2006-09-23 05:19:55 · 7 answers · asked by chameleon509 1 in Politics & Government ➔ Law Enforcement & Police
A kevlar vest will degrade over time. So I was wondering if a kevlar helmet would also?
2006-09-23 05:25:12 · update #1
Yes. They generally expire after the same 5 year time frame that kevlar vests do.
2006-09-23 05:28:19 · answer #1 · answered by dh1977 7 · 0⤊ 1⤋
Kevlar is a very strong fire-resistant fiber. It is spun in the same way that a spider web is spun. The fibers do not rust or corrode and it's strength is not affected by water. Unless specially bulletproofed, Kevlar's ability to stop bullets and other projectiles is degraded when wet. Kevlar, though strong, is flexible and the fibers will part slightly over time by normal wear causing kevlar to lose its original protective properties. It is recommended that kevlar goods which are "bullet proofed" while being manufactured be replaced at least every 5 years. There are different grades of kevlar used in many different applications. If the helmet you are talking about is a construction or emergency response helmet check with Kevlar for details and suggested longevity.
2006-09-23 06:30:57 · answer #2 · answered by okchico 3 · 0⤊ 0⤋
You better hope not. Kevlar is now being used in auto tires for the tread belts, which some people may run use ten years or more.
Keep in mind that there is no such thing as a bullet-PROOF helmet or vest. They are bullet-RESISTANT and WILL be penetrated by rifle fire in many cases. Many bullet resistant vests are being made from materials other than Kevlar, because Kevlar is heavy.
2006-09-23 05:29:10 · answer #3 · answered by senior citizen 5 · 0⤊ 0⤋
yes they do and most are recycled every five year like vests are.
( now 5 year is merley a safe protective number, actual use could be 10 years of more, but a large safety factor is build in.
Also the treatment is also part of the issue. And if one is ever "used" it should always be replaced
2006-09-23 13:22:52 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Yes.
It should have a suggested replacement date with the packaging. It will not be as bad as the vest, because the movement is part of what degrades it.
2006-09-23 06:03:39 · answer #5 · answered by tnmack 3 · 0⤊ 0⤋
If you are an officer of the law it is your duty to test this theory to destruction.
2006-09-23 05:23:37 · answer #6 · answered by Anonymous · 0⤊ 2⤋
no. why would it?
2006-09-23 05:21:23 · answer #7 · answered by Al Bundy 4 · 0⤊ 0⤋