Patent ID: 7985361
Filing Date: 2011-07-26
Classification: C08L,D01F,Y10T

Abstract:
1. A spinning composition useful for the dispersion spinning of non-melt-processible fluoropolymer fiber comprising: a mixture of an aqueous solution of a matrix polymer and an aqueous dispersion of non-melt-processible polytetrafluoroethylene or modified polytetrafluoroethylene particles having an SSG of less than about 2.40, said aqueous dispersion containing an aliphatic alcohol ethoxylate nonionic surfactant and containing less than about 0.5 weight % surfactants containing aromatic groups, said aliphatic alcohol ethoxylate having a 20% residuals temperature determined by thermogravimetric analysis (TGA) of less than about 290° C., and said dispersion having a fluorinated surfactant content of less than about 300 ppm.