[China Glass Net] The components of the car except the metal body are the largest area of ​​glass, especially the front windshield, on the realization of the problem. Speaking of glass, I think of fragile products, what kind of glass heart, when you hold, you are a cup, when you let go, you are the words such as glass slag and so on, it is always careful to care. Although the glass quality of the car is not fragile enough to break in minutes, it is not uncommon for the glass to be damaged when the vehicle is in use. When there is a crack in the glass, some riders save money and save money, while some owners change it. So when does the glass need to be repaired? When should I replace it?
The difference between the front windshield and the window glass
If you watch TV series and movies regularly, you will find that the glass of the car is different. The front windshield, like an impact, mostly has a spider web, while the window glass can become a fragment. It is also true that automotive glass atmospheres are laminated glass and tempered glass. Laminated glass is a layer of PVB film between the two layers of glass that does not break completely in the event of damage. Even in the event of a severe impact, the glass does not fall off, remains relatively intact, and there is no debris splashing, so laminated glass is mainly used on the front windshield of automobiles. When the tempered glass is damaged, it will quickly diffuse into numerous small particles, and it is easy to fall off. It can be easily escaped in a critical situation. Therefore, tempered glass is widely used in the rear windshield and the door and window glass.
As can be seen from the above, once the tempered glass is broken, it is difficult to repair, and the laminated glass is relatively repairable by a certain process.
Repair or replace?
Most of the damage to the front windshield under normal conditions is caused by small stones when driving at high speed. After the impact, there will be a damage point on the glass similar to the bull's eye. At this time, if the whole piece of glass is removed, it is a bit of a local tyrant, but measures should be taken as soon as possible to prevent the crack from expanding. Generally speaking, it can be repaired without a long crack within 3 cm in diameter. As for the specific situation, it is still necessary for the glass repairing master to judge.
Can the glass be polished?
In addition to being hit by pebbles, scratches on the car's glass are also common. Generally, the window and rear windshield can be repaired by polishing. Of course, the repair depends on the depth of the scratch. Unlike the rear windshield, the front windshield repair needs to distinguish the repair process based on whether it is in the main viewing zone. The non-main view area can be polished with glass paste and special pneumatic tools (except for hard or deep scratches); polishing is not recommended for the main viewing area, and the curvature and thickness of the polished glass will be slightly changed to easily cause optical distortion. Affect safety.
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