Sep. 18, 2019
The development of automotive optical products has made lens headlights the trend of the times, not only widely used in high-end cars, but also gradually popularized to low-end models. A lens, like the lens of the human eye. Most of the traditional automotive lenses adopts glass optical lenses, which have high light transmittance, high hardness and anti-aging. They have unparalleled advantages in application, but they are also accompanied by shortcomings such as high price, easy chipping and difficult processing.
Since then, PC and PMMA lenses have entered the market with the development of materials, molds and injection molding technology. Compared with glass, its good processing characteristics bring different cost performance. But its flaws that are prone to yellowing are also plaguing most automakers. Thus, the demand for optical silicone came into being.
LLSR-Light liquid silicone rubber has the advantages of high light transmission, light transmittance of up to 95%, and excellent UV and blue light stability. The headlights of the car use high-power light source. Although the new-generation LED system features low-power and high-brightness output, the temperature of the popular model is as high as 150 °C. Under the combined effect of high temperature and high radiation, it is easy to accelerate. The aging of optical thermoplastic lenses shortens the life of LED systems. However, The physical stability of the silicone lens can completely solve the lens yellowing problem.
Compared to halogen headlights, LSR lens headlights have a wider, more uniform, and brighter range of low beam illumination. The light and dark cutting lines of the low beam are more obvious, and the strong lighting effect during night driving will not interfere with the sight of the opposite driving. The effect of high beam illumination is even more difficult than that of halogen lamps. In the switching of far and near light, the mechatronic LSR lens dimming system is far superior to the halogen headlights, and its switching speed is lightning fast, which means that driving at night becomes safer.
It’s ridiculous to make lenses with synthetic rubber, because this market has traditionally been monopolized by rigid materials. "In fact, the LSR material performance, such as transparency, no cracks under stress, and the possibility of economically manufacturing complex geometries, provide unlimited possibilities for future applications of this highly transparent material," said Thorsten Hauser, Head of Momentive LSR Automotive Applications Technology Director.
LSR material has low viscosity and low injection pressure, which can be directly layered on the chip to reduce production costs.
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