Oriented polymeric microporous films

Details Oriented polymeric microporous films Oriented polymeric microporous films

1995-06-07

1997-01-14

Zemel, Irina

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525240, C08L 5300, C08L 2316

Patent

active

055940706

ABSTRACT:
Polyolefin resin compositions and oriented microporous films prepared from same comprising an ethylene-propylene block copolymer having an ethylene content of about 10 to about 50 wt %, a propylene homopolymer or random propylene copolymer having up to about 10 wt % of a comonomer of ethylene or an .alpha.-olefin of 4 to 8 carbon atoms, and components selected from a low molecular weight polypropylene, a beta-spherulite nucleating agent and an inorganic filler, and to processes for forming such films wherein the microporous films have improved breathability, strength, toughness and break elongation.

REFERENCES:
patent: 4975469 (1990-12-01), Jacoby

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