Kureha Corporation

Ichiro Kitada

Yoshiharu Nishimoto

Shota Nambu

Tadayoshi Itoh

Hajime Tsukamoto

Provided is a heat-shrinkable multilayer film including: an outer surface layer including a thermoplastic resin; an intermediate layer including a polyamide resin; and an inner surface layer including a sealable resin; the total thickness of the heat-shrinkable multilayer film being from 95 to 160 &#x3bc;m; the thickness of the intermediate layer including the polyamide resin being from 17 to 47 &#x3bc;m; the thickness of the inner surface layer being 55 &#x3bc;m or greater; and the ratio of the thickness of the intermediate layer including the polyamide resin to the total thickness of the heat-shrinkable multilayer film being from 18 to 29%. The heat-shrinkable multilayer film of the present invention has high strength and excellent flexibility. Therefore, the heat-shrinkable multilayer film of the present invention is easily stretched and formed, and can be suitably used as a variety of packaging materials including a food packaging material.

Heat-shrinkable multilayer film

A heat-shrinkable multilayer film according to the present invention is obtained by laminating an inner surface layer that contacts contents, an adhesive layer, and an intermediate layer that is adjacent to the adhesive layer, in this order from an inner side to an outer side. The inner surface layer contains an ethylene-vinyl acetate copolymer, the adhesive layer contains an acid-modified ethylene-based copolymer, and the intermediate layer contains a polyamide-based resin.

To provide a multilayer film that enables easy opening of a packaging material manufactured by deep draw forming. A multilayer film for deep draw forming, including: a vinylidene chloride copolymer resin layer as a middle layer; a crosslinked olefin resin layer as a first surface layer; and an ethylene/vinyl acetate copolymer resin layer as a second surface layer; where the ethylene/vinyl acetate copolymer resin layer is further provided either at least between the vinylidene chloride copolymer resin layer as the middle layer and crosslinked olefin resin layer as the first surface layer, or between the vinylidene chloride copolymer resin layer as the middle layer and ethylene/vinyl acetate copolymer resin layer as the second surface layer.

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Tokyo, Japan

Ichiro Kitada