Abstract: A water-disintegrable sheet in which a base paper sheet is impregnated with an aqueous agent is provided. The base paper sheet has a weight per unit area of 30 to 150 gsm and includes a water-soluble binder and cellulose nanofibers. The aqueous agent includes a cross-linking agent which cross-links with a water-soluble binder. In the base paper sheet, content of the water-soluble binder and content of the cellulose nanofibers gradually increase from inside toward outside of the base paper sheet in a thickness direction. When a wear resistance test is performed three times using a Gakushin type fastness rubbing tester with a PP band as a rubbing finger and an average of measured values for the three times is calculated for each of a MD direction and a CD direction, each average value is at least 40.

Abstract: A hydrolytic sheet is obtained by impregnating a base paper sheet with an aqueous agent. The base paper sheet has a weight per unit area of 30 to 150 gsm and includes a water-soluble binder. The aqueous agent includes a cross-linking agent which cross-links with the water-soluble binder and cellulose nanofiber.

Abstract: A hydrolytic sheet is obtained by impregnating a base paper sheet with an aqueous agent. The base paper sheet has a weight per unit area of 30 to 150 gsm and includes a water-soluble binder. The aqueous agent includes a cross-linking agent which cross-links with the water-soluble binder and cellulose nanofiber.

Abstract: Household tissue paper is obtained by applying a ply process to two or more sheets of base paper. First embossments and second embossments, arranged around the first embossments, are formed on an entire surface of the household tissue paper, a shape of a protruding part of each of the second embossments differing from a shape of a protruding part of each of the first embossments. Hence, because a contact area with an object to be cleaned or the like can be increased, it is possible to enhance surface strength of the household tissue paper being embossed and to enhance wiping performance.

Abstract: A toilet cleaning sheet 100 includes a multi-ply base paper sheet that is substantially water-dispersible. The multi-ply base paper sheet contains pulp and a water-soluble binder and is impregnated with an aqueous chemical agent. The basis weight of the multi-ply base paper sheet is 30 gsm to 150 gsm, and the content of the water-soluble binder increases towards a front surface and/or a back surface.

Abstract: A water-disintegrable sheet in which a base paper sheet is impregnated with an aqueous agent is provided. The base paper sheet has a weight per unit area of 30 to 150 gsm and includes a water-soluble binder and cellulose nanofibers. The aqueous agent includes a cross-linking agent which cross-links with a water-soluble binder. In the base paper sheet, content of the water-soluble binder and content of the cellulose nanofibers gradually increase from inside toward outside of the base paper sheet in a thickness direction. When a wear resistance test is performed three times using a Gakushin type fastness rubbing tester with a PP band as a rubbing finger and an average of measured values for the three times is calculated for each of a MD direction and a CD direction, each average value is at least 40.

Abstract: A toilet cleaning sheet 100 includes a multi-ply base paper sheet that is substantially water-dispersible. The multi-ply base paper sheet contains pulp and a water-soluble binder and is impregnated with an aqueous chemical agent. The basis weight of the multi-ply base paper sheet is 30 gsm to 150 gsm, and the content of the water-soluble binder increases towards a front surface and/or a back surface.

Abstract: A hydrolysable sheet obtained by impregnating a base paper sheet, to which a water-soluble binder is added, with a chemical solution, wherein the base paper sheet is obtained by applying a ply process to a plurality of sheets of base paper and has a basis weight of from 30 gsm to 150 gsm, wherein a compounding ratio of softwood pulp to hardwood pulp is less than 1/1, wherein the chemical solution contains a cross-linking agent, which causes the water-soluble binder to initiate a cross-linking reaction, and a trihydric or higher alcohol, and wherein, with respect to a weight of the base paper sheet, the base paper sheet is impregnated with the trihydric or higher alcohol at 1% to 20% by weight.

Abstract: Household tissue paper is obtained by applying a ply process to two or more sheets of base paper. First embossments and second embossments, arranged around the first embossments, are formed on an entire surface of the household tissue paper, a shape of a protruding part of each of the second embossments differing from a shape of a protruding part of each of the first embossments. Hence, because a contact area with an object to be cleaned or the like can be increased, it is possible to enhance surface strength of the household tissue paper being embossed and to enhance wiping performance.