PETG to -18°C ?

[Nigel Crompton]

Were I to need to print something to withstand domestic freezer temperatures would PET-G do, or will I need something more esoteric ?

It's essentially a mould in which to freeze home-made "ready meals" to subsequently re-heat (sans mould!) in the camper's air-fryer. After freezing the food would be released from the mould and bagged for storage.

(Searching G. for "PET-G" & "temperature" produces the predicable, nozzle related results)

 

[olley]

Not recommended below -40c

 

[Nigel Crompton]

Ah, that'll 'do' then; another argument to put to the Accountant ...

 

[Guigsy]

You need to consider whether the material will flex enough at -18C to deal with ice expansion. And if it's food safe.

 

[Nigel Crompton]

You need to consider whether the material will flex enough

Good point ..

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[PaulandChrissy]

PET-G is food safe, but, it will probably crack at -20c. Try it. What can you loose.
Might try it myself actually.
Making a box now to fill with water and putting it in the freezer.

 

[Nigel Crompton]

Making a box now to fill with water and putting it in the freezer.

Attaboy, I don't have the facilities (yet ... )

 

[PaulandChrissy]

Attaboy, I don't have the facilities (yet ... )

Just put a small container in the freezer full of water as a first test. If it survives, I’ll make a bigger one.

 

[Guigsy]

Put the food (or test water) in a freezer bag first. Before you put it in the mold. Then you don't have to worry about safety, leaks, or cracks.

 

[Nigel Crompton]

Put the food (or test water) in a freezer bag first. Before you put it in the mold. Then you don't have to worry about safety, leaks, or cracks.

Good idea, but it'll not work for a Shepherd's Pie or Lasagne ...

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[PaulandChrissy]

You could lay cling film over the mould before placing your grub in it.This will make it easier to separate from the mould after freezing. If the cling won’t come away from the grub, just pour a little warm water over it to release it.
My tester is freezing up nicely. Will take it out in the morning.