Stock material or miscellaneous articles – Hollow or container type article – Cellular material derived from plant or animal source
Patent
1983-04-29
1984-10-16
Thibodeau, Paul J.
Stock material or miscellaneous articles
Hollow or container type article
Cellular material derived from plant or animal source
156203, 428141, 428179, 428332, B32B 102, B32B 330
Patent
active
044775024
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.
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patent: 3347419 (1967-10-01), Brandt
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patent: 4330351 (1979-04-01), LoMaglio et al.
American Can Company
Bowie Stuart S.
Engstrom Harry C.
Thibodeau Paul J.
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