Patent ID: 7437807
Filing Date: 2008-10-21
Classification: D04H,D05C,D06N,Y10T

Abstract:
1. A method of manufacturing a spunbonded nonwoven from thermoplastic polymer fibers or filaments, comprising the steps of (i) performing at least one of (a) bonding fibers or filaments having a titer of 6 to 15 dtex by needling, and (b) bonding fibers or filaments having a titer of 1 to 5 dtex by using a combination of water jets and needling, and (ii) stretching the bonded fibers or filaments by up to 30% in the longitudinal direction between needling stages by passing the bonded fibers between a pair of rollers running at different speeds in a S-wrap configuration, the spunbonded nonwoven exhibiting no more than 5% shrinkage during carpet manufacture using the spunbonded nonwoven.