Sheet of nonwoven fabric

Abstract

Provided is a sheet of nonwoven fabric having excellent cleaning performance. The sheet of nonwoven fabric includes a web layer formed by an air-laid method. The sheet of nonwoven fabric includes powder producing alkalinity when in contact with moisture, and has a water-absorbing material as a main component.

1 . A nonwoven fabric sheet including a web layer formed by an air-laid method, the nonwoven fabric sheet comprising:
 powder producing alkalinity when in contact with moisture, wherein the web layer is made of water-absorbing material as a main component.   
     
     
         2 . The nonwoven fabric sheet according to  claim 1 , wherein the powder is included in the web layer. 
     
     
         3 . The nonwoven fabric sheet according to  claim 2 , wherein the powder is unevenly distributed on one surface of the web layer in a thickness direction of the web layer. 
     
     
         4 . The nonwoven fabric sheet according to  claim 2 , wherein the powder is distributed uniformly in a thickness direction of the web layer. 
     
     
         5 . The nonwoven fabric sheet according to  claim 1 , wherein the powder is laminated in layers in the web layer. 
     
     
         6 . The nonwoven fabric sheet according to  claim 1 , wherein the web layer is made of water-absorbing fiber as a main component. 
     
     
         7 . The nonwoven fabric sheet according to  claim 1 , wherein the nonwoven fabric sheet comprises particulate thermofusible resin with a particle size from 1 μm to 1000 μm. 
     
     
         8 . The nonwoven fabric sheet according to  claim 1 , wherein the web layer comprises fibrous thermofusible resin with fineness of 1 dtex to 120 dtex and average fiber length from 1 mm to 100 mm. 
     
     
         9 . The nonwoven fabric sheet according to  claim 1 , wherein the nonwoven fabric sheet comprises a water-permeable or water-absorbing sheet adjacent to the web layer. 
     
     
         10 . The nonwoven fabric sheet according to  claim 5 , wherein the nonwoven fabric sheet comprises a water-permeable or water-absorbing sheet adjacent to the powder arranged in layers in contact with the web layer. 
     
     
         11 . The nonwoven fabric sheet according to  claim 1 , wherein one surface of the nonwoven fabric sheet is provided with a film layer comprising a film. 
     
     
         12 . The nonwoven fabric sheet according to  claim 1 , wherein the nonwoven fabric sheet further comprises an acidic layer including powder producing acidity when in contact with moisture. 
     
     
         13 . The nonwoven fabric sheet according to  claim 1 , wherein
 the nonwoven fabric sheet comprises a pH indicator and a carrier in the same layer as a layer of the powder; and   the pH indicator is fixed to the carrier by quaternary ammonium salt.   
     
     
         14 . The nonwoven fabric sheet according to  claim 13 , further comprising a binder, wherein the pH indicator is fixed to the carrier by the quaternary ammonium salt and the binder. 
     
     
         15 . The nonwoven fabric sheet according to  claim 3 , wherein one surface of the nonwoven fabric sheet is provided with a film layer comprising a film. 
     
     
         16 . The nonwoven fabric sheet according to  claim 5 , wherein one surface of the nonwoven fabric sheet is provided with a film layer comprising a film. 
     
     
         17 . The nonwoven fabric sheet according to  claim 3 , wherein the nonwoven fabric sheet comprises particulate thermofusible resin with a particle size from 1 μm to 1000 μm 
     
     
         18 . The nonwoven fabric sheet according to  claim 3 , wherein thermofusible resin is partially coating the powder. 
     
     
         19 . The nonwoven fabric sheet according to  claim 7 , wherein the particulate thermofusible resin is partially coating the powder.