Production molding technique of steel wire mesh/fiber mesh framework dual-resistance PP composite pipe used underground coal mine

Abstract

The invention provides a production molding technique for a steel wire mesh / fiber mesh framework dual-resistance PP composite pipe used underground a coal mine, and belongs to the technical field of production of PP composite pipes. The molding technique specifically comprises the steps of surface coating of steel wires / fibers, extrusion of a dual-resistance PP modified inner core pipe, formation of a steel wire mesh / fiber mesh formwork through winding of the steel wires / fibers, formation of a steel wire mesh / fiber mesh framework reinforcing layer (injecting extrusion of hot melt adhesives on the inner layer and coating extrusion of hot melt adhesives on the outer layer), extrusion molding of a dual-resistance PP modified composite pipe outer layer, and the like. By adoption of the production molding technique for the steel wire mesh / fiber mesh framework dual-resistance PP composite pipe used underground the coal mine, the surface of the obtained composite pipe is compact, smooth and clear and has a good anti-static effect.

Description

technical field [0001] The invention belongs to the technical field of production of PP composite pipes, and in particular relates to a production and molding process of steel wire mesh / fiber mesh skeleton double-resistant PP composite pipes for underground coal mines. Background technique [0002] my country has been the world's largest producer and consumer of coal for many years in a row, and currently accounts for about half of the world's production and consumption, which is mainly used in heavy chemical industries such as electric power, metallurgy, and building materials. [0003] For underground pipes in coal mines, people have been using metal pipes and non-metallic pipes, and metal pipes are easily corroded by other chemical media. Corrosion is one of the main factors that cause pipeline rupture. The annual maintenance and anti-corrosion painting of metal pipelines is extremely expensive. [0004] In recent years, steel mesh skeleton reinforced PE pipes have parti...

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Problems solved by technology

[0008] Due to the addition of a large number of additives to the double-resistant PP modified polymer material, this greatly affects the processing temperature, fluidity, compression ratio, stretch ratio, shrinkage ratio, etc. of the material, and the most obvious is the material The high melt viscosity leads to poor surface finish of the pipe during the extrusion molding process; in addition, the surface density of the composite pipe is required to be high, so that the antistatic agent in the material can be more compact and exert a better effect, reducing the surface of the composite pipe. Resistance, to achieve the purpose of antistatic

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