Kepstan® 8001

Alternative and trade names
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KEPSTAN® PEKK resin is a high performance thermoplastic material, based on PolyEtherKetoneKetone (PEKK) highly stable chemical backbone. Its semi crystalline structure in solid state offers an outstanding combination of mechanical and thermal strength together with chemical and fire resistance.

The 8000 Series offers the highest glass transition temperature and the highest degree of crystallinity, leading to the best tensile and compression strengths among the wide range of PEKK copolymers within the KEPSTAN® product range.

KEPSTAN® 8000 Series includes a low flow grade, KEPSTAN® 8001, and a medium flow grade, KEPSTAN® 8002, both unfilled pure PEKK resins designed to meet the requirements of a broad range of melt processing technologies, including among others extrusion of stock shapes, tubes, films, extrusion compression, compression molding, injection molding of thick or complex and thin-walled parts.

KEPSTAN® PEKK resin is available in pellet form and in powder form with different particle sizes. Standard packaging includes 20 kg boxes for pellets and 10 kg boxes for powders.

This material data has been provided by Arkema Technical Polymers.

"Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

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PropertyValueConditionTesting Standard


1.29 g/cm³

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ISO 1183

Limiting oxygen index

35 %

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ISO 4589-1/-2


PropertyTemperatureValueConditionTesting StandardComment

Elastic modulus

3.8 GPa

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ISO 527-1/-2

Impact strength, Charpy notched

-30 °C

5 kJ/m²

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ISO 179/1eA

23 °C

5 kJ/m²

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ISO 179/1eA

Impact strength, Charpy unnotched

-30 °C

50 kJ/m²

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ISO 179/1eU

No Break at 23°C


PropertyValueConditionTesting StandardPressure

Heat deflection temperature

175 °C

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ISO 75-1/-2

2 MPa


PropertyValueConditionFrequencyTesting Standard

Dielectric constant

2.6 [-]

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IEC 60250

Rheological Properties

PropertyValueConditionTesting StandardComment

Melt volume-flow rate

18 cm³/10min

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ISO 1133


Technological properties

Application areas

Metal Tube Coating,Chemical Process Industry,Chemical Process Industry - Injection Molding,Chemical Process Industry - Stock Shapes,Monofilaments,Connectors E&E,Performance Wire,Wire and Cables,Natural Gas Distribution- Fittings,Natural Gas Distribution- Pipes,Offshore Flexible Pipes

Processing methods

Injection Molding:

  • Drying temperature and time: 150°C for 3 to 4 hours or 120°C for 6 to 8 hours
  • Processing temperature: 375 – 385°C
  • Temperature settings - Injection: Rear 350°C / Center 375°C / Front 375°C / Nozzle 385°C
  • Mold temperature (to facilitate filling of the cavity and polymer crystallization): 220 - 240°C
  • Temperature settings - Extrusion Zones 1/2/3/4: 340°C/ 360°C/ 380°C/ 380°C Die: 370°C