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A kind of preparation method of anti-crack and high temperature resistant cross-linked polyethylene cable sheath

A cross-linked polyethylene, cable sheath technology, applied in circuits, electrical components, plastic/resin/wax insulators, etc., can solve the problems of commercial PE's unsatisfactory temperature resistance, mechanical properties and solvent corrosion resistance. , to achieve the effect of reducing environmental irritation, bending service life and improving bonding force

Active Publication Date: 2020-09-29
NINGGUO MINGFU CABLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few reports on the application of polymer-modified calcium carbonate in cross-linked polyethylene. The production and sales of polyethylene (PE) are large and the price is low, but the temperature resistance, mechanical properties and solvent corrosion resistance of commercial PE are not good. satisfactory

Method used

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  • A kind of preparation method of anti-crack and high temperature resistant cross-linked polyethylene cable sheath

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method of anti-cracking and high temperature cross-linked polyethylene cable sheath, using 200 parts of cross-linked polyethylene as the main material, melting it in an open rubber mixer at 110°C, adding 45 parts of auxiliary materials to the melted main material Stir and mix for 20 minutes, then add to the vulcanizer and vulcanize at 155°C. Add the vulcanized rubber to the extruder and extrude it to the surface of the cable core to make a cable sheath. The thickness of the sheath is 1.0cm. The formed sheath is softened by heating in an oven at 120°C, and then the modified limestone particles are evenly sprayed on the surface of the sheath, and finally the sheath is squeezed by a pressure roller and cooled.

[0023] The auxiliary materials are made of the following raw materials by weight (Kg): vinyltrimethylsilane 10, diisopropane peroxide 6, dibutyltin dilaurate 2, flame retardant 30, brucite powder 4, carbon black N330 10. Antiaging agent RD 1. Chlorina...

Embodiment 2

[0026] A method for preparing a crack-proof and high-temperature-resistant cross-linked polyethylene cable sheath, using 250 parts of cross-linked polyethylene as the main material, melting it in an open rubber mixer at 116°C, and adding 52 parts of auxiliary materials to the melted main material Stir and mix for 25 minutes, then add to the vulcanizer and vulcanize at 160°C, add the vulcanized rubber to the extruder and extrude it to the surface of the cable core to make a cable sheath. The thickness of the sheath is 1.25cm. The molded sheath is softened by heating in an oven at 135°C, and then the modified limestone particles are evenly sprayed on the surface of the sheath, and finally the sheath is squeezed by a pressure roller and cooled.

[0027] The auxiliary materials are made of the following raw materials by weight (Kg): Vinyltrimethylsilane 12, diisopropane peroxide 8, dibutyltin dilaurate 3.5, flame retardant 38, brucite powder 6, carbon black N330 12. Antiaging agen...

Embodiment 3

[0030]A preparation method of anti-cracking and high temperature cross-linked polyethylene cable sheath, using 300 parts of cross-linked polyethylene as the main material, melting it in an open rubber mixer at 125°C, adding 60 parts of auxiliary materials to the melted main material Stir and mix for 30 minutes, then add to the vulcanizer and vulcanize at 165°C, add the vulcanized rubber to the extruder and extrude it to the surface of the cable core to make a cable sheath. The thickness of the sheath is 1.5cm. The formed sheath is softened by heating in an oven at 150°C, and then the modified limestone particles are evenly sprayed on the surface of the sheath, and finally the sheath is squeezed by a pressure roller and cooled.

[0031] The auxiliary material is made of the following raw materials by weight (Kg): 15 vinyltrimethylsilane, 10 diisopropane peroxide, 5 dibutyltin dilaurate, 45 flame retardant, 8 brucite powder, carbon black N330 15, anti-aging agent RD 2, chlorinat...

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Abstract

The invention discloses a preparation method of a crack-resisting and high-temperature-resisting crosslinked polyethylene cable sheath. The preparation method comprises the following steps: taking crosslinked polyethylene as a main material and melting; adding auxiliary materials into the melted main material; then adding a mixture into a vulcanizing machine for vulcanizing; adding the vulcanizedsizing material into a plastic extruding machine for extruding until the surface layer of a cable core is prepared into a cable sheath and heating a softened and formed sheath; then uniformly sprayingand coating modified limestone particles on the surface of the sheath; finally, extruding the sheath by using a press roll and cooling to obtain the crack-resisting and high-temperature-resisting crosslinked polyethylene cable sheath. By adding a flame retardant and coating the surface layer with extruded modified limestone particles, the crosslinked polyethylene cable sheath layer has a flame-retardant effect; meanwhile, a coupling agent is added into the modified limestone particles, so that a bonding force of the modified limestone particles and the cable sheath is improved, and the surface performance of the cable sheath is improved; on the basis of fire-retardant property, the crack-resisting and high-temperature-resisting crosslinked polyethylene cable sheath has the advantages of resisting wear, resisting bending and prolonging the service life.

Description

technical field [0001] The invention relates to the technical field of modern communication network cables, in particular to a preparation method of a crack-proof and high-temperature resistant cross-linked polyethylene cable sheath. Background technique [0002] In order to make calcium carbonate powder have the required properties, it is first necessary to improve various properties on the basis of ordinary calcium carbonate to make it active calcium carbonate. It includes the improvement of the crystal form, particle size, particle size distribution and surface treatment of calcium carbonate, so as to achieve the dual functions of filling and modification in composite materials. [0003] After crosslinking, polyethylene can improve environmental stress crack resistance, heat resistance, creep resistance, and medium resistance. There are few reports on the application of polymer-modified calcium carbonate in cross-linked polyethylene. The production and sales of polyethyl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L91/06C08L23/16C08K13/02C08K5/5425C08K5/14C08K5/57C08K3/22C08K3/04C08J7/06H01B3/44
CPCC08J7/06C08J2323/06C08J2423/16C08K2003/2224C08L23/06C08L2201/02C08L2203/202C08L2205/03H01B3/441C08L91/06C08L23/16C08K13/02C08K5/5425C08K5/14C08K5/57C08K3/22C08K3/04
Inventor 卢康宁郭睿闫李玲王海峰吴琼
Owner NINGGUO MINGFU CABLE CO LTD