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PE (polyethylene) sheath material and preparation method thereof

A sheathing material, polymethyl methacrylate technology, applied in plastic/resin/wax insulators, organic insulators, etc., can solve the problems of poor resistance to low temperature shock embrittlement, poor ability to withstand external forces, affecting service life, etc. Achieve the effect of improving mechanical properties, ensuring processing performance, and improving cable life

Inactive Publication Date: 2019-06-18
盐城市贝迪塑业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some PE sheath materials can improve the UV protection ability and flame retardancy of the sheath material by adding carbon black or flame retardant components, but the PE sheath material matrix still has long-term use, a large number of molecular breakage and oxidative crosslinking, resulting in The material becomes hard and brittle, which leads to the aging of the sheath. Especially in cold regions, due to the poor resistance to low temperature impact embrittlement, it is prone to cracking when subjected to external forces such as collisions and bending during the laying process, and the ability to withstand external forces is poor, which affects the use. life

Method used

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  • PE (polyethylene) sheath material and preparation method thereof
  • PE (polyethylene) sheath material and preparation method thereof
  • PE (polyethylene) sheath material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method of PE sheath material, wherein, its preparation method is as follows:

[0021] (1) Add alkali-free glass fiber, polymethyl methacrylate, nano-alumina and polyacrylonitrile in a high-speed mixer and stir and mix evenly at 85°C to obtain a filler;

[0022] The alkali-free glass fiber, polymethyl methacrylate, nano-alumina and polyacrylonitrile are mixed according to the mass ratio of 3:3:2:1;

[0023] (2) Take 29 parts of filler and 16 parts of compatibilizer according to the mass fraction, place them in a double-roller mixer, and mix them at 175°C for 25 minutes;

[0024] The compatibilizer is a mixture of maleic anhydride grafted EPDM, titanate coupling agent 201, and glycidyl methacrylate. The maleic anhydride grafted EPDM, titanate coupling agent 201, methyl Glycidyl acrylate is mixed according to the mass ratio of 3:7:2;

[0025] Then add 62 parts of high-density polyethylene and 39 parts of linear low-density polyethylene successively, heat up...

Embodiment 2

[0030] A preparation method of PE sheath material, wherein, its preparation method is as follows:

[0031] (1) Add polymethyl methacrylate and polyacrylonitrile in sequence in a high mixer and stir and mix evenly at 80-95°C to obtain a filler; the polymethyl methacrylate and polyacrylonitrile are mixed according to the mass ratio 6:1;

[0032] (2) Take 35 parts of filler and 18 parts of compatibilizer according to the mass fraction, place them in a double-roller mixer, and knead for 23 minutes at 168 ° C. The compatibilizer is maleic anhydride grafted EPDM, methacrylic acid Glycidyl esters are mixed, and the maleic anhydride grafted EPDM and glycidyl methacrylate are mixed according to the mass ratio of 3:7;

[0033] Then add 59 parts of high-density polyethylene and 40 parts of linear low-density polyethylene successively, heat up to 198°C and mix for 1 hour, then add 5 parts of anti-aging agent and 3 parts of processing aid and mix for 12 minutes to obtain a mixture;

[00...

Embodiment 3

[0038] A preparation method of PE sheath material, wherein, its preparation method is as follows:

[0039] (1) Add alkali-free glass fiber, polymethyl methacrylate, and nano-alumina in a high-speed mixer in sequence, and stir and mix evenly at 80-95°C to obtain fillers;

[0040] The alkali-free glass fiber, polymethyl methacrylate, and nano-alumina are mixed according to the mass ratio of 4:4:5;

[0041] (2) Take 36 parts of filler and 17 parts of compatibilizer according to the mass fraction, place them in a double-roller mixer, and knead at 175 ° C for 28 minutes. The compatibilizer is maleic anhydride grafted EPDM, titanate The coupling agent 201 is mixed, and the maleic anhydride grafted EPDM and the titanate coupling agent 201 are mixed according to the mass ratio of 3:8;

[0042] Then add 52 parts of high-density polyethylene and 33 parts of linear low-density polyethylene successively, heat up to 208°C and knead for 1.8 hours, then add 7 parts of anti-aging agent and 2...

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Abstract

The invention relates to a PE (polyethylene) sheath material and a preparation method thereof. The PE sheath material comprises, by mass, 50-65 parts of high-density polyethylene, 32-44 parts of linear low-density polyethylene, 25-38 parts of a filling material, 14-20 parts of a compatibilizer, 4-8 parts of an anti-aging agent and 2-4 parts of a processing aid; the filling material is made by mixing at least two of alkali-free glass fiber, polymethyl methacrylate, nano alumina and polyacrylonitrile; the compatibilizer is made with one, or a mixture of any, of maleic anhydride grafted EPDM (ethylene propylene diene monomer), titanate coupling agent 201 and glycidyl methacrylate; the anti-aging agent is made with photostabilizer uv-531, anti-aging agent 1024 and antioxidant 1010; the high-density polyethylene, the linear low-density polyethylene and the filling material are modified and blended so that plastic deformation impact energy is absorbed; the sheath material made by extruding under the action of the compatibilizer has good toughness, electrical insulation, tensile strength, low temperature impact embrittling resistance and aging resistance, the laying needs of cables are met, and the life of a cable is extended.

Description

technical field [0001] The invention relates to a PE sheath material and a preparation method thereof, belonging to the technical field of PE materials. Background technique [0002] The sheath material has a protective effect on the cable. As a cable sheath, the polyethylene PE sheath material has excellent dielectric properties and is widely used in the power cable industry for communication, overhead buried and underground laying. With the network infrastructure construction Continuously, new requirements are put forward for cable sheath materials. Some PE sheath materials can improve the UV protection ability and flame retardancy of the sheath material by adding carbon black or flame retardant components, but the PE sheath material matrix still has long-term use, a large number of molecular breakage and oxidative crosslinking, resulting in The material becomes hard and brittle, which leads to the aging of the sheath. Especially in cold regions, due to the poor resistanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L33/12C08L33/20C08L51/04C08K7/14C08K3/22C08K5/10C08K5/134C08K5/20C08K13/04H01B3/44
Inventor 梅林
Owner 盐城市贝迪塑业有限公司
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