Separator for electrolytic capacitors.

摘要

This invention provides a separator for electrolytic capacitors which retains paper tenacity enough to be free of difficulty in the production and handling of the condensers and maintain yield of products, and whose paper had a low density uncomparable to conventional ones, thus giving rise to a considerably decreased impedance. According to this invention, a separator for electrolytic capacitors made of paper or nonwoven fabric which includes a sparingly soluble polyvinyl alcohol fiber as a main fiber, and a readily soluble polyvinyl alcohol fiber as a binder binding the main fiber, the main fiber having a monofilament fineness of at most 1 dr; the main fiber containing at least 10% by weight based on total weight thereof of a sparingly soluble polyvinyl alcohol fiber having a non-circular cross section such as T-, Y-, X- or asteric-shaped transverse cross section; and the separator having a density of at most 0.25 g/cm<3>.