Terminal-equipped electric wire and manufacturing method for same

Abstract

The purpose of the present invention is to increase the waterproofness of the portion of a terminal-equipped electric wire between an insulation coating and a waterproof resin section without the need for an increase in workload or equipment for manufacturing the wire. A terminal-equipped electric wire (1) is provided with an insulated wire (10) with insulation coating (12) of polyolefin-based resin, an adhesive layer (30) formed on the surface of the insulation coating (12) around the entire circumference thereof, and a waterproof resin section (40) formed by insert molding. The waterproof resin section (40) covers from the adhesive layer (30) section of the insulated wire (10) to a core (11) connection section (21) of a metal terminal (20). The adhesive layer (30) comprises a mixture of a copolymer of ethylene and glycidyl methacrylate and a phenol-based curing agent. The waterproof resin section (40) comprises an aromatic nylon.

Description

technical field [0001] The present invention relates to an electric wire with a terminal including an insulated electric wire and a metal terminal provided at an end thereof, and a method for manufacturing the same. Background technique [0002] Recently, in wire harnesses mounted on automobiles, higher waterproof performance is required for terminal-equipped electric wires including insulated electric wires and metal terminals provided at the ends thereof. The terminal-equipped electric wire having a waterproof function includes a waterproof resin portion covering a waterproof region at the end. Hereinafter, the terminal-provided electric wire provided with the waterproof resin part is referred to as a terminal-provided waterproof electric wire. [0003] The waterproof resin part is made of a synthetic resin material, and is formed by insert-molding the protected area including the area from the insulating coating at the end of the insulated wire to the connecting part wit...

AI Technical Summary

Problems solved by technology

[0006] However, in the case where an insulated wire has an insulating coating layer of polyolefin resin as an olefin resin, if silicon resin or rubber resin is used, the adhesiveness (water-stopping property) of the insulating coating layer and the waterproof resin part is not good. full

Therefore, water intrusion into the connecting portion between the core wire and the metal terminal is likely to occur, and this water immersion causes corrosion and poor contact of the connecting portion between the core wire and the metal terminal.

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