Jump to content

PLA fumes while printing


robogrobo

Recommended Posts

Posted · PLA fumes while printing

I don't think they are. But you might want to lower the printing temperature, you get less fumes that way. Printing at 250C gives a lot of fumes, while printing at 220C gives a slight smell after a hour or so.

  • Link to post
    Share on other sites

    Posted · PLA fumes while printing
    Are the fumes from the melting PLA harmful?

    PLA doesn't make much/any fumes, and they are not harmful (AFAIK).

    If you see any fumes, it is most likely water steam. The PLA is hygroscopic, and the water bubbles out during printing, causing all sorts of little surface imperfections. best to keep the PLA in sealed bags with desiccant.

  • Link to post
    Share on other sites

    Posted · PLA fumes while printing
    I don't think they are. But you might want to lower the printing temperature, you get less fumes that way. Printing at 250C gives a lot of fumes, while printing at 220C gives a slight smell after a hour or so.

    I printed PLA at 185 deg, too much high temperation not good for PLA, since PLA is of bad heat stable(why? you can compare PLA with ABS, keep both on high temperation higher than 250 deg for a while, PLA wil flow out from nozzle without motor drive), when temperation up to 250 deg, it mostly go degradable(PLA is a biodegradable corn plastic),something very unknow fume emmit, and you may find the PLA filament melting flow from nozzle "dirty yellow black", I think that nothing good for health.

    different supplier PLA is different process temperation, my do is 185 deg,very safe.

    anyway, I don't like the smell of ABS, make me headache,must be in ventilation environment.

  • Link to post
    Share on other sites

    Posted · PLA fumes while printing

    FYI, from looking at the chemical formula, you can reasonably know what components end up in the fumes when it overheats.

    So PLA has Oxygen, carbon and hydrogen. Most combinations of these molecules are harmless. My chemistry is probably lacking, but I'd say benzene is one of the few dangerous combinations of these. But it's really hard to make that from PLA: The three carbon molecules are spread out, while the three hydrogen molecules are connected to one carbon molecule. That won't easily make benzene.

    ABS on the other hand, starts out with benzene and an N with three bonds to a carbon molecule. This could fall apart into HCN. Very poisenous. And the benzene could come loose from the hydrocarbon "tail". All in all ABS can be said to be dangerous to decompose through heating and PLA is safe.

    (Pla starts out as lactic acid which you find in ... milk)

  • Link to post
    Share on other sites

    Create an account or sign in to comment

    You need to be a member in order to leave a comment

    Create an account

    Sign up for a new account in our community. It's easy!

    Register a new account

    Sign in

    Already have an account? Sign in here.

    Sign In Now
    • Our picks

      • UltiMaker Cura 5.8 beta released
        Another Cura release has arrived and in this 5.8 beta release, the focus is on improving Z seams, as well as completing support for the full Method series of printers by introducing a profile for the UltiMaker Method.
          • Like
        • 1 reply
      • Introducing the UltiMaker Factor 4
        We are happy to announce the next evolution in the UltiMaker 3D printer lineup: the UltiMaker Factor 4 industrial-grade 3D printer, designed to take manufacturing to new levels of efficiency and reliability. Factor 4 is an end-to-end 3D printing solution for light industrial applications
          • Thanks
          • Like
        • 3 replies
    ×
    ×
    • Create New...