MICROFIBERS OF SYNDIOTACTIC VINYL AROMATIC POLYMERS, NONWOVEN MATS OF THE MICROFIBERS AND MELT-BLOWING PROCESS FOR THE PRODUCTION THEREOF

摘要

Fiber, preferably microfibers, of a syndiotactic vinyl aromatic polymer, are produced by a melt-blowing process in which a vinyl aromatic polymer having a high degree of syndiotacticity is supplied in a molten form from at least one orifice of a nozzle into a gas stream which attenuates the molten polymer into fibers. Such fibers are particularly useful for preparation of nonwoven mats having utility in the field of high temperature filtration, coalescing and insulation. 38,513-F