RAPID COMMUNICATIONS (in English)
The effect was studied of auxiliary agents, viz., a porophor, a nucleating agent and a slip agent, on the basic factors characterising the effectiveness of extrusion of medium density polyethylene (c f Polimery 1996, 41). Among other things, starting with the point in the plasticating system where the rising temperature makes the porophor decompose, the mechanism of the extrusion process changes: to the known physical phenomena a new one is added, viz., expansion of the microcells dissolved in the surrounding polymer. Results show detailed studies on a larger scale to be worthwhile.
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