Polymetaphenylene isophthalamide-based polymer porous film,...

Details Polymetaphenylene isophthalamide-based polymer porous film,... Polymetaphenylene isophthalamide-based polymer porous film,...

2004-02-12

2008-08-05

Vo, Hai (Department: 1794)

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

C428S315500, C428S315700, C428S319300, C428S319700, C428S319900, C210S500380, C427S434200

Reexamination Certificate

active

07407702

ABSTRACT:
A polymetaphenylene isophthalamide-based polymer porous film having a satisfactory porous structure that exhibits excellent gas permeability and heat resistance. It is produced by a process which comprises casting a dope of the polymetaphenylene isophthalamide-based polymer and coagulating it in a coagulating bath. The porous film may also contain inorganic whiskers, and a composite porous film may be formed in combination with a separate thermoplastic polymer film.

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“Property Information” article, 2 pages.

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