发明申请
- 专利标题: Polarizing Plate Protective Film, Film Producing Method, Polarizing Plate, and Liquid Crystal Display
- 专利标题(中): 偏光板保护膜,膜生产方法,偏光板和液晶显示器
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申请号: US12086112申请日: 2006-12-01
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公开(公告)号: US20090135345A1公开(公告)日: 2009-05-28
- 发明人: Takatoshi Yajima , Takashi Murakami
- 申请人: Takatoshi Yajima , Takashi Murakami
- 优先权: JP2005-357809 20051212
- 国际申请: PCT/JP2006/324051 WO 20061201
- 主分类号: G02F1/1335
- IPC分类号: G02F1/1335 ; G02B1/08 ; B29C67/00
摘要:
Disclosed is a method for production of a film, which comprises the steps of: extruding a molted material containing a cellulose resin on a cooling roll from a die in a film-like form at a draw ratio ranging from 10 to 30 inclusive; pressing the extruded molted film on the cooling roll with a touch roll; and transferring the molted film while solidifying the film on the cooling roll, wherein the touch roll has a metal-made outer cylinder, an inner cylinder, and a space for accommodating a cooling medium between the metal-made outer cylinder and the inner cylinder and also has a touch roll linear pressure ranging from 1 to 15 kg/cm inclusive during pressing with the touch roll.
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