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Something not clarified in the video: when amorphous, the PEKK will be translucent, while when semi-crystalline it is opaque. And the semi-crystallinity has a melting point (Tm) which is also a factor, not just a Tg.
Technically all semi-crystalline polymers can be amorphous if you inhibit the crystallinity from forming. Over time, though, even an amorphous print will eventually develop that crystallization.
It should also be noted that defining what is "better" between PEEK and PEKK will absolutely be application-based and not just determined by the material data sheets.
Last comment, PEKK may be a little easier to print, but that doesn't automatically make it better than PEEK. PEEK can also be printed amorphous with the right active cooling/ambient temperatures and that will provide some interesting potential benefits over printing it as semi-crystalline (or annealing it).
PEKK is a sweet filament and I agree with the video that it's easier to print. It does actually respond really well to being printed with active cooling or an unheated print chamber as compared to PEEK.
Really enjoying your discussions about these interesting materials. If there's any way you could do some sort of 'part strength' demo that would be great to see!
ОтветитьHow do you price out printing in peek or pekk for clients?
ОтветитьIs there a substantial dimensional change when annealing and if so, is it the same % of shrinkage each time given identical annealing treatment?
I am interested in this but i'd like to know if I can reliably print and anneal to at least 0.2mm - 0.4mm accuracy.
Love watching you guys geek out on new materials. I feel good knowing i'm not the only one ;)
This was entertaining to watch. 600-700 /kg nice
ОтветитьGreat material, awful videos - talking heads are for news readers and political geeks.
It's about the PRODUCT. I want to see it. Don't tell me, SHOW me!
What is the reason for the high price?
ОтветитьI was wondering which printers can print PEKK? Is it any that has a print temp around the 350°C mark?
ОтветитьA little ambitious printing engine mains and turbines, aren't you?
ОтветитьCan I print this on my ender 3
(I'm just joking :p)
Both PEEK and PEKK are semi crystalline in structure when below GTT. Also the more annealing you're doing the smaller the part becomes.
ОтветитьWell, I think the Continuous Use Temperature (CUT) of the printed PEEK is much higher than PEKK, other than the price advantage, no? And also if you add post-processing, then it is the higher cost of PEKK plus the cost of the post-processing and its complications.
ОтветитьI have a creatbot f430 printer. I'm trying to get a peek print, but I'm running into sticking issues on the carbon plate. What are the printing parameters you use ?
ОтветитьThanks Rob Lent.. Thanks Cole McHone.. Best regards.. Hi's from the İstanbul/Turkey
ОтветитьWhere are you two located?
ОтветитьHow much dimensional accuracy is lost during the annealing process? I know annealed PLA is pretty infamous for shrinkage in one dimension and expansion in the other two, even when packed in salt.
ОтветитьХороший материал, но слишком дорогой
Ответитьwhich is better, PEI or PEEK? GUYS
ОтветитьPlease make a video about ULTEM 1000. That's an interesting material too
Ответитьthats a big manus for a 10 min video :)
ОтветитьIs it true it's electromagnetically and radar absorbing? It would be cool to make a drone based off the X-74b with it.
ОтветитьDoes it come in carbon fiber?
ОтветитьIf only I was capable of reprogramming the print to accommodate annealing shrinkage
ОтветитьYou can have that benchy for the low low price of an entire spool of top shelf PLA. 😂
ОтветитьThere goes my cash. Going for the CF PEKK-C.
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