High-strength cold-resistant aramid fiber synchronous belt and preparation method thereof

Abstract

The invention relates to the field of aramid fibers, particularly to a high-strength cold-resistant aramid fiber synchronous belt and a preparation method thereof. The high-strength cold-resistant aramid fiber synchronous belt is prepared from aramid short fibers, nylon short fibers, glass fiber core wires, ferroferric oxide, phenolic resin, N-2,2-dibenzamido diphenyl disulfide, calcium borate, silicon dioxide, aluminum oxide, bentonite, sodium carboxymethyl cellulose and silicone rubber. According to the method, the performance of all the raw materials is fully considered, fiber sorting is guided under an external magnetic field through the magnetic materials, the synergistic effect among the raw material components is effectively enhanced, good use of the synchronous belt at the low temperature is guaranteed, and the use time of the synchronous belt in the low-temperature environment is prolonged.

Description

technical field [0001] The invention relates to the field of aramid fiber synchronous belts, in particular to a high-strength cold-resistant aramid fiber synchronous belt and a preparation method thereof. Background technique [0002] The polymer chain of aramid fiber has very high rigidity, and the molecular chains are highly crystallized. The surface of aramid fiber is quite inert, resulting in poor bonding performance between aramid fiber and other materials, especially with silicone elastomers. The binding force is even less ideal. In order to improve the binding force between aramid fiber and silicone elastomer, a lot of research work has been carried out at home and abroad, mainly including: (1) modifying the surface of aramid fiber to improve the activity of the surface of aramid fiber; (2) Select the appropriate aramid fiber weaving structure to increase the contact area between the aramid fiber weaving and the silicone elastomer; (3) adjust the chemical composition...

AI Technical Summary

Problems solved by technology

For example, the patent No. CN201210037877.9 is a method for preparing an aramid-organic silicon composite material. The silicone-modified polyurethane, reinforcing agent and cross-linking agent are mixed, and the mixed organic Silicon-modified polyurethane, reinforcing agent and cross-linking agent are applied to the surface of aramid fabric, and baked at 100-150°C for 1-10 minutes. The prepared aramid-organic silicon composite material has high tensile strength, durability Low temperature and other characteristics, but the surface activity of the fiber is not enough, resulting in the inability to maximize the grafting effect, which affects the further function of the aramid fiber, and the fiber used is single, making it difficult to fully function; another example is the thermoplastic polyurethane with the patent number CN201710117892.7, The preparation method of aramid fiber modified nylon 66 composite material, using polyurethane, aramid fiber, PA66 and other materials and compatibilizer auxiliary materials, in a certain proportion, the composite material produced by twin-screw extrusion blending, the prepared composite material It is not only flame retardant, but also has excellent high and low temperature resistance and comprehensive physical properties, but there is no targeted improvement in the components, resulting in the inability to maximize complementarity and optimize material properties at low temperatures, and the current research will be aromatic Aramid fibers are rarely used in synchronous belts, so it is extremely necessary to prepare a method for making low-temperature synchronous belts according to the characteristics of aramid fibers