Importance

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Abstract

Here is disclosed a flexible and air-permeable plastic sheet comprising a plurality of first direction ribs (Y.sub.1, Y.sub.2, . . . ) each having opposite sides (2, 3) extending in the first direction (Y) and curved downward crossing a plurality of second direction ribs (X.sub.1, X.sub.2, . . . ) each having opposite sides (4, 5) extending in the second direction (X) and curved downward so that each pair of adjacent first direction ribs and each pair of adjacent second direction ribs crossing these first direction ribs define together an air-permeable vacant space. At each crossing (C.sub.1, C.sub.2, C.sub.3, C.sub.4), one of the ribs bulges upward and opposite side edges of this rib crosses the top (T.sub.1, T.sub.2) of the other rib. The plastic sheet of this invention is featured by less gloss and less sticky touch, and preferably used as a topsheet of a disposable hygienic wearable article.

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First Claim