Composite sheet member having a plurality of coextruded laminar

Details Composite sheet member having a plurality of coextruded laminar Composite sheet member having a plurality of coextruded laminar

1977-10-18

1978-07-18

Lesmes, George F.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

15624411, 260880R, 428493, 428519, 428520, 428522, 264171, B32B 700

Patent

active

041017021

ABSTRACT:
The present invention relates to a composite sheet member having a plurality of coextruded laminar layers comprising a base layer having at least one exterior layer, said base layer being formed from a first polyblend of low grafted rubber content and said exterior layers being formed from a second polyblend having a higher grafted rubber content, said composite sheet having increased impact strength when impacted with a force through the base layer to the exterior layer.

REFERENCES:
patent: 3509238 (1970-04-01), Aubrey et al.
patent: 3682768 (1972-08-01), Adams et al.
patent: 3993810 (1976-11-01), Bonis

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