Patent ID: 8722173
Filing Date: 2014-05-13
Classification: A61F,B32B,D04H,Y10T

Abstract:
1. A liquid-pervious fibrous non-woven fabric having a longitudinal direction, a transverse direction and a thickness direction being orthogonal to one another, said liquid-pervious fibrous non-woven fabric comprising: upper and lower surfaces opposed to each other in the thickness direction and both extending in the longitudinal direction and the transverse direction, the upper surface being formed with ridges and grooves extending in parallel in the longitudinal direction to be alternately arranged in the transverse direction, and the lower surface being substantially flat; and staple fibers, made of thermoplastic synthetic resin, being fused together in the liquid-pervious fibrous non-woven fabric, wherein: a thickness t measured from the lower surface to a bottom of one of the grooves is in a range of 40 to 60% of a thickness T measured from the lower surface to an apex of one of the ridges, the staple fibers include fibers each having a fiber length sufficiently long to extend across at least one ridge of the ridges to the grooves on both sides of the at least one ridge, and a specific volume of one of the ridges is greater than a specific volume of one of the grooves.