Patent ID: 7578317
Filing Date: 2009-08-25
Classification: D03D,D04H,D10B,Y10T

Abstract:
1. Apparatus for production of spun-bond webs comprising: a fabric for collecting stretched filaments intended to form a spun-bond web, wherein said fabric is woven such that air flow through said fabric is prevented in a direction substantially perpendicular to the surface plane of said fabric with warp yarns and weft yarns having a diameter in the range of 0.20 mm to 0.80 mm, wherein said fabric has a 4-shed double layer with support shute weave design in order to be woven in a 4B pattern with a stuffer yarn in the center, wherein each of the warp yarns weave over a single weft yarn on the surface of the fabric within the 4B pattern, and wherein said fabric has a permeability in the range of 400 cfm to 800 cfm.