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Method for waterproofing connection part of covered wire

A technology for covering wires and waterproofing, applied in the parts, connections, and connection end caps of connecting devices, etc., can solve the problems of worry about waterproofness, low fluidity of hot melt adhesives, and difficulty in filling, etc., and achieve the performance price. Excellent, low cost, reliable waterproofing effect

Inactive Publication Date: 2007-02-14
YAZAKI CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sealing method of the electric wire connection part is to fill the gap with a hot melt adhesive that melts the electric wire connection part, then solidifies, and the electric wire connection part is sealed, but although it is in a molten state, the fluidity of the hot melt adhesive is low, Therefore, it is not easy to fill the inner gap between the wires, and the part where the covering part has fallen off easily allows water to intrude, but there is still the problem of water resistance.

Method used

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  • Method for waterproofing connection part of covered wire
  • Method for waterproofing connection part of covered wire
  • Method for waterproofing connection part of covered wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0092] Hereinafter, examples are given and the present invention will be described in more detail. In addition, the performance evaluation in each Example and a comparative example was performed by the following method.

[0093]

[0094] Made of soft vinyl chloride resin, thickness: 1mm

[0095]

[0096] An electric wire assembly formed by crimping the core wires at one end of ten covered electric wires

[0097]

[0098] Curable sealing materials having the compositions shown in Table 1 and Table 2 were prepared, and respective characteristics were evaluated as follows. In addition, for comparison, the curable sealing material of the composition shown in Table 3 was also examined similarly.

[0099] [viscosity]

[0100] The viscosity at 25° C. was measured using an E-type viscometer.

[0101] [Coagulation time (set time)]

[0102] According to JIS K6861, a copper test piece was used, and the time until the predetermined adhesive strength was reached was defined as t...

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PUM

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Abstract

The present invention provides a method for waterproofing connection parts of covered wires which enables to surely make an electrically connected connection part of a covered wire waterproof by a simple and quick process at low cost. A method for waterproofing connection parts of covered wires is that a curing sealing material is injected into a protective cap for protecting a connection part of a covered wire, then the connection part and a covered portion near the connection part of the covered wire are put in the sealing material, and then the sealing material is cured. The sealing material is a photocuring cyanoacrylate resin composition which has a viscosity of not more than 200 mPa.s at 25 DEG in the uncured state and a tensile elongation at break of not less than 20% after curing. The sealing material is cured by irradiation of an electromagnetic wave having a wavelength capable of curing the sealing material.

Description

technical field [0001] The present invention relates to a method of waterproofing a connection portion of a covered electric wire, and more particularly to a method of waterproofing a connection portion of a covered electric wire suitable for an automobile wire harness. Background technique [0002] In harnesses throughout the body of an automobile, many wire connection parts are provided for branching and connecting covered wires to each other. However, the connection processing parts of such electrically connected wire ends need to be reliably insulated from the outside and waterproof. Therefore, various wire connection methods have been proposed so far. [0003] For example, if according to the mutual connection method of the electric wires disclosed in the Publication No. 63-157163, such as Figure 4 As shown, after connecting the core wires of the wire A2 and the wire A3 of the wire harness A1 to form the connection part A4, the covering of the wires A2 and A3 is lamina...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01R4/22H01R13/52
CPCH01R4/22H01R13/5216
Inventor 高桥伸大桥吉春岩崎谦治
Owner YAZAKI CORP
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