1E-level K1-type shrinkable tube used in nuclear power station and preparation method thereof

A technology for nuclear power plants and heat-shrinkable tubes, which is applied in nuclear power generation, nuclear engineering, and climate sustainability. It can solve the problems that heat-shrinkable tubes cannot meet the technical requirements of 1E-level K1 heat-shrinkable tubes in nuclear power plants, and achieve strong radiation resistance. Excellent, good flame retardant performance, excellent heat aging resistance effect

Active Publication Date: 2011-08-10
CHANGYUAN ELECTRONICS DONGGUAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is to overcome the problem that the existing heat-shrinkable tubes cannot meet the technical requirements of 1E-class K1 heat-shrinkable tubes for nuclear power plants, and provide a 1E-level K1-type heat-shrinkable tube for nuclear power plants and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0036]Take 30 parts of low-density polyethylene and 10 parts of ethylene-hexene acetate copolymer (that is, 40 parts of basic resin), 60 parts of ethylene-propylene rubber, 20 parts of decabromodiphenyl ethane, and 10 parts of antimony trioxide (that is, by weight). 30 parts of flame retardant), 5 parts of boron nitride (ie 5 parts of anti-radiation agent), 2 parts of 2,2,4-trimethyl-1,2-dihydroquinoline polymer and 2-mercaptobenzimidazole 2 parts (ie 4 parts of antioxidant), 2 parts of zinc stearate (ie 2 parts of lubricant), 3 parts of color masterbatch. The above materials are mixed and granulated by internal mixing, and then extruded into a pipe with a single-screw extruder. The pipe is cross-linked by cobalt 60 or electron accelerator 100KGy radiation, and the cross-linked pipe is expanded by 4 times at a temperature of 120°C. , the 1E grade K1 heat-shrinkable tube for nuclear power plants is obtained, and its performance is as follows:

[0037] Flame retardancy: passed ...

preparation Embodiment 2

[0042] Take 30 parts of low-density polyethylene and 30 parts of ethylene-methyl acrylate copolymer (that is, 60 parts of basic resin), 40 parts of ethylene-propylene rubber, 40 parts of decabromodiphenyl ethane, and 20 parts of antimony trioxide (that is, by weight). 60 parts of flame retardant), 20 parts of boron carbide (ie 20 parts of anti-radiation agent), 6 parts of N,N'-diphenyl-p-phenylenediamine and 6 parts of 2-mercaptobenzimidazole (ie 12 parts of antioxidant) ), 2 parts of calcium stearate, 3 parts of polyethylene wax (ie, 5 parts of lubricant), 8 parts of color masterbatch. The above materials are mixed and granulated by internal mixing, and then extruded into a pipe with a single-screw extruder. The pipe is cross-linked by cobalt 60 or electron accelerator 100KGy radiation, and the cross-linked pipe is expanded by 4 times at a temperature of 120°C. , the 1E grade K1 heat-shrinkable tube for nuclear power plants is obtained, and its performance is as follows:

[...

preparation Embodiment 3

[0048] Take 20 parts of low density polyethylene and 30 parts of ethylene-ethyl acrylate copolymer (that is, 50 parts of basic resin), 50 parts of ethylene-propylene rubber, 30 parts of decabromodiphenyl ethane, and 15 parts of antimony trioxide (that is, flame retardant) by weight 45 parts of the agent), 12.5 parts of boron nitride (ie 12.5 parts of anti-radiation agent), 4 parts of p-(p-toluenesulfonamido)-diphenylamine and 4 parts of 2-mercaptobenzimidazole (ie 8 parts of antioxidant) , 1.5 parts of stearic acid, 2 parts of polyethylene wax (ie, 3.5 parts of lubricant), 5.5 parts of color masterbatch. The above materials are mixed and granulated by internal mixing, and then extruded into a pipe with a single-screw extruder. The pipe is cross-linked by cobalt 60 or electron accelerator 100KGy radiation, and the cross-linked pipe is expanded by 4 times at a temperature of 120°C. , the 1E grade K1 heat-shrinkable tube for nuclear power plants is obtained, and its performance i...

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Abstract

The invention relates to a 1E-level K1-type shrinkable tube used in a nuclear power station, which comprises the following components by weight: 40 to 60 parts of base resin, 40 to 60 parts of ethylene propylene rubber, 30 to 60 parts of flame retardant, 5 to 20 parts of antiradiation agent, 4 to 12 parts of antioxidizer, 2 to 5 parts of lubricant, and 3 to 8 parts of color masterbatch. The preparationmethod of the 1E-level K1-type shrinkable tube used in the nuclear power station comprises the following steps of: taking all the components by weight, carrying out mixed granulation by banburying ormixed granulation by a parallel double-screw extruder, then using a single-screw extruder for extrusion to form the tube, and carrying out radiation cross linking of cobalt 60 or electron accelerator50-180KGy to the tube, wherein the tube after the radiation cross linking expands by 2 to 6 times at the temperature of 90 to 150 DEG C. The shrinkable tube reaches and far exceeds the performance requirement of the 1E-level K1-type shrinkable tube used in the nuclear power station. The 1E-level K1-type shrinkable tube used in the nuclear power station has good flame retardant properties, can pass V W-1 combustion test; has excellent heat-proof aging property, with the tensile strength and elongation at break of the product far stronger than the performance requirement; and outstanding intense radiation-resistant function, and can pass AC withstand voltage test.

Description

technical field [0001] The invention relates to a heat-shrinkable tube and a preparation method thereof, in particular to a heat-shrinkable tube that can be used in nuclear power plants and a preparation method thereof. Background technique [0002] Nuclear power belongs to clean energy and is a priority industry in my country. By the end of 2008, my country had built three nuclear power bases in Qinshan in Zhejiang, Daya Bay in Guangdong and Tianwan in Jiangsu, with 11 nuclear power units in active service with an installed capacity of 9.1 million kilowatts. According to my country's nuclear power development goals set in the 2007 "Nuclear Power Medium and Long-term Development Plan", by 2020, my country will build 40 million kilowatts of nuclear power, and the proportion of nuclear power will be increased from 2% to 4%. [0003] Level 1E is the safety level for electrical systems and equipment in reactors and nuclear power plants (stations). These systems and equipment a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C13/02C08L23/16C08L23/06C08L23/08C08K13/02C08K3/38B29C69/02B29C61/02B29C71/04
CPCY02E30/40Y02E30/30
Inventor 赵成刚曾志安王哲尹沾松刘军王进于利红
Owner CHANGYUAN ELECTRONICS DONGGUAN
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