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Method for fabricating ethylene-propylene copolymer-containing twisted-pair cable

A technology of propylene copolymer and twisted pair is applied in the field of preparing twisted pair containing ethylene-propylene copolymer, and can solve the problems of high cost, large dielectric constant of cable core, large transmission attenuation of digital communication cable, etc.

Inactive Publication Date: 2019-05-21
湖北中涂科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention proposes a method for preparing twisted pairs containing ethylene-propylene copolymers to overcome the shortcomings of large transmission attenuation, high cost and large cable core dielectric constant of current digital communication cables

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] A method for preparing a twisted pair containing ethylene-propylene copolymer, comprising the steps of:

[0023] Step A. Use three-layer co-extrusion physical foaming and different color polyethylene base materials to mix and extrude on the surface of a single oxygen-free copper wire to form different color lines;

[0024] Step B. Twisting two wire pairs of different colors into a twisted pair.

[0025] Further, in the step A, the ethylene-propylene copolymer, low-density polyethylene (LDPE), high-density polyolefin and polyethylene are mixed in a mass ratio of 3:2:3:1 by high-pressure nitrogen injection. The body is plasticized to form an insulating layer of a honeycomb structure on the surface of a single oxygen-free copper wire;

[0026] Further, the high-density polyolefin is prepared from the following component ratios:

[0027] 15-25 parts by mass of ethylene-vinyl acetate copolymer;

[0028] 5-7 parts by mass of ethylene-vinyl acetate copolymer grafted maleic ...

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Abstract

The invention discloses a method for fabricating an ethylene-propylene copolymer-containing twisted-pair cable. A honeycomb-structure insulation layer is formed on a surface of a single oxygen-free copper wire by employing a conformance material, three co-extruded physical foamed polyethylene insulation layers are used on a line core structure of a digital communication cable with low cost and lowtransmission attenuation, the average dielectric constant of a line core is reduced by such a structure, the low attenuation requirement of signal transmission is met, the external diameter size of acopper conductor is reduced under the condition that the same transmission performance is achieved, the dosage of an insulation material is saved, so that the production cost of product raw materialsis reduced, and meanwhile, the cost of cable formation production process is reduced.

Description

technical field [0001] The invention relates to a method for preparing twisted wires containing ethylene-propylene copolymer. Background technique [0002] Since the mid-1980s, with the rapid development of data communication and information technology, the rapid development of network technology and the continuous improvement of computer performance, people have higher and higher requirements for the performance of the integrated wiring system. At present, the network transmission rate has changed from The previous 10Mb is increased to 100Mb, and Gigabit LAN technology, the network rate is increasing day by day, which means the increase of the operating frequency, the higher the operating frequency, the greater the signal transmission attenuation. Traditional communication cables use solid polyethylene insulation technology, and the cable core has a large transmission attenuation at high frequencies. In addition, as the cost of raw materials continues to increase, the cost...

Claims

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Application Information

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IPC IPC(8): H01B13/14
Inventor 周梦宏
Owner 湖北中涂科技有限公司