Quote: Originally Posted by Unicr0nhunter
Yeah but there have been reports (one at themodzoo iirc. EDIT: link
) of PETG tube melting in the event of a momentary pump failure, something nylon tube nor acrylic is prone to do before a system powers down for a thermal event. Seems PETG has a lower melting point that could lead to a bad situation becoming something catastrophic.
I also would like to know more how PETG holds up over the long term seeing as it is not listed as being UV resistant like Acrylic. What effects, if any, will sunlight or UV case lighting have on it?
BTW, here's a vid B Negative posted in the acrylic pipebending 101 thread that probably belongs here just as well ...
Now ordinarily i would NEVER resurrect a thread from the dead, but this particular thread is a #1 google search for PETG VS ACRYLIC. If that's the case, it hurts me to see this thread so full of incorrect information. I melted a processor due to incorrect information presented in such fashion.
I'll start with this comment.
PETG does not have a lower melting point than ACRYLIC. In fact acrylic's melting point is roughly HALF of PETGS. You could stick PETG in the oven with a tombstone pizza and it should survive. Acrylic, however, has a melting point of about 160C, still not a temp you should be anywhere near as your cpu thermals itself into a shutdown.
Whatever video you cite, it seems much more likely they were using acrylic not petg.
Also i see all this talk about strength of the tubes. Come on. I mean really come on. You can throw out any engineering terms you want to describe these tubes, but miss the point entirely. As an engineer i'll tell you right now it wont come down to rigidity, tensile, torsional, nor elasticity, but a combination of all of these. Look for what you need the tube to do and ask yourself that question. It would be foolish to say acrylic isn't strong, its the same base as polycarbonate (the bulletproof stuff). PETG is known for its manufacturability.
And permeability? Come on. Everything is permeable by definition. Other than a nice gentleman explained how PETG is used largely in the bottling industry (should have been good enough information) The permeability issue... simply is not an issue. Consider it like a PVC as far as permeability goes. Its not too indifferent. PVC by the way are those schedule 40 pipes in your house rated to 600psi water pressure. PVC is also that stuff we used before hard pipes were a 'thing'. But to hell with my rambling, here's some of that awesome thing we call DATA: http://www.pod-sabic-ip.com/KBAM/Ref...il/10620_4.pdf
Personally... my case weighs like 80lbs. While it shouldn't REALLY be a LAN case, it looks bad ass, so i still lug it around to LANs. And like mentioned above, heavy cases twist, especially with an uneven load. Think your rig might be heavy? Look up the coreX9. It takes up my entire back-seat ffs. For myself, i would want something that's not prone to hairline cracking (i'm not saying acrylic DOES but it certainly can a lot easier than PETG). Also would want something that's pretty okay with some unintentional flex, for if intentional flex was our build goal, we wouldn't be having this discussion.
It comes down to this:
What do you want in a tube? Your answer could correctly land you at either PETG or ACRYLIC. There's no wrong answer.