Filled core materials having unfilled outer attached layers

Details Filled core materials having unfilled outer attached layers Filled core materials having unfilled outer attached layers

1989-04-21

1990-05-22

Ives, P. C.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

428215, 428324, 428325, 428328, 428206, 428207, 428297, 428413, 428412, 428480, 428483, 428 31, 264171, B32B 2708, B32B 2736, B27N 500

Patent

active

049276751

ABSTRACT:
Improved composite materials are disclosed, in which a thermoplastic core layer has at least one inorganic or organic constituent dispersed therein. A first coextruded thermoplastic outer layer is attached to a first surface of the core layer, and is substantially free of dispersed inorganic and organic constituents, while a second coextruded thermoplastic outer layer is attached to a second surface of the core layer and is also substantially free of dispersed inorganic and organic constituents.

REFERENCES:
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patent: 3448183 (1969-06-01), Chisholm
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patent: 3645822 (1972-02-01), Widiger et al.
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patent: 4111349 (1978-09-01), Buckler
patent: 4255219 (1981-03-01), Dellavecchia
patent: 4402889 (1983-06-01), Bonis
patent: 4474845 (1984-10-01), Hagerman et al.
patent: 4477521 (1984-10-01), Lehmann et al.
patent: 4540623 (1985-09-01), Im et al.

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