Recently, the "third generation resin lens", which combines the advantages of the "first generation resin lens" and PC lens, was finally born at the 20th China Beijing International Glasses Exhibition. It is a PMC resin lens developed and produced by Shanghai Yueming Optical Glasses Company. PMC sheet is made of polyurethane as the main raw material, isocyanate and other raw materials by casting reaction polymerization, which integrates impact resistance, super hard film and high permeability, effectively making up for the shortcomings of the first and second generation resin lenses and becoming the pioneer of the "third generation resin lenses" after PC. According to the test, PMC film has strong impact resistance. When 55g steel ball falls from1.27m, the lens is intact, far exceeding the impact index of the national standard, and the safety factor is extremely high. PMC loss is also very strong: the haze value is less than 0.2%, far less than the national standard value of 0.8%, which fully shows that the lens has strong wear resistance and long service life; Tested by spectrophotometer, the transmittance of PMC is higher than that of the "first generation" and "second generation" resin lenses. It is understood that after the release of PMC lens, it was immediately favored by customers in the glasses industry.
PMC resin lens takes polyurethane as the main raw material and isocyanate as the raw material, which integrates impact resistance, superhard film and high permeability, effectively making up for the shortcomings of the first and second generation resin lenses and becoming the pioneer of the "third generation resin lens" after PC. According to the test, PMC lens has strong impact resistance. When 55g steel ball falls from1.27m, the lens is intact, far exceeding the impact index of the national standard, and the safety factor is extremely high. The wear resistance of PMC lens is also very strong: the haze value is less than 0.2%, far less than the national standard value of 0.8%, which fully shows that the lens has strong wear resistance and long service life; The visible light transmittance of PMC is higher than that of the "first generation" and "second generation" resin lenses by spectrophotometer. It is understood that after the release of PMC lens, it was immediately favored by customers in the glasses industry.