How Bullet Proof Glass Works

bullet proof glassA bulletproof glass is a very different and complex type of glass compared to the ordinary types. A bullet resistant glass is made from multiple layers of sturdy glass that contain inter-layers of various plastics. At the first glass, a bulletproof glass looks ordinary to standard glass, but that is only where the similarities end.

Bulletproof glass is well-manufactured and engineered to withstand one to several rounds of bullets. It can resist these bullets depending on the thickness of the glass and the firepower of the weapon aiming at it. Different makers of this type of glass make various types of it. Basically, bulletproof glass is made by layering a polycarbonate material which is placed in between multiple pieces of standard glass in a process known as lamination.

The lamination process creates a glass-type material that is thicker than the ordinary one. Poly-carbonate is a very tough transparent plastic and makes an ideal choice for fitting in glass panels. A bullet resistant glass is generally between 7 mm and 75 mm in thickness. When a shot is fired at a victim covered under a sheet of bullet-resistant glass, it will pierce the outer layer of the glass. However, the layered poly-carbonate glass material absorbs the energy of the bullet and stops it before it can exit the final segment.

The thickness of the glass determines the ability and chances of a bulletproof glass stopping a bullet. A rifle bullet can collide with glass with a lot more force as compared to a shot from a short gun. This means that a more thick and stronger piece of bullet resistant glass should be used to stop a rifle bullet.

One Way Bullet Resistant Glass

Manufacturers also make one-way bullet resistant glass. With this type of glass, one side can stop bullets while the passenger’s side will allow bullets to pass through without strain. This type of glass gives a person being shot the ability to shoot back. To make a one-way bullet resistant glass, manufacturers laminate a brittle sheet of material using a flexible material.

The brittle material shatters around the point of impact and absorbs some energy across a large area. The flexible material then consumes the remaining power of the bullet to stop it. A bullet that is fired from inside the same car gets an easy access as it passes through the glass because the force of the bullet is concentrated over a minimum area.  This causes the material to flex, and bullet passes through to strike its target.

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