Patent ID: 8137812
Filing Date: 2012-03-20
Classification: B32B,C08F,C08J,Y10T

Abstract:
1. A method of producing a laminate containing a fluoropolymer comprising the step of removing oligomers by extruding the fluorine-containing ethylenic polymer obtained by polymerization using an extruder having a vent mechanism equipped with a pressure reducing device, said fluoropolymer being an oligomer-containing or oligomer-free fluoropolymer, and being a copolymer comprising tetrafluoroethylene unit and a perfluoro monomer unit derived from a perfluoro monomer represented by the general formula (i): wherein Rf 1 represents —CF 3 or —ORf 2 , and Rf 2 represents a perfluoroalkyl group containing 1 to 5 carbon atoms, and wherein the content of oligomers having a number average molecular weight of not higher than 10,000 is not higher than 0.05% by mass relative to the mass of said fluoropolymer.