BATTERY SEPARATOR AND METHOD OF MAKING

摘要

A battery separator (10) for use in flooded cell type lead acid batteries comprising a backweb of a porous, acid resistant, embossable material with a plurality of major ribs (14) and submini-ribs extending from at least one planar surface (12) of the backweb. The ribs (14) are located across the width of the backweb and extend in a direction substantially parallel to the longitudinal edges (16, 18) of the backweb. Each major rib (14) overlies at least one submini-rib (15) and is an embossed corrugated structure comprised of alternating ridges and furrows (22, 23). The ridges and furrows (22, 23) are in non-parallel alignment to the longitudinal dimension of the separator, and preferably perpendicular thereto. The major ribs are formed on a battery separator (10) backweb having a plurality of submini-ribs (15) extending from at least one planar surface (12) thereof by passing the backweb through the nip formed by a pair of opposed embossing rollers and embossing the backweb in the area of at least one submini-rib (15).