Method of coextruding a plate-shaped product

Details Method of coextruding a plate-shaped product Method of coextruding a plate-shaped product

1991-05-30

1993-08-10

Thurlow, Jeffrey

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Layered, stratified traversely of length, or multiphase...

264211, 264349, 525 67, B29C 4706

Patent

active

052346480

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 of 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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Pottier-Metz et al., "Low Gloss Talc Filled ABS/PC" U.S. Appln. Ser. No. 685,797 filed Apr. 16, 1991.

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