<InPhase>
That reports 500% stretch for elasticity before breaking. I'm not sure about this property for TPU because it was so resistant to stretching that I could not stretch it that far without some sort of serious tool manipulation and significant force application.
<InPhase>
But I can confirm that a properly printed 1mm thick sheet of TPU is absolutely not destroyable by normal human hands. That stuff is tough.
<Friithian>
maybe I should make some shoes :D
<InPhase>
Hence why I figure shoes might work. :)
<Friithian>
resole my boots!
<InPhase>
What I did not test is thin printed rods of it.
<InPhase>
Obviously at some point it will get thin enough to break by hand, or thin enough that bodyweight and foot forces could break it. But I don't know what that point is.
<InPhase>
But flip-flop style straps I expect would hold up quite well.
<Friithian>
well I have 750g of this stuff to play with
<Friithian>
ooh I have print wheels with this with the dual extruders
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<InPhase>
Friithian: If you successfully print some rigid/flexible mix with dual extruders, please let me know what steps you ended up getting to work. :)
<InPhase>
I want an eventual workflow where we can pipeline that all the way from dual material specification in OpenSCAD to print.
<Friithian>
I honestly have no idea how to do dual material prints where the second material isn't just support
<Friithian>
urgh if I want to do this I have to switch the printer's print core
<InPhase>
I think this is one of the killer apps of programmatic design if we can figure it out. Multi-color would be nice for pretty things. But mixed material with programmatic control? This changes everything. If you can put rigid and flexible bits interlaced in a design, you can make components that have amazing mechanical properties.
<InPhase>
Step 1, a printed sheet that bends on only one axis.
<InPhase>
Then perhaps flex hinges.
<Friithian>
I have no idea how well this stuff will attach to other materials
<InPhase>
Elastic grippers with carefully designed dynamics of motion.
<Friithian>
PETG maybe?
<InPhase>
Yeah, I'm not sure what will attach. But I'm sure some must attach to each other.
<Friithian>
well I also got some nice PETG in this shipment so I can try with it, ABS (prob not) and PLA
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<Friithian>
gah this PVA is so fuckin waterlogged
<Friithian>
I can hear it printing
<InPhase>
The worst popping I ever got was the time I tried to print with some string trimmer line. It was both not made for printing AND had been sitting in a humid garage for years.
<Friithian>
oh god
<InPhase>
But I wanted to test out nylon. :)
<Friithian>
I hope you have a hardened nozzle
<InPhase>
It kind of almost worked, but it felt on the threshold of melting the printer.
<Friithian>
what temp?
<InPhase>
I think I was doing 240-250 or something. It was pushing the envelope.
<Friithian>
that's not too high, that's near PETG levels
<Friithian>
or is
<InPhase>
Well, I hit the specified cap for my print head. I would need an all-metal hot end to feel comfortable with that I think.
<Friithian>
aaah
<Friithian>
the printer I am mainly using is built for all sorts of materials
<Friithian>
easily does high temp stuff
<InPhase>
Yeah. This one was older and definitely not for that. :)
<Friithian>
although for the price of the print heads if it couldn't do high temp materials I would be very annoyed
<Friithian>
well this TPC-91A isn't sticking very well to the PVA
<InPhase>
Looking at the chemical structure, since TPC-91A says it's a TPU derivative, TPU and PLA have compatible ends, so you should probably be able to get the TPC-91A to stick to PLA.
<InPhase>
PVA is a different ending
<Friithian>
oh that's be useful
<Friithian>
ss\ssds
<InPhase>
PETG is... close? Should work, but if I had to guess I'd bet on PLA being the stronger bond with the TPU derivative.
<Friithian>
well I try PLA
<InPhase>
This is contingent upon the guess that to make their derivative they changed either the internal parts and not the endings, or the just changed some of the other plasticizer components or something.
<InPhase>
But probably they changed the internal parts to make it more stretchy.
<Friithian>
well we shall see. And the PLA is a lot cheaper than the PVA anyways
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<Friithian>
so I got 1.4mm into making these nails before they stopped sticking and… this is strong
<Scopeuk>
InPhase "silk" pla has some tpu blended in for surface finish, I guess it's just a matter of degree to mix "pure ones"
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<InPhase>
Friithian: Wait, are you blending the TCP-91A and PLA for nails? I thought you meant adhering a TPC-91A layer to a PLA layer, or something like that.
<Friithian>
just using the PLA as support/raft
<InPhase>
I never used a support or raft for those.
<Friithian>
it's more of a test
<InPhase>
Ok.
<Friithian>
I know I dont need it, but I am using it as a simple test that is funny
<InPhase>
Blending might be interesting though. It's conceivable that something skewed 80% PLA 20% TCP-91A might make a more robust nail.
<InPhase>
If your dual extruder supports that.
<InPhase>
Does it come out of one nozzle in that arrangement? Or is it dual nozzle?
<Friithian>
2 nozzles
<InPhase>
Okay, so no blending. Although conceivably one could smash it together a bit with the right slicing settings.
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<InPhase>
I've seen a few setups with mixing chambers, which is also interesting.
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