I'm looking to 3D print a structure that won't deform in high heat, up to about 220 °C. The filament itself can be 3D printed all the way up to about 380 °C.
PEI seems like it could be a viable option. I found some here. This PEI filament specifies the glass transition temperature at 217 °C.
Would this filament work? Are there any other types of materials that would fulfill this engineering requirement?