Title:
METHOD FOR PRODUCING POROUS FILM, POROUS FILM PRODUCED THEREBY, AND SEPARATOR OR ELECTROCHEMICAL CELL COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2017/043728
Kind Code:
A1
Abstract:
The present invention relates to a method for producing a porous film, a porous film produced by the method, and a separator or an electrochemical cell comprising the porous film, the method for producing a porous film comprising: extrusion-molding a composition comprising a crystalline resin, capable of forming a lamellar, and pore-forming particles so as to form a precursor film; annealing the precursor film at a temperature between (Tm-80)℃ and (Tm-3)℃; and first-stretching the annealed precursor film to between 50% and 400% at 0-50℃, wherein the pore-forming particles are included to be 5 parts by volume to 40 parts by volume with respect to 100 parts by volume of the entire composition, and wherein Tm is the melting temperature of the crystalline resin.
Inventors:
AHN SUNG HEE (KR)
KOO YOUNG LIM (KR)
RA HA NA (KR)
BAE SU HAK (KR)
LEE MIN JEONG (KR)
KOO YOUNG LIM (KR)
RA HA NA (KR)
BAE SU HAK (KR)
LEE MIN JEONG (KR)
Application Number:
PCT/KR2016/004519
Publication Date:
March 16, 2017
Filing Date:
April 29, 2016
Export Citation:
Assignee:
SAMSUNG SDI CO LTD (KR)
International Classes:
B29C48/08; H01M10/052; H01M50/406; B29C48/40
Foreign References:
| JP2009211946A | 2009-09-17 | |||
| JP2009211947A | 2009-09-17 | |||
| JP5750511B2 | 2015-07-22 | |||
| JP4936960B2 | 2012-05-23 | |||
| KR20150070979A | 2015-06-25 |
Attorney, Agent or Firm:
PANKOREA PATENT AND LAW FIRM (KR)
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