What filament is good for an airless ball?
an airless filament, or at least a very dry one…Personally, I’d go for TPU
The best is PEBA.
I’m not saying this is the best, I don’t have any experience with it… but BIQU has a filament specifically for printing airless basketballs. Regardless of which one you pick please let us know how it comes out.
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I am old and am sure I missing something here, like the point of it all.
If I wanted a basketball, or any other more or less bouncy ball, would it be too obvious if I just buy one ?
Just looked and I could get a cheap standard one for $5 locally…
I could buy at least 10 for the price of one roll of PEBA or other dedicated filament but how many basketballs that work and and bounce like can I print with one roll ?
If airless is the way to go why isn’t anything letting the NBA in on this secret ???
They use a ton of balls per season, imagine they could bring their printer along and print their own balls on the go…
With things like these I often wonder what came first…
Was it the need that created the product or was it clever product advertising and promoting that created a need that did not exist before ?
It’s not that deep, people just wanna print it for fun
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Oh, airless balls… Nevermind. 
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I assume you mean airless basketball? I’ve used BIQU, Ataraxia Bouncy FPLA, and Wisdream FlexiTough, all with similar results. They all make a nice ball and have similar rebound (what we call bounce). Their bounce is about 85% of a regulation NBA size 7 ball.
Kimya who made that has exited the filament business. Unfortunately I did not get a chance to try it.