Stock material or miscellaneous articles – Circular sheet or circular blank – Recording medium or carrier
Patent
1992-11-20
1993-11-02
Thomas, Alexander S.
Stock material or miscellaneous articles
Circular sheet or circular blank
Recording medium or carrier
428412, B32B 2706, B32B 2728
Patent
active
052582159
ABSTRACT:
The invention relates to a method for the coextrusion of a plate-shaped product. In the method according to the invention at least one coating layer is provided by means of coextrusion which is composed of a special polymer mixture. This mixture enables obtaining a matt surface and can be provided very uniformly on the major layer of polycarbonate by coextrusion. The polymer mixture comprises 84-92% by weight of polycarbonate, 4-8% by weight of talcum and 4-8% by weight of a mattifying agent based on acrylate copolymers.
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Plompen Petrus J.
van Es Peter W.
General Electric Company
Thomas Alexander S.
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