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Insulating material with scorching resistance and preparation method thereof

A technology of insulating materials and performance, applied in the direction of organic insulators, insulators, plastic/resin/wax insulators, etc., can solve the problems of poor scorch resistance of materials, affecting long-term continuous extrusion of rubber materials, etc., to achieve high electrical performance, Stable and reliable anti-scorch performance, cost-saving effect

Inactive Publication Date: 2021-07-09
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the use of anti-scorch agents for insulating materials in the prior art is likely to cause defects in the materials, and if the anti-scorch agents are not used, the anti-scorch properties of the materials will be poor, thereby affecting the adhesive properties. long-term continuous extrusion of materials and other defects, thereby providing an insulating material with anti-scorch performance and its preparation method

Method used

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  • Insulating material with scorching resistance and preparation method thereof
  • Insulating material with scorching resistance and preparation method thereof
  • Insulating material with scorching resistance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment provides an insulating material with anti-scorch properties, the preparation method of which is as follows:

[0044] Take by weighing the following materials in parts by mass: low-density polyethylene LDPE for ultra-clean cable material (molecular weight distribution is 5.6, melt index is 2.1g / min and volume resistivity 2 * 10 17Ω·cm) 100kg, the compound antioxidant is 4,4'-thiobis(6-tert-butyl-3-methylphenol) and antioxidant 168 according to 4:1 weighing 0.4kg, diperoxide Cumene and triallyl isocyanurate (4:1) 1.6kg, plasticizer (dimethyl phthalate) 0.08kg.

[0045] The two antioxidants are pre-mixed by high-speed stirring at 30°C and 150r / min; then the low-density polyethylene, antioxidant and plasticizer are sequentially added to the internal mixer at a speed of 60r / min and a temperature of 120 Melt and knead at ℃ for 40 minutes, after filtering impurities through the melt filtration system (500 mesh filter screen), the obtained material enters the s...

Embodiment 2

[0048] This embodiment provides an insulating material with anti-scorch properties, the preparation method of which is as follows:

[0049] Take by weighing the following materials in parts by mass: low-density polyethylene LDPE for ultra-clean cable material (molecular weight distribution is 5.6, melt index is 2.1g / min and volume resistivity 2 * 10 17 Ω·cm) 100kg, the compound antioxidant is 4,4'-thiobis(6-tert-butyl-3-methylphenol) and antioxidant 168 according to 4:1 weighing 0.8kg, diperoxide Cumene and triallyl isocyanurate 1.8kg (4:1), plasticizer (dimethyl phthalate) 0.08kg.

[0050] The two antioxidants are pre-mixed by high-speed stirring at 80°C and 150r / min; then the low-density polyethylene, compound antioxidant and plasticizer are added to the internal mixer in sequence at a speed of 60r / min Melt and knead for 40 minutes at a temperature of 120°C, filter impurities through a melt filtration system (500 mesh filter) and enter the single-screw melt, extrude from th...

Embodiment 3

[0053] This embodiment provides an insulating material with anti-scorch properties, the preparation method of which is as follows:

[0054] Take by weighing the following materials in parts by mass: low-density polyethylene LDPE for ultra-clean cable material (molecular weight distribution is 5.6, melt index is 2.1g / min and volume resistivity 2 * 10 17 Ω·cm) 100kg, compound antioxidant 4,4'-thiobis(6-tert-butyl-3-methylphenol) and antioxidant 168 weighed 1.5kg according to 4:1, diisoperoxide Propylene and triallyl isocyanurate 1.8kg (4:1), plasticizer (dimethyl phthalate) 0.08kg.

[0055] The two antioxidants are premixed by high-speed stirring at 30°C and 150r / min; then the premix, low-density polyethylene, antioxidant and plasticizer are sequentially added to the internal mixer at a speed of 60r Melting and kneading for 40 minutes at a temperature of 120°C. After filtering impurities through a melt filtration system (500 mesh filter), the resulting material enters the singl...

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Abstract

The invention belongs to the technical field of insulating materials, and particularly relates to an insulating material with scorching resistance and a preparation method thereof. The anti-scorching performance of the material is greatly improved under the condition that an anti-scorching agent does not need to be additionally added through the synergistic cooperation effect of all the components, specifically, the torque of the material is kept at a low level along with the change of temperature and time by selecting a specific compound antioxidant system, meanwhile, the specific compound cross-linking agent is adopted, so that the cross-linking efficiency of the material is higher, the matching performance of the cross-linking agent and the antioxidant is better due to the synergistic effect of the cross-linking agent and the antioxidant, and the electrical performance of the material is kept at a higher level while the scorching resistance is improved; and in addition, due to the addition of a plasticizer, the scorching resistance of the whole system of the material is more stable and reliable.

Description

technical field [0001] The invention belongs to the technical field of insulating materials, and in particular relates to an insulating material with anti-scorch performance and a preparation method thereof. Background technique [0002] The development of cross-linked polyethylene (XLPE) high-voltage extruded insulated cables is later than that of impregnated paper insulated cables and oil-filled cables. Due to its good mechanical properties and insulation properties, convenient installation and maintenance, and simple production process, XLPE is widely used in power systems. [0003] The earliest 110kV cables began in the 1950s, but the early extruded cables had frequent failures. It was not until the 1960s that the space charge problem of the insulation and the aging of the electrical branches were discovered. Since 1972, the extruded insulation of higher voltage levels has exceeded High voltage cables were developed one after another. In 1977, Japan developed an AC 187...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K5/14C08K5/12C08K5/526C08K5/375H01B3/44
CPCC08K5/14C08K5/12C08K5/526C08K5/375H01B3/441C08L2207/066
Inventor 闫轰达张翀李文鹏李维康于凡史晓宁赵维佳乔博李红雷
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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