Manufacturing method of glass fiber sheet for sealed lead-acid battery separator, sealed lead-acid battery separator, and glass fiber sheet for sealed lead-acid battery separator

摘要

PROBLEM TO BE SOLVED: To provide a glass fiber sheet for a sealed lead-acid battery separator having little variation in electrolyte liquid permeability and good cutability during a slitting process. SOLUTION: The glass fiber sheet for a sealed lead battery separator according to the present invention contains glass wool and a fully melt type heat melt type binder fiber having a fiber diameter of more than 14 μm and a fiber length of 2 to 10 mm. The mass ratio of glass wool to total melt type heat melt type binder fiber is 97/3 to 80/20, and the total mass of glass wool and total melt type heat melt type binder fiber is 80% or more and 100% of the total mass. A glass fiber sheet for a sealed lead battery separator in which the mass of the total melt type heat melt type binder fiber is 3% or more and 20% or less of the total mass, and is a glass fiber sheet for a sealed lead battery separator. Does not contain core-sheath type heat-melt binder fiber and does not contain monofilament-like non-heat-adhesive organic fiber. [Selection diagram] None