Idemitsu Petrochemical Co., Ltd.

Masahiro Akamatsu

Tohru Yukumoto

Osamu Tohya

Toyokazu Yamada

A laminated resin sheet consisting of (a) at least one layer of an ethylene-vinyl alcohol copolymeric resin (EVOH resin), (b) at least one layer of a hot-melt adhesive resin and (c) at least one layer of a polystrene-based resin, the layer (b) being interposed between the layers (a) and (c) to serve to adhesively bond them together. The laminated sheet has excellent moldability only when the EVOH resin has a thermal characteristic specified in terms of the integrated value of the peak areas in a diagram obtained by the DSC (differential scanning calorimetry) measurement in the course of temperature elevation. The sheet may be formed into a vessel having a multilayered wall structure by hot molding.

Process of shaping a vessel having a multilayered wall structure

Disclosed is a laminated resin sheet consisting of (a) at least one layer of an ethylene-vinyl alcohol copolymeric resin (EVOH resin), (b) at least one layer of a hot-melt adhesive resin and (c) at least one layer of a polystyrene-based resin, the layer (b) being interposed between the layers (a) and (c) to serve to adhesively bond them together. The laminated sheet has excellent moldability only when the EVOH resin has a thermal characteristic specified in terms of the integrated value of the peak areas in a diagram obtained by the DSC (differential scanning calorimetry) measurement in the course of temperature elevation.

Multilayered structural body

A multilayer composite and an easily openable container produced by using the multilayer composite are provided. The multilayer composite comprises a surface layer of a polyolefin resin, an intermediate layer of a mixture of a polystyrenic resin with a thermoplastic elastomer or with a thermoplastic elastomer and a polyolefin resin, and a base layer of a polystyrenic resin, and the peeling strength between the intermediate layer and the base layer is larger than the peeling strength between the surface layer and the intermediate layer. The easily openable container produced by using the multilayer composite is capable of being sealed with a lid strongly while maintaining easy openability because the opening of the sealed container is performed utilizing the peeling between the surface layer and the intermediate layer.

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Himeji, Japan

Masahiro Akamatsu