SEPARATOR FOR CLOSED TYPE LEAD-ACID BATTERY

摘要

A separator for a closed type lead-acid battery comprises a porous mat manufactured by a method wherein polyolefine synthetic pulp as its main component is mixed with a binder of a melting point lower than that of the synthetic pulp, the mixture is made into paper, and the paper is heat-treated at a temperature lower than the melting point of the synthetic pulp and higher than the melting point of the binder. The separator is cheap as no glass fiber is used, excellent in water retention and acid resistance, and has a low density. Closed type lead-acid batteries using this separator are excellent in capacity of discharging at a high rate at a low temperature.