What material is the rear shell of the car headlight?
A car that uses a glass shade can even weigh more than ten or twenty kilograms.What's more, plastic cutting and shaping are simpler than glass, so they are replaced by glass. Some special cars also use the kind of toughened glass or even bullet proof glass.
General car headlamps are plastic parts, if you want to repair, you can use plastic welding method, welding plastic is simpler, and welding bumper. If the headlight is only a crack and is not broken, it can be welded directly with a plastic welding wire. If there is a leak, a similar back shell material should be found and repaired. Plastic welding is to heat the plastic welding wire with a heating gun (or blower) so that it can be glued to the surface to be welded. However, such as headlights, if broken, it is best to change, or it is easy to enter the water.
Before the car is the use of glass lampshade, the main reason is that due to technical limitations, the plastic strength of transparency can't achieve the transparency of the glass, in the light that high temperature does not reach without deformation and discoloration. Now the plastic lampshade has the means to achieve the transparency of the glass and not easy to change color characteristics, and the weight of the glass is obviously heavier than plastic.
The reasons for using plastic, plastic and glass compared to the elasticity of strong, not violent impact, the downstream buffer will not easily break, even if broken on the road, pedestrians, animals and the like, causing very strong damage. Generally speaking, plastic is better than glass, good mechanical property, strong plasticity, and chemical stability of acid, alkali and corrosion. Light weight.
