What is the highest performing filament that doesn’t require a heated chamber

What are the highest performing filamentsthat doesn’t require a heated chamber?

I would like to be able to make functional parts for mechanical prototypes and am trying to figure out if I need a printer with a heated chamber.

What are the higher performing (need more mechanical performance than chemical resistance) filaments I should look at more closely.


TIA

Nylon with carbon fiber shouldn’t need a heated chamber.

I have been printing Polymaker's PolyMide CoPA without a heated chamber and it seems really nice. It's a nylon 6 & 6.6 blend. I haven't had any warping issues at all. Print first layer at 260C and the rest at 265C, bed at 75C and 50mm/s speed. PEI sprint steel sheet with elmers glue stick.

Has a very high temperature resistance....I think without annealing it's 140C and with annealing rated to something like 180C.

[polymaker.com]

What sort of mechanical performance are you looking for? Temperature resistance? Yield strength? Tensile strength? Impact strength? Stiffness? Wear? Garden variety PLA actually works pretty well for a lot of lower temp applications, especially where stiffness and yield strength are more important than impact strength or ultimate tensile strength.

I've got some HDPE with glass fibre which needs 300° hot end but only 75° bed and sticks to PP tape on a glass bed

Makes pretty robust objects...

A

Enclosed chambers are simple to make with rigid foam insulation. Add temperature alarms to keep worry levels down.

I've had some phenomenal results with Priline and NylonX. They one is CF/PC and the other is Nylon/CF. Both are very rigid and strong. Neither require heated chambers, and nozzle temps are very manageable.

I've also discovered that you can really improve the quality of a print (and reduce the need for supports) by turning parts on edge at a 45 degree angle. see attached for an example of an actual configuation I printed today.

Don