Patent ID: 6632313
Filing Date: 2003-10-14
Classification: D01F,D04H,Y10T

Abstract:
A process for the manufacture of a spunbonded fabric comprising the following steps:(a) drawing bicomponent fibers melt spun from two different polypropylene granulates with a first polypropylene granulate having an MFI viscosity range of 16 to 35 and a second polypropylene granulate having an MFI viscosity range which is 8 to 10 points below the MFI viscosity range of the first polypropylene granulate, (b) placing the bicomponent fibers on a sieve belt and thermobonding the bicomponent fibers to obtain a nonwoven fabric, (c) stretching the bicomponent fibers to be curled of the nonwoven fabric lengthwise and/or transversely and heating the bicomponent fibers during the stretching, and thereafter (d) relaxing the bicomponent fibers of the nonwoven fabric to obtain the spunbonded fabric with curled bicomponent fibers.