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Chemical compatibility of 3D-printed resin parts

3D-Printed parts are used in a wide range of applications. In some of these applications the parts are exposed to petrol, cleaning agents or other chemicals. Our engineering team started to investigate the resistance of common chemicals on 3D-printed parts. Compatibility of 3D-printed and post-cured resin parts were tested with several chemicals. The weight of the 3D-printed blocks was measured before the test and after 24 hour immersion in the specific chemical solution.

Results of chemical compatibility

Weight gain of each tested resin after 24 hour immersion can be found below.

Chemical compatibility liqcreate 3D-printed resins
*Materials in orange fields showed cracks or lost pieces during 24 hour soaking of during drying.
** All resins immersed in Sodium Hydroxide had a soft outer surface. Negative values could indicate potential dissolving or degradation of the resin.

How was chemical compatibility tested?

Compatibility of 3D-printed and post-cured resin parts were tested with several chemicals. From five resins, blocks of 20 x 20 x 20 mm were printed, washed in Liqcreate Resin Cleaner and post-cured according to the table below. The weight of the blocks was measured before the test and after 24 hour immersion in the specific chemical solution. The surface of the immersed blocks was wiped dry before weighing.

Wicked engineering CUREbox compatible with Liqcreate resins settings

Compatibility was tested with the following cleaning materials, industrial liquids and household chemicals:

– Tap water
– Salt water (5 w% NaCl)
– Ethanol
– Dipropylene glycol methyl ether
– Dimethyl sulfoxide (DMSO)
– Tripropylene glycol monomethyl ether
– Diesel
– Petrol
– Bleach (5w% NaOCl)
– Methyl Ethyl Keton (MEK)
– Vinegar (8 w%)
– Hydrocholic Acid (0,1 M pH1)
– Sodium Hydroxide (1 M pH14)

What about other resins and chemicals?

The currently tested resins and chemicals are good selection of industrial chemicals and resins available from Liqcreate. If you are interested in other chemicals or compatibility of other Liqcreate resins, send us an e-mail with your question at info@liqcreate.com

Conclusion

The results show that Strong-X and Deep Blue have excellent compatibility with all tested chemicals. If a tougher, chemical resistant resin is required, Clear Impact is advised. Tough-X and Flexible-X are more critical with some chemical solutions and are therefore not advised for prolonged exposure to ethanol, Dipropylene glycol methyl ether, Methyl Ethyl Keton and Sodium Hydroxide.

Before using printed parts for your project, it is important to assess the exact conditions that the parts will be exposed to. Furthermore post-curing is of great importance to get good chemical compatibility.

All that remains is to wish you good luck with your project. If there are any questions, please contact Liqcreate: info@liqcreate.com.

[1] https://wickedengineering.com/

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