Alkaline battery separator and alkaline primery battery

A technology for alkaline batteries and diaphragms, applied in dry batteries, battery pack components, circuits, etc., can solve problems such as short circuit, insufficient rigidity of the diaphragm, leakage of negative electrode gel, etc., to suppress area shrinkage and swelling, improve compactness, Effect of preventing internal short circuit
CN101128948AActive Publication Date: 2008-02-20KURARAY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
KURARAY CO LTD
Publication Date
2008-02-20
Patent Text Reader

Abstract

An alkaline battery separator comprising an alkali-resistance synthetic fiber, a fibrillated organic solvent-spun cellulose fiber having a Canadian standard freeness value of 10 to 280 ml, and a mercerized pulp having a Canadian standard freeness value of not less than 550 ml is prepared. In the separator, the proportion of the alkali-resistance synthetic fiber, the proportion of the fibrillated organic solvent-spun cellulose fiber, and the proportion of the mercerized pulp relative to the total amount of the separator are respectively 25 to 62% by mass, 5 to 25% by mass, and 33 to 50% by mass, provided that the total amount of the separator is 100% by mass. The alkali-resistance synthetic fiber may comprise a polyvinyl alcohol-series fiber having an average fiber fineness of not more than 1 dtex. The alkaline battery separator may further comprise a polyvinyl alcohol-series binder in a proportion of 3 to 20% by mass relative to the total amount of the separator. The alkaline battery separator of the present invention may have a shrinkage by the of not more than 3.5% after immersing in an aqueous solution of potassium hydroxide having a concentration of 40% by mass at 80°C for 24 hours and a stiffness strength of not less than 2 N.
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Description

technical field

[0001] The present invention relates to a battery separator suitable for an alkaline battery, such as an alkaline manganese battery, a mercury battery, a silver oxide battery or a zinc-air battery, and an alkaline battery having the battery separator. In more detail, the present invention relates to electrolytic solutions having durability and improved performance against shrinkage caused by electrolytes such as potassium hydroxide (KOH) aqueous solutions or polar agents such as manganese dioxide (such as electrolytes used to generate electrogenic reactions). Fully maintained, reduced internal resistance that does not interfere with ion conduction) and an alkaline battery having the battery separator. Background technique

[0002] In general, separators are used to separate the positive and negative active materials in alkaline primary batteries. Diaphragms require various properties such as the following:

[0003] 1. Prevent internal short circuit caused b...

Claims

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