Fiber materials from homogeneous blends of aromatic polyamides and poly-N-vinylpyrrolidone, production thereof, and use thereof

A fiber material formed from a synthetic polymer, wherein the synthetic polymer is a homogeneous blend consisting essentially of

• .alpha.) poly-N-vinylpyrrolidone and
• .beta.) at least one polyaramide having at least one recurring structural unit of the formula (I) ##STR26## where E.sup.1 and E.sup.2 are identical or different and are each selected from the group consisting of ##STR27## --Ar.sup.1 -- and
• --Ar.sup.1 --X--Ar.sup.2 --,
• where Ar.sup.1 and Ar.sup.2 are identical or different, Ar.sup.1 being phenylene or naphthylene, Ar.sup.2 being phenylene, and Ar.sup.1 and Ar.sup.2 being optionally substituted by (C.sub.1 -C.sub.6)-alkyl, (C.sub.1 -C.sub.6)-alkoxy, Z--CF.sub.3 or halogen, the valence bonds of Ar.sup.1 and Ar.sup.2 being selected so that at least 95% of recurring structural units of the formulae --OC--E.sup.1 --CO-- and --HN--E.sup.2 --NH-- are in the para or coaxial or parallel position and up to 5% of said recurring structural units are:
• J) --OC--E.sup.1 --CO-- units derived from an aromatic dicarboxylic acid containing at least one m-bond, so that said unit is not para-disposed or parallel or coaxial, or
• K) --HN--E.sup.2 --NH-- units derived from an aromatic diamine containing at least one m-bond, so that said unit is not para-disposed or parallel or coaxial, or combinations of J and K;
• and
• X is
• a) a direct bond or one of the following divalent radicals:
• --O--, --SO.sub.2 --, --CO--, --CO--NH--, --C(R.sup.1).sub.2 --, where R.sup.1 is hydrogen, (C.sub.1 -C.sub.6)-alkyl or fluoroalkyl of 1-4 carbon atoms in the alkyl group, or
• b) --Z--Ar.sup.1 --Z--, where Z is --O-- or --C(CH.sub.3).sub.2 --, or
• c) --O--Ar.sup.1 --Y--Ar.sup.2 --O--, where Y is a direct bond or one of the following divalent radicals:
• --O--, SO.sub.2 --, --CO--, --CO--NH--, --C(R.sup.1).sub.2 --, wherein said homogeneous blend fiber material has been obtained by spinning filaments, into a coagulation bath, from a polar aprotic solvent solution containing said synthetic polymer, to form a multifilament bundle, said coagulation bath comprising an aqueous solution containing a polar aprotic solvent.