High temperature resistant single-mode fiber (polyimide coated cladding diameter 125um)
Polyimide is a polymer material with good high and low temperature resistance, good mechanical strength, and excellent comprehensive performance. It can greatly improve the temperature resistance of the fiber coating layer, extend the service life of the fiber in high temperature environments, and maintain good mechanical properties without brittle fracture in low temperature environments. Polyimide is a self extinguishing polymer with low smoke emission rate and a thermal expansion coefficient similar to quartz material. It has certain self-lubricating properties, can resist aging, high-voltage electrical breakdown, etc., and has little gas release under high vacuum. Polyimide has high radiation resistance and mechanical properties, and can maintain high strength in irradiation environments. It has high tensile, bending, and compressive strength, outstanding creep resistance, and dimensional stability. Polyimide has non-toxic stability and biocompatibility, and can be used to prepare tableware and some medical consumables replacement products. Meanwhile, polyimide is resistant to almost all organic solvents, some inorganic acids, and hydrolysis