Focus on materials: the Kimya PEKK-SC filament

Once we have developed a new material, we usually take the time to present it to you. And on this occasion we are talking about the Kimya PEKK-SC ou p(polyetherketoneke semi-crystalline), a thermoplastic offering excellent mechanical properties and good levels of resistance against temperature and chemicals. Our new filament is therefore a member of the polyaryletherketone (PAEK) family, polymers known for their high level of heat resistance and also for their rigidity. They are frequently compared to certain metals, offering similar mechanical properties at lower weight. For example, they are 40% lighter than steel. .  

This new filament is therefore joining our range of Ultra filaments which already includes the Kimya PEKK Carbon et du Kimya PEKK-A. The Kimya PEKK-Carbon stands out through the addition of carbon fibers to its formulation. The two filaments Kimya PEKK-A and Kimya PEKK-SC are made from virgin resins based on KEPSTAN by Arkema. So what are the differences?

The repeat unit of PEKK is as follows:

When synthesizing PEKK, the TERE/ISO ratio can be adjusted to obtain PEKK with different properties!

The properties of the Kimya PEKK-SC

The Kimya PEKK-SC crystallizes more quickly than the Kimya PEKK-A and may attain higher mechanical properties. It is more difficult to print than the Kimya PEKK-A and requires a printer with a heating plate, closed chamber and extruder able to operate at up to 350°C minimum.

The Kimya PEKK-A and Kimya PEKK-SC filaments are both sold in their amorphous form. The crystallization process takes place during an annealing stage for the Kimya PEKK-A and during printing for the Kimya PEKK-SC. In its crystalline form, the Kimya PEKK-SC can resist temperatures of up to 260°C in continuous use. The Kimya PEKK-SC has obtained several fire/smoke standards and is eligible for:
The Kimya PEKK-SC has obtained several fire/smoke standards and is eligible for:

  • UL94 V0 @0.8MM
  • EN45545 HL3: R22 R23
  • FAR 25.853

This makes it particularly interesting for aerospace and railway applications where fire and smoke resistance is of fundamental importance.

The Kimya PEKK-A is also part of our high-performance materials range

Which print settings to choose?

We have carried out multiple printing tests using the Kimya PEKK-SC and our recommendations are as follows:

  • Extrusion temperature: 350-400°C
  • Bed temperature: 110-170°C
  • Chamber temperature: up to 150°C/li>
  • Print speed: 20-40 mm/s

The print settings are naturally specific to each 3D printer. We recommend that you conduct several tests before establishing your preferred settings. Please don’t hesitate to contact our sales team if you need any help in making the right choice!