Separator for alkaline battery

Abstract

Abstract PURPOSE:To secure such a separator as enjoying long service life and being excellent in liquid retentivity, adsorbability and tensile strength, by using a laminate made up of a combination between a nonwoven fabric of a polypropylene superfine-fiber whose average fineness is in a specified range and another non woven fabric of an alkaliproof synthetic fiber. CONSTITUTION:A laminate combined between a nonwoven fabric made of a polypropylene superfine-fiber whose average fineness is of 0.01-0.5 denier and an alkaliproof synthetic fiber is used for a separator. As for the nonwoven fabric of the alkaliproof fiber being laminated together with the nonwoven fabric of this polypropylene superfine-fiber, a synthetic fiber such as a polypropylene fiber, a polypropylene-polyethylene compound fiber or the like being singled or mixed by way of example and made up into the nonwoven fabric getting through a wet process are used. And, the nonwoven fabric of the polypropylene superfine-fiber and one more nonwoven fabric of the alkaliproof synthetic fiber are joined together by an ordinary process whereby the desired laminate is produced. For example, a regular bonding agent is applied to one side or both nonwoven fabrics and afterward these nonwoven fabrics are laminated, pressed down under pressure or pressed by heat and pressure, thus these laminates are closed together in one.

Inventors

• 👤 Yohei Kawaguchi
• 👤 洋平 川口
• 👤 Takeshi Nakamura
• 👤 健 中村

Bibliographic Details