Method of producing a microporous polyolefin membrane

Details Method of producing a microporous polyolefin membrane Method of producing a microporous polyolefin membrane

2004-10-27

2011-12-13

Huson, Monica A (Department: 1742)

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

C264S045800, C264S045900, C264S211120

Reexamination Certificate

active

08075818

ABSTRACT:
A method for producing a microporous polyolefin membrane formed by fine fibrils, the membrane comprising (A) a polyolefin having a weight-average molecular weight of 5×105or more or (B) a composition containing Component (A), connected to each other, and having micropores of 0.05 to 5 μm in average pore size and crystal lamellas of Component (A) or (B) being in a specific alignment state. The method includes extruding a solution of Component (A) or (B) in a solvent into a gel-like formed article; thermally setting the article, with or without stretching, at least at the crystal dispersion temperature of Component (A) or (B), but at melting point of Component (A) or (B) plus 30° C. or lower; and removing the solvent.

REFERENCES:
patent: 3718532 (1973-02-01), Hayes, Jr.
patent: 4588633 (1986-05-01), Kono et al.
patent: 4734196 (1988-03-01), Kono et al.
patent: 4743375 (1988-05-01), Seita et al.
patent: 4873034 (1989-10-01), Kono et al.
patent: 4927576 (1990-05-01), Seita et al.
patent: 5051183 (1991-09-01), Takita et al.
patent: 5057218 (1991-10-01), Koshoji et al.
patent: 5677360 (1997-10-01), Yamamori et al.
patent: 5830554 (1998-11-01), Kaimai et al.
patent: 5853633 (1998-12-01), Kono et al.
patent: 5922492 (1999-07-01), Takita et al.
patent: 0348887 (1990-01-01), None
patent: 0355214 (1990-02-01), None
patent: 0476198 (1992-03-01), None
patent: 03-034334 (1981-03-01), None
patent: 60-242035 (1985-12-01), None
patent: 61-195132 (1986-08-01), None
patent: 61-195133 (1986-08-01), None
patent: 63-039602 (1988-02-01), None
patent: 63-273651 (1988-11-01), None
patent: 03-105851 (1991-05-01), None
patent: 09-087413 (1997-03-01), None

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