Method of and apparatus for making a non-slip plastics film

Details Method of and apparatus for making a non-slip plastics film Method of and apparatus for making a non-slip plastics film

1976-04-20

1977-08-30

Whitby, Edward G.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156 79, 156244, 260 25R, 264 459, 264 51, 264 95, 264173, 264DIG14, 428315, 428409, 428910, B32B 518

Patent

active

040452700

ABSTRACT:
A method of making a non-slip plastic film comprises extruding separate plasticized plastic materials in two streams so that one stream abuts against and adheres to the other to form a combined plastic layer. The combined plastic layer is then stretched by directing air centrally into a tubular formation of this layer. One of the plastic materials comprises a material having an expanding agent or a foaming agent and the stretching causes the breaking of the voids of the foam plastic to form a rough, irregular net-like formation on the exterior of the other plastic. The apparatus includes two separate nozzles arranged to extrude plastic material so as to intersect and form a combined plastic.

REFERENCES:
patent: 3023461 (1962-03-01), Sherman
patent: 3682730 (1972-08-01), Haase
patent: 3956438 (1976-05-01), Schippers
patent: 3957566 (1976-05-01), Rahlfs
patent: 3966861 (1976-06-01), Papesh et al.

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