发明名称 |
Biaxially drawn polyhexamethylene adipamide film |
摘要 |
Provided is a biaxially drawn film composed substantially of polyhexamethylene adipamide, which has a refractive index of at least 1.560 in both the longitudinal direction and the transverse direction and an ultraviolet absorbance E268 of not more than 0.4, as measured at a wavelength of 268 m mu on a film solution in formic acid. The film preferably exhibits a shrinkage factor of not more than 5% in both the longitudinal direction and the transverse direction, as measured after dipping in hot water at 135 DEG C. for 10 minutes. The film is prepared by heat-treating a biaxially drawn polyhexamethylene adipamide film in an inert gas atmosphere at a temperature higher than the drawing temperature employed but lower than the melting point of the film.
|
申请公布号 |
US4370468(A) |
申请公布日期 |
1983.01.25 |
申请号 |
US19800204276 |
申请日期 |
1980.11.05 |
申请人 |
ASAHI KASEI KOGYO KABUSHIKI KAISHA |
发明人 |
NAKAJIMA, OSAMU;MATSUOKA, YUKINORI;NAKAYAMA, YOSHIAKI |
分类号 |
B65D65/02;B29C49/00;B29C55/00;B29C55/12;B29C59/00;(IPC1-7):C08G69/46 |
主分类号 |
B65D65/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|