PURPOSE: To obtain a laminated nonwoven structure having a high tensile strength and peel strength and excellent dimensional stability, flexibility, water absorption properties and wear resistance by laminating polypropylene-based filament nonwoven fabric to natural fiber nonwoven fabric and fusing.
CONSTITUTION: Polypropylene-based filament nonwoven having ≥1 dL and ≤8-dl single yarn fineness is laminated to nonwoven fabric obtained by sending natural fibers such as cotton to a card to provide a web, interlacing and integrating the web by water jet treatment. The laminate is treated by an ultrasonic fusing device equipped with a pattern roll in such a way that the cotton fibers positioned at least in a boundary zone of both the nonwoven fabric layers in a region in which the polypropylene filament and the cotton fibers are fused in a dotted state are embedded and integrated in the molten part of the filament satisfying both equations of 2≤A≤40 and 7≤B≤80 in which A is the ratio (%) of the area of the total fused region to the whole surface area of a nonwoven structure and B is the density (dots/cm2) of the fused region in a dotted state to form the laminated nonwoven structure.
NISHIMURA SHIGETAKA
YAMAGUCHI SO
