How do bulletproof vests work? - Max G. Levy
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- Опубликовано: 26 окт 2024
- Explore the chemistry behind what makes kevlar so strong, and how this essential synthetic fiber was invented.
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By 1975, Richard Davis had been shot at close range 192 times. But not only was he completely healthy, each of those bullets were part of a demonstration to sell his new product: the bulletproof vest. So, how does such a light, flexible piece of clothing stop a bullet? The secret was a synthetic fiber material invented a decade earlier. Max G. Levy explores the incredible strength of kevlar.
Lesson by Max G. Levy, directed by Vitalii Nebelskyi, and action creative agency.
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Very important note: Kevlar is a brandname owned by DuPont. The actual material is Aramid.
I feel like it's a sorta kleenex/band-aid/tupperware thing where the actual item is called something different but its so associated with that one brand everyone just calls all items of that type the brand's name y'know?
All Kevlar is an Aramid, but not all Aramids are Kevlar.
While not rated for blades, kevlar vests are pretty darn resistant to blades.
Read this as “while not rated for babies”
So, bulletproof kevlar vests can prevent a knife from piercing our body?
@@containedhurricane The knife will most likely make it through to your body, but only the tip. Still, it'll ruin your armor.
@@containedhurricane I remember watching an experiment about this, and the answer is yes. Although there might be a small cut, but you will be fine.
However, if it is a long sewing needle, then you will get pierce pretty badly. The needle can pass the tiny gap between fibers pretty easily.
@@containedhurricane It will work wonderfully against slashes, but thrusts and piercings being stopped will depend on how thick the vest is.
As someone who worked in private security before, i can attest that sometimes a Level III bulletproof vest is often a lifesaver. Not just to protect one self but guarantee that'll be home on the next day and so forth. Sure the weight can be cumbersome but after awile, you'll get use to it and yes, you eill sweat in them. I knew some cops who do wear them in some of my old post who come would say the same thing as it'll be uncomfortably weird in not having them on.
And yet they still are the ones all trigger-happy and instigating violence
“My tires were bulletproof, but unfortunately the rest of my car was not”
Bonnie & Clyde said the same cuh
Actually, the tires wouldn’t just serve the purpose of being bullet proof, but also last very long due to being made of the material. A tire might accumulate more damage than getting shot at over the course of many years, but your car will be fine because it’s not the thing touching the road.
I get the joke but even in the toughest all terrain tires the sidewall is still the weakest.
(Meaning that even in the most military grade bullet resistant tires, the sidewall is never strong enough)
Unless it's a semi truck tire that weighs hundreds of pounds then the tire can still be pierced. But once again it's only the sidewall.
Only military semis/tractors are 100% bulletproof with rubber tires.
I used to make bulletproof vests rated for 7.62 rounds. It starts with a ceramic plate, then hundreds of layers of super plastic are compressed by being superheated in a kiln around the plate. When it comes out you spread this extremely caustic epoxy around the edges of the finished product to protect it from environmental hazards. THEN the plate is stitched into a Kevlar vest. The whole thing with a front and back plate weighs about 15 lbs. We were also considering making helmets that could withstand pointblank 7.62 fmj's but ultimately decided that it was pointless as the force of impact would likely break the wearer's neck anyway. It was a good job but government contracts were unreliable, we'd spend entire weeks just sweeping floors during periods of stagnation. It was nice knowing that I helped craft a product that saved a few lives though.
Compliment for the job, few can say I've created modern armour which saves lifes
As a chemist this video made me very happy!!🤗
As a video this chemist made me really happy!!🤗
As happy this chemist made me very video 🤗@@gamerxtreme1354
1:59, shouldn't it be terephthalic acid instead of that terefloral chloride (idk name), the cooh has an oh structure for condensation, without it polymerization itself shouldn't happen.....am I missing something,sorry new to this
I thought it was simple, but now I see that it’s fascinating 😆
Kevlar is also used as snare drumheads in modern marching drumcorps due to the very high tensions required. They produce a crisp and articulate sound.
This was very educational. I never knew the material was so complex!
Hey Guys! Great day to learn something new!
1:57. She didn’t make kevlar. She made aramid. The fabric is called aramid while kevlar is the brand name that made the first aramid
Another interesting bit of history is that bullet proof vests existed before this point. I believe Jan Szczepanik and Casimir Zelgen worked together to invent one in 1897 primarily using silk, which had worked noticably well in protecting from the blackpowder guns of that time. There are anecdotal stories of people surviving gunshots due to silk handkerchiefs in their pockets!
I don't know why silk worked so well, hopefully someday I can do a little digging and find out.
my guess is because it's stretchy like a trampoline so the bullets just bounce off but I could be completely wrong since I am not a silk expert (I also know Silk can be made by spiders and it has to be pretty strong for their webs so say for example a fly doesn't just break through it so that could be another factor)
Really good and diverse subjects to learn about through these informative and attention seeking videos.
As a keen chemistry student, this is the only TedEd video that i understand at an advanced level 😂
Thank you!
Specatucular video as always!
nice tidbit at the end about speakers. I'm no audiophile but I'm skeptical of kevlar on speakers...I guess not anymore.
Thanks
Spectacular videos, really helps with education
This is awesome and useful content thank you
Gotta love how they made Stephanie Kwolek ambiguously brown here when is real life she was very much white
i love ted ed :)
Second Chance vs. Magnum Force best davis movie! Ty redlettermedia!
So cool
I feel like the caricature of Stephanie Kwolek (1:00) underestimated her big brain and overestimates her body size a little 😂
Nah its the style of caricature See 0:27 everyone is the same type.
@@anuragsharma4159 it's so bad though
I want the next video is about riddles or history!!!!
Very fascinant 👏 👏 👏 👏 👏
Imagine how scary it was for people in the area
I wish my high school chemistry teacher had taught like this🙂↔️
Nice.
Neat.
As someone who is a retired police officer I have wore tons and tons bullet proof vest I sometimes got shot but it wasn’t that big when hearing that this guy made the vest I started thanking him for my life for days
P.S i got shot for like 10 times and 8 of them come from facing mass shooters I still feel the pain today but at least I am not dead
ACAB
This comment is an obvious lie. Shot 10 times, and 8 times from mass shooters? Jesus. No need to lie over the internet. Your channel is a kid as well.
Superb
And its important to remember bullet resistant doesnt mean stab or slash resistant. So knives are still dangerous.
it does: bullets are essentially smalle blades/pointy metal bits traveling very fast
@@slkjvlkfsvnlsdfhgdght5447 I'm going give others a chance to correct you before I jump in.
@@slkjvlkfsvnlsdfhgdght5447 I hope you're trolling
@@slkjvlkfsvnlsdfhgdght5447sounds like you never seend blade go through kevlar before. Bullets are not sharp. And don't have sharp edges my guy.
I feel like the person who was tasked to animate Stephanie Kwolek never once looked at a picture of her
Lol, I was thinking the same thing. She has huge arms and such a tiny head. 🤣
Maybe that’s just the art style.
Yeah, they made her look kinda Indian, and her head is so small in comparison to her arms. Sure, that could be the art style, but I agree with your point.
@@victoriakovac-hidalgo8244 That's the classic "Corporate artstyle" which everyone clowns on lol
All polymers with sufficient number of repeating units, have a viscous behavior that's why they are called Visco-Elastic materials.
Taking notes...
very tricky - title sound super dangerous and exciting, but is talk about chemistry of micro fibrers. Very tricky :)
wow
Hello which program you use for animation? 😁
ms paint
I wear Kevlar pants when I ride my motorcycle. Teamed with an armored jacket and a well fitting helmet, I have a better chance of surviving a crash.
anything that can either absorb or organize shock waves from bullet's impact can be used as bullet proof
yupiiiii new video ;))))
Bullet vest sings: hit me with your best, yeah hit me with your best shot!
Fire away!
Very interesting but the odd human body shapes used in the illustrations were distracting.
I always knew kevlafrom shooting and survival games I didn't it was simply made with synthetic fibers.
can you do a video about hermit crab?
waiting for your respond
I got a ted ad
Not me early with all these bots 😭. Thanks for the video, TED-Ed!
Simple, there built different
I heard the invention of the vest was inspired by Superman!
Bullet resistant vests are good against small calibres and from assault rifles especially when they being fired at from a good distance away and the bullets lose energy,
But if you get hit by a 50 cal. Nah you’re done for.
I mean... depends on which .50 cal. 50 bmg definitely dead dead, but 50 AE probably not.
Why not go further? A 120mm tank shell won't be stopped either... LOL. Of course if the bullet (projectile) gets bigger and its charge gets stronger, the vest will have a harder time stopping it...
And who tf is walking around with a 50 cal?
@@vincentlee7359 While not conventional, you could carry with a 500 S&W or desert eagle. Definitely not expected, but it's a choice.
@@setcheck67 who has the money for that 🤔
Pretty cool to learn that a female chemist was the one who invented the polymer to allow for bullet proof gear and vehicles, air craft, etc. to be invented
FIGHT! FIGHT! FIGHT!
Kind of interesting we invented nuclear bomb before bullet proof vest. You'd think bullet proof vest will be really useful in ww2
I mean they used plate armor in the Napoleonic era and theres a famous cowboy heist involving a cast iron stove being turned into a walking suit of armor so not really sure what you mean
@@HIFLY01 You literally ignored his point, he's saying they could have done some research to equip bulletproof material to soldiers in WW2
@@jazarli1825 ok and they could have devoted research into making cellphones too so you don't need a 20lb radio. That doesn't mean anything
@@HIFLY01 ... wow, what an interesting conversation
@@jazarli1825 theres nothing to talk about. Technology changes over the years.
Also not going to mention that kevlar wont protect you against a 8mm mauser or 30.06 without high end plates which isn't just kevlar anymore but combinations of different materials. They had steel body armor which would have stopped these rounds but was heavy
Bestagon-shaped bond
I wonder whether extremely pointy bullets would easily penetrate kevlar.
They do. They're called Armor Piercing rounds.
Can you recycle ony of the materials?
SuperMan is bulletproof without a bulletproof vest.
I highly recommend the documentary 2nd Chance (2022) which covers the interesting and bizarre life Richard Davis.
Are their heads really tiny or are their bodies really huge?
1:15 I like her tiny head and big arms. There needs to be more character designs like this. She reminds me of the dude from big hero six! 😄
Did the demon who created Jovia Financial's corporate identity animate this (IYKYK)? This graphical style is so.....unsettling.
Hi
Love your videos, but the music in this one is frusturating to me 🫠.
Theodore Roosevelt: A bullet can’t stop the bull moose!
Ben: Ohh, he a zombie! Headshot!
James: Why did you do that man? You tried to do assassin’s creed call of duty stuff. He got a vest.
🎉
tf2 Heavy : I am bulletproof
TF2 Demoman : Not one of you gonna survive this !
0:58 Why do these videos always use that same corporate artstyle? Like why would an artist look at a picture of her, and decide to draw her arms massive, her head tiny, and her skin a different color?
❤❤❤
If the purpose of a company is to produce shareholder value some way or another, then probably yes. If the purpose of the company is to provide the best product or service it can to the world, probably not.
Those two things often go together.
1 hour gang
I just watched Ted Ed ad in Ted Ed video. 😂
Do they come with a money back guarantee? 🙂
Can you get don hertzfeldt animate one of your videos
Technically the first bulletproof vest was plate armour.
Yes ok
Yeah, Kevlar can save lives, but if you think about it, seatbelts can too
yo
👌🏻✨👍🏻
2:43 ATOMIC WHAT?
Bonds
Bonds, not “bombs”
Joseon Myeonje-baegap: 😢
👀👂🏾🍿
Hmmm
Time for bulletproofproof vest guns
Is the future full plate cyber knights, or skin tight 50. cal rated jumpsuits?
(A 50. cal would still kill you, but atleast your body will be intact!)
2nd
John Wick bulletproof dress
This is why Frank Castle aka The Punisher loves wearing bulletproof armor sleeveless undershirt singlet jacket because he always wants this for preparation protective purpose.
Dyneema is stronger and lighter.
doesn't explain why it's still vulnerable to knife stab
Depending on construction and type of body armor, kevlar can resist knife attacks. Still, if you want the answer to that question, it's because knives, depending on their sharpness and construction, tend to have a smaller area of impact than a bullet. This smaller area makes it easier to concentrate enough force to go through kevlar, at least in the area it gets stabbed in.
Ad-blocker. No just kidding there was that crazy guy that manufactured these for the nation's police. He was nuts.
4th!!!
Kwolek was white.
i dont get it
🔩 Kevlar, a synthetic fiber material, is the key to the strength of bulletproof vests. It was invented in the 1960s by chemist Stephanie Kwolek at DuPont. 🛡️ Kevlar's unique molecular structure, with its parallel chains and hydrogen bonds, gives it incredible strength and allows it to absorb the energy of a bullet's impact, preventing penetration. 💪 This versatile material is now used in a wide range of applications, from helmets and kayaks to speaker cones and tires.
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what is this corprate artstyle looking animation?