Wear-resistant crosslinked PE (Polyethylene) composite pipe and manufacturing method thereof

Abstract

The invention relates to a wear-resistant crosslinked PE (Polyethylene) composite pipe and a manufacturing method thereof, belonging to the technical field of PE pipes. The composite pipe is obtained by fusing, extruding and pelletizing 100 parts of PE, 1-3 parts of scratch-resisting agent, 0-10 parts of carbon fiber, 0-5 parts of elastomer, 0.05-0.2 part of antioxidant, 0.2-1 part of crosslinkedaccelerating agent and 0.5-1 part of lubricating agent with double screws, performing vacuum drying, spraying a silane crosslinking agent and extruding by an extruder. By adopting a chemical modification method, the connection of a PE molecular chain is enhanced, a three-dimensional network structure is formed, and the creep resistance and surface solid particle impact resistance of a material are enhanced. By adopting a physical modification technology, the scratch-resisting agent and a reinforcing agent are compounded in a PE material, a PE crosslinked composite material with balanced toughness, strength and hardness is obtained, the wear resistance, heat resistance, tensile strength and elongation percentage of PE are enhanced, and the PE pipe is suitable for conveying powder, solid particles and slurry and has wide market prospect.

Description

technical field [0001] The invention belongs to the technical field of polyethylene pipes, and in particular relates to a cross-linked polyethylene composite material and a preparation method thereof. Background technique [0002] With the development of industry, long-distance pipeline transportation of slurry and powder has developed rapidly in my country, such as fly ash transportation of coal power plants, dredging of rivers, lakes and seas, grain transportation and other metallurgical and mineral fields. There are various types of pipes in this field, but they all require a wear resistance. At present, steel pipes are commonly used in the market, but steel pipes have disadvantages such as poor corrosion resistance, high friction coefficient, short service life of pipes, and high system maintenance costs. [0003] High-density polyethylene has high strength, corrosion resistance, impact resistance, low friction coefficient and other properties. The pipes made of it have...

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Problems solved by technology

Therefore, this type of piping system has gradually attracted the attention of plastic pipe manufacturers. Compared with steel pipes, plastic pipes have the advantages of light specific gravity, corrosion resistance, and low installation costs. The erosion of solid particles, so it is necessary to further improve the wear resistance of the material. At present, ultra-high molecular weight polyethylene pipes and their composite pipes are more developed in the field of wear-resistant pipes. The disadvantages are difficult extrusion molding, low production efficiency, and high wear resistance. No improvement in thermal performance compared to ordinary polyethylene

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