Have you ever asked yourself why windshields are more expensive than any other car glass, or why windows don’t get shattered?
In this article, we will answer this question and get deeper into the differences between Laminated and Tempered car glass.
Laminated Glass History
Laminated glass is a type of safety glass that consists of two or more panes of glass bonded together with a layer of plastic.
It was invented in 1903 by the French chemist Édouard Bénédictus and is often used in car windshields and skylights.
Laminated glass is strong and durable, and is less likely to shatter than ordinary glass. In the event of a breakage, the plastic layer helps to hold the glass together, preventing it from shattering into dangerous shards.
Laminated glass is also resistant to UV radiation, making it ideal for windows that receive direct sunlight. Thanks to its many benefits, laminated glass is an increasingly popular choice for commercial and residential applications.
Laminated Glass Construction
The process of bonding two sheets of ordinary (annealed) or tempered glass with pressure and heat results in safety glasses. The interlayer is typically made from a plastic such as polyvinyl butyral (PVB) or ethylene-vinyl acetate (EVA). A rigid plastic filling makes up for their lack of durability, but they are much more resistant to breaking than standard window panes!
Usually, the glass sheets are 2.5 mm thick each and there’s also an extra 0.38 millimeter of laminate that goes on top which you might overlook unless it breaks or gets chipped away from something else first – this makes your car windows 6 mils (or 5/8″) strong!
James Bond’s car, the Aston Martin DB5 in Goldfinger had bulletproof glass windows. It consisted of laminated sheets with polycarbonate layers that were used to keep out bullets and other dangerous obstacles from escaping through them during a chase scene involving Le Chiffre ( chloride-based chemical).
The BAC/SAF Concorde aircraft windshields featured seven plies — four glass and three PVB—giving it an overall thickness of 38 mm; however recent Airlines such as the Boeing 787 have less protective materials making them lighter but still delivering safety benefits by using more advanced technologies
Laminated Glass Advantages
Though laminated glass cracks easier than tempered, it will still resist breakage when hit with a force. The interlayer is designed to distribute impact over an area so even large objects have less chance of entering your cabin in case something does happen!
- Is made of two or more layers of glass bonded together by a layer of plastic in between
- Better Security: Can be repaired if damaged, as the plastic layer prevents the glass from shattering
- Laminated glass is much less likely to shatter on impact and will thus prevent you from falling out in an accident.
- Has better acoustic insulation properties
- Is more durable than tempered glass and can withstand higher impact forces
Tempered Glass History
Tempered or toughened glass is a type of safety glass processed by controlled thermal or chemical treatments to increase its strength compared with normal glass.
Francois Barthelemy Alfred Royer de la Bastie is credited with developing the first method of tempering glass in 1830. The process of tempering glass involves heating the glass to a high temperature and then cooling it quickly. This strengthens the glass and makes it less likely to break.
It is usually used in applications where regular glass would pose a safety hazard, such as car windows, and shower doors, and stronger than annealed glass of the same thickness.
The tempered glass breaks into small, relatively harmless pieces rather than large shards when it fails. The strength of tempered glass also makes it more resistant to thermal stress and prevents “spontaneous breakage” as the result of minor surface damage that can occur over time with annealed glass.
However, tempered glass cannot be cut or drilled after it has been tempered, so any fabrication must be done before the tempering process. Tempering also increases the cost of the glass.
Tempered Glass Construction
Before being cut and assembled into products, glass must be tempered to ensure its safety. The manufacturing process of tempered glass begins with the strengthening of a sheet of glass through rapid cooling. The glass is cooled from 600 to 300 degrees Celsius in a few seconds, which compresses the outer surfaces and tensions the inner surface.
As a result, the glass shatters into harmless chunks instead of sharp shards. This process makes tempered glass four times more robust than regular annealed glass, as well as more durable and heat-resistant.
Consequently, manufacturers must temper glass to create products that are safe for consumers to use.
Tempered Glass Advantages
AThe invention of this new type of glass has been a lifesaver for those who have found themselves in car accidents with sharp, shattered windows. The impact from an intact windshield would have been fatal but now you can safely get out and call upon our emergency services!
Tempered glass is a lot safer than laminated windows. Tempering helps prevent breakage and enhances safety, especially in case of an accident where it could save your life or that of someone else!
Mostly, vehicle windows are tempered and are available in the tinted format.
Tempered glass is an affordable and lightweight alternative to laminated safety windshields.
It is non-repairable when shatters, and requires a complete replacement.