JPH11198289A - Multi-layer laminated heat-sealing material, and laminated body and packaging container using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a product excellent in laminating strength and scent- retaining characteristics or the like of a content by sequentially laminating a first heat-sealing layer, an interlayer, and a second heat-sealing layer, where the first and the second heat-sealing layers are laminated as outermost layers. SOLUTION: A multi-layer laminating heat-sealing material A has a basic structure composed by sequentially laminating a first heat-sealing layer 1, an interlayer 2, and a second heat-sealing layer 3, where the first and the second heat-sealing layers 1 and 3 are laminated as outermost layers. And a multi-layer laminated heat-sealing material, composed by laminating each interlaminar of the first heat-sealing layer 1, the interlayer 2, and the second heat-sealing layer 3 through an extruded adhering resin layer formed by a multi-layer inflation molding, a multi-layer T-die casting, or a multi-layer co-extrusion laminating, can be used for the multi-layer laminated heat-sealing material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multilayer laminated heat seal material, a laminate using the same, and a packaging container. More particularly, the present invention relates to a laminate having excellent laminating strength and a fragrance preserving property. TECHNICAL FIELD The present invention relates to a multilayer laminated heat seal material excellent in properties and the like, a laminated body using the same, and a packaging container.

[0002]

2. Description of the Related Art Conventionally, in order to fill and package various articles, plastic base materials, paper base materials, metal foils, and the like have been used, and these have been arbitrarily laminated to develop various packaging materials. Has been proposed. In these packaging materials, a heat seal material layer is usually provided on the innermost layer, the heat seal material layers are superimposed on each other, and the peripheral edge is heat sealed. To produce various types of packaging containers, and from the opening of the packaging container, for example, food and drink, pharmaceuticals, cosmetics, detergents, chemicals, miscellaneous goods,
Various contents such as others are filled and packaged to produce various packaged products. By the way, as the heat seal material provided in the innermost layer, usually, a plastic base material,
Heat-sealing is performed on the inner surface of a paper base material or a base material such as a metal foil as a barrier material or an intermediate material via a laminating adhesive or a laminating extruded resin layer.
The film is formed by laminating a flexible film, for example, a film of a polyethylene resin.

[0003]

However, in the heat-sealing material as described above, the laminating strength of the heat-sealing film is low, and the heat-sealing material layers are opposed to each other. Even if the package is sealed and sealed by forming a seal portion by heat sealing the peripheral end portion, a phenomenon such as delamination occurs, and a sufficiently satisfactory packaged product can be manufactured. The reality is that it is difficult. Further, a heat-sealing device comprising a film of a polyethylene resin as described above or the like.
In the case of metal materials, the contents to be filled and packed, especially, for example,
When the scent-retaining component such as toothpaste, detergent, and cosmetics contains a scent-retaining component, the scent-repelling component penetrates into the packaging material through a heat seal material such as a polyethylene resin film. However, there is a problem that the fragrance of the contents is lacking. Further, as described above, when the fragrance-retaining component penetrates into the packaging material through a heat seal material made of a polyethylene resin film or the like, a peeling phenomenon or the like occurs between the layers of the packaging material constituting the packaging container. Causes problems such as leakage of contents. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a heat seal material which is excellent in laminate strength and further excellent in fragrance retention of contents, a laminate and a packaging container using the same.

[0004]

As a result of various studies on the above problems, the present inventor has found that the first heat-sealing layer, the intermediate layer, and the second heat-sealing layer. The first and second heat sealable layers are laminated as the outermost layers to produce a multilayer laminated heat seal material, and then the multilayer laminated heat seal material is manufactured. -First or second heat seal material
On at least one surface of the adhesive layer, at least a substrate film is laminated to produce a laminate, and further, using the laminate, the other heat-sealing layer is opposed to the laminate. The packaging container is manufactured by superposing and heat-sealing the end around the outer periphery to form a sealing portion. Pharmaceuticals, cosmetics, detergents,
Various products such as chemicals, miscellaneous goods, etc. were filled and packaged to produce various types of packaged products. The multilayer laminate heat seal material had excellent laminate strength, and the phenomenon of delamination etc. Almost not recognized, and also shields the permeation of perfume-retaining components and the like in the contents with the intermediate layer, exhibits extremely excellent perfume-retaining performance, and does not show any accompanying delamination phenomenon, and Very useful multi-layer laminated heater without leakage of contents
It has been found that a toseal material, a laminate and a packaging container using the same can be manufactured, and the present invention has been completed.

That is, the present invention provides a first heat-sealing layer, an intermediate layer, and a second heat-sealing layer, and further includes first and second heat-sealing layers. The present invention relates to a multilayer laminated heat seal material characterized by being laminated with an outermost layer having a sealing layer, a laminate using the same, and a packaging container.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail below. First, the structure of a multilayer laminated heat seal material according to the present invention, a laminated body using the same, and a container for packaging will be described with reference to the drawings by exemplifying a few examples. FIG. 1 and FIG. FIG. 3 is a schematic cross-sectional view showing a layer configuration of a multilayer laminated heat seal material according to the present invention.
FIG. 4 is a schematic cross-sectional view showing a layer structure of a laminate according to the present invention manufactured using the multilayer laminated heat seal material shown in FIG. 1 or FIG. 2, and FIG. FIG. 5 is a schematic perspective view illustrating a configuration of a packaging container according to the present invention manufactured using a body, and FIG. 5 is a configuration of a packaging product in which contents are filled and packaged using the packaging container illustrated in FIG. 4. It is a schematic perspective view which shows.

First, in the present invention, a multilayer laminated heat seal material according to the present invention will be described. As the multilayer laminated heat seal material according to the present invention, for example, as shown in FIG. No. 1 heat-sealing layer 1, intermediate layer 2, and second heat-sealing layer 3, and furthermore, first and second heat-sealing layers 1. , A multi-layered heat seal material A having a basic structure of laminating 3 as the outermost layer
Can be mentioned. As shown in FIG. 2, the multi-layer laminated heat seal material according to the present invention includes a first heat-sealing layer 1, an intermediate layer 2, and a second heat seal. Laminated layers having a configuration in which the respective layers of the functional layer 3 are laminated via extruded adhesive resin layers 4 and 4a of multilayer inflation molding, multilayer T die cast molding or multilayer co-extrusion lamination molding described below. Heat seal material B can be used. The above-mentioned examples illustrate only 12 examples of the multilayer laminated heat seal material according to the present invention, and the present invention is not limited thereto. -The sealing material can be further laminated with another base material between the layers depending on, for example, the contents to be filled, the packaging purpose, and the like.

Next, in the present invention, the laminate according to the present invention will be described. As the laminate according to the present invention, as shown in FIG.
First or second heat-sealing layer 1 of sealing material A,
3, at least one base film 5
Can be used. Although not shown, a laminate according to the present invention is obtained by further laminating a heat-sealing film or the like on the other surface of the base film 5 of the laminate C shown in FIG. Can be used. The above is an example of the laminate according to the present invention,
The present invention is not limited to this, for example, the laminate according to the present invention, for example, depending on the content to be filled, its packaging purpose, etc., it is possible to further laminate another substrate between each layer You can do it.

Next, in the present invention, the packaging container according to the present invention will be described. As the packaging container according to the present invention, for example, as shown in FIG. 4, the laminate C shown in FIG. To explain in an example of use, the above-mentioned laminates C, C are used, and the heat-sealing layers 3, 3 are superimposed on each other so as to face each other. By heat sealing the parts to form the seal parts 6, 6, 6, the packaging container D according to the present invention can be manufactured. Thus, in the present invention, as shown in FIG. 5, the contents 7 are filled from the upper opening of the packaging container D manufactured above, and then the opening is heat-sealed. By forming the upper end seal portion 8 by using this method, a packaged product E using the packaging container D according to the present invention can be manufactured. The above illustration is an example of a packaging container according to the present invention, and the present invention is not limited thereto. For example, using the laminate shown in FIG. Similarly, the packaging container bag according to the present invention can be manufactured. In the present invention, the form of the packaging container may be various types such as a self-supporting bag (standing pouch), a gusset seal type packaging bag, a pillow-type packaging bag, a laminating tube container, and the like. A packaging container having a form can be manufactured.

Next, in the present invention, a multilayer laminated heat seal material as described above, a laminate using the same,
First, in the present invention, the first and second heat seals constituting the multilayer laminated heat seal material according to the present invention will be described.
As a material for forming the elastic layer, any material can be used as long as it can be extruded and can be melted by heat and fused to each other. For example, low-density polyethylene, medium-density polyethylene, high-density polyethylene, Chain (linear) low-density polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene -Propylene copolymer, methyl pentene polymer-, polyolefin resin such as polyethylene or polypropylene acrylic acid,
Acid-modified polyolefin resins modified with unsaturated carboxylic acids such as methacrylic acid, maleic acid, maleic anhydride, fumaric acid, itaconic acid, etc., polyvinyl acetate resins, polyester resins, polystyrene resins, etc. Resins consisting of one or more of the above resins can be used. In the present invention, when the first and second heat-sealing layers are formed using the above-mentioned resins, they may be formed by combining the same kind of resin or different kinds of resins. Specifically, for example, the first heat sealable layer and the second heat sealable layer may be formed using the same type of polyethylene resin,
The first heat-sealing layer and the second heat-sealing layer are formed of different types of polyethylene resin and ethylene-vinyl acetate copolymer, or a polyethylene resin and ethylene-methacrylic acid copolymer. It can also be formed using coalescence.

In the present invention, among the above resins, it is particularly preferable to use linear low-density polyethylene. The above-mentioned linear low-density polyethylene has the advantage of improving the impact resistance with less propagation of breakage due to having tackiness,
In addition, since the inner layer is in constant contact with the contents, it is also effective for preventing deterioration of environmental stress cracking resistance. In the present invention, the linear low-density polyethylene, other resins can be blended,
For example, by blending an ethylene-butene copolymer or the like, although the heat stability is slightly lower and the seal stability tends to deteriorate in a high-temperature environment, the tearing property is improved, which contributes to easy opening. There is an advantage.

Further, in the present invention, the above-mentioned
As the linear low-density polyethylene as the resin having a sealing property, specifically, an ethylene-α-olefin copolymer polymerized using a metallocene catalyst can be used. Examples of the ethylene-α-olefin copolymer polymerized using the above metallocene catalyst include, for example, a catalyst formed by a combination of a metallocene complex and an alumoxane such as a catalyst formed by a combination of zirconocene dichloride and methylalumoxane, that is, a metallocene catalyst. Ethylene-α-olefin copolymers obtained by polymerization can be used. The metallocene catalyst has a non-uniform active site and is called a multi-site catalyst, whereas the existing catalyst is called a single-site catalyst because the active site is uniform. Specifically, the product name "Kernel" manufactured by Mitsubishi Chemical Corporation, the product name "Evolu" manufactured by Mitsui Petrochemical Industry Co., Ltd., the product name "EXACT" manufactured by EXXON CHEMICAL, USA (EXACT) ", Dow Chemical, USA (D
OW CHEMICAL) brand name “AFFINITY”, brand name “ENGAGE (ENG)
AGE) and the like. An ethylene-α-olefin copolymer polymerized using a metallocene catalyst such as “AGE)” can be used.
In the present invention, when an ethylene-α-olefin copolymer polymerized by using the above-mentioned metallocene catalyst is used, an advantage that a low-temperature heat-sealing property can be obtained at the time of producing a bag is provided. Have

Further, in the present invention, as a material for forming an intermediate layer constituting the multilayer laminated heat seal material according to the present invention, adsorption of a fragrance component and the like contained in the contents to be filled and packaged is included. Less aroma-enhancing properties, furthermore, it has the property of not causing a taste change, off-flavor, etc., and it is possible to use a resin that can be extruded. Specifically, for example, a polyacrylic resin, Polymethacrylic resin, polyacrylonitrile resin, polymethacrylonitrile resin, polystyrene resin, polycarbonate resin, polyethylene terephthalate resin or a part of its ethylene component and / or terephthalate component Resin or polyethylene naphthalate resin obtained by copolymerizing or modifying a di- or other polyhydric alcohol component or dicarboxylic acid component Polyester resins, polyamide resins, ethylene - saponified vinyl acetate copolymer, polyvinyl alcohol - Le resins, polyvinyl chloride resins, polyvinylidene chloride resins, may be a resin other like. Thus, in the present invention, among the above resins, it is desirable to use a resin having a scent-retaining property and a barrier property against oxygen gas or water vapor, and specifically, for example, ethylene-vinyl acetate It is desirable to use a saponified copolymer, a polyamide-based resin, a polyacrylonitrile-based resin, a polyester-based resin, or the like, which is a resin rich in fragrance retention and barrier properties.

Next, in the present invention, a method for producing a multilayer laminated heat seal material according to the present invention using the above-mentioned materials will be described. Molding method to make a multilayer film,
For example, a T-die method, an inflation method, a multilayer co-extrusion laminating method, or the like is employed. In particular,
Multi-layer T such as feed block method and multi-manifold method
Using a molding method such as a die casting molding method, a multilayer inflation molding method, or a multilayer co-extrusion lamination molding method, for example, a first heat seal made of a polyethylene resin is used. Layer / adhesive resin layer composed of acid-modified polyolefin resin / intermediate layer composed of saponified ethylene-vinyl acetate copolymer / adhesive resin layer composed of acid-modified polyolefin resin / second resin composed of polyethylene resin A three-layered five-layer laminate such as a toseal layer, or a first heat-sealable layer made of a polyethylene resin / an adhesive resin layer made of an acid-modified polyolefin-based resin / ethylene-vinyl acetate Interlayer composed of saponified copolymer / adhesive resin layer composed of acid-modified polyolefin resin / intermediate layer composed of saponified ethylene-vinyl acetate copolymer / acid-modified Second heat comprising an adhesive resin layer / polyethylene resin comprising a polyolefin-based resin - city - in which it is possible to produce the three 7-layer laminate, such as Le resistant layer.

Next, in the present invention, the thickness of each of the layers constituting the multilayer laminated heat seal material according to the present invention as described above may be, for example, the first or second heat seal property. The thickness of the layer is about 1 to 200 μm, preferably
About 5-100 μm is desirable, and as the intermediate layer,
About 1 to 100 μm, preferably about 5 to 50 μm is desirable. Further, the adhesive resin layer between each of the first or second heat-sealing layer and the intermediate layer is about 1 to 100 μm.
μm, preferably 5 to 50 μm.

Next, in the present invention, since the base film constituting the laminate according to the present invention is a basic material constituting a packaging container, it can be mechanically, physically, chemically or otherwise. A resin film or sheet having excellent properties can be used, and specifically, for example, a polyester resin, a polyamide resin, a polyaramid resin, a polypropylene resin, a polycarbonate resin A tough resin film or sheet such as a resin, a polyacetal resin, a fluorine resin, or the like can be used. 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. In the present invention, the thickness of the resin film or sheet is as follows:
Any thickness may be used as long as the strength and rigidity can be kept to the minimum necessary. If it is too thick, there is a disadvantage that the cost will increase. Conversely, if it is too thin, the strength and rigidity etc. decrease, which is not preferable. It is. In the present invention, for the above reasons, about 10 μm to 100 μm, preferably about 12 μm to 50 μm is most desirable. In the present invention, the base film as described above is subjected to, for example, front printing or back printing by printing a desired printing pattern such as a character, a figure, a symbol, a picture, or a pattern by a normal printing method. It may be.

Next, in the present invention, as the base film constituting the above-mentioned laminate, for example, various paper base materials constituting a paper layer can be used.
In the present invention, as the paper substrate, moldability, bending resistance,
Uses a rigid or sized bleached or unbleached paper base, or a paper base such as pure white roll paper, kraft paper, paperboard, or processed paper, etc. Can be. In the above, as the paper base material constituting the paper layer, it is desirable to use a base material having a basis weight of about 80 to 600 g / m ² , preferably a base weight of about 100 to 450 g / m ² . Needless to say, in the present invention, a paper base constituting the paper layer and various resin films or sheets as the base films mentioned above can be used in combination.

In the present invention, in the laminate according to the present invention, a heat seal which can be further melted by heat and fused to each other is provided on the other surface of the base film constituting the laminate. Film of a conductive resin, for example, low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear (linear) low-density polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-ethyl acrylate Polymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-
Acid-modified polyolefin obtained by modifying polyolefin resin such as propylene copolymer, methylpentene polymer, polyethylene or polypropylene with unsaturated carboxylic acid such as acrylic acid, methacrylic acid, maleic anhydride, fumaric acid, itaconic acid, etc. Resin or film made of one or more of resins such as base resin and others
Can be stacked. The resin film or sheet described above can be used in a single layer or a multilayer. The thickness of the resin film or sheet is about 5 μm to 300 μm, preferably 10 μm to 1 μm.
About 00 μm is desirable.

Next, in the present invention, when the laminate according to the present invention is produced, further, as an intermediate substrate, for example, a property of blocking light such as sunlight, water vapor,
A material having the property of not permeating water, gas such as oxygen, etc.,
Other materials can be used, which may be a single substrate or a composite substrate obtained by combining two or more types of substrates. Specifically, for example, a resin film having an aluminum foil having a light-shielding property and a barrier property or a vapor-deposited film thereof, a silicon oxide film having a barrier property, a resin film having a vapor-deposited film of an inorganic oxide such as aluminum oxide. Film or sheet of resin such as low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear low-density polyethylene, polypropylene, ethylene-propylene copolymer, etc. Kneading a resin film or sheet such as polyvinylidene chloride, polyvinyl alcohol, saponified ethylene-vinyl acetate copolymer, etc., with a coloring agent such as a pigment, and other desired additives. It is possible to use films or sheets of various colored resins having light-shielding properties that are formed into films. Kill.
These materials can be used alone or in combination of two or more. The thickness of the above-mentioned film or sheet is arbitrary, but usually 5 μm to 300 μm.
μm, more preferably about 10 μm to 100 μm. Further, in the above, as the aluminum foil,
A film having a thickness of about 5 μm to 30 μm, and a deposited film of aluminum or an inorganic oxide having a thickness of 100
Those of about $ 2000 to $ 2000 can be used.
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.

Further, in the above, as the inorganic oxide constituting the above-mentioned inorganic oxide deposited film layer, for example, silicon oxide (SiO _x ), aluminum oxide, indium oxide, tin oxide, zirconium oxide and the like are used. can do. Furthermore, in the present invention, the inorganic oxide may be a mixture of silicon monoxide and silicon dioxide, or a mixture of silicon oxide and aluminum oxide. In the present invention, as a method of forming the inorganic oxide thin film layer, the inorganic oxide thin film layer is formed by forming a vapor deposition film by a vacuum vapor deposition method such as an ion beam method or an electron beam method, or a sputtering method. be able to. In the above description, the thickness of the inorganic oxide thin film layer is usually preferably about 100 ° to 2000 ° in order to obtain a sufficient barrier property.
It is desirable to be around {1500}. In the above, when the thickness of the inorganic oxide thin film layer exceeds 1500 °, in particular, 2
When it exceeds 000 °, cracks and the like are apt to be formed in the thin film layer of the inorganic oxide, and there is a danger that the barrier property is lowered by the warp, and the material cost is increased. , Less than 100 °, especially less than 200 °, it is difficult to obtain the effect, which is not preferable.

Furthermore, in the present invention, since the packaging container is usually subjected to severe physical and chemical conditions, strict packaging suitability is required for the packaging material constituting the packaging container. Required, deformation prevention strength, drop impact strength, pinhole resistance, heat resistance, sealing, quality maintenance, workability,
Various conditions such as hygiene, etc. are required. For this reason, in the present invention, any material that satisfies the above conditions can be arbitrarily selected and used. Specifically, for example, , Low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-ethyl acrylate copolymer, ethylene -Acrylic acid or methacrylic acid copolymer, methylpentene polymer-,
Polybutene resin, polyvinyl chloride resin, polyvinyl acetate resin, polyvinylidene chloride resin, vinyl chloride
Vinylidene chloride copolymer, poly (meth) acrylic resin, polyacrylonitrile resin, polystyrene resin, acrylonitrile-styrene copolymer (AS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin), Polyester resin, polyamide resin, polycarbonate resin, polyvinyl alcohol
Resin, saponified ethylene-vinyl acetate copolymer,
Fluorine resin, diene resin, polyacetal resin,
Any known resin film or sheet such as polyurethane resin, nitrocellulose, etc. can be used. In addition, for example, a film such as cellophane, synthetic paper, or the like can be used. In the present invention, the above-mentioned film or sheet can be used in any of unstretched and uniaxially or biaxially stretched. The thickness is arbitrary, but can be selected from a range of several μm to 300 μm. Further, in the present invention, the film or sheet may be any film such as an extruded film, an inflation film, or a coating film.

Next, a method of manufacturing a laminate using the above-mentioned materials in the present invention will be described. As the method, a usual packaging material is laminated.
For example, a wet lamination method, a dry lamination method, a solventless dry lamination method, an extrusion lamination method, a co-extrusion lamination method, or the like can be used. Thus, in the present invention, when performing the above-mentioned lamination, if necessary, for example, a pretreatment such as a corona treatment and an ozone treatment can be performed on the film and / or the resin layer.
Isocyanate-based (urethane-based), polyethyleneimine-based, polybutadiene-based, organic titanium-based anchors
Polyurethane, polyacrylic, polyester, epoxy, polyvinyl acetate,
Known pretreatments such as cellulose and other laminating adhesives, anchor coating agents, adhesives and the like can be used.

Next, in the present invention, a method for producing a bag or a box using the above-mentioned laminate will be described. For example, when the packaging container is a soft packaging bag made of a plastic film or the like, Using the laminated body manufactured by such a method, the heat-sealing resin layer of the inner layer is opposed to the laminated body, and the heat-sealing resin layer is folded, or the two sheets are overlapped, and the peripheral end portion is further folded. A bag can be formed by providing a seal portion by heat sealing. Thus, as a bag making method, the above-mentioned laminate is folded with its inner layer facing the surface, or two of them are overlapped,
Further, the peripheral end portion of the outer periphery is formed, for example, by a side seal type, a two-side seal type, a three-side seal type, a four-side seal type, an envelope-attached seal type, and a gasket-attached seal type ( According to the present invention, a heat seal is formed according to a heat seal form such as a (pyrro-seale type), a pleated seal type, a flat bottom seal type, a square bottom seal type, and the like. Various forms of packaging containers can be manufactured. Others, for example, self-supporting packaging bags (standing pouches)
And the like can be manufactured, and in the present invention, a tube container and the like can be manufactured using the above-mentioned laminated material. 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 In the present invention, a spout such as a one-piece type, a two-piece type, etc., or a zipper for opening and closing can be arbitrarily attached to the packaging container as described above.

Next, in the case of a liquid-filled paper container containing a paper substrate as a packaging container, for example, a laminate in which paper substrates are laminated is manufactured as a laminate, and a desired paper container is manufactured therefrom. A blank plate is manufactured, and thereafter, a body, a bottom, a head and the like are manufactured using the blank plate to manufacture, for example, a liquid paper container of a brick type, a flat type or a gable-top type. be able to. Moreover, the shape can be manufactured by any of a rectangular container, a circular or other cylindrical paper can, and the like.

In the present invention, the packaging container manufactured as described above may be used for various foods and drinks, chemicals such as adhesives and adhesives, cosmetics, detergents, pharmaceuticals, miscellaneous goods such as chemical warmers, etc. It is used for filling and packaging of various articles.

[0026]

EXAMPLES The present invention will be described more specifically with reference to examples. Example 1 High pressure method low density polyethylene (density = 0.924, melt index, MI = 0.8) and acid anhydride graft polymerized low density polyethylene (adhesive resin, density = 0.92)
4, melt index, MI = 1.5) and a saponified ethylene-vinyl acetate copolymer (ethylene content 32 mol%, density = 1.19, melt index, MI =
Using the three types of resins described in 1.3) above, a multilayer film was formed by a multilayer inflation method to produce a three-layer, five-layer multilayer heat seal material having the following layer structure. Low-density polyethylene layer with a thickness of 10 μm / thickness of 10 μm
m low-density polyethylene layer / 10 μm thick saponified layer of ethylene-vinyl acetate copolymer / 10 μm-thick acid anhydride graft-polymerized low-density polyethylene layer / 10 μm-thick low-density polyethylene layer Next, the thickness 1 of the multi-layer laminated heat seal material produced above was obtained.
One surface of the low-density polyethylene layer having a thickness of 0 μm is subjected to corona treatment, and then an adhesive for two-component curing type polyurethane laminating is applied to the corona treated surface at a thickness of 3.0 g / m ² (dry). To form an adhesive layer. Thereafter, a biaxially stretched polyethylene terephthalate having a thickness of 12 μm was formed on the surface of the adhesive layer.
The resulting film was dry-laminated to produce a laminate having the following layer structure. 12 μm thick biaxially oriented polyethylene terephthalate film layer / adhesive layer / thickness 10
Low-density polyethylene layer having a thickness of 10 μm / anhydride graft polymerization having a thickness of 10 μm Low-density polyethylene layer / a saponified layer of an ethylene-vinyl acetate copolymer having a thickness of 10 μm
m low-density polyethylene layer / 10 μm thick low-density polyethylene layer

Example 2 High-pressure low-density polyethylene (density = 0.92, melt index, MI = 0.6) and acid anhydride-grafted linear low-density polyethylene (adhesive resin, density = 0.9)
1, melt index, MI = 3.5) and a saponified ethylene-vinyl acetate copolymer (ethylene content 38 mol%, density = 1.17, melt index, MI =
1.6) and a metallocene α-olefin copolymer polyethylene (density = 0.92, melt index, MI
= 2.0), and using multilayer inflation
A multi-layered heat seal material having the following layer constitution and four layers and five layers was manufactured by a multi-layer film forming method according to the following method. Low-density polyethylene layer with a thickness of 30 μm / thickness of 10 μm
m low-density polyethylene layer / 10 μm-thick saponified layer of ethylene-vinyl acetate copolymer / 10 μm-thick acid anhydride-grafted low-density polyethylene layer / 30 μm-thick metallocene α-layer Olefin copolymer polyethylene layer Next, the thickness 3 of the multilayer laminated heat seal material produced above
While extruding low-density polyethylene to a thickness of 20 μm on the surface of the low-density polyethylene layer of 0 μm, a 12 μm-thick biaxially stretched polyethylene terephthalate film having a silicon oxide deposition film is applied to the silicon oxide deposition film surface. A laminate having the following layer structure was produced by sandramine via a urethane-based anchor coating agent layer (thickness: 0.5 g / m ² ). Biaxially stretched polyethylene terephthalate film layer with a thickness of 12 μm, evaporated silicon oxide film / anchor coating agent layer / low density polyethylene extruded layer with a thickness of 20 μm / low density polyethylene layer with a thickness of 30 μm / thickness of 10 μm Anhydride-grafted low-density polyethylene layer / 10 μm thick ethylene-vinyl acetate copolymer saponified layer / 10 μm-thick acid anhydride graft-polymerized low-density polyethylene layer / 30 μm thick metallocene α-olefin Copolymer polyethylene layer

Example 3 High pressure method low density polyethylene (density = 0.92, melt index, MI = 0.6) and acid anhydride graft polymerized low density polyethylene (adhesive resin, density = 0.924,
Melt index, MI = 1.5) and acid anhydride graft polymerized linear low density polyethylene (adhesive resin, density = 0.91, melt index, MI = 3.5),
Acid anhydride graft polymerized ethylene-vinyl acetate copolymer (adhesive resin, density = 0.93, melt index,
MI = 0.7) and a saponified ethylene-vinyl acetate copolymer 1 (ethylene content 32 mol%, density = 1.19,
Melt index, MI = 1.3, low moisture resistance, high barrier property) and saponified ethylene-vinyl acetate copolymer 2
(Ethylene content 44 mol%, density = 1.14, melt index, MI = 5.5, large moisture resistance, small barrier property)
And an ethylene-vinyl acetate copolymer (vinyl acetate content 6
Mol%, density = 0.93, melt index, MI =
1.0), and formed into a multilayer film by a multilayer inflation method to produce a multilayer laminated heat seal material having seven layers and seven layers having the following layer structure. Low-density polyethylene layer having a thickness of 5 μm / anhydride graft-polymerized low-density polyethylene layer having a thickness of 5 μm / thickness of 5 μm
1 layer of a saponified ethylene-vinyl acetate copolymer having a thickness of 5 m / acid anhydride graft polymerization linear low density polyethylene layer having a thickness of 5 μm / two layers of a saponified ethylene-vinyl acetate copolymer having a thickness of 5 μm / thickness Anhydride-grafted ethylene-vinyl acetate copolymer layer having a thickness of 5 μm / ethylene-vinyl acetate copolymer layer having a thickness of 5 μm
Vinyl acetate copolymer layer Next, the thickness 5 of the multilayer laminated heat seal material produced above
While extruding low-density polyethylene to a thickness of 20 μm on the surface of the low-density polyethylene layer having a thickness of 20 μm, a biaxially stretched polypropylene film having a thickness of 20 μm coated with polyvinylidene chloride resin is coated with a urethane-based anchor coating agent layer ( A laminate having the following layer constitution was produced by sandramine with a thickness of 0.5 g / m ² ). Polyvinylidene chloride resin coat biaxially oriented polypropylene film with a thickness of 20 μm / anchor coating agent layer / low density polyethylene extrusion layer with a thickness of 20 μm / low density polyethylene layer with a thickness of 5 μm / acid anhydride with a thickness of 5 μm Graft polymerized low-density polyethylene layer / Saponified product of ethylene-vinyl acetate copolymer having a thickness of 5 μm / layer of acid anhydride graft-polymerized linear low-density polyethylene layer having a thickness of 5 μm / Ethylene-vinyl acetate having a thickness of 5 μm 2 layers of saponified copolymer / 5 μm thick
Anhydride-grafted ethylene-vinyl acetate copolymer layer / 5 μm thick ethylene-vinyl acetate copolymer layer

Example 4 High pressure method low density polyethylene (density = 0.92, melt index, MI = 4.5) and acid anhydride graft polymerized low density polyethylene (adhesive resin, density = 0.90, melt index) , MI = 4.4) and acid anhydride graft polymerized polypropylene (adhesive resin, density = 0.91,
Melt index, MI = 3.0) and terephthalic acid
Ethylene glycol / 1.4-cyclohexanedimethanol copolymer thermoplastic amorphous polyester (density = 1.
27) and random copolymerized polypropylene (density = 0.
90, melt index, MI = 7.0), and formed into a multi-layer film by a multi-layer T die-casting method. Manufactured lumber. Low-density polyethylene layer having a thickness of 5 μm / anhydride graft polymerization having a thickness of 5 μm Low-density polyethylene layer / terephthalic acid / ethylene glycol / 1.4-cyclohexanedimethanol copolymer having a thickness of 5 μm Crystalline polyester layer / acid anhydride graft-polymerized polypropylene layer having a thickness of 5 μm / random copolymerized polypropylene layer having a thickness of 5 μm Next, the thickness of the multilayer laminated heat seal material prepared above was 5
While extruding low-density polyethylene to a thickness of 20 μm on the surface of the low-density polyethylene layer having a thickness of 15 μm,
A laminated body having the following layer structure was produced by sandwiching the urethane-based anchor coating agent layer (thickness: 0.5 g / m ² ) on the axially stretched nylon film. Thickness 15
μm biaxially stretched nylon film layer / anchor coating agent layer / 20 μm thick low density polyethylene extruded layer / 5 μm thick low density polyethylene layer / 5 μm thick acid anhydride graft polymerized low density polyethylene layer / 5 μm-thick terephthalic acid / ethylene glycol / 1.4-cyclohexanedimethanol copolymer thermoplastic amorphous polyester layer / 5 μm-thick acid anhydride graft-polymerized polypropylene layer / 5 μm-thick random Copolypropylene layer

Example 5 High pressure method low density polyethylene (density = 0.929, melt index, MI = 3.0) and acid anhydride graft polymerized linear low density polyethylene (adhesive resin, density = 0.29)
888, melt index, MI = 7.2) and polyacrylonitrile-based thermoplastic amorphous resin (density = 1.1)
5, melt index, MI = 3.0) and ethylene-methacrylic acid random copolymer (acid content, 9 mol%,
(Density = 0.93, melt index, MI = 3.0)
Using the four types of resins described above, multilayer film forming was performed by a multilayer T-die casting method to produce a multilayer laminated heat seal material having four layers and five layers having the following layer structure. 20μ thick
m low density polyethylene layer / 5 μm thick acid anhydride graft polymerized linear low density polyethylene layer / 5 μm thickness polyacrylonitrile thermoplastic amorphous resin layer / 5 μm thickness
m anhydride-grafted linear low-density polyethylene layer / ethylene-methacrylic acid random copolymer layer having a thickness of 5 μm Next, the thickness 2 of the multilayer laminated heat seal material produced above
The surface of the low-density polyethylene layer having a thickness of 0 μm is subjected to corona treatment, and then a two-part curing type adhesive for laminating polyurethane is applied to the corona treated surface at a thickness of 3.0 g / m ² (dry). After forming an adhesive layer, a 12 μm-thick biaxially stretched polyethylene terephthalate film coated with a polyvinylidene chloride resin was dry-laminated on the surface of the adhesive layer, and laminated as follows. Body manufactured. Polyvinylidene chloride resin coat 12 μm thick biaxially stretched polyethylene terephthalate film layer / adhesive layer / 20 μm thick low density polyethylene layer / 5 μm thick acid anhydride graft polymerized linear low density polyethylene layer / Polyacrylonitrile-based thermoplastic amorphous resin layer having a thickness of 5 μm / anhydride-grafted linear low-density polyethylene layer having a thickness of 5 μm / ethylene-methacrylic acid random copolymer layer having a thickness of 5 μm

Example 6 A 12 μm thick biaxially stretched polyethylene terephthalate film having a silicon oxide vapor deposited film was coated with a urethane-based anchor coating agent at a thickness of 0.5 g / m 2 on the silicon oxide vapor deposited film surface.
² (Dry) coating to form an anchor coating agent layer and supply it as the first paper feed, while supplying 25 μm thick as the second paper feed
m of a metallocene-based α-olefin copolymer polyethylene film (density = 0.915), and the surface of the first sheet of the anchor coating agent layer and the second sheet of paper are fed to a high-pressure low-density polyethylene ( Density = 0.918, melt index,
MI = 7.0), acid anhydride graft polymerized low density polyethylene (adhesive resin, density = 0.90, melt index, MI = 4.4) and polymeta-xylene diadipamide resin (aromatic nylon resin) Manufactured by Mitsubishi Gas Chemical Industry Co., Ltd., trade name, MX-Ny, melting point, Tm = 240 ° C., melt index, MI = 7.0, relative viscosity, 2.1)
Using the three kinds of resins described above, an extruded resin layer having the following layer constitution is used as a sand layer by a multilayer co-extrusion laminating method, and the surface of the sand layer facing the first sheet is subjected to ozone treatment. Laminate molding was performed while producing a multilayer laminated heat seal material having the following layer structure B. A: Low-density polyethylene layer having a thickness of 5 μm / acid anhydride graft-polymerized low-density polyethylene layer having a thickness of 5 μm / thickness of 5 μm
m polymethaxylene diadipamide resin layer / thickness 5 μm
Anhydride graft polymerization of low density polyethylene layer / thickness 5
μm low-density polyethylene layer B: Biaxially stretched polyethylene terephthalate having a thickness of 12 μm
Film / silicon oxide vapor-deposited film layer / anchor coating agent layer / low-density polyethylene layer having a thickness of 5 μm / acid anhydride graft-polymerized low-density polyethylene layer having a thickness of 5 μm / thickness of 5 μm
m polymethaxylene diadipamide resin layer / thickness 5 μm
Anhydride graft polymerization of low density polyethylene layer / thickness 5
μm low-density polyethylene layer / 25 μm thick metallocene α-olefin copolymer polyethylene film layer

Example 7 The multilayer laminated heat seal material produced in Example 2 was used
A low-density polyethylene layer having a thickness of 30 μm was superposed on each other, and the two layers were heat-sealed to produce a multilayer laminated heat seal material having the following layer structure. Metallocene α-olefin copolymer polyethylene layer having a thickness of 30 μm / acid anhydride graft polymerized low density polyethylene layer having a thickness of 10 μm / saponified layer of ethylene-vinyl acetate copolymer having a thickness of 10 μm / acid having a thickness of 10 μm Anhydride graft polymerized low density polyethylene layer / thickness 30
μm low-density polyethylene layer / 30 μm-thick low-density polyethylene layer / 10 μm-thick acid anhydride graft polymerized low-density polyethylene layer / 10 μm-thick saponified layer of ethylene-vinyl acetate copolymer / 10 μm-thick Acid anhydride graft polymerized low-density polyethylene layer / metallocene-based α-olefin copolymer polyethylene layer having a thickness of 30 μm Next, the thickness of the multilayer laminated heat seal material produced above is 3
The surface of the 0 μm metallocene α-olefin copolymer polyethylene layer is corona-treated, and then a 12 μm-thick biaxially stretched polyethylene terephthalate film having an aluminum oxide vapor-deposited film on the corona-treated surface is obtained. The laminated body having the following layer structure was manufactured by dry laminating the surfaces of the vapor-deposited films of aluminum oxide to face each other. Biaxially stretched polyethylene terephthalate film layer with a thickness of 12 μm, vapor-deposited film of aluminum oxide / metallocene α-olefin copolymer polyethylene layer with a thickness of 30 μm / acid anhydride graft-polymerized low-density polyethylene layer with a thickness of 10 μm / thickness Saponified layer of ethylene-vinyl acetate copolymer having a thickness of 10 μm / anhydride graft-polymerized low-density polyethylene layer having a thickness of 10 μm / low-density polyethylene layer having a thickness of 30 μm / low-density polyethylene layer having a thickness of 30 μm / thickness of 10 μm
Anhydride-grafted low density polyethylene layer / thickness 1
0 μm saponified layer of ethylene-vinyl acetate copolymer /
10 μm thick acid anhydride graft polymerized low density polyethylene layer / 30 μm thick metallocene α-olefin copolymer polyethylene layer

Comparative Example 1 High-pressure low-density polyethylene (density = 0.924, melt index, MI = 0.8) and acid anhydride graft-polymerized low-density polyethylene (adhesive resin, density = 0.92)
4, melt index, MI = 1.5), and formed into a multi-layer film by multi-layer inflation method. -Lumber was manufactured. 10 μm thick low density polyethylene layer / 10 μm thick acid anhydride graft polymerized low density polyethylene layer / 10 μm thick low density polyethylene layer / 10 μm thick acid anhydride graft polymerized low density polyethylene layer / 10 μm thick Low density polyethylene layer Next, the thickness 1 of the multilayer laminated heat seal material produced above
One surface of the low-density polyethylene layer having a thickness of 0 μm is subjected to corona treatment, and then an adhesive for two-component curing type polyurethane laminating is applied to the corona treated surface at a thickness of 3.0 g / m ² (dry). To form an adhesive layer. Thereafter, a biaxially stretched polyethylene terephthalate having a thickness of 12 μm was formed on the surface of the adhesive layer.
The resulting film was dry-laminated to produce a laminate having the following layer structure. 12 μm thick biaxially oriented polyethylene terephthalate film layer / adhesive layer / thickness 10
low-density polyethylene layer having a thickness of 10 μm / anhydride graft polymerization having a thickness of 10 μm / low-density polyethylene layer having a thickness of 10 μm / low-density polyethylene layer having a thickness of 10 μm / graft-polymerized low-density polyethylene layer having a thickness of 10 μm / low density having a thickness of 10 μm Polyethylene layer

Comparative Example 2 High-pressure low-density polyethylene (density = 0.92, melt index, MI = 0.6) and acid anhydride-grafted linear low-density polyethylene (adhesive resin, density = 0.9)
1, melt index, MI = 3.5) and metallocene α-olefin copolymer polyethylene (density = 0.
92, melt index, MI = 2.0), and formed into a multi-layer film by the multi-layer inflation method. -Lumber was manufactured. Low-density polyethylene layer having a thickness of 30 μm / anhydride graft-polymerized low-density polyethylene layer having a thickness of 10 μm / low-density polyethylene layer having a thickness of 10 μm / graft-polymerized low-density polyethylene layer having a thickness of 10 μm / thickness of 30 μm Metallocene α-olefin copolymer polyethylene layer Next, the thickness 3 of the multilayer laminated heat seal material produced above
While extruding the low-density polyethylene to a thickness of 20 μm on the surface of the 0-μm low-density polyethylene layer, a 12-μm-thick biaxially stretched polyethylene terephthalate film having a silicon oxide vapor-deposited film is coated with the silicon oxide vapor-deposited film. A laminate having the following layer structure was produced by facing and sandwiching. Biaxially stretched polyethylene terephthalate film layer with a thickness of 12 μm, vapor-deposited layer of silicon oxide / low-density polyethylene extrusion layer with a thickness of 20 μm / thickness of 30
low-density polyethylene layer having a thickness of 10 μm / anhydride graft-polymerized 10 μm-thick low-density polyethylene layer / low-density polyethylene layer having a thickness of 10 μm / graft-polymerized low-density polyethylene having a thickness of 10 μm / metallocene system having a thickness of 30 μm α-olefin copolymer polyethylene layer

Comparative Example 3 High-pressure low-density polyethylene (density = 0.92, melt index, MI = 0.6) and acid anhydride graft-polymerized low-density polyethylene (adhesive resin, density = 0.924;
Melt index, MI = 1.5) and acid anhydride graft polymerized linear low density polyethylene (adhesive resin, density = 0.91, melt index, MI = 3.5),
Acid anhydride graft polymerized ethylene-vinyl acetate copolymer (adhesive resin, density = 0.93, melt index,
MI = 0.7) and an ethylene-vinyl acetate copolymer (vinyl acetate content 6 mol%, density = 0.93, melt index, MI = 1.0), and a multilayer inflation. A multi-layer heat-seal material having five layers and seven layers having the following layer constitutions was produced by a multi-layer film molding method. Low-density polyethylene layer having a thickness of 5 μm / anhydride graft-polymerized low-density polyethylene layer having a thickness of 5 μm / low-density polyethylene layer having a thickness of 5 μm / thickness of 5 μm
Anhydride anhydride-grafted linear low-density polyethylene layer of
5 μm thick ethylene-vinyl acetate copolymer layer / thickness 5
μm acid anhydride graft-polymerized ethylene-vinyl acetate copolymer layer / 5 μm-thick ethylene-vinyl acetate copolymer layer Next, the thickness of the multilayer laminated heat seal material prepared above was 5 μm.
On the surface of the low-density polyethylene layer having a thickness of 20 μm, a low-density polyethylene was extruded to a thickness of 20 μm, and a 20 μm-thick biaxially-stretched polypropylene film coated with a polyvinylidene chloride resin was subjected to sand lamination. Was produced. Polyvinylidene chloride resin coat biaxially oriented polypropylene film with a thickness of 20 μm / low density polyethylene extrusion layer with a thickness of 20 μm / low density polyethylene layer with a thickness of 5 μm / acid anhydride graft polymerized low density polyethylene layer with a thickness of 5 μm / Low-density polyethylene layer having a thickness of 5 μm / anhydride graft polymerization having a thickness of 5 μm Linear low-density polyethylene layer / ethylene-vinyl acetate copolymer layer having a thickness of 5 μm / graft-polymerized ethylene having a thickness of 5 μm Vinyl acetate copolymer layer / Ethylene-vinyl acetate copolymer layer having a thickness of 5 μm

Comparative Example 4 High pressure method low density polyethylene (density = 0.92, melt index, MI = 4.5) and acid anhydride graft polymerized low density polyethylene (adhesive resin, density = 0.90, melt index) , MI = 4.4) and acid anhydride graft polymerized polypropylene (adhesive resin, density = 0.91,
Using four types of resins, melt index, MI = 3.0) and random copolymerized polypropylene (density = 0.90, melt index, MI = 7.0), forming a multilayer film by multilayer T die casting method Was carried out to produce a multilayer laminated heat seal material having four layers and five layers having the following layer constitution. Low-density polyethylene layer with a thickness of 5 μm / thickness of 5 μm
m low-density polyethylene layer having a thickness of 5 μm / low-density polyethylene layer having a thickness of 5 μm / anhydride graft-polymerized polypropylene layer having a thickness of 5 μm / random copolymerized polypropylene layer having a thickness of 5 μm While extruding the low-density polyethylene to a thickness of 20 μm on the surface of the low-density polyethylene layer having a thickness of 5 μm of the laminated heat seal material, a biaxially stretched nylon film having a thickness of 15 μm was subjected to sand lamination to obtain the following layer. A laminate having the configuration was manufactured. 15 μm thick biaxially stretched nylon film layer / 20 μm thick low density polyethylene extruded layer / 5 μm thick
m low density polyethylene layer / 5 μm thick acid anhydride graft polymerized low density polyethylene layer / 5 μm thick low density polyethylene layer / 5 μm thick acid anhydride graft polymerized polypropylene layer / 5 μm thick random copolymer Polypropylene layer

Comparative Example 5 High-pressure low-density polyethylene (density = 0.929, melt index, MI = 3.0) and acid anhydride-grafted linear low-density polyethylene (adhesive resin, density = 0.29)
888, melt index, MI = 7.2) and an ethylene-methacrylic acid random copolymer (acid content, 9 mol%, density = 0.93, melt index, MI = 3.
Using the three types of resin (0), multilayer film forming was performed by a multilayer T-die casting method to produce a three-layer, five-layer, multilayer laminated heat seal material having the following layer structure. Thickness 2
0 μm low density polyethylene layer / 5 μm thick acid anhydride graft polymerized linear low density polyethylene layer / 5 μm thickness
Low-density polyethylene layer / 5 μm-thick acid anhydride-grafted linear low-density polyethylene layer / 5 μm-thick ethylene-methacrylic acid random copolymer layer Next, the multilayer laminated heat seal prepared above Material thickness 2
The surface of the low-density polyethylene layer having a thickness of 0 μm is subjected to corona treatment, and then a two-part curing type adhesive for laminating polyurethane is applied to the corona treated surface at a thickness of 3.0 g / m ² (dry). After forming an adhesive layer, a 12 μm-thick biaxially stretched polyethylene terephthalate film coated with a polyvinylidene chloride resin was dry-laminated on the surface of the adhesive layer, and laminated as follows. Body manufactured. Polyvinylidene chloride resin coat 12 μm thick biaxially stretched polyethylene terephthalate film layer / adhesive layer / 20 μm thick low density polyethylene layer / 5 μm thick acid anhydride graft polymerized linear low density polyethylene layer / Low-density polyethylene layer with a thickness of 5 μm / acid anhydride graft polymerized linear low-density polyethylene layer with a thickness of 5 μm / thickness 5 μm
m-ethylene-methacrylic acid random copolymer layer

COMPARATIVE EXAMPLE 6 A biaxially stretched polyethylene terephthalate film having a thickness of 12 μm having a deposited silicon oxide film was coated with a urethane-based anchor coating agent at a thickness of 0.5 g / m 2 on the deposited silicon oxide film.
² (Dry) coating to form an anchor coating agent layer and supply it as the first paper feed, while supplying 25 μm thick as the second paper feed
m of a metallocene-based α-olefin copolymer polyethylene film (density = 0.915), and the surface of the first sheet of the anchor coating agent layer and the second sheet of paper are fed to a high-pressure low-density polyethylene ( Density = 0.918, melt index,
MI = 7.0) and two kinds of resins, an acid anhydride graft polymerized low density polyethylene (adhesive resin, density = 0.90, melt index, MI = 4.4), and a multilayer co-extruded lamine The multilayer resin having the following layer configuration is formed by performing the ozone treatment on the surface of the extruded resin layer having the layer configuration of the following A as a sand layer while performing the ozone treatment on the surface of the sand layer opposite to the first sheet feeding method. A laminated heat seal material was manufactured. A: Low-density polyethylene layer having a thickness of 5 μm / acid anhydride graft-polymerized low-density polyethylene layer having a thickness of 5 μm / thickness of 5 μm
m low-density polyethylene layer / 5 μm-thick acid anhydride graft polymerized low-density polyethylene layer / 5 μm-thick low-density polyethylene layer
Film / silicon oxide vapor-deposited film layer / anchor coating agent layer / low-density polyethylene layer having a thickness of 5 μm / acid anhydride graft-polymerized low-density polyethylene layer having a thickness of 5 μm / thickness of 5 μm
m low density polyethylene resin layer / 5 μm thick acid anhydride graft polymerized low density polyethylene layer / 5 μm thick low density polyethylene layer / 25 μm thick metallocene α-olefin copolymer polyethylene film layer

Comparative Example 7 The multilayer laminated heat seal material produced in Comparative Example 2 was
A low-density polyethylene layer having a thickness of 30 μm was superposed on each other, and the two layers were heat-sealed to produce a multilayer laminated heat seal material having the following layer structure. 30 μm thick metallocene α-olefin copolymer polyethylene layer / 10 μm thick acid anhydride graft polymerized low density polyethylene layer / 10 μm thick low density polyethylene layer / 10 μm thick acid anhydride graft polymerized low density polyethylene Layer / low-density polyethylene layer 30 μm thick / low-density polyethylene layer 30 μm thick / thickness 1
0 μm acid anhydride graft polymerized low density polyethylene layer /
Low-density polyethylene layer having a thickness of 10 μm / anhydride-grafted low-density polyethylene layer having a thickness of 10 μm / thickness of 30
μm metallocene α-olefin copolymer polyethylene layer Next, the thickness of the multi-layer laminated heat seal material produced above was 3 μm.
The surface of the 0 μm metallocene α-olefin copolymer polyethylene layer is corona-treated, and then a 12 μm-thick biaxially stretched polyethylene terephthalate film having an aluminum oxide vapor-deposited film on the corona-treated surface is obtained. The laminated body having the following layer structure was manufactured by dry laminating the surfaces of the vapor-deposited films of aluminum oxide to face each other. Biaxially stretched polyethylene terephthalate film layer with a thickness of 12 μm, vapor-deposited film of aluminum oxide / metallocene α-olefin copolymer polyethylene layer with a thickness of 30 μm / acid anhydride graft-polymerized low-density polyethylene layer with a thickness of 10 μm / thickness Low-density polyethylene layer 10 μm in thickness / thickness 10 μm
m low-density polyethylene layer having a thickness of 30 μm / low-density polyethylene layer having a thickness of 30 μm / low-density polyethylene layer having a thickness of 30 μm / graft-polymerized low-density polyethylene layer having a thickness of 10 μm / low-density having a thickness of 10 μm Polyethylene layer / acid anhydride graft polymerized low density polyethylene layer having a thickness of 10 μm / metallocene α-olefin copolymer polyethylene layer having a thickness of 30 μm

EXPERIMENTAL EXAMPLE Next, using the laminates manufactured in Examples 1 to 7 and Comparative Examples 1 to 7, first, the laminates were punched to produce blank plates, Parts 210-250
Under a heat welding condition of 3 to 5 kg / cm ² for 3 to 5 seconds in a temperature range of about 0 ° C., heat sealing was performed so that the heat-sealing layer was on the inner side, and the diameter was 35 mm and the height was 35 mm. A cylindrical body serving as a body of a tube container having a thickness of 160 mm was manufactured. Next, the cylindrical body manufactured as described above is mounted on a mandrel for forming a tube container, and then, at one end of the cylindrical body, a frustoconical shoulder portion and a narrow neck opening continuous therewith are formed in a conventional manner. The head consisting of the neck was molded by compression molding at a resin temperature of 245 ° C. using a high-density polyethylene composition obtained by adding 2.0% by weight of an opalescent pigment to 98.0 parts by weight of high-density polyethylene. Next, a cap is spirally wound on the mouth and neck of the cylinder having the above-mentioned head, and then the cylinder is removed from the mandrel, and then, from the other opening of the cylinder, a commercially available toothpaste 15 is used.
0 g, and then the opening of the cylinder was heat-sealed.
I did. Next, each of the tube packages produced above was
After storing at 0 ° C. for 2 weeks, the lamination strength of the tube container was measured, and the contents were organoleptically evaluated for the fragrance retention. The results are shown in Table 1 below. In addition, the above-mentioned tube
The laminate strength of the container was measured at a peeling speed of 50 mm / min using a constant-speed extension type tensile tester. The sensory evaluation of the fragrance retention of the contents was evaluated by a taste test using a panel.

[0041]

[Table 1] In Table 1 above, the percentage of residual laminate strength is the ratio of the laminate strength after storage to the laminate strength before filling the contents, and in the fragrance retention, ◎ indicates the fragrance of the contents. Means that the content has hardly changed, ○ means a slight decrease in the content aroma, Δ means a significant decrease in the content aroma, and × means the content is altered and produces an off-flavor. Means that

As is evident from the above results, the multilayer laminated heat seal material, the laminate, and the packaging container according to the present invention all show good results and are practically usable. Was.

[0043]

As is apparent from the above description, the present invention provides a first heat-sealing layer, an intermediate layer, and a second heat-sealing layer in this order. The first and second heat sealable layers are laminated as outermost layers to form a multi-layer laminated heat seal.
And then a first layer of the multilayer laminated heat seal material.
Alternatively, at least one substrate film is laminated on one surface of the second heat-sealing layer to produce a laminate, and further, the laminate is used, and the other heat-sealing layer is used. A sealing container is manufactured by heat-sealing the outer peripheral edge of the sealing layer so as to form a seal portion, and the opening of the packaging container is formed. From the department, for example, filling and packaging various contents such as food and drink, pharmaceuticals, cosmetics, detergents, chemicals, miscellaneous goods, etc., to produce various packaged products, multi-layer laminated heat seal material Alternatively, the laminate has excellent laminating strength, little phenomenon such as delamination is observed, and the intermediate layer also shields the permeation of the fragrance-retaining components and the like in the contents. Extremely useful, showing fragrance performance, no accompanying delamination phenomenon, and no leakage of contents Multilayer laminated heat - tosylate - sealing material, it is that it can be produced a laminate and packaging containers used.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a layer configuration of a multilayer laminated heat seal material according to the present invention.

FIG. 2 is a schematic cross-sectional view showing a layer configuration of a multilayer laminated heat seal material according to the present invention.

FIG. 3 is a schematic sectional view showing a layer structure of a laminate according to the present invention manufactured using the multilayer laminated heat seal material shown in FIG. 1 or FIG.

FIG. 4 is a schematic perspective view showing a configuration of a packaging container according to the present invention manufactured using the laminate shown in FIG. 3;

FIG. 5 is a schematic perspective view showing a configuration of a packaged product in which contents are filled and packed using the packaging container shown in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st heat sealing layer 2 Intermediate layer 3 2nd heat sealing layer 4 Adhesive resin layer 4a Adhesive resin layer 5 Base film 6 Seal part 7 Contents 8 Top seal -Seal part A Multi-layer laminated heat seal material B Multi-layer laminated heat seal material C Laminated body D Packaging container E Packaging product

──────────────────────────────────────────────────続 き Continued on front page (51) Int.Cl. ⁶ Identification symbol FI // B29C 55/28 B29C 55/28

Claims (15)

[Claims] 1. A first heat-sealing layer, an intermediate layer, and a second heat-sealing layer, and further comprising a first and a second heat-sealing layer. A multilayer laminated heat seal material characterized by being laminated as an outermost layer. 2. The multi-layer laminated heat sink according to claim 1, wherein the first heat sealable layer and the second heat sealable layer are made of the same material. -Sealing material. 3. The multilayer according to claim 1, wherein the first heat-sealing layer and the second heat-sealing layer are made of a polyethylene resin. Laminated heat seal material. 4. The multi-layer laminated heat sink according to claim 1, wherein said first heat sealable layer and said second heat sealable layer are made of different materials. -Sealing material. 5. The above-mentioned claim, wherein the first heat-sealing layer and the second heat-sealing layer are made of a polyethylene resin and an ethylene-vinyl acetate copolymer. Item 5. The multilayer laminated heat seal material according to item 1 or 4. 6. The above-mentioned claim, wherein the first heat-sealing layer and the second heat-sealing layer are made of a polyethylene resin and an ethylene-methacrylic acid copolymer. Item 5. The multilayer laminated heat seal material according to item 1 or 4. 7. The multilayer laminated heat seal material according to claim 1, wherein the intermediate layer is made of a fragrance-retaining resin. 8. The method according to claim 1, wherein the intermediate layer is made of a saponified ethylene-vinyl acetate copolymer, a polyamide resin, a polyacrylonitrile resin, or a polyester resin. 1, 2, 3, 4,
8. The multilayer laminated heat seal material according to 5, 6, or 7. 9. The method according to claim 1, wherein the first heat-sealing layer, the intermediate layer, and the second heat-sealing layer are formed by multilayer inflation molding. Item 1,
2. The multilayer laminated heat seal material described in 2, 3, 4, 5, 6, 7 or 8. 10. The above-mentioned claim, wherein the first heat-sealing layer, the intermediate layer, and the second heat-sealing layer are formed by multilayer T-die casting. Item 1,
2. The multilayer laminated heat seal material described in 2, 3, 4, 5, 6, 7 or 8. 11. The method according to claim 1, wherein the first heat-sealing layer, the intermediate layer, and the second heat-sealing layer are formed by multilayer co-extrusion laminating. The multilayer laminated heat seal material according to claim 1, 2, 3, 4, 5, 6, 7, or 8. 12. A multi-layer inflation molding, a multi-layer T die-cast molding, or a multi-layer inflation molding between each of the first heat-sealing layer, the intermediate layer and the second heat-sealing layer. 2. The method according to claim 1, wherein the layers are laminated via an extruded adhesive resin layer of a multi-layer co-extruded laminate.
2. The multilayer laminated heat seal material described in 2, 3, 4, 5, 6, 7, 8, 9, 10 or 11. 13. The multilayer laminated heat seal material according to claim 12, wherein the extruded adhesive resin layer is made of an acid-modified polyolefin resin. 14. A first heat-sealing layer, an intermediate layer, and a second heat-sealing layer, and further comprising a first and a second heat-sealing layer. Is formed by laminating at least a base film on one surface of either the first or second heat-sealing layer of a multilayer laminated heat-sealing material obtained by laminating the above as the outermost layer. A laminate, characterized in that: 15. A first heat-sealing layer, an intermediate layer, and a second heat-sealing layer, and further comprising a first and a second heat-sealing layer. Is formed by laminating at least a base film on one surface of either the first or second heat-sealing layer of a multilayer laminated heat-sealing material obtained by laminating the above as the outermost layer. It is characterized in that a laminate is used, the other heat-sealable layers are overlapped with each other facing each other, and furthermore, an edge around the outer periphery is heat-sealed to provide a seal. Packaging containers.