Bulletproof Vests Also Have A Shelf Life?

- Jul 17, 2019-

With the technology of muskets improving, armor seems to be becoming increasingly useless.

But after the 20th century, armor was reborn, transformed into body armor, and once again became amulets for soldiers. In 1901, U.S. President John McKinley was assassinated. This matter has attracted the attention of military personnel, why not design a bullet-proof armor?

Early body armor came into effect. In both world wars, most of the soldiers' casualties came not from bullets, but from flying shrapnel. Helmets and body armor can undoubtedly save a significant number of soldiers' lives. Before the 1940s, countries such as britain and the United States developed bulletproof vests that used steel plates and fabrics to resist pistol rounds at close range. But if you change to a fast, high-quality rifle bullet, it's hard to ignore it. Still, experts see the future of bulletproof vests. The most important driving force behind the advancement of body armor technology comes from the development of materials. In 1945, the U.S. military began equipping the M12 infantry body armor, which uses aluminum alloy and high-strength nylon, not only to weigh lighter than steel body armor, but also to be more bulletproof. During the Korean War, the U.S. military began using all-nylon body armor. In the 1970s, DuPont developed a high-strength, high-temperature-resistant synthetic fiber, Kefra. The invention was immediately applied to body armor.

The application of ceramic composites has greatly improved the technology of body armor From the material point of view, bulletproof clothing can be divided into soft, hard and hard complex three.

The first generation of bulletproof clothing is a hard body body armor, to special steel plate, super aluminum alloy and other metal materials or alumina, silicon carbide and other hard non-metallic materials as the main bulletproof material, the resulting body armor generally does not have softness. The second generation of soft body armor with high-performance textile fibers as the main material.

These high-performance fibers are much higher than the energy absorption capacity of ordinary materials, giving bulletproof clothing bulletproof function, and because this body armor generally uses a textile structure, and therefore has a considerable softness, called soft body armor. The third generation of body armor is a composite body armor. Usually with light ceramic sheet as the outer layer, Kevlar and other high-performance fabrics as the inner layer, is the main development direction of bulletproof clothing.