High-impact high-modulus nylon composite material and preparation method thereof

Abstract

The invention discloses a high-impact high-modulus nylon composite material. The nylon composite material is composed of the following raw materials in percentage by mass: 55-65% of PA66, 25-35% of glass fiber fillers, 5-10% of a mineral filler, and 0.2-1% of a lubricant, wherein 0.4-1% of an antioxidant can be added into a light-color product to avoid the problem of yellowing of the material in the production process. The nylon composite material has the advantages that the prepared PA66 composite material retains the characteristics of high modulus, high strength, high hardness and self-lubrication of original nylon, the impact strength of the material is also obviously improved, meanwhile, the glass fiber exposure condition cannot occur to the appearance of the product, the product canbe widely applied to automobile intake manifolds and bearings, and the product can also be used as stress parts such as gears due to excellent surface and dimensional stability. The product has the advantages of simple preparation technique and low cost, and can easily implement large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of macromolecular materials, and in particular relates to a nylon composite material with high impact resistance and high modulus and a preparation method thereof. Background technique [0002] Due to its excellent mechanical strength, heat resistance, wear resistance and self-lubricating properties, PA66 products are widely used in various mechanical and electrical parts, including bearings, gears, pulley pump impellers, blades, high-pressure sealing rings, gaskets, valves, etc. Seats, bushings, oil pipes, oil reservoirs, ropes, transmission belts, grinding wheel adhesives, battery boxes, electrical coils, cable joints, etc. With the further improvement of the country's energy saving and emission reduction requirements and the rapid development of China's automobile industry, automobile lightweight It has become an important way for automobiles to save energy and reduce emissions, and has become the main trend of aut...

AI Technical Summary

Problems solved by technology

[0003] Problems faced by traditional glass fiber reinforced PA66: Because the raw material PA66 notched impact strength is not high, after the introduction of reinforced filling, its notched impact strength has become an obvious shortcoming in all mechanical properties, and the product will be destroyed because the notch is too low , losing the advantages compared with other types of reinforced plastics; and with the increase of glass fiber filling ratio, the surface of the product may lose the self-lubricating property of PA66 itself. When making gears and other parts that require low friction and dimensional stability, etc., Due to the strong hygroscopicity of PA66 itself, it is not conducive to dimensional stability after the material absorbs water for a long time; adding fillers can effectively improve the dimensional stability, and at the same time, the coating ability of the material to the filler should be considered after the filling ratio is increased.