| 摘要 |
PROBLEM TO BE SOLVED: To obtain a polyamide stretched film excellent in gas barrier properties, pinhole resistance, flexibility and impact resistance and reduced in the variation of film width and thickness irregularity. SOLUTION: When a multilayered film, which is composed of a layer based on a polyamide resin obtained using meta-xylylenediamine and a 6-12Cα,ω-aliphatic dicarboxylic acid as main raw materials and a layer based on an aliphatic polyamide resin, is manufactured by a roll/tenter type sequential biaxially stretching method, the temperature of a longitudinal stretching roll, the temperature of a cooling roll after longitudinal stretching and a lateral stretching temperature are controlled to a specific range. A biaxially stretched film is obtained by the manufacturing method. COPYRIGHT: (C)2008,JPO&INPIT |
