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U.S. Patent No. 9,237,974 B2
March 17, 2016
By: Tara Olivo
Associate Editor at Nonwovens Industry
Naoto Ohashi, Kanonji, Japan; and Toshiya Yago, Kanonji, Japan. Assigned to Uni-Charm Corporation, Ehime, Japan. Filed: 9/26/11 Issued: 1/19/16 A disposable diaper comprising a liquid-permeable top sheet, a liquid-impermeable back sheet and an absorber between the top sheet and back sheet, and having a front body waist region, a crotch region and a back body waist region, wherein the top sheet is a nonwoven fabric having on the skin contact surface a plurality of ridges and a plurality of recesses extending in the lengthwise direction of the disposable diaper, and alternating in the widthwise direction perpendicular to the lengthwise direction, the top sheet has point-like compressed sections, formed by compressing the ridges and/or recesses on the front body waist region and/or the back body waist region, at a density in the range of 4.0-7.0/cm2, and zones of ridges are present in the front body waist region and/or the back body waist region, sandwiched by two point-like compressed sections, the ridges in those zones have different heights than the adjacent ridges at the same location in the lengthwise direction.
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