| 摘要 |
A disposable diaper includes a backsheet consisting essentially of an elastic inner layer and an inelastic outer layer made of fibrous material. The inelastic outer layer is joined to the elastic inner layer in its stretched state at a plurality of spots for joining intermittently arranged on the elastic inner layer in its stretched state. In each of areas enclosed by a plurality of intersecting lines each defined by a plurality of the spots for joining closely arranged in succession, the inelastic outer layer is free to float off from the elastic inner layer and thereupon to form a plurality of pleats as the elastic inner layer is made free to contact.
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