JPH0356359Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention mainly relates to tube containers filled with fluids or semi-fluids such as toothpaste, cosmetics, wasabi, mustard, and other paste-like products. It relates to a laminated material molded into a body.

[Prior Art] The container body of a tube container filled with a fluid or semi-fluid is required to have gas gallant properties and a design effect, and is usually printed. A laminate material whose base material is a milky white polyethylene resin film layer with a marking, for example, a polyethylene layer/a base material consisting of a milky white polyethylene layer with a printing mark/a polyethylene layer/
Laminated materials with a laminated structure consisting of paper layer/polyethylene layer/Al foil/polyethylene layer are commonly used.

[Problems to be solved by the invention] By the way, in the conventional laminated material for forming the body of a tube container, printing is applied to the surface of the milky white polyethylene resin layer to which pigment is added to enhance the design effect. However, it is not possible to obtain a printed pattern that exhibits a clear printing effect.

That is, the milky white polyethylene resin layer has a low surface smoothness due to the inherent properties of the polyethylene resin layer itself and the fact that the resin layer contains a pigment, and therefore, it is difficult to improve the design effect. The printed layer attached to it is not clear,
Moreover, since the printed layer is a printed layer formed by surface printing, a beautiful hot peeling effect cannot be expressed in the printed layer.

Furthermore, since the conventional laminated materials are mainly composed of polyethylene resin, they also have drawbacks such as insufficient heat resistance, pressure resistance, bag breakage resistance, etc. of the tube container bodies obtained.

On the other hand, the present invention not only produces a design effect through clear printing, but also has excellent properties such as heat resistance, pressure resistance, and bag breakage resistance.
To provide a laminate material for forming the body of a tube container, which exhibits an excellent effect on the heat sealability of the body of the tube container obtained.

[Means for Solving the Problems] In the drawings, the laminate material for forming the body of an extruded tube container of the present invention has a printed layer on one side of a biaxially oriented polyester film, a biaxially oriented nylon film, or a biaxially oriented polypropylene film. 2,
A transparent biaxially stretched film formed with 2, .
and a thermoplastic resin layer 7 are laminated, and the non-printing surface of the base material 1 is formed of a thermoplastic resin that can be heat-sealed with the thermoplastic resin layer 7. It is made of a laminated material on which a protective layer 8 is laminated. The laminated material having such a laminated structure is constructed such that the protective layer 8 of the laminated material becomes the outer peripheral surface layer of the tube container body, and the thermoplastic resin layer 7 becomes the inner peripheral surface layer of the tube container body. A predetermined tube container body is formed in this manner.

In addition, in the above-mentioned drawings, the code 3 indicates the base material 1.
5 is an adhesive layer that adheres the printed surface of the paper layer 4 to the paper layer 4, and reference numeral 5 is an adhesive layer that adheres the paper layer 4 and the Al foil 6.

The base material 1 of the laminate material for forming the body of an extruded tube container of the present invention having the above structure is a transparent biaxially oriented resin film made of a biaxially oriented polyester film, a biaxially oriented nylon film, or a biaxially oriented polypropylene film. is used,
The printing layer 2 attached to one side of the base material 1 has characters,
It is a figure, etc., and is formed using ordinary printing ink, for example, by printing means such as offset, gravure, screen, and flexography.

Paper layer 4 laminated on the printing surface of the base material 1
For example, glassine paper, kraft paper, imitation paper, synthetic paper, etc. with a basis weight of about 20 to 70 g/m ² is used, and the base material 1 and the paper layer 4 are interposed between them. The adhesive layer 3 is laminated using an adhesive layer 3 made of, for example, polyolefin, polyvinyl chloride, acrylic resin, vinyl acetate resin, epoxy resin, rubber derivative urethane resin, or the like. Note that the adhesive layer 3 is formed by, for example, an extrusion coating method, a film lamination method, or a liquid coating method.

Furthermore, the Al foil 6 laminated on the paper layer 4 is
In view of the relationship between the gas barrier performance imparted to the laminated material and the extrusion suitability of the tube container formed from the laminated material, a thickness within the range of 7 to 15 μm is used.

Note that for laminating the paper layer 4 and the Al foil 6, the same adhesive as in the case of laminating the base material 1 and the paper layer 4 described above can be used; Adhesives based on polyolefin resins, such as ethylene-acrylic acid copolymers and ionomers, are suitable.

Further, the thermoplastic resin layer 7 laminated on the Al foil 6 is a resin layer that will become the inner peripheral surface layer of the tube container body formed by the laminated material of the present invention, and includes, for example, polyethylene, polypropylene, polybutene, etc. Poly 4-methyl pentene-1, ethylene-
Polyolefins such as vinyl acetate copolymer, ethylene-acrylic acid copolymer, ionomer, ethylene-α-olefin copolymer, maleic anhydride grafted polyolefin, saponified ethylene-vinyl acetate copolymer, etc., as well as nylon and polyester. , single resin layer made of polycarbonate, polyvinyl chloride, acrylic resin, polystyrene, etc.
Alternatively, it consists of two or more multilayer resin layers. The thermoplastic resin layer 7 is formed to a thickness of about 10 to 100 μm by, for example, an extrusion coating method or a lamination method using a necessary adhesive.

Furthermore, the protective layer 8 made of a thermoplastic resin laminated on the non-printing surface of the base material 1 made of a biaxially oriented polyester film, a biaxially oriented nylon film, or a biaxially oriented polypropylene film is the thermoplastic resin layer 7 described above. Materials that can be laminated on the surface by heat and pressure, such as polyethylene, polypropylene, poly4-methylpentene-1, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ionomer, ethylene-α-olefin copolymer, etc. Polyolefins such as polymers, maleic anhydride grafted polyolefins, saponified ethylene-vinyl acetate copolymers, nylon, polyesters, polycarbonates, polyvinyl chloride, polyvinylidene chloride, acrylic resins, polystyrene,
As a transparent single resin layer made of polyurethane or the like, or as a multilayer resin layer of two or more layers, for example, by extrusion coating method, lamination method, liquid coating method,
It is formed to a thickness of about 10-100u.

[Example] Hereinafter, the specific structure of the laminate material for forming the body of an extruded tube container of the present invention will be described with reference to Examples.

Example 1 A biaxially stretched polyethylene terephthalate film with a thickness of 12 μm was subjected to printing improvement treatment by corona discharge treatment, and a colored printing layer 2 was formed on the treated surface using a polyurethane gravure printing ink to obtain a substrate 1. A glassine paper 4 having a basis weight of 42 g/m ² was laminated on the printed surface of the polyethylene tereft film using an adhesive layer 3 made of an extruded resin layer of polyethylene resin.

Further, on the surface of the glassine paper 4, an Al foil 6 with a thickness of 10 u is laminated using an adhesive layer 5 made of an extruded resin layer of ethylene-acrylic acid copolymer resin, and then, the Al foil 6 is laminated with a thickness of 10 u. A thermoplastic resin layer 7 of polyethylene resin having a thickness of 80 μm was formed on the surface by an extrusion coating method.

Subsequently, a urethane-based anchor coating agent {0.2 g (dry)/m ² } was applied to the non-printing surface of the biaxially oriented polyethylene terephthalate film that constituted the base material 1, and then a thickness was applied to the coated surface. By forming the protective layer 8 consisting of an extrusion coat layer of 50 μ of polyethylene resin, a laminate material for forming the body of an extruded tube container, which is an example of the present invention, was obtained.

[Operations and effects of the invention] The laminate material for forming the body of the extruded tube container of the invention is a transparent film made of biaxially oriented polyester film, biaxially oriented nylon film, or biaxially oriented polypropylene film with a printed layer attached on one side. a base material made of a resin film, a paper layer sequentially laminated on the printing surface of the base material, and a thickness of 7 to 7.
It has a 15u Al foil and a thermoplastic resin layer, and also
The non-printing surface of the base material has a laminated structure in which a protective layer made of a thermoplastic resin that can be heat-sealed to the thermoplastic resin layer is laminated on the non-printing surface of the base material, and the protective layer is formed on the outer periphery of the tube container body. Make it a surface layer,
Further, the thermoplastic resin layer is molded into a predetermined tube container body so as to become an inner peripheral surface layer of the tube container body.

In the laminate material for forming the body of a tube container of the present invention having the above structure, the printing layer related to the design effect of the tube container is formed of a base material made of biaxially oriented polyester film, biaxially oriented nylon film, or biaxially oriented polypropylene. Because it is formed by reverse printing, the printed layer on the container body that can be observed from the outside in the tube container state is a smooth printed surface pressed by a base material made of transparent biaxially stretched plastic film. Visible as layers. For this reason, compared to the design effect obtained by the printed layer of surface printing, there is no appearance of matte state caused by pigments and vehicles in the printed layer, and the printed pattern is extremely clear, resulting in a beautiful printed pattern layer. A tube container that exhibits an excellent hot peel effect is obtained.

Furthermore, since the laminated material for forming the body of the tube container of the present invention comprises a biaxially oriented polyester film, a biaxially oriented nylon film, or a biaxially oriented polypropylene film as a base material, it has excellent heat resistance and durability. A tube container body that exhibits excellent properties in terms of bag breakability, pressure resistance, etc. is obtained.

Furthermore, in the laminate material for forming the body of a tube container according to the present invention, both upper and lower outer surface layers of the laminate material are heat-fused between the thermoplastic resin layer and the thermoplastic resin layer. Since it is composed of a protective layer made of a thermoplastic resin that can be attached to the tube container, there is Since the sealing portion of the tube container body is formed using the excellent thermal adhesive properties of the tube container body, a tube container body having excellent sealing properties of the sealing portion can be obtained.

[Brief explanation of the drawing]

The figure is a cross-sectional view of a model showing one embodiment of the laminate material for forming the body of an extruded tube container according to the present invention. 1... Base material made of a transparent resin film made of biaxially oriented polyester film, biaxially oriented nylon film, or biaxially oriented polypropylene film, 2... Printing layer, 3... Adhesive layer, 4... Paper layer, 5 ... Adhesive layer, 6 ... Al foil, 7 ... Thermoplastic resin layer that will become the inner surface layer of the tube container, 8 ...
...A protective layer that forms the outer surface layer of a tube container.

Claims (1)

[Scope of utility model registration request] A base material 1 made of a transparent biaxially oriented polyester film, biaxially oriented nylon film, or biaxially oriented polypropylene film having a printed layer 2 on one side, and a paper layer 4 that is sequentially laminated on the printed surface of the base material 1. , has an Al foil 6 with a thickness of 7 to 15 μm and a thermoplastic resin layer 7, and the non-printing surface of the base material 1 has an aluminum foil 6 that can be heat-sealed to the thermoplastic resin layer 7. A tube in which a protective layer 8 formed of a thermoplastic resin is laminated, the protective layer 8 becomes the outer peripheral surface layer of the tube container body, and the thermoplastic resin layer 7 becomes the inner peripheral surface layer of the tube container body. A laminate material for forming the body of an extruded tube container, characterized in that it is formed into the body of the container.