| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a salvageable and reusable container having gas barrier properties by forming a multi-layered sheet having a specified ethylene modifying degree, wherein a layer composed of a water-soluble ethylene-modified polyvinyl alcohol and a layer composed of a thermoplastic resin are co-extruded and laminated. SOLUTION: A container is obtained by forming a multi-layered sheet composed of a thermoplastic resin such as a polyester resin, a polypropylene resin or the like. The container has a gas barrier properties and can be salvaged and reused after using by separating a thermoplastic resin layer and a barrier layer. The multi-layered sheet having an ethylene modifying degree of 1-20 mol.%, wherein a layer composed of a water-soluble ethylene-modified polyvinyl alcohol and a layer composed of the thermoplastic resin are laminating, by co-extrusion laminating or thermally melting laminating, are used for the container. A multi-layered container is obtained by molding the multi-layered sheet, wherein at least a part of the multi-layered sheet is stretched 1.2 times or higher, preferably 2.0 times or higher before or during the molding.</p> |
