MPU 100
MPU 100 is Carbon’s first medical-grade material, designed to help medical product manufacturers accelerate product development cycles and improve the quality of their products. The material offers a unique combination of biocompatibility, sterilizability, and durability, in addition to engineering-grade mechanical properties, abrasion resistance, and chemical resistance. MPU 100 is comparable to medical-grade ABS.
MPU 100 is a medical-grade material. To use in medical applications, users must sign a Medical Sales Agreement.
- ISO 10993-5, ISO 10993-10, and USP VI biocompatibilty; suitable for:
- Skin contact applications
- Externally communicating devices with <24 hr contact for tissue / bone / dentin
- Drug contact applications
- Compatible with multiple sterilization methods and passes cytotox post-sterilization
- FDA Master File available online
- Reference the technical datasheet (TDS) for Biocompatibility, Sterilization, and Disinfectant Compatibility
About the Material Material overview and uses cases
Technical Data Sheet Mechanical properties and data
Safety Data Sheet Login required
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- MPU 100 is less susceptible to differential shrinkage across varying wall thicknesses.
- MPU 100 is more susceptible to optical effects.
MPU 100 is more susceptible to the optical effects overcure and cure-thru due to its light color.
The printer's software does automatically account for these effects in MPU 100 with a general use compensation factor.
Under tight tolerance conditions and small feature sizes, additional compensation to those features may be desired.
- Use the suggested compensations as a starting place to adjust feature size.
- Cure-thru: oversize in the Z axis by 0.08 mm
- Overcure: oversize by 0.04 mm
- Users should be prepared to iterate for tight tolerances.
MPU 100 is more susceptible to shift lines for tall thin parts.
The tendency for shift lines in MPU 100 is driven by heat during printing. As the parts become hotter during printing, they lose green state stability and can move under the forces of printing, resulting in shift lines.
Solutions
- Increase spacing between parts on the platform.
- Increased spacing between parts reduces the overall heat generated during printing.
- 10-20 mm spacing (padding) recommended for MPU 100.
- Increased from 5 mm standard padding.
- Add supports to provide the parts more stability.
Standard Spacing - 5 mm
Proper Spacing for MPU 100 - 20 mm
MPU 100 is susceptible to smokiness.
The following is recommended:
- Follow burn off procedures closely.
- Optionally, stir dispensed resin with a spatula.
- Recommended when using 2 or more cartridges to fill a cassette.
- Wash in dedicated solvent & washtub to prevent discoloration from darker resins.
- Wash in dedicated solvent, or solvent used only with two-part resins. Sharing solvent with one-part resins can impact biocompatibility. (For both part washer and manual washing.)
MPU 100's white color is particularly susceptible to discoloration due to cross-contamination with other resins.
The following is recommended:
- Dedicated solvent & washtub
- Dedicated Part Washer
- Separate post-processing tools (scraper, tongs, etc).
MPU 100 parts have exceptional scratch resistance in their final state but scratch easily in the green state, so extra care is needed in handling until fully cured.
- Washing on platform is recommended.
- Parts washed loose in a washtub will scratch each other.
- When washing parts off platform is preferred, wash parts individually to avoid scratching.
- Tips in platform removal:
- Remove parts one at a time.
- Avoid letting parts fall onto other parts.
- Swabs may apply minor abrasion if used for touch-up. Apply a light touch and/or swab the whole surface for consistency.
- Apply a texture to the parts.
This photo has been adjusted to make the pattern more visible.
Scratches
Scratches from parts bumping into each other appear thicker and less dense than the swab pattern.
Abrasions
Scratches from swabs appear as minor abrasion as if the surface has been buffed.
MPU 100 is thermally cured (baked) at a lower temperature than other resins due to the sensitivity of oxidation causing white parts to turn yellow.
Ensure that the correct bake schedule is used to avoid yellow parts:
- 4 hours at 100° C
MPU 100 parts may pick up defects from baking implements when parts or baking supplies are not fully clean.
- Due to the white color, areas of uncleaned resin may be more difficult to see.
- When parts are not fully clean, they are more prone to picking up marks from baking implements. (top image)
- The white color will also pick up marks from baking implements that are dirty or have resin baked in. (bottom image)
Mitigations
- Ensure that baking surfaces are clean and free of baked on resin.
- Smooth out non-stick foil when using as a baking surface.
- Pan mesh may leave small marks on the part if either the part or the mesh is dirty. Ensure both are clean when warp mitigation is needed.
- Hanging parts can be an effective strategy for MPU 100.
MPU 100 is compatible with salt baking when appropriate for the geometry.
- Due to the white color, areas of uncleaned resin may be more difficult to see.
- Take extra care to clean parts thoroughly before packing in salt to avoid baked-in salt.
