Title:
MICROPOROUS POLYOLEFIN FILM
Document Type and Number:
WIPO Patent Application WO/2002/092677
Kind Code:
A1
Abstract:
A microporous polyolefin film made of a composition which comprises as essential ingredients (A) polyethylene having a viscosity−average molecular weight of 50,000 to 1,500,000 and (B) polypropylene having a viscosity−average molecular weight of 100,000 to 1,500,000 in such proportions that A&plus B is at least 80 wt.% based on the whole composition, A&sol (A&plus B) is from 51 to 90 wt.%, and B&sol (A&plus B) is from 10 to 49 wt.%, and which has a shutdown temperature lower than 140°C and has a continuous phase in which the polyethylene and polypropylene are intertwined with each other.
Inventors:
TSUJIOKA NORIO (JP)
KONDO TAKAHIKO (JP)
SAITO YOKO (JP)
KONDO TAKAHIKO (JP)
SAITO YOKO (JP)
Application Number:
PCT/JP2002/004743
Publication Date:
November 21, 2002
Filing Date:
May 16, 2002
Export Citation:
Assignee:
ASAHI CHEMICAL IND (JP)
TSUJIOKA NORIO (JP)
KONDO TAKAHIKO (JP)
SAITO YOKO (JP)
TSUJIOKA NORIO (JP)
KONDO TAKAHIKO (JP)
SAITO YOKO (JP)
International Classes:
C08J5/18; H01M50/417; H01M50/489; H01M50/491; H01M4/66; H01M6/18; (IPC1-7): C08J9/26; H01M2/16
Foreign References:
| JPH07268118A | 1995-10-17 | |||
| JPH10298324A | 1998-11-10 |
Attorney, Agent or Firm:
Asamura, Kiyoshi (New Ohtemachi Bldg. 2-1, Ohtemachi 2-chom, Chiyoda-ku Tokyo, JP)
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