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The Spectra vs. Kevlar Discusion

May 23, 2008
Over the years, many improvements have been made in military and police garments to increase safety and create bullet proof body armor that is both comfortable and protective. However, in the past, being safe has meant a certain amount of bulk and discomfort, as well as added weight and mass for soldiers and officers facing combat on the battle fields and in urban wars. The use of Kevlar, a registered trademark of DuPont, has made body armor lighter and easier to work with, but flexibility has still been a problem.

Today, there is a new substance in use called Spectra, a composite material that is stronger, lighter, and more flexible than Kevlar, which is changing the face of bullet proof wear for our troops and police forces. What are the major differences between Kevlar and Spectra, and what are the big advantages of the latter?

If we examine the structure of the two we see that Kevlar is made from a high strength and high performance fiber who's properties are not yet entirely understood despite the fact that it has been used in bullet proof clothing for many years. A more or less exact description is difficult but you should try to see it is that the molecules form into sheets that then stack themselves around the center of a fiber like spokes. Stacking together several layers of Kevlar in a woven pattern creates the bullet proof material.

The woven material catches the bullets and the fibers break apart layer by layer and absorb the velocity. The bullets also get dulled and flattened when trying to penetrate the many different layers of the bullet proof material. This always has been a very effective method but nowadays the bullets are made of harder materials and they have a lot more velocity than in the past.

This means that Kevlar vests are stretched to capacity and sometimes even penetrated completely by these forceful weapons. The only answer with this material is to thicken the layers of weave, which make the material even bulkier, heavier, and less flexible.

Since Spectra is a completely new and different technology , there is no need for layers due to the fact that Spectra is not a woven fabric. It is about 40% more lighter than Kevlar which makes it very useful for comfortable bullet proof vests
About the Author
If you want to know more about Kevlar and Spectra make sure to visit our websites : Navajas | Linternas | Relojes Militares and Ropa Urbana | Ropa de Calle | Ropa Extrema
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