Plastic sheet having high gloss and low coefficient of friction

Details Plastic sheet having high gloss and low coefficient of friction Plastic sheet having high gloss and low coefficient of friction

1983-09-30

1984-10-23

Thibodeau, Paul J.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156202, 15624411, 15624424, 264284, 264293, 428 36, 428156, 428172, B29D 2310, B32B 3112, B32B 108

Patent

active

044786638

ABSTRACT:
A plastic sheet (13) having a surface with low friction and high gloss is produced by extruding a layer of thermoplastic and pressing it while hot against the surface of a chill roller (17). The surface of the chill roller (17) is characterized by being highly polished and having minute randomly distributed depressions therein of an average depth of about 5 microns, a depth standard deviation of less than 3 microns, and an average frequency of about 3,000 per square centimeter. The thermoplastic layer may be laminated to a single or multilayer base (12) to form a finished product (21). A polyethylene surface layer will have a coefficient of friction generally less than 1.0 with respect to itself, while the surface nonetheless retains a high gloss appearance.

REFERENCES:
patent: 3260410 (1962-11-01), Brandt
patent: 3300286 (1967-01-01), Nalband et al.
patent: 3347419 (1967-10-01), Brandt
patent: 3381818 (1968-05-01), Cope et al.
patent: 3388017 (1968-06-01), Grimsley et al.
patent: 3540959 (1970-11-01), Connor
patent: 3740306 (1973-06-01), Kosbab et al.
patent: 3958721 (1976-05-01), Kushida et al.
patent: 3976224 (1976-08-01), Ericson et al.
patent: 4329385 (1982-05-01), Banks et al.
patent: 4330351 (1982-05-01), LoMaglio et al.

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