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Slip additives are added to reduce the surface coefficient of friction of polymers and are used to enhance either processing or end applications. This in turn enables faster winding and unwinding of films and prevents cracking of sheets during cutting or of thermoformed parts during denesting. Further benefits are excellent sealability and weldability.
Typically slip additives have a low compatibility with the polymer which allow migration to the film surface. A good control of the compatibility controls the migration speed and thus the speed of acting performance can be engineered.