Essentium PEKK View larger

Essentium PEKK


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562,50 €
562,50 €

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High temperature PEEK, inherently flame retardant. Ideal for aerospace, oil & gas, and military applications.

Essentium is a US company with subdivisions in Asia and Europe. Their product portfolio includes industrial 3D printers and technical filament. Their innovative solutions are revolutionizing the 3D printing world and helping many companies seamlessly integrate into Industry 4.0. Thanks to Essentium, many manufacturers are able to prototype and manufacture in-house on a large scale, in an affordable and quick fashion. The Essentium portfolio contains numerous high-end technical filaments, mostly polymers and blends optimized for exceptional strength, flexibility and high mechanical performance in the most demanding conditions. The Essentium filaments have many applications across numerous disciplines, such as aerospace and defense, automotive, biomedical, contract manufacturing, consumer goods, and electronic manufacturing.

Advanced technical filament

The Essentium PEKK filament belongs to the family of advanced filaments and it is mostly dedicated to the aerospace and defense industries. The Essentium PEKK filament was made with Arkema 6002 Kepstan™ resin. PEKK stands for polyetherketoneketone - a semi-crystalline thermoplastic from the PAEK (poliartercetona) family of polymers. PEKK was first developed in 1988 by Dupont for the aerospace industry. At the beginning of the 21st century the composition of PEKK was further improved by Oxford Performance Materials, bought by Arkema in 2009.

PEKK is very similar to PEEK in terms of performance. There are, however, some differences that make PEKK a superior material. The main distinguishing feature is the ether/ketone ratio. PEKK has more ketone bonds, which are more flexible than ether links. This makes the polymer chains of PEKK more rigid and elevates the glass transition temperature and the melting temperature (the extrusion temperature of the Essentium PEKK is between 340 - 400 ºC). Furthermore, the naturally slow crystallization rate of PEKK gives it some properties of an amorphous polymer. The result is that PEKK is less sensitive to cooling, which improves its adhesion to the printing base and reduces the risk of warping and dimensional imprecision, making PEKK a very cooperative material in terms of 3D printing. The melting temperature and the speed of crystallization of PEKK can be modified by varying the position of the ketone bonds in PEKK’s aroma cycle. What’s more, PEKK has better aesthetic properties, it is quite lightweight (no influence on performance), and it is more resistant to use, friction, abrasion and chemicals. Among PEKK’s advanced properties are the great insulation capacity and good dielectric stability, which makes it viable for applications in electronics. Moreover, PEKK is inherently flame retardant and it doesn’t produce toxic smoke, which complies with the FAA (Federal Aviation Administration) FAR 25.853 requirements and makes the Essentium PEKK filament suitable for flight-ready components.

Parts 3D printed with the Essentium PEKK filamentParts 3D printed with the Essentium PEKK filamentParts 3D printed with the Essentium PEKK filament

Image 1. Parts 3D printed with the Essentium PEKK filament. Source: Essentium.

The high-performance Essentium PEKK filament possesses all those properties. This makes it the ideal material for highly advanced applications where the 3D printed pieces need to be reliable, durable, and resistant to abrasion by constant use, able to handle very high temperatures and pressures over long periods of time, and able to withstand contact with chemicals. Essentium recommends using the PEKK filament in the aerospace industry, the oil and gas industry, in military contexts, in the railway industry, in semiconductor manufacturing, in chemical processing and other industrial applications where a strong, light and resistant is required to perform advanced and reliable tasks in harsh and extreme environments.

Impact strength (KJ/m2) 5.5
Elongation at break (%) 75.8
Tensile strength (MPa) 82.9
Tensile modulus (MPa) 3040
Flexural strength (MPa) 114.3
Flexural modulus (MPa) 2370
Softening temperature (ºC) 139
Abrasion resistance Abrasion resistance
Fatigue resistance Fatigue resistance
Fireproof Fireproof
Lightweight Lightweight
Chemical resistance Chemical resistance
Hide color variations (Hide color variations)

The Essentium PEKK is a hygroscopic filament. It should be stored in a vacuum sealed packaging before and during printing, with the Slice Engineering filament drying capsule inside of the spool for even better results. Another option is to store filament in a drying cabinet or case, such as the Fiber Three drying case, available in the version F3 Safe Light or F3 Safe Long Run. If the material absorbs more than 200ppm moisture, it should be dried in a low dew point oven or vacuum oven at 120 ˚C for 3 – 8 hours. More care instructions can be found in the technical datasheet in the downloads section.

The recommended printing surface for the Essentium PEKK filament is G-14 phenolic build sheet with a thin layer of Magigoo HT or VM Nano to facilitate the removal of parts.

To see the exact printing parameters and manufacturer recommendations for this product, see the technical datasheet in the downloads section.

General information
Manufacturer Essentium
Material PEKK
Format Spool of 750 g
Density 1.27 g/cm3
Diameter of filament 1.75 mm
Diameter tolerance ±0,05 mm
Filament length ±245.5 m (Ø 1.75 mm-0.75 Kg)
Color Amber
RAL/Pantone  -
Print settings
Printing temperature 350-400 ºC
Print bed temperature 100 - 150 ºC
Chamber temperature Not required
Cooling fan 0 - 20 %
Recommended printing speed 20 - 50 mm/s
Nozzle diameter -
Mechanical properties
Izod impact strength (ISO 180) XY 5.5 KJm2
45/45 3.6 KJm2
ZX 3.4 KJm2
Charpy impact strength -
Elongation at break (ISO 527-2) XY 75.8 %
45/45 4.9 %
ZX 4.4 %
Tensile strength (ISO 527-2) XY 82.9 MPa
45/45 48.4 MPa
ZX 63.7 MPa
Tensile Modulus (ISO 527-2) XY 3040 MPa
45/45 2250 MPa
ZX 1950 MPa
Flexural strength (ISO 178) XY 114.3 MPa
45/45 91.6 MPa
ZX 106.5 MPa
Flexural modulus (ISO 178) XY 2370 MPa
45/45 2080 MPa
ZX 2430 MPa
Surface hardness -
Thermal properties
Softening temperature (ISO 75) 139 ºC
Melting temperature (ISO 11357) 300 ºC
Decomposition temperature >500 ºC
Inflammability (UL 94 @0.8mm) V-0 Class
Glass transition temperature (ISO 11357) 160 ºC
Limiting Oxygen Index (ISO 4589-2 @1.6mm) 38
Specific properties
Transparency  -
Surface Resistivity (IEC 60093 @23 ºC) 1.0 E+16 Ohm
Additional Information
HS Code 3916.9
Spool Diameter (outer) -
Spool Diameter  (inner hole) -
Spool Width -

* The typical values detailed in this table should be considered as a reference. Actual values may vary depending on the 3D printer model used, part design and printing conditions. We recommend confirming the results and final properties with own tests. For more information you should consult the technical data sheet of the product.


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