Oriented polymeric microporous films

Details Oriented polymeric microporous films Oriented polymeric microporous films

C - Chemistry, Metallurgy

08

L

C08L 53/00 (2006.01) B29C 55/04 (2006.01) C08J 5/18 (2006.01) C08J 9/26 (2006.01) C08L 23/10 (2006.01) C08L 51/06 (2006.01)

Patent

CA 2056875

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 a-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.

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