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U.S. Patent No. 11,771,602
December 1, 2023
By: Tara Olivo
Associate Editor at Nonwovens Industry
Syunsuke Sakai, Tochigi, Japan. Assigned to Daio Paper Corporation, Ehime, Japan. Filed: 6/22/20 Issued: 10/3/23 An absorbent article having an absorber that absorbs excrement, the absorbent article comprising: an elastic film stretchable structure in which an elastic film is stacked between a first sheet layer and a second sheet layer, wherein a region having the elastic film stretchable structure includes a non-stretchable region and a stretchable region provided at least at one side of the stretchable region in a stretching and contracting direction and being stretchable in the stretching and contracting direction, in the stretchable region, in a state in which the elastic film is stretched in the stretching and contracting direction along surfaces of the first sheet layer and the second sheet layer, an elongation at an elastic limit in the stretching and contracting direction is set to 200% or more by directly or indirectly joining the first sheet layer and the second sheet layer at a large number of sheet bond portions arranged at intervals in each of the stretching and contracting direction and a direction orthogonal thereto, and in the non-stretchable region, in a state in which the elastic film is stretched in the stretching and contracting direction along the surfaces of the first sheet layer and the second sheet layer, an elongation at an elastic limit is set to 130% or less by directly or indirectly joining the first sheet layer and the second sheet layer at a large number of sheet bond portions arranged at intervals in each of the stretching and contracting direction and the direction orthogonal thereto and at least one of by an area rate of the sheet bond portions in the non-stretchable region being higher than that in the stretchable region; the elastic film being melted; and the elastic film being finely divided at least in the stretching and contracting direction, wherein the first sheet layer and the second sheet layer are joined by way of through holes formed in an elastic sheet layer at the sheet bond portions, wherein each individual through hole is wider than each sheet bond portion in a width direction, leaving gaps between an edge of the individual through hole and an edge of the individual sheet bond portion within the through hole.
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