The Mechanisms That Make Bullet Proof Glass Work

Transparent armor, ballistic glass, and bullet-resistant glass are just some of the terms that are used to pertain to bullet proof glass

. If you simply look at it, you will not find anything special about it. But if you fire a round onto it you will see how special it is. However, it is not totally impervious.

Several layers of alternating tempered glass and plastic make up the transparent armor. Transparent polycarbonate is usually the chosen material in the manufacture of which. The layers are glued on top of each other in the process that is called lamination. Basically, thicker layers are more effective at stopping higher powered ammo. Transparency is quite harder to obtain if more layers are put it. Also, image distortion is probable with more layers.

Tempering is done by exposing it to extremely high temperatures then rapidly cooling it. This renders it four to fives times stronger than the regular ones. This process also results to uniform molecules that shatters into smaller and rounded pieces. This is also ideal as injuries due to broken shards are prevented.

Polycarbonate is a kind of plastic that is flexible and resilient. The chains that make up polycarbonate are elastic while the bonds among the molecules are very strong. When hit, it is pliable but the strong bonds do not allow it to break. This type of plastic is also light and thin. Thus using this, makes the transparent armor lighter and thinner but more expensive.

Each material has its own function. Glass absorbs the energy of the round and at the same time, it is plastic that disperses that energy. As more and more layers are penetrated by the round, more and more energy is lost and dispersed until finally it can no longer continue and it stops before hitting the target. In addition to diffusing the energy, plastic also prevent the flight of the glasses.

There are also one way transparent armors that will let defensive shots get out but will prevent offensive shots from getting in. Two types of materials are needed to make this possible. A brittle one for the outer layer and a flexible one for the inner layer.

A round fired to target inside the armor loses energy as it hits the breakable layer. This energy loss renders the bullet stoppable by the flexible layers. However, ammo that hits the flexible layer first contains all its energy until it reaches the breakable part which yields to it. Thus allowing the bullet to get out without loss to its momentum.

More and more people and industries are now using this material. Jewelry stores, banks and civilians are also using this now. Previously it was only those who go into battle use such thing. Vehicles used to carry important people are used with this material.

Bullet proof glass although able to stop bullets are not totally resilient. Its main function is to stall an attacker so that appropriate adjustments as to defense can be made. However, with continued advancements in technology maybe one day scientists will make a material that is indeed bullet proof.

by: Tracy Narvaez

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