Optical eyeglasses
With a density of between 1.14 and 1.15, it is lighter than other plastic eyeglass frames, about half the weight of sheet frames and 85% of nylon materials, which makes it ideal for long periods of wear.
TR90 material also has good chemical resistance, solvent resistance, weather resistance, not easy to burn, and high temperature resistance, a short period of time can be resistant to 350 degrees.