Stretchable composite sheet and process for forming the same with a plurality of gathers

摘要

Here is disclosed a composite sheet 1 comprising substantially non-stretchable nonwoven fabric sheets 2, 3 and a plurality of elastic members 4 extending in a transverse direction and spaced one from another in a longitudinal direction by a given spacing wherein the elastic members 4 are secured in a stretched state to the nonwoven fabric sheets 2, 3. The composite sheet 1 has a plurality of gathers 5 formed by slightly undulated surface of the nonwoven fabric sheets 2, 3 and the elastic members 4 and these gathers 5 are substantially continuous in the longitudinal direction and arranged at substantially regular intervals in the transverse direction.