SainSmart101-90-163 Red Flexible TPU 3D Printing Filament, 1.75 mm, 0.8 kg, Dimensional Accuracy +/- 0.05 mm

My first time printing TPU with my FLSUN V400, and this filament worked great at 220C. The end product was not as squishy as I had expected, but the Yellow transparent color is incredible, and pieces really fluoresce brightly under just a little UV light.

Always consistent size and quality. It’s my go to filament for TPU!

I bought some TPU from them and originally it printed great. Soon after the material was printing terrible. I contacted customer service as soon as I started to dry the material. They were very responsive an offered a replacement spool but once the material was dried it printed great. I would buy from them again in a heartbeat (Sainsmart).

I bought this in black and yellow, waiting on the multi-color pack to get back in stock now. I spent a week in hell, as I was new to FLEX and had to learn some things the hard way. Punch line: this is AWESOME filament! The yellow looks like a glowing fiber optic when light is nearby, it is simply marvelous!! They are both extremely strong, but also soft and lustrous. Super elastic. You can take the single skirt extrusion and stretch it to perhaps 10 times it's size without breaking, but the material seems to remain slightly stretched if you do that, perhaps 30-60%, but after that it always snaps back to that size. Ordinary prints are super strong and hold their shape perfectly.Here are the bottom line lessons learned if you are new to TPU: LOOSEN THE IDLER!; start at 15-20mm/s for everything except travel; be certain your 1st layer is dialed in well for this filament; and TURN OFF RETRACTION. TPU will wrap itself around your extruder gear, or jam, and speed and retraction are the enemy here. Get it to print, enjoy how amazing it is and be happy, and optimize from there!I have a Prusa i3 MK3. My original hell began on this, and I naively tried to use the stock profile for Sainsmart TPU (I mean, it was there, right?). It seemed to work, but ended up dying mid print, almost always. Ended up wrapped around the extruder gear. Annoying to open things up and unravel it. Rinse and repeat, no joy. Played with very many settings, read very many blogs. Nothing worked.Finally blew the dust off my MK3S upgrade kit, bit the bullet, and spent a bunch of hours tearing down and rebuilding my extruder. Tried again, this time switching to the much more expensive *good filament* I bought (Ninjatek). IT JAMMED AGAIN. WORSE. OVER AND OVER. Finally, it basically tied a knot around the gear and I had to do a 50% disassembly of the extruder to get it out (luckily the MK3S upgrade anticipates this and it's easy).Ditched the Ninjatek (I really dislike that filament, it's expensive, has a dull luster, is too soft, and even harder to print, what a bunch of overhype!). Read a bunch more blogs, and finally realized the only real problem was trying to use the stock profile. The answer was go extreme at first, and optimize after you are happy and can go from there. Here are the full changes I made to the stock Sainsmart profile to start with:- Everybody says "loosen the idler"....but to what?! I had to loosen the idler almost entirely, for me almost the entire screw head was jutting out, and perhaps 1-2 turns of the screw were in the nut. This is super important, and I found you can find the sweet spot by starting loosest (screw just biting), try to load, and tighten until it loads, then stop! Experiment from there.- Bed Temp 70 deg C- Extruder Temp 235 deg C- All print speeds 15mm/s (keeping fast travel speed seemed fine, if a little stringy)- Turned off "keep fan always on"- Enabled auto cooling- Turned off retraction! (in Prusaslic3r this is in the printer settings tab under Extruder 1)I have so far turned the speed up to 35mm/s for infill and it seems to work fine, others say 40mm/s works.I love this filament. After a week of misery, once tuned in it just works every time, good luck!

I'm choose the Sain Smart TPU sure to the reviews on Amazon. In general, my printer is dialed in very well. I have a QIDI X-Max II. The detail in the print is as good as PLA prints, but that where the similarities end. TPU is a very flexible material good for phone cases, watch bands, etc. The Sain Smart printer does give excellent results free from stringing, it has excellent layer adhesion and comes off the printer with minimal post print work needed. I will buy again if I need more TPU in the future.

It's nothing to dislike, once you have your printer set it's a piece of cake. Here is set I use cura tpu set up, only use sainsmart because of the heat to work is 210 to 220 and when you use cura tpu set it set to 228 which is what give excellent prints every time.

I've been using this TPU (probably 20 colors) for 4+ years now, and it is by far the best I have found. Great colors and durability. I'm printing at 220c with 50c bed, fwiw. (ender3 and cr10)

This brand does great TPU, I haven't tried another brand of tpu but when it's this good, there's no need to. I know it well that it can come out consistently every time. I really like how it looks just like rubber, which it's gleaming shine.I can't really think of what I dislike about it. it's a different filament that I am used to using, so it does take some testing to get it right.

You have to hit the 'sweet spot' but once you find it, it prints well every time.In comparison to rigid ink TPU I'd say that rigid ink TPU was easier to print with, but it was completely impossible to remove the print without damaging it, this stuff is easy to remove and easy to separate from support material. The rigid ink TPU printed more successful overhangs, but SainSmart works well with support material so that balances out. The main advantage of course is this is available in a range of colours.I've printed a toy tractor tyre and a synchronous belt (seen in picture below), I found the right settings through trial and error.I'm using a FlashForge Creator Pro with Simplify3D software and the following settings:1500mm/min printing speed with 50%, 80%, 80% for outline, solid and support respectively.210 degrees C nozzle temp and 70 degrees C buildplate0.1 layer height and 6 layers top/bottom and 4 outline.I always use a raft and it separates well from it.The real interesting setting I changed was I set the extrusion width to 0.37mm and extrusion multiplier to 1.10 (i.e. I wanted it to squeeze more material out into a smaller space as I found the extrusion layers were very visible and resulted in poor layer adhesion within each layer).I

This is the first semi-flexible filament I have printed. I printed a new extruder first to make sure the filament path was well constrained so that this filament wouldn't kink between the feed gear and the PTFE throat. I have had no problems printing this filament using my upgraded MK10 extruder. I have tried 20-40mm/S and print quality doesn't degrade at this speed. I probably wont try print this any faster, I feel that would be pushing my luck.I am quite disappointed to knock a star off such a good filament. It is a pity the seller sells this as a "approximately 1KG roll". I suppose that is true, 800g is "approximately 1KG". But it clearly states on the roll that it is 800 grams of TPU. Why advertise otherwise?

An excellent, flexible filament that produces good results.The finished product is very flexible and will stretch or bend a long way before coming apart.Probably best printed with an extruder mounted to the head, but I printed using a bowden system.Retract doesn't work because of the flexible nature of the filament.Make sure the distance between your extruder gear and nozzle is as small as possible otherwise it will buckle up.Top layers printed on a 10% fill struggled to bridge the gap and took several passes before covering.Perhaps a higher percentage, e.g. > 50% fill should be used?

Love printing with this stuff! Wish I could afford to get more quickly.You'll need to get your nozzle more hot than usual, I run at 240°C as opposed to my usual 200°C. Once you've reached temperature it prints beautifully on a cold bed. Also, depending on layer size play around with the temperature slightly. When it runs a bit too hot it comes out sort of matte with a silver sheen. When it comes out just right it's this rich, shiny black.

Printed at 210 on a cold bed with a 0.5mm nozzle. Absolutely perfect results first time - it's a lovely material mechanically and visually - not really squishy but flexible enough for rubber washers and gaskets - I've printed isolating bushes for my CoreXY motors and it is perfect. I print with all manner or materials, and this is now my go-to flexible filament.