EPU 41
Highly elastic, tear resistant, and energy returning
EPU 41 is a production-scale elastomeric material that is especially well-suited for lattices where high resiliency is needed. EPU 41 has higher resilience (energy return) and better retention of elastomeric properties at temperatures > -10°C. It is comparable to commercial TPUs with a Shore A hardness of 70.
About the Material Material overview and uses cases
Technical Data Sheet Mechanical properties and data
Safety Data Sheet Login required
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EPU 41 Part A resin may crystallize at lower temperatures. During shipping, resin containers may have been kept at low temperatures, so all Part A containers should be incubated upon receipt.
Follow the incubation method appropriate for the container size.
Without the incubation step, EPU 41 will be too viscous for mixing.
For containers that fit inside a standard thermal curing oven: 5 L and 20 L bottles.
- Incubate Part A component:
- Place one or more containers directly into oven or incubator.
- Space containers apart, in upright orientation.
- Set the time and temperature for 24 hrs (or up to 7 days) at 40°C (104°F).
- Run oven or incubator to melt crystals.
- Carefully remove bottles from oven.
- Store cartridges at recommended temperature to prevent recrystallization.
The same oven used for thermal curing can be used to incubate cartridges. Instead of an oven, you can utilize a dedicated incubator for this purpose. Reference Accessories & Supplies.
For 180 L drum and 1000 L tote size containers.
Reference this downloadable PDF for full instructions using a 1000 L tote container. 180 L drum containers follow a similar method, swapping in drum accessories where appropriate.
Notes
- Allow for 48 hours incubation time
- Additional drum or tote accessories are needed to facilitate incubation. Ensure that your facility is equipped to handle large industrial containers.
Thermal blankets can be purchased for drum and tote size containers. Reference Accessories & Supplies.
EPU 41 Part B can form salt crystals when left open in contact with air, or when liquid material is left around the mouth of the container. Avoid formation of salt crystals on rim of Part B container with simple lab practices.
- Wipe mouth of container to clean off any resin prior to closing cap.
- Keep container closed when not in use. Part B loaded in an MMD counts as a closed container.
EPU 41 is only available in bulk packaging for use with a Meter, Mix, Dispense (MMD) system or other Bulk Mixing strategy.
Set up for PAR3CM MMD
- Follow PAR3CM instructions for filling
- 180 L and 1000 L containers: Contact Meter Mix (PAR3CM manufacturer) for special considerations when working with industrial size containers
- Follow protocol information for: Ratio, Pressure, Mixing Tip, Burn off
- Heat settings
- Part A - 25°C
- Part B - no heat
