Nonwoven hydrophilic material for electrochemical battery separator and method of manufacturing

摘要

The subject invention relates to a hydrophilized separator material of nonwoven fabric that is useful for electrochemical cells having an aqueous alkaline electrolyte. The nonwoven fabric comprises a mixture of lower-melting and higher-melting polyamide and/or polyolefin fibers that are compressed together in a sealed manner by softening the lower-melting fiber portions with pressure and heat. The separator material is hydrophilized by moistening it with 0.5 to 7% by weight, with respect to the dry weight of the nonwoven fabric, of deionized water. The subject invention further relates to the method for hydrophilizing the nonwoven fabric.