Absorber in a sheet form and absorber product using the same
First Claim
1. An absorbent sheet comprising convex and concave portions on its surface and having a spontaneous three-dimensional structure, wherein when a difference in level between the convex portions and the concave portions is A mm before a liquid is absorbed, the difference in level between the convex portions and the concave portions becomes 2A mm or more after it absorbs the liquid to swell so that it bulges in parts.
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Accused Products
Abstract
An absorbent sheet having concave and convex portions on its surface and spontaneously exhibiting a three-dimensional structure in that a concave-convex structure is formed wherein when the difference in level between the concave and the convex portion is A mm in a state where water is not absorbed (dry state) the difference in level between the concave and the convex portion becomes 2A or more after water is absorbed, due to the bulging in parts caused by absorption of water and resultant swelling.
114 Citations
25 Claims
- 1. An absorbent sheet comprising convex and concave portions on its surface and having a spontaneous three-dimensional structure, wherein when a difference in level between the convex portions and the concave portions is A mm before a liquid is absorbed, the difference in level between the convex portions and the concave portions becomes 2A mm or more after it absorbs the liquid to swell so that it bulges in parts.
Specification