Why is Kevlar used in bulletproof vests?

Kevlar is a very strong polymer fiber that is used to augment or serve as bullet-resistant material. While Kevlar material is strong and used in bulletproof vests, it is a common misconception that the material itself is completely bulletproof. StrengthKevlar thread has a tensile strength of 35 pounds, which is more than double the amount that nylon thread has.

Weaving it together with other Kevlar threads creates a much stronger material that prevents injury from shrapnel and less-powerful bullets. WeightBulletproof vests use a combination of metal or polymer plating and Kevlar. Because Kevlar can withstand a fair amount of damage, plates do not need to be as thick or heavy to make the vest bulletproof.

DurabilityKevlar vests are tested by firing six shots at the vest. Each bullet should leave a dent no deeper than 1.7 inches and should not penetrate into the test mannequin. Kevlar vests are also heat resistant up to 800 degrees Fahrenheit, and resistant to mild corrosives.

CostWhile ... more.

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