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Low-smoke halogen-free flame-retardation insulation material for class 1E category K1 cables of nuclear power station

A technology for nuclear power plants and insulating materials, which is applied to insulated conductors, insulated cables, rubber insulators, etc., can solve the problems of unqualified insulation performance, flame retardant performance, poor performance of high-dose radiation steam, complex production process, etc., to improve radiation resistance. , The effect of improving the thermal oxidation resistance and simplifying the processing technology

Inactive Publication Date: 2014-08-13
中广核三角洲(江苏)塑化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the structure of the existing insulated wire core is a two-layer structure, the inner layer insulation is cross-linked polyethylene, which is used to provide insulation performance, and the outer layer insulation is a highly flame-retardant polyolefin material, which is used to provide high flame-retardant performance; However, there are the following technical problems: (1) The production process is complicated, and the performance margin is small, often resulting in unqualified insulation performance or flame retardant performance; (2) The ability to withstand large doses of radiation and high temperature, water immersion, and steam poor

Method used

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  • Low-smoke halogen-free flame-retardation insulation material for class 1E category K1 cables of nuclear power station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: A low-smoke, halogen-free, flame-retardant insulating material for 1E-class K1 cables in nuclear power plants, the water-resistant and flame-retardant PVC cable material is composed of the following components by weight:

[0028] 100 parts of EPDM copolymer,

[0029] 12 parts polyimide,

[0030] 48 parts of magnesium hydroxide,

[0031] 20 parts of antimony trioxide,

[0032] 2.5 parts of dicumyl peroxide,

[0033] Zinc oxide 10 parts,

[0034] Calcined pottery clay 50 parts,

[0035] 2.4 parts of 2,2,4-trimethyl-1,2-dihydroquinoline polymer,

[0036] 2.6 parts of 2-mercaptobenzimidazole,

[0037] Vinyl tris(β-methoxyethoxy)silane 1 part,

[0038] 4 parts of PE wax;

[0039] The Mooney viscosity ML(1+4) of the above copolymer is 125°C ≤ 45, and the ethylene content of the copolymer is ≥ 60%;

[0040] The average particle diameter of the polyimide modifier is 10-20 μm, the average particle diameter of the magnesium hydroxide is 0.8-1.5 μm, and the ave...

Embodiment 2

[0048] Example 2: A low-smoke, halogen-free, flame-retardant insulating material for 1E-class K1 cables in nuclear power plants, the water-resistant and flame-retardant PVC cable material is composed of the following components by weight:

[0049] 100 parts of EPDM copolymer,

[0050]10 parts polyimide,

[0051] 43 parts of magnesium hydroxide,

[0052] 23 parts of antimony trioxide,

[0053] 3 parts of dicumyl peroxide,

[0054] Zinc oxide 8 parts,

[0055] Calcined pottery clay 30 parts,

[0056] 2.6 parts of 2,2,4-trimethyl-1,2-dihydroquinoline polymer,

[0057] 2.4 parts of 2-mercaptobenzimidazole,

[0058] Vinyl tris(β-methoxyethoxy)silane 2 parts,

[0059] 2 parts stearic acid;

[0060] The Mooney viscosity ML(1+4) of the above copolymer is 125°C ≤ 45, and the ethylene content of the copolymer is ≥ 60%;

[0061] The average particle diameter of the polyimide modifier is 10-20 μm, the average particle diameter of the magnesium hydroxide is 0.8-1.5 μm, the average...

Embodiment 3

[0067] Embodiment 3: A low-smoke, halogen-free, flame-retardant insulating material for 1E-class K1 cables in nuclear power plants, the water-resistant and flame-retardant PVC cable material is composed of the following components by weight:

[0068] 100 parts of EPDM copolymer,

[0069] 15 parts polyimide,

[0070] 50 parts of magnesium hydroxide,

[0071] 18 parts of antimony trioxide,

[0072] 2.5 parts of dicumyl peroxide,

[0073] 9 parts of zinc oxide,

[0074] Calcined pottery clay 40 parts,

[0075] 2.5 parts of 2,2,4-trimethyl-1,2-dihydroquinoline polymer,

[0076] 2.5 parts of 2-mercaptobenzimidazole,

[0077] Vinyl tris(β-methoxyethoxy)silane 2.5 parts,

[0078] 3 parts stearic acid;

[0079] The Mooney viscosity ML(1+4) of the above copolymer is 125°C ≤ 45, and the ethylene content of the copolymer is ≥ 60%;

[0080] The average particle diameter of the polyimide modifier is 10-20 μm, the average particle diameter of the magnesium hydroxide is 0.8-1.5 μm, ...

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Abstract

The invention discloses a low-smoke halogen-free flame-retardation insulation material for class 1E category K1 cables of a nuclear power station. The material is composed of the following compositions in parts by weight, 100 parts of ethylene-propylene-diene monomer, 5-20 parts of polyimide, 30-60 parts of magnesium hydroxide, 15-30 parts of diantimony trioxide, 2-3.5 parts of dicumyl peroxide, 8-10 parts of zinc oxide, 30-50 parts of calcined potter's clay, 2.4-2.6 parts of poly(1,2-dihydro-2,2,4-trimethyl-quinoline), 2-3 parts of 2-mercaptobenzimidazole, 1-3 parts of vinyltris(beta-methoxyethoxy)silane and 0.5-5 parts of a lubricant. The Mooney viscosity, ML(1+4)125 DEG C, of ethylene-propylene-diene monomer is less than or equal to 45, and the ethylene content of ethylene-propylene-diene monomer is more than or equal to 60%. According to the material disclosed by the invention, the flame retardation property is improved, also the insulation property is improved, and the comprehensive performances such as radiation resistance, heat resistance, high flame retardation property, high insulation property and the like of the material are improved.

Description

technical field [0001] The invention relates to a low-smoke, halogen-free, flame-retardant insulating material, in particular to a low-smoke, halogen-free, flame-retardant insulating material for 1E-level K1 cables in nuclear power plants. Background technique [0002] With the continuous development of my country's economy, nuclear energy, as a complex and efficient energy source, has been highly valued and vigorously developed by the country. The cables used in nuclear power plants, especially the cables used in the containment, according to the third-generation AP1000 nuclear power standard, need to have a normal service life of 60 years in a radiation environment, and withstand large doses of radiation, high temperature, and water immersion in the event of an accident or after an accident. , steam and other harsh conditions can perform safety functions, and its insulated core wire is also required to meet the single vertical burning test of IEC60332-1 and the high insula...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08L79/08C08K13/02C08K3/22C08K3/34C08K5/14C08K5/3447C08K5/5425H01B7/295
CPCC08L23/16C08K2201/003C08L2201/02C08L2201/08C08L2201/22C08L2203/202C08L2205/03H01B3/28H01B7/295
Inventor 单永东
Owner 中广核三角洲(江苏)塑化有限公司
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