Chemical-resistant wholly aromatic polyamide fiber material

Claim 1

A chemical-resistant wholly aromatic polyamide fiber material, comprising wholly aromatic polyamide fibers each comprising at least one aromatic polyamide containing repeating units selected from the group consisting of those of the formulae (I) and (II): ##STR6## wherein Ar 1 , Ar 2 , and Ar 3 respectively present, independently from each other, an unsubstituted or substituted divalent aromatic radical which comprises a single aromatic ring, or two or more aromatic rings that are condensed together, or are linked together, by a single bond, or by a bridging atom or radical, and which is oriented either meta or para, and R 1 , R 2 and R 3 each represent independently from each other, a hydrogen atom or an alkyl radical having 1 to 3 carbon atoms, each of which fibers is covered with a coating of a fluorine-containing polymeric resin comprising at least one member selected from the group consisting of tetrafluoroethylene polymers, tetrafluoroethylene-hexafluoropropylene copolymers, tetrafluoroethylene-trifluorochloroethylene copolymers, tetrafluoroethylene-vinylidene fluoride copolymers, tetrafluoroethyleneperfluorovinyl ether copolymers, tetrafluoroethylene-carboxylic acid or sulfonic acid group-containing perfluorovinyl ether copolymers, trifluorochloroethylene polymers, vinyl fluoride polymers, vinylidene fluoride polymers, vinyl fluoride-hexafluoropropylene copolymers, and vinyl chloride-trifluorochloroethylene copolymers, said coating having been derived from an aqueous emulsion of said fluorine-containing polymeric resin.