eSUN TPE-83A
I bought this in black in hopes of printing replacement belts for tape decks, CD players and other things where belts are difficult to find. I've had some success but am still perfecting that. Meanwhile, I wanted to describe printing with the stuff. It's a bit softer than TPU-95. It's got some stretch, but not like a rubber band. If you stretch it too far, it won't return. The TPU-95 I've seen is flexible, but almost any stretch will be permanent. Softer is probably better, but anything soft is going to be difficult to print.
When I first got it, it fed OK up to the second sensor. I had to remove the tube, force it straight down past the sensor, then replace the tube. After that, it printed reasonably well, though had some stringing and build-up in places. Since then, I purchased a dryer and gave it 8 hours at 55C. I then attempted to repeat my previous loading method but was completely unsuccessful. The friction had increased and it was no longer possible to pull it through the Teflon tube. You could push it easily, but there was no way the Nextruder was going to pull this stuff!
I ended up just feeding it directly into the Nextruder, with the filament flopped over the side of the printer. I gave the spool a half turn by hand as needed, to keep it loose. Ugly, but it worked fine. The dried filament gave a better print with no stringing and no blobs or build-up.
I've heard about oiling filament but am hesitant to go down that path. Ideally this needs to be suspended above the printer and direct fed. The second sensor should be modified for lower force (mine isn't yet). I have had bed leveling fail due, I think, to small amounts of filament building up where the nozzle touches and confusing the system. Be sure everything, including the nozzle, is clean. I used the satin plate. The parts are a bit difficult to remove. Once you get a little lift on one edge, they peel off easily enough but getting that first bit of lift can be difficult and even risks damaging the part. The filament has the feel of rubber O-ring cord and would make good tires for RC cars and such. Also good for grips and cases. I used the generic FLEX settings to print.
IMHO, this is a great material to have in your collection, just remember it needs the same special techniques as other soft materials.
If you're a tech nerd, a search will give you the differences between TPE and TPU.
RE:
Nice write-up! I do that same for TPU AIR and PEBA AIR, I feed it directly into the Nextruder.
If you want to try something that better approximates rubber, use PEBA. I don't use TPU or TPE anymore and use PEBA instead.
If you install the bogie and Nextruder sensor mods for Flex material its a lot easier to load and less likely to get wrapped up in the Nextruder gear. One trick for getting it off the plate is the drop IPA around the edges. It will wick underneath the part.