Stock material or miscellaneous articles – Structurally defined web or sheet – Including aperture
Patent
1983-07-25
1985-05-21
Thibodeau, Paul J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including aperture
428156, 428179, 428180, 428332, B32B 100, B32B 330
Patent
active
045186430
ABSTRACT:
A thermoplastic film having a permanently embossed design or geometric shape built therein for controlling the coefficient of friction of sheets of the film when placed adjacent each other. The film has a relatively smooth or female surface on one side and a relatively rough or male surface on the other side. By varying the relationship of one sheet of film placed adjacent another sheet of film or a surface area of the same film, a desired level of coefficient of friction can be obtained. A relatively low coefficient of friction is obtained when two sheets of the film are placed adjacent each other in a female side to female side relationship. A relatively high coefficient of friction is obtained when two sheets are placed adjacent each other in a male side to male side relationship. The film may be perforated or non-perforated and single layer or multi-layer.
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Ethyl Corporation
Johnson Donald L.
Leonard Paul H.
Sieberth John F.
Thibodeau Paul J.
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