Opaque oriented polypropylene film

Details Opaque oriented polypropylene film Opaque oriented polypropylene film

1997-12-24

2000-04-11

Copenheaver, Blaine

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

4283159, 4283179, 4283188, 428327, 428910, 521 51, 521 81, 521140, B32B 326, C08J 934

Patent

active

060486082

ABSTRACT:
The present invention relates to an opaque, biaxially oriented polymeric film having a thermoplastic polymer matrix material within which is located a stratum of voids. The voids are formed during orientation by a cavitating agent which is a particle of a cyclic olefinic copolymer. The solid particle is phase-distinct and incompatible with the matrix material.

REFERENCES:
patent: 4377616 (1983-03-01), Ashcraft et al.
patent: 4720416 (1988-01-01), Duncan
patent: 4758462 (1988-07-01), Park et al.
patent: 4965123 (1990-10-01), Swan et al.
patent: 5134173 (1992-07-01), Joesten et al.
patent: 5176954 (1993-01-01), Keller et al.
patent: 5188777 (1993-02-01), Joesten et al.
patent: 5223346 (1993-06-01), Lu
patent: 5629398 (1997-05-01), Okamoto et al.
WO 92/06123 Abstract, Apr. 4, 1992.

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