Patent ID: 6136124
Filing Date: 2000-10-24
Classification: B29C,B29K,B31F,D04H,Y10S,Y10T

Abstract:
In a method of manufacturing a bulky textured non-woven by the steps of:(a) producing a spin-bonded non-woven from many individual filaments that have been stretched and deposited in the form of a skein of fibers,(b) pressing and hot bonding the skein into a semifinished non-woven between a pair of rollers, and(c) processing the skein with another pair of rollers,the improvement comprising initially stretching the separate filaments to a range of 50 to 70% of their maximal possible extension just before their breaking point during step (a) and subsequently processing the semifinished non-woven during step (c) between a pair of rollers including a positive roller with elevations distributed over its surface, and a negative roller with the same number depressions distributed over its surface such that the elevations in the positive roller engage the depressions in the negative roller, stretching the non-woven further in the vicinity of the engagement.