News - Zhengshun polycarbonate solid sheet applied in sun glasses

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Zhengshun polycarbonate solid sheet applied in sun glasses

time2018/07/18

This is a title PC material performance and the characteristics of PC myopic lens

Polycarbonate (PC) myopia lens, commonly known as space myopia lens, (it is made by optical grade PC injection molding and processing) and other materials of myopia lens comparison,1. The weight of Light weight PC is 1.20g/cm3, while that of cr-39 is 1.32g /cm3, and that of mk-55-c is 1.28g/cm3.The glass has a specific weight of 2.61g/cm3.As can be seen from the comparison, for lenses of the same size and geometric size, PC lenses further reduce the weight of the lenses due to their minimum weight.2. The lens Thin Thin Thin Thin lens can make the lens thinner by virtue of its excellent impact resistance.In addition, the reason for the thinner lenses can be found in terms of refractive index of PC materials.CR - 39 (ADC), the refractive index of 1.499, NK - 55 - C (passbook) of refractive index is 1.550, the PC of the refractive index is 1.586, and the higher the refractive index of the material, the thinner lenses can be made, and the refractive index of the lower the material of the lens is thicker, so the PC myopic lens relative to CR - 39 and fold the lenses, the edge of the concave lens thickness is relatively thin.

3. Excellent security PC with Excellent shock resistance performance is called the "king of plastic".Can be widely used in the manufacture of aviation Windows, bulletproof "glass", riot masks and shields.The impact strength of PC is as high as 87/kg/ cm2, which is 12 times higher than that of CR-39.Pc-made glasses can't be broken even when they are put on the cement floor. They are the only ones that can't be broken.So far, PC lenses are unparalleled in terms of security.4. Modern medicine has proved that ultraviolet radiation is the main reason for eye cataract.Therefore, the requirement for the lens to absorb ultraviolet ray is more and more clear.General optical resin lens, the performance of the material itself also has a part to absorb ultraviolet light, but if you want to prevent ultraviolet through, must add a certain amount of uv absorber, and PC myopia more effective blocking ultraviolet rays.5. Good weathering resistance PC is one of the engineering plastics with Good weather resistance.According to the outdoor natural aging experiment data, the tensile strength of the product was almost unchanged after 3 years of outdoor placement, and the fog degree and yellow index were slightly improved.