Jump to content
Ultimaker Community of 3D Printing Experts

Recommended Posts

Posted · Food Safe Materials

Hi All,

 

Can anybody point me in the right direction to learn if any of the materials that the UltimakerS5 can use are food safe? When I say food safe, I also need them to be dishwasher safe. It needs to be able to maintain its food safe capability for the lifetime of the products. ABS seems to have these capabilities but can't find any information that specifically states this.

 

Best,

  • Link to post
    Share on other sites
    Posted · Food Safe Materials

    There are lots of food safe filaments.  But there is a more serious issue.  3d printing creates tiny layer lines where bacteria can survive a brief washing.  And worse, there's usually at least one tiny hole into the interior of the printed part where water can get in and stay for weeks to allow bacteria to grow.

     

    Most food safe filaments come with the caveat that the material should touch food only once and then be discarded (never cleaned and reused).

     

    If you are okay with this caveat, and if no one answers your question directly, let us know and I'll call in someone to the conversation who knows about this subject better than me.

     

    As far as dishwashers - PLA slumps/softens around 52C and dishwashers often have a sanitizing feature where they heat the water to something like 55C.  Plus near the heater it can get to 95C.  So pick a material that can handle being heated to 90C.  Like ABS but ABS smells horribly so I recommend something else.  Maybe CPE+.  Nylon is okay but doesn't do great if submerged for days (it gets more rubbery but recovers when it dries out).  Also Nylon doesn't look as good usually and is a bit harder to print.

     

    Most filament types (e.g. ABS or CPE+) have versions that are NOT food safe because of additives and also have versions that ARE food safe.

    • Thanks 1
    Link to post
    Share on other sites
    Posted · Food Safe Materials

    I was afraid that might be the case. If I can't get a filament material to be dishwasher safe, food safe, and lacks strange odors, then what about a post-print coating? Something I could dip the printed product into that can prevent the problems that the tiny layers and holes cause. It would also need to prevent the odor problem cause by the ABS (leaning towards ABS at the moment).

     

    Nylon sounds feasible if I can figure out a way to make it look good. Which Nylon filament would be best given the previous constraints?

  • Link to post
    Share on other sites
    Posted · Food Safe Materials

    I don't recommend FFF.  Maybe a resin printer like the form 2 can do this?  I asked some colleagues to pipe in here but they seem to have chosen to say nothing. 😞

     

  • Link to post
    Share on other sites
    Posted · Food Safe Materials

    Ah, okay. Thanks for the info! I wish they would reply lol. I think I am set on an Ultimaker 5S because of its versatility and production capability.

  • Link to post
    Share on other sites
    Posted · Food Safe Materials

    What about printing a mould, and then carefully sanding and polishing that mould, and casting your model in a food safe plastic? Then you still have the freedom of designing and 3D-printing, but you don't have the tiny holes in the final models. Use a low-exotherm, slow curing product, so the prints do not melt. And depending on the product, use a good mould release spray or coating so it does not permanently get glued into the mould.

     

  • 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
    ×
    ×
    • Create New...