Resin Removal from 3D Printed Parts

 

Resins used in the 3D printing process may include urethanes, epoxies and silicones.

 

Solvents are then used to remove excess resins stuck in gaps or cavities on these finished parts.

 

One of the primary cleaning solvents used is isopropyl alcohol (IPA). IPA works effectively. It is a fast evaporating, highly volatile and flammable solvent, presenting serious workplace safety and compliance concerns.

 

Additionally, IPA is expensive and not easy to recycle due to its nature as a volatile solvent.

 

Due to these concerns, Gencast Design began looking for a cleaning solvent other than IPA with a safer physical properties and possible lower operating cost.

 

Our recommendation:-

 

A safer, low-VOC solvent called tripropylene glycol monomethyl ether (TPM). TPM is primarily used in many coating and cleaning applications as a low vapour pressure, low toxicity and water-soluble solvent solution.

 

This solvent is a much safer alternative to IPA during this post post processing process of cleaning 3D printing parts.

 

TPM is also widely used as a cleaner and stripper in enclosed settings, as well as in agricultural, electronic, ink, textile and adhesive products.

 

Environmental, Health and Safety

TPM Solvent (and all propylene glycol ethers) are not included under the category “glycol ethers” as defined in the Clean Air Act Amendments of 1990. Glycol Ether TPM is not subject to reporting requirements under CERCLA, or those established under SARA Title 111 and Section 313.

 

Because of its low vapor pressure (<0.1 @25ºC (mm Hg)) and higher boiling point, tripropylene glycol methyl ether may be considered exempt as an LVP-VOC from applicable consumer products air quality regulations.

 

The Consumer Specialty Products Association (CSPA) also identifies TPM (CAS 25498-49-1) as an LVP-VOC.

 

Our existing customers use TPM to clean the excess resin from parts prior to UV curing. This is often done using a solvent immersion bath or our ProtoRinse System.

 

Learn More

If you would like to learn more about this material, including product specs, application and formulation possibilities, and pricing, or would like to test a sample for your application, please feel free to contact us.