A preparation method of tensile, compressive and high temperature resistant modified polypropylene power pipe

Abstract

The invention discloses a preparation method of a tensile compressive high temperature resistant modified polypropylene power pipe. The pipe comprises 100 weight parts of modified polypropylene, 0.5-15 weight parts of tackifier, 0.1-15 weight parts of nano material, 0.1-15 weight parts of liquid crystal material, 0.5-15 weight parts of shock resistant modifier, 0.1-15 weight parts of nucleating agent, 0-30 weight parts of filling masterbatch, 0.1-5 weight parts of color masterbatch, 0.5-30 weight parts of engineering plastic, 0.5-15 weight parts of compatibilizer, 0.05-5 weight parts of antioxidant, and 0.05-5 weight parts of light stablilizer, and is prepared by carrying out mixing granulation on the raw materials and then conducting extrusion molding through a mold. According to the invention, compared with existing MPP pipe, the bending strength of the produced MPP pipe disclosed herein is raised by 30-50%, the bending elastic modulus is raised by 25-60%, the welding tensile strength reaches 26-33 MPa, 70 DEG C ring hot compression force is raised by 30-50%, the photooxidation aging resistant time is prolonged by 5-15 years, the vicat softening point is raised by 5-20 DEG C, the shock strength and corrosion resistance are good, thus the produced MPP pipe disclosed herein can meet the requirements for high standard quality electric power engineering, and the engineering cost is reduced.

Description

technical field [0001] The invention relates to a plastic pipe, in particular to a preparation method of a tensile, compressive and high temperature resistant modified polypropylene power pipe. Background technique [0002] At present, the excavation and non-excavation sheathing pipes used on high-voltage cables are mainly modified polypropylene (abbreviated as MPP in the industry) pipes. And the modified polypropylene pipe material of prior art production, flexural strength is 36-38MPa, and flexural elastic modulus is 1000-1500MPa, and body tensile strength is 24-26MPa, and welding tensile strength is 22.5-24MPa, if meet quicksand or In complex projects, the pipe is easily broken at the welding joint; the thermal compression force of the ring piece (section) at a high temperature of 70°C is low. Large size and high cost; the anti-discoloration and anti-aging performance of the pipe is poor, which affects the service life, and it is difficult to meet the requirements of hig...

AI Technical Summary

Problems solved by technology

And the modified polypropylene pipe material of prior art production, flexural strength is 36-38MPa, and flexural elastic modulus is 1000-1500MPa, and body tensile strength is 24-26MPa, and welding tensile strength is 22.5-24MPa, if meet quicksand or In complex projects, the pipe is easily broken at the welding joint; the thermal compression force of the ring piece (section) at a high temperature of 70°C is low. Large size and high cost; the anti-discoloration and anti-aging performance of the pipe is poor, which affects the service life, and it is difficult to meet the requirements of high-standard quality power engineering