Process for manufacture of triboelectrically charged nonwovens

Details Process for manufacture of triboelectrically charged nonwovens Process for manufacture of triboelectrically charged nonwovens

B - Operations, Transporting

01

D

B01D 39/08 (2006.01) B01D 17/06 (2006.01) B01D 39/16 (2006.01) D04H 1/42 (2006.01) D04H 1/46 (2006.01) D04H 1/48 (2006.01) D04H 1/54 (2006.01) D04H 1/72 (2006.01) D04H 13/00 (2006.01)

Patent

CA 2363740

The invention involves a process for the manufacture of a triboelectrically charged nonwoven, characterized by a fiber blend made of polyacrylnitrile fibers with a titer of <= 1.7 dtex and of polyolefine fibers with a titer of <= 1.7 dtex 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 into a triboelectrically charged web with a mass per area unit of 15 - 80 g/m2. This 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 inside a bonding set, the unbonded web being forwarded via 1 to 3 points of transfer only.

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