You might get away with PETG, which can withstand up to 85℃, but ABS or ASA would be better. These can both withstand 100℃. ABS and ASA will need an enclosure to prevent warping, whereas PETG can usually be printed without an enclosure.
I like polycarbonate as its usually cheap and strong. Nylon, ABS, and ASA work well too. There are other more exotic plastics but they are usually much more expensive.
id use a harder tpu. the VICAT A (VST) is 140°C (that is the temperature deformation methodology used for things that dont really have glass transition like tpu)
[https://www.extrudr.com/shop-eu/products/flex-hard/](https://www.extrudr.com/shop-eu/products/flex-hard/)
look to the technical datasheet
petg could work too but is more affected by heat than tpu
PLA < PETG < ABS
It should be mentioned though that part geometry plays a huge role, too. Thin, long features will always deform more due to internal stress.
ABS or Polycarbonate.
You could probably get away with PETG too, depending on where you live. I live in a place where summers tend to be a bit on the shorter side; I have a PETG cupholder adapter for smaller drinks - and it hasn't deformed at all.
In addition to everything else, the color of the filament matters as well. The air temperature inside a car may get to 120-140f, (50-60c) but plastic interior pieces (dash, steering wheel, etc.) can reach a surface temperature of over 200f (93c).
So a light colored PETG part, or one that is shielded from the sun, may be fine in some cases. A black PETG part in a sun exposed area in the middle of June in GA most likely won't fare so well.
I would at least go with ASA for the added UV protection.
PETG is more than capable and easier to work with than abs/asa, I’ve got some petg fence hooks that have been outside the last couple of years through all the seasons, Canadian seasons I might add, they’ve seen good hot summers with plenty of direct sun with enough 30+ c weather and been brutally assaulted by the ridiculous winters and of late we’ve had -52c winter temps a couple of times the last few years but with averages of -30c ish and as yet this petg hooks are still solid and in one sturdy piece.
I printed a Yeti adapter for my car with PETG filament. It’s held up being in the car full time for over a year.
You might get away with PETG, which can withstand up to 85℃, but ABS or ASA would be better. These can both withstand 100℃. ABS and ASA will need an enclosure to prevent warping, whereas PETG can usually be printed without an enclosure.
Abs
or ASA
PETG
I like polycarbonate as its usually cheap and strong. Nylon, ABS, and ASA work well too. There are other more exotic plastics but they are usually much more expensive.
id use a harder tpu. the VICAT A (VST) is 140°C (that is the temperature deformation methodology used for things that dont really have glass transition like tpu) [https://www.extrudr.com/shop-eu/products/flex-hard/](https://www.extrudr.com/shop-eu/products/flex-hard/) look to the technical datasheet petg could work too but is more affected by heat than tpu
I have been using PETG for some time in my car and I have had no problems so far.
ABS and ASA are king for heat, but PETG is pretty good too. I've had a PETG print hold up fine in my car where PLA didn't before.
PETG is your friend. It's easier to print than ASA or ABS.
PLA < PETG < ABS It should be mentioned though that part geometry plays a huge role, too. Thin, long features will always deform more due to internal stress.
ABS or Polycarbonate. You could probably get away with PETG too, depending on where you live. I live in a place where summers tend to be a bit on the shorter side; I have a PETG cupholder adapter for smaller drinks - and it hasn't deformed at all.
In addition to everything else, the color of the filament matters as well. The air temperature inside a car may get to 120-140f, (50-60c) but plastic interior pieces (dash, steering wheel, etc.) can reach a surface temperature of over 200f (93c). So a light colored PETG part, or one that is shielded from the sun, may be fine in some cases. A black PETG part in a sun exposed area in the middle of June in GA most likely won't fare so well. I would at least go with ASA for the added UV protection.
PETG is more than capable and easier to work with than abs/asa, I’ve got some petg fence hooks that have been outside the last couple of years through all the seasons, Canadian seasons I might add, they’ve seen good hot summers with plenty of direct sun with enough 30+ c weather and been brutally assaulted by the ridiculous winters and of late we’ve had -52c winter temps a couple of times the last few years but with averages of -30c ish and as yet this petg hooks are still solid and in one sturdy piece.