PROCESS FOR MANUFACTURE OF TRIBOELECTRICALLY CHARGED NONWOVENS

摘要

The invention involves a process for the manufacture of a triboelectrically charged nonwoven, characterized by a fiber blend made of polyacrylnitrile fibers wit h a titer of .ltoreq. 1.7 dtex and of polyolefine fibers with a titer of .ltoreq. 1.7 dte x freed from lubricating agents and antistatic agents by washing, which is dried down to a moisture content of < 1 % by weight and carded on a longitudinal or randomizing card int o a triboelectrically charged web with a mass per area unit of 15 - 80 g/m2. Thi s web is taken off by means of two simultaneously running rolls and a transfer roll, so that the web is laid on to a conveyor in machine direction, and bonded directly insid e a bonding set, the unbonded web being forwarded via 1 to 3 points of transfer only.