Pipe material modified with ultrahigh molecular weight polyethylene and its prepn

Abstract

The present invention is modified ultrahigh molecular weight polyethylene pipe material and its preparation process. The modified ultrahigh molecular weight polyethylene pipe material consists of ultrahigh molecular weight polyethylene 105-165 weight portions, polyethylene wax 3-7 weight portions, graphite 1.2-4 weight portions, hollow glass bead 3-10 weight portions, antistatic agent 1.2-4.5 weight portions and flame retardant 1.8-5.6 weight portions. It has tensile strength higher than 46 MPa. Its preparation process includes the steps of compounding material, mixing, heating, extruding, forming, biaxial tension, cooling to settle and cutting. The modified ultrahigh molecular weight polyethylene pipe material has low cost, high wear resistance, excellent self-lubricating performance, high impact strength, excellent fire resistance, etc.

Description

technical field [0001] The invention relates to an ultra-high molecular weight polyethylene modified material pipe and a preparation method thereof, belonging to the field of polymer processing and application. Background technique [0002] Pipes are required to be used in many engineering fields. For the purpose of reducing costs and facilitating installation and application, a large number of pipes made of engineering plastics have appeared on the market. Among them, PE100 is the most comprehensive performance, and its tensile strength is about It is 25Mpa, and the impact strength is 20KJ / M 2 , the ability to resist environmental stress cracking is about 2000 hours. Because of its outstanding advantages and excellent comprehensive performance, it is widely used in various projects. However, its manufacturing cost is relatively high, and many major engineering technical indicators are still It cannot meet the needs of some high-quality projects, that is, there are still in...

AI Technical Summary

Problems solved by technology

[0002] Pipes are required to be used in many engineering fields. For the purpose of reducing costs and facilitating installation and application, a large number of pipes made of engineering plastics have appeared on the market. Among them, PE100 is the most comprehensive performance, and its tensile strength is about It is 25Mpa, and the impact strength is 20KJ / M 2 , the ability to resist environmental stress cracking is about 2000 hours. Because of its outstanding advantages and excellent comprehensive performance, it is widely used in various projects. However, its manufacturing cost is relatively high, and many major engineering technical indicators are still It cannot meet the needs of some high-quality projects, that is, there are still insufficient safety and reliability; for this reason, some ultra-high molecular weight polyethylene pipes have appeared on the market one after another, although ultra-high molecular weight polyethylene materials have ideal material comprehensive properties. , wear resistance, low temperature resistance, corrosion resistance, self-lubrication, and impact resistance have relatively high values ​​in plastic materials. However, due to the low surface hardness of ultra-high molecular weight polyethylene, the mechanical strength is not high, and the heat distortion temperature is relatively high. Low, poor high temperature resistance, high viscosity, poor fluidity, so it is difficult to process, and compared with PE100, the comprehensive performance of ultra-high molecular weight polyethylene pipes is slightly higher than that of PE100, which is not very Obvious performance improvement. In order to make up for these shortcomings, it is urgent to modify the materials used in the pipes to adapt to the changing market demand.