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Any Research on New Materials
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For the most part, if you dont need your hand held, I would steer clear from polymakers PA/PET offerings. They are geared towards printability (think open-air printers) instead of performance.
Sirayatech on the other hand, has amazing performance for very low price. I have tested a fair bit of PPA-CF (at 62$/kg and 45$/kg if you print with .5mm or larger nozzle, they have a special batch) and have been very happy. However, latest this month they are releasing PPA-gf at 45$/kg and I will have some in for testing soon.
polymaker pet-cf is fine. the differences between polymaker and bambu petcf are diminished returns
If you think it's diminishing returns to go from PM pet-cf to bambu lab pet-cf, why would you choose it over Sirayatech, which is more performant than PMs offering AND much cheaper? You can get PET-CF from ST for 37-34$/kg vs 25$/.5KG (50$/kg).
https://www.youtube.com/watch?v=6qOrv_r-rKU
PM comes in last in every test except for Impact Resistance (which is a fail) and price (because they used the 3kg price.
The PM offering was designed with printability over performance and comes in last place in creep, 3-point bending resistance, tensile, layer adhesion (enclosed)
Where is ST Pet-cf is the cheapest tested and basically always comes in either 2nd or tied for 2nd.