JP4170464B2 - Liquid paper container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention makes it easy to dispose of the laminated body constituting the container by separating it into a paper-based outer surface portion and a plastic-based inner surface portion with a release layer so that it can be easily discarded and reused resources. The present invention relates to a liquid paper container used for packaging sake, wine, coffee and the like.
[0002]
[Prior art]
Recently, environmental protection has been avoided, and the reuse of packaging materials has become a hot topic. Even for paper-type paper containers, paper containers for milk packaging made of polyethylene / paper / polyethylene laminates are recycled. Activities are carried out and effective use is made by reusing resources. However, it is necessary to use paper-type containers with excellent gas barrier properties for the protection of contents, the means of distribution, and the lengthening of the distribution period for the packaging of alcohol, wine, coffee, etc. In general, a laminate in which a gas barrier layer is laminated on the content side of the paper layer, for example, a laminate made of polyethylene / paper / adhesive resin / aluminum foil / adhesive / polyethylene terephthalate / polyethylene is generally used. ing. In the paper container composed of the laminated body having the above-described structure, the plastic composition in the laminated body is high in addition to the aluminum foil included in the laminated structure, and the used gobeltop-type paper container can be recycled. There was a problem that the recovery efficiency was low as well as being difficult. In addition, since the paper container is formed from a very rigid laminated body like the laminated body having the above configuration, the outer surface and the inner surface of the top part of the paper-belt type paper container like the paper container for milk packaging It is extremely difficult to reduce the bulk of the paper container by peeling off the adhesive portion and disassembling with scissors.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to make it possible to easily separate a laminate constituting a paper container into an outer surface portion made of polyethylene / paper / polyethylene and an inner surface portion containing a plastic having a metal layer or a metal oxide layer. Another object of the present invention is to provide a liquid paper container that can be easily disposed of and can effectively reuse resources.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the inventors of the present invention have a liquid paper container forming laminate according to the first aspect of the invention in order from the outer surface: a thermoplastic resin layer, a paper layer, an adhesive resin layer, a release layer, and a gas barrier layer. And a thermoplastic resin layer, and the gas barrier layer is a laminate of an aluminum foil and a biaxially stretched plastic film, or a biaxially stretched plastic film on which a metal or metal oxide is deposited, and the aluminum foil surface or the above A first release layer made of a resin containing shellac, which is configured such that the surface on which the metal or the metal oxide is deposited is located on the release layer side, and the release layer is located on the gas barrier layer side; The first release layer and the second release layer are composed of two layers, a second release layer made of a resin containing an ethylene-vinyl acetate copolymer located on the adhesive resin layer side. A release layer is a printed layer formed in order on the gas barrier layer surface, and is composed of a first laminated sheet comprising the thermoplastic resin layer and the paper layer, the release layer, the gas barrier layer, and the thermoplastic resin layer. The second laminated sheet is integrated with the adhesive resin layer, and is peeled off at the interface between the first release layer and the second release layer, and the thermoplastic resin layer, the paper layer, and the adhesive resin layer. And a laminated body configured to be separable into an inner surface portion mainly including the gas barrier layer and the thermoplastic resin layer.
[0005]
The invention according to claim 2 is the laminate for forming a liquid paper container according to claim 1, wherein the release layer is formed of a layer having a whole surface coat or an arbitrary pattern and having a layer area of 95 to 5%. It is characterized by being.
[0006]
The invention according to claim 3 comprises the laminate for forming a liquid paper container according to claim 1 or 2, and comprises a front plate, a rear plate, both side plates, a top forming plate, and a bottom forming plate. In the liquid paper container provided, an adhesive strength adjusting layer is partially formed in a region where the outer surfaces of the top forming plate and the bottom forming plate are thermally bonded to each other.
[0007]
According to a fourth aspect of the present invention, there is provided the liquid paper container according to the third aspect, wherein each of the side surface plates and the top portion forming plate connected to the upper and lower sides of the both side surface plates and the center portion of the bottom portion forming plate are folded in the vertical direction. It consists of the structure in which the curve was formed.
[0008]
Further, in the method for producing a laminate for forming a liquid paper container according to claim 5, a thermoplastic resin layer, a paper layer, an adhesive resin layer, a release layer, a gas barrier layer, and a thermoplastic resin layer are laminated in order from the outer surface, The gas barrier layer is a laminate of an aluminum foil and a biaxially stretched plastic film or a biaxially stretched plastic film on which a metal or metal oxide is deposited and the aluminum foil surface or the surface on which the metal or metal oxide is deposited Is disposed on the release layer side, and the release layer is made of a resin containing shellac located on the gas barrier layer side, and ethylene- located on the adhesive resin layer side. A method for producing a laminate for forming a liquid paper container comprising two layers with a second release layer comprising a resin containing a vinyl acetate copolymer, wherein the gas barrier A step of producing a first laminated sheet by sequentially printing and forming the first release layer and the second release layer on the gas barrier layer surface of a laminated film in which a layer and the thermoplastic resin layer are laminated, and the paper layer, Consists of a step of forming a laminate in which the paper layer of the second laminated sheet comprising the thermoplastic resin layer and the second release layer of the first laminated sheet are laminated by laminating the adhesive resin in a molten state. It is.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing the laminated structure of the first embodiment of the present invention, FIG. 2 is a cross-sectional view showing the laminated structure of the second embodiment of the present invention, and FIG. FIG. 4 is a partial perspective view showing a procedure for peeling and disassembling the adhesive portion between the outer surfaces of the bottom forming plates of the gobble top type container, and FIG. 5 is a perspective view showing a folded state of the gobble top type container. 6 is a perspective view showing a state in which an outer surface layer made of polyethylene, paperboard, and an adhesive resin starts to peel from the end of the container, FIG. 7 is a perspective view showing a state in which the outer surface layer is peeled over the entire length of the container, and FIG. It is a perspective view which shows the method of making the opportunity which peels an outer surface layer and an inner surface layer, 1 is a polyethylene layer, 2 is a paper layer, 3 is an adhesive resin layer, 4, 4a, 4b is a peeling layer, 5 is a gas barrier layer 6 is polyethylene layer, 7 and 8 are adhesive strength Adjustment layers, 11, 12, 13, and 14 are side plates, 11a, 12a, 13a, and 14a are top forming plates, 11b, 12b, 13b, and 14b are bottom forming plates, 15 is an adhesive plate, 16 and 17 are folding lines, Reference numeral 18 denotes a spout mounting hole, and 19 denotes a bottom edge bonding portion.
[0010]
As shown in FIG. 1, the laminated structure of the first embodiment of the liquid paper container of the present invention includes a polyethylene layer 1, a paper layer 2, an adhesive resin layer 3, a release layer 4, a gas barrier layer 5, and a polyethylene layer in order from the outer surface. 6. The printed pattern is provided on the outer surface of the polyethylene layer 1. The release layer 4 is formed of the entire surface or a layer having an arbitrary pattern and having 95 to 5% of the entire area. In the case of the first embodiment, the outer surface of the polyethylene layer 1 / paper layer 2 / adhesive resin layer 3 is easily peeled off at the interface between the adhesive resin layer 3 and the release layer 4 by loosening the end face of the laminate or the like. It can be easily separated into a part and an inner surface part composed of the release layer 4 / gas barrier layer 5 / polyethylene layer 6. The release layer 4 is peeled off while adhering to the gas barrier layer 5.
[0011]
As shown in FIG. 2, the laminated structure of the second embodiment of the liquid paper container of the present invention is, in order from the outer surface, a polyethylene layer 1, a paper layer 2, an adhesive resin layer 3, a release layer 4b, a release layer 4a, and a gas barrier layer. 5 and a polyethylene layer 6. The printed pattern is provided on the outer surface of the polyethylene layer 1. The release layer 4b and the release layer 4a are formed of the entire surface or a layer having an arbitrary pattern and having 95 to 5% of the entire area. In the case of the second embodiment, the polyethylene layer is easily peeled off at the interface between the release layer 4b and the release layer 4a or the interface between the adhesive resin layer 3 and the release layer 4b by loosening the end face of the laminate. 1 / an outer surface portion made of a paper layer 2 / adhesive resin layer 3 / peeling layer 4b, on the inner surface portion Do that because the peeling layer 4a / gas barrier layer 5 / polyethylene layer 6, or polyethylene layer 1 / paper layer 2 / adhesive an outer surface portion made of a resin layer 3, can be easily separated on the inner surface portion Do that because the peeling layer 4b / release layer 4a / gas barrier layer 5 / polyethylene layer 6. The shape of the liquid paper container produced by using the laminate of the first embodiment and the second embodiment is arbitrary such as a gobel top type or a flat top type (brick type).
[0012]
As the resin constituting the release layer 4 in the case where the release layer 4 is one layer as in the laminated configuration of the first embodiment, the aluminum foil surface constituting the gas barrier layer 5 or a biaxially stretched plastic film vapor-deposited with aluminum is used. Resins such as acrylic resins, butyral resins, urethane resins, polyamide resins, and shellacs that have good adhesion to the vapor deposition surface and poor adhesion to the adhesive resin layer 3 surface can be used. The release layer 4 is formed by gravure printing or the like on the aluminum foil surface constituting the gas barrier layer 5 or the vapor-deposited surface of the biaxially stretched plastic film on which aluminum is vapor-deposited, using a resin ink consisting of the above resin alone or a mixture. .
[0013]
As the resin constituting the release layer 4b and the release layer 4a in the case where the release layer is composed of the release layer 4b and the release layer 4a as in the laminated configuration of the second embodiment, the release layer 4a includes a gas barrier layer. The release layer 4b formed on the release layer 4a can be made of an acrylic resin, a polyamide resin, or a shellac having good adhesion to the aluminum foil surface constituting the aluminum 5 or the vapor-deposited surface of the biaxially stretched plastic film on which aluminum is deposited. The cellulose resin, acrylic resin, vinyl chloride-vinyl acetate copolymer resin, ethylene-vinyl acetate copolymer resin, EVA, which have good adhesion to the adhesive resin layer 3 and can be peeled off at the interface with the release layer 4a. Modified urethane resins can be used. The release layer 4a and the release layer 4b are formed by printing twice by gravure printing or the like on the aluminum foil surface constituting the gas barrier layer 5 or the vapor-deposited surface of the biaxially stretched plastic film on which aluminum is vapor-deposited. In addition, microcrystalline wax, silicon, or the like can be added to the release layers 4, 4a, 4b in order to obtain a desired peel strength.
[0014]
Low density polyethylene is used as the polyethylene layer 1, and low density polyethylene, medium low density polyethylene, linear low density polyethylene, ethylene-α olefin copolymer polymerized using a single site catalyst, etc. are used as the polyethylene layer 6. Is done. As the paper layer 2, a paperboard having a basis weight of 250 to 450 g / m ² is used. The adhesive resin layer 3 includes low density polyethylene, ionomer, ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid copolymer (EMAA), ethylene-methyl acrylate copolymer (EMA), ethylene-acrylic. An ethyl acid copolymer (EEA), an ethylene-methyl methacrylate copolymer (EMMA), or the like is used. As the gas barrier layer 5, a laminate of an aluminum foil having a thickness of 6 μm to 9 μm and a biaxially stretched polyethylene terephthalate film or a biaxially stretched nylon film, a biaxially stretched polyethylene terephthalate film or a biaxially stretched nylon film deposited with aluminum is used. used.
[0015]
The shape of the liquid paper container of the present invention is arbitrary, such as a gobel top type container or a flat top type container. As shown in FIG. 3, the blank plate for manufacturing the gobeltop type container has the side plates 11, 12, 13, 14 and the adhesive plate 15 connected to each other via a crease, and the side plates 11, 12. , 13, and 14 are connected to the top and bottom edges of the top plate 11a, 12a, 13a, 14a and the bottom plate 11b, 12b, 13b, 14b through creases, respectively. Folding lines 16 are formed in the vertical direction at the center, and folding lines 17 are formed in the vertical direction at the center portions of the top forming plates 12a, 14a and the bottom forming plates 12b, 14b, and the side plates 11, 12, 13, 14, and the top. The forming plates 12a, 13a, 14a or the bottom forming plates 11b, 12b, 13b, 14b are formed in a state excluding predetermined dimensions above and below the creases connecting the forming plates. The bottom forming plate 11b, 12b, 13b, regions and top forming plate 11a which surface each other 14b is thermally bonded, 12a, 13a, respectively in a region where the surface between the 14a is thermally adhered partial adhesion strength adjusting layer 7 And the adhesive strength adjustment layer 8 is formed. The printed pattern layer is formed in a region excluding the region to be thermally bonded on the surface of the blank plate.
[0016]
Adhesive strength adjusting layers 7 and 8 are ethylene-vinyl acetate copolymer, chlorinated ethylene-vinyl acetate copolymer, chlorinated polyethylene, chlorinated polypropylene, cyclized rubber, polyamide resin, urethane resin, acrylic resin. It can be formed by printing using a resin ink made of a simple substance of cellulose resin, alkyd resin or a mixture thereof. The area for forming the adhesive strength adjusting layers 7 and 8 is an area of 20% or more of the area where the surfaces of the bottom forming plates 11b, 12b, 13b and 14b and the top forming plates 11a, 12a, 13a and 14a are thermally bonded to each other. It is good to do.
[0017]
The blank plate shown in FIG. 3 is formed into a cylindrical shape by thermally bonding the side plate 11 and the adhesive plate 15, and the bottom forming plates 11b, 12b, 13b, 14b are bent and thermally bonded to form the bottom. The top portion forming plates 11a, 12a, 13a, and 14a are bent and thermally bonded to form a top portion, thereby obtaining a Gobel top type container. When discarding the gable top type container bottom bonding strength adjusting layer 8 is provided with a top forming plate 12a, the surfaces on each of 14a with peeling the heat-bonded portions, the adhesive strength adjusting layer 7 is provided forming plate 12b, 13b, and surfaces on each of 14b is separated thermally bonded portions, fold line 16 from when disassembled top and bottom of the gable top type container, a central portion of both side plates 12, 14 the width direction 5 and by folding the top forming plates 12a, 14a and the bottom forming plates 12b, 14b inward at the folding line 17 at the center in the width direction, respectively, as shown in FIG. it can.
[0018]
As shown in FIG. 4, the procedure for dismantling the bottom part of the gable top container by peeling the part where the surfaces of the bottom forming plates 12 b, 13 b, 14 b provided with the adhesive strength adjusting layer 7 are thermally bonded to each other is shown in FIG. From the state shown in FIG. 4 (a), the edge adhering portion 19 at the bottom is peeled off from the bottom forming plate 13b and raised to the state shown in FIG. 4 (b). Further, the portion where the surfaces of the bottom forming plates 12b and 14b are thermally bonded to each other is peeled off to separate the edge bonding portion 19 into the state shown in FIG. Next, the side plates 12 and 14 are folded inward at the center folding line 16 in the width direction, and the top forming plates 12a and 14a are folded inward at the center folding line 17 in the width direction. A bevel top type container can be made into the folded state shown in FIG.
[0019]
In the folded state of the paper container shown in FIG. 5, the side end portion of the rear plate 11, the top forming plate 11 a, and the bottom forming plate 11 b bonded to the bonding plate 15, that is, the end portion of the laminated body is exposed. Can be peeled off by the release layers 4, 4 a, 4 b of the laminate by bending the corner ends thereof, as shown in FIG. 6, from the corner ends of the top forming plate 11 a and the bottom forming plate 11 b, The outer surface portion composed of the polyethylene layer 1, the paper layer 2, and the adhesive resin layer 3 can be peeled off, and as shown in FIG. 7, over the entire length of the side edges of the rear plate 11, the top forming plate 11a, and the bottom forming plate 11b. Can be peeled off. Moreover, as shown in FIG. 8, after peeling off the adhesion part between the outer surfaces of the top thermal bonding part, the outer surface layer is opened by pulling the thermal bonding part between the inner surfaces and breaking the inner bonding part from the bonding end. As shown in FIG. 6, a polyethylene layer 1, a paper layer 2 and an adhesive resin layer are formed from the corner end portion of the top forming plate 11a. 3 can be peeled off. The separated outer surface portion and the inner surface portion mainly composed of plastic composed of the gas barrier layer 5 and the polyethylene layer 6 can be treated separately, so that they can be easily discarded or reused.
[0020]
【Example】
Example 1
A laminated film was prepared by laminating a 7 μ aluminum foil, a 12 μ biaxially stretched polyethylene terephthalate film, and a 60 μ polyethylene film using a urethane adhesive.
Next, using the resin inks A and B having the following composition on the aluminum foil surface of the laminated film, solid printing was performed in the order of resin ink A and resin ink B using a gravure plate having a depth of 30 μm to form a release layer. .
[Composition of resin ink A (parts by weight)]
Shellac (Lack Glaze 20E, Nippon Shellac Industry) 20
Solvent (ethanol) 80
[Composition of resin ink B (parts by weight)]
Nitrocellulose (SS1 / 4, Daicel Chemical Industries) 25
Solvent (ethyl acetate: toluene = 2: 3) 75
Separately, 30 μm of polyethylene is laminated on one side of 400 g of paperboard by extrusion coating, and the other side of the paperboard and the release layer surface of the laminated film produced above are laminated by extrusion lamination of polyethylene to a thickness of 25 μm. By doing this, polyethylene 30 μ / paperboard 400 g / polyethylene 25 μ / release layer B (resin ink B) / release layer A (resin ink A) / aluminum foil 7 μ / urethane adhesive / biaxially stretched polyethylene terephthalate 12 μ / urethane adhesive A laminate comprising an agent / polyethylene 60 μm was prepared.
The release layer of the obtained laminate was integrated with the laminate and had an adhesive force as a gobeltop container. Further, when the end portion of the laminate was bent, the laminate was peeled off at the interface between the release layer A and the release layer B, and the laminate could be easily separated into an outer surface portion and an inner surface portion.
A printed pattern is formed on the polyethylene surface of 30 μm of the above laminate, and an adhesive strength adjusting layer is formed by printing in a predetermined region, and then a blank plate for a gobeltop container is produced by punching, and the blank plate is formed into a cylinder. A top part and a bottom part were formed by thermal bonding to produce a Gobeltop type container.
The peelable layer A and the peelable layer B are formed by peeling the adhesive portions of the outer surfaces of the top and bottom of the gobbel top-type container obtained above and folding the folded corner of the container with the container folded. The separation is started at the interface between the outer surface and the inner surface, and the laminate constituting the container is easily separated into the outer surface made of polyethylene / paperboard / polyethylene and the inner surface made of gas barrier / polyethylene. I was able to.
In this embodiment, the release layer A is integrated with an inner surface layer mainly composed of plastic, and the release layer B is integrated with an outer surface layer mainly composed of paperboard, and is peeled off at the interface between the release layer A and the release layer B. Is generated.
[0021]
Example 2
Except having changed the composition of the resin ink B into the following composition, it implemented similarly to Example 1, and the result similar to Example 1 was obtained.
[Composition of resin ink B (parts by weight)]
Ethylene-vinyl acetate copolymer 10
(Evaflex 220, Mitsui DuPont Polychemical)
Solvent (toluene) 90
[0022]
Example 3
Except having changed the composition of the resin ink A and the resin ink B into the following composition, it implemented similarly to Example 1 and the result similar to Example 1 was obtained.
[Composition of resin ink A (parts by weight)]
Polyamide (Versamide 940, Henkel white water) 30
Solvent (isopropyl alcohol: toluene = 1: 1) 70
[Composition of resin ink B (parts by weight)]
Ethylene-vinyl acetate copolymer 10
(Evaflex 220, Mitsui DuPont Polychemical)
Solvent (toluene) 90
[0023]
【The invention's effect】
A thermoplastic resin layer, a paper layer, an adhesive resin layer, a release layer, a gas barrier layer, and a thermoplastic resin layer are laminated in order from the outer surface, and the release layer can be separated from the release layer into an outer surface portion and an inner surface portion. Since it is a liquid paper container made of a laminated body, the paper container can be disassembled after use, and separated from the edge of the paper container into an outer surface portion of the paper main body and an inner surface portion of the plastic main body by a release layer. Therefore, it becomes easy to dispose of used paper containers or reuse resources. In the above liquid paper container, the release layer is made of acrylic resin, vinyl chloride-vinyl acetate copolymer resin, butyral resin, cyclized rubber resin, urethane resin, cellulose resin, ethylene-vinyl acetate copolymer resin. , EVA modified urethane resin, polyamide resin, shellac, or a single layer or a mixture of two layers, and the entire surface or a layer having an arbitrary pattern with 95-5% of the total area. By adjusting the adhesive force at the interface between the adhesive resin layer and the release layer, or the adhesive force between the release layers when the release layer consists of two layers, the outer surface layer mainly composed of paper without impairing the practicality as a liquid paper container And can be separated and separated from the inner surface layer mainly composed of plastic. In the above liquid paper container, the gas barrier layer is made of a laminate of aluminum foil and a biaxially stretched plastic film, or a biaxially stretched plastic film on which a metal or metal oxide is vapor-deposited. A liquid paper container suitable for packaging wine, coffee and the like can be obtained. By configuring the liquid paper container as described above to be a govel top type, and having a configuration in which an adhesive strength adjusting layer is partially formed in a region where the outer surfaces of the top forming plate and the bottom forming plate are thermally bonded to each other , The heat bonding part between the outer surfaces of the top part and the bottom part can be easily peeled off, so that it can be easily folded, and the peeling layer can easily peel between the layers of the laminate. It can peel and isolate | separate to the inner surface layer of this. In the liquid paper container described above, the side plates are folded inward by forming a vertical folding line at the center of the top plate and the bottom plate connected to the top and bottom of the side plates and the side plates. It becomes easy to fold with.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a laminated configuration of a first embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a stacked structure according to a second embodiment of the present invention.
FIG. 3 is a plan view showing a state of the surface of a blank plate of a gobble top type container.
FIG. 4 is a partial perspective view showing a procedure for peeling and disassembling the adhesive portion between the outer surfaces of the bottom forming plate of the gobber top type container.
FIG. 5 is a perspective view showing a folded state of a gobber top type container.
FIG. 6 is a perspective view showing a state in which an outer surface layer made of polyethylene, paperboard, and adhesive resin starts to be peeled off from the end of the container.
FIG. 7 is a perspective view showing a state where the outer surface layer is peeled over the entire length of the container.
FIG. 8 is a perspective view showing a method for creating a trigger for peeling an outer surface layer and an inner surface layer.

Claims (5)

A thermoplastic resin layer, a paper layer, an adhesive resin layer, a release layer, a gas barrier layer, and a thermoplastic resin layer are laminated in order from the outer surface, and the gas barrier layer is a laminate or metal of an aluminum foil and a biaxially stretched plastic film. Alternatively, it is a biaxially stretched plastic film on which a metal oxide is vapor-deposited, and the aluminum foil surface or the surface on which the metal or the metal oxide is vapor-deposited is positioned on the release layer side, and the release layer is Two layers of a first release layer made of resin containing shellac located on the gas barrier layer side and a second release layer made of resin containing ethylene-vinyl acetate copolymer located on the adhesive resin layer side And the first release layer and the second release layer are sequentially formed on the gas barrier layer surface, the thermoplastic resin layer and the front layer. It is integrated with the second laminated sheet and the first laminated sheet consisting of a paper layer and the release layer and the gas barrier layer made of the thermoplastic resin layer through the adhesive resin layer, and the first separation layer An outer surface portion mainly composed of the thermoplastic resin layer, the paper layer, and the adhesive resin layer, and an inner surface mainly composed of the gas barrier layer and the thermoplastic resin layer. A laminate for forming a liquid paper container, comprising a laminate configured to be separable into parts.   The laminate for forming a liquid paper container according to claim 1, wherein the release layer is formed of a whole surface coat or a layer having an arbitrary pattern having 95 to 5% of the total area. Made from the liquid feed container forming laminate according to any one of claims 1, 2, a liquid paper container equipped with a front plate and a rear plate and both side plates and top forming plate and the bottom forming plate, said top liquid paper container outer surface between the forming plate and the bottom forming plate, characterized in that the partial adhesion strength adjusting layer in the area to be heat-bonded is formed.   4. The liquid paper container according to claim 3, wherein a vertical folding line is formed at each of the central portions of the top portion forming plate and the bottom portion forming plate connected to the upper and lower sides of the both side surface plates and the both side surface plates. And liquid paper container. A thermoplastic resin layer, a paper layer, an adhesive resin layer, a release layer, a gas barrier layer, and a thermoplastic resin layer are laminated in order from the outer surface, and the gas barrier layer is a laminate or metal of an aluminum foil and a biaxially stretched plastic film. Alternatively, it is a biaxially stretched plastic film on which a metal oxide is deposited, and the aluminum foil surface or the surface on which the metal or the metal oxide is deposited is positioned on the release layer side, and the release layer Two layers of a first release layer made of resin containing shellac located on the gas barrier layer side and a second release layer made of resin containing ethylene-vinyl acetate copolymer located on the adhesive resin layer side A method for producing a laminate for forming a liquid paper container comprising the gas barrier of a laminated film in which the gas barrier layer and the thermoplastic resin layer are laminated. The paper layer of the second laminated sheet comprising the paper layer and the thermoplastic resin layer, a process of producing the first laminated sheet by sequentially printing and forming the first release layer and the second release layer on the surface of the arm layer. And a second release layer of the first laminated sheet, a method for producing a laminated body for forming a liquid paper container comprising a step of forming a laminated body obtained by laminating and laminating the adhesive resin in a molten state.

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