Title:
ポリオレフィン微多孔フィルムの製造方法及び積層多孔フィルムの製造方法
Document Type and Number:
Japanese Patent JP5694971
Kind Code:
B2
Abstract:
Provided is a method for reproducibly and efficiently producing a polyolefin porous film having a porous structure suitable for a separator for a battery without requiring a special apparatus. The method according to the present invention is a method for producing a polyolefin porous film, the method including conveying a raw material polyolefin sheet having pores into a furnace of a tenter type stretching machine, and tenter-stretching the sheet in a plurality of stretching regions in the furnace to produce a polyolefin porous film, wherein the plurality of stretching regions include at least two stretching regions having different film widening speeds, and the temperature of a stretching region having a high film widening speed is lower than that of a stretching region having a low film widening speed in the at least two stretching regions, and a stretching region having the highest film widening speed is situated in the front stage with respect to a stretching region having the lowest film widening speed.
Inventors:
Daisaburo Yaho
Innan year base
Innan year base
Application Number:
JP2012024791A
Publication Date:
April 01, 2015
Filing Date:
February 08, 2012
Export Citation:
Assignee:
Sumitomo Chemical Co., Ltd.
International Classes:
C08J9/00; C08J9/36; H01M50/403; H01M50/451; H01M50/457; H01M50/489; H01M50/491
Domestic Patent References:
| JP2001162742A | ||||
| JP2000248093A | ||||
| JP2010059436A | ||||
| JP2011246659A | ||||
| JP2008214425A |
Foreign References:
| WO2006104165A1 |
Attorney, Agent or Firm:
Hisashi Kato
Takashi Kuboyama
Takashi Kuboyama