Absorbent article and method for producing same

A method of manufacturing an absorbent article including a stretchable region stretchable at least in one direction, wherein

• in forming the stretchable region, in a state in which an elastic film is interposed between a first sheet layer composed of a nonwoven fabric and a second sheet layer composed of a nonwoven fabric while the elastic film is stretched in a stretching and contracting direction of the stretchable region,
• the first sheet layer and the second sheet layer are welded at a large number of positions arranged at intervals in each of the stretching and contracting direction and a direction orthogonal thereto, thereby
• the elastic film is melted at the large number of positions to form through holes, and
• the first sheet layer and the second sheet layer are joined at least by solidification of melted material of the elastic film at the positions of the through holes.

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, and the first sheet layer and the second sheet layer are joined via through holes penetrating the elastic film at a large number of sheet bond portions arranged at intervals, wherein
• a region having the elastic film stretchable structure includes a stretchable region stretchable in at least one direction,
• the stretchable region is contracted in a stretching and contracting direction by a contraction force of the elastic film while it is possible that the stretchable region is stretched in the stretching and contracting direction, and
• in at least one of the first sheet layer and the second sheet layer of the stretchable region, a vent hole is formed by piercing to penetrate the sheet layer in a thickness direction at a portion other than the sheet bond portions.