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

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...

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