Forums / Off Topic / kevlar expiration

6 years 36 weeks ago, 2:19 PM

Reaper308

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kevlar expiration

I've got a couple ABA level IIIA vests that are about 5 years old. I think the warranty just expired. I've read that kevlar will continue to be bullet resistant for quite some time, but has an expiration. Will it eventually get downgraded to level III, then IIA, then II and so on, until it it useless? Anyone have any experience with this?

"Proelium Comminus Auctoritate" "Sometimes the light at the end of the tunnel is a muzzle flash."
5 years 16 weeks ago, 4:05 PM

Reaper308

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hello, hello, hello

is there anybody out there???

Since you jokers still haven't answered my question... I now have some 6 year old vests. I need someone with kevlar testing experience. I see that TXLUCKYGUY is logged in... TX, do you guys ever test old body armor?

"Proelium Comminus Auctoritate" "Sometimes the light at the end of the tunnel is a muzzle flash."
5 years 16 weeks ago, 6:16 PM

Ishootdaily

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Reaper

I can ask Felix about it this weekend if you like. He provides vests to a few agencies in the Tampa Bay area and would know. I do know that the 3 - 5 year limit for the LEO's changing them out is based on the fact that they are worn daily and over time the fibers can loosen up a bit. Though I'm sure he can give me the actual life span of a vest that hasn't been shot.

No sir, he fell into that bullet... Never argue with a stupid person. They'll just drag you down to their level and beat you with experience!!
5 years 16 weeks ago, 7:48 AM

runawaygun762

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Vests have expirations because the fibers can wear and loosen, as ishoot said. Salt crystals from sweat can abrade the fibers, improper storage, washing with the ballistic panels still in, all of it will reduce the effectiveness over time. If you want to make sure the vest performs to its listed rating, follow the manufacturer's directions for care and replacement.

No matter how old or worn the vest is, it will provide protection. The more material between you and a bullet, the less likely the bullet is to hit you. My plan is to just not get shot, but I have a few level 3A vests just in case. I'm also working on getting some ESAPI plates, but it's not cheap.

"I have always been a soldier. I have known no other life. The calling of arms, I have followed from boyhood. I have never sought another." From The Virtues of War, by Steven Pressfield.
5 years 16 weeks ago, 12:47 PM

Reaper308

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runaway

thanks for telling me everything I already knew.... try answering the question or atleast providing some useful info next time. Atleast ISD is going to try to find some info out. You should just stick to "K9 handling" over at Nitris'

"Proelium Comminus Auctoritate" "Sometimes the light at the end of the tunnel is a muzzle flash."
5 years 15 weeks ago, 6:21 AM

Nitris

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raper

Reaper308 wrote:
thanks for telling me everything I already knew.... try answering the question or atleast providing some useful info next time. Atleast ISD is going to try to find some info out. You should just stick to "K9 handling" over at Nitris'

raper, in all honesty you do expect to get a serious answer from hastheruns. I mean come on, look who you're talking about. Did you actually expect to get a rational reasoning from an individual to which has no qualifications in any field except raping dogs.

Ron Paul 2012 III
5 years 15 weeks ago, 6:00 AM

runawaygun762

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Holy shit, raper

Your question has been answered. Yes, the vest will continue to lose effectiveness, no it will never be useless. If you have SOME six year-old vests, then shoot one. Granted, this won't really help, as vests wear out differently depending on how long/often they're worn and how they're cared for (You already knew this but are asking the question anyway. Homo), so even if one vest lives up to its rating, that's not saying another vest of the same manufacturer will.

What part of your question hasn't been answered? Goddamn desert rats, I swear.

"I have always been a soldier. I have known no other life. The calling of arms, I have followed from boyhood. I have never sought another." From The Virtues of War, by Steven Pressfield.
5 years 15 weeks ago, 7:42 AM

TXLUCKYGUY

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armor

I routinely shoot used/"expired" soft armor panels. I've shot well-used, improperly stored Level II panels from 1993, and they still stop the rounds they were designed to stop.

Mind you, I do not have a "lab", nor do I have the $$ to buy 80lbs of clay a la FBI, nor do I have the $$/patience/facilities to mix up ballistics gel as per DocGKR (for backface deformation measurements).

My shoots are typically just wrapping a panel loosely around a plastic jug or tub of water, recording the number of layers penetrated, a go/no-go penetration, and recovery/measurement of the bullet.

Reaper ,I'd look closely to make sure that your vests are indeed 100% aramid (Kevlar/Twaron).....most vests offered in the last 10yrs or so are some sort of laminate or amalgam using aramid fibers as well as other synthetics. Stuff like Spectra can degrade VERY rapidly when exposed to heat (trunk of a car in southern Arizona, lying on the pavement in TX in August) and cannot be rightly compared to aramids. If you're familiar with Zylon (thankfully relegated to the past) it can degrade appreciably under sunlight in just a few days.

If a vest of any material is subjected to very heavy use (moisture, humidity, flexion, torsion, erosion), it may degrade past NIJ certs during the 5-year "warranty" period most manufacturers have.

Based on my limited experience, I can't imagine any current NIJ/FBI cert'd armor panel becoming completely "useless" within 5-10 yrs unless is it cut, penetrated or otherwise damaged.

Keep in mind that the blanket "this here'll stop a .44 Magnum" pitch is useless, since several types of rounds within caliber may defeat a vest, where the NIJ/FBI-spec'd test cartridge will not.

5 years 15 weeks ago, 7:47 AM

runawaygun762

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Just worded better. With more information. Presented in a more coherent manner. And more useful.

Go fuck yourself, nitris.

Sorry, it's my fallback.

"I have always been a soldier. I have known no other life. The calling of arms, I have followed from boyhood. I have never sought another." From The Virtues of War, by Steven Pressfield.
5 years 14 weeks ago, 4:56 PM

Nitris

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Go suck a horses

Go suck a horses ass..............wait didn't you and equeer do that last night........I get so tired of you calling late at night, crying because my dog left you..........

Ron Paul 2012 III

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