Method of producing resin sheet with roughened surface

Details Method of producing resin sheet with roughened surface Method of producing resin sheet with roughened surface

1991-05-09

1992-12-08

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

2642102, 2642105, 264237, 264327, 264348, 264280, 425327, 425385, 425404, 425445, B29C 4700, B29C 5904, B29C 7102

Patent

active

051695839

ABSTRACT:
A crystalline resin sheet having one, smooth surface and the other, roughened surface is produced by extruding a melt of the resin through a die to form a molten sheet, the molten sheet being subsequently contacted, at only one of the both surfaces thereof, with a cooled, smooth surface maintained at a temperature lower by 20.degree.-90.degree. C. than the melting point of the resin to solidify the molten sheet and to make the contacted surface of the sheet smooth. The other surface of the sheet which has not been contacted with a cooled surface becomes roughened because of the crystallization of the resin.

REFERENCES:
patent: 2631954 (1953-03-01), Bright
patent: 3328503 (1967-06-01), Ancker
patent: 3732349 (1973-05-01), Chen et al.
patent: 4722820 (1988-02-01), Flecknoe-Brown
patent: 4859392 (1989-08-01), Vetter
patent: 4874571 (1989-10-01), Muller

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