| 摘要 |
PROBLEM TO BE SOLVED: To obtain a paper additive for improving water and moisture retaining properties of the paper used for indoor paper such as a shoji, a fusuma, wallpaper and the like and water-absorbing materials such as food packaging materials, disposable diapers and the like and provide the water and moisture retaining paper. SOLUTION: The paper additive contains a water swelling or water insoluble sodium carboxymethylcellulose. Especially, the salt having 0.05-0.5 degree of carboxymethyl substitution per glucose residue and 2-300 mPa*s viscosity of 1% aqueous solution is preferable. COPYRIGHT: (C)2003,JPO
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