After the vest has been tested, it is placed in an archive so that in the future vests with the same model number can be easily checked against the prototype. Rigged field testing is not feasible for bullet-proof vests, but in a sense, wearers such as police officers test them everyday.
Studies of wounded police officers have shown that bulletproof vests save hundreds of lives each year. Tarassuk, Leonid and Claude Blair, eds. The Complete Encyclopedia of Arms and Weapons. Simon and Schuster, Anderson, Jack and Dale Van Atta. April 9, , p.
Chapnick, Howard. November , pp. Faison, Seth, Jr. September 15, , p. Flanagan, William G. July 6, , p. Lappen, Alyssa A. February 6, , pp. Toggle navigation. Kevlar has long been the most widely used material in bulletproof vests. To make Kevlar, the polymer solution is first produced.
The resulting liquid is then extruded from a spinneret, cooled with water, stretched on rollers, and wound into cloth. A recent competitor to Kevlar is Spectra Shield. Unlike Kevlar, Spectra Shield is not woven but rather spun into fibers that are then laid parallel to each other. The fibers are coated with resin and layered to form the cloth. After the cloth is made, it must be cut into the proper pattern pieces.
These pieces are then sewn together with accessories such as straps to form the finished vest. Other articles you might like:.
User Contributions: 1. I would like to know if someone knows about this type of project. I can design but I would like to know better the materials that I have to use when I make the vest.
An were I can buy it or find it what store. Thank you in advance. Violeta McClellan. Comment about this article, ask questions, or add new information about this topic: Name:. E-mail: Show my email publicly.
Kevlar is a chemical compuned polyparaphenylene terepthalamide which belongs to the class aromatic polyamide is a para-aramid synthetic fibre. Aramides belong to class of nylons. The aramide ring and the para structure is what gives kevlar its high strength and thermal stability. Kevlar is a very strong synthetic fiber that can be spun into cloth to make body armor.
The marketable vest was crafted from 15 layers of Kevlar cloth and could stop most bullets from common street guns like the 0. The vest was a hit with law enforcement because of its light weight, strength, and ability to wear it under clothes. The Kevlar vest has saved thousands of lives since its invention.
There were a number of other attempts from on including vests made for many layers of cotton, silk and pressed steel plates. Kevlar is the registered trademark for a para-aramid synthetic fiber, related to other aramids such as Nomex and Technora. Developed at DuPont in , this high strength material was first commercially used in the early s as a replacement for steel in racing tires.
Typically it is spun into ropes or fabric sheets that can be used as such or as an ingredient in composite material components. If anything the amount of armor soldiers wore was reduced. As sometimes happens in the arms and armor race, weapons technologically had far outpaced armor technology. Kevlar can protect against a thermal hazard of up to degrees Fahrenheit , making it ideal for personal protective equipment that is necessary in manufacturing environments where heat be a hazard.
As a fibrous material, Kevlar enables manufacturers to create products that are flexible, yet strong. Kevlar is ideal for clothing applications, since it can be cut and sized into shapes that are form-fitting. As such, Kevlar is perfect for gloves, protective coats, and more. Kevlar is an ideal body armor material, since its fibers are incredibly difficult to break again, thanks to its tensile strength. The linked chain fibers of Kevlar absorb high-velocity impacts, instead of enabling a ballistic to penetrate the material.
This feature makes Kevlar ideal for military and police applications, including body armor and vests. DuPont currently produces a variety of types of Kevlar, including XP and XD Kevlar, which are specifically designed for use as a ballistics material. These materials have even greater strength against ballistics, and the material can be layered and configured as desired to enhance its protective qualities, weight, or flexibility. Kevlar cannot be easily cut or punctured, due to the chain links that form the fibers of this material.
That means even more protection for police and military applications. In addition, it makes Kevlar the ideal material for a variety of gloves, where workers handle sharp objects. This chemical is made from creating a chemical reaction between an acid and a chemical solution containing nitrogen and hydrogen.
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