Characteristics and applications of aramid fiber
Writer： admin Time：2023-10-31 17:35 Browse：
Aramid fiber is a new type of high-tech synthetic fiber, which has the characteristics of soft texture, low density, high strength, high modulus and high temperature resistance. It can be used at 220 ℃ for more than 10 years, and does not decompose or melt at 560 ℃.
The strength of chopped aramid fiber is 5-6 times that of steel wire, the modulus is 2-3 times that of steel wire or glass fiber, the toughness is 2 times that of steel wire, and the weight is only about one fifth of that of steel wire. It is an important basic material in aerospace, aviation, national defense, electronics, chemical industry development and other high-tech fields.
Aramid fiber cloth is widely used in the reinforcement of old bridges
When reinforcing members, aramid fiber cloth is mainly used to resist tension, which is generally used for the tensile parts of beams, the shear parts of beams and columns, and the confinement reinforcement of columns or bridge piers and abutments. Aramid fiber reinforced reinforced concrete rigid frame arch bridge has the advantages of simple process, convenient construction and low comprehensive cost, which is worth popularizing.
Using para aramid fiber in the belt of car radial tire can reduce the rolling resistance of tire by 5% - 7%; For truck tire carcass, the mass can be reduced by 2.4 ~ 5.2, the air temperature in the tire is 5cc lower than that of steel tire, the tread life is prolonged by 12 ~ 14%, and the fuel saving is increased by 1.25%; Used in the belt layer of truck tire, the mass can be reduced by 5.5 ~ 6.7 kg, the impact resistance is better, and the fracture energy is 20% higher at the same belt strength; Compared with nylon, the tread life of bias truck tire is prolonged by 20% - 25%; It is used for the coating of aviation tire belt, with excellent wear resistance; Good cutting resistance can be obtained for engineering tyres.
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