New Advancement for SLA/DLP/CLIP Resin Removal: Meet our Latest Chemistry Formulation

Lattice 3 Black 3D printed Resin parts. Today we’re proud to launch our latest innovation for 3D-printed Vat Photopolymerization resin removal, PLM-403-SUB. This new addition to the PostProcess Technologies family of proprietary detergents was developed specifically for PostProcess’s patented Submersed Vortex Cavitation (SVC) technology and improves upon the performance of its predecessor, the previously released PLM-402-SUB (referred to 402 from here on).

Read on to learn how PostProcess’s newly developed resin removal detergent stacks up against common resin removal solutions like isopropyl alcohol (IPA), dipropylene glycol methyl ether (DPM), or tripropylene glycol methyl ether (TPM).

Beyond a detergent’s ability to clean parts, perhaps the number one thing that users look at is the life of the detergent, as this typically determines the frequency of laborious cleaning activities. In the case of resin removal solutions, longevity can be defined by the weight that the chemical solution can hold while it is still able to functionally remove resin. As a result of testing capacity by weight of resin in solution at 10 minutes, 403 not only had better longevity than all typical solvents (IPA, TPM, DPM), but it also had a 6% improved longevity versus our previous solution, 402.

In addition to scaling back downtime caused by chemical change-outs, the optimized longevity of 403 can play a role in reducing waste generation, as well. Uncured resins in solution are considered hazardous, making them costly to dispose of. The less frequency with which this hazardous waste must be disposed of, the better – and that’s precisely the benefit of 403’s longevity. Once saturated with resin, 403 can even be recovered for use by distillation. Under a typical vacuum distillation, up to 90%+ of 403 by saturation weight (amount of resin in solution) can be recovered for reuse of the detergent. This factor serves to make 403 an especially sustainable and cost-effective option.

To enable users with a simple way of tracking their detergent’s longevity, PostProcess provides a Hydrometer solution to indicate the amount of resin saturation.

Safety Considerations
In addition to handling hazardous materials as minimally as possible, additive operations make an effort to mitigate inhalation and combustion risks in order to maintain a safe work environment. With a higher flashpoint and boiling point than 402 or IPA, 403 is a critical asset in reducing the risk of flammability and maintaining safety for engineers and technicians. In fact, this heightened flashpoint brought 403 down to the “non-flammable liquid” category.

Additionally, with a vapor pressure of only .2 @ 20 C (mm Hg) compared to IPA’s 33.1 @ 20 C (mm Hg), the 403 detergent is far less volatile to work around. Offering a safer work environment, this game-changing detergent is developed to be user-friendly with a minimal waste output.

Alleviating Storage Concerns
If you’re working in the additive space, you’re likely already familiar with the limitations on the amount of flammable/combustible resin removal liquids that can be kept on-site. While maintaining safety is essential, these regulations can prove troublesome for large-scale resin removal.

In situations where large volumes of chemicals are required to remove resin, 403’s heightened flashpoint addresses issues of storage limitations. The 220°F (104°C) can be stored for use in much larger quantities than other resin removal chemistries that are considered flammable or combustible.

Chemistry is just one part of our comprehensive approach to resin removal. You can learn more about the various components of our full-stack resin removal solutions, as well as see in-depth data on 403’s performance in our latest Application Note.

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