High gloss high impact TPO coextrusion and method of making

Details High gloss high impact TPO coextrusion and method of making High gloss high impact TPO coextrusion and method of making

1997-02-12

1999-10-26

Wu, David W.

Stock material or miscellaneous articles

Composite

Of addition polymer from unsaturated monomers

428523, 525240, 525322, B32B 2708

Patent

active

059725206

ABSTRACT:
A high gloss, impact resistant material is made by coextruding a cap layer of a metallocene polyethylene and clarified random copolymer polypropylene onto a core layer. The coextrusion process is guided by a dual manifold die which reduces the interfacial instability of the melt streams as the cap layer is being applied. When thermoformed, the material retains its gloss and exhibits excellent low temperature impact resistance.

REFERENCES:
patent: 5017430 (1991-05-01), Chu et al.
patent: 5091236 (1992-02-01), Keller et al.
patent: 5608008 (1997-03-01), Miyata et al.
patent: 5614315 (1997-03-01), Kondo et al.
patent: 5639816 (1997-06-01), Yamaguchi et al.

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