Toyoshi Umebayashi, Settu, Japan.
Assigned to Zuiko Corporation, Settu-Shi, Osaka, Japan.

Filed: 4/10/13
Issued: 9/11/18

A method for producing a disposable underwear-type diaper comprising: a first step of arranging sheet-like fasteners folded in two, on one main surface of a belt-like first continuous body having a pair of side edges, at intervals along the pair of side edges of the first continuous body so that a main surface of each of the fasteners is in contact with the one main surface, that two ends of the fasteners are disposed on an outside of the one main surface of the first continuous body when viewed from a direction normal to the one main surface and that a pair of the fasteners faces each other in a direction in which the side edges of the first continuous body face each other; a second step of forming a composite continuous body by bending each end, on the first continuous body side, of the fasteners so as to be laid over another main surface of the first continuous body, then laying a belt-like second continuous body over the another main surface of the first continuous body, and then bonding the first continuous body and the second continuous body together so that the each end of the fasteners is fixed by bonding the each end of the fasteners to at least one of the first continuous body and the second continuous body; a third step of cutting the composite continuous body to thereby form an individual piece divided by an imaginary line in two parts of a first region including the pair of fasteners facing each other and a second region not including the fasteners; and a fourth step of folding the individual piece in two along the imaginary line so that the first region and the second region are laid one over the other, bending other ends of the fasteners so as to be laid over the second region, and then, fixing the other ends to the second region, wherein in the fourth step, after the individual piece is folded in two along the imaginary line so that the fasteners are sandwiched between the first region and the second region, each of the other ends of the fasteners is bent to a side opposite to the each of the ends and laid over the second region, and the other ends are fixed to the second region, the first continuous body includes a liquid transmitting top sheet forming the one main surface of the first continuous body, a liquid non-transmitting back sheet forming the other main surface of the first continuous body, and an absorber disposed between the top sheet and the back sheet, and the second continuous body includes a liquid transmitting or liquid non-transmitting cover sheet.