Title:
多孔性樹脂フィルムの製造方法
Document Type and Number:
Japanese Patent JP6686995
Kind Code:
B2
Abstract:
To provide a method of producing a porous resin film excellent in air permeability, having a high piercing strength, and excellent in productivity.SOLUTION: The method of producing a porous resin film using a propylene resin comprises the steps of primarily drawing an original raw film having a degree of crystal orientation in an orthogonal direction to a crystal orientation direction, and thereafter secondarily drawing it in an orthogonal direction to a primarily drawing direction.SELECTED DRAWING: None
Inventors:
Shunsuke Koichi
Tomoyuki Nemoto
Tomoyuki Nemoto
Application Number:
JP2017181544A
Publication Date:
April 22, 2020
Filing Date:
September 21, 2017
Export Citation:
Assignee:
Mitsubishi Chemical Corporation
International Classes:
B29C67/20; B29C55/14; C08J9/00
Domestic Patent References:
| JP2017171796A |
Foreign References:
| WO2012099149A1 |
Attorney, Agent or Firm:
Kenichi Hirasawa
Wataru Sasaki
Tate Ai
Wataru Sasaki
Tate Ai