Heat-sealable packaging film

Details Heat-sealable packaging film Heat-sealable packaging film

1991-11-04

1993-10-19

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, 428518, 428349, 428910, B32B 2708, B32B 516

Patent

active

052543943

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

REFERENCES:
patent: 4343852 (1982-08-01), Isaka et al.
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.
J. A. Ewen, "Mechanisms of Stereochemical Control in Propylene Polymerizations with Soluble Group 4B Metallocene/Methylalumoxane Catalysts", J. Am. Chem. Soc. 1984, 106, pp. 6355-6364.

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