Special pipeline for salt lake dredging

Abstract

The invention relates to the technical field of salt lake chemical engineering, in particular to a special pipeline for salt lake dredging. The special pipeline is prepared from, by mass, 70%-80% of ultra-high-molecular-weight polyethylene, 3%-25% of glass fibers, 0.1%-3% of a silane coupling agent, 1%-5% of graphite, 1%-10% of polyethylene wax and 5%-15% of pin-shaped wollastonite. By the adoption of the component ratio, the special pipeline for salt lake dredging has excellent physical performance and use performance, the flowing performance of ultra-high-molecular-weight polyethylene is improved on the premise of maintaining original mechanical performance, the production efficiency of the pipeline is improved, the quality of the pipeline is improved on the whole, and the industry scale is enlarged.

Description

technical field [0001] The invention relates to the technical field of salt lake chemical industry, in particular to a special pipeline for dredging salt lake. Background technique [0002] Salt lake dredging special pipe (UHMW-PE) is a thermoplastic engineering plastic with an average molecular weight greater than 2 million, which is polymerized by ethylene and butadiene monomers under the action of a catalyst. The material has excellent comprehensive performance, wear resistance, low temperature resistance, corrosion resistance, self-lubrication, and impact resistance are the highest among all plastics, and its wear resistance is better than polytetrafluoroethylene, nylon, carbon steel and other materials, and can be used for a long time Working under the condition of -169 to +80 ℃, it is called "amazing" engineering plastics. Ultra-high molecular weight polyethylene pipe technology is becoming more and more mature in my country, and more and more projects have adopted th...

AI Technical Summary

Problems solved by technology

[0005] Although ultra-high molecular weight polyethylene has extremely excellent properties, due to its extremely high viscosity and low critical shear rate, it has poor fluidity, poor stress resistance, and easy cracking during production, and its products Molding is particularly difficult

For a long time, due to the relatively backward domestic UHMW-PE molding technology and equipment, and a large gap with advanced countries, UHMW-PE products have not yet been put into large-scale industrial production, and are limited to pressing-sintering or plunger extrusion. Small-batch production based on molding methods, the product types are mainly simple cross-section products such as plates and bars, the production efficiency and product output are low, the product quality is difficult to guarantee, and the production energy consumption and product cost are high. my country's market demand and application of UHMW-PE resin, and 80-90% of domestic UHMW-PE resin raw materials have to be sold abroad at low prices

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