The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 13, 2010
Filed:
Jun. 13, 2005
Toshimitsu Harada, Okayama, JP;
Hisashi Nagi, Okayama, JP;
Hiroyuki Kawai, Osaka, JP;
Seiji Wada, Moriguchi, JP;
Eiji Tano, Moriguchi, JP;
Toshimitsu Harada, Okayama, JP;
Hisashi Nagi, Okayama, JP;
Hiroyuki Kawai, Osaka, JP;
Seiji Wada, Moriguchi, JP;
Eiji Tano, Moriguchi, JP;
Kuraray Co., Ltd., Kurashiki-shi, JP;
Panasonic Corporation, Kadoma-shi, JP;
Abstract
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 1.0×10to 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.