PRILINEEngineering Carbon Fiber and Polycarbonate 1KG 1.75mm 3D Printer Filament,1kg Spool,Black/White PN- PCblack

Wish I could leave two separate reviews, because these are two completely different products.Plain polycarbonate filament: 3/5 starsCarbon fiber polycarbonate: 5/5 stars=====Plain polycarbonate filamentAs other reviewers have mentioned, the polycarbonate filament seems to be a blend with ABS. It melts at about the same temperatures as ABS. It doesn't have as much of a styrene smell as ABS but it's definitely there, and it doesn't warp as bad as ABS but it still warps. I find it weird, because PRILINE's carbon fiber polycarbonate filament doesn't seem to do that at all.That said, it's a usable filament. Just don't expect actual polycarbonate but instead a PC/ABS blend. Which I find silly, because there are some people that actively seek out PC/ABS blends because of their ease of printing with printers without full-metal hotends, and this seems to be that. If it was labelled as such, I could probably give it a 5-star review.=====Carbon fiber polycarbonateTheir carbon fiber polycarbonate, on the other hand, is an amazing filament that prints absolutely beautifully. Far better than any other carbon fiber filament I've ever used. Prints with a perfect surface finish, doesn't smell, doesn't warp, excellent layer adhesion, consistent diameter, doesn't clog nozzles. Not enough good I can say about it.Just keep in mind the potential safety issues (and current research into the topic) surrounding carbon fiber and carbon nanotubes, particularly surrounding lung issues. Much like asbestos, it seems to be considered safe when fully contained in a binder like polycarbonate, but can be problematic when broken. Think of how many times pieces of your parts break off, from supports to stringies between non-printing moves, and just use some caution. But that can be said of any carbon fiber filament, not just this one.

I have a Qidi Tech X-MAX printer, hardened nozzle Extruder B (0.4mm). With this black PRILINE PC 1.75 3D printer filament, it really took some dialing in. I downloaded the xyz calibration cube off thingiverse and it took 14 prints with tweaks back and forth with Qidi tech support, in order to get it really perfected. They provide a Qidi Print profile for PolyCarbonate, but it was WAY off. This material is NOT true PC, it's heavily mixed with something else. I hope it withstands temperatures decent enough as my plan was to make parts that go inside of a car (not in the engine bay, around the seat/dash area). I need PC to not bend/warp in extreme temperatures cars can reach in the summer.Here are my print settings for my X-Max, YMMV, but hopefully this helps someone else.- Flow 100%- Enable retraction 5mm @ 70mm/s and retract at layer change- Enable coasting 0.1mm3, min vol 0.17mm3, 90% speed, 0.2mm outer wall wipe distance- Layer height 0.2mm, initial height 0.3mm, line width 0.4mm- Wall line count 2, top layers 8, bottom layers 3- Optimize wall printing order- Infill density 55% cubic pattern- 10% skip overlap, 20% infill overlap- Print in advance- Skirt build plate adhesion type, 2 line count, 4mm distance, 20mm/s speed- Print speed 50mm/s, wall speed 25mm/s, top/bottom speed 40mm/s, support speed 40mm/s- Travel speed 200mm/s, min layer time 15s- Temperature 235C, initial layer 240C- Build plate temp 90C, initial layer 100C- Enable print cooling, enable chamber loop (specific to enclosed printers like mine)- Add support everywhere, overhang angle 45, zig zag pattern, 40% support density- Enable Travel Prime, 100% rateUPDATE 1I spoke with priline support and they have went above and beyond for me. Increasing from 4 stars to 5 stars.

This PC filament prints well in my Bambu Lab P1s using the Generic PC settings.I have also contacted Priline via FB messenger for some support questions; they were quick to reply, even on the weekend.I have used several different Priline filaments and had good success with all of them, including this PC. The price is good as well.

This polycarbonate might be 5 times stronger than ABS. It's less flexible, and eventually breaks rather than just bend, but it requires far more force to bend it. Mechanical support parts, like walls, can have thinner sections.Shrinkage is nil. A test print, 5x5x127mm (.2x.2x5 inches) actually lengthened by .5 mm. I turned it 45 degrees on the build plate and expansion was .25mm. Platform is 100C. Extrusion temp was 230C. Surface was good.I first used 260C but that was too hot. I have a small fan shroud pointed at the part, but it wasn't enough. This stuff might print even better at less than 230.Removing a raft or supports will be more difficult only because this stuff has strong layer adhesion, comparable to nylon... but with none of nylon's flex. Adhesion to the bed (perforated board... Afinia printer) was strong and release was smooth and easy.Rather than go fetch a 1/2 inch socket, being curious, I printed one from this stuff. It worked fine.. felt strong. I feel confident that you could print very lightweight tools, like wrenches, with it.

My star rating may not reflect what I'm about to say, but I'm assuming its me not having the proper print set up to print this PC. I don't have a heated enclosure.No matter what print settings I try, what temps, what speeds, what tricks, the layer adhesion for this stuff is awful. The parts end up significantly weaker than petg or pla because of this which makes it useless for me.Their PC with carbon fiber doesn't seem to share this issue, I can print it, no enclosure, and end up with parts I have to beat with a hammer to break.I'd avoid this if you don't have a heated enclosure. If you do have one, I'm still unsure. I'll update if I ever get around to trying it with one.