? petg & tpu target humidity level for vacuum sealing?

Communities DIY Corner
, ,
1

after a run in a Dryer/Dehydrator what target humidity level should i try to reach with this petg roll before use in the 3dprinter ?

i want to run the petg & tpu threw the dryer an the vacuum seal till im ready to use

right now iv got a petg roll fresh delivered from amazon in its currently been in the dryer for 1-1/2hr now of a 4 to 6hr run at the recommended 65c

an the relative humidity say 22 what exactly does the mean an what do i aim for before vacuum sealing ?

2

rule of thumb is listen carefully as it’s extruding. you should not hear any popping. my humidity sensors are around 20% or less in the dry boxes I have and it seems okay but this is really not very precise or reasoned instructions just where I’ve come to do over the years

3 Likes
3

As long as you Dry for a sufficient time at sufficient heat and then store it air tight it should come out pretty low around 20%. If the filament is not dried correctly it will go up while staying stable if the filament is dry.

2 Likes
4

thanks
after a 6hr run at 65c in the heater the petg read 20% humid for the last 2h then using a food vac sealer set on moist i sealed the roll

before use ill run threw again for 8hrs an pop the heater lid a few during as some have suggested to get it below 20% as from some iv heard getting down to 16-14%

5

thanks here my current details
after a 6hr run at 65c in the heater the petg read 20% humid for the last 2h then using a food vac sealer set on moist i sealed the roll

before use ill run threw again for 8hrs an pop the heater lid a few during as some have suggested to get it below 20% as from some iv heard getting down to 16-14%