Polyamide composite material and its preparation method and application

Abstract

The invention discloses a polyamide composite material which comprises, by weight, 20.0% to 40.0% of polyamide 6 with a low viscosity, 10.0% to 30.0% of polyamide 6 with a medium viscosity, 5.0% to 20.0% of a polar low temperature impact modifier, 1.0% to 8.0% of a wear-resisting agent, 0.2% to 5.0% of a heat stabilizer, 0.5% to 5.0% of a lubricant and 20.0% to 45.0% of a reinforcing component. The material has excellent performance and is especially applicable to preparation of cable rollers. The invention also discloses a preparation method for the polyamide composite material. According tothe method, polyamide 6 with a low viscosity, polyamide 6 with a medium viscosity, the low temperature impact modifier, the wear-resisting agent, the heat stabilizer and the lubricant are stirred anduniformly mixed; an obtained mixture is added into a double-screw extruder, and the reinforcing component is added into the double-screw extruder to prepare the polyamide composite material. The method has the advantages of simple operation and suitability to industrial production.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a special polyamide composite material for power grid engineering cable guide wheels and its preparation method and application. Background technique [0002] With the advancement of power grid construction and power grid optimization and upgrading, the laying mileage of high-voltage lines has greatly increased, and the demand for cable guide wheels for installing high-voltage lines has also increased significantly. The use environment of the cable guide wheel is more complicated, and it needs to work normally in mountains, valleys, and plateau snow fields. As a functional part, it is often subjected to large tension, impact and friction, and the material is required to have high rigidity and toughness. At the same time, It is also necessary for the material to have high scratch resistance. [0003] At present, the power grid engineering cable guide wheels used at home and abroa...

AI Technical Summary

Problems solved by technology

[0003] At present, the power grid engineering cable guide wheels used at home and abroad usually use cast nylon. With the improvement of current requirements, the cable guide wheels formed by cast nylon have the following disadvantages: (1) Large volume and heavy weight (cast nylon The mechanical strength is low. In order to meet the high strength requirements of the cable guide wheel, the cable guide wheel is often designed to be very thick); (2) It is difficult to recycle: the cast nylon has a large molecular weight and high toughness, and it is difficult to recycle; ( 3) The processing and molding cycle is very long and the production efficiency is low

[0005] Although nylon 6 (PA6) resin has many advantages, it cannot fully meet the material requirements of the cable guide pulley, such as the rigidity of the material needs to be improved, the toughness of the material, especially the impact strength under low temperature and dry conditions, and the material's toughness. Scratch resistance needs to be improved, there are technical defects

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