JPH09300561A - Laminating material and container for package using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide laminating material for package in which heat resistance and chemical resistance or the like are excellent, filling packaging suitabilities for various contents and for liquid contents containing an alkali component in particular are held and its preservability is good, and to provide a container for package using the laminating material. SOLUTION: This laminating material incorporates a thermally adhesive resin layer 1 as an internal layer and incorporates a substrate film layer 2 as an external layer. The laminating material A for package incorporates a resin layer 3 made of crystalline aromatic polyamide-based resin between the above-mentioned internal layer and the external layer. Alternatively the laminating material incorporates the heat bonding resin layer 1 as the internal layer and incorporates a film layer having barrier properties as a middle layer and incorporates the substrate film layer as the external layer. The laminating material for package which incorporates a resin layer formed of the crystalline aromatic polyamide-based resin between the internal layer and the middle layer is produced. Furthermore, a container for package is produced by using the laminating material for package and performing bag-making or casing-making.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a laminated material and a packaging container using the same, more specifically, heat resistance,
The present invention relates to a packaging laminated material having excellent chemical resistance and a packaging container using the same.

[0002]

2. Description of the Related Art Conventionally, various types of packaging laminated materials and packaging containers using the same have been developed and proposed. For example, in the case of a liquid packaging paper container,
BACKGROUND ART Laminated packaging materials having the following configurations and packaging containers formed by using them to make bags or boxes are known. (1). A laminated material comprising a polyethylene resin layer / paper layer / polyethylene resin layer / aluminum foil layer / polyester resin layer / polyethylene resin layer. (2). Polyethylene resin layer / paper layer / polyethylene resin layer / aluminum foil layer / stretched polyamide resin layer /
Laminated material consisting of polyethylene resin layer. (3). A laminate comprising a polyethylene resin layer / paper layer / polyethylene resin layer / polyester resin layer having a vapor deposited film of an inorganic oxide / polyethylene resin layer. (4). Polyethylene resin layer / paper layer / polyethylene resin layer / saponified ethylene / vinyl acetate copolymer layer /
Laminated material consisting of polyethylene resin layer. (5). Laminated material consisting of polyethylene resin layer / paper layer / polyethylene resin layer / stretched polyamide resin layer / polyethylene resin layer.

[0003]

However, in the laminated packaging material having the above-mentioned structure and the packaging container formed by using them to form bags or boxes, the laminated packaging material or the packaging container is used. As a result, there is a problem that certain conditions are satisfied, but other conditions are insufficient, and in reality, there is no proposal that can satisfy the other conditions. For example, in the packaging laminated material according to the above (1) and the packaging container using the same, the packaging laminated material has good resistance to the contents such as foods, and the physical properties of the container, etc. Although no decrease is observed, however, the polyester-based resin that constitutes the polyester-based resin layer as the heat-resistant layer is inferior in chemical resistance, and in particular, the ester bond is easily hydrolyzed by an alkaline substance, and thus contains an alkaline component. There is a problem that it cannot be used for filling and packaging the contents. Next, in the packaging laminated material according to the above (2) and the packaging container using the same, since the stretched polyamide resin layer is laminated, the heat resistance, the chemical resistance, etc. are the same as those in the above (1). Is significantly improved compared to packaging laminates, but
When molding a packaging container, excessive heat is required, which easily causes a hot pinhole during molding, and as a result, when the contents containing an alkaline component are filled and packaged, the alkaline component heats up. There is a problem that it reaches the aluminum layer through the pinhole and corrodes or dissolves the aluminum forming the aluminum layer. Further, in the packaging laminate according to the above (2) and the packaging container using the same, the stretched polyamide resin layer has a relatively high permeability to organic amine compounds such as ethanolamine. Therefore, if such a chemical agent is filled and packaged, the contents permeate with the passage of time as described above even without the pinhole, and the aluminum constituting the aluminum foil is corroded and dissolved. There is. Next, the packaging laminate according to the above (3) and the packaging container using the same do not have an aluminum foil layer having no alkali resistance,
Since the polyester-based resin forming the polyester-based resin layer having the deposited film of the inorganic oxide is insufficient in heat resistance and chemical resistance, there is a problem that it is not suitable for filling and packaging alkaline contents. Furthermore, in the packaging laminates according to the above (4) and (5) and the packaging container using the same, the heat resistance of the saponified layer of the ethylene-vinyl acetate copolymer or the stretched polyamide resin layer Is insufficient, and, for example, the gas barrier property against amine-based gas such as ammonia gas is also insufficient, and there is a problem in that long-term storability is achieved. Therefore, the present invention is excellent in heat resistance, chemical resistance, etc., and has a filling and packaging suitability for various contents, and in particular, it has a filling and packing suitability for liquid contents containing an alkaline component, and its storability is The object is to provide a good packaging laminated material and a packaging container using the same.

[0004]

As a result of various studies to solve the above problems, the present inventor found that a crystalline aromatic polyamide resin has high strength, high elastic modulus, heat resistance and chemical resistance. Focusing on its excellent properties such as low water absorption, low moisture permeability, and gas barrier properties, in order to utilize the properties possessed by it, it contains a thermoadhesive resin layer as an inner layer and a base film layer as an outer layer. In the laminated material containing, between the inner layer and the outer layer, a packaging laminated material including a resin layer made of a crystalline aromatic polyamide resin, or a thermoadhesive resin layer as an inner layer, a barrier layer as an intermediate layer- In a laminated material including a flexible film layer and a substrate film layer as an outer layer,
Producing a packaging laminated material including a resin layer of a crystalline aromatic polyamide resin between the inner layer and the intermediate layer, and further using the packaging laminated material for bag making or box making for packaging. The present invention has been completed by finding that a container product can be manufactured by filling and packaging a liquid content containing an alkaline component in the packaging container, and that a packaged product having good storage stability can be manufactured. .

That is, according to the present invention, in a laminated material including a heat-adhesive resin layer as an inner layer and a base film layer as an outer layer, a resin made of a crystalline aromatic polyamide resin is provided between the inner layer and the outer layer. The present invention relates to a packaging laminated material characterized by including layers, and a packaging container manufactured using the same to form bags or boxes.

The present invention also includes a heat-adhesive resin layer as an inner layer and a barrier film layer as an intermediate layer,
In a laminated material including a substrate film layer as an outer layer, between the inner layer and the intermediate layer, a packaging laminated material characterized by containing a resin layer of crystalline aromatic polyamide resin, and using the same The present invention relates to a packaging container that has been made into a bag or a box.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail below. First, in the above-mentioned present invention, the packaging laminated material according to the present invention, and a packaging container manufactured by using the same to form a bag or a box will be described with reference to the drawings. It is sectional drawing which shows the structure of the laminated material for packaging concerning invention. As shown in FIG. 1, the packaging laminated material A according to the present invention has a thermoadhesive resin layer 1 as an inner layer.
And a resin film 3 made of a crystalline aromatic polyamide resin between the inner layer and the outer layer. Alternatively, the packaging laminate A'according to the present invention includes a thermoadhesive resin layer 1 as an inner layer, as shown in FIG.
A laminate comprising a barrier film layer 4 as an intermediate layer and a substrate film layer 2 as an outer layer, comprising a resin layer 3 made of a crystalline aromatic polyamide resin between the inner layer and the intermediate layer. It will be.

In the packaging laminates A and A'according to the present invention as described above, as the resin layer 3 made of the crystalline aromatic polyamide resin, as shown in the sectional views of FIG. 3 and FIG. On one side of the resin layer 3 made of a polar aromatic polyamide resin, a resin layer 31 made of an aliphatic polyamide resin
Polyamide resin layer B having a two-layer structure in which
(FIG. 3), or a polyamide-based resin layer B ′ having a three-layer structure in which resin layers 31, 31 made of an aliphatic polyamide-based resin are laminated on both sides of the resin layer 3 made of a crystalline aromatic polyamide-based resin (FIG. It may consist of 4).

In the present invention, the packaging container according to the present invention, which is made into a bag or a box by using the above-mentioned packaging laminated material according to the present invention, will be described below. As an example of using the packaging laminated material A according to the present invention shown in FIG. 5, FIGS. 5, 6 and 7 show the present invention in which the packaging laminated material according to the present invention is used to make a bag or a box. It is a perspective view showing a couple of such packaging containers. As a packaging container according to the present invention, as shown in FIG. 5, the packaging laminated material A is folded so that the surfaces of the heat-adhesive resin layers 1 and 1 face each other, and thereafter, around the outer periphery thereof. 6 is a three-way seal type packaging container C having a structure in which the three sides 5, 5 and 5 at the ends of the sheet are heat-sealed, or FIG.
As shown in, two sheets of the above-mentioned packaging laminated material A are prepared, and the surfaces of the heat-adhesive resin layers 1 and 1 are made to face each other and overlapped,
Thereafter, a four-way seal type packaging container D having a configuration in which four sides 6, 6, 6, and 6 at the edges around the outer periphery thereof are heat-sealed, and further, as shown in FIG. An example is a roof-type packaging container E in which the laminated material A is used to first form a bottom portion and then a occipital portion. In the present invention, instead of the packaging laminated material A according to the present invention shown in FIG. 1, the packaging laminated material A ′ according to the present invention shown in FIG. Various packaging containers according to the present invention can be manufactured. Further, it goes without saying that the present invention is not limited to the above illustrated examples.

Next, in the present invention, the materials constituting the above-mentioned packaging laminate and packaging container according to the present invention will be described. As such materials, various materials can be used. First, in the present invention, examples of the crystalline aromatic polyamide-based resin forming the resin layer of the crystalline aromatic polyamide-based resin include, for example, aromatic diamines such as meta-xylenediamine and para-xylenediamine, adipic acid, and suberic acid. An aromatic crystalline polyamide resin obtained by polycondensation reaction with a dicarboxylic acid such as sebacic acid, cyclohexanedicarboxylic acid, terephthalic acid or isophthalic acid or a derivative thereof can be used. Specifically, for example, nylon MXD6 (trade name, manufactured by Mitsubishi Gas Chemical Co., Inc.) can be used. Thus, in the present invention, a molding method such as extrusion molding, injection molding, calendar processing, co-extrusion molding, co-injection molding or the like is used by using the aromatic crystalline polyamide resin as described above. Then, the resin layer can be formed into a film or a sheet to form a resin layer of the crystalline aromatic polyamide resin. Alternatively, according to the present invention, a resin composition containing an aromatic crystalline polyamide resin as a main component as described above is applied or printed to form a coated or printed film with the resin composition, and the crystalline aromatic A resin layer made of a group polyamide-based resin can be formed. In the present invention, the film or sheet made of the crystalline aromatic polyamide-based resin produced by the molding method as described above may be used in the production or production of the film or sheet by a usual method. Thereafter, the film is stretched in the biaxial directions in the vertical and horizontal directions to produce a film subjected to the biaxial stretching treatment. In the above, the thickness of the resin layer made of the crystalline aromatic polyamide resin is, for example, about 10 to 200 μm, preferably 15 to 100 μm.
The m-th position is desirable.

Next, in the above-mentioned present invention, as an aliphatic polyamide-based resin constituting a resin layer of an aliphatic polyamide-based resin laminated on one side or both sides of a resin layer of the crystalline aromatic polyamide-based resin as described above, Is, for example, hexamethylenediamine, decamethylenediamine,
Dodecamethylenediamine, 2,2,4- or 2,4,
Aliphatic and alicyclic diamines such as 4-trimethylhexamethylenediamine, 1,3- or 1,4-bis (aminomethyl) cyclohexane and bis (p-aminocyclohexylmethane), and adipic acid and suberic acid Polyamide resins obtained by condensation of aliphatic polyamides obtained by polycondensation reaction with dicarboxylic acids such as sebacic acid, cyclohexanedicarboxylic acid, terephthalic acid and isophthalic acid or derivatives thereof, ε-aminocaproic acid, 11-aminoundecanoic acid, etc. And polyamide resins obtained from lactam compounds such as ε-caprolactam and ω-laurolactam, or mixtures thereof. Specifically, for example, nylon 6, nylon 66,
Nylon 9, Nylon 11, Nylon 12, Nylon 6
/ 66, nylon 66/610, and other aliphatic polyamide resins.

In the present invention, the method for laminating the resin layer made of the above aliphatic polyamide resin on one side or both sides of the resin layer made of the above crystalline aromatic polyamide resin is, for example, A film or sheet of the aliphatic polyamide resin is produced by extrusion molding, injection molding, calendering or the like using the aliphatic polyamide resin, and the film or sheet is made of a crystalline aromatic polyamide. A method for laminating a resin layer on one side or both sides of a resin layer, or using a crystalline aromatic polyamide resin and an aliphatic polyamide resin, using a molding method such as co-extrusion molding or co-injection molding. To form a co-extruded film or sheet on one side or both sides of the resin layer made of the crystalline aromatic polyamide resin. Ukoto can. Alternatively, in the present invention, a resin composition containing an aliphatic polyamide resin as a main component as described above is applied or printed on one side or both sides of a resin layer made of a crystalline aromatic polyamide resin to obtain the resin composition. To form a resin layer of the crystalline aromatic polyamide resin. In the present invention, a single film or sheet made of an aliphatic polyamide resin produced by the above-mentioned molding method, or a co-extruded film or sheet-like material is prepared by a conventional method.
The film having been subjected to the biaxial stretching treatment can be manufactured by stretching in the longitudinal and lateral biaxial directions during or after the production of the tongue-shaped material. In the above, the thickness of the resin layer made of the aliphatic polyamide resin is, for example, 10 to 20.
About 0 μm, preferably about 15 to 100 μm is desirable.

Further, in the present invention, the material constituting the heat-adhesive resin layer as the inner layer may be any material that can be melted by heat and fused to each other, for example, low density polyethylene, medium density polyethylene, High density polyethylene, linear low density polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-
Acrylic acid copolymer, ethylene-ethyl acrylate copolymer, ethylene-methacrylic acid copolymer, ethylene-propylene copolymer, methylpentene polymer, polybutene polymer, acid-modified polyolefin resin, and other resin films Or a sheet can be used. The thickness of the film is 5 μm to 300 μm
And preferably about 10 μm to 100 μm.

Next, in the present invention, the material constituting the substrate film layer as the outer layer is a basic material constituting the packaging container, and therefore, in terms of mechanical, physical, chemical, etc. A resin film or sheet having excellent properties can be used, and specifically,
For example, films or sheets of tough resin such as polyester resin, polyamide resin, polyaramid resin, polypropylene resin, polycarbonate resin, polyacetal resin, fluorine resin, etc., and cellophane. It is possible to use a film such as a film, a synthetic paper, a thin paper, a paperboard, a paper base such as a processed paper, a laminated material in which the above materials are arbitrarily combined and laminated, and the like. Thus, as the resin film or sheet, any one of an unstretched film and a stretched film stretched in a uniaxial or biaxial direction can be used. The thickness of the film is 5 μm to 30
About 0 μm, preferably about 10 μm to 200 μm is desirable. As the paper base material, for example, one having a basis weight of about 70 to 500 g / cm ² can be used.

Next, in the present invention, as a material for forming the barrier film layer as an intermediate layer, such a material has a property of blocking light such as sunlight, or a property of transmitting water vapor, water, gas or the like. It is possible to use a material having a property not to do so, which may be a single base material or a composite base material in which two or more kinds of base materials are combined. Specifically, for example, a film of a resin having an aluminum foil having a light-shielding property and a barrier property or a vapor deposition film thereof, a film of a resin having a vapor deposition film of an inorganic oxide such as silicon oxide or aluminum oxide having a barrier property. , Low-density polyethylene having a barrier property against water vapor, water, etc., medium-density polyethylene, high-density polyethylene, linear low-density polyethylene, polypropylene, ethylene-
Film or sheet of a resin such as a propylene copolymer,
A resin film or sheet having a gas barrier property such as polyvinylidene chloride, polyvinyl alcohol, saponified ethylene-vinyl acetate copolymer or the like, a coloring agent such as a pigment, and other desired additives are added to the resin. Various colored resin films or sheets having a light-shielding property formed by kneading to form a film can be used. These materials can be used alone or in combination of two or more. The thickness of the film or sheet is as follows:
Usually, it is preferably about 5 μm to 300 μm, more preferably about 10 μm to 100 μm. Further, in the above description, the aluminum foil has a thickness of about 5 μm to 30 μm, and the vapor deposition film of aluminum or inorganic oxide has a thickness of 100 Å to 20 μm.
It is possible to use the one of about 00Å. Examples of the resin film supporting the above-mentioned vapor-deposited film include a polyester film, a polyamide film, a polyolefin film, a polyvinyl chloride film, a polycarbonate film, a polyvinylidene chloride film, a polyvinyl alcohol film, and an ethylene-acetic acid film. Saponified vinyl copolymer films and the like can be used.

Next, in the present invention, in addition to the above-mentioned materials, other materials satisfying properties such as chemical resistance, solvent resistance, hygiene resistance, etc. may be optionally used. Yes, specifically, other materials listed above,
Etc. can be used.

Next, in the above-mentioned present invention, a method for producing a laminated material using the above-mentioned materials will be explained. As such a method, a usual packaging material is laminated.
Method such as wet lamination method, dry lamination method, solventless dry lamination method, extrusion lamination method, T-die coextrusion molding method, coextrusion lamination method, etc. You can Thus, in the present invention, when performing the above-mentioned lamination, the film can be subjected to a pretreatment such as a corona treatment and an ozone treatment, if necessary. Type), polyethyleneimine type, polybutadiene type, organic titanium type anchor, etc.
Coating agent, or known anchor coating agent such as polyurethane-based, polyacrylic-based, polyester-based, epoxy-based, polyvinyl acetate-based, cellulose-based, etc. laminate adhesive, and the like Agents and the like can be used.

Next, in the present invention, a method of making a bag or a box using the above-mentioned laminated material will be explained. For example, when the packaging container is a soft packaging bag made of a plastic film or the like, Using the laminated material manufactured by the method described above, the surfaces of the heat-adhesive resin layers of the inner layers are made to face each other, and they are folded, or two of them are overlapped, and further, the peripheral end portion thereof is heated. The bag body can be constructed by providing a seal portion by tossing. Thus, as a bag-making method, the above-mentioned laminated material is bent with its inner layer facing the surface, or two of them are overlapped, and the peripheral end of the outer periphery is further sealed with, for example, a side sheet. Seal type, two-way seal type, three-way seal type, four-way seal type, envelope-attached seal type, gasket-attached seal type (pyro-seal type), pleated seal
The heat-sealing method of the present invention can be used to manufacture various types of packaging containers according to the present invention by heat-sealing such as a heat seal type, a flat bottom seal type, a square bottom seal type, etc. it can. In addition, for example, a self-supporting packaging bag (standing pouch) can be used. In the above, as a method of heat sealing, for example, a bar seal, a rotary roll seal, a belt seal, an impulse seal, a high frequency seal, an ultrasonic seal,
Can be performed by a known method such as

Next, in the case of a liquid-filled paper container containing a paper base material as a packaging container, for example, a laminated material in which paper base materials are laminated is manufactured as a laminated material, and a desired paper container is manufactured therefrom. It is possible to manufacture a blank plate, and then to manufacture the bottom, the head and the like using the blank plate to manufacture, for example, a brick top type or a gel top type liquid paper container.

In the present invention, the packaging container manufactured as described above is used for various foods and drinks, chemicals such as adhesives and adhesives, cosmetics, pharmaceuticals, miscellaneous goods such as chemical warmers, and other articles. It is used for filling and packaging. In particular, in the present invention, since it includes a resin layer made of a crystalline aromatic polyamide resin, it has a high heat resistance that does not generate thermal pinholes in container molding, and also has a very high gas barrier property. Since it has chemical resistance, for example, inorganic hydroxides such as sodium hydroxide and potassium hydroxide, ethanolamine, propanolamine, resistance and barrier properties to highly penetrating organic amines such as morpholine, And has a gas barrier property against alkaline gas such as ammonia gas,
Alternatively, it can be used as a container for filling and packaging chemicals and pharmaceuticals containing them.

[0021]

EXAMPLES The present invention will be described more specifically with reference to examples. Example 1 A low-density polyethylene was extruded on both sides of an acid-resistant paper having a basis weight of 320 g / m ² by an extrusion lamination method to obtain a thickness of 2
A 0 μm resin layer was formed to prepare a support for the laminated base material. Next, a low-density polyethylene film having a thickness of 50 μm, a nylon MXD6 (manufactured by Mitsubishi Gas Chemical Co., Inc.) as an intermediate layer and 6 nylon as both outer layers were made of 6 nylon / nylon MXD6 / 6 with a thickness of 15 μm. A biaxially stretched co-extruded polyamide film (manufactured by Mitsubishi Chemical Corporation, trade name Super Nyl) having a nylon structure was laminated by a dry lamination method. Furthermore, a biaxially stretched co-extruded polyamide film surface of the above laminate film and a thickness of 9
An aluminum foil of μm was laminated by a dry lamination method. In the above, in the above dry lamination method, a two-component curing type urethane adhesive was used, and the coating amount was 5 g (dry) / m ² . After that, the aluminum foil surface of the above-mentioned laminate and the above-mentioned support are melt-extruded and subjected to extrusion lamination with low-density polyethylene having a thickness of 20 μm to prepare a laminate for a liquid paper container having the following layer constitution. did. 20μm low density polyethylene layer /
Basis weight 320 g / m ² , acid resistant paper / 20 μm, low density polyethylene layer / 20 μm, low density polyethylene layer / 9 μm
Aluminum foil / adhesive layer / 15 μm biaxially stretched co-extruded polyamide film / adhesive layer / 50 μm low-density polyethylene film Next, using the above-prepared laminated material for liquid paper containers, blank blank punched -The sheet is side-sealed with a gas frame sealer to form a sleeve body, which is then mounted on a filling machine and the bottom is heat-sealed.
After that, 900 ml of a commercial vehicle liquid detergent was filled from the top, and then heat fusion was performed to manufacture a gel-belt type liquid paper container.

Example 2 In Example 1 above, a 12 μm-thick biaxially stretched polyethylene terephthalate film having a silicon oxide vapor deposition layer was used in place of the 9 μm-thick aluminum foil, and the vapor deposition layer surface was used. The biaxially stretched co-extruded polyamide film surface was laminated by a dry lamination method to prepare a laminated material for a liquid paper container having the following layer constitution. 20 μm / low density polyethylene layer / basis weight 320 g /
m ² · acid resistant paper / 20 μm · low density polyethylene layer / 20
μm, low density polyethylene layer / silicon oxide vapor deposition layer ・ 12
μm biaxially oriented polyethylene terephthalate film /
Adhesive layer / 15 μm / biaxially stretched co-extruded polyamide film / adhesive layer / 50 μm low-density polyethylene film Next, using the above-prepared liquid paper container laminate, in the same manner as in Example 1 above, The blank sheet obtained by punching out this is side-sealed by a gas frame sealer to form a sleeve body, which is then mounted on a filling machine and heat-sealed at the bottom, and then 900 ml from the top. Was filled with the commercial vehicle liquid detergent of No. 1 and then heat-fused to manufacture a gel-belt type liquid paper container.

Comparative Example 1 In Example 1 above, the intermediate layer is nylon MXD6.
(Mitsubishi Gas Chemical Co., Ltd., trade name) Biaxially stretched co-extruded polyamide film (made by Mitsubishi Chemical Co., Ltd.) composed of 6 nylon / nylon MXD6 / 6 nylon with a thickness of 15 μm, both outer layers of which are 6 nylon. Instead of the trade name Super Nyl), a biaxially stretched polyethylene terephthalate film having a thickness of 12 μm is used, and otherwise the same as in Example 1 above, and has the following layer structure. A laminated material for a liquid paper container was created. 20 μm ・ Low density polyethylene layer / Basis weight 320 g / m ²・ Acid resistant paper / 20 μm ・
Low-density polyethylene layer / 20 μm, low-density polyethylene layer / 9 μm, aluminum foil / adhesive layer / 12 μm, biaxially stretched polyethylene terephthalate film / adhesive layer / 50 μm low-density polyethylene film

Comparative Example 2 In the above Example 1, the intermediate layer was nylon MXD6.
(Mitsubishi Gas Chemical Co., Ltd., trade name) Biaxially stretched co-extruded polyamide film (made by Mitsubishi Chemical Co., Ltd.) composed of 6 nylon / nylon MXD6 / 6 nylon with a thickness of 15 μm, both outer layers of which are 6 nylon. , Bi-axially stretched with a thickness of 15 μm instead of the product name Super Neil 6
Nylon film is used, otherwise Example 1 above.
Similarly to the above, a laminated material for a liquid paper container having the following layer structure was prepared. 20μm, low density polyethylene layer / basis weight 320g / m ² , acid resistant paper / 20μm, low density polyethylene layer / 20μm, low density polyethylene layer / 9μm, aluminum foil / adhesive layer / 15μm, biaxially oriented 6 nylon film / adhesion Agent layer / 50 μm low density polyethylene film

Comparative Example 3 In Example 2 above, the intermediate layer is nylon MXD6.
(Mitsubishi Gas Chemical Co., Ltd., trade name) Biaxially stretched co-extruded polyamide film (made by Mitsubishi Chemical Co., Ltd.) composed of 6 nylon / nylon MXD6 / 6 nylon with a thickness of 15 μm, both outer layers of which are 6 nylon. , Bi-axially stretched with a thickness of 15 μm instead of the product name Super Neil 6
Nylon film is used, otherwise Example 1 above.
Similarly to the above, a laminated material for a liquid paper container having the following layer structure was prepared. 20 μm ・ Low density polyethylene layer / Basis weight 320 g / m ²・ Acid resistant paper / 20 μm ・ Low density polyethylene layer / 20 μm ・ Low density polyethylene layer / Silicon oxide deposition layer ・ 12 μm ・ Biaxially oriented polyethylene terephthalate film / Adhesive layer / 15μm biaxially stretched 6 nylon film / adhesive layer / 50μm low density polyethylene film

Experimental Example The laminated sheets for liquid paper containers prepared in Examples 1 and 2 and Comparative Examples 1, 2 and 3 were used, and blank sheets were prepared by scoring them using a punching machine. , More
A side processor was used to side-sleeve to form a sleeve. After that, attach it to the sleeve filling machine created above,
The bottom is heat-sealed by hot air treatment, then 900 ml of a commercial vehicle liquid detergent (pH 13.5, containing inorganic alkali and organic amine) is filled from the mouth, and then hot-air treated and heat-sealed, A 1000 ml capacity gel-belt type liquid paper container was manufactured. The liquid paper container manufactured above is 40
Stored in a constant temperature warehouse at ℃ and 90% RH for 3 months,
The leakage of the contents from the container was observed and the properties of the container having the following contents were measured. The container physical properties were evaluated by (1) drop test and (2) adhesive strength test. (1) Drop test: Two consecutive drops from a height of 1 m onto the concrete floor surface (2) Adhesive strength test: Example 1: Adhesive strength between aluminum foil and biaxially stretched co-extruded polyamide film Example 2 : Adhesive strength between biaxially stretched polyethylene terephthalate film having a silicon oxide vapor deposition layer and biaxially stretched co-extruded polyamide film Comparative Example 1: Adhesion between aluminum foil and biaxially stretched polyethylene terephthalate film Strength Comparative Example 2: Adhesive Strength between Aluminum Foil and Biaxially Stretched 6 Nylon Film Comparative Example 3: Between Biaxially Stretched Polyethylene Terephthalate Film with Silicon Oxide Deposition Layer and Biaxially Stretched 6 Nylon Film Adhesive Strength In the above adhesive strength test, a test piece having a width of 15 mm was tested at a tensile speed of 300 mm / min using a constant-speed extension type tensile tester.

Regarding the test results of the above experimental examples, the appearance liquid leakage evaluation test is shown in Table 1 below, the drop test is shown in Table 2 below, and the adhesive strength test is shown in Table 3 below. As shown in Table 1, in the appearance liquid leakage evaluation test, in Examples 1 and 2, no liquid leakage was confirmed by the appearance inspection. On the other hand, in Comparative Examples 1, 2, and 3,
Liquid leakage was confirmed from all containers within 3 months of the storage period. Next, as shown in Table 2, in the drop test, all the containers did not leak from the containers even if they were continuously dropped twice in the initial stage. After 2 months, in Comparative Example 3, liquid leakage occurred in the drop test after 3 months. On the other hand, in Examples 1 and 2,
Even after 3 months, it had sufficient drop resistance as in the initial stage. Further, as shown in Table 3, in the adhesive strength test, in Examples 1 and 2, no remarkable decrease in adhesive strength was observed even after 3 months. On the other hand, Comparative Example 1,
In the case of 2 and 3, a significant decrease in adhesive strength or a delamination phenomenon was confirmed.

[0028]

[Table 1] 1/10 indicates that liquid leakage occurred in one of the 10 containers.

[0029]

[Table 2] N in Table 2 shows a sample article number.

[0030]

[Table 3] The unit of the interlayer adhesion strength of the container is gf / 15 mm.

[0031]

As is apparent from the above description, the present invention provides a crystalline aromatic polyamide resin having high strength and elastic modulus, excellent heat resistance and chemical resistance, and low water absorption and low Paying attention to having moisture permeability, gas barrier property, etc., in order to utilize the characteristics that it has, in the laminated material including a heat-adhesive resin layer as an inner layer and a base film layer as an outer layer, the above inner layer and outer layer In between, a packaging laminate including a resin layer made of a crystalline aromatic polyamide resin, or
In a laminated material including a thermoadhesive resin layer as an inner layer, a barrier film layer as an intermediate layer, and a base film layer as an outer layer, a crystalline aromatic polyamide resin is provided between the inner layer and the intermediate layer. To produce a packaging laminate containing a resin layer according to, and further to produce a packaging container by bag making or box making using the packaging laminate, and a liquid containing an alkaline component in the packaging container. After filling and packaging the contents,
That is, it is possible to produce a packaged product having good storability.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the structure of a packaging laminated material according to the present invention.

FIG. 2 is a cross-sectional view showing the structure of a packaging laminated material according to the present invention.

FIG. 3 is a cross-sectional view showing a structure of a polyamide resin layer having a two-layer structure in which a resin layer made of an aliphatic polyamide resin is laminated on one surface of a resin layer made of a crystalline aromatic polyamide resin.

FIG. 4 is a cross-sectional view showing a structure of a polyamide resin layer having a three-layer structure in which a resin layer made of an aliphatic polyamide resin is laminated on both surfaces of a resin layer made of a crystalline aromatic polyamide resin.

FIG. 5 is a perspective view showing an example of a packaging container according to the present invention, which is formed into a bag or a box using the packaging laminated material according to the present invention.

FIG. 6 is a perspective view showing an example of a packaging container according to the present invention, which is made into a bag or a box using the packaging laminated material according to the present invention.

FIG. 7 is a perspective view showing an example of a packaging container according to the present invention, which is formed into a bag or a box using the packaging laminated material according to the present invention.

[Explanation of symbols]

 1 Thermal Adhesive Resin Layer 2 Base Film Layer 3 Resin Layer Made of Crystalline Aromatic Polyamide-based Resin 31 Resin Layer Made of Aliphatic Polyamide-based Resin 4 Barrier Film Layer 5 Three Sides of Edge around Perimeter 6 Edge around Perimeter Part 4 A Laminated material for packaging A'Laminated material for packaging B Polyamide-based resin layer consisting of two layers B 'Polyamide-based resin layer consisting of three layers C Three-way seal type packaging container D Four-way series -Le-type packaging container E Roof-type packaging container

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location B32B 27/32 B32B 27/32 D B65D 1/09 B65D 5/00 5/00 1/00 B

Claims (11)

[Claims] 1. A laminate comprising a thermoadhesive resin layer as an inner layer and a substrate film layer as an outer layer, comprising a resin layer of a crystalline aromatic polyamide resin between the inner layer and the outer layer. Laminated material for packaging characterized by. 2. A laminate comprising a thermoadhesive resin layer as an inner layer, a barrier film layer as an intermediate layer, and a base film layer as an outer layer, wherein a crystalline material is provided between the inner layer and the intermediate layer. A packaging laminate comprising a resin layer made of an aromatic polyamide resin. 3. The packaging laminate according to claim 1 or 2, wherein the resin layer made of the crystalline aromatic polyamide resin is a biaxially stretched film. 4. A resin layer made of a crystalline aromatic polyamide resin is composed of two or three polyamide resin layers in which a resin layer made of an aliphatic polyamide resin is laminated on one side or both sides thereof. Claims 1 and 2 above
Alternatively, the laminated material for packaging described in 3. 5. The packaging laminate according to claim 4, wherein the two to three polyamide resin layers are a laminate of coextrusion films. 6. The packaging laminate according to claim 5, wherein the laminate of the co-extrusion film is made of a biaxially stretched film. 7. The above-mentioned claim 1, 2, 3, 4, 5 or 6, wherein the base film layer as an outer layer is mainly composed of a resin film, paper or a laminate thereof. Laminates for packaging to be described. 8. The packaging according to claim 1, 2, 3, 4, 5, 6 or 7, wherein the heat-adhesive resin layer as an inner layer contains a polyolefin resin as a main material. Laminated material. 9. The barrier film layer as an intermediate layer comprises aluminum or an inorganic oxide as a main material, as described in the above item 1, 2, 3, 4, 5, 6, 7, or 8. The laminated material for packaging described in. 10. A laminate comprising a heat-adhesive resin layer as an inner layer and a base film layer as an outer layer, and a package including a resin layer made of a crystalline aromatic polyamide resin between the inner layer and the outer layer. A packaging container characterized by being formed into a bag or a box from a laminated material for use in packaging. 11. A laminate comprising a thermoadhesive resin layer as an inner layer, a barrier film layer as an intermediate layer, and a substrate film layer as an outer layer, wherein a crystal is formed between the inner layer and the intermediate layer. A packaging container characterized by being formed into a bag or a box by laminating a packaging laminated material including a resin layer made of a polar aromatic polyamide resin.