| 摘要 |
PURPOSE:To improve the permeation of ions or the like, by stacking a nonwoven fabric of single synthetic fibers of a prescribed diameter on a cloth of single fibers of a prescribed diameter to make a battery separator whose passages for the ions or the like are not closed. CONSTITUTION:A separator, in which a cloth 2 and a nonwoven fabric 3 are stacked together, is provided between a positive electrode plate 1 and a negative electrode plate 4 so that an electrode plate assembly is constituted for a lead storage battery or the like. The nonwoven fabric 3 is made of one web of very thin single synthetic fibers of 0.1-2mum in diameter or made of a plurality of such webs stacked together. The cloth 2 is made of single fibers of 5mum or more in diameter. The web for the nonwoven fabric 3 is preferably a long polyester fiber web manufactured by a melt-blow process. The fabric 3, the gap between the fibers of which is small, and the cloth 2, the gap between the fibers of which is large, are thus combined together to constitute the separator whose passages for ions or the like are not closed and whose chemical stability and processing property are good. |
