A method for manufacturing a three-resistance light-blocking composite pipe

Abstract

The invention discloses a method for preparing an anti-microbial, anti-oxygen, anti-ultraviolet and light-resisting composite pipe, relates to a technology for preparing the anti-microbial, anti-oxygen, anti-ultraviolet and light-resisting composite pipe, and belongs to the technical field of novel material and process. The method is characterized in that the anti-microbial, anti-oxygen, anti-ultraviolet and light-resisting composite pipe is formed by co-extrusion of three layers, wherein the thickness ratio of an inner layer to a middle layer and the thickness ratio of the middle layer to an outer layer are 0.618. The method has the beneficial effects that the anti-microbial performance of the pipe is improved; the anti-oxygen capacity and anti-ultraviolet capacity of the pipe are improved; by changing the crystallinity of a material and the size of a spherical crystal, the heat distortion temperature of the pipe is improved, and the coefficient of linear expansion is reduced; the impact strength, particularly low-temperature impact strength, of the pipe is improved; and the internal pressure resistance strength and hardness of the pipe are improved.

Description

technical field [0001] The invention relates to a manufacturing technology of a composite pipe with antibacterial, anti-oxidation, anti-ultraviolet and light-blocking properties, which belongs to the technical field of new materials and techniques, in particular to a method for manufacturing a three-anti-light-blocking composite pipe. Background technique [0002] PP-R pipe is also called three-type polypropylene pipe, which is made of random copolymerized polypropylene, which is extruded into pipes and injected into pipe fittings; it adopts gas phase copolymerization process to randomly and uniformly polymerize about 5% PE in the molecular chain of PP (no It has become a new generation of pipe material; it has good impact resistance and long-term creep performance; the interface of PP-R pipe adopts hot-melt technology, and the pipes are completely fused together, so once the installation pressure test passes, There will never be any more water leakage, and the reliability i...

AI Technical Summary

Problems solved by technology

The tertiary carbon free radical is very active, which can cause various reactions of the molecular chain, including chain growth and chain degradation, resulting in the loss of the original properties of PP, resulting in discoloration, cracking, pulverization and mechanical property damage of the pipe, seriously Affect the service life of the pipe

[0004] In order to improve the service life of the pipeline, casting wear-resistant materials in steel pipelines, pasting ceramic sheets or wear-resistant plastic sheets is generally used at home and abroad. The above methods have poor service life due to the poor performance of wear-resistant materials and the overall performance of the patch. There is no great improvement, especially for complex pipes with a diameter of less than 1cm or curved pipes, the patch method cannot be implemented manually. The requirements for the use of R pipes are particularly important

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