Ultrahigh molecular weight polyethylene/polyvinyl chloride composite pipe and manufacture method thereof

Abstract

The invention relates to an ultrahigh molecular weight polyethylene / polyvinyl chloride composite pipe and a manufacture method thereof. The ultrahigh molecular weight polyethylene / polyvinyl chloride composite pipe is manufactured by compounding an ultrahigh molecular weight polyethylene inner pipe and a polyvinyl chloride outer wall, wherein the ultrahigh molecular weight polyethylene inner pipe comprises the following raw material components in parts by weight: (1) 100 parts of the ultrahigh molecular weight polyethylene with viscosity-average molecular weight larger than or equal to 1.5 million, 2.1-10 parts of polyvinyl chloride with the molecular weight of 2,000-10,000; and the polyvinyl chloride outer wall comprises 100 parts of polyvinyl chloride resin (PVC), 5-15 parts of impact modifiers, 0.5-8 parts of heat stabilizers, 0.07-1 part of lubricants and the balance of dyestuff. The invention provides an ideal ultrahigh molecular weight polyethylene / polyvinyl chloride composite pipe with friction resistance, corrosion resistance, high strength, creep resistance and firm fastening of the inner pipe and the outer wall and the manufacture method thereof with firm compound and low production cost. The invention is suitable for transporting corrosive, adhesive, high abrasive materials.

Description

Technical field [0001] The invention is an ultra-high molecular weight polyethylene / polyvinyl chloride composite pipe and a manufacturing method thereof. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) pipes are wear-resistant, corrosion-resistant, have good chemical stability, and have low surface polarity. They are difficult to dissolve and bond. They are particularly suitable for transporting corrosive, adhesive, and highly abrasive materials. Fluid materials. However, it has the disadvantages of low tensile and shear strength and poor creep resistance, which limits its application. [0003] Toughened polyvinyl chloride (PVC) materials have high tensile and impact strength and good rigidity, but their wear resistance, anti-adhesion and solvent resistance are far inferior to ultra-high molecular weight polyethylene pipes, making it difficult to meet relevant sanitary technical standards. Its application is also limited. [0004] The metal...

AI Technical Summary

Problems solved by technology

However, there are deficiencies in tensile strength, low shear strength, and poor creep resistance, which limit its application.

[0003] Toughened polyvinyl chloride (PVC) material has high tensile strength, high impact strength, and good rigidity, but its wear resistance, anti-adhesion, and solvent resistance are far inferior to ultra-high molecular weight polyethylene pipes, and it is difficult to meet relevant sanitary technical standards

Its application is also limited

[0004] The metal-plastic composite pipes in the prior art consume a large amount of metal materials. The manufacturing process requires flanging, welding flanges and other manufacturing processes. And the processing technology is complex, the production cost is high

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