A windshield is the most important part of your vehicle’s safety system. It keeps you and your passengers safe in case of an accident, but it also helps protect you against other types of dangers like heavy winds or even small stones that could cause damage if they hit your car and break through the glass. The way a windshield works is pretty simple: it consists of three layers that are sandwiched together with polyvinyl butyral (PVB) in between to hold everything together. Let’s take a look at each layer so we can better understand how they work together to keep us safe!
How Did Automotive Glass Evolve?
A century ago cars didn’t have windshields or windows, and drivers had to wear goggles to protect their eyes from the wind or insects. Soon after, windshields were invented to solve this inconvenience; however, the windshield was made of ordinary glass. If you can guess why this was a problem, you’re right!
Early windshields shattered into large, sharp pieces just like your windows would if hit with a baseball. The shards of glass could fly at high speeds toward the driver and passengers in the car, causing many injuries and prompting manufacturers to develop a solution.
For example, laminated glass has been used in automobiles since the 1920s. Instead of shattering when something hits the windshield, a chip or crack will form in the outer layer of the windshield. Although the windshield sometimes needs to be repaired or replaced, it is still a much more safe, more durable, and more cost-effective option than ordinary glass.
Despite these advantages, laminated glass is not used for every window in your car. A vehicle accident could shatter the windows not covered with laminated glass.
In the event of a car accident, tempered glass is ideal for use in side and rear windows. If a car falls into a river, for example, the passengers can escape by breaking the glass. Laminated glass, however, is nearly shatter-proof. Therefore, if all other exits are blocked and the car goes into a river, passengers may not be able to escape and could sustain serious injury.
Three main layers of a windshield
The three main layers of a windshield are the outer layer, the PVB layer, and the inner core. The outer layer is typically made of polyvinyl butyral (PVB) while the inner core is made of a soft pliable material like polyurethane foam or rubber. The PVB layer helps hold these two parts together if they get hit by something that can cause damage to your car’s windshield. This also makes sure that in an accident, you won’t get any pieces of glass flying through your car and injuring someone inside it.
The laminate is also known as the interlayer because its job is to separate both parts so they don’t touch each other until they come into contact with one another when something large enough hits them hard enough to break through all three layers at once
The outer layers of glass:
The outer layers of glass are glued together with the PVB layer in between. The PVB (polyvinyl butyral) helps hold the windshield together if it gets hit by something, making it stronger than regular glass.
In order to bond the layers together and create structural strength, there must be a chemical reaction that occurs when you use an adhesive (glue). This reaction happens when you apply pressure to both surfaces of your windshield while heating them up with hot air.
The PVB helps hold the windshield together if it gets hit by something. It’s used to glue pieces of glass together, which means that when you hit something with your car, the windshield will not shatter into many pieces like a normal window would. The PVB is often made from some kind of synthetic material, so it can be molded into different shapes and sizes depending on what you need it for. Sometimes people also use a type of rubber called silicone instead of plastic because they think this makes them safer in case their windshield breaks–but no one knows whether or not this is true!
There are three main layers of a windshield: the outer layers of glass are glued together with the PVB layer in between. The PVB helps hold the windshield together if it gets hit by something and will prevent cracks from happening. This means it can be handled without worrying about breaking apart when being handled or transported around different areas of your car’s bodywork.
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