Patent ID: 8524355
Filing Date: 2013-09-03
Classification: A61F,Y10T

Abstract:
1. A disposable absorbent article, comprising: a liquid-permeable top sheet; a liquid-impermeable back sheet; and an absorbent mat provided between said liquid-permeable top sheet and said liquid-impermeable back sheet, the absorbent mat including a water-absorbent layer in a general form of a sheet that contains a water-absorbent resin powder but that does not contain pulp fibers, and a fiber assembly layer that contains both the water absorbent resin powder and the pulp fibers, the water-absorbent layer and the fiber assembly layer being arranged sequentially in this order from a top sheet side, the water-absorbent layer including a first nonwoven fabric sheet and a second nonwoven fabric sheet, the water-absorbent layer further including water-absorbent resin powder presence regions in which the water-absorbent resin powder is present, and water absorbent resin powder absence regions which is formed between the water-absorbent resin powder presence regions, the water-absorbent resin powder presence regions and the water-absorbent resin powder absence regions being formed to be adjacent with one another between said first nonwoven fabric sheet and said second nonwoven fabric sheet, the first nonwoven fabric sheet and the second nonwoven fabric sheet of the water-absorbent layer being bonded to each other in the water-absorbent resin powder absence regions, the fiber assembly layer including a fiber presence region in which both the pulp fibers and the water-absorbent resin powder are present, and a fiber absence region, which is formed between the fiber presence regions, in which both the pulp fibers and the water-absorbent resin powder are absent, the fiber presence region and the fiber absence region being formed to the adjacent with each other, said fiber assembly layer further including an upper nonwoven fabric sheet and a lower nonwoven fabric sheet, the fiber presence region and the fiber absence region being formed between the upper nonwoven fabric sheet and the lower nonwoven fabric sheet, each said fiber presence region being wrapped up with the upper nonwoven sheet and the lower nonwoven sheet, the upper nonwoven fabric sheet and the lower nonwoven fabric sheet being bonded together at the fiber absence region so as to form a cavity between said liquid-impermeable back sheet and said fiber assembly layer, a surface of said liquid-impermeable back sheet comprising a part of a boundary which defines said cavity, wherein the water absorbent layer and of the fiber assembly layer are detached at each location of the water-absorbent resin powder absence region and the fiber absence region.