| 摘要 |
PURPOSE:To manufacture a battery separator with excellent durability and properties of electrolytic impregnation by sulfonation-processing a porus body made of an olefin (co)polymer and immersing it in an organic solvent which is insouble in water and sulfonated solutions, and then in water. CONSTITUTION:After a belt-type separator material 1 such as woven or unwoven cloth made of an olefin polymer or copolymer is drawn from a coil 2, immersed in the sulfonated solution 4 in a sulfonating container 3, and sulfonation-processed, then the solution 4 is squeezed by rollers 6 and 6. Then the stuck solution 4 is replaced with a solvent 8 by immersing the separator material in an organic solvent 8 contained in a organic solvent container 7 which is substantially insoluble in the water and solution 4. Subsequently, after the solvent 8 is squeezed by a roller 10, the stuck solvent 8 is replaced with water 12 by immersing the separator material in the water 12 within a cleaning water container 11. Then after a sulfonic radical is changed into alkaline salt by immersing the separator material in an alkaline aqueous solution 16 within an alkaline container 15, the aqueous solution 16 is squeezed by a roller 18. |
