Process for producing an embossed thermoplastic resin sheet havi

Details Process for producing an embossed thermoplastic resin sheet havi Process for producing an embossed thermoplastic resin sheet havi

1985-08-30

1987-06-09

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

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

264 402, 264 406, 264237, 264284, 4251311, 4251335, B29C 5904

Patent

active

046719130

ABSTRACT:
A process for continuously producing an embossed thermoplastic resin sheet having a colored layer which comprises associating a molten thermoplastic resin A and a molten thermoplastic resin B having a different color from the resin A within a die for extrusion molding, extruding the associated mass through an extrusion opening to form a two-layered thermoplastic resin sheet, and thereafter embossing the sheet, wherein the temperature T (.degree.C.) of the thermoplastic resin sheet immediately before the embossing and the surface roughness R (micrometers) of said sheet immediately before the embossing expressed by a 10-point average roughness in accordance with ISO-R468 are selected so as to satisfy the following relation 1.2R+T.ltoreq.145 (1).

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