Tempered glass

Tempered glass belongs to safety glass, which is heat treated or chemically toughened to increase its strength. Tempering heat treatment (that is, physical tempering) will compress the outer surface of the glass and cause the internal tension.

Tempered glass is four times stronger than "normal" or annealed glass. Unlike float glass, clear glass will break into jagged shapes when broken, while tempered glass will break into relatively harmless pieces. Therefore, tempered glass is often used in occasions required by public safety or building standards. Applications include architectural doors and windows, partitions, shower rooms and automotive glass, etc.

Bulletproof glass

Bulletproof glass is composed of multiple layers of laminated glass. The more layers, the stronger the ballistic performance of the glass and better protection. When weight reduction is required, laminate 3mm polycarbonate (thermoplastic) to the safe side to prevent peeling.

The glass used in bulletproof glass is transparent soft glass that has not been tempered, mainly due to its high elasticity, which can effectively increase the curvature of the glass when it is impacted, effectively reduce energy impact, and can effectively maintain it with the help of interlayer The integrity of the glass itself.

Tempered glass vs bulletproof glass

Tempered glass and bulletproof glass are not comparable. Because both belong to safety glass, tempered glass is processed on the basis of a single piece of glass, while bulletproof glass is a transparent material customized to improve ballistic performance. Tempered glass is due to industry standards. The material properties required to protect the human body after it is broken, so we need to recognize the difference between tempered glass and ordinary transparent glass.

The contrast between bulletproof glass and tempered glass in terms of safety is very obvious, because tempered glass can guarantee the safety under low-energy impact at the most laminated and monolithic level, while bulletproof glass under high-energy impact (ballistic impact) It can also ensure that the glass is not penetrated. The glass is intact, and the bullet hits the place will be broken and dented, but the last layer of glass remains intact or the back is raised, and there is no glass shards splashing (even splashing can not penetrate the test card)