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Thermal anti-oxidation radiation resistance polyolefine thermal contraction material and preparation method thereof

A polyolefin thermal and heat-resistant aging technology, applied in the coating and other directions, can solve the problems of short service life of heat shrinkable materials, intolerant of γ-ray radiation, etc., and achieve the effect of improving performance and reducing degradation.

Active Publication Date: 2009-10-28
CHANGYUAN ELECTRONICS DONGGUAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the short service life of the existing heat-shrinkable materials and the problem of not being resistant to gamma ray radiation, and to provide a heat-resistant material with a service life of up to 40 years at 90°C and outstanding radiation resistance. Aged radiation-resistant polyolefin heat-shrinkable material, which can be used in occasions that require high material service life and radiation resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Take 100 parts of linear low density polyethylene, 30 parts of ethylene copolymer (ethylene-vinyl acetate copolymer), 20 parts of polyolefin elastomer (EPDM rubber), cross-linking sensitizer (trihydroxymethylpropane triacrylic acid) ) 1 part, composite antioxidant (the ratio of antioxidant 300 and antioxidant 1010 is 4:1) 3 parts, light stabilizer (light stabilizer 622) 1 part, halogen-containing flame retardant (decabromobiphenyl Ether) 20 parts, antimony trioxide 10 parts, the above materials were kneaded repeatedly at 150°C until they were plasticized uniformly. Put the material on the mill and pass twice, crush the material, extrude and granulate with a twin-screw extruder at a temperature range of 100-150°C. Feed the pellets into the screw extruder to extrude the pipe, the pipe is cross-linked under the electron beam irradiation dose of 120kGy, and the inner diameter of the pipe is reduced to 3 times of the original size by using the air pressure expander, and the ...

Embodiment 2

[0041] Take 150 parts of linear low-density polyethylene, 50 parts of ethylene copolymer (ethylene-vinyl acetate copolymer), 40 parts of polyolefin elastomer (two-dimensional ethylene-propylene rubber), and 1 cross-linking sensitizer (tripropylene glycol acrylic acid) 10 parts, 10 parts of composite antioxidant (antioxidant 330, the ratio of antioxidant DLDP is 4:1), 2 parts of light stabilizer (light stabilizer 944), halogen-containing flame retardant (decabromodiphenylethane ) 40 parts, and antimony trioxide 15 parts, the above materials were kneaded repeatedly at 150°C until they were plasticized uniformly. Put the material on the mill and pass twice, crush the material, extrude and granulate with a twin-screw extruder at a temperature range of 100-150°C. Feed the pellets into the screw extruder to extrude the pipe. The pipe is cross-linked under electron beam irradiation with a radiation dose of 130kGy. The inner diameter of the pipe is reduced to 3 times the original size...

Embodiment 3

[0050] Take 130 parts of linear low density polyethylene, 80 parts of ethylene copolymer (ethylene-vinyl acetate copolymer), 30 parts of polyolefin elastomer (ethylene-1-octene copolymer), cross-linking sensitizer (trihydroxypropane three methacrylate) 2 parts, composite antioxidant (the ratio of antioxidant 736 to antioxidant DLDP is 4:1) 6 parts, light stabilizer (light stabilizer 622) 4 parts, halogen-containing flame retardant ( Tetrabromoethane) 60 parts, antimony trioxide 20 parts, the above materials were kneaded repeatedly at 150° C. until plasticized uniformly. Put the material on the mill and pass twice, crush the material, extrude and granulate with a twin-screw extruder at a temperature range of 100-150°C. Feed the pellets into the screw extruder to extrude the pipe. The pipe is cross-linked under electron beam irradiation with a radiation dose of 140kGy. The inner diameter of the pipe is reduced to 3 times the original size by using a pneumatic expander, and the s...

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PUM

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Abstract

A thermal anti-oxidation radiation resistance polyolefine thermal contraction material, comprising the following components by weight part: linear low density polyethylene 100-150 part, ethylene copolymer 30-80 part, polyolefine elastomer 20-40 part, cross-link sensibilizer 1-3 part, composite antioxidant 1-10 part, light stabilizer 1-5 part, halogen-containing fire retardant 20-60 part and antimony trioxide 10-30 part. The material is not only used in the nuclear island of the nuclear power station, but also widely used in the fields with higher material performance requirement such as navigation, shipping, nuclear submarine or the like.

Description

technical field [0001] The present invention relates to a heat-shrinkable material, in particular to a cross-linked polyolefin heat-shrinkable material resistant to heat aging and gamma rays. Nuclear submarines and other occasions that require relatively high material performance. Background technique [0002] Cross-linked heat-shrinkable tubing has the characteristics of temperature resistance, solvent resistance, and heat shrinkage. Waterproof sealing, strengthening identification and other functions. Its scope of use ranges from power cables and metal pipes to various wiring harnesses in electronic products. [0003] Through a certain method, the linear molecular structure of polyolefin materials can be transformed into a three-dimensional network structure, and cross-linking occurs. Big improvement. When the cross-linked polymer material is heated above a certain temperature, it becomes an elastic body, expands or stretches under the action of an external force and c...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08K13/02C08J3/28B29B9/06B29C47/00B29C45/00
Inventor 尹沾松赵成刚唐国翌鲁尔兵
Owner CHANGYUAN ELECTRONICS DONGGUAN
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