Urine absorbing and holding material

Claim 1

A urine absorbing and holding material comprising a supporting layer for a urine absorbing and holding component and a layer of a component: said supporting layer consisting of woven or non-woven fabrics, or a woven or non-woven fabric and a moisture-permeable waterproof film or cloth; said component being in the form of a powder, granules, flakes, fibers or a film, which is spread throughout the entire or a partial area of the supporting layer; wherein said component is selected from the group consisting of: (a) a homopolymer of a monomer selected from N-alkyl-or N-alkylene-substituted (meth)arcrylamides represented by the following general formula (I) or (II): ##STR3## wherein R 1 means a hydrogen atom or methyl group, R 2 denotes a hydrogen atom or methyl or ethyl group, and R 3 is a methyl, ethyl or propyl group, or ##STR4## wherein R 1 means a hydrogen atom or methyl group and A denotes --(CH 2 ) n , with n=4-6 or --(CH 2 ) 2 O(CH 2 ) 2 ; (b) a copolymer of two or more monomers selected from said N-alkyl- or N-alkylene-substituted (meth)acrylamides; or (c) a copolymer of at least one monomer selected from said N-alkyl- or N-alkylene-substituted (meth)acrylamides and one or more hydrophilic or ionic monomers other than said N-alkyl- or N-alkylene-substituted (meth)acrylamides but copolyermizable with said N-alkyl- or N-alkylene-substituted. (meth)acrylamides; said component being a water-insolubilized product of said homopolymer or said copolymers; and having such properties that even in the presence of a large excess of water said product shrinks and releases the absorbed water upon exposure to the atmosphere within the temperature range of 50°-120° C.