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Preparation method of insulation body in radio-frequency coaxial cable

A technology for radio frequency coaxial cables and insulators, applied in the field of coaxial cables, can solve problems such as poor polyethylene cracking and heat aging resistance, reduced performance and application range of radio frequency coaxial cables, insufficient mechanical properties of radio frequency coaxial cables, etc. , to achieve the effect of fine and uniform foaming, good comprehensive mechanical properties and insulation properties, and easy implementation

Inactive Publication Date: 2014-06-25
SUZHOU KEMAO ELECTRONICS MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the current technology, most of the insulators in radio frequency coaxial cables are made of polyethylene material, which has the advantages of good low temperature resistance, acid and alkali corrosion resistance, water absorption resistance and high electrical insulation performance, but polyethylene is resistant to environmental cracking and Poor heat aging resistance
In summary, the RF coaxial cable made of a single material of polyethylene insulator still has some shortcomings in some mechanical properties, which reduces the performance and application range of the RF coaxial cable to a certain extent.

Method used

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  • Preparation method of insulation body in radio-frequency coaxial cable

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Embodiment 1

[0016] The specific preparation process of the insulator in the radio frequency coaxial cable mentioned by the present invention is as follows:

[0017] a) Prepare modified polypropylene resin. Modified polypropylene resin is prepared from polypropylene and high-density polyethylene through a blending process. The mass-to-number ratio of the two mixed is about 100:6; the preparation process is divided into two steps : In the first step, import polypropylene and high-density polyethylene into the rubber mixer for blending modification, the rotation speed of the rubber mixer is about 100rpm, the temperature of the barrel is controlled at about 190°C, and the blending time is about 10 minutes; In the second step, the blend is extruded through a screw extruder, the length-to-diameter ratio of the screw of the extruder is 20:1, and the temperature of the feed port of the extruder is 225°C;

[0018] b) Plasticizing and foaming, the preparation process is as follows: First, add the m...

Embodiment 2

[0022] The specific preparation process of the insulator in the radio frequency coaxial cable mentioned by the present invention is as follows:

[0023] a) Prepare modified polypropylene resin. Modified polypropylene resin is prepared from polypropylene and high-density polyethylene through a blending process. The mass-to-number ratio of the two mixed is about 100:7; the preparation process is divided into two steps : In the first step, import polypropylene and high-density polyethylene into the rubber mixer for blending modification, the rotation speed of the rubber mixer is about 100rpm, the temperature of the barrel is controlled at about 190°C, and the blending time is about 11 minutes; In the second step, the blend is extruded through a screw extruder, the length-to-diameter ratio of the screw of the extruder is 20:1, and the temperature of the feed port of the extruder is 230°C;

[0024] b) Plasticizing and foaming, the preparation process is as follows: First, add the m...

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Abstract

The invention discloses a preparation method of an insulation body in a radio-frequency coaxial cable. The preparation method comprises the following steps: (a) preparing modified polypropylene resin; (b) plasticizing and foaming; (c) extruding and covering; (d) cooling for forming. The preparation method disclosed by the invention is reasonable in process, is easy and convenient to implement and is moderate in cost; the prepared insulation body is sufficient in foaming degree and uniform in fineness and is good in comprehensive mechanical performance and insulation performance in a using process, so that the use performance of the radio-frequency coaxial cable is relatively stable and efficient.

Description

technical field [0001] The invention relates to a method for preparing an insulator in a radio frequency coaxial cable, in particular to a method for preparing an insulator in a radio frequency coaxial cable with high and uniform material foaming degree and comprehensive and stable performance, belonging to the technical field of coaxial cables. Background technique [0002] The name of the RF coaxial cable is related to its structure. A coaxial cable refers to a cable with two concentric conductors, and the conductor and the shielding layer share the same axis. The inner conductor of the radio frequency coaxial cable is a solid metal wire, and the inner insulating material can be made of polyethylene, polypropylene and other materials. Outside the inner insulating material is another layer of ring conductor, that is, the outer conductor, and the outer conductor is mostly made of metal copper wire. , aluminum wire or alloy wire, which is wound on the inner insulating materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/02B29C44/00
CPCB29C48/0012B29C48/15
Inventor 邹黎清
Owner SUZHOU KEMAO ELECTRONICS MATERIALS TECH
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