Methods for the production of films
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United States of America Patent
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Jul 16, 2002
Grant Date -
N/A
app pub date -
Jan 6, 1999
filing date -
Dec 22, 1998
priority date (Note) -
Expired
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Abstract
A film comprising at least one layer of fluorine polymers and poly(meth)acrylates is prepared by (i) preparing a mixture of fluorine polymer and poly(meth)acrylate; and (ii) extruding the mixture maintained below its gel-forming temperature through the die of an extruder having a filter placed before entry of the mixture into the die, the temperature of the die being maintained higher than the temperature of the composition upon entry into the die but lower than the gel-forming temperature of the mixture, onto a roll having a temperature .ltoreq.100.degree. C., thereby forming the at least one layer in the shape of a film.
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