Yesterday, Tai Ge just sent a collection of auto parts about some as long as they can be repaired, they will not be replaced, and as a result, many owners in the background have feedback that their headlights are aging and cracked, and there is no place to repair, and they can only be replaced.
To be honest, as the age of the car rises, the headlights, as part of the windward side of the front of the car, are subjected to the sun, rain and wind, and they will definitely become "old and yellow".
So how did the headlights turn yellow?
How do I maintain or DIY repair my lights to renew them?
Today, Tiger came to talk to the masters about these things about the yellowing of the headlights.
Che Lao Zhu Huang originates from aging
Polycarbonate plastic is prone to yellowing and cracking
Why do headlights get yellower and yellower? In fact, this is related to the material used in the headlights, more than 99% of the current lights on the market are polycarbonate materials used as headlamp lampshades, in simple terms, polycarbonate is a high transmittance low light distortion of a transparent material, that is, a strengthened version of transparent plastic. All plastic products are exposed to the air for a long time and are affected by high temperature, ultraviolet rays and oxidation, and the polycarbonate material will appear yellow and cracked when it ages.
Yellowing of the headshade will affect the light transmittance and affect the driving at night. Then some old masters will say, then change the headlight shade will not be solved? Tiger said that the idea is very good, but the general auto repair shop will refuse the request of the old man to change the lampshade.
Because for auto repair shops, the cost of changing the lampshade is very cheap but requires a lot of man-hours to replace, and the headlamp assembly also has risks such as air leakage deformation. The direct replacement of the headlight assembly is more profitable, does not require too many man-hours, and can be installed directly.
Headlight anti-aging maintenance
Mainly look at car wash and physical protection
Now the headlights are more and more advanced and more expensive to sell, for many car owners, the cost of changing the headlights may be a small half a month of living expenses. So is there any better way to effectively protect the headlights from aging and damage?
In fact, the method is also very simple, pay more attention to the car wash, and paste the protective film yourself.
Wipe more with a soft cloth
For the daily headlight shade maintenance, car washing is actually a simple and effective way to clean the headlights. The main material for headlights is transparent polycarbonate plastic. This material has a relatively large corrosive effect on alkaline active agents, so it is best for the masters to use neutral cleaning agents for cleaning when washing the car, and the lamps are not prone to stubborn dirt. Usually, after washing the car, be sure to let the car washer dry the headlights with a clean and soft wipe. This avoids some small scratches that are invisible to the naked eye due to rubbing on the headlights after the car wash.
Attach TPU protective film to the headlights
Earlier, Tiger mentioned more than once that the surface material of the headlights is polycarbonate, but everyone does not know that this guy's English abbreviation is called: PC (resin glasses lenses are this material). Yes, PC, the most common material in engineering plastics, has the benefit of being strongly impact resistant. But the weakness is also very clear, that is, fear of ultraviolet rays.
Therefore, in theory, as long as the ultraviolet rays are isolated, the aging problem of PC transparent parts can be greatly reduced. It just so happens that the main component of the car coat, TPU, is a thermoplastic polyurethane, and the coating on the surface can be very effective in resisting ultraviolet rays, and slowing down the aging problem of the headlight transparent parts through its own yellow aging.
In an orange software, the price of a set of TPU lamp film is also about 100 yuan, even if the owners of the car accidentally scratched and changed a piece, it is not painful.
You can also renovate the headlights yourself
"Steam the face" of the headlights and polish them
In terms of lamp maintenance, if the first two steps of the old masters can pay more attention, the general 6-7 years of the headlights will basically not appear visible to the naked eye aging. But if the masters have yellowed or scratched headlights, they need to do a separate repair operation.
Of course, the difficulty of this operation is not particularly high, Tai Ge recommends two separately here, as long as you master the key tips, you can also DIY yo.
First of all, the first one: physical grinding repair
Generally speaking, the yellow of the headlamp becomes aging, and after the coating layer on the surface of the main transparent part fails, the ability to resist fouling plummets, resulting in a decrease in the light transmittance of the lampshade. The easiest way to do that is to solve most of it by decontamination and polishing. Commonly used means can be used to wipe and polish with a soft cloth dipped in polishing wax or polishing paste, which can effectively remove stains and small scratches on the surface of the lampshade.
If the headlamp shade is aging to a large extent, it is necessary to blow dry the surface water after the water sandpaper is polished and polished. At this time, the surface of the headlights shows a mist of sandpaper sanding. You can then buy photosensitive self-spray varnishes online, spray them on the surface of the headlights three times, and wait until the paint surface dries and then look new.
The second type of chemical repair is solvent fumigation
Plastic itself is a resin material, and the masters who have done static models know that the best way to make the model interface sticky and invisible is to let the two things themselves melt together. Transparent PC pieces such as headlights can also be repaired using this logic, so that they can be slightly melted to achieve the purpose of repair.
This method is called chemical fumigation!
Before fumigation, the same need to be polished and polished to the matte effect of water sandpaper, after blowing drying the surface water, toluene itself is a resin solvent, through electric heating atomization after blowing on the surface of the lampshade can play a dissolving effect, slightly liquefied PC will appear similar to the effect of self-leveling due to surface tension, then the headlamp "cataract" will also heal smoothly.
Seven points of vehicles rely on maintenance and three points on repair is not empty, the importance of vehicle maintenance must not be ignored by the masters. About today's lamp maintenance and repair tips guys are getting it?
How do the guys take care of the headlights?
New energy car owners scan the code to receive free car wash