If you are on the front line in combat, if you are in the danger zone, and the bullets are being thrown from all directions, you need all the help you can get. No one can move fast enough to escape from a sniper bullet, or even see it coming. There is only one way to protect yourself: by placing a barrier in front of your body to dissipate the energy of a bullet. This is the basic idea behind bulletproof glass: Bulletproof glass was only discovered by accident in the mid-17th century. Prince Rupert's Drops originated in England by putting molten glass in cold water, making glass almost indestructible. In 1903, Edouard Benedictus, a French chemist, accidentally dropped a flask on the floor. The bottle broke but did not break, as the bottle held the liquid nitrate solution, which covered the glass with a plastic sheet. That year was marked as the starting point for bulletproof glass R&D (Research and Development).
Bulletproof glass is very different from ordinary glass. More accurately called bullet resistant glass (because no glass is completely bulletproof), it is made of multiple layers of hard glass with "interlayers" of PVB. Sometimes there is a final inner layer of polycarbonate (a type of rigid plastic) or plastic film (dangerous glass or plastic fragmentation by the impact of a bullet) to prevent "fringes". This layer sandwich is called laminate. It can be ten times thicker than a single ordinary glass pane and is generally very heavy.
When a bullet hits ballistic glass, its energy spreads sideways between layers. Energy is quickly absorbed as it is split between a number of different pieces of glass and plastic and spread over a wide area. The bullet slows down so much that it no longer has enough energy to pierce or deal too much damage if it pierces through. Even though the glass plates break, the plastic layers keep them flying away. If we think of bulletproof glass as "energy absorbing" glass, you will have a better idea of how it works.
Ballistic glasses are classified according to their resistance to the impact force of lead from NIJ, NATO STANAG, VPAM and ISO EN worldwide. These are BR1, BR2, BR3, BR4, BR5, BR6 and BR7 for ISO EN 1063 European Standard.
As Asimgard Defense Systems, we can produce according to the size, size and standard class suitable for your projects. Our glasses classified according to the standards can be used in our ballistic doors, bullet proof windows and ballistic security huts.