Daio Paper Corporation

The University of Tokyo

Keita Mizobuchi

Ryoichi Ochi

Hiromi Sanada

Nobuyuki Okada

Terumasa Kamioka

In a dot pattern, both sufficient strength during the use of a diaper and the ease of tearing can be achieved, while inhibiting sticking of fiber waste of a non-woven fabric in the sealing device. The problems can be solved by the underpants-type disposable diaper characterized by a side seal sectionis formed in a dot pattern in which a plurality of rows of dot-shaped welded parts, disposed with intervals in a vertical direction, are disposed in a transverse direction, and non-welded parts, disposed all over in the transverse direction, are disposed on both sides of each welded part, in the vertical direction; the side seal sectionhas at least partly in the vertical direction a non-densely welded region LD and a densely welded region HD; and each welded partin the densely welded region HD is larger in area than each welded partin the non-densely welded region LD.

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Ehime, Japan

Keita Mizobuchi