Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having voids in a component
Patent
1991-08-23
1993-01-05
Lesmes, George F.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Composite having voids in a component
521 841, 521 90, 521128, 521143, 4283179, B32B 2700, C08J 900, C08F11000
Patent
active
051769530
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.
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H. J. Leugering (Makromol. Chem. 109, 204 (1967)) p. 204-216.
Bauer Charles W.
Clingman Scott R.
Jacoby Philip
Tapp Willilam T.
Amoco Corporation
Ladd Robert G.
Lesmes George F.
Raimund Chris
Sroka Frank J.
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