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Composition of wear-resistant polyethylene pipe for underground coal mine, and preparation method of composition

A technology for polyethylene pipes and high-density polyethylene, applied in pipes, rigid pipes, mechanical equipment, etc., can solve the problems of pipe mechanical properties decline, easy to generate static electricity, pipe scratches, etc., and achieve small processing performance and physical and chemical properties, Enhanced flame retardant effect, good thermal stability effect

Inactive Publication Date: 2013-01-02
TIANJIN JUNXING PIPE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional underground mining pipes mainly include steel pipes, cast iron pipes and glass steel pipes. However, when these pipes are used underground, sparks are easily generated due to collisions, resulting in gas explosions, and the transportation and installation of pipes are also extremely inconvenient. Therefore, replacing metal pipes with plastic pipes has gradually attracted attention.
[0003] Polyethylene pipe itself has the advantages of low cost, light weight, easy installation and strong corrosion resistance, but it also has the disadvantages of being flammable and prone to static electricity. Therefore, a large number of domestic researchers have added various additives Methods to modify polyethylene, such as adding compounds containing bromine and antimony elements to improve its flame retardancy, using conductive carbon black or antistatic agents to increase the conductivity of the inner and outer walls of the pipe, etc.
[0004] At the same time, when the plastic pipe is laid and installed underground in the coal mine, due to dragging, friction with the ground and walls, or friction and scratching of the inner wall by mixed sand and stones during drainage, gas pumping, etc., it is very easy to make the pipe Scratches and breakages will lead to a decline in the mechanical properties of the pipe, or cause the flame-retardant and antistatic functional layers of the inner and outer walls of the pipe to fall off, which will seriously affect the performance of the plastic pipe and form a safety hazard in production. Has been neglected in research and production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] ①The weight composition is: super wear-resistant carbon black 2%, superconducting carbon black 20%, decabromodiphenyl ether 20%, antimony trioxide 10%, POE 10%, antioxidant 1%, processing aid 2%, HDPE 35%.

[0034] The superconducting carbon black needs to undergo the following surface treatment: the superconducting carbon black is stirred in a high-speed mixer for 10 minutes under the conditions of 100°C, 100RPM, and 3% surface treatment agent.

[0035] ② After uniformly mixing the mixture in a high-speed mixer, put it into a twin-screw extrusion granulator, and control the extrusion granulation temperature between 170 and 210°C.

[0036] ③Put the pellets into the extrusion molding machine, set the temperature of the barrel area to 180-190°C, the temperature of the mold area to 180-195°C, and the vacuum degree to -0.03--0.05MPa. After cooling and shaping, cut it into a specified length, that is, finished product.

[0037] The polyethylene pipe produced by the above c...

Embodiment 2

[0039] ①The weight composition is: 2% super wear-resistant carbon black, 13% superconducting carbon black, 10% decabromodiphenyl ether, 5% antimony trioxide, 10% POE, 1% antioxidant, 2% processing aid, HDPE 57%.

[0040] The superconducting carbon black needs to undergo the following surface treatment: the superconducting carbon black is stirred in a high-speed mixer for 10 minutes at 150° C., with a rotation speed of 150 RPM and a surface treatment agent dosage of 5%.

[0041] ② After uniformly mixing the mixture in a high-speed mixer, put it into a twin-screw extrusion granulator, and control the extrusion granulation temperature between 170 and 210°C.

[0042] ③Put the pellets into the extrusion molding machine, set the temperature in the barrel area to 185-200°C, the temperature in the mold area to 185-195°C, and the vacuum degree to -0.04--0.06MPa. After cooling and shaping, cut it into a specified length, that is, finished product.

[0043] The polyethylene pipe produc...

Embodiment 3

[0045] ①The weight composition is: super wear-resistant carbon black 5%, superconducting carbon black 15%, decabromodiphenyl ether 20%, antimony trioxide 10%, POE 5%, antioxidant 1%, processing aid 4%, HDPE 40%.

[0046] The superconducting carbon black needs to undergo the following surface treatment: the superconducting carbon black is stirred in a high-speed mixer for 10 minutes at 200° C., with a rotation speed of 100 RPM and a surface treatment agent dosage of 6%.

[0047] ② After uniformly mixing the mixture in a high-speed mixer, put it into a twin-screw extrusion granulator, and control the extrusion granulation temperature between 170 and 210°C.

[0048] ③Put the pellets into the extrusion molding machine, set the temperature of the barrel area to 190-200°C, the temperature of the mold area to 185-200°C, and the vacuum degree to -0.05--0.07MPa. After cooling and shaping, cut it to a specified length, that is, finished product.

[0049] The polyethylene pipe produced...

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PUM

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Abstract

The invention relates to a wear-resistant polyethylene pipe for an underground coal mine, belonging to one of polyethylene modified materials. The wear-resistant polyethylene pipe comprises the raw materials by weight percent: 2-5% of super wear-resistant carbon black, 10-20% of superconducting carbon black, 10-20% of decabromodiphenyl ether, 5-10% of antimony trioxide, 5-10% of POE, 0.5-1% of antioxidant, 2-4% of processing agent and the balance of high density polyethylene. The super wear-resistant carbon black has the required particle size of 11-15nm, the iodine absorption value of 145-152g / kg and the dibutyl phthalate (DBP) absorption value of 113-120cm<3> / 100g. The wear-resistant polyethylene pipe has the advantages that excellent flame retardant and antistatic performance is excellent, and wear resistance is high, so that the flame retardant and the antistatic performance and the mechanical property of the pipe are guaranteed not to be reduced due to dragging and friction in the processes of installation and use, and the safety factor of underground coal mine operation can be improved.

Description

technical field [0001] The invention relates to a composition and a preparation method of a polyethylene pipe material for coal mine underground with super wear resistance, and the formula can also be used to produce pipelines for transporting inflammable and explosive gases and plastic products for electrical appliances. Background technique [0002] my country has abundant coal resources, which account for 60% of the total energy, and the annual output is about 3 billion tons or more. In order to ensure the safety of underground production operations, underground ventilation must be ensured when mining coal mines to avoid gas, Vicious accidents such as explosions caused by coal dust, etc. Traditional underground mining pipes mainly include steel pipes, cast iron pipes and glass steel pipes. However, when these pipes are used underground, sparks are easily generated due to collisions, resulting in gas explosions, and the transportation and installation of pipes are also extr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08K13/06C08K9/04C08K3/04C08K5/06C08K3/22F16L9/12
Inventor 夏成文韩英民吴晓芬李晨于东明
Owner TIANJIN JUNXING PIPE GRP CO LTD
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