Polymax Tough PC Filament 1.75mm, Black Polycarbonate Filament 1.75mm 0.75kg Cardboard Spool - PC Filament 3D Printer Polycarbonate Filament, Tough & High Heat Resistant

This filament is excellent. I bought it on sale for something around 40% off and it was well worth it. It took me several weeks to dial it in, the TDS on their website is not very helpful and I have not seen more than two mentions of this filament on reddit, neither of which went into any detail regarding actually printing it. I print this at 260 for the first layer, 270 for the rest. 100C for the bed and have settled around 65-70C for the chamber. I had severe issues with heat creep initially, PolyMaker states it is unable to be printed without an enclosure that reaches a minimum of 100C! Not many consumers have that kind of set up and I had to heavily modify my P1S to be able to do this. If you attempt at chamber temps above 80C, you will run into immediate heat creep. It prints fantastic at 65, I would probably not even worry about doing it at 55 or 50 if you really can't get it any higher. Like all other engineering filaments, just turn off that aux fan, part fan super low, print speed very low, and steady temps. I have been able to print objects well above 8"x8" with these settings on my P1S. Stock P1S will likely not be able to successfully print this stuff, I utilize forced air heating and a thermistor in the chamber to maintain temps +/- 1C. I was very frustrated with PM's claim that it required such ridiculous temperatures when PBT *should* print more like PLA in regards to temp. It prints well on many surfaces, I've printed with elmers glue stick on PEI as well as with bed weld on glass/borosilicate and epoxy plates. I would recommend using a flex plate if using bed weld or epoxy plates, it will bond strongly to the surface. This filament is rubbery, very much so, advised to have a clean extruder and new teeth on extruder gears. I always print from an actively heated dry box, no greater than 18% RH for best results. It can handle overhangs, and many of the challenges that ABS really struggles with, although I would likely not use this in many of the cases in which I would utilize ABS/ASA. I suspect part of this blend is PETG to increase printability, as seems to be the case with a lot of filaments nowadays, but this doesn't seem to significantly impact performance. It is *tough*, much more so than I thought it would be. It doesn't shatter when it breaks and I have had no cascading failures, it seems about as tough as ABS while having some of the desirable qualities of PC. I would prefer if this were pure PBT to be completely honest, but a little PC in there for strength does this filament well. I don't know if PM will ever restock this filament? I have been waiting almost a month for it to come back in natural color (I love that color) but the price just keeps going up and they only have it in the larger diameter... Glad I got it while I could I guess, trying to use it sparingly since it is so well suited for many niche cases. Excited to try it out in the winter for that cold resistance, I'm expecting it to crack at some point in the season, and especially if used for any kind of load bearing. I will be purchasing several spools of this as soon as it comes back in stock, I can promise you that, I have loved everything I've printed with it, and in my opinion PBT should have a much larger presence in the FDM scene, it is a serious plastic! Compare the TDS of PBT to your ABSs and Nylons and you will be very surprised that this seems almost like a super-plastic. Once it comes back, I would highly recommend experienced printers to purchase a few rolls of it. *do not try to print this with a cardboard box over your bed slinger, please*. The picture is a mouse body of PC-PBT and ABS keycaps.

Perfect prints with the centauri carbon using .6 nozzle. (Haven't tried .4) Also very little stink. Only con is I wish the prints weren't so shiny.... Be awesome if polymaker would offer it with glass fiber. Overall excellent filament.

Polymaker has been one of my favorite filament brands for as long as I can remember and this PolyMaxPC is phenomenal for strength! I absolutely love how cleanly it prints and is not only one of the easiest filaments I print with, but also one of the most durable! - I will DEFINITELY say, it likes it HOT! - I get fantastic results with an enclosure, 110 bed temp (it’s worth the extra heat to keep adhesion up and warping down!) - I use 260 nozzle temp with low retraction and cooling to prevent any stringing! - The prints look amazing to me and I couldn’t be happier with the results of the work this filament puts in strength wise! - Hands down would buy this again and again! 10/10

Fairly hard to print without an enclosure without warping. Need a big brim and I used some other custom settings to get better adhesion. Keep in mind this was on an Ender 3 so take that for what it's worth. Consistent once you figure it out and keep it dry. Used this for RC differentials, and it did crack. One of the more stressful use cases, but PCCF has been working better since then.

Good and strong material. Able to print with chamber temps in the 65C range. If you are having issues with bed adhesion make sure bed is clean and if needed use some adhesive. From my experience the white is equivalent in strength reduction from virgin material. I'm really curious to see how well this material holds up with 24/7 365 exposure to UV.

This is the strongest filament I’ve printed so far. It’s good stuff. I used a Creality K1C printer and had to max the bed temp at 100C and use plenty of glue. I printed straight after opening the filament but I did print from a dryer box. It printed just fine with smooth layer lines indicating the place that manufactures the filament ensures it’s dry prior to vacuum sealing it. I will be buying more in the future. One thing to note, this is not a material you want to print often, especially if you don’t have proper air filtration. The package clearly states this material can cause cancer. I had my printer near an open window for ventilation, I didn’t notice much of an odor and nothing smelled toxic. Polycarbonate is known for being tough to print, this is my first time printing it and it went smoothly. I think that’s partially due to this being good quality filament.

Very good quality, not very hygroscopic, and very consistent. I have used a lot of this filament and highly recommend anything overture sells.

Printed the.jabberwoky out of petG as the E5 plus is not enclosed. It began to soften on the second print of abs filament. Nearly out, I decided to print it in polycarbonate. The black pieces are pure PC. Got the plolymaker blue PC blend of abs. Much easier to print on the Voron 2.4 R2 fully enclosed. CONCH Hotend 305C bed at 85C enclosure 52C.