The Engineering of a Disposable Diaper

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Bill reveals the stunning engineering underlying the design of a diaper. He describes the five layers of a diaper, including the superabsorbent polymer in the diaper's core. He illustrates the action of this polymer with a stunning demonstration using a single bead of polymer: it soaks up enough water to grow from a diameter of 4 mm to nearly a half inch.
You can bundle watch Bill's videos using this playlist:
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If you are interested in mechanical computers you'll likely enjoy his series on Albert Michelson's Harmonic Analyzer -- a 19th century machine that calculates Fourier transforms:
• Albert Michelson's Har...
Creative Commons Images Used in Video
First cotton image is by dotlizard
www.flickr.com/photos/dotliza...
The cotton candy image is from Stefano Mortellaro
www.flickr.com/photos/fazen/7...

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Опубликовано:

13 июн 2016

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Комментарии : 809

@FilmmakerIQ 8 лет назад

Not sure if this is my number 1 favorite video on diapers.... or number 2.

@traxonja 8 лет назад

Haha

@markfryer9880 8 лет назад

Oh your going to diaper hell for that one! ; )

@lemonke8132 7 лет назад

Hahahaa

@tohopes 7 лет назад

Either way, we've got you covered.

@rafetizer 7 лет назад

lmao

@BluDog35 7 лет назад

"Stagnant Pool Of Evacuated Urine" The name of my new metal band.

@kahlzun 7 лет назад

I like it!

@Scars_House 6 лет назад

ime sorry but ...."explosive liquified bowel movements" is much more catchy

@hoilst 5 лет назад

Wasn't that a Cannibal Corpse song?

@operator8014 5 лет назад

Save ink, just go with, "S.P.E.U." ...

@ewanwilson1974 4 года назад

BluDog35 I would love to see someone announce that for a concert.

@PracticalEngineeringChannel 8 лет назад

This is fascinating. Excellent job covering a tricky topic with professionalism ;) In civil engineering we have woven and non-woven geotextiles that serve different purposes as well. Great work as always.

@lioraselby5328 8 лет назад

Hey look, it's one of my favorite engineering RU-vid channels commenting on my other favorite engineering RU-vid channel!

@ttykv 8 лет назад

engineerception

@Seff2 8 лет назад

youtube is awsome :D

@zoppp621 8 лет назад

I just subbed to you a couple days back. Keep up the great videos both of you!

@loucummins7918 7 лет назад

Practical Engineering you might know this. How were the kings pyramids of Egypt built? I'm wondering if either you or engineering guy can help. Love both your channels.

@kyle-silver 8 лет назад

It just struck me that almost none of the mechanics of these diapers rely on gravity, meaning that no matter what the position of the baby (laying down, on an angle) the diaper will be equally effective.

@engineerguyvideo 8 лет назад

That had not occurred to me, but of course that's true! Good observation.

@johnnychang4233 8 лет назад

Isn't modern diapers also a result of space exploration and it's associated inventions? Of course they designed it to work under zero gravity.

@kyle-silver 8 лет назад

Disclaimer: do NOT hold your baby upside down to test this!

@DarknessLPs 8 лет назад

on the contrary, hold the baby upside down and for added effect, shake it quite vigorously to test the adherence to the child

@trinhkets 8 лет назад

you need Jesus...

@MonMalthias 8 лет назад

I wonder what the guy at the patent office thought when he read the sentence, "explosive liquified bowel movements".

@Tumleren 8 лет назад

"Yeeeup, bad mexican food'll do that to ya"

@Aelfraed26 8 лет назад

Freaking Chipotle. Why does it have to be so good?

@BobWidlefish 8 лет назад

"I bet Taco Bell is going to sell these with every order and make billlliiioons!"

@catfish552 8 лет назад

If he was a dad, probably something like "Oh, thank god for that..."

@ezekiel0606 7 лет назад

Palider south park?

@Getyurfactsstrait 8 лет назад

I used to work on diaper machines and what you said at the end is so true. I was amazed at how fast these machines would run. We were a smaller company and the machines ran at 650 dpm. Even at that speed it's was really something to watch. Everything had to be synced up perfectly for the machine to operate properly. One of the most interesting parts of the machine was the vision system which would reject any diaper was out of spec while running at full speed.

@AlondraSanchez-wl2js Год назад

I work at a diaper plant and our machines run at 800 dpm and it’s spits them diapers out like crazy

@muntasirnasimtasif5434 7 месяцев назад

Hi, may I know the origin/supplier of those equipment?

@peterlinddk 8 лет назад

I love videos like this one and the one about aluminum cans - stuff that we think of as simple "throw-away" items, but in fact contain a lot of ingenious engineering solutions! A shame that we can't get to see the manufacturing process.

@Tunkkis Год назад

I'd wager many of those clever engineering solutions are the reason they've become so disposable, through being so efficient to manufacture.

@nickkillian 8 лет назад

You know, as a first time father (7 month old child), I have wondered just how the basis of disposable diapers worked. I knew it had to be something far more than meets the eye. Now I know, thank you.

@derickb8713 2 года назад

I am impressed that at only 7 months old you are already a father. 😆

@DEVILMATE1996 8 лет назад

TIL babies pee at 6 mph.

@zeroforconduct8008 8 лет назад

They pee faster. The absorption happens at 6 mph, not piss coming out of the dick.

@Jack-vp6wc 7 лет назад

TIL babies must be moving at more than 6 mph to pee. /s

@bentleyboy72 5 лет назад

@@zeroforconduct8008 Watch the video again. He clearly says "it (urine) strikes the topsheet at over 6 mph."

@danielflanard8274 4 года назад

@@bentleyboy72 "at over 6 miles an hour"

@jimbo80982 4 года назад

Depends how fast it's running at you

@stevesynan3910 8 лет назад

I went in thinking 'what could possibly be that interesting about a diaper?' and now I'm completely blown away by materials science and need to learn more! Great job as always!

@holtek86 4 года назад

I have been working in this industry for over 30 years so I do get to see the machines that make diapers and similar disposable products every day. When I started, 400 products per minute was considered fast and everything was driven by a lineshaft and belts. Now it's hundreds of servo motors synchronized together with incredible precision and well over 1000 products per minute is a reality. Thanks for explaining the product so well, we do kind of take all this for granted but there is quite a bit of engineering that goes into it!

@jmorv8866 Год назад

This is an excellent video to illustrate the internal dynamics of scientific engineering that goes into something as simple as a diaper. Furthermore, it can either prove or disprove claims made in advertising, so in essence, Bill proved that super absorbent diapers actually work. It's the 'how' though, that to me as well, is super fascinating. If I had gone into chemistry when I was younger, I sure wish I would have had Bill as a teacher.

@Fire-in-the-sky 8 лет назад

I fucking love your videos man. keep it up!

@hacehase 8 лет назад

thumbs up

@ronshaw80 8 лет назад

Is that language REALLY necessary? Makes you sound really professional.

@CaalamusTube 8 лет назад

They're just words man. Stop trying to police people. It's not as though he was abusive or derogatory! On the contrary, his use of the word "fucking" served to convey positive regard. ...or, at least if you *ARE* going to insist on trying to police people ( in RU-vid comments of all places :P ) Stop being passive aggressive! 1st Amendment... *FUCK YEAH!*

@Fire-in-the-sky 8 лет назад

+Ron Shaw what gives you the idea i was trying to be professional? we are in RU-vid not a a FUCKING job application. +Bilb Ono oh what a great insult. 10/10 man

@Fire-in-the-sky 8 лет назад

+Caalamus thanks man, some people just like to bitch about everything.

@klorn32 Год назад

I just discovered Bill and his channel. I could listen to him talk all day. Great voice and presentation.

@itcamefromabox 7 лет назад

Listen Bill, I don't want to freak you out but we fall asleep to the sound of your voice at night. I'm not saying you're boring because we love your content, i'm just saying you have a soothing voice. KEEP UP THE AWESOME WORK :D

@superluig164 6 лет назад

We? Speak for yourself.

@marrs1013 6 лет назад

It Came From A Box Called accidental ASMR.

@jakobarend4526 5 лет назад

tinylilmatt literally my go to channels

@bfoot2211 3 года назад

I’m proud to get my friends to subscribe and Bill from one father to another thank you for getting my three year old to sleep. Doug Demuro could only dream to have a voice and a presentation Elegance such as yours. Keep up the great work it is true fascinating relaxing. I wish more RU-vid video producers would relax their attitude and truly research before they open their mouth in front of a camera. If you haven’t heard of the channel “Brooklyn Duo” they are a classy family of musicians that your family might enjoy. I’m looking forward to your next upload.

@douglasparkinson4123 3 года назад

i use engineer guy videos as calming for if im panicing for something coming in the future

@wheeman999 8 лет назад

So glad you're making videos again.

@harrisonbalduf3290 6 лет назад

This man could narrate anything and I'd watch it.

@HPerrin 8 лет назад

I love how passionate this guy is about any engineering advancement. We could make a device to better fling shit at a wall, and Engineer Guy would love it as long as it was engineered well. That's the kind of spirit and wonder we need to teach children. Keep making these awesome videos!

@rym6060 8 лет назад

I don't even know what's happening in half of his videos, but it's very soothing and interesting to watch/listen to so I get completely lost learning about diapers and coffeemakers ...

@BirdSpyAustralia 8 лет назад

I was not expecting to be learning about diapers tonight, but here I am. :)

@barrydavid6634 2 года назад

it's kinda interesting isn't it

@McRocket 8 лет назад

Wow...I have seen possibly all of your videos and enjoyed all of them. But I thought this one would be different. I was wrong...I am surprised at how fascinating a diaper is.

@DanBillings 8 лет назад

I'm a UIUC engineering alumnus and these videos make me very proud. Always incredibly informative and the production is airtight. Thanks to Bill and your team!

@thomasdarby6084 5 лет назад

I've worn adult diapers for over 20 years since two strokes left me partially incontinent. The ones I use don't have the plastic outer barrier, but they work the same as a toddler's pull-ups. Thankfully I have not had to test their capacity!

@CentralNintendo1 8 лет назад

At 3:00 the millimeter numbers are mixed up, it's supposed to say "2" "1.5" "1" "0.5"

@IUNFE 8 лет назад

I am not an engineer, but you make me want to be one. Thank you for the informative video.

@skyfeelan 7 месяцев назад

not planning to have a kid in the near future, but I really love the engineering principle behind it!

@nelsondisalvatore9812 7 лет назад

the only bad thing is that it is practically unrecyclable

@honestytoafault 4 года назад

not so. the absorbent layer is great for retaining moisture in soil.

@lyrimetacurl0 4 года назад

@@honestytoafault would that be good for the Chinese tree planting project in the desert?

@Visitor2Earth 3 года назад

I have read several environmental studies over the years comparing the effect on the world of a disposable diaper vs the effect of a cloth diaper that needs water and chemicals and energy to be cleaned/dried. Surprisingly, cloth diapers had more of a negative impact than single use cloth diapers on our environment...very surprising results!

@nelsondisalvatore9812 3 года назад

@@Visitor2Earth realy you have read so, even you are a 12 years old ginger?

@letsmakegadgets6899 3 года назад

@@nelsondisalvatore9812 What does that change? Is he not allowed to do research because you believe he shouldn't?

@fat_boy_slim 7 лет назад

The only man who can make diaper engineering sound interesting, love this channel

@tommythai1043 8 лет назад

3:04 Shouldn't the labels for 1mm and 1.5 mm be swapped?

@MichelPASTOR 8 лет назад

Good catch

@DIYTyler 8 лет назад

My mind just exploded! Need to make that many a minute to keep the cost down.....might be a neat place to work.

@AMULET72 7 лет назад

as the daddy of a nine month old baby boy this is very interesting and I am glad that I can buy them and get the benefit of their creation. I can still see my own mom washing cotton nappies by the dozen and drying them on a line outside in the air. hard work and a lot of waste water, heat, detergent etc.. but still, over four million nappies a day disposed of in the UK makes me wonder about the effect of this manufacturing process and their disposal. either way, hats off to the people who made this possible. necessity being the mother of invention and all that.....

@RonJohn63 6 лет назад

Diapers are a tiny fraction of the waste stream that winds up in landfills.

@unlokia 7 лет назад

The engineering in this invention is INCREDIBLE. God bless you, Bill, and thank you for all your hard work and effort. Matthew.

@RealBenAnderson 8 лет назад

Explosive Liquified Bowel Movements

@dineshkumar-qs6sy 2 года назад

This video should be an example of how concepts should be explained, perfectly done. Excellent work. Thanks for the details.

@mikestoneadfjgs 8 лет назад

I clicked on this video thinking it would be boring, but boy was I wrong. I had no idea that something as common as a diaper had such fascinating engineering. Excellent video as always.

@jesutherland 8 лет назад

I"m really enjoying the longer form videos. Thanks!

@MaxVelez 8 лет назад

Beautiful explanation of such an important modern technology. Love you Bill!

@DekuStickGamer 8 лет назад

I really love learning the everyday engineering that goes into things I use. They're so hiddenly complex, it astonishes me that thought actually went into it in the first place.

@aegisfate117 8 лет назад

Makes me wonder if everything is actually man-made and man-thought. An alien race could be inserting this knowledge secretly into the human consciousness to speed our technological development.

@aegisfate117 8 лет назад

Imagine trying to make a toaster by yourself (there's a Ted talk about this). You could never do it because it requires too many specialties coming together. With all that knowledge out there that you do not need to understand and could never understand creates the perfect backdrop for physically possible things to be secretly revealed to humans through their "chance experiments."

@DekuStickGamer 8 лет назад

Wow...there's some truth to that. That's really interesting. Have you got a link to the ted talk?

@DekuStickGamer 8 лет назад

Though I'd have to refute the alien statement. I think it's perfectly possible that the creation of these complex devices came to be. A need arose, demand was high, great minds created ideas and collected and a product that we use now was developed over time. A new ideas continue to come. Or are you reffering to something else entirely that I've misunderstood?

@ScrewThisGlueThat 6 лет назад

Great Documentary... I am stunned at your knowledge and professionalism.

@SaznizamSazmee 7 лет назад

As a new dad, I can now appreciate the beauty in the engineering of a diaper.

@SubhomMitra 8 лет назад

This is just so impossibly fascinating! Thanks for making such great content; can't wait for the videos on Faraday.

@NewMetallica 8 лет назад

Bill your videos really make my day! I am always amazed at some of those things that are so self-evident in life have such interesting engineering stories. You rock!

@2kimports 8 лет назад

Excellent video Sir! , Please do not stop making these! They are fantastic!

@dimesonhiseyes9134 5 лет назад

Pro tip : you can use diapers to help a wound to stop bleeding. The inner 2 layers do a great job of promoting coagulation.

@IceyJunior 8 лет назад

You should make more videos and upload them frequently ! So knowledgable !

@originalscottfree 7 лет назад

I never gave much thought to diapers however after watching this video... Wow, I am amazed.

@jayweb702 4 года назад

Well Bill thank you very much for making this informative video. I used to work for Paragon Trade Brands years ago as a machine operator who made these diapers and I'm still fascinated by the production process as I never never operated any machine like it since.

@skenzyme81 8 лет назад

Stunning video. Your series is like nothing else. When you and your team get picked up by a network, please strive to maintain your excellent standards.

@abdullahsagheer6543 8 лет назад

These videos are always a pleasure to watch!

@Dimaz42 4 года назад

I’ve never thought that I would enjoy watching how diaper works.. great explanations, Sir! 👍

@sjcea0512 4 года назад

Your videos absolutely amaze me! You are making me look at things totally different than I ever have before

@pyotrleflegin7255 7 лет назад

That is truly amazing! I would never have thought it was anywhere near this complex a system. Thank you for a marvellous channel!

@BibekBasnet0 8 лет назад

what a well-researched, well-made video. kudos.

@LifeHoThoAaisi 7 лет назад

Very good and important information shared. Thank you.

@mainemail528 4 года назад

My favorite channel and my number one favorite video of this channel!!! Long live "The Engineer Guy"

@LifeOfPabs 8 лет назад

this takes how its made to a whole new more interesting level! thanks for sharing this knowledge

@rei_cirith 8 лет назад

Amazing... This was actually really cool to watch. Thanks!

@spikeman4pres 8 лет назад

Great Vid, Love seeing different types of Engineering

@phorth 8 лет назад

Always a wonderful lecture

@SeaOfMadness 8 лет назад

As the parent of a 1 month old boy who shits like a seagull, and therefore gets through hundreds of these things, I found this both interesting and reassuring. Another awesome vid - Thanks !

@lukezelechoski4504 8 лет назад

Great video, as always. Thank you

@xenon9887 8 лет назад

Great as always, love your videos.

@DGFig 8 лет назад

Amazing video, as usual. Thank you very much!

@CatherineLu 8 лет назад

This was so cool. I'd never thought that much about how these things work. Modern technology is astounding. Also, great presentation on a topic that could easily become unnecessarily funny.

@jeffreywillis9313 5 лет назад

Amazing explanation.

@LeFerret335 8 лет назад

Truly amazing video!

@ChristopherWlezien 8 лет назад

Another tremendous video from The Engineer Guy!

@jwoodCAD 8 лет назад

Man, you sure know how to convey your fascination; if someone had told me yesterday I'd be enthralled by a video on the workings of diapers, I never would have believed it!

@ToolTimeTyler 6 лет назад

Wonderful as always

@EngineerNick 8 лет назад

That was an awesome explanation

@dancollins4755 11 месяцев назад

Amazing! Thank you you are a great teacher.

@Samuel126891 3 месяца назад

well presented!

@JoelReid 8 лет назад

The top layer resisting water transfer is why nappies are not very good at mopping up spills. When wiped across a spill the nappy will take some of the liquid, but leave behind many trails of liquid. To absorb all the liquid in a spill one is required to press down firmly on the spill, but this risks pushing out the absorbed liquid in when there is excess, and is inefficient when compared to something like a paper towel. Nappies will not float on water if placed inner side down (which is difficult), when tried then it will absorb fluid from the sides and then become full and sink. Nappies however do not leak from the sides unless it becomes full.

@jamesshepherd5222 Год назад

I used to operate a diaper making machine. Complex and precise.

@firstnamelastname4752 8 лет назад

Sometimes RU-vid's recommendations are spot on. Subscribed.

@MrChangCJ 8 лет назад

absolutely intriguing!

@Alexaflohr 8 лет назад

This is incredible, man. You just earned yourself a subscriber.

@GoodDayFarm 7 лет назад

Love your videos! Great job! Thanks!

@josefdawson5284 8 лет назад

this was much more interesting than I anticipated!

@orchdork775 3 года назад

It's incredible how much science and effort goes into perfecting the seemingly mundane items of every day life.

@linguine4500 3 года назад

Anything to cut down on costs

@FaizanAli-op2xe 7 лет назад

Awesome. Thank you for the video.

8 лет назад

Wow, amazing how such a common thing can be such advanced.

@MH5XXXX 4 года назад

Thank you sir.VERY INFORMATIVE.

@bosapiutsa3829 8 лет назад

Great work, fascinating engineering!

@BGTech1 2 года назад

Hi there

@unitedstatessc 8 лет назад

I'll get you some video of a diaper assembly line. It really amazing, they use these really complicated

@kheffah 7 лет назад

I love your videos! So informative

@nerdheroes 8 лет назад

Hello, Glad so see two new videos back to back. I wish you would have touched on the negative environmental impacts of so many plastic diapers. They are definitely cool tech though.

@Nipplehook 5 лет назад

Im a new parent and for the past 6 months Ive used those exact diapers and at more than one occasion I thought about how amazing those things are, they really do hold so much liquid, yet keep the baby dry at the same time. Its so ingeniously designed and so much thought went in yet a single diaper costs almost nothing and we use and dispose thousands of them without giving any thought.

@davidshi451 2 года назад

Great video!

@duckzor 8 лет назад

This was amazing, thank you!

@MihirrPanchaal 8 лет назад

fascinating video.

@alwaystinkering7710 4 года назад

I've seen how they are made and it's very impressive. The machine might be 60 feet long with dozens of rolls of different materials feeding it, which will automatically switch to feed from full rolls when one gets low. The synchronization of all these rollers and the many conveyor belts is astounding! And it has to handle very thin and light materials which I think is much harder than heavy stuff. They use a lot of vacuum to hold and transfer layers and sheets. Parts are diecut from sheet and the waste is sucked away with one vacuum while another holds the desired part in place. And it's almost too fast to see!

@dedede5586 4 года назад

How does this guy make everything so interesting??

@brendanrees2596 3 года назад

Father of 3 here... brilliant insight. Thank you for the presentation

@cashmiller2999 8 лет назад

Fascinating. Thanks!

@Alphonse57 8 лет назад

love these videos. they are so interesting!

@hadireg 6 лет назад

Amazing reaction of those polymeres indeed! wonder how many out there know about it! :) Thanks for this channel!

@wannabepvm 7 лет назад

Your videos are absolutely great. Originally had no interest in the subject and stumbled across the videos. Love the way you present your subject. Would love to see similar videos about electrical parts as its my trade.