Stranded wire and method of manufacture therefor

A technology of twisted wire and manufacturing method, applied in the direction of cable/conductor manufacturing, cable with double twist/quad twist, circuit, etc., can solve the problem of insulator being easily crushed and so on

Active Publication Date: 2020-12-01
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the existing manufacturing method of stranded wires, there is a problem that the shorter the pitch length of the stranded wire, the easier it is for the insulator to be crushed

Method used

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  • Stranded wire and method of manufacture therefor
  • Stranded wire and method of manufacture therefor
  • Stranded wire and method of manufacture therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0150] Set the covered wire (outer diameter 1.0mm, copper wire diameter 0.510mm, insulator thickness 0.245mm) in a constant temperature bath (manufactured by espec company, model: sh-241) set at 0 ℃, and let it stand until the wire temperature reaches the atmosphere temperature of the constant temperature bath (at least 10 minutes). The covered wire has copper wire and TFE / HFP / ppve copolymer a formed around the copper wire by melt extrusion molding (TFE / HFP / ppve (mass ratio): 87.5 / 11.5 / 1.0, melting point: 257 ℃ MFR: 36.3g / 10min, elastic modulus: 460Mpa, relative dielectric constant at 6GHz（ ε r) Dielectric loss tangent at: 2.05, 6GHz: 3.3 × ten -4 ）An insulator.

[0151] Using a twisting machine (manufactured by Tokyo ideal company, model: tw-2n), twist the cooled two coated wires to the pitch length recorded in Table 1 at about 500tpm. Here, the pitch length represents the length until a line is rotated once in the fully twisted part.

[0152] For the obtained twisted...

Embodiment 2

[0170]The set temperature of the thermostatic bath was changed to - 40 ℃. In addition, the twisted pair was made in the same way as in embodiment 1. The obtained twisted pair is evaluated in the same manner as in embodiment 1. The results are shown in Table 1.

Embodiment 3

[0172] A coated wire (1.0mm outer diameter, 0.510mm diameter of copper wire and 0.245mm thickness of insulator) is used, which has copper wire and TFE / HFP / ppve copolymer B formed around the copper wire by melt extrusion (TFE / HFP / ppve (mass ratio): 87.6 / 11.5 / 0.9, melting point: 257 ℃, MFR: 35.7g / 10min, elastic modulus: 480mpa, relative dielectric constant at 6GHz（ ε r) Dielectric loss tangent at: 2.05, 6GHz: 3.3 × ten -4 ）In addition, the twisted pair is made in the same way as in embodiment 1. The obtained twisted pair is evaluated in the same manner as in embodiment 1. The results are shown in Table 1.

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Abstract

The present invention provides a stranded wire made by twisting a plurality of covered wires including a conductor and insulation that covers the periphery of the conductor; the stranded wire satisfies the following inequality expression (1): y < A X x / (z / 500) + B (1) where x represents the pitch length (mm) of the stranded wire, y represents the compression rate (%) of the insulation, z represents the elastic modulus (MPa) of the insulation, A represents a constant A = -1, and B represents a constant B = 0.155.

Description

technical field [0001] The invention relates to a stranded wire and a manufacturing method thereof. Background technology [0002] For a long time, stranded wires that are difficult to be affected by noise have been used as communication cables. [0003] For example, patent document 1 proposes a pair of conductors, which are a pair of conductors with Polymer Insulators respectively. The outer surface of the polymer insulator on each conductor includes peaks and valleys extending alternately in the length direction along the outer surface. The pair of conductors with the polymer insulator on the conductor are twisted to form a twisted pair, At least one peak of the outer surface of the polymer insulator of one of the pair of conductors is engaged with one valley of the outer surface of the polymer insulator of the other of the pair of conductors, which can provide improved impedance efficiency compared with the polymer insulator with the same weight but uniform thickness. [0004]...

Claims

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Application Information

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IPC IPC(8): H01B11/02H01B7/02H01B11/12H01B13/02
CPCH01B13/14H01B7/02H01B13/0207H01B7/0275H01B13/0003H01B13/0036
Inventor 山﨑景子井坂忠晴近藤昌宏
Owner DAIKIN IND LTD
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