Method of and apparatus for making polymeric film

Details Method of and apparatus for making polymeric film Method of and apparatus for making polymeric film

G - Physics

05

D

18/719, 18/739

G05D 23/19 (2006.01)

Patent

CA 1046213

ABSTRACT A process and apparatus are provided for making polymeric film wherein flowable polymeric material is ex- truded in molten form through a die, having a pair of die lips divided into thermally isolated sections, and which in- clude selectively controlling, by heating or cooling, the temperature of the isolated sections in response to film thickness measurements, whereby to improve thickness uni- formity of the film so formed.

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