HDPE pipe plastic modification method

Abstract

The invention relates to the technical field of HDPE pipes, and discloses an HDPE pipe plastic modification method which comprises the following steps: preparing 10-20 parts of graphite, 60-80 parts of high-density polyethylene, 5-7 parts of alumina powder and 10-20 parts of POE plastic, crushing the 10-20 parts of graphite into blocks, feeding the blocks into a crusher for crushing, feeding the graphite powder into a jet mill to obtain graphite micro powder, uniformly mixing the graphite micro powder, 60-80 parts of the high-density polyethylene and 5-7 parts of the alumina powder, heating the mixture to 250 DEG C for melting, dispersing at a high speed for 15 minutes, spreading high-temperature molten liquid, keeping ultrasonic dispersion during spreading, and naturally cooling to obtain a mixture 1. In the method, the graphite powder is firstly uniformly dispersed and then melted and extruded, so that compared with a manner of adding graphite powder during melting and then performing extrusion, the method has advantages that the graphite powder is more uniformly dispersed and has no time to gather or precipitate, and a prepared pipe is more excellent in performance and better in heat-conducting property.

Description

technical field [0001] The invention relates to the technical field of HDPE pipes, in particular to a method for plastic modification of HDPE pipes. Background technique [0002] HDPE pipe is a kind of pipe made of high-density polyethylene. HDPE pipe is a replacement product of traditional steel pipe and polyvinyl chloride drinking water pipe. HDPE pipe must withstand certain pressure, and usually choose large molecular weight and good mechanical properties. High-quality PE resins, such as HDPE resins and LDPE resins, have low tensile strength, pressure difference resistance, poor rigidity, poor dimensional stability during molding and processing, and difficult connections, so they are not suitable as materials for water supply pressure pipes. [0003] High-density polyethylene, white powder or granular product, non-toxic, tasteless, crystallinity 80%-90%, softening point 125-135 ℃, service temperature up to 100 ℃, hardness, tensile strength and creep Compared with low-den...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a plastic modification method for HDPE pipes, which has the advantages of good thermal conductivity, etc., and solves the problems of poor thermal conductivity and low hardness of traditional HDPE plastic pipes