Polypropylene film with favorable adhesive properties

Details Polypropylene film with favorable adhesive properties Polypropylene film with favorable adhesive properties

1990-09-24

1992-03-17

Cashion, Jr., Merrell C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428511, 428516, B32B 702, B32B 2708

Patent

active

050967703

ABSTRACT:
A non-sealable, multi-layer polypropylene film which includes a base layer of polypropylene and at least one cover layer. The cover layer includes a propylene-ethylene copolymer which includes about 1.2 to 2.8% by weight of ethylene and has a distribution factor V.sub.F greater than about 10, an enthalpy of fusion .DELTA.H.sub.m greater than about 90 J/g and a melt index of about 3 to 12 g/10 min. under a load of 21.6N and about 230.degree. C. The film is particularly useful in laminating and as a support film for aqueous coating systems.

REFERENCES:
patent: 4419411 (1983-12-01), Park
patent: 4508804 (1985-04-01), Asao et al.
patent: 4654252 (1987-03-01), Doyen
patent: 4725466 (1988-02-01), Crass et al.
Molecular Weights.
James C. Randall, "Methylene Sequence Distributions and Number Average Sequence Lengths in Ethylene-Propylene Copolymers", Ethylene-Propylene Copolymers, vol. 11, No. 1, Jan.-Feb., 1978, pp. 33-36.

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