Polyolefins have a high COF (coefficient of friction) of the solid material which leads to a tendency to adhere to themselves or a metal surface during processing of the non molten material (a film for instance).

A desirable COF would be 0,2 - 0,3.

These values can be reached with the use of slip additives. CONSTAB has a full range of masterbatches containing migrating (fatty acid amides for instance) or non migrating slip additives which enables manufacturers to formulate films with the desired COF values. 

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