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As far as I understand, a polymer absorb some moisture and amount of (maximum) moisture that can be absorbed depends on its type (PLA ~1%, ABS? ~10%). Both simple commercial filament dryers and drying ovens operate with heat, keeping the filaments in a slightly less than glass transition temperature environment to eliminate absorbed moisture (not sure if it is possible to eliminate all without a vacuum). Is the heat only way for drying or would keeping the environment dry (<10%) (at room temperature) also cause for material to lose some moisture?

Not sure if I am saying this in correct words; is the heat provided to overcome activation energy (of evaporation, desorption)? Does the activation energy depend on other factors like the RH% of the environment?

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  • $\begingroup$ Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking. $\endgroup$
    – Community Bot
    Commented May 31 at 4:47
  • $\begingroup$ Not sure how to clarify the questions $\endgroup$
    – mete
    Commented May 31 at 5:40

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