SEPARATOR FOR A TUBULAR TYPE BATTERY

摘要

PURPOSE:To decrease internal resistance by winding a sheet material containing hot melt material in a cylindrical form and hot-melt-bonding it at only upper and lower ends to form a separator which is placed between positive and negative active materials. CONSTITUTION:A cylindrical separator 10 which is placed between positive active material 24 and negative active material 22 of an alkaline cylindrical battery is prepared by winding a nonwoven fabric or synthetic paper sheet 12 comprising thermoplastic resin such as polystyrene in a cylindrical form, and the upper and lower ends 16 are bonded by hot melting. When the separator is placed in a battery, the bonded parts 16 locate in the outside of the height of positive and negative active materials. Therefore, since joint of the separator 10 does not disturb movement of electrolyte, internal resistance is decreased and discharge performance and utilization of active material are increased.