A kind of wear-resistant high-impact nylon composite material and its preparation method and application

Abstract

The invention relates to a wear-resistant high-impact-resistance nylon composite material which comprises the following components in parts by weight: 20-80 parts of nylon resin, 10-50 parts of fiber material, 10-40 parts of anti-wear agents, 0.1-2 parts of surface treating agent perfluoropolyether, 0.1-1.0 part of lubricant and 0.1-0.6 part of antioxidant. The preparation method comprises the following steps: uniformly mixing different types of anti-wear agents at medium speed; heating to 90-100 DEG C, adding the perfluoropolyether, and uniformly mixing at high speed; adding the nylon resin, lubricant and antioxidant, and continuing mixing uniformly; and carrying out melt blending extrusion, drawing, cooling, and granulation on the obtained mixture and fiber material through a double screw extruder, thereby obtaining the wear-resistant high-impact-resistance nylon composite material. The wear-resistant high-impact-resistance nylon composite material has the advantages of low friction factor, favorable wear resistance, high mechanical strength, favorable heat resistance, excellent toughness, excellent impact resistance, low mold shrinkage rate, favorable dimensional stability, favorable flowability and high processability.

Description

technical field [0001] The invention belongs to the field of nylon materials, in particular to a wear-resistant and high-impact nylon composite material and its preparation method and application. Background technique [0002] Reinforced nylon composite materials have the characteristics of high physical and mechanical properties, good thermal stability, good electrical properties, and corrosion resistance, and are widely used in industries such as automobiles, electronics, defense, and mechanical equipment. And with the gradual implementation of policies such as "replacing steel with plastic", "automobile lightweight", "energy saving and emission reduction", the application fields of nylon composite materials are also expanding. [0003] Compared with other types of engineering plastics, nylon materials are usually used in the manufacturing fields of gears and bearings, but nylon has a high friction coefficient and poor wear resistance under dry conditions, which limits its...

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Problems solved by technology

[0004] (1) The wear-resistant agent is mainly composed of inorganic materials, and it is difficult to solve the compatibility problem with nylon: the addition amount is small, and the wear resistance performance is not improved obviously; the addition amount is large, and the mechanical strength of the composite material will be seriously lost;

[0005] (2) The addition of wear-resistant agent has a great influence on the toughness of the substrate, resulting in the failure of the impact resistance of the composite material and the drop resistance of the product to meet the requirements;

[0006] (3) Wear-resistant agents such as graphite, molybdenum disulfide, and silicon carbide are all black or dark fillers, and the composite materials prepared are mainly black. However, the EPS turbines used by various OEMs today require natural colors, which cannot meet the requirements of use. Require

[0007] The Chinese patent application with publication number CN105647173A discloses a wear-resistant nylon composite material and its preparation method. The composite material uses high-temperature-resistant nylon as the base material and molybdenum disulfide as the wear-resistant modifier. The advantages of the composite material are reflected The thermal deformation temperature is high, but the toughness is poor, and the composite material has not been reinforced and modified, so its strength and toughness cannot meet the application requirements of EPS turbines; at the same time, molybdenum disulfide is used as a black filler, and it is impossible to prepare natural wear-resistant Nylon composite materials also cannot meet the requirements of EPS turbine applications

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