5 of the lid member 20 needs to be a heat-sealable layer. The sealant layer 5 is particularly high density polyethylene (HDPE) or medium density polyethylene resin (MDPE). In the conventional lid member 20, low density polyethylene (LDPE), linear low density polyethylene (LLDPE), or the like is used for the sealant layer 5. It turned out to be not enough. LDPE is fragile and is prone to fluffing and full opening. LLDPE tends to extend, and a film residue is likely to occur as a result of the film not being cut. When the plurality of protrusions 13 are formed on the lid member 20, the film breakage of the sealant layer 5 may not be particularly successful. High-density polyethylene (HDPE) or medium-density polyethylene resin (MDPE) has relatively low heat sealability compared to LDPE and LLDPE, but can be sufficiently heat-sealed and has good film cutting properties. It is.

  The density of the high density polyethylene resin or medium density polyethylene resin is in the range of 0.925 to 1.00. 0.925 to less than 0.94 are medium density polyethylene resins, and 0.94 or more are high density polyethylene resins. If it is less than 0.925, the film cutting property is poor, and if it exceeds 1.00, there is a possibility that inconvenience may occur in sealing property and moldability.

  The thickness of the sealant layer 5 is preferably 30 μm or more and 50 μm or less. Within the above-mentioned range, it is preferable because the cutting at the time of opening is good and good sealing properties can be maintained. If the thickness of the sealant layer 5 is less than the above range, it will be difficult to maintain good sealing properties, and if it exceeds the above range, it will be difficult to achieve good cutting at the time of opening the lid material. It is not preferable. In the case of MDPE, 30 to 50 μm, and in the case of HDPE, the heat resistance is high, and if it is too thick, it becomes difficult to form the protrusions 13, so 30 to 40 μm is preferable.

  The laminate for forming the lid member 20 described above can be manufactured by a dry lamination method. Further, when the front and back layers are bonded by the dry laminating method, the front and rear resin film layers can be freely selected and bonded. When bonded by the dry laminating method, the adhesive strength between the layers can be maintained at 4 N / 15 mm width or more, so when folding and opening the lid material, each layer is stretched without peeling between the layers, Since it can open gradually, it is preferable.

The lid member 20 is manufactured by, for example, half-cutting the laminated body 10, forming the protrusion 13 toward the outer side of the container by thermoforming at a temperature of 170 ° C. to 220 ° C., and cutting it at a predetermined position. be able to.
The shape of the protrusion 13 is intended to cause bending stress to concentrate on the opening when the container lid member is bent, the opening being torn and the contents popping out. Examples of the shape of the protrusion 13 include a quadrangular pyramid shape, a semicircular shape (dome shape), and a cube.
By forming the half-cut portion, the lid member can be easily opened. The half-cut portion is preferably formed to be approximately 10% to 90% of the rigid film layer 3.
A half cut part can make a continuous cut | interruption in the same direction as the direction where a cover material bends. Moreover, you may make a cut into a dotted line shape about 2 mm-10 mm only in the vertex part of the protrusion 13. FIG.

The distribution package 60 according to the present invention has a recess 16 that fills the contents at the center, and the lid 20 and the bottom 40 are heat-sealed at the peripheral flange.
The material constituting the bottom material will be described. It is made of a resin film having moldability, and has a layer structure in which an outer layer 31, an intermediate layer 32 having a barrier property, and a sealant layer 33 are sequentially laminated from the outside.

(Outer layer of bottom material)
First, as the outer layer 31 having moldability, a resin film that can be thermoformed such as vacuum / pressure forming can be used. For example, polystyrene resin, polycarbonate resin, polyolefin resin such as polyethylene and polypropylene, polyvinyl chloride resin, acrylic or methacrylic resin, acrylonitrile resin, acrylonitrile-butadiene-styrene copolymer, acrylonitrile-styrene A film of a resin such as a copolymer, a polyester resin, a polyamide resin, a polyacetal resin, or the like can be used. The film may be any of an unstretched film and a stretched film. Further, the thickness is preferably 10 μm or more and 300 μm or less, and more preferably 20 μm or more and 150 μm or less.

(Layer with printability of bottom material)
Next, in the present invention, the resin film having formability and printability has thermoformability such as vacuum / pressure forming as described above, and further has a printing pattern such as letters and figures. Furthermore, it is possible to use a resin film that is rich in printing pitch dimensional stability and can be a main material constituting the container. The above layers can be arranged in the outer layer or the intermediate layer. For example, polyester resins, polyamide resins, polycarbonate resins, polypropylene resins, polyacetal resins, modified resins of these resins, and films of other resins can be used. Thus, the film may be any of unstretched or stretched film, and the thickness is preferably 5 μm or more and 300 μm or less, more preferably 10 μm or more and 150 μm or less. In the present invention, among these, from the viewpoints of moldability, printability, printing pitch dimensional stability, etc., a polyethylene terephthalate film for molding and a polypropylene film by cast molding are the most desirable materials. In the present invention, a printed pattern can be formed on the surface of the resin film by a normal printing method such as gravure printing, offset printing, silk screen printing, or the like.

(Barrier layer of bottom material)
In the present invention, the intermediate layer 32 having a barrier property may be a resin film having thermoformability such as vacuum / pressure forming, and further having a barrier property against gas, water vapor and the like. it can. For example, a resin film such as a polyvinylidene chloride resin, a polyvinyl alcohol resin, a saponified ethylene-vinyl acetate copolymer, a polyacrylonitrile resin, or the like can be used. The thickness is preferably 5 μm or more and 50 μm or less, and more preferably 5 μm or more and 30 μm or less.

(Bottom sealant layer)
Next, in the present invention, as the sealant layer 33 of the bottom material, a resin film having moldability and heat sealability can be used. Resin films that have thermoformability such as vacuum / pressure forming, and that can be melted by heat and thermally fused to each other can be used. As the sealant layer of the bottom material, for example, low density polyethylene, medium density polyethylene, high density polyethylene, linear (linear) low density polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-acrylic acid or methacrylic acid Copolymer, ethylene-acrylic acid ester or methacrylic acid ester copolymer, ionomer resin, ethylene-propylene copolymer, acid-modified polyethylene resin or polypropylene resin, polyvinyl acetate resin, 4-methylpentene-1 Resin, polybutene-1 resin, and other resin films can be used. The thickness is preferably 5 μm or more and 300 μm or less, and more preferably 20 μm or more and 150 μm or less.

  In the present invention, in addition to the materials listed above, for example, other resin films or sheets satisfying properties such as light resistance, heat resistance, chemical resistance, oil resistance, hygiene resistance, and the like, Alternatively, a reinforcing resin film or sheet that satisfies the strength, firmness, waist, shape retention, etc. of the container can be selected and used. Cellophane, synthetic paper, etc. Can be used.

  Next, in the present invention described above, a method for producing a deep drawing packaging material using the above-described materials and combining them together will be described. As such a method, lamination as a normal packaging material is performed. It can be performed by a lamination method for producing a body, for example, a wet lamination method, a dry lamination method, a solventless dry lamination method, an extrusion lamination method, a T-die coextrusion lamination method, a coextrusion lamination method, and other methods. In the present invention, for example, an anchor coating agent such as isocyanate (polyurethane), polyethyleneimine, polybutadiene, or organic titanium can be used. Furthermore, in the present invention, polyurethane, polyester, epoxy, polyamito, poly (meth) acrylic, polyvinyl acetate, cellulose, polyacetal, and other laminating adhesives can be used. . In the present invention, if necessary, pretreatment such as corona treatment and ozone treatment can be optionally performed.

  Next, in the above-mentioned present invention, a thermoforming method for vacuum / pressure forming of the deep drawing packaging material produced as described above will be described. As the thermoforming method, for example, the deep drawing produced above is used. Examples thereof include a thermoforming method in which the packaging material is softened by heating and pressed against a mold by pressurization. Specifically, the packaging material for deep drawing is heated and softened, and then the packaging material is applied to a mold by vacuum forming or pressure forming, and at that time, a resin film having moldability and heat sealability is formed. The deep-drawn molded container according to the present invention can be manufactured by forming the container so as to be the inner surface of the container and having a flange portion for hermetically sealing the lid. In the present invention, the package according to the present invention can also be manufactured by molding with a continuous molding machine for both vacuum and pressure, and then filling the contents, sealing the lid material, trimming, and the like.

  The thermoforming method for producing the bottom material 40 by vacuum / compressing the laminate for the bottom material 40 will be described. As the thermoforming method, for example, the laminate produced above is heated and softened, and the process is performed. Examples of the method include a thermoforming method in which the material is pressed against a mold by pressure. Specifically, the laminated body is heated and softened, and then the laminated body is applied to a mold by vacuum forming or pressure forming, and at that time, a resin film having moldability and heat sealability is distributed and packaged. The bottom member 40 can be manufactured by forming the flange member 50 so as to have an inner surface of the cover member 50 and a flange portion that hermetically seals the lid member 20.

Next, a description will be given of a manufacturing method of the distribution packaging body 60 in which the content of the distribution packaging container 50 composed of the lid material 20 and the bottom material 40 is filled. As such a method, as described above, the inside of the housing portion of the bottom material 40 is included. In addition, for example, sauces, tartar sauce, dressing, jam, mayonnaise, ketchup, knead paste, mustard, sauce, and other liquid or paste foods, creams, emulsions, lotions, serums, shampoos, rinses, conditioners, hair dyes Filling with filling contents such as whitening cosmetics, liquids such as cosmetic oils, liquid pharmaceuticals such as ointments, liquid medicines such as ointments, etc., and then covering the flange 20 at the opening of the bottom 40 with the lid 20 Overlap and hermetically seal with heat-sealing surfaces facing each other, then, if necessary, outside the hermetically sealed package And trimming the periphery of the can to produce a dispensing package 60. Further, the liquid or paste-like material may contain a solid material within a range that does not clog the opening of the protrusion 13 when the distribution package 60 is folded and the content is pushed out. It is also possible to manufacture the distribution package 60 by performing molding using a continuous molding machine for both vacuum molding and pressure molding, and then successively filling the contents, hermetically sealing the lid material, trimming, and the like.

  In the distribution package 60 of the present invention, the protrusion 13 opens to form an opening by pinching the both ends in the longitudinal direction with fingers with the half cut portion of the lid member 20 as the center, and forming the opening. It can be pushed out of the dispensing package 60 from the opening.

Next, the present invention will be described more specifically with reference to examples.
Example 1
<Cover material>
First, as the rigid film layer 3, a polystyrene resin film (made by Denka Co., Ltd., trade name, DENKA HI sheet HIWHDS) having a thickness of 280 μm was used. One of the corona-treated surfaces was coated by a gravure roll coating method and applied. Gas barrier laminate adhesive 4 (Mitsubishi Gas Chemical Co., Ltd. “MAXIVE”, main agent M-100: non-bis A polyepoxy resin, curing agent C-115: polyamine resin) so that the amount is 4.0 g / m ² Next, a corona-treated surface of a 40 μm-thick high-density polyethylene film (trade name, HD, manufactured by Tamapoly Co., Ltd.) is used as the sealant film 5 on the surface of the laminating adhesive layer having gas barrier properties. The two surfaces were opposed to each other and laminated by a dry laminating method.
On the other hand, as the base film layer 1, a 25 μm-thick amorphous polyethylene film (trade name, SA-70, manufactured by Towa Processing Co., Ltd.) formed by an inflation method is used. A normal gravure ink composition was used, and a print layer was formed by printing a predetermined print pattern composed of characters, figures, symbols, patterns, etc. by a gravure printing method.
Next, a two-component curable urethane adhesive (trade name, main agent: RU-77T, manufactured by Rock Paint Co., Ltd., as a heat-resistant adhesive for laminating) on the printing surface of the base film layer 1, a curing agent: using H-7), formed such that the coating amount is 3.5 g / m ^2, then, laminating with the heat-resistant - to the plane of preparative adhesive layer, a polystyrene resin film laminated by the above The other corona-treated surfaces face each other and overlap each other, and then both are laminated by a dry lamination method to form a layer structure, an amorphous polyester film layer (25 μm) / printing layer / urethane-based laminate adhesive layer / Polystyrene resin film layer (280 μm) / Adhesive layer for gas barrier laminate / High density polyethylene film (40 μm) .

  Next, at a predetermined position of the lid for the distribution packaging container, the polystyrene resin film layer was cut to a depth of 50% of its thickness from the amorphous polyester film layer side, and a half cut was performed. Next, the cover material for the distribution packaging container subjected to the half cut was heat-molded by a mold forming method to form a protrusion 13 that forms a discharge port for discharging the contents.

<Bottom material>
As the bottom material 40, an unstretched coextruded laminated film of unstretched polyamide resin layer / ethylene-vinyl acetate copolymer saponified resin layer / low-density polyethylene resin layer (from Mitsubishi Plastics Co., Ltd. Name, Diamilon).

The bottom material 40 was deep-drawn to form a recess for storing the contents. After filling this concave portion with mayonnaise, the flange portion of the bottom material and the lid member 20 on which the protrusions 13 were formed were overlapped and heat-sealed. Then, it cut | divided into each distribution package, and the distribution package 60 concerning this invention was manufactured.
The obtained distribution package could prevent oxygen permeation at a higher level and effectively prevent tearing from a desired dimension when the lid was opened.

(Example 2)
Example 2 is an example in which the sealant layer 5 is a medium density polyethylene resin.
The layer structure was amorphous polyester film layer (25 μm) / printing layer / urethane-based laminate adhesive layer / polystyrene resin film layer (280 μm) / adhesive layer for gas barrier laminate / medium density polyethylene film (40 μm). .

(Comparative Example 1)
In Comparative Example 1, Example 1 was used except that a biaxially stretched polypropylene film (trade name, MF20, manufactured by Sun Tox Co., Ltd.) was used instead of the base film layer used in the lid material of Example 1. In the same manner, a distribution package was produced.
The layer structure of the lid material used was biaxially oriented polypropylene film layer (25 μm) / printing layer / urethane-based laminate adhesive layer / polystyrene resin film layer (280 μm) / gas barrier laminate adhesive layer / high-density polyethylene film ( 40 μm).

  About the lid | cover material of said Example and a comparative example, the measurement test of the cut width of a half cut, an opening test, interlayer strength, and oxygen permeability were evaluated. These measurement conditions, evaluation conditions, and methods will be described below.

<Measurement of cut width of half cut>
30 mm of half-cut part is cut from the base film layer side of the sample sheet, and two protrusions with a height of 2 mm are vertically formed in the sample sheet. After thermoforming, the width of the half-cut part is measured. The evaluation was made in stages, and the good or bad evaluation was made based on the presence or absence of a change in the cut width, and the poor or poor evaluation. In addition, the change (dimension) of the cut width is shown in parentheses.
Evaluation 3: Dimensional change before and after thermoforming of the cut width of the half cut part None at all Evaluation 2: Dimensional change of the cut width of the half cut part before and after thermoforming Less than 1 mm Evaluation 1: Before and after thermoforming of the cut width of the half cut part Dimensional change 1mm or more

<Opening test>
Cut the half-cut part from the base film layer side of the sample sheet, heat-mold two protrusions with a height of 2mm in the vertical direction, and fold the film of the protrusion when the sample sheet is folded and opened Was evaluated on a five-point scale according to the degree, and good or bad was evaluated according to the presence or absence of fuzz.
Evaluation 5: No film residue (fluffing) at the opening mouth Evaluation 4: Little film residue at the opening mouth (fluffing) Evaluation 3: Film residue at the opening mouth (fluffing) Slightly recognized Evaluation 2: Film residue at the opening mouth (fuzziness) (Fuzzing) recognized evaluation 1: film residue (fluffing) at the opening is noticeable

<Measurement conditions for interlayer strength>
A sample of the lid laminate was sealed from a flat seal under conditions of a seal temperature of 190 ° C., 3 kg / cm 2, and 1 second to prepare a sample.
A 15 mm-wide strip-shaped test piece was cut out from the lid material sample obtained above, and a base material film for the lid material by a tensile tester (Shimadzu Autograph: Type: AGS-50D) at a test speed of 50 mm / min. The interlayer strength between the layer 1 and the rigid film layer 3 and the interlayer strength between the rigid film layer 3 and the sealant film 5 were measured. The interlayer strength was expressed as N / 15 mm width.

<Judgment criteria for interlayer strength>
4: Interlaminar strength is 9 N / 15 mm width or more.
3: The interlayer strength is 6 N / 15 mm width or more and less than 9 N / 15 mm width.
2: The interlayer strength is 3.9 N / 15 mm width or more and less than 6 N / 15 mm width.
1: Interlaminar strength is less than 3.9 N / 15 mm.
The interlayer strength is desirably 6 N / 15 mm width or more, and 9 N / 15 mm width or more is particularly preferable.

<Measurement conditions for oxygen permeability>
Oxygen gas permeability measuring device (MOCON OX-TRAN2 /
20), and measured at a temperature of 23 ° C. and a humidity of 90% RH.

Table 1 shows the evaluation results of the half-cut incision width measurement test, the unsealing test, the interlayer strength, and the oxygen permeability.

About the distribution packaging body obtained in Example 1 of this invention, the punchability was also good and the favorable result was obtained in all the evaluation tests.
On the other hand, about the distribution package of the comparative example 1, there existed samples which spread more than a desired dimension in the dimensional change before and after thermoforming of the cut width of the half cut.

DESCRIPTION OF SYMBOLS 1 Base film layer 2 Laminate adhesive layer 3 Rigid film layer 4 Laminate adhesive layer with gas barrier property 5 Sealant layer 10 Laminated body 11 Half cut part 12 Bending line 13 Protrusion part 14 Joint edge part 16 Recessed part 20 Lid material 30 Lamination | stacking Body 40 Bottom material 31 Outer layer 32 Intermediate layer having barrier property 33 Sealant layer 50 Distribution packaging container 60 Distribution packaging body

Claims (6)

From the outside, a base film layer, a laminate adhesive layer, a rigid film layer, a gas barrier laminate adhesive layer, and a sealant layer are laminated in this order,
And the said rigid film layer is a polystyrene-type resin,
And the laminate adhesive layer having the gas barrier property is an epoxy resin composition comprising an epoxy resin and an amine curing agent,
And the base film layer is an amorphous polyester film,
And the laminated body for lid | cover materials characterized by the said laminated adhesive layer being a laminated adhesive which has heat resistance.   The laminate for a lid material according to claim 1, wherein the sealant layer is made of a high density polyethylene resin or a medium density polyethylene resin.   A fold line having a half-cut portion formed from the outer side to the rigid film layer in the center of the surface opposite to the sealant layer of the lid material laminate according to claim 1 or 2, A lid for a distribution and packaging container, comprising: a protrusion that forms a discharge port when the bending line is bent.   A distribution packaging container comprising a lid member and a bottom member having a flange, wherein the lid member is the lid member for a distribution packaging container according to claim 3. The lid for a distribution and packaging container according to claim 3,
A distribution packaging body comprising: a flange in a bottom material filled with liquid or paste-like contents in a molding recess of the bottom material; and a heat sealing as a joining end portion thereof. A laminate adhesive having a gas barrier property is formed on a polystyrene-based rigid film layer by a dry lamination method, and a sealant film is laminated on the formation surface of the laminate adhesive having a gas barrier so as to face each other. Process,
A laminate adhesive having heat resistance is formed on one side of an amorphous polyester film formed by an inflation method, which is a base film layer, by a dry lamination method, and the heat resistance laminate of the base film layer is formed. And a step of superposing and laminating the surface of the polystyrene-based rigid film on which the surface of the polystyrene-based rigid film which is not laminated is opposed to the surface on which the layer is formed.

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