| 摘要 |
PURPOSE:To enable deterioration in battery characteristics to be suppressed, even if a very small amount of heterogeneous metal or the like is mixed, by using a separator on which films containing polyvinyl alcohol and water-soluble high molecule serving as additive are formed. CONSTITUTION:A separator 4 is formed by impregnating alkali-proof resinous fiber with an aqueous solution containing polyvinyl alcohol of 25 wt% and starch of 10 wt%. And thin cloths composed of films 4a containing polyvinyl alcohol and starch serving as additive, which are obtained by a drying process for about twelve hours, are formed on the separator. Otherwise, the films 4a may be formed on only the positive electrode-sided surface, that is, the plane which becomes the outside one after bending the thin cloths. Hence, a cylindrical alkaline battery capable of improving its characteristics, even if a very small amount of heterogeneous metal or the like is mixed, can be obtained by using such a separator 4. |
