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?
Let's first examine the structure of each of the two materials. Kevlar is a high strength, high performance fiber that, despite its many years of use in bullet proof clothing, is still not entirely understood. The best description of how it is believed to function is that the molecules form into sheets that then stack themselves around the center of a fiber like spokes. The idea behind using this as a bullet proof material was to stack several layers of the material together in a weave pattern.
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.
Spectra is a completely new and different technology. Spectra is about 40% lighter than Kevlar which makes it a lot more comfortable. Spectra is not been woven which only helps reducing even more the weight and bulk as there is no need for several layers. - 16003
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?
Let's first examine the structure of each of the two materials. Kevlar is a high strength, high performance fiber that, despite its many years of use in bullet proof clothing, is still not entirely understood. The best description of how it is believed to function is that the molecules form into sheets that then stack themselves around the center of a fiber like spokes. The idea behind using this as a bullet proof material was to stack several layers of the material together in a weave pattern.
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.
Spectra is a completely new and different technology. Spectra is about 40% lighter than Kevlar which makes it a lot more comfortable. Spectra is not been woven which only helps reducing even more the weight and bulk as there is no need for several layers. - 16003
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