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1. (WO2018199300) LEAD ACID BATTERY SEPARATOR

Pub. No.:    WO/2018/199300    International Application No.:    PCT/JP2018/017246
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Sat Apr 28 01:59:59 CEST 2018
IPC: H01M 2/18
Applicants: NIPPON SHEET GLASS COMPANY, LIMITED
日本板硝子株式会社
Inventors: ONISHI Masaki
大西 正輝
SHIDOMI Takashi
蔀 貴史
KAWACHI Masahiro
川地 正浩
Title: LEAD ACID BATTERY SEPARATOR
Abstract:
[Problem] To provide a lead acid battery separator which comprises a microporous film and which is resistant to formation of holes therein. [Solution] A lead acid battery separator provided with: a base portion 3 comprising a microporous film having a thickness of 0.1 to 0.3 mm; a plurality of main ribs 2a provided on one surface 3a of the base portion 3; and a plurality of mini-ribs 2b which are provided on the other surface 3b of the base portion 3 and has a height lower than a height of the main ribs 2a. The plurality of mini-ribs 2b are provided linearly so that a rib-to-rib distance P which is the distance between opposing surfaces of adjacent mini-ribs 2b is less than 1.9 mm.