ember tartan
Is PLA carbon more likely to absorb moisture without dry box? Polylite pla absorbs up to 0.55% moisture and PLA carbon 0.37 % so I would say no, but for PA materials on the contrary carbon fibers make things worse.
Also, it could be that PLA carbon absorbs less but it's more affected by it...
The question is general and not strictly limited to Polymaker brand.
stuck masonBOT
To prevent moisture absorption, it's best to store all filaments in a dry and cool place, ideally in an airtight plastic container or a dry box. If the filament absorbs moisture, it can cause printing issues such as popping or hissing sounds, inconsistent extrusion, or clogged nozzle. Therefore, it's important to dry the filament before printing if it has been exposed to moisture.
In summary, PLA carbon filament is less likely to absorb moisture than standard PLA filaments due to the carbon fiber content, but it's still important to store and handle it properly to maintain its quality.```
wind osprey
For the nylon are you comparing CoPA with PolyMide PA6-CF?
CoPA is a copolymer if PA6 and PA6,6. My understanding is that the PA6,6 is slightly less hygroscopic, so the blend is overall less hygroscopic than a pure PA6. So CoPA is not directly comparable to the base material of PA6-CF or the other Polymaker CF nylons.
ember tartan
I was asking only an pla, the reference to nylons was generic because I only remember that it was mentioned that nylons with CF are more difficult to dry because of the different moisture absorption and retention.
I'm out of dry (super dry, <5% RH) boxes and I got two 500g spools of PLA-CF. PLA can stay at room humidity usually, but maybe I will have to keep the CF in sealed packages, at least.
I also got a 500g PLA-ALU spool but I guess that won't suffer from humidity much
hybrid lion
wait but arent carbon fibers porous?
wind osprey
but would that impact moisture? From what I can see, I don't know if carbon fibres actually absorb moisture
Everything about drying carbon fiber or moisture absorption I can find is in reference to an epoxy and how that dries or absorbs moisture.
hybrid lion
but would that impact moisture? From what I can see, I don't know if carbon fibr...
it coudl allow for more surface area for moisture absorption. Now the inside of the filaments more affected because of the cf? idk this is my speculation
wind osprey
but we are talking about percent of water absorption
porous or not won't effect at what percentage of moisture a part can possibly hold, it would effect how fast it absorbs it but I don't think that's the question?
The 8% CF means per weight there is less plastic. So I think thats why the PLA-CF absorbs less moisture than the regular PLA. The carbon component takes up volume and weight, and the carbon doesn't absorb the moisture.
On the contrary, CoPA absorbs less than the Carbon Fiber because the 6,6 component of CoPA is less hygroscopic whereas the PA6-CF is using just PA6, it's not a copolymer like CoPA.
I'd say filament with mositure adsorption (film on the surface) would be higher with porous filament due to surface area, but filament moisture absorption shouldn't change based on porosity.
hybrid lion
but we are talking about percent of water absorption
ohhh. yeah i was thinking rate of absorption