How much STRONGER is PLA+ really?
ฝัง
- เผยแพร่เมื่อ 26 เม.ย. 2024
- PLA is still the most common 3D printing material but often not suitable for every application due to its brittleness and bad thermal performance. Modified PLAs known under the name PLA+, Tough PLA or Impact PLA claim to tackle some of those downsides. I thoroughly compared regular and modified PolyLacticActid in terms of printability, strength, stiffness, impact resistance, and thermal behavior. So is it worth spending the extra dollar for those materials? Let’s find out more!
Website article: www.cnckitchen.com/blog/the-difference-of-pla-and-pla-tested-feat-polymaker
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I asked this very question in the creality group on facebook recently. It's like you read my mind! Thanks for going to all this effort.
why?
@@adamfilip Because he's doing the work that benefits entire 3d printing community, least we can do is return the favor.
ColonelAngus101 I actually read it wrong. I thought he said “dont share...”
@@adamfilip That makes a lot more sense. Cheers! :)
“Eco-ABS” is such a deceptive marketing term for a modified PLA. Imagine if metalworkers marketed a new steel alloy as “eco-titanium.” The hobbyist manufacturing community puts up with too much.
"STAINLESS STEEL"
Imagine the surprise when trying to get a nice surface finish the easy way - and the result is not at all desirable.
Haha, I’d be printing with 110c heated bed and since it’s really just PLA it would practically end up a puddle if the model had much weight in overhangs... that is indeed such a stupid marketing name some engineer out there is screaming and probably wanting to strangle them.
imagine when your eco-abs melts when you drill or sand it
Would you like some Eco-Caviar on your toast?
Congrats, on the change in your life!
Thanks!
Also, if you can buy it where you are, try "Bepanthen Antiseptic cream". It is like a miracle cream for babies. Will clear up the baby acne within a day or two... But do double check with the pharmacist or doctor first.
Congratulations...... 💖💖
It's amazing what those bio 3D printers can print, each one is a miracle in itself :)
Congratulations! The real bio-3d-printer still is the best.
PLA+ blends are way different between the vendors, would like to see a PLA+ shootout video!
I need information about printed materials with nano additives
@@dr.mohamadalsaadi1657 p
Yes I found eSun Pla+ to be very superior and also quite cheap
@@yoloswag4063 yeah thats all i use at £18 for 1kg
@@yoloswag4063 I ended up with eSun while looking for well reviewed cheap filaments that Cura had built in presets for when I was just starting out recently. $30/kg CAD on Amazon is pretty good, and have had great results since I realized my issues were being caused by poor parts cooling and a dirty print bed. It also seems to be fairly popular with 3D printing TH-camrs, including one who does miniatures printing tutorials using the exact same filament.
Please test more modified PLA's, especially ESUN i'm very interested in seeing as their PLA+ cost almost the same as the regular PLA
I have done a lot of testing of different materials and esun pla+ is one of my favourite enhanced filaments. Cheap and much stronger at real world loading then normal pla. Also very consistent diameter and very little stringing. I make a lot of GoPro mounts for paintball and airsoft so they get beat on and I have rarely had issues.
I always find it annoying that 3D print youtubers only test boutique brands and totally ignore the 5 cheapest brands which probably supply most of the filament their viewers regularly use.
Right, would be good to know
Also reprapper has a new modified pla that is selling for about 22$, can't find much info on them but still picked up roll the other day to try it out.
@@MetalheadAndNerd Not to mention the boutique brands are not really any better either.
Not many people pay the price of Polymaker, how about testing esun PLA vs esun PLA+ since it is about half the price of polymaker.
I use eSun mostly and my preference is always to use PLA+ over regular PLA. In my experience it prints better and is less brittle. I must admit I was surprised to see how much the modified polymaker deforms, I do wonder if eSun would yield the same results.
Polymaker filament is very good though
good luck finding regular esun PLA anymore
because esun wont pay him? :-P no honestly just run to amazon and test cheaper pla+ (with prime) thats what people buy
@@MoesKeckeEcke I can only find the plus version of it nowadays
thats a nice new pet! what breed is it?
Don't worry about the schedule, we still love your content, take all the time you need :)
She's a homo sapiens.
Yes, I think they are from the planet earth. I myself am looking for a Furling, I already have a human. Anyone know where I can find one of those? lol
Congrats on your beautiful little girl!
PS: The work and worry of children never ends - even when they're 25!
@@proloftz we in germany say "small kids, small problems, big kids, big problems"
@@Krmpfpks I said that for boats. Now for kids too!
esun pla vs esun pla+ for me has a few interesting differences. the pla+ is tougher and less brittle, but has a VERY slightly lower glass transition temp (3 or so degrees c lower)
When I saw the title, I was really hoping you’d have tested eSun’s branded PLA+ 😔
Great video nevertheless!
@@poopoopeepee4981 yeah but it's commonly recommended by name for printed firearm stuff like magazines, receivers, and for the FGC the entire assembly. Also one of the most popular filament brands on amazon.
@@poopoopeepee4981 It's also the top selling in the PLA category as a PLA+ on Amazon UK.
If you look at the comments there is also a lot of people saying they we're hoping it was eSUN.
Final point, when Stefan mentions the different PLA's if you look at the picture eSUN is the PLA+ the picture reference.
@@poopoopeepee4981 You mean the cheapest PLA+ that sells the best? Or are you being facetious?
@@TheKoolBean I guess eSun doesn't pay/sponsor youtubers...
@@napsguns and thats probably why they are so much more affordable.
Love all of your videos! You truly help shed light on so many different questions that I've had. Thank you for all of your videos!
I came across your videos a few months ago after owning a 3d printer for nearly a year. Your content and approach are amazing, I think I've binge watched most of them now! You've ask and answered so many questions that I've had too, but I don't have the resources, time, or experience to dig in. Thanks for enabling us newbies to make more informed decision as we practice our 3d printing skills.
This is my first time commenting on any of your videos, because I have to say CONGRATS! We just had our 4th (and last) kid a few months ago, and it's a wild ride.
Keep the videos coming as time permits. I'll still be here!
Oh, and the podcast with Tom is great too. You guys put us lazy Americans to shame, I can barely understand aother languages, let alone speak them fluently. Great stuff. Thanks again and enjoy time with the family!
Congratulations on the new arrival Papa!
I'd love to see a comparison for Esun PLA and PLA+. I find the PLA+ gives me better prints. It prints a bit hotter then plain PLA. Bed adhesion is good too.
I love your videos and your scientific approach to rigorous testing!! Got me hooked the first time I saw your stuff. Congrats on the new member of the family!!
Awesome video, as always. I have some analysis that people may find helpful.
Toughness is the area under the stress-strain curve at 7:12. Based upon this, the significantly higher impact energy of PLA+ at 9:48 is expected. However, for most practical applications, the part is considered to have failed once it permanently deforms. This is where resilience comes in. Resilience is the area under the linear portion of the stress-strain curve. Looking at the graph unmodified PLA is significantly more resilient. Moreover, it has a larger strain before permanently deforming. This makes the unmodified PLA significantly better for the vast majority of parts. From these numbers, an easy rule of thumb is to not even consider PLA+ unless the part you are making is intended to be permanently deformed, like a bumper that needs to absorb impact energy.
I could not have said this better my self. A part is broken once it have made a permanent deformation. And it will probably be completly broken if you bend it back so it can perform the function it was made for. This is relevant when comparing PLA to other materials also. I always see a trend where everyone want ABS-like materials. But ABS is weak crap, but just because it have impact strenght people think that is all that matters.
Congratulations on the changes! And thank you for the useful experiments!
Congratulations on the new addition to your shop and thanks for another great video.
Congratulations to you and your family, I too have my own little change as well since a month ago, and plenty of time to watch your videos. I bought an ender 3 pro about a week ago and found your channel as I was looking for advise on how to start on 3d printing, and your insight has been a tremendous help. I want to thank you for every bit of knowledge you give us. Hope you and your family are doing well through these troubling times, have a wonderful day or night :)
Congratulations on the birth of your daughter! I always enjoy your material properties videos. Thanks for sharing.
Thank you very much!
Congratulations Stefan, Wishing you and your family a bright future together
Thank you very much!
Congratulations on the new addition to your family!
Funny how i started to get interested in 3d printing again
Looked up different styles of printer builds to build myself
Then rediscovering this channel and all the videos about variables that contribute to the strength of parts
Only to stay this long to see a new video uploaded ^^
You definitely deserve my sub
Congrats on the new addition and great investigation. 👍
Congratulations!!! I'm so happy for you. Having a child definitely is an extreme life changing event. Nothing will ever be the same. It is interesting and awesome to see how they grow and mature right before your eyes. My daughter is now 3 and she leaves me dumbfounded and surprised every day! Again Congratulations to you and your lady 🙂
Oh and thanks for the video!...lol
i use PLA+ from e sun for my airsoft magazine adaptor, even tho on magazine lock that resisting heavy spring, it's still hold up even tho my design is bad, that all i can say for now, some fail is just layer bonding as usual
and btw, congrats
Very very interesting. Love your content, thanks! We are now testing 3d printed frames for aggressive inline skating and PLA+ might be what we need to absorb impact. Would be really interesting to see some tests for self-lubrication and abrasion resistance of different materials.
I love your content and scientific approach! I would be thrilled to see a video on high temperature PLA. I am working on a project where i need the strength and stiffness of PLA but the temperature properties of ABS. Manufacturers and retailers don't really give up the datasheets in many cases.
I really love your setup of self made material testing machines!
I work for a company which produces professional ones and i have to say, i have never seen such a sophisticated amateur setup!
Thank you for your work.
Great video, I've been waiting on this video for a while. Like everyone else has said, it would be interesting to see how some of the cheaper PLA + filaments from ESun, Duramic, etc perform. Congrats on the baby!
Would love to see another video comparing esun pla and pla+ since the cost difference is so minimal
The "Industry standard" for 3D printing firearms and firearm parts (including pressure bearing parts) is eSUN pla+. There are 3D printed firearms (FGC-9, Plasikov, fmda glock frames, etc.) that utilize pla+ that have gone for thousands of rounds. I personally have an AR-15 lower receiver that has gone for over 500 rounds with only minor wear.
Would be interesting to see a comparison to other modified PLAs. I'm sure esun is mainly used to it's price and availability. Not to say it isn't strong enough. Just wonder if there is even better pla to be used.
Congratulations to the new little engineer Stefan and thank you for your interesting experiments.
Herzlichen Glückwunsch zum Nachwuchs.
Und danke für deine Vidoes. Sind immer sehr lohnenswert.
Beste Grüße aus Brisbane, Australien.
Congratulations Stefan! Enjoy watching the little one grow up - it's fantastic :)
Congratulations on the organic 3d print ;-)
I have been 3D printing PLA & PLA+ on my Ender 3 for three years and only just tried PETG, it was a lot easier than I thought thanks' to your earlier videos on the subject. Greatest respect and nice to see the next generation in this video :-))
Congratulations on the new family member!
Congratulations on the new addition.
Excellent video, thanks for the comparison. I would really like to see eSun PLA vs eSun PLA+ since the price difference is negligible.
Excellent video!
I use PLA and eSun PLA+ to make wheels, sprockets and tracks for my RC-tanks and it works very well, even on larger models such as 1/6 scale vehicles.
Great video, you are by far the most interesting 3D printing channel.
So you have a child now! Congratulations 🥳
🖖
Congratulations on the baby! Enjoy the next couple decades!
Child number 4 just left for college and child number 5 is about to turn into a teenager. It's been a joy!
You should test materials for creep, it's probably the greatest weakness of PLA other than low heat deflection temperature (but that can be fixed with annealing, seems like creep can't). I've had some PLA parts fail with stresses under half of the tensile strength, just over a long period of time.
+1, have had quite a few crack apart after some months or years of continuous or regular brief loads. The continuous loads were really small. I am abandoning PLA because of this. I also noticed, the older the spool - the worse this problem gets.
Ive been waiting for this video for a very long time thank you!!!!!
Congrats on the little one that will make big changes for you! I tried pla + max and the other modified pla filaments. For me it's not worth it. I prefer just to use pla most of the time or petg for mechanical parts and occasionally I use abs for temperature resistance needs. I will be trying some prusament pc blend soon!
Thanks for doing all these tests for us. It's very much appreciated!!
Your quantitative analysis is consistent with my qualitative analysis. Been using eSun PLA+ almost exclusively for years. It's easy to print and has good ductility improvement over standard PLA. And as you showed, it's only a little more than regular PLA which I can price into my products.
I need information about printed materials with nano additives
Congratulations Stephan!! Very cute!!
I love these testing videos! (And congratulations!)
CONGRATS TO YOUR BABY 🥳🥳🥳
Congratulations!!! I might be ok with the changes in the video schedule if you include the baby in more videos. So cute!
Another great video Some of the results are as I'd expect, but some were very surprising. It would be interesting to see if the results are similar for other brands as well. Maybe a manufacturer that is directly branded as "PLA" and "PLA+".
And congrats on the new addition!
Congrats on the baby! I don't print as much in the 1 year since my baby is with us, but I can't wait to print things for her as she gets older. PLA+ i use primarily eSun brand, and I find it is very resilient to moisture exposure - leaving normal PLA in my printer for more than 2 days ends up in broken filament which is difficult to remove. PLA+ seems not to matter as much, and i can leave it a week before it gets wet enough to cause problems.
Herzlichen Glückwunsch und Willkommen im Club! 😁
Dankeschön!
Thank you, Steffan, for making proofs on my point of view.
ever since I've open PETG for me I used it for technical designs exactly due its better temperature- and impact resistance. And use PLA mostly for decor prints, for its better stiffness.
Plus my local filament supplier have PLA in spools of 1, 2, 3, 5 kg (actually also bigger, but I don't need so much at the time)) and kg-price reducing gradually bigger spool i'm buying.
p.s. Congratulations!
great upload! and Congrats on the new schedule change :P
Congrats and all the best to your family
Congrats on the big change! With the introduction of my daughter almost a year ago now, my life hasn't been the same since. You're in for one hell of a ride!
Thank you! It's going to be "different" ;-)
I've never really thought about it when watching, but realized while watching this video, just how good the B footage is. The camera work overall is awesome as well.
Congrats! Best thing you have ever made!
A great video as always 👍
Thanks for sharing 👍😀
Congratulations Stefan! P.s. I love seeing new videos pop up from your channel.
Congratulations on the new entry!
Very nice vidéo :) first time I saw your video and now i am a subscriber ;) Very nice job
Glückwunsch zum Nachwuchs!
I have used PETG and PLA+ from filament world for micro copters (Toothpick-size). My printer has some issues with small parts in PETG, but PLA+ works fine. The latter can take a good beating and can also be glued together, if it's minor damage.
Herzlichen Glückwunsch und alles Gute! :)
Thanks for another great video. Would be great to compare multiple enhanced PLA´s from different brands. I just purchased several spools of Exrudr PLA NX2 I wonder how different it would behave against standard PLA and also against other brands. Congrats on Emmi :) it will change your world positively! :)
bro this was very informative, the very first filament I used was PLA+ it just seemed like a good starter option for a beginner and it was a good brand on sale. I was told it performed ever so slightly better but I have been unable to compare it to know the facts thanks for all this information. BTW it was only 21.99 that was 1 dollar more then its cousin of the same brand. I would say the material stress factor was way better all around on the PLA+ because it stretches and I like the more of a matte finish, but in all honesty this preference kind of comes down to what you are printing and its use case. I don't think the one dollar more is too much to ask for a higher print success rate either.
Congratulation on your new addition to your family... I have been using Polymax PLA for printing RC car parts, works out much stronger than PETG or ABS. that I have tried... to the point of being almost unbreakable.... almost.....
Congratulation Steve
I used PolyMax 4 years ago for RC car (HPD F1). Since then I have mostly been using Esun PLA+ as it (in my application) has performed better especially in layer adhesion. That it is less than half the price is a bonus.
At the time PolyMax had its place as it performed so much better than the PLA that I was using then.
If I want better impact strength than that I go for Alloy 910.
@@KentAsplund Hi Kent, thanks for the heads up on Esun. I have ordered a real. thanks Steve
Great vid, new subscriber, and congrats on your ‘change!’
Great video. At the end I wished for a side by side comparison of PLA+ to PETG backed up by data from your previous testings.
Thanks for doing these tests! I'm a semi-retired mechanical engineer and have been doing my own testing on various PLA+ filaments. I make small structural parts and have found PLA+ to be ideal for my applications. Independent of price, the Polymaker Polymax is the toughest. CC3D PLA Max is almost as tough but significantly lower cost; I tend to use that for the majority of my prints. eSun, IMO, is good in that they have a wider selection of colors but is noticably less tough than the CC3D. Thanks for verifying my findings and keep up the great work! Also, congrats on the little one (good luck sleeping, ha ha)!
Hey! Congrats Stefan!
Hey Stephan, I used eSun PLA+ and I am quite happy with how it prints, I have not tested the strength but it really prints really well. Thanks for yet another amazing filament test video. Congrats on your baby.
I cannot report such good results. Inconsistent filament thickness, bad bed adhesion from 50-70C on a glass bed (not even ob masking tape) therefore severely warped prints.....
@@GreenCaulerpa For me the filament sticks well to my default ender 3 glass bed
Ja, sehr gut! Greetings from Australia. Love your videos dude!
congrats on the new little maker in the family!
Danke, gut gemacht ! Gratuliere noch alle.
Thanks Stefan for the Video. I would have loved to see W2 Filaments PLA HI also in this Video. It is a High Impact (modified PLA) which can be annealed.
I first got a 3D printer in 2017, and like everyone else, got a roll of PLA and a roll of ABS. We were warned not to use the PLA for functional parts, but ABS was a major pain in the rear - it warped, it wouldn't stick to the bed, etc. etc. etc. A local company was selling something called "CPLA" which they claimed was tougher than regular PLA, so I got a roll and... well, it was like a totally different material. It was really easy to print, and and it was NOT brittle like PLA. It was tough, like ABS, with none of the warping issues. I was so impressed I used it almost exclusively until, unfortunately, it became unavailable. I was quite disappointed (though I had a half dozen rolls of it on the shelf). Sort of got out of 3D printing until recently (printer needed a new nozzle), and was wondering why no one on TH-cam was doing reviews and tests on modified PLAs. Eventually I found a few - mainly involving eSUN's PLA+ - the consensus was that it's tough and easy to print - just as I had experienced. I've just recently got a roll of the eSUN PLA+, and another Chinese modified PLA called PLA-F (which comes really neatly wound on the spool - no more tangles). The former is expensive if bought locally, but is cheap from China, the latter is VERY cheap, as cheap as I've seen for PETG, though not as cheap as some regular PLAs. The company that was selling CPLA is now selling something called PLA-Max, which I'm going to try soon, too. I've got a roll of PETG and will give that a try eventually. I mainly use the CPLA/PLA-F/PLA+ for making accurate tools, patterns, guides and jigs, for which it is totally adequate - this is where I think the power of 3D printing lies, not so much in functional parts (though I also plan to make some of those as well).
Congrats Stefan!
Thank you for your hard work and congratulations!!! :-)
Congratulations Stefan!
Congrats on the baby!
Congrats brother!
Good video! And congrats on the kiddo!
Thank you for this. It was one of my Concerns when i switched to PETG full time. This has really enforced my decision. I just wish we had all the Pretty stuff like PLA does.
I don't know if anyone has already said it but your strength test rig has a beautiful singing voice
Thanks for another great video! One test I'd really like to see is how easily different materials deform over time. For example, I've designed a simple filament clip (thing:2867427) that keeps the filament in tension around the edge of the spool. The ones I've printed in PLA become loose over time, while PETG seems to keep its tightness. It seems PLA will slowly deform under tension, and it would be cool to know more about this, and how other materials perform in this respect. Have a good one!
Congratulations on your new family addition.
We need to make a gear tooth strength test and see if the plus is better in that application. Your videos are awesome!
I picked up a roll of Inland Premium PLA for my first ever 3d printer, and so far, it's working out fantastic! I made a small steering wheel for my ps4 controller, and the parts were extremely strong!
Congrats for the kid! Be you all healthy and happy :)
Congratulations on the new addition to the family! Don't worry about your schedule, that little one dictates it now :)
Congratulations, Stefan!
Very interesting. Thank you!
Congrats on the kiddo Stephan!
Recently I ran into a issue when printing with a 1mm nozzle on some modified PLA it acts like nylon that just bubbles and looks awful, while a 0.4mm nozzle has none of the issues.
Im drying it now but its just something i haven't seen in a while.
I've seen this EXACT behaviour from eSun PLA+. 0.6mm nozzle: No bubbling, at 0.8: Un-usable, it bubbles like it's designed to do it. Brand new spools and old spools act the exact same, so I don't think that moisture isa huge factor unless eSun have very wet filament out of the box, but that doesn't seem to be the case, because it normally prints excellently.
@@wefyb2 Well i just got done with a 600mm vase print after drying. The extrusion is perfect now! Its definitely moisture, a 1mm nozzle just cant maintain enough pressure like a 0.4mm nozzle does.
Also im using a 4kg spool, even with 18 hours of drying at 50C the center seems to have some moisture still, as it shows in the upper layers.
From now on any and all filaments gets dried, its been driving me mad. nozzle size was all i was changing and would give me hell.
@@zviper I guess I need to get the ol drying chamber out then! Thanks for the reply
@@wefyb2 I'm just finding out that 4kg spools need a lot of time to dry through to the center. My 600mm vase had a bit of bubbling from moisture in the last 100mm .
So if you have a way to use the filament while printing, do that
Herzlichen Glückwunsch Stefan! now for the tests of materials suitable for junior haha
The situation from two years ago is still relevant today. My printer manufacturer only supplies PLA+ as official filament. Problems with moisture absorption are greatly reduced. Today's PLA+ printed products have the impression and characteristics of acrylic or glass rather than plastic. I have some concerns about safety, but I like it for my use.
While watching this video I had a bit of a eureka moment as my hobbies and work experience came together to make me have a realization.
I used to just watch these videos for fun but now that I'm seriously getting into printing and now know what I'm printing it makes videos like these even more interesting.
I'm an ironworker (Steel Beam / Rebar Guys) And right now I'm learning about rigging and cranes, so right now mostly about different fiber and metal wire ropes.
For many things Ironworkers use steelwire ropes to pick things up with cranes. they're reliable and can be constructed in different ways to have better bending or wear resistances.
(This comes back to 3D printing I promise)
Another option that exists out there is using chains instead of steelwire ropes. Chains don't stretch, they're strong as hell, easy to hook shit up with, they're really great.
But they're rarely used. Why?
Because whereas wire ropes will show signs of weakening before they fail, giving you ample warning to replace them, if chains fail they suddenly and violently snap and drop loads which is dangerous as fuck.
So even though chains may be "Stronger," the physical properties of wire rope are better because they give gradually instead of at once, much like PLA (Chains) vs Wire rope (PLA+)
This made my search for the right filament click because the objects I will be printing will undergo many shock loads and I'd much rather have my part show signs of failing rather than looking fine until it suddenly explodes when I need it the most.
Congratulations on your need addition!
I usually use eSun PLA+, but during lock down I tried some SunLu PLA+ (as I couldn't get eSun), I just could not get on with it. I bought a 3 roll pack of 3 different colours (3D printer stock was getting rare).
Each colour sent me back to basic tuning every time, and I never found a setting for any of them I was completely happy with. The silver being the worst. It was like printing with rubber, continual oozing and stringing which left the nozzle empty for the start of the next layer. I couldn't print anything that had long travel moves. Changes in retraction made little to no difference.
I don't know what their formula is, but completely parts were noticeably more flexible than I was used to.
I might as well have been trying to use PETG! (I have a non-bowden machine for that!).
I was so glad when eSun came back in stock. I pulled up my previously saved profile and everything was great again.
Had the exact same experience, usually use Esun PLA+, tried SunLu PLA+ - it was the first filament I have used of any kind that absolutely required bed adhesion help. Could not get it "dialed in" to good print settings. The Esun PLA+ "just works". no bed adhesion problems, no warping. Bit of fine stringing that can't be "tuned out", especially on the black, but I just give prints with strings a very quick "flame treatment". I would also like to see how Esun does on the "CNC Kitchen standard tests".
I find it funny you mentioned about the difficulties with the silver filament. I have been battling my way through 2/3 of a roll of eSun silver PETG trying to get a decent print. It prints exactly as you say, like rubber. I tried it on both a direct drive printer and a bowden. Just before pulling my printer apart to fix a problem that didn't exist I tried a roll of black then a roll of red. All at the same settings & with the same pre-treatment. Both printed perfectly. Guess I won't be printing silver anymore...
SunLu used to be really good. Since "Corona" they have massively reduced their quality and I have ended up sending several reels back.
It looks like they are extruding it in the cheapest and fastest way possible now, as it used to be a high end filament, and not it a tangled mess of inconsistent width junk
Congrats on your little one! Can you test Dow OBC (Olefin Block Copolymer) Filament?