Safe Printing Temps
PTFE is a flouropolymer, which exists in a state of matter known as a "glass." This means it does not "melt," like an ice cube, but rather slowly gets softer and softer as it gets warmer. Eventually it will either become a liquid, or catch fire.
Between room temperature and catching fire, all polymers emit tiny amounts of harmful gasses, known as
"off-gassing." The hotter they get, the more they will emit. See Chart*
Because our PTFE tends to have better temperature resistance (meaning it stays firmer at higher temperatures before significant deformation) than lower quality PTFE tubes, a number of users have reported success using it "inside the hot end."
This is not something you should do willy-nilly. Just because it works, doesn't mean there aren't precautions to be taken. If you use PTFE, or any polymer for that matter, inside the hot end or anywhere excessive temperatures may be experienced, you will potentially create harmful off-gassing. Not only that, but the polymer you are extruding may be creating harmful gasses as well.
We strongly recommend running your 3D printer in a well ventilated area, away from children and pets.
In a classroom environment, we encourage printing with PLA, and staying away from higher temperature materials, whether you use our Bowden tubing or not.
Always have adult supervision when operating a 3D printer.
Keep razor-sharp Bowden tubing cutters out of reach of children.
Have fun, and stay safe out there!