Flexible double-layer polypropylene laminates

Details Flexible double-layer polypropylene laminates Flexible double-layer polypropylene laminates

1979-08-08

1981-03-31

Lesmes, George F.

Stock material or miscellaneous articles

Composite

Of addition polymer from unsaturated monomers

156331, 1563244, 427411, 428500, 428910, 4284248, B32B 2708

Patent

active

042594120

ABSTRACT:
Flexible double-layer polypropylene laminate consisting essentially of a biaxially oriented film of isotactic polypropylene with an atactic polypropylene content of less than 6% by weight and an intrinsic viscosity of from 1.5 to 3 dl/g, adhesively bonded to a non-oriented film of isotactic polypropylene with an atactic polypropylene content of from 15 to 30% by weight, said polypropylene in said non-oriented film deriving directly from the polymerization of propylene and having an intrinsic viscosity of from 2 to 8 dl/g.

REFERENCES:
patent: 3607616 (1971-09-01), Barbehenn
patent: 3666585 (1972-05-01), Barbehenn
patent: 3862869 (1975-01-01), Peterson
patent: 3887755 (1975-06-01), Zammer
patent: 3965271 (1976-06-01), Harrington
patent: 3995087 (1976-11-01), DeSanzo
patent: 4046945 (1977-09-01), Baxmann et al.
patent: 4085244 (1978-04-01), Stillman
patent: 4163080 (1979-07-01), Buzio et al.

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