| 摘要 |
[Problem] With respect to a dot pattern, to achieve both easy peeling off and sufficient strength when mounted while suppressing the adhesion of fibrous chaff of a non-woven fabric in a sealing device. [Solution] The problem is solved by means of an underpants-type disposable diaper characterized by: a side sealing section (13) at which a dot pattern is formed such that a plurality of rows of dot-shaped welded sections (13s, 13b) arrayed with spaces therebetween in the vertical direction are arrayed in the horizontal direction, and having non-welded sections (13n) extending across the entirety in the widthwise direction at both sides in the vertical direction of each welded section (13s, 13b); the side sealing section (13) having a region that is at least a portion in the vertical direction that is a sparse welded region (LD) and a region that is at least a portion in the vertical direction that is a dense welded region (HD); and the area of each welded section (13b) of the dense welded region (HD) being greater than the area of each welded section (13s) of the sparse welded region (LD). |
