Patent ID: 8231974
Filing Date: 2012-07-31
Classification: B32B,C08F,C08L,Y10T

Abstract:
1. A fluoropolymer molding method for producing a molded article, wherein the fluoropolymer comprises fluoropolymer particles each having a multi-layer structure consisting of at least two types of fluoropolymers having different melting points, with at least one inner layer made of polytetrafluoroethylene having a melt flow rate of 0 g/10 min. as measured by the procedure of ASTM D-1238-95 at a temperature of 372±1° C. and a load of 5 kg, and wherein said fluoropolymer of the outermost layer is selected from the group consisting of tetrafluoroethylene/hexafluoropropylene copolymer, ethylene/tetrafluoroethylene copolymer, ethylene/chlorotrifluoroethylene copolymer, polychlorotrifluoroethylene, and polyvinyl fluoride, and wherein said fluoropolymer particles comprise from 10 to 95 weight percent of said polytetrafluoroethylene having a melt flow rate of 0 g/10 min., said method comprising molding said fluoropolymer at a temperature higher than the melting point of said fluoropolymer of the outermost layer and lower than the melting point of said polytetrafluoroethylene having a melt flow rate of 0 g/10 min., and thereby forming said molded article.