Panasonic Corporation

Kuraray Co., Ltd.

Eiji Tano

Hiroyuki Kawai

Seiji Wada

Toshimitsu Harada

Hisashi Nagi

A separator for alkaline batteries which is obtained by bonding 5.0 to 45.0 g/mof a highly hygroscopic macromolecular compound of the crosslinking type having carboxyl group to a wetlaid nonwoven fabric comprising an alkali-resistant fiber, followed by crosslinking the macromolecular compound, wherein a silicate compound is added to the highly hygroscopic macromolecular compound of the crosslinking type in an amount of 1.0&#xd7;10to 10 mg/cmper unit area of the separator. By adding the silicate compound, absorption of the electrolyte is increased, the electrolyte can be held for a long time, the electric resistance of the separator itself can be kept small, growth of dendrite can be suppressed, short circuit due to the formed dendrite can be prevented, the volume of the negative electrode material can be increased by suppressing the thickness of the separator after absorbing the electrolyte, impact of dropping can be endured, and oxidative degradation in the alkaline dry cells can be suppressed. An alkaline primary battery can be constructed using the separator.

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Moriguchi, Japan

Eiji Tano