ENTANGLEMENT PROCESSING METHOD OF LAMINATED FIBER WEB, NONWOVEN FABRIC OBTAINED THROUGH THE METHOD, NONWOVEN FABRIC OF ULTRA FINE FIBER, AND ARTIFICIAL LEATHER

摘要

PROBLEM TO BE SOLVED: To improve extensibility in a low strain region in a vertical direction in a plane direction with respect to a travel direction of a production line in a nonwoven fabric of filaments having high tensile strength.SOLUTION: A false entangled fiber web is formed in an entanglement processing zone in which a false needle-punch apparatus and a first true needle-punch apparatus are serially arranged while a laminated fiber web is continuously conveyed to the false needle-punch apparatus. The false entangled fiber web is continuously conveyed to the true needle-punch apparatus at a speed draft ratio (B/A) of 105% or more.