Title:
多孔質ポリイミド膜の製造方法、多孔質ポリイミド膜、及びそれを用いたセパレータ
Document Type and Number:
Japanese Patent JP5745195
Kind Code:
B2
Abstract:
Provided is a method for producing a separator which has uniform and dense pores on the negative electrode surface side. A method for producing a porous polyimide film according to the present invention comprises: a first un-burned composite film forming step wherein a first un-burned composite film is formed on a substrate using a first varnish that contains (A1) a polyamide acid or a polyimide and (B1) fine particles at a volume ratio (A1):(B1) of from 19:81 to 45:65; a second un-burned composite film forming step wherein a second un-burned composite film is formed on the first unburned composite film using a second varnish that contains (A2) a polyamide acid or a polyimide and (B2) fine particles at a volume ratio (A2):(B2) of from 20:80 to 50:50 and has a lower fine particle content ratio than the first varnish; a burning step wherein an un-burned composite film composed of the first un-burned composite film and the second un-burned composite film is burned, thereby obtaining a polyimide-fine particle composite film; and a fine particle removal step wherein the fine particles are removed from the polyimide-fine particle composite film.
Inventors:
Sugawara Tsukasa
Takahiro Asai
Takahiro Asai
Application Number:
JP2014561642A
Publication Date:
July 08, 2015
Filing Date:
March 31, 2014
Export Citation:
Assignee:
Tokyo Ohka Kogyo Co., Ltd.
International Classes:
B32B27/34; B01D69/12; B01D71/64; B32B5/22; C08J9/26; H01M8/02; H01M8/10; H01M50/403; H01M50/414; H01M50/423; H01M50/449
Domestic Patent References:
| JP2013177560A | ||||
| JP201257277A |
Attorney, Agent or Firm:
Masayuki Masabayashi