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#Post#: 6--------------------------------------------------
Robust print materials that can be sterilised
DIR By: DanH
Date: February 26, 2018, 5:58 am
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I often make ancillary bits of equipment for culturing cells but
the main parts generally have to be machined out of something
tough enough (poly carbonate/ polysulphone£££) to be sterilised
in some fashion - typically in an autoclave (121 C steam) or
gamma sterilised at a push, I was just wondering if anyone has
used any of the "tough" resins that are available (such as
Formlabs high temp / tough resin) and does it still print at a
high enough resolution?
#Post#: 8--------------------------------------------------
Re: Robust print materials that can be sterilised
DIR By: jerrynayler
Date: March 2, 2018, 5:35 am
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This would definitely be worth trying with the Formlabs dental
resin. I'm currently away but do get in touch with Geoff in CUH
Media Studio, or Danny Marsden in Clinical Engineering.
#Post#: 9--------------------------------------------------
Re: Robust print materials that can be sterilised
DIR By: jerrynayler
Date: March 3, 2018, 4:44 am
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I think there are two possibilities. From the Formlabs website:
"Formlabs High Temp Resin has a heat deflection temperature
(HDT) of 289 °C @ 0.45 MPa—the highest on the 3D printing
materials market. Use it to print models for environmental
testing, or create molds and masters for production processes
like casting and thermoforming."
Their Dental SG Resin is: "An autoclavable, Class 1
biocompatible resin, Dental SG is designed for printing precise
surgical guides and similar devices."
I would try the Dental SG first - we could try a small sample
for you.
#Post#: 11--------------------------------------------------
Re: Robust print materials that can be sterilised
DIR By: DanH
Date: March 7, 2018, 11:12 am
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Thanks Jerry :)
#Post#: 13--------------------------------------------------
Re: Robust print materials that can be sterilised
DIR By: Dan_CEI
Date: March 12, 2018, 4:54 am
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Hi Dan from engineering here,
Are the units you have made for you or purchased from a supplier
for the job?
From the resin and 3d printing side of it, the dental resin is
designed to be sterilised in an autoclave but I have never tried
multiple cycles and don't think it would last long under those
conditions. Also the resins can be brittle and easily shatter.
That is what the tough resin tries to overcome, though I haven't
tried autoclaving it I don't think it would be up to the job.
The high temp might work (we don't have any to hand) though
again they all come with drawbacks, id have to have a look at
the datasheet for high temp resin.
Ideally, you would use the dental resin to prototype shape and
form. Then find an alternative manufacturer to make them out of
traditional plastics, either by machining, injection moulding or
another method.
Ill bring along a sample print we have of the dental resin to
the meeting tomorrow so we can have a chat.
Best wishes
Danny
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