| 摘要 |
PROBLEM TO BE SOLVED: To provide a sandbag of which the speed of a water absorption and an expansion is high and the quantity of a water absorption and the quantity of a water retention are large, and with which a waste can be effectively utilized by using a large number of wastepaper while facilitating a treatment after a use by using a natural material having degrability as a raw material. SOLUTION: A swelling material in which the fragments of wastepaper, starch powder, mannan powder and a diatomite are mixed is housed in a bag for a sandbag being manufactured of a biodegrading starch resin mainly comprising the starches of a corn and having a permeability. The fragments of wastepaper are contained basically at 50 to 70% at a weight ratio, starch powder at 15 to 30%, mannan powder at 10 to 20% and the diatomite at 10 to 20% in the swelling material, and the swelling material is molded in a sheet shape or a mat shape. COPYRIGHT: (C)2004,JPO&NCIPI
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