Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for making carbon dioxide physically foamed RF coaxial cable insulation cable core

A radio frequency coaxial cable and carbon dioxide technology, which is applied in the manufacture of coaxial cables, insulating conductors/cables, etc., can solve the problem of low foaming degree, affecting attenuation and standing wave performance of radio frequency coaxial cables for 3G, and large transmission loss, etc. problem, to achieve the effect of low melting point, reduced attenuation, and reduced cable attenuation performance

Active Publication Date: 2010-02-03
ZHONGTIAN RADIO FREQUENCY CABLE CO LTD
View PDF0 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the insulation layer of physically foamed insulated cables is made of nitrogen foam, which has low foaming degree and large transmission loss, which seriously affects the attenuation and standing wave performance of 3G RF coaxial cables

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for making carbon dioxide physically foamed RF coaxial cable insulation cable core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] Carbon dioxide physical foaming radio frequency coaxial cable insulation core production method is as follows:

[0020] (1) The inner conductor of the insulated core of the carbon dioxide physical foamed 3G radio frequency coaxial cable is an oxygen-free copper tube. After being straightened by a straightening device, it is sized by a drawing die and cleaned by ultrasonic waves before entering the extruder. The water tank is cleaned, and then preheated to 20-30°C by induction, and the inner skin layer is extruded by an extruder. The inner skin layer material is prepared from polyethylene and resin in a weight ratio of 4:1. The resin is an ion bond polymer such as ethylene-(meth)acrylic acid zinc salt, sodium salt, lithium salt, etc. Resin selects commercially available polymethyl methacrylate or polybutyl methacrylate etc. for use.

[0021] (2) Prepare foaming material, which is mixed and melted by high-density polyethylene, low-density polyethylene and nucleating age...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for making a highly foamed carbon dioxide physically foamed RF coaxial cable insulation cable core, in particular to production technology of RF coaxial cable insulation core wire for the third generation data mobile communication 3G. The making method is as follows: (1) the inner conductor of an insulation core wire is subject to strengthening, sizing and ultrasonic cleaning and then is coated with an inner cortex through extrusion by an extruding machine after preheating; (2) foaming material is prepared, and high-density polyethylene, low-density polyethylene and nucleating agent are mixed and melted in to polymer at the high temperature of 180-220 DEG C in the extruding machine; (3) carbon dioxide foaming agent is injected into the melted polymer in the extruding machine by liquid carbon dioxide by virtue of pore gas injection needle high pressure; (4) at high temperature, molten polymer and carbon dioxide foaming agent are mixed uniformly by virtue of revolution of a screw of the extruding machine; (5) the mixture is extruded at the periphery of the inner conductor of the 3G RF coaxial cable by an extruding nose, foamed and made into the foamed insulation cable core; (6) the foamed insulation cable core is made into carbon dioxide physically foamed RF coaxial cable insulation cable core.

Description

technical field [0001] The invention relates to a method for manufacturing high foaming carbon dioxide physically foamed radio frequency coaxial cable insulating cores, in particular to a production process for radio frequency coaxial cable insulating cores used in the third generation data mobile communication 3G. Background technique [0002] With the development of the third-generation data mobile communication 3G and the issuance of 3G licenses, the three major operators have started the establishment of 3G networks nationwide, and 3G has entered the stage of large-scale construction. Widening, the communication rate is getting higher and higher. Therefore, the requirements for 3G radio frequency coaxial cables are getting higher and higher, and they must have low attenuation and standing wave ratio. The insulation of the cable core wire is the main medium for transmitting communication signals, so the insulation processing technology is good. Bad directly affects the p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H01B13/016H01B13/20
Inventor 薛济萍蓝燕锐王强吴付亮许波华
Owner ZHONGTIAN RADIO FREQUENCY CABLE CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com