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Patents

Stretchable and Contractible Sheet and Absorbent Article:

U.S. Patent No. 10,980,678

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By: Karen McIntyre

Editor, Nonwovens Industry

Toshifumi Ohtsubo, Kagawa, Japan.
Assigned to Unicharm Corporation, Ehime, Japan.

Filed: 1/24/20
Issued: 4/20/21

An absorbent article having an up-down direction and a left-right direction intersecting each other, comprising: an absorbent main body that absorbs excrement; a front band member disposed along the left-right direction and joined to a front-upper-end portion of the absorbent main body; and a back band member disposed along the left-right direction separately from the front band member and joined to a back-upper-end portion of the absorbent main body, wherein the front band member and the back band member each comprise: a first sheet; a second sheet; a plurality of welded portions that joins the first sheet and the second sheet; a plurality of elastic members that is stretchable and contractible in the left-right direction; a first welded-portion row that comprises the plurality of welded portions arranged side-by-side in the up-down direction; and a second welded-portion row that comprises the plurality of welded portions arranged side-by-side in the up-down direction, and located adjacent to the first welded-portion row on a one side in the left-right direction, the plurality of elastic members is arranged with a space in the up-down direction and between the first sheet and the second sheet, each of the elastic members is sandwiched between two welded portions adjacent in the up-down direction with contracting in the left-right direction, and is attached to the first sheet and the second sheet, the first welded-portion row comprises: a first convex portion that protrudes toward the one side in the left-right direction and a second convex portion located adjacent to the first convex portion in the up-down direction, the second welded-portion row comprises a third convex portion that protrudes toward another side in the left-right direction, when the elastic members are not stretched in the left-right direction, an other-side end of the third convex portion is located closer to the another side than a straight line that connects a one-side end of the first convex portion and a one-side end of the second convex portion, when the elastic members are stretched in the left-right direction, the other-side end of the third convex portion is located closer to the one side than the straight line, an end portion of the front band member in the left-right direction is joined to an end portion of the back band member in the left-right direction by a first side seal portion, another end portion of the front band member in the left-right direction is joined to another end portion of the back band member in the left-right direction by a second side seal portion, the first welded-portion row is located between the first side seal portion and the second side seal portion in the left-right direction, and the second welded-portion row is located between the first side seal portion and the second side seal portion in the left-right direction.

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