Electric wire with terminal and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-2020119468-A1
Application number	US-201716624606-A
Country	US
Kind code	A1
Filing date	Dec 20, 2017
Priority date	Jun 23, 2017
Publication date	Apr 16, 2020
Grant date	—

Abstract

An electric wire with a terminal, includes an insulated wire which includes a core wire and an insulating layer covering the core wire, a seal member which is disposed in one end portion of the insulated wire and covers the insulating layer, a metal terminal which extends from the end portion of the insulated wire and is connected to the core wire and a waterproof resin portion which covers from a seal member covering part of the insulated wire to an electrical connection part of the metal terminal. The insulating layer contains an olefin resin. The waterproof resin portion contains a polyester, a polyamide, an ethylene-vinyl acetate copolymer, or a mixed resin thereof. The seal member includes an inner layer containing an ethylene resin and an outer layer laminated on the inner layer and containing a polyester, a polyamide, an ethylene-vinyl acetate copolymer, or a mixed resin thereof.

First claim

1 . An electric wire with a terminal, comprising:
an insulated wire which includes a conductive core wire and an insulating layer covering an outer periphery of the core wire; a cylindrical seal member which is disposed in a vicinity of one end portion of the insulated wire and which covers an outer periphery of the insulating layer; a metal terminal which extends from the end portion of the insulated wire and which is electrically connected to the core wire; and a waterproof resin portion which covers at least a part from a seal member covering part of the insulated wire to an electrical connection part of the metal terminal, wherein the insulating layer contains an olefin resin as a main component, wherein the waterproof resin portion contains a polyester, a polyamide, an ethylene-vinyl acetate copolymer, or a mixed resin thereof as a main component, and wherein the seal member includes
a cylindrical inner layer containing an ethylene resin as a main component, and
an outer layer which is laminated on an outer peripheral side of the inner layer and which contains a polyester, a polyamide, an ethylene-vinyl acetate copolymer, or a mixed resin thereof as a main component.

2 . The electric wire with the terminal according to claim 1 , wherein the seal member is formed of a heat-shrink tube which includes a cylindrical base layer containing an ethylene resin as a main component and an adhesive layer which is laminated on an outer peripheral side of the base layer and which contains a polyester, a polyamide, an ethylene-vinyl acetate copolymer, or a mixed resin thereof as a main component.

3 . A method of manufacturing an electric wire with a terminal, the method comprising:
fitting a heat-shrink tube onto a vicinity of one end portion of an insulated wire including a conductive core wire and an insulating layer covering an outer periphery of the core wire; heating the fitted heat-shrink tube; electrically connecting a metal terminal to the core wire at the end portion of the insulated wire; disposing an inserting portion, which includes a part from the heat-shrink tube covering part of the insulated wire to an electrical connection part of the metal terminal, in a cavity of a mold; and filling the cavity with molten resin composition, wherein the insulating layer contains an olefin resin as a main component, wherein the resin composition contains a polyester, a polyamide, an ethylene-vinyl acetate copolymer, or a mixed resin thereof as a main component, and wherein the heat-shrink tube includes
a cylindrical base layer containing an ethylene resin as a main component, and
an adhesive layer which is laminated on an outer peripheral side of the base layer and which contains a polyester, a polyamide, an ethylene-vinyl acetate copolymer, or a mixed resin thereof as a main component.

Assignees

• Sumitomo Electric Industries
• Autonetworks Technologies Ltd
• Sumitomo Wiring Systems

Inventors

• Tanaka Shigeyuki
• Fujita Taro
• Nishikawa Shinya
• Nakashima Kazuo
• Nakamura Tetsuya

Classifications

• H01B3/441 Primary

  from alkenes · CPC title

• H01B7/285

  by completely or partially filling interstices in the cable · CPC title

• H01R4/72 Primary

  using a heat shrinking insulating sleeve · CPC title

• H01R43/005

  for making dustproof, splashproof, drip-proof, waterproof, or flameproof connection, coupling, or casing · CPC title

• H01B7/02

  Disposition of insulation · CPC title