Bulletproof glass is a composite material specially processed from glass (or plexiglass) and high-quality engineering plastics. It is usually a transparent material, such as PVB/polycarbonate thermoplastic (generally lexan resin) Also called LEXAN PC RESIN). It has the appearance of ordinary glass and the act of transmitting light, which provides certain protection for the shooting of small arms. The thickest pc board can be 136 mm thick, the maximum width is 2166 mm wide, and the effective time is up to 6664 days.
Classic case
On the night of February 9, 1998, Georgian President Shevardnadze was on his way home from a Mercedes-Benz car. Suddenly, he shot more than 20 killers from the jungle under the night, and fired and threw grenades at the presidential car. The car is scarred, but fortunately Shevard Naze is unscathed! What protects the president from the disaster? This is thanks to the $500,000 Mercedes-Benz bulletproof car that the German government gave him. So why is the bulletproof car bulletproof? It turned out that it installed a safety glass - bulletproof glass. The safety glass is made of a tough plastic inner layer (pc/PVB) which is affixed under a certain temperature and pressure. The thickness of the interlayer pc is generally 0.5mm-5mm. Also called laminated glass or glued glass, the plastic is inside. The layer absorbs some of the energy and shock wave pressure generated during the impact and explosion process, and will not spatter even if it is shattered. Laminated glass can be made of ordinary glass, tempered glass, heat-reinforced glass according to different needs, or can be made into insulating glass. Safety glass has good safety, impact resistance and penetration resistance, and has anti-theft, bulletproof and explosion-proof functions.
Functional analysis
Bulletproof glass produced by different manufacturers varies. Basically, however, a layer of polycarbonate material is sandwiched between ordinary glass layers, a process called lamination. In this process, a substance similar to ordinary glass but thicker than ordinary glass is formed. Polycarbonate is a hard, transparent plastic – people usually refer to it by its brand (Lexan, Tuffak or Cyrolon). The bulletproof glass has a thickness between 7 mm and 75 mm. A bullet that hits the bulletproof glass will break through the outer glass, but the polycarbonate glass layer absorbs the energy of the bullet, preventing it from penetrating the inner layer of the glass. These large pieces of bulletproof glass have been used for public purposes during the Second World War, usually as thick as 10.0 cm to 12.0 cm, and are extremely heavy.
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