SoliForum - 3D Printing Community — High humidity during extrusion?

Re: High humidity during extrusion?

null@example.com (Superdave) — Thu, 06 Nov 2014 01:16:18 +0000

A lid on the hopper would be helpful also

Re: High humidity during extrusion?

null@example.com (elmoret) — Wed, 05 Nov 2014 22:28:17 +0000

65% humidity is not significant. I have extruded in 90% or higher humidity.

If you are concerned, keep the raw material dry and sealed, then add it a few hundred grams at a time (a few hours worth) to the hopper - that way it has less time to be exposed to moisture for extrusion.

Re: High humidity during extrusion?

null@example.com (n2ri) — Wed, 05 Nov 2014 22:19:56 +0000

buy a dehumidifier for room being worked in

High humidity during extrusion?

null@example.com (FelixP) — Wed, 05 Nov 2014 20:41:00 +0000

So I'm getting close to getting my new printer up and running, which means it is almost time for me to buy my own filastruder.

I plan on getting a food dehydrator to pre-dry pellets before trying to extrude anything. However, my local humidity is 65% !
If it takes several hours to extrude a batch of pellets, then doesn't that put them at risk of absorbing water from the air while extruding? Do I need to take extra steps to make the pellets safe from the humidity?

I know for PLA/ABS this probably isn't a major issue, but I am planning on trying to extrude Polycarbonate and Nylon, which are both more hydrophilic.