Polymaker TPU Filament 1.75mm Black, 0.75kg Shore 95A Flexible 3D Printer Filament 1.75mm - PolyFlex TPU95 3D Printing TPU Filament 0.75kg Black Soft Flexible Filament

I'm a total novice with this stuff. Printing it in a Bambu P1S. There's not a specific profile for it, so I just used the Generic TPU profile and it prints very nicely with a few tweaks. Really a neat material to work with. Much more interesting than PLA and not much harder to use once you realize that everything needs to move very slowly with this material. Not a huge fan of the carboard rolls, but I found a Polymaker roller wrap for this. It was a good fit when printed at 200.25mm diameter. This helps the carboard roll nicely in my drybox feeder. This absolutely does not work in the AMS. I know the Bambu wiki says it doesn't, but I figured I'd try anyway. They're not joking. It jammed up right quick like.

The trick to gaining clean, crisp prints from Polymaker Polyflex TPU is to print single parts at a time versus batches of multiple components. This makes a “night and day” difference in print quality and precision. Though this TPU Shore 95A filament is very “soft” and flexible to the touch, I am having zero problems feeding and printing it with a 15.5” (long) Bowden tube between my extruder and hot-end. I’m using a stock Ender 3v2 Neo with Capricorn XS tubing and Diamondback nozzle. Here’s the amazing thing: on the non-direct-drive printer set-up described above, I get fantastic prints at low nozzle temp (200 deg C), modest speed (30 mm/s), and with quite a bit of retraction (5 mm distance @ 25 mm/s speed). This is completely contrary to the usual requirements for printing TPU, which is to “print hot, print slow, and turn off retraction.” I’ve experienced ZERO nozzle clogs, extruder gear slips, or filament breaks with this Polymaker Polyflex TPU. But, then again, Polymaker filaments have proven to me to be consistently top-performing and problem-free. The print quality is so high that I’m able to cleanly and clearly print small text (3.5 mm heigh and 1 mm deep) embossed into horizontal surfaces, which get deformed and obscured when I print with PLA. I had so much fun with the accuracy and precision of this Polymaker Polyflex TPU, that I ended up printing 60 hours of parts that I had not intended to produce in TPU. I am discovering that this TPU prints more crisply and accurately on my set-up than with PLA. Polymaker Polyflex TPU Shore 95A is incredibly resilient and abrasion resistant. I created some press-fit components with it that have to be hammered to disassemble. The parts printed in this TPU can absorb huge impact forces from metal punches under forceful hammer blows without deforming, tearing or denting. The clear TPU is remarkably translucent. If you print really hot and slow, on a smooth build plate, with high fan speed, you can get “see through” clarity. This Polymaker Polyflex TPU flows really well with very low viscosity when the nozzle temps go up. Heating it up high and then cooling it quickly keeps it amorphous with window glass-like clarity. Printing at lower temps and letting this TPU cool more slowly allows a crystalline structure to form in the material which is more opaque but exceptionally strong. Usage tip: if you’re used to disengaging the extruder gears to manually push your filament through a Bowden tube … don’t. Select “disable stepper” and use the knob on the extruder to “wind” this TPU filament from the extruder to the hot-end. The Polymaker Polyflex TPU is on the expensive side, but it definitely performs to its higher price point and gives me the impression that it is a premium product. The much heavier gauge “foil” bag it comes vacuum sealed in adds to that impression. As such, I have have been careful to take elevated care of this spool, and put it into the filament dryer for 8 hours before putting it away in a vacuum sealed container with dessicant. I have a whole bunch of other materials on my production schedule, but I am really looking forward to when I can find an excuse to break out the Polymaker Polyflex TPU and do more prints with it. I’ve had such great success with this Shore 95A TPU that I’m tempted to try the 90A rated TPU from Polymaker on my Bowden-tube set-up.

Good quality, strong, works good..

I loaded this spool of PolyFlex TPU95 into my Bambu printer using a custom printed Y splitter and the external spool holder. No drying, no prep, just straight into the tube. Flexible filaments usually make a tangled mess, so I expected a stormy sea. Instead, the Benchy sailed out smoother than I thought possible. The stringing was minimal. A few wisps across the windows and deck, but nothing that distracted from the overall finish. Layer adhesion was solid, overhangs held their shape, and even the smokestack detail came out sharp without adjusting a single setting. Feeding through the Bowden tube was steady and calm, not the usual fight you get with TPU. It bends with just the right amount of give while staying firm enough to keep its shape. That balance makes it a strong choice for prints that need both toughness and flexibility. For a first voyage right out of the package, this filament handled the waves like a pro. Once dried and tuned it will only get better, but even as it stands PolyFlex TPU95 deserves a full five stars.

Good quality TPU, printed really well after a bit of adjustment. I've been printing 100% infill (well, very thick top/bottom thickness anyway) and when you cut a print in half you can't see layer lines, the material is 100% bonded and extremely durable. Biggest difficulty is under extrusion. Your extruder gears will not push the same amount of filament as a solid plastic, so you must calibrate your Esteps, or if you want to do it through a printing profile specifically for TPU, up your flow rate. On my MK3S I went from 100% flow rate to 120% to stop under extrusion. Retraction is difficult to tune, keep it low. I went from .8mm 35mm/s to .1mm 15mm/s on a direct drive setup. Probably the hardest part of getting good looking prints. Other than that, fairly simple. Print hot, print slow. After messing around with printing this stuff for 2 weeks the only thing I can't comment on is the longevity of the prints. Oh, and A+ on the cardboard spool. This hobby is wasteful enough without the plastic spools.

the plastic worked very well. bed adhesion was very good. almost too good. maybe a good idea to use something on the bed to act as a release. (glue stick, hair spray, tape...)

I love this TPU90, prints great, great color - just wish it was a bit cheaper. Just make sure you keep your printing speeds below 50mm/s and you'll be fine.

I love this color and a great price. :-) Prints nice and smooth.