Microporous polyolefin film

Details Microporous polyolefin film Microporous polyolefin film

2004-04-02

2009-11-17

Ryan, Patrick (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Separator, retainer or spacer insulating structure

C429S145000, C429S231950

Reexamination Certificate

active

07618743

ABSTRACT:
A microporous polyolefin film that comprises polyethylene and polypropylene as essential components and is composed of a laminate film of two or more layers, wherein the percentage of polypropylene blended in at least one surface layer of the film is more than 50% by weight and 95% by weight or less and the content of polyethylene in the entire film is 50% or more and 95% or less.

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