Stock material or miscellaneous articles – Structurally defined web or sheet – Nonplanar uniform thickness material
Patent
1983-11-18
1987-11-17
Thurlow, Jeffery
Stock material or miscellaneous articles
Structurally defined web or sheet
Nonplanar uniform thickness material
15624413, 264173, 2642098, 26421112, 26421123, 264514, 264568, 428412, B29C 4706, B32B 312, B32B 2736, B32B 3130
Patent
active
047073934
ABSTRACT:
A plastic multilayer multiple-wall panel, manufactured by the coextrusion of a plurality of adhesively bonded layers of thermoplastically extrudable synthetic resins by means of a multicomponent extrusion die, and comprising a supporting core layer of polycarbonate resin with a plurality of continuous hollow chambers, a UV absorption layer, boned on one or both sides of said core layer and made of a synthetic resin containing at least 2 weight percent of a UV absorber that is volatile at elevated temperatures, and a cover layer, on that side of the UV absorption layer which faces away from the core layer, of a synthetic resin which contains less than 2 weight percent of volatile UV absorber.
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Rohm GmbH
Tentoni Leo B.
Thurlow Jeffery
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