Sandbag

Abstract

A sandbag has a bag, multiple adhesives and at least two filler layers. The bag is made of a water-permeable material and has an inner surface. The adhesives are mounted in the bag. The filler layers have water-absorbing polymers nebulized by a low pressure and sprayed on the adhesives evenly. The filler layers adhesive on the adhesives, so the filler layers will not move and can expand evenly.

1 . A sandbag having
 a bag made of a water-permeable material, being hollow and having a chamber defined in the bag;   at least two adhesives mounted in the bag; and   at least two filler layers comprising water-absorbing polymers, nebulized by a low pressure and then sprayed respectively on the adhesives evenly.   
   
   
       2 . The sandbag as claimed in  claim 1 , wherein:
 the bag further has an inner surface;   the adhesives are mounted on the inner surface of the bag; and   two filler layers are sprayed on the adhesives on the inner surface of the bag.   
   
   
       3 . The sandbag as claimed in  claim 1  further having
 a decomposable paper mounted in the chamber in the bag and having two opposite surfaces; and wherein:   the adhesives are mounted respectively on the surfaces of the decomposable paper; and   two filler layers are sprayed on the adhesives on the surfaces of the decomposable paper.   
   
   
       4 . The sandbag as claimed in  claim 1 , wherein each filler layer comprises ethylene vinyl acetate copolymer and polyacrylate salt. 
   
   
       5 . The sandbag as claimed in  claim 1 , wherein each of the filler layers further comprises a catalyst. 
   
   
       6 . The sandbag as claimed in  claim 1 , wherein the adhesives are water-soluble. 
   
   
       7 . The sandbag as claimed in  claim 1 , wherein the water permeable material of the bag is a natural fiber. 
   
   
       8 . The sandbag as claimed in  claim 1 , wherein the water permeable material of the bag is a synthetic fiber. 
   
   
       9 . The sandbag as claimed in  claim 1 , wherein the fiber is made of carbon. 
   
   
       10 . The sandbag as claimed in  claim 1 , wherein the fiber is inorganic. 
   
   
       11 . The sandbag as claimed in  claim 4 , wherein each water-absorbing polymer of the filler layer comprises ethylene vinyl acetate copolymer in a weight percentage from 10% to 45% and polyacrylate salt in a weight percentage from 55% to 90%. 
   
   
       12 . The sandbag as claimed in  claim 7 , wherein the natural fiber is linen. 
   
   
       13 . The sandbag as claimed in  claim 7 , wherein the natural fiber is cotton. 
   
   
       14 . The sandbag as claimed in  claim 7 , wherein the natural fiber is ramie. 
   
   
       15 . The sandbag as claimed in  claim 7 , wherein the natural fiber is animal fiber. 
   
   
       16 . The sandbag as claimed in  claim 8 , wherein the synthetic fiber is polyethylene. 
   
   
       17 . The sandbag as claimed in  claim 8 , wherein the synthetic fiber is polypropylene.