Heat-sealable packaging film

Details Heat-sealable packaging film Heat-sealable packaging film

1991-11-04

1993-10-12

Sluby, P. C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428327, 428330, 428331, 428461, 4284769, 428516, 428518, 428910, 428349, B32B 516, B32B 2708

Patent

active

052523845

ABSTRACT:
A polyolefin film which comprises a polypropylene base layer and at least one top layer comprising a propylene polymer, wherein the base layer is formed of an isotactic polypropylene and the top layer of a copolymer of an o-olefin having 2 to 8 carbon atoms and a syndiotactic propylene, has high sealed-seam strength and excellent optical properties and is useful as, for example, a packaging material.

REFERENCES:
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patent: 4410582 (1983-10-01), Tsunashima et al.
patent: 4439478 (1984-03-01), Ferguson et al.
patent: 4572854 (1986-02-01), Dallmann et al.
patent: 4740421 (1988-04-01), Suzuki et al.
patent: 4764425 (1988-08-01), Balloni et al.
patent: 4786562 (1988-11-01), Kakugo et al.
patent: 4966933 (1990-10-01), Kawakami et al.
John A. Ewen, "Mechanisms of Stereochemical Control in Propylene Polymerizations with Soluble Group 4B Metallocene/Methylalumoxane Catalysts", J. Am. Chem. Soc., 1984, 6355-6364.
"Ullmanns's Encyclopedia of Industrial Chemistry", 4th Edition, vol. 2, pp. 539-553.

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