| 摘要 |
PURPOSE:To improve the liquid-leakproofness by using a regenerated cellulose film which is made of cellulose acetate serving as its raw material and composed of the continuous porous substance having the three-dimensional structure, as an electrolyte absorbing substance, in substitution for nonwoven fabric in this former use. CONSTITUTION:An electrolyte absorbing substance 3 interposed between a negative electrode 2 and a separator 4, which makes contact with a positive electrode 1 and is composed of a graft-polymerized film layer 4A, cellophane 4B, and a graft-polymerized film layer 4C is composed of a regenerated cellulose film 30 which is made of cellulose acetate serving as its raw material and composed of the continuous porous substance having the three-dimensional structure. Therefore, the battery reaction can be carried-out freely from trouble, owing to the superior electrolyte absorbing faculty and the liquid passing performance of the film 30, and napping in the conventional nonwoven fabric can be eliminated, so the liquid-leakproofness can be improved markedly. |
