GASKET FOR ALKALINE DRY BATTERY AND MANUFACTURING METHOD THEREOF

• Main Authors: YANOKI HIDEYUKI, MIYATA YOICHI, HORII MINORU
• Format: Patent
• Language: English; Japanese
• Published: 15.11.2018
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PROBLEM TO BE SOLVED: To provide a gasket for alkaline dry battery in which liquid leakage due to a carbide of a polyamide resin raw material does not occur, the flowability at the time of molding is excellent, the wrinkling of a molten metal is hard to occur, a thin wall portion serving as an explosion-proof safety valve can be normally broken until the life of the alkaline dry battery is exhausted, and the life can be prolonged, and a manufacturing method thereof.SOLUTION: In a gasket for an alkaline dry battery formed by injection molding using a resin composition and partially having a thin portion, the resin composition is a polyamide 610 resin composition that contains a polyamide 610 resin as a main component, and in which the viscosity number of the polyamide 610 resin is in the range of 80 ml/g or more and 145 ml/g or less, and that contains a molding aid such as a crystal nucleating agent and a releasing agent.SELECTED DRAWING: Figure 1 【課題】ポリアミド樹脂原料の炭化物による液漏れが発生することなく、成形時の流動性に優れて湯じわが発生し難く、アルカリ乾電池の寿命が尽きるまで防爆安全弁となる薄肉部が正常に破断させることができて長寿命化を可能とするアルカリ電池用ガスケットおよびその製造方法を提供する。【解決手段】樹脂組成物を用いて射出成形により形成され、一部に薄肉部を有するアルカリ乾電池用ガスケットにおいて、樹脂組成物は、ポリアミド６１０樹脂を主成分とし、そのポリアミド６１０樹脂の粘度数が８０ｍｌ／ｇ以上１４５ｍｌ／ｇ以下の範囲であり、結晶核剤および離型剤などの成形助剤が含まれたポリアミド６１０樹脂組成物である。【選択図】図１