Porous film composites

Details Porous film composites Porous film composites

1991-08-23

1992-12-08

Lesmes, George F.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

428903, 4283166, 4283179, 4283186, 4283199, 428286, B32B 326, B32B 522, B32B 2700, D04H 158

Patent

active

051697122

ABSTRACT:
A porous film composite comprising at least one layer of an oriented polymeric porous film comprising an ethylene-propylene block copolymer having an ethylene content of about 10 to about 50 wt %, a polypropylene homopolymer or random copolymer of propylene having up to about 10 wt % of a comonomer of ethylene or an .alpha.-olefin of 4 to 8 carbon atoms, and at least one component selected from a low molecular weight polypropylene, a beta-spherulite nucleating agent and calcium carbonate adhered to at least one layer of a polymeric foam product, a woven fabric, or a nonwoven fabric such as a carded web of staple fibers, a spunbond fabric, meltblown fabric and a self-bonded, fibrous, nonwoven web.

REFERENCES:
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patent: 4343853 (1982-08-01), Morrison
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patent: 4766029 (1982-08-01), Brock et al.
patent: 4790736 (1988-12-01), Keuchel
patent: 4898634 (1990-02-01), Keuchel
patent: 4975469 (1990-12-01), Jacoby et al.
H. J. Leugering, "Effect of Crystal Structure and Overstructure on Some Properties of Polypropylene", Makromol. Chem. 109, pp. 204-216, (1967).

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