A METHOD OF MARKING A SHETT MATERIAL FOR USE IN A BATTERY SEPARATOR AND A BATTERY SEPERATOR HAVING A SHEET MATERIAL SO MADE

摘要

A battery separator having a low electrical resistance after extended use is made by thermal consolidation and thermal embossing of a paper web formed from a furnish containing a synthetic pulp the fibrils of which are filled with an inorganic filler, the web incorporating a wetting agent which is preferably an organic sulphonate, and organic succinate, or a phenol ethoxylate.