Why is the front windshield made of laminated glass?

First, let's understand what laminated glass is. Laminated glass is a layer of PVB film sandwiched between two layers of glass, and its biggest function is explosion-proof.

Because the driver is sitting behind the windshield, if the glass is suddenly exploded by impact, it will definitely hit the driver's head and cause serious injuries. For safety reasons, no matter how cheap the vehicle is, the front windshield must be explosion-proof, and laminated glass can do this. Explosion-proof does not mean that it will not break, but that it will not shatter after being damaged, and will not shatter into glass shards like tempered glass.

We have seen some accident vehicles where the windshield was pierced by foreign objects and had a big hole, with large cracks all around, but it was just a hole, and the glass was still intact and did not fall off. Because after it broke, it would still stick to the PVB film, so that the glass would maintain basic integrity, and even if it fell off, it would fall off in large pieces. There would be no small glass shards flying around, thus greatly reducing the risk of causing serious injuries to people in the vehicle.

In addition, laminated glass has higher strength and impact resistance, and can better withstand the impact of wind pressure, stones and other foreign objects during driving. Ordinary small stones hitting the glass will not damage the windshield. This also saves maintenance costs and avoids the need to replace glass frequently. At the same time, it can also provide drivers with a clear view, making driving safer.

Some high-end models also use laminated glass for their windows to improve sound insulation and heat insulation and highlight the overall luxury of the vehicle. However, more vehicles do not use laminated glass for their windows, but tempered glass. One important reason is to save costs. The manufacturing process of laminated glass is relatively complex, the material cost is also high, and the price is more expensive.

The difference in functional requirements is also one of the reasons. The main function of vehicle window glass is to provide vision and ventilation, and it does not need to withstand the huge pressure of wind, so the safety performance requirements are lower than those of the front windshield. Even if it breaks, the damage to the people will not be so serious because the area of the glass is small.

In addition, design and aesthetics are also taken into consideration. The shapes and sizes of vehicle window glass are quite diverse, and the use of tempered glass can more easily meet various complex design requirements without requiring high technology, while also maintaining good appearance flatness and transparency.

Will laminated glass affect your escape? If you don't have any tools, it will definitely affect your escape, after all, laminated glass is stronger and it is not easy to break it. But if you have tools, such as a safety escape hammer or other sharp tools that can smash, it will not affect your escape. No matter what kind of glass, an escape hammer can easily break it, and it will not have much impact on the escape time.