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A preparation method of recyclable insulating material for high-voltage direct current cables

An insulating material, high-voltage direct current technology, applied in the direction of organic insulators, plastic/resin/wax insulators, etc., can solve the problems of brittleness, difficulty in cable transportation and installation, poor mechanical properties of polypropylene, etc., and achieve good mechanical properties , good mechanical properties, good compatibility effect

Active Publication Date: 2017-01-04
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with polyethylene, polypropylene has a higher working temperature and insulation strength, but the mechanical properties of polypropylene at room temperature are not good, and it is very easy to be brittle, which brings great difficulties to the transportation and installation of cables

Method used

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  • A preparation method of recyclable insulating material for high-voltage direct current cables

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Effect test

preparation example Construction

[0010] The preparation method of the recyclable insulating material for the high-voltage DC cable proposed by the present invention comprises the following steps:

[0011] (1) Add 100 parts of polypropylene resin and 25 to 40 parts of polyolefin elastomer into an internal mixer, and knead at 180 to 200°C for 5 to 10 minutes to obtain a kneaded product, wherein the polypropylene resin It is isotactic polypropylene, and the density of isotactic polypropylene is 0.90~0.94g / cm 3 , the melt flow rate is 1.7~3.1g / 10min, isotacticity>97%, the described polyolefin elastomer is ethylene-1-octene copolymer, and the density of ethylene-1-octene copolymer is 0.85~ 0.88g / cm 3 , the melt flow rate is 0.4-0.6g / 10min, and the octene content is 20-30%;

[0012] (2) Add 0.5 to 1 part of antioxidant, 2 to 5 parts of flame retardant and 0.5 to 1 part of processing aid to the kneaded product in step (1), knead for 5 to 10 minutes, and the kneading temperature is 180 ~200°C to obtain recyclable ...

Embodiment 1

[0019] Add 45 grams of isotactic polypropylene F401 and 15 grams of ethylene-1-octene copolymer 8150 into the internal mixer, knead at 190°C for 6 minutes at a speed of 60r / min, and then add 0.3 grams of anti Oxygen 1010, 0.3 gram processing aid stearic acid and 1.5 gram flame retardant aluminum hydroxide, kneaded for 5 minutes again, the kneading temperature is 190 DEG C, and the rotating speed is 60r / min, obtains a kind of for HVDC cable Recyclable insulating materials, their properties are shown in Table 1.

[0020] Table 1 Performance parameters

[0021]

[0022] As can be seen from Table 1, the elongation at break of a recyclable insulating material used for high-voltage direct current cables obtained by the above-mentioned implementation examples of the present invention has nearly doubled compared with pure polypropylene, indicating that its mechanical properties have been improved. Great improvement. At the same time, its electrical and thermal properties are basi...

Embodiment 2

[0024] Add 45 grams of isotactic polypropylene F401 and 15 grams of ethylene-1-octene copolymer 8150 into the internal mixer, knead at 190°C for 6 minutes at a speed of 60r / min, and then add 0.3 grams of anti Oxygen 264, 0.3 gram of processing aid stearic acid and 1.5 gram of flame retardant magnesium hydroxide were kneaded for 5 minutes, and the kneading temperature was 190° C., and the rotating speed was 60 r / min, so as to obtain a high-voltage direct current cable Recyclable insulation.

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Abstract

The invention relates to a preparation method of a recyclable insulating material used for high-voltage direct current cables, and belongs to the technical field of electric power equipment. The material is prepared by melt blending using polypropylene and polyolefin elastomers, antioxidants, processing aids and flame retardants. The insulating material prepared by the method has the characteristics of being recyclable and reusable, can effectively protect the environment and save energy, and is an environment-friendly cable insulating material. The insulating material prepared by the method can effectively improve the mechanical performance of the polypropylene material without reducing its electrical performance and thermal performance. The insulating material prepared by the method can withstand the electric field and high working temperature, significantly improve the withstand temperature and electric field strength of the insulating material, and can be effectively applied in high-voltage direct current cables.

Description

technical field [0001] The invention relates to a preparation method of a recyclable insulating material used for high-voltage direct current cables, and belongs to the technical field of electric power equipment. Background technique [0002] Compared with AC transmission technology, DC transmission technology has many advantages. It can save a lot of land resources, has no system security problems, and has no risk of large-scale cascading failures of AC systems. Therefore, DC transmission technology will be widely used in long-distance, large-capacity, and distributed energy transmission, which is also an effective way to reduce the environmental impact of the future power grid and improve the reliability of the power grid. Plastic power cables are widely used in power transmission and distribution projects due to their low price, convenient processing, and good dielectric and mechanical properties. [0003] The cable insulation materials currently in use generally use po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/08C08K3/38C08K3/22H01B3/44
Inventor 何金良胡军周垚郭宝华党斌曾嵘余占清
Owner TSINGHUA UNIV
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