Patent ID: 6132661
Filing Date: 2000-10-17
Classification: D04H

Abstract:
A method of producing a longitudinally stretched nonwoven fabric of a web which consists of long fiber filaments of 3 .mu.m to 15 .mu.m in diameter and said filaments are formed by extruding a melted polymer with a spinning means having a plurality of fine nozzles and taking up said filaments at a high drafting ratio under the friction of a high speed fluid so as to accumulate said filaments on a conveyer, said method comprising the steps of:(a) maintaining said filaments upon being extruded from the nozzles in a melted state to be drafted;(b) thereafter cooling said filaments with a cooling fluid or an aqueous spray or cooling air;(c) guiding a flow of said cooled filaments onto a conveyer while inclining the filaments in a direction of transferring onto said conveyer;(d) forming a web by aspirating said filaments under a reduced pressure in a linear transverse direction from a side opposite a filament loading surface of said conveyer; and(e) subjecting said web to a short distance stretching in a longitudinal direction of said web at a stretching ratio of at least 5.