| 摘要 |
A breathable and liquid-impervious composite sheet 1 includes a flexible, breathable and liquid-impervious thermoplastic synthetic resin film 2 and heat-sealable nonwoven fabric layers 3A, 3B placed upon opposite surface of the film 2. The film 2 has a basis weight of 0.098 - 0.392 N/m<2> and a thermal shrink percentage of 3 - 18 % under 60 DEG C thermal atmosphere while the nonwoven fabric layers 3A, 3B have a basis weight of 0.049 - 0.294 N/m<2>. The sheet 1 is formed with plural arrays of heat-sealed regions 4 each extending in transverse direction Y and spaced one from another in longitudinal direction X intersecting the transverse direction Y. Between each pair of the adjacent heat-sealed regions 4, the nonwoven fabric layers 3A, 3B describe circular arcs which are convex outward in a thickness direction of the sheet 1 from the opposite surfaces of the film 2. <IMAGE> |
