Oy Wiik & Hoglund Ab

Jar-Erik Jofs

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.

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Jar-Erik Jofs