Patent ID: 9138935
Filing Date: 2015-09-22
Classification: B29C,D01D,D02G,D02J

Abstract:
1. A process for producing an antistatic yarn, comprising the steps of: (a) providing antistatic composite filaments, each extending in an axial direction and including a conductive matrix portion that is made of a first synthetic polymer material having carbon black dispersed therein, and a non-conductive matrix portion that is made of a second synthetic polymer material, each of the conductive and non-conductive matrix portions extending in the axial direction; (b) advancing the antistatic composite filaments to a first heating zone having a first heating temperature (T) at a first advancing speed which ranges from 230 m/min to 330 m/min, such that Tm−T≦60° C. where Tm is a melting point of the first synthetic polymer material; (c) drawing the antistatic composite filaments from the first heating zone to a false twist zone at a second advancing speed such that a draw ratio which is a ratio of the second advancing speed to the first advancing speed ranges from 1.5 to 1.75, thereby obtaining false twisted filaments; and (d) advancing the false twisted filaments from the false twist zone to a second heating zone for heat-setting so as to obtain a crimped yarn.