High-strength porous film and process for producing the same

Details High-strength porous film and process for producing the same High-strength porous film and process for producing the same

1996-10-01

1998-06-02

McCamish, Marion E.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

21050027, 21050036, 264 41, 2642104, 2642106, 26421119, 264344, 264564, 428220, 428333, 428339, 429249, 429254, 521 64, 521143, B29C 4778, B29C 5504, B01D 3900, H01M 216

Patent

active

057596786

ABSTRACT:
The present invention relates to a high-strength porous film or sheet consisting essentially of a high-molecular-weight polyethylene resin having a viscosity-average molecular weight of not less than 300,000, wherein the said film has a thickness of 5 to 50 .mu.m, an air permeability of 200 to 1,000 sec/100 cc, a porosity of 10 to 50% and a pin puncture strength of not less than 600 gf/25 .mu.m, and a process for producing the said film.

REFERENCES:
patent: 4237083 (1980-12-01), Young et al.
patent: 4588633 (1986-05-01), Kono et al.
patent: 4613441 (1986-09-01), Kohno et al.
patent: 4731304 (1988-03-01), Lundquist et al.
patent: 4778601 (1988-10-01), Lopatin et al.
patent: 4828772 (1989-05-01), Lopatin et al.
patent: 4833172 (1989-05-01), Schwarz
patent: 4873034 (1989-10-01), Kono et al.
patent: 5240655 (1993-08-01), Troffkin et al.
117 440 May 1993 (Mitsubishi Kasei Corp.) Abstract. 254 806 (Mitsubishi Chem. Ind. KK.) Nov. 1987 Abstract.
Derwent Class A17, XP002045340, AN 93-410978 & JP 05 310 989 Nov. 1993.
Derwent, Class A17, AN 95-057374 XP002045341 & JP 06 336 535 Dec. 1994.

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