Brainstorming a possible injector for NFC implants, and maybe other implants as well



  • @ChrisBot Not a problem ;) I'll order some HT and put in my autoclave soon, i guess the standard 2.1bar 137c would work? Or what would you suggest as autoclavesettings?
  • edited August 2016
    I have plenty of ABS to print with, just send me STL files and I can get that going.

  • @Areis. That's the next piece of the puzzle... Did we ever actually decide on a tool? I am not sure how well a flat injector would work on something so flexible. I'm personally more in favor of the spatual, but I am a tad biased.

    @NLmax, you should pick a model with relatively complex geometery to print, so it's easier to spot any apparent deformities.
  • @ChrisBot I'll look around for a model unless there is already an prototype STL?

    On the topic of costs, don't forget that a printer uses quite alot of power. I normally calculate around 30$cents an hour, but with maintenance it could be a bit more
  • I'll see if I still have the file for the prototype spatula thing I made a while back, and will link when I get home. If not then I trust you can use your judgement when picking a model.

    And if I may ask, why do you bring up cost?
  • I saw that price was discussed a while Back haha and wanted to share my Experience as printing for others . As i did it to make some money, haha. I noticed my electricity Bill flew up during that Time. :) Not trying to make money of you
  • edited August 2016
    @ChrisBot , Got a test sample of filament in the mail this morning. I
    went for PETG ( it has a print temp of 230-250c), instead of the
    colorfabb one you suggested as it was cheaper. I will try that one when i get my paycheck again :).

    I'll try to print the injector you posted in the other topic today or maybe tomorrow when I get the time and autoclave it.


    I've tried the PTEG and it printed fine, only after autoclaving i noticed that the heat did melt the injector.

    PTEG is not suitable although it has a melttemp of 230c

  • @NLmax, darn! That's unfortunate. If that one melted then I feel like the other filament won't do too much better.

    I'm still curious about resin prints, but at that point it would be easier just to buy a real injector...
  • @NLmax did it actually melt at that temperature or did it just soften to a point were it then collapsed under its own weight. because if that is the case then you might be able to come up with a design that would have more strength under those circumstances or come up with something to support it whilst in the autoclave.
  • @Umutof , well it did both. I'll upload pictures soon. But the plunger"Stick" melted and bent. but the holder melted and collapsed.

    I just saw that the glasstemp of the material is 97c, My idea now is that it needs to be 140+c as autoclaves go up to 137c ish.

  • @ChrisBot Maybe that ABS will work? it has a glasstemp of 105±C? But i haven't really printed with ABS well since ever. So I'm not sure if that will work.

    @Aeris I think Z-ABS will work although i can't print it neither do i have any of it in stock, so perhaps finding someone who can print and autoclave it? Or find someone who can print and send it and i'll autoclave it

  • perhaps it would be better to print a mold for it and then fill it with a material that is more suitable for sterilization?
  • edited August 2016
    @rolal, that's actually what I was thinking, but again, at that point it would make more since just to buy an actual injector. 
  • edited August 2016
    @ChrisBot currently someone is printing one for me in Z-ABS and I spoke to him and if this didn't do it he had another filament "Z_ULTRAT " which has a glasstemp of 144C.

    Currently I'm waiting for it to be delivered to me to test the Z-ABS, I'll post results when I get it.

    If that doesn't do it I'll order a new one in Z_ULTRAT and post those results if needed


    The Z-ABS arrived today and went directly to the autoclave, too bad it got bent by the temperature as I was expecting . I'll order a Z_ULTRAT model if anyone is interested in those results?
  • edited August 2016
    I would be, thanks!!
  • @JohnDoe the order has been placed so I will probably have results about the Z_ULTRAT filament this weekend
  • Also it there a tolerance for what's acceptable as far as warpage?
  • Well All previous filaments wrapped and melted so its just a Matter of trial
  • Okay that makes sense....
  • I'll be away for a week, but i'll test the Z_Ultrat when i get back. That'll be next monday for anyone interested
  • Back Home from my Holiday and this is the zultraT after the autoclave.
  • So it worked perfectly!! Why are you autoclaing them and not just chemically cleaning them like we do with magnets?
  • No even the z ultrat bent alot by autoclaving, well because i Have an autoclave at Home and i prefer to use it instead of chemicals haha.
  • edited August 2016
    Okay? Is there any benefit to the autoclave? And doesn't the chlorohexadine evaporate in seconds?
  • I think the possitive thing when using an autoclave is that you don't have to worry about chemical reactions between the filament and the cleanchemicals.

    I'm not sure if chloroheadine is enough to get it fully sterrile?

  • Fair enough, not saying not to clean it but how clean does it truly need to be? Also what about a ultrasonic autoclave?
  • @JohnDoe, I'm kind of with you on this one. I sterilized my 3d printed injector with a chlorohexidine soak and everything seems to have turned out peachy
  • Yeah did you mix it with rubbing alcohol?
  • Uhh, no?? Was i supposed to???
  • Isopropyl and Chlorhexidine can both be mixed to cover a broader range of antibacterial effectiveness. 

    From my understanding, the Chlorhexidine is more potent and effective, but takes a longer time frame to work. Isopropyl tends to be very fast acting and aggressive, but doesn't hit as many things. On people, the Iso also burns. >~<

    70% isopropyl and 4% Chlorhexidine is i think the golden mix... I think... :D
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