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Measurement of Slippage Induced by a Polymer Processing Additive



Kalman Migler, C L. Gettinger, V P. Thlacker, R Conway


Flow profiles of a linear density polyethylene (LLDPE) were measured in an optical slit die situated at the exit of a twin screw extruder. The velocities of tracer particles were measured as a function of position across the slit die at various flow rates. The results show that the presence of a PPA (Dynamar) in the polymer melt induces slippage on the surfaces of the die. The occurrence of slippage indicates that the process improvements obtained with this high energy additive occur via migration to the polymer-metal surface and subsequent reduction in the effective friction between the polymer and the wall.
Proceedings Title
Proceedings of the ANTEC Conference
Conference Dates
May 1, 1999
Conference Location
Conference Title
ANTEC Conference Proceedings


extrusion, polymer, polymer processing additive, slippage


Migler, K. , Gettinger, C. , Thlacker, V. and Conway, R. (2008), Measurement of Slippage Induced by a Polymer Processing Additive, Proceedings of the ANTEC Conference, Undefined (Accessed July 22, 2024)


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Created October 16, 2008