Siraya Tech Fibreheart PET-CF 3D Filament - Carbon Fiber Reinforced, High Strength & Rigidity, Easy Print, Dimensionally Stable, Aluminum Foil Sealed Bag - for Strong and Precise Parts (Black, 1kg)

I have no idea how they pulled it off, but this filament has some of the most insane layer adhesion I've ever seen. And it bonds so aggressively to the bed that it actually fused to my textured PEI plate at 80°C. I had to switch to smooth PEI + glue stick at 50°C just to tame the adhesion to a usable level—and it worked. The glass fiber reinforcement makes it incredibly tough, stabilizes the material, and virtually eliminates warping, so small prints come out great even without a heated chamber. Thanks to the glass fibers, the surface has this beautiful, elegant, non-reflective matte texture that completely masks layer lines—but only at 0.15 mm layer height (or finer). Any higher (like 0.20 mm and up), and the lines start to show. It prints flawlessly at 80 mm/s with a 305°C nozzle temperature. Unfortunately, that's a bit past the limit of the Bambu-style hotend I'm using, but so far it's holding up pretty well. I'm genuinely impressed. The parts come out right the first time with accuracy and uniformity that put ASA and ABS to shame. I did dry the filament for 24 hours, but honestly it seemed printable straight out of the package. The team at Siraya clearly aren't messing around—they know how to get things done. I've never consistently hit 0.1 mm dimensional accuracy with any other filament so effortlessly; it was always 0.4 mm or worse and required endless tweaking. But yeah, I did ruin a build plate because of the ridiculous adhesion—but it's totally my fault. I was completely unprepared for such a game-changing material. I can finally print thin parts with confidence, and I no longer have to make multiple copies just to get a perfect fitment.

Print recommendations: Elegoo Centuri Carbon .6 nozzle @ 320 Bed 100 Keep the chamber as hot as possible .96flow Print under 100mm/sex No fans Ensure your extruder gears are tight! This stuff requires some grunt to unwind. This filament took some trial and error to get it to print reliably in my Elegoo Centuri Carbon. I started printing with a .4 nozzle at 300 degrees using one of the generic filament profiles. It worked for a few small prints but after that I had numerous failures. I switched to a .6 and still had issues. After tightening my extruder gears to about half it made all the difference. I've gotten through some larger prints using the settings above. Seems to be printing well with no adhesion issues using a PEI plate with glue stick. Note this stuff is insanely rigid. I had to add a riser to my printer and ensure the Bowden tube doesn't bend too far or it will snap and your print will pause/fail. I also had to weigh my dry box down because it was lifting it due to the filament being so rigid during unwinding. I was able to print straight from the package without drying. Did I mention this stuff is rigid? It's crazy rigid and strong. Overall this filament is amazing and seems so much stronger than PA6-CF but it is a little trickier to use. I really want to get back to a .4 nozzle and am hopping my changes will allow me to. I hope prices continue to come down as I would likely use this over my normal PA6-CF that's about 30% cheaper.

I printed a mechanical piece that I had printed with PLA Professional. Using that filament, everything fit and worked properly. I found this needed 290 nozzle and 90 bed in a Creality soft-sided enclosure on an Aritllery X4 Plus S1 using it's PEI sheet with glue stick. I printed on the Y axis. At 280/80 one side of the base layer pulled loose when the oblong item was printed aligned on the X axis. I printed a .2mm layer height at 100mm/s with fans 20-60%, 2mm retraction @ 40mm/s and 100% infill. See below for print setting conflicts. I used this filament right out of the bag, as it says on the site not to dry it unless you have problems. Once the part printed, I was able to get the supports out relatively easily, and the surface while not smooth was decent. This portion was a marked improvement over the Overture Easy Nylon I tried before. I then removed an internal metal support from the same model in PLA plus and it would not fit into the same opening. I tried to push it into place and the front portion of the pocket cracked, turning the model into 3 pieces. This material is very brittle. A second larger metallic piece designed to be removable fit most of the way in, but jammed once seated. It easily pulls in and out of the PLA plus. I have deducted one star for various reasons- 1. The print settings vary between what is on the bag (I got old stock marked PAHT) and what is on the website. 2. The shrinkage made my item unusable. I'll have to experiment to get the enlargement right in Cura. UPDATE- can't be done, see below. If you go by the label on the bag, here are the print settings: Nozzle 280-300 Bed 80-100 Speed 30-220 Fan 0-80 On the spool, it says Nozzle 280-300 (same) Bed 80-100 (same) Speed 30-200 (slightly lower) Fan 0-80 (same) On their website (product page), it says this: Nozzle 260-280 (lower) Bed 70-80 (lower) Speed 30-120 (lower) Fan 20-60 (lower) On their website's user guide, it says this: Nozzle Temperature 280-300 (same as bag) Bed 70-80 (lower than bag, same as product page) Speed 30-120 (same as product page) Fan 20-60 (same as product page) UPDATE- Reduced to 2 stars. This material is just not suited for precision printing. I adjusted my model in Cura after measuring the failed piece and one that printed OK as-is in PLA Professional. I added 7% to X and 2% to Y and Z. I also reduced layer height to .16. While the support fit in the pocket this time, the locking pin that holds it in place would not go all the way through. It started on one side, and it ended up cracking in the exact same spot as before when I tried to drive it into place as designed- something PLA Pro has no problem with. I also found there was too much slack for the other part that fit into the model. Seems like nice material, but just not suited for what I needed it for. You shouldn't have to spend so much time dialing in shrinkage for such an expensive filament when filaments that are about 1/3 the cost don't have this problem. UPDATE 2- The seller contacted me and advised the website setting were correct, then offered to refund my money. Revised up to 5 stars, that is how to correct a problem.

Top!!! Lässt sich super drucken. Zero Warp. Perfekte interlayer Haftung. Bislang keine Probleme durch Materialzuführung vom AMS-HT.

寸法精度が良くて扱いやすいエンプラとして使ってみました。 Bambu P1Sでプリントしました。Siraya Techに印刷プロファイルがあるのでそれをすこし変更して使いました。SuperTackのプレート温度が35度でしたが65度に変更しました。 Smooth PEIは使わないほうが良いです。定着が良すぎてプレートを壊してしまいました。SuperTack推奨です。ベッド温度が低くできて白化しにくくなります。 他のエンプラと違って湿気にも強くリーズナブルでとても良い。 ー追記ー Smooth PEIですがのり（ケープ3Dエクストラキープ）を使えば無事に剥離できました。

Il PET-CF (non PETG!!) è il mio filamento "ingegneristico" preferito, resiste a temperature altissime, non diventa morbido con il calore, non si deforma sotto sforzo, non si restringe dopo averlo stampato (quasi l'opposto dell'ABS) e questo in particolare è veramente semplice da stampare usando i profili che Siraya Tech include. Attenzione però, Siraya usa delle fibre di carbonio abbastanza lunghe per avere un filamento più forte ma questo vuol dire che stampandolo con un ugello da 0.4mm è quasi garantito che si intasi, e poi pulirlo è praticamente impossibile. Con uno 0.6 ho avuto 0 problemi, e le parti escono comunque molto belle.

Materiale ottimo. Quello che stampo a temperatura più alta di tutti. I parametri di stampa per la mia K1C sono copiati dal sito del produttore ed adattati per Creality Print. Perfetto al primo colpo. Resistentissimo. Rigido. Ottima finitura layer e superficiale.

Amazing filament and works well at 300c on my P1S, has some seriously impressive properties as seen on MyTechFun but prints easy too. Stronger in multiple ways than Peek at a fraction of the price. Bambu will need to drop the cost of their PPA CF if they want to compete with this one! Can withstand 200c ambient temps without any issues so great for printing desiccant holders that you don’t need to empty to recharge in an oven. Considerations: Prior to melting the filament is extremely brittle and abrasive so do not use in an AMS or similar MMS. Instead used an external spool with a short Bowden tube and no sharp bends. I used a heated chamber mod but have also seen great results at ambient. If you are using Bambu Studio select their PPA-CF (as of the date of posting theirs not a generic one) and edit the filament settings to 300c. The results are great but it’s certainly not for beginners, it won’t load via the standard Bambu loading method (as this goes up to 250c) so you’ll need to manually set the printer to 300c and hit extrude yourself to purge and extrude it. Conclusion: Siraya are barely known in the FDM market (more so resin for SLA) so for their first few filaments to be this good is pretty disruptive and it’s priced extremely well. Looking forward to trying their PPA CF Core once it’s available in the UK.