Do you know what the little black dots on car glass do?

Black spots on the windshield can effectively reduce sun dark spots and improve driving safety. In addition, these black dots can also act as a protective windshield sealant, avoid local overheating of the glass edges, prevent glass deformation, and avoid glass damage. The scientific name of the small black dot on the windshield of a car is ceramic ignition.

It is a ceramic material that is sintered into glass and is tightly bonded to glass and is difficult to remove. Car windshields are glued to the frame with polyurethane sealant. The front windshield of the car is bonded with polyurethane sealant.

Polyurethane sealant is an environmentally friendly sealant, no odor, not easy to flow during construction, with high strength, wear resistance and cold resistance.

Proper adhesive seals for windshields. However, the biggest drawback of polyurethane sealant is that it is afraid of UV radiation. Long-term UV exposure can cause the sealant to age and crack.

The installation of automotive glass is fixed with glass glue, even if the glass is placed on it using the best mechanized sizing method, the uneven distribution of glue can be seen. Therefore, the use of black bars can effectively solve this defect, and can also block direct sunlight from the glass glue to avoid accelerated aging. In addition, these black dots can cover the gaps in the interior around the windshield.

If they are completely transparent, the gaps in the carports and dashboard edges of some cars will be exposed, which will affect the appearance.

For safety reasons, light should also be avoided from refracting on the edge of the glass, forming light spots on the glass surface and affecting the driver's driving. The main ingredient of this black spot is not ordinary black ink. After tempering, the ink and glass are sintered together and cannot be scraped off.

It also makes the front windshield more durable. Sunlight on glass also has temperature. If it is transferred to the glass, uneven heating can also cause the glass to break.

When we pour hot water into a regular glass, there is a certain chance that the glass will break. Black dots absorb heat faster and then store the heat in black dots of different sizes. Take a closer look.

The larger the point near the edge, the smaller the point near the center.

Mainly for aesthetics, because the car glass cannot be perfectly beaten when gluing, and these small black spots can have the effect of concealment.

Small black dots on the glass can reduce sun spots and improve driving safety, these black spots can also protect the windshield as a sealant, and can also prevent the edges of the glass from getting too hot, preventing the glass from deforming or being damaged.

It can play a cushioning and deceleration effect, and can protect the car glass, can prevent the car glass from being damaged, prevent the car glass from breaking, and can prevent the glass from breaking.

The sealant that can protect the windshield, prevent the glass from deformation, prevent the glass from expanding, avoid glass damage, and can also reduce direct sunlight, play the role of shading, and improve the safety factor of driving.

Friends who cherish the car more or use the car more carefully may notice that behind the front windshield ** rearview mirror, there are small black dots on the glass, what is this black dot for? Of course, not all cars have it, the Audi A6 and BMW X1 don't, here are just the majority. Today, we will explain this problem from multiple angles and in a more scientific way.

If you've heard about the role of these little black dots, such as transmitting sensing signals through this area or for electronic capture, these claims are actually unscientific. The correct interpretation should be this.

1. For the sake of beauty and ugliness

The installation of automobile glass is fixed by glass glue, and no matter how good the mechanized glue is, you can see the uneven distribution of glue when you put the glass on it. Therefore, the use of black bars can effectively solve this defect, and it can also block direct sunlight from glass glue to avoid accelerated aging. In addition, these black dots can cover the gaps in the interior around the windshield, and if they are fully transparent, the gaps in the carport and the edge of the dashboard of some cars will be exposed, which will affect the aesthetics.

2. In order to prevent refraction of the glass edge

Another reason is to avoid the refraction of light on the edge of the glass, forming light spots on the surface of the glass, affecting the driver's driving, and also for safety. The main component of this black spot is not ordinary black ink, after tempering, the ink and glass are sintered together and cannot be scraped off.

3.Reduces heat absorption and makes the glass more durable

Then this black dot can also make the front windshield more durable, your sunlight on the glass also has a temperature, transmitted to the glass, if the heating is uneven, it may also cause the glass to burst.

You just think of our ordinary glass, and suddenly pour hot water, and the cup has a certain chance of snapping and breaking.

So this little black dot absorbs the heat faster, and then stores the heat in the black dots of different sizes, and if you look closely, the point closer to the edge is bigger, and the point closer to the center is smaller, which is quite interesting.

The above is the function of the black dot on the glass, I believe everyone will understand it here? Some Audi or BMW windshields do not have black spots because the glass they use has been specially treated and does not need to consider the above three situations.

The small black dots on the edge of the car glass function as follows:

1. Protect the car window, the car glass and the car are fixed with glue, after the car glass is exposed to the sun in summer, the temperature of the metal frame around the car glass will rise and expand, and the light transmittance and heat dissipation of the middle part of the glass are better, forming a contrast with the edge of the glass, which is easy to lead to glass deformation. Glass is not tough, and the result of deformation is explosion, which requires these black dots to conduct heat.

2. To protect the line of sight, in addition to the edge of the window and the front windshield, there are also small black spots above some rearview mirrors. The location of these black dots and their area are carefully designed so that they do not obstruct the driver's vision as much as possible, and at the same time, they can reduce the direct sunlight on the eyes, which can help to alleviate the driver's fatigue to a certain extent.

When cleaning car glass, many car owners will see some small black spots on the edges and always want to clean them. Actually, it's not really the reason why you don't clean them, so it's designed that way. This little black dot is a craft and has a lot of features.

An adhesive that shields against UV rays and protects adhesion, especially when automotive glass is exposed to sunlight.

When cleaning car glass, many car owners will see some small black spots on the edges and always want to clean them. Actually, it's not really the reason why you don't clean them, so it's designed that way.

This little black dot is a craft and has a lot of features. An adhesive that shields against UV rays and protects adhesion, especially when automotive glass is exposed to sunlight. The diameter of these black dots is not easy, and the smaller the black dot near the center of the glass, the better the protection of the glass.

How to maintain car glass.

As one of the important components of automobiles, glass is often overlooked by car owners. In fact, clean and transparent glass is an important factor in driving comfort and safety. The following points should be paid attention to when repairing car glass:

1.Thoroughly removing dirt from car glass is the first step in maintaining car glass. It is a good choice to carefully choose cleaners and related cleaning products.

2.The defogging heating should be turned off after 5-10 minutes, otherwise it is easy to cause the rear windshield to burst. 3.

Do not wash your car for two days after changing the glass, and try to drive on a flat road. 4.If the wiper is not tightly connected to the glass, it is easy to produce scratches and affect the function, so be sure to maintain or replace it regularly.

5.Replace the tape regularly to prevent the tape from aging and leaking. When car glass is damaged, it needs to be repaired.

There are generally two ways to replace and repair automotive glass: replacement and repair. But once the glass is damaged, no matter how big or small, it will affect the structure.

If you only repair the glass, it may eventually break because the glass is exposed to air pressure both indoors and outdoors. Generally, the front windshield is pasted with heat insulation paper, and the safety of the car will be higher. If it breaks, the glass may crack like a spider's web, and no shards will rush out.

However, if the front insulating paper is not pasted, the glass in the cab will shatter, which will be quite dangerous. In severe cases, broken shards of glass ejected can hurt the eyes. Repairing glass is generally cheaper than replacing it, but it is less safe.

The owner of the car carefully considers. Generally, automotive glass repair can only repair cracks within 10 cm, and the traces may not disappear completely after repair. Even if the crack is not visible to the naked eye, the glass structure is damaged and cannot be improved by repair, and the safety factor is reduced.

Therefore, after maintenance, the owner must pay more attention to the safety of the glass to avoid personal danger.

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<> "What's the use of black dots on a car.

1. Beautiful. The black dots on the car glass have a magical function that is beautiful, and the small black dots have perfectly become excessive colors, so that the car will be much better in terms of overall visual sense.

On some models, due to the various electronic equipment. Flow** rearview mirror, rain sensor will have a certain sense of abruptness when installed on the glass alone, very incongruous, the appearance of black spots can just shield this sense of abruptness, and it is better in terms of visual experience.

2. Protective glass.

This is a little complicated, when the car glass is produced, the glass should be heated, and the appearance of black spots is to make this heat evenly distributed on the glass, otherwise it is easy to cause glass deformation and lose its original shape. Muffled beating.

Another point is that in the later use, the sunlight is constantly exposed to the glass, the heat absorption capacity of the glass is strong, the temperature rises quickly, and the overall thermal expansion coefficient is different. The surrounding glass will squeeze into the middle, and there is a high risk that the glass will be damaged. The black dots are also used to protect the glass by heating more evenly in the later stage.

Nowadays, almost all glass has black spots, you can pay attention to it when you look back.

Second, it's not just cars that have this design.

Since the black dot design is so powerful, it must have been applied elsewhere as well. Black dots can also be seen on the glass on the bus.

Its shadow can even be seen on high-speed trains

Three, but not all of them have black spots.

If you are careful enough, you will find a problem, you can see the glass with black spots on the front and rear windshields, why there are no black spots on the glass on the doors? Could it be that the glass on the door is not afraid of heat?

Of course, the glass on the door is sensitive to heat, and it can also be damaged due to this uneven heating. However, the biggest difference between the door glass and other glass is that the door glass has a large space, which means that there is a certain amount of redundancy. Both the front and rear windshields are fixed on the body, and there is no extra space to allow it to deform, so the requirements for the amount of deformation are extremely strict.

So you will find that the glass that cannot be opened and closed on the car has black spots, and the glass that can be opened and closed basically does not have black spots.

The black dots on the glass can block the sunlight and effectively reduce the damage to the windows from the outside world. The details are as follows: Black dots on the front windshield:

These little black dots are used to block out the sun. The dot matrix design of the small black dot can effectively block the sunlight and ensure the driver's good vision and safe driving at sunset or sunrise. Black dots on windows:

The glass is fixed by the surrounding glue, the metal body absorbs heat quickly, and the surrounding glass will expand with the heating of the window frame (sometimes up to dozens of degrees), and the glass in the middle of the noisy part has good light transmittance and fast heat dissipation, which will make the window form a contrast, and the window exposed to the sun is easy to **. These patterns made smaller by the Omori chain can effectively reduce the damage to the windows from the outside world in the case of cold winter and hot summer. When the pattern changes from large to small, they play an excessive role, dispersing the thermal expansion and reducing the pressure on the window.

Many drivers will find a small black dot on the glass of the car when driving, so what is this small black dot used for, the following is the origin of the specific elaboration for you. <>

First, protect the windows.

Everyone knows that the car glass and the body are glued together, but in the hot summer weather, after these cars and glass are exposed to the sun, the glue is very easy to melt, which will also cause the metal frame around the car glass to rise in temperature and expand. At this time, the effect of these small black dots is very large, he can absorb part of the sun's rays, prevent the glass from deforming or so on. In winter, the temperature inside the car is higher than the outside temperature, which will also cause the glass to crack, and the existence of small black dots has great significance.

Because the black heat absorbs heat quickly and dissipates heat quickly, it can quickly increase the temperature in the car, keep the temperature inside and outside the car balanced, and finally achieve the effect of protective glass. <>

Second, protect your sight.

Drivers will get tired after driving for a long time, because drivers will be exposed to direct sunlight for a long time, which will make their eyes feel tired. After setting up these small bucket belts with black dots, they can help the driver reduce a certain amount of direct light while not obstructing the driver's vision, so that the driver is less fatigued, and ensure the safety of driving. <>

Third, individual small black dots, there are some black technologies.

In the process of driving some vehicles, it is necessary to record the distance or situation traveled by the vehicle. This small black dot can be equipped with cameras or radars to help the vehicle have an accurate positioning during driving.

All in all, the role of small black dots on the glass can not be ignored, but there are also businesses that will cut corners and install inferior small black dots, which will make the function of small black dots greatly reduced, on the glass, if you can pick off these small black dots by hand, it means that your glass is an inferior product, you can find related car merchants to justify and protect their legitimate rights and interests. In short, the little black dot has a lot of effects, and I hope mine can help you.