| 摘要 |
PURPOSE:Finely porous acrylic fibers with good water-absorption and reduced fluctuation in properties, which are composed of more than 90 wt % of an acrylonitrile polymer and less than 10 wt % of a heat-resistant void stabilizer. CONSTITUTION:Said finely porous acrylic fibers are composed of (A) more than 90 wt %, preferably 90-99.9wt% of an acrylic polymer, preferably a copolymer from at least 90 mole % of acrylonitrile and less then 10 mole % of monomers copolymerizable with acrylonitrile and (B) less than 10 wt %, perferably 10-0.1 wt % of a heat-resistant void stabilizer of a water-insoluble polymer that is miscible but incompatible with the acrylic polymer, soluble in the solvent for the acrylic polymer and softens above about 100 deg.C, such as acrylonitrile-styrene copolymer, cellulose acetate, or methyl metacrylate polymer. |
