JPS6123396Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a laminated material that has gas barrier properties equivalent to a laminated material using aluminum foil and has excellent deep pattern formability.

Conventionally, molded containers with excellent gas barrier properties have generally been cold-formed from laminated materials made of aluminum foil and thermally bonded materials.

This laminated material is cold formed so the aluminum foil is 50%
A material with a thickness of ~500μ had to be used, resulting in an expensive product.

For this reason, there has been a strong desire for the emergence of an inexpensive material that is comparable in price to aluminum foil.

On the other hand, it would have been appropriate to use plastic film with aluminum vapor-deposited as a substitute for aluminum foil, but when molded with deep marks, the luster of aluminum was comparable to that of aluminum foil, but Physical properties such as permeability are inferior to containers using aluminum foil, so general aluminum vapor-deposited films were not satisfactory.

The present invention eliminates the above-mentioned drawbacks, and is a laminated material comparable to aluminum foil laminated materials despite being an aluminum vapor-deposited film.

The present invention will be described in detail below with reference to the drawings.

In the present invention, as shown in FIG. 1, an aluminum vapor-deposited layer 3 is provided on the lower surface of a biaxially stretched vinylon film 1 via an anchor coat layer 2, and an ink layer 4 and an adhesive layer 5 are provided on the vapor-deposited layer 3 side. A heat-resistant film 6 is laminated.

On the other hand, it is a laminated material in which a heat seal layer 8 is provided on the biaxially stretched vinylon film 1 side of the vapor-deposited film with an adhesive layer 7 interposed therebetween.

The anchor coat layer 2 used in the present invention is provided to improve the heat resistance of the biaxially oriented vinylon film, reduce unevenness during vapor deposition processing, and increase the adhesive strength between the aluminum vapor deposited layer and the biaxially oriented vinylon film. Two-component type resins are suitable.

Further, as the heat-resistant film 6, unstretched polypropylene film, polyethylene phthalate film, polyvinyl chloride film, unstretched nylon film, stretched polystyrene film, stretched nylon film is used, and as the heat seal layer 8, low density polyethylene film, High-density polyethylene film, unstretched polypropylene film, and ionomer film are used.

Further, as the adhesive layers 3 and 7, a heat-resistant two-component polyurethane adhesive is preferable.

When a yellow transparent ink is used as the ink layer 4, the entire surface becomes golden, resulting in an excellent appearance.

Since the packaging material of the present invention has the above-mentioned structure, it can be sufficiently formed even when deep pattern forming is performed using the conventional vacuum forming method or pressure forming method. Since a biaxially stretched vinylon film was used as the container, the corner portions of the container did not become thin and the gas barrier properties did not deteriorate.

Next, a specific example of forming a container using the laminated material of the present invention will be described.

An ink layer of vinyl chloride-vinyl acetate yellow transparent ink on the bottom surface of the aluminum evaporated layer through an anchor coat layer of two-component vinyl resin on the bottom surface of the biaxially stretched vinylon film (15μ), and a two-component polyurethane-based ink layer on the bottom surface of the aluminum vapor-deposited layer. Provide a mold adhesive layer and unstretched polypropylene film (50μ).

On the other hand, a laminated material in which an unstretched polypropylene film (400 μm) was provided on the upper surface of a biaxially stretched vinylon film via a two-component polyurethane adhesive layer was air-formed to obtain a deep-spotted container.

For molding, the above laminated material was heated to 155°C for seconds using a pressure molding machine manufactured by Omori Kikai Kogyo Co., Ltd., and then heated to a pressure of 3Kg/cm ²
It was molded in 2 seconds.

The physical properties of this molded container are as follows.

Container surface area 138cm ^2Oxygen permeability 0.004~0.008cc/1 piece 24hrs Measurement conditions Mocon method 20℃~25℃, 40%~70%RH Water vapor permeability 0.0055g/1 piece 24hrs Measurement conditions Cupp method Temperature and humidity 40℃, 90%

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention. 1... Biaxially stretched vinylon film, 2... Anchor coat layer, 3... Vapor deposition layer, 4... Ink layer,
5, 7...Adhesive layer, 6...Heat-resistant film, 8
...Heat seal layer.

Claims (1)

[Claims for Utility Model Registration] (1) A heat-resistant film is applied to the lower surface of the biaxially stretched vinylon film via an anchor coat layer, an aluminum vapor deposited layer and an adhesive layer, while an adhesive is applied to the upper surface of the biaxially stretched vinylon film. A laminated material with a heat seal layer interposed between the layers. (2) The laminate material according to claim 1, in which the anchor coat layer 2 is made of a two-component vinyl resin.