| 摘要 |
<p>PURPOSE:To prevent rottenness or deterioration of contents by improving gas barrier properties, by providing a specific polyamide resin layer between a gas barrier layer and inner surface layer or outer surface layer. CONSTITUTION:The title vessel is formed of a laminated material among a gas barrier layer 3 comprised of ethylene vinyl alcohol copolymer and an inner and outer surface layers 1, 2 consisting mainly of a propylene polymer. Noncrystalline polyamide resin layers 4, 5 whose crystalline melting amount of heat measured by a differential scanning caloriemmeter is lees than 2cal/g and the glass transition point is at least 80 deg.C are provided among the gas barrier layer 3 and surface layers 1, 2. A propylene monopolymer or ethylene containing at least 70wt.% propylene or a randam or block copolymer with the other alpha-olefin can be mentioned as a propylene copolymer constituting the inner and outer surface layers 1, 2. It is preferable that a copolymeric ratio of the ethylene of ethylene-vinyl acetate copolymer which is an initiating substance of the ethylene-vinyl alcohol copolymer constituting of the gas barrier layer 3 is 15-55mol%.</p> |
