Alkaline battery separator and method for manufacturing same

• Main Authors: HAYAKAWA TOMOHIRO, KAWAI HIROYUKI, MITSUMORI HARUNA, KUSUNOKI TOSHIMICHI
• Format: Patent
• Language: Chinese; English
• Published: 06.08.2021
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The purpose of the present invention is to provide an alkaline battery separator which is suitable for manufacturing an alkaline battery with good productivity and which suppresses occurrence of winding shifts of the separator when incorporating the separator into a battery while satisfying various characteristics that are necessary for an alkaline battery separator. The alkaline battery separator comprises at least one type of an alkali-resistant fiber and a binder and has two surfaces, wherein the content of the binder is 5 to 20 mass% relative to the total mass of the separator, the value [Ra(A)/Ra(B)] is 0.700 to 0.980, where the arithmetic average surface roughness Ra(A) of a surface A, which is the smoother one of the two surfaces of the separator, is divided by the arithmetic average surface roughness Ra(B) of a surface B, which is the rougher one of the surfaces, and the arithmetic average surface roughness Ra(B) of the surface B is 3.0 to 10 [mu]m. 本发明的目的在于提供满足作为碱性电池用隔板所需的各种性能、并且在装入电池时抑制隔板的卷绕偏移的产生、适于