Composite sheet material, disposable wearing article using the same, and production method and production apparatus for composite sheet material
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United States of America Patent
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Apr 28, 2020
Grant Date -
Oct 15, 2015
app pub date -
Nov 15, 2013
filing date -
Nov 30, 2012
priority date (Note) -
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Abstract
The present invention provides a composite sheet material in which a three-dimensional sheet material and a flat sheet material are firmly joined to each other and which is excellent in ventilation and the like, soft, and good in touch. In the composite sheet material, a three-dimensional sheet material having a large number of protruding portions formed thereon and a flat sheet material not having such protruding portions are layered on each other and joined. The three-dimensional sheet material is joined to the flat sheet material at joining parts apart from protruding portions. A plurality of joining parts are formed around each protruding portion in such a manner as to surround the protruding portion. The area of the joining part is less than 50% of that of a base surrounded by the protruding portions. Some of the joining parts are provided with a through hole penetrating the composite sheet material.
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