Patent ID: 6539596
Filing Date: 2003-04-01
Classification: D04H

Abstract:
A method for making a nonwoven web from staple fibers of polytrimethylene terephthalate which comprises:(a) making polytrimethylene terephthalate fibers having a cut length of from 10 to 200 millimeters and a fiber weight of 0.1 to 20 deniers per filament; (b) carding the staple fibers at a belt speed of up to 1000 meters per minute, a cross lap of web of from 1 to 50 layers and a web weight of 5 to 500 g/m2 in a carding machine selected from the group consisting of roller-top, flat-top, and layering types to produce a nonwoven web; and (c) mechanically bonding the web by hydroentanglement at a belt speed of up to 500 meters per minute with from 1 to 10 multiple passes and water jet hydraulic pressure of 1 bar to 500 bar (100 to 50000 kPa).