Polypropylene (PP)

Polypropylene material with good mechanical properties. Dedicated for prototyping of PP parts, as well as functional parts utilizing chemical resistance, weldability and ductility

Properties:

  • great chemical resistance
  • low density enabling buoyancy
  • recyclability
  • suitable for pneumatics
  • weldability with other PP parts

Applications:

  • automotive industry (reservoirs, piping, housings)
  • plastic parts producers (integrate with injection molded PP)
  • laboratories (custom chemical tools,i.e holders or vessels)
  • quality, low volume production of low stress parts
  • general prototyping of PP parts

Reusing the powder in a simple and cost-efficient way.

What is 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.

How it works

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

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Performance materials for special applications – learn more about PA12 Industrial, PA11 CF & Flexa Performance

Sample print prices

Material
Printer
Material
Printer
Model
Full bed
Printing Costs

Order sample model

printed with Polypropylene Powder

Specification

General properties
Material type
PP co-polymer
Dedicated for
Lisa PRO, Lisa X
Software
Sinterit Studio Advanced
Material refreshing ratio¹
50%
Nitrogen needed
No
Colour
Grey
Mechanical properties
Tensile Strength
19,3 MPa
PN-EN ISO 527-1:2012
Tensile modulus (Young)
824 MPa
PN-EN ISO 527-1:2012
Flexural Strength
25.6 MPa
PN-EN ISO 178:2011
Impact strength (Charpy – unnotched)
30 kJ/m2
PN-EN ISO 179-1:2010
Thermal properties
Melting point
135 °C
PN-EN ISO 11357
Heat deflection temperature at 1.8 MPa / 0.45 MPa
50 / 85 °C
PN-EN ISO 75-2:2013-06
1 Refresh ratio is the amount of refreshing powder that is required to be mixed after the printing with unsintered material.

Information provided within this document shows values for reference and comparison only. Parameters presented in this specification are subject to change without notice. Final part properties may vary based on a printed part design and orientation, material handling as well as printing environment (humidity and temperature). The manufacturer is responsible for validation whether the printout is accurate and fit for the intended purpose.

Compatibile with:

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We are determined to help you!

Let experienced experts and engineers help you make the decision

































Daniel Aarts
Technical Director at Innoseal Europe

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.

Innoseal case study with Sinterit LISA X
Alberto Parolin
R&D Team Leader in BNP

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.

LISA X in action case study BNP
Philippe Bendel
Additive Manufacturing Development Leader – Somfy

The main reason Somfy reached out for the SLS technology from Sinterit was productivity. Printing many pieces in one batch was a game-changer

Alec Bialek
Head of Jetson’s R&D

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.

Discover Case Studies

See also powders:

Polypropylene (PP)
PA12 Onyx
PA11 ESD

FAQ

How should I store the printing powder?

How should I store the printing powder?
  • Store the powder at room conditions ( ~23°C and 50% humidity – the lower humidity the better)
  • Always store the material in a sealed dry box/container.
  • Do not leave the container open.
  • Clean the machine directly after printing and store the material immediately after removing the print cake.
  • Do not let the powder stay in the printer for more than a couple hours.
  • Put a few silicone absorbers in the container (but don’t add them to the printer)

Contact Sinterit support with your questions.

What is the difference between “Fresh” powder and “Starter powder”?

Starter powder is basically a print-ready powder.
In Sinterit we distinguish three powder conditions: print-readyused, and fresh.

Used is a type of powder that you get after the printing, present in overflow bin or remaining after printout cleaning.
Fresh is a type of powder that is being used for refreshing the powder. After mixing this powder with used powder you will receive print-ready.
Print-ready is a type of powder that you can simply pour into the printer and start printing.
Although printing using Fresh is possible it’s not economically optimal therefore Sinterit printers are optimized for using a refreshed (print-ready) powder.

Why do I need an ATEX vacuum cleaner to clean powder?

SLS polyamide powder used for 3D printing is considered particulate matter because of its size. Polyamide powder particles are generally 40 micrometers or smaller. If vacuumed in an ordinary vacuum cleaner, the powder could cause an explosion.

Such materials are subject to labor regulations on air quality and occupational safety. The procedures call for appropriate maintenance of powder at work. Only certified industrial vacuum cleaners should be used to clean such materials. More information about the ATEX Vacuum cleaner can be found here.

Contact Sinterit support with your questions.

Is Polypropylene a “special tasks” material?

It can certainly be said so. PP exhibits excellent chemical resistance, which is why polypropylene components are often found in chemical and pharmaceutical laboratories. Due to its low density, it is a buoyant material, and after use, it can be recycled.

What is Polypropylene (PP) powder used for?

It’s designed for prototyping and low-volume production of PP parts, especially in applications that require chemical resistance, buoyancy, and weldability—such as automotive components, custom lab tools, or pneumatic systems.

What printers are compatible with PP powder?

This material is compatible with Sinterit Lisa X and Lisa Pro 3D printers.

Does this material require a nitrogen atmosphere?

No, printing with PP powder does not require nitrogen.

What makes PP powder unique among Sinterit materials?

It combines excellent chemical resistance, low density (for buoyancy), weldability with other PP parts, and recyclability—making it ideal for both prototyping and functional use.

Is PP powder chemically resistant?

Yes, it shows great chemical resistance. Detailed resistance data for specific media is available on request.

What is the refresh ratio for PP powder?

The refresh ratio is 50%, meaning half of the powder in each new print job should be fresh.

Is PP powder suitable for parts exposed to impact?

Yes, it has good impact resistance with a Charpy unnotched strength of 30 kJ/m².

Resources

Polypropylene
Check the full specification
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Polypropylene
Safety data sheet EN
DOWNLOAD
Polypropylene
Safety data sheet DE
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Polypropylene
Safety data sheet FR
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Polypropylene
Safety data sheet PL
DOWNLOAD

Pricing

Below there are approximate costs for some example models.
Be aware that the quotation assumes that there is only one piece printed. In SLS technology, the cost per part will be much lower with a higher number of elements printed at once.
  • Flexible
  • Standard
Model
Dimensions
PA12
Smooth
PA11
Onyx
Flexa
Grey
Flexa
Soft
TPE
Below
Model volume:
Model volume:
Total print height:
6.82 cm
Dimensions:
65 x 65 x 63 mm
51,30 €
51,30 €
51,30 €
51,30 €
51,30 €
51,30 €
Crank
Model volume:
28.12 cm^3
Total print height:
6.82 cm
Dimensions:
65 x 65 x 63 mm
49,90 €
49,90 €
49,90 €
49,90 €
49,90 €
49,90 €
Derailleur
Model volume:
28.12 cm^3
Total print height:
6.82 cm
Dimensions:
65 x 65 x 63 mm
71,80 €
71,80 €
71,80 €
71,80 €
71,80 €
71,80 €
Driller housing
Model volume:
28.12 cm^3
Total print height:
6.82 cm
Dimensions:
65 x 65 x 63 mm
157 €
157 €
157 €
157 €
157 €
157 €
Model
Dimensions
PA12
Smooth
PA11
Onyx
Flexa
Grey
Flexa
Soft
TPE
Crank
Model volume:
28.12 cm^3
Model volume:
28.12 cm^3
Model volume:
28.12 cm^3
51,30 €
51,30 €
51,30 €
51,30 €
51,30 €
Crank
Model volume:
28.12 cm^3
Model volume:
28.12 cm^3
Model volume:
28.12 cm^3
51,30 €
51,30 €
51,30 €
51,30 €
51,30 €
51,30 €
Crank
Model volume:
28.12 cm^3
Model volume:
28.12 cm^3
Model volume:
28.12 cm^3
51,30 €
51,30 €
51,30 €
51,30 €
51,30 €
51,30 €
Crank
Model volume:
28.12 cm^3
Model volume:
28.12 cm^3
Model volume:
28.12 cm^3
51,30 €
51,30 €
51,30 €
51,30 €
51,30 €
51,30 €
Crank
Model volume:
28.12 cm^3
Model volume:
28.12 cm^3
Model volume:
28.12 cm^3
51,30 €
51,30 €
51,30 €
51,30 €
51,30 €
51,30 €
Crank
Model volume:
28.12 cm^3
Model volume:
28.12 cm^3
Model volume:
28.12 cm^3
51,30 €
51,30 €
51,30 €
51,30 €
51,30 €
51,30 €

Get a free sample box

Universal joint + turbine
The free samplebox contains two printouts made from PA12 Smooth. They are both movable designs, and each one is printed in one piece.

These are examples showing high precision and freedom of design ensured by SLS technology.
order free sample box
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SEE ADVANCED samples
This product includes GeoLite2 data created by MaxMind, available from https://www.maxmind.com.