| 摘要 |
PURPOSE:To produce the titled film having uniform microirregularities of the order of micron over the entire surface, by forming a specified PP resin into a film. CONSTITUTION:A starting crystalline PP resin prepared so that a half of its crystallization time at a crystallization temperature of 129.5-130.5 deg.C may be 12-45min is formed into a film by a tube blowing or cell expansion method. |
