Microfibers composed of vinylaromatic syndiotactic polymers, composite fleeces made from these microfibers and melt-blowing process for producing.

摘要

A melt-blowing process for producing a fiber preferably a microfiber of a syndiotactic vinyl aromatic polymer, which comprises supplying a vinyl aromatic polymer having a high degree of syndiotacticity in a molten form from at least one orifice of a nozzle into a gas stream which attenuates the molten polymer into microfibers. Such microfibers are particularly useful in the field of high temperature filtration, coalescing and insulation.