Patent ID: 6352660
Filing Date: 2002-03-05
Classification: C25B,D01D,D01F,D04H,Y10S,Y10T

Abstract:
A process for preparing composite fibers which process comprises(a) mixing a PTFE (polytetrafluoroethylene) or a PTFE copolymer dispersion in a dispersion medium or powder with a finely divided inorganic material and a fiber forming material to form a mixture, (b) shear heating the resulting mixture to a temperature at which sheared PTFE or PTFE copolymer becomes flowable without showing signs of decomposition while, if a dispersion medium is present, removing that dispersion medium, (c) cooling the mixture to below 70Â° C., and (d) mix shearing the mixture at below 70Â° C. to form composite fibers.