Polypropylene pipe used for underground coal mine

Abstract

The invention provides a polypropylene pipe used for an underground coal mine. The polypropylene pipe is prepared from the following raw materials in parts by weight: 90 to 100 parts of polypropylene, 1 to 3 parts of barium sulfate crystal whisker, 3 to 12 parts of a fire retardant, 10 to 16 parts of an antistatic agent, 4 to 8 parts of a compatible material, 6 to 12 parts of a shock-resistant modifier, 0.6 to 1.2 parts of an antioxidant and 0.6 to 1.2 parts of a dispersing agent. The antistatic agent is prepared and obtained through the following method: dispersing conductive carbon black and acetylene carbon black into an appropriate amount of water to form dispersion liquid, adding glass fiber for dipping for 10 to 12 hours, and taking out to obtain the antistatic agent through baking. The polypropylene pipe has preferable antistatic property and fire resistance, and can be applied to the underground coal mine.

Description

technical field [0001] The invention belongs to the technical field of mining pipes, and in particular relates to a polypropylene pipe for underground coal mines. Background technique [0002] In the early days, various pipes used in coal mines were mainly steel pipes, glass steel pipes, and PVC pipes. However, because the surface of glass steel pipes is easy to fall off, it is harmful to human health. PVC pipes have poor toughness, are easy to break, have poor safety, and cannot be recycled. In 2005, it was listed as a restricted product by the State Administration of Work Safety, and the steel pipe was gradually eliminated due to its bulkiness, easy corrosion, and easy generation of electric sparks. In recent years, polyethylene (PE) pipes and polyethylene (PE) steel skeleton pipes for coal mines, which have been widely promoted, have solved the above-mentioned deficiencies to a certain extent. However, due to the poor strength of polyethylene pipes (the maximum bearing pr...

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Problems solved by technology

[0002] In the early days, various pipes used in coal mines were mainly steel pipes, glass steel pipes, and PVC pipes. However, because the surface of glass steel pipes is easy to fall off, it is harmful to human health, and PVC pipes have poor toughness, are easy to break, have poor safety, and cannot be recycled. In 2005, it was listed as a restricted product by the State Administration of Work Safety, and the steel pipe was gradually eliminated due to its bulkiness, easy corrosion, and easy generation of electric sparks.

In recent years, polyethylene (PE) pipes and polyethylene (PE) steel skeleton pipes for coal mines, which have been widely promoted, have solved the above-mentioned deficiencies to a certain extent. However, due to the poor strength of polyethylene pipes (the maximum bearing pressure is 1.6MPa), easy to sag, and low heat-resistant temperature. On the one hand, the use cost is high, and on the other hand, it cannot meet the use requirements in occasions with high strength requirements and high heat-resistant temperature requirements. However, although the rigidity of polyethylene (PE) steel skeleton pipe is better, it solves the problem of poor rigidity of polyethylene pipe to a certain extent, but it is easy to delaminate, and the sealing performance of pipe connection is poor. Disadvantages, can not be used well in coal mines

At present, there have been research reports on the application of ultra-high molecular weight polyethylene double-resistance pipes in coal mines, but due to the difficulty in processing ultra-high molecular weight polyethylene and the high price, they cannot be promoted at all.

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