UV exposure impact on brittleness of SLA 3D parts

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Hello! I’ve never had experience with SLA 3D printing, but I’m looking to try it now for prototyping purposes in the electronics/med-tech industry. I’ve heard that parts can become brittle over time due to UV light exposure. How does prolonged exposure to UV light (sunlight) specifically affect the brittleness and mechanical properties of SLA 3D prints made from ABS-like and PC-like resins? Would love to hear any practical experiences or insights on this. Thank you!

Solved by Nikolaus Mroncz

Hi Stefan,

for prototypes, SLA still is fine. I would say, you can observe an aging and a change in proberties (by  getting brittle) after a couple of month. I don’t see big differences between the standard resins here. To prevent this, you can , for example, spray paint the parts. Also SLS/ MJF combined with vapour smoothing could be an option.

BR

    • S

      Hello! I’ve never had experience with SLA 3D printing, but I’m looking to try it now for prototyping purposes in the electronics/med-tech industry. I’ve heard that parts can become brittle over time due to UV light exposure. How does prolonged exposure to UV light (sunlight) specifically affect the brittleness and mechanical properties of SLA 3D prints made from ABS-like and PC-like resins? Would love to hear any practical experiences or insights on this. Thank you!

      0
    • Xometry Engineer

      Hi Stefan,

      for prototypes, SLA still is fine. I would say, you can observe an aging and a change in proberties (by  getting brittle) after a couple of month. I don’t see big differences between the standard resins here. To prevent this, you can , for example, spray paint the parts. Also SLS/ MJF combined with vapour smoothing could be an option.

      BR

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        Nikolaus Mroncz

        Thank you, Nikolaus!

        I see that Xometry offers “quick clear coating” for Industrial Transparent, ABS-like material for SLA. Could this be an effective finish to mitigate UV light’s impact on the properties of the parts? If yes, can you please share how effective it is?

        • This reply was modified 4 months, 1 week ago by
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          Stefan M.
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    • Xometry Engineer

      Quick Clear Coating is a spray painting with clear spray. It prevents the parts from the SLA typical yellowish and also to get fast brittle. It is very effective!

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        Nikolaus Mroncz

        Thank you!

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UV exposure impact on brittleness of SLA 3D parts
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