Hot melt adhesive for electric power equipment

Abstract

Disclosed is a hot melt adhesive with quick tack loss and superior heat resistance that is capable of contributing to improvements in the productivity and safety of electric power equipment. Additionally disclosed is electric power equipment that is produced using the hot melt adhesive. The hot melt adhesive for the electric power equipment comprises (A) a copolymer of an ethylene and a carboxylic acid derivative with an ethylene double bond, (B) a polypropylene wax, (C) a polyethylene wax, and (D) a Fischer-Tropsch wax. (A) An ethylene-vinyl acetate copolymer is preferable as the copolymer. The electronic power equipment can be excellently produced by using the abovementioned hot melt adhesive.

Description

technical field [0001] This invention relates to hot melt adhesives for electrical equipment. In this specification, "electrical equipment" refers to equipment that converts other energy into electrical energy (electric power), equipment that converts electrical energy into other energy, and equipment that stores energy other than electrical energy. Specific examples of such electrical equipment include chemical batteries such as alkaline dry batteries and lithium ion batteries, solar batteries, and physical batteries such as capacitors. Background technique [0002] Electric devices can be used in the electronics field or in automobiles in various forms such as primary batteries, secondary batteries, and capacitors, for example. In particular, lithium ion batteries, which are one type of nonaqueous electrolyte batteries, are widely used as power sources for portable devices such as mobile phones and notebook personal computers due to their high energy density. In addition...

AI Technical Summary

Problems solved by technology

When an insulating resin containing such an organic solvent is used to manufacture electric equipment such as a lithium-ion battery, a drying process of the organic solvent is required, and the productivity of the electric equipment decreases.

[0007] Furthermore, in the insulating resins of Patent Documents 1 to 3, the loss of viscosity is slow, the curing is also slow, and the heat resistance is not sufficient.

In the manufacture of lithium-ion batteries, there is a process of winding the positive and negative electrodes and the separator into a cylindrical or flat shape, so the insulating resin, which takes time to lose its viscosity and harden, may fail during winding.

In addition, it is generally considered that when electrical equipment is manufactured from insulating resins with insufficient heat resistance, it is believed that fires will occur due to the heat generated by the electrical equipment.