As SLS 3D printing is getting more popular, we share our insights, tips, and tricks for you to use.
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What is the refresh rate?
It is the ratio of a minimum amount of fresh powder needed in a mixture of material used in an SLS 3D printer. A lower refresh ratio means better cost-efficiency of the material.rn
How does it work?
The amount of needed fresh powder is automatically calculated by our software and shown on the printer screen after the print job is finished. Just add shown amount of material into the mixing cycle of used material and you can start your next job with refreshed material
Sinterit’s Lisa X has allowed us to reduce lead-times and create better solutions — faster, helping us satisfy our customers. We have looked at other 3D printing methods, and other brands, but ultimately decided on SLS and chose Sinterit for their communication, and open material possibility. Something we couldn’t find in other suppliers of affordable entry level SLS printers.
Getting Lisa X solved a lot of our problems. It has a big enough printing area, so we almost always can print big components in one part. It wouldn’t be possible with competitive SLS 3D printing solutions.
The main reason Somfy reached out for the SLS technology from Sinterit was productivity. Printing many pieces in one batch was a game-changer
When we look at Lisa’s line of printers, or Sinterit at general compared to other companies, the two major things that we liked were the materials, that are open source, so we are not locked into one brand […]. We are able to look around the market and use a material that works best for the part.
With proper storage and refreshment of 20% with each cycle, there is no need to replace the base, unless there are print imperfections or a reduction in the mechanical parameters of the prints.
No, you should not mix the materials.
According to the manual, carry out the cleaning and sealing replacement cycle of both the printer and the cleaning station.
Flexa Performance is a high-strength, flexible TPU powder designed for Selective Laser Sintering (SLS). It’s ideal for parts that require both flexibility and durability, such as gaskets, joint covers, and vibration dampers.
Flexa Performance is specifically optimized for the Sinterit Lisa X printer, ensuring the best results in terms of part quality, speed, and mechanical performance.
Tensile strength: ~8 MPa
Elongation at break: 173–183%
Shore hardness: 88A
These values provide a strong balance between flexibility and toughness — suitable for both static and dynamic parts
No, nitrogen is not required to print with Flexa Performance on Lisa X.
The recommended refresh ratio is 20%, meaning you should add 20% fresh powder to the unsintered material after each print. While the powder is technically 100% reusable, adding fresh powder helps maintain optimal print quality.
Shoe soles and insoles
Flexible protective covers
Functional grippers
Production tools and fixtures
Vibration isolation components
All of these benefit from the material’s excellent tear resistance and resilience to repeated bending.
Density: 1.05–1.11 g/cm³
Water absorption: 0.87–1.66%
These values indicate a dense, durable structure with moderate moisture sensitivity — suitable for most indoor industrial uses.
Melting point: 120–150 °C
Softening point (Vicat A50): 96 °C
These parameters support moderate heat resistance, making Flexa Performance suitable for warm environments but not high-temperature applications.
Color: Light grey
Mean particle size: 70–90 µm
This ensures a clean surface finish and high-quality sintering performance.
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