Composite aramid yarn

Composite aramid yarn: the full name of aramid is aromatic polyamide fiber. It is an organic synthetic material with high strength, high modulus, low density and high wear resistance, and has stable chemical properties.I974 years, American trade union FTC (U.S FederalTradeCommission) will they named "Aramidfiber", defined as: at least 85 amide chain (a CONH) directly connects the two benzene rings.Aramid fiber HF 1, Nomex fiber with excellent thermal stability, was developed by dupont in the early 1960s.In China, aramid was identified by aramid 14 in 1981, and then by aramid 1414 in 1985.Due to the defects of single aramid fiber in use, the strength decreases after water exposure, etc., aramid fiber is usually made into composite materials to meet the requirements of its application performance, and composite aramid yarn is made by dry winding or wet winding to meet the requirements of friction materials.