Sheet-like water-disintegratable cleaner

Abstract

There is provided a water-disintegratable cleaner which is light in weight because of its being free from water, does not require a fungicide or a bactericide because of no risk of mold, is excellent in cleaning performance, compared to conventional wet disintegratable cleaners, and can be flushed down a toilet or the like. A sheet-like water-disintegratable cleaner having a total basis weight of 10 to 250 g/m 2 in which a web layer (ii) having a basis weight of 5 to 200 g/m 2 produced by an air-laid process, which comprises 100 to 5% by weight of a powdery organic acid (a) having a hydroxyl group and a melting point of 70 to 160° C. and 0 to 95% by weight of cellulosic pulp (b) (with the proviso that (a)+(b)=100% by weight) as main components, is laminated on water-disintegratable paper (i) having a basis weight of 5 to 25 g/m 2 comprising cellulosic pulp as a main component, and the same water-disintegratable paper (iii) as the above (i) is further laminated on the web layer (ii) as needed. A binder component (c) may be further incorporated in the web layer (ii).

1 . A sheet-like water-disintegratable cleaner having a total basis weight of 10 to 250 g/m 2  in which a web layer (ii) having a basis weight of 5 to 200 g/m 2  produced by an air-laid process, which comprises 100 to 5% by weight of a powdery organic acid (a) having a hydroxyl group and a melting point of 70 to 160° C. and 0 to 95% by weight of cellulosic pulp (b) (with the proviso that (a)+(b)=100% by weight) as main components, is laminated on water-disintegratable paper (i) having a basis weight of 5 to 25 g/m 2  comprising cellulosic pulp as a main component, and the same water-disintegratable paper (iii) as the above (i) is further laminated on the web layer (ii), followed by hot pressing calendering treatment. 
   
   
       2 . The sheet-like water-disintegratable cleaner according to  claim 1 , wherein the organic acid (a) has an average particle size of 0.1 to 1 mm. 
   
   
       3 . The sheet-like water-disintegratable cleaner according to  claim 1 , wherein the organic acid (a) is at least one selected from the group consisting of malic acid, citric acid, tartaric acid, gluconolactone and a salt thereof. 
   
   
       4 . The sheet-like water-disintegratable cleaner according to  claim 1 , wherein the organic acid (a) has a basis weight of 1 to 50 g/m 2 . 
   
   
       5 . The sheet-like water-disintegratable cleaner according to  claim 1 , wherein the web layer (ii) further contains at least one binder component (c) selected from the group consisting of the heat-adhesive synthetic fiber, polyolefinic pulp, a powder of a low-melting resin and a water-soluble resin, and the component (a) is from 5 to 50% by weight, the component (b) is from 40 to 94% by weight and the component (c) is from 1 to 10% by weight (with the proviso that (a)+(b)+(c)=100% by weight). 
   
   
       6 . The sheet-like water-disintegratable cleaner according to  claim 5 , wherein the powder of the low-melting resin constituting the component (c) is at least one selected from the group consisting of polyethylene, polypropylene, a polyvinyl chloride-based resin, polyvinyl acetate, an acrylic acid ester-based resin, an ethylene-vinyl acetate copolymer, a low-melting polyester, a low-melting polyamide and an ionomer resin. 
   
   
       7 . The sheet-like water-disintegratable cleaner according to  claim 6 , wherein the water-soluble resin constituting the component (c) is at least one selected from the group consisting of polyvinyl alcohol, carboxymethylcellulose and a water-soluble derivative thereof, a water-soluble size and starch. 
   
   
       8 . The sheet-like water-disintegratable cleaner according to  claim 1 , wherein when used as a cleaner, the sheet-like water-disintegratable cleaner is wetted with water to use. 
   
   
       9 . The sheet-like water-disintegratable cleaner according to  claim 2 , wherein the organic acid (a) is at least one selected from the group consisting of malic acid, citric acid, tartaric acid, gluconolactone and a salt thereof. 
   
   
       10 . The sheet-like water-disintegratable cleaner according to  claim 2 , wherein the organic acid (a) has a basis weight of 1 to 50 g/m 2 . 
   
   
       11 . The sheet-like water-disintegratable cleaner according to  claim 3 , wherein the organic acid (a) has a basis weight of 1 to 50 g/m 2 . 
   
   
       12 . The sheet-like water-disintegratable cleaner according to  claim 9 , wherein the organic acid (a) has a basis weight of 1 to 50 g/m 2 . 
   
   
       13 . The sheet-like water-disintegratable cleaner according to  claim 2 , wherein the web layer (ii) further contains at least one binder component (c) selected from the group consisting of the heat-adhesive synthetic fiber, polyolefinic pulp, a powder of a low-melting resin and a water-soluble resin, and the component (a) is from 5 to 50% by weight, the component (b) is from 40 to 94% by weight and the component (c) is from 1 to 10% by weight (with the proviso that (a)+(b)+(c)=100% by weight). 
   
   
       14 . The sheet-like water-disintegratable cleaner according to  claim 3 , wherein the web layer (ii) further contains at least one binder component (c) selected from the group consisting of the heat-adhesive synthetic fiber, polyolefinic pulp, a powder of a low-melting resin and a water-soluble resin, and the component (a) is from 5 to 50% by weight, the component (b) is from 40 to 94% by weight and the component (c) is from 1 to 10% by weight (with the proviso that (a)+(b)+(c)=100% by weight). 
   
   
       15 . The sheet-like water-disintegratable cleaner according to  claim 4 , wherein the web layer (ii) further contains at least one binder component (c) selected from the group consisting of the heat-adhesive synthetic fiber, polyolefinic pulp, a powder of a low-melting resin and a water-soluble resin, and the component (a) is from 5 to 50% by weight, the component (b) is from 40 to 94% by weight and the component (c) is from 1 to 10% by weight (with the proviso that (a)+(b)+(c)=100% by weight). 
   
   
       16 . The sheet-like water-disintegratable cleaner according to  claim 2 , wherein when used as a cleaner, the sheet-like water-disintegratable cleaner is wetted with water to use. 
   
   
       17 . The sheet-like water-disintegratable cleaner according to  claim 3 , wherein when used as a cleaner, the sheet-like water-disintegratable cleaner is wetted with water to use. 
   
   
       18 . The sheet-like water-disintegratable cleaner according to  claim 4 , wherein when used as a cleaner, the sheet-like water-disintegratable cleaner is wetted with water to use. 
   
   
       19 . The sheet-like water-disintegratable cleaner according to  claim 5 , wherein when used as a cleaner, the sheet-like water-disintegratable cleaner is wetted with water to use. 
   
   
       20 . The sheet-like water-disintegratable cleaner according to  claim 6 , wherein when used as a cleaner, the sheet-like water-disintegratable cleaner is wetted with water to use.