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High-current-irradiation-resistant cross-linked low-smoke halogen-free flame-retardant polyolefin insulating material for cotton covered wire

A high-current and wire-laying technology, which is applied in the direction of insulators, organic insulators, plastic/resin/wax insulators, etc., can solve the problems that wires cannot withstand large currents or overload non-combustibility, foaming, yellowing, etc., and achieve easy extrusion Produce granulation, improve compatibility, and prolong the effect of smoking

Inactive Publication Date: 2020-11-20
中广核高新核材科技(苏州)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the above-mentioned conventional formula to produce radiation cross-linked low-smoke halogen-free flame-retardant polyolefin insulation materials, all the wires and wires will smoke, foam, yellow, and crack in a short time, which cannot meet the requirements of the market for wires. New requirements for products with high current resistance or overload and non-combustibility

Method used

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  • High-current-irradiation-resistant cross-linked low-smoke halogen-free flame-retardant polyolefin insulating material for cotton covered wire
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  • High-current-irradiation-resistant cross-linked low-smoke halogen-free flame-retardant polyolefin insulating material for cotton covered wire

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preparation example Construction

[0056] The preparation method of antioxidant masterbatch is as follows:

[0057] After weighing the antioxidant, polyethylene resin, and silicone masterbatch according to the proportion, add them to the high mixer and mix evenly, mix at low speed for 5 minutes, and mix at high speed for 2 minutes. The temperature of the material is controlled at 60-80°C. Then put the uniformly mixed powder into the feeding hopper of the Buss machine, and use the Buss machine to carry out plasticization, extrusion and granulation. Calculated according to the mass percentage, the material ratio of the masterbatch is as follows:

[0058] Antioxidant: 50%

[0059] Polyethylene resin: 49%

[0060] Silicone masterbatch: 1%;

[0061] The antioxidants are tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol, 4,4'-thiobis(6-tert-butyl-3-methylphenol , Three kinds of three [2.4-di-tert-butylphenyl] phosphite, the ratio is 3:1:1.

[0062] Polyethylene resin is powdery linear lo...

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Abstract

The invention relates to a high-current-irradiation-resistant cross-linked low-smoke halogen-free flame-retardant polyolefin insulating material for cotton covered wires. The insulating material comprises the following components in parts by weight: 30-60 parts of an ethylene-vinyl acetate copolymer, 5 to 20 parts of an ethylene-butylene copolymer; 5-10 parts of polyethylene; 3-10 parts of modified polypropylene; 20 to 30 parts of modified polyethylene; 3 to 10 parts of anti-shrinkage master batch; 3-5 parts of antioxidant master batch; 1-5 parts of silicon carbide; 1-5 parts of zinc borate; 1to 1.8 parts of a silane coupling agent; 0.5 to 4 parts of a lubricant; and 1-3 parts of a cross-linking sensitizer. The irradiation cross-linked polyolefin insulating material is resistant to smoking, foaming and yellowing under the action of overload large current and is resistant to cracking, open fire combustion does not occur under the current condition of 100A-300A, the service life of an electric wire can be effectively prolonged when a short circuit occurs, and the risk of circuit fire is reduced.

Description

technical field [0001] The invention relates to an insulating material, in particular to a high-current radiation-resistant cross-linked low-smoke, halogen-free, flame-retardant polyolefin insulating material for wiring. Background technique [0002] With the improvement of safety and environmental protection requirements, low-smoke, halogen-free and flame-retardant polyolefin insulation materials have replaced traditional PVC products in many cable products due to their advantages of low-smoke, halogen-free and environmental protection, and are more popular in civilian cloth wire products. It has been widely used, and the radiation cross-linked low-smoke halogen-free polyolefin insulation material has a higher temperature resistance level than thermoplastic products, so it is favored by cable products. [0003] Conventional low-smoke halogen-free polyolefin insulation products, whether thermoplastic or radiation cross-linked, must meet the standard requirements of GB / T32129...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/06C08L51/06C08L83/04C08K13/02C08K3/22C08K3/34C08K3/38C08K5/5425C08K5/134C08K5/372C08K5/098H01B3/44
CPCC08L23/0853H01B3/441C08L2201/02C08L2201/08C08L2201/22C08L2203/202C08L2205/02C08L2205/025C08L2205/035C08K2003/387C08K2003/2227C08K2003/2224
Inventor 李凤彪邓连天费楚然沈斌沈海龙
Owner 中广核高新核材科技(苏州)有限公司
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