Patent ID: 8604121

Claim:
A molecular miscible blend solution of aromatic polyamide and a non-crystalline polymer, in which the aromatic polyamide polymer and 5 to 100% of polyvinylpyrrolidone, based on the weight of the aromatic polyamide are dissolved in a polar organic solvent containing an inorganic salt, wherein the aromatic polyamide polymer has at least 25 mol % of repeat units represented by the following Formula (I) to the whole repeat units of the aromatic polyamide polymer and the numbers of repeat units in each aromatic polyamide is 10 to 100,000: wherein R is an aromatic group having at least one nitrile group substituted on the aromatic nucleus; and R′ is a phenyl, naphthyl or diphenyl group, each of which is substituted or not substituted by Cl, Br, I, NO 2 , an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.