Kepstan® 7002

Alternative and trade names
PEKK
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Description

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.

Among the KEPSTAN® family, the 7000 Series benefits uniquely from PEKK crystalline capabilities while reducing significantly processing temperatures compared to the more crystalline 8000 Series. With a reduced melting temperature (® decreased by 25°C) and a Tg above 160°C, the KEPSTAN® 7000 Series resins are highly enabling in the field of continuous fiber composites for structural applications.

KEPSTAN® 7000 Series includes a medium flow grade, KEPSTAN® 7002, and a high flow grade, KEPSTAN® 7003, both unfilled PEKK resins designed to meet the requirements of a broad range of melt processing technologies, including among others extrusion, injection molding, fiber impregnation, consolidation and composite forming technologies.

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.

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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Properties

General

PropertyValueConditionTesting Standard

Density

1.29 g/cm³

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dry

ISO 1183

Limiting oxygen index

35 %

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dry

ISO 4589-1/-2

Mechanical

PropertyTemperatureValueConditionTesting Standard

Elastic modulus

3.8 GPa

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dry

ISO 527-1/-2

Impact strength, Charpy notched

-30 °C

4.5 kJ/m²

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dry

ISO 179/1eA

23 °C

4.5 kJ/m²

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dry

ISO 179/1eA

Impact strength, Charpy unnotched

-30 °C

41 kJ/m²

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dry

ISO 179/1eU

23 °C

62 kJ/m²

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dry

ISO 179/1eU

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Thermal

PropertyValueConditionTesting StandardPressure

Heat deflection temperature

172 °C

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dry

ISO 75-1/-2

2 MPa

Electrical

PropertyValueConditionFrequencyTesting Standard

Dielectric constant

2.6 [-]

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dry

1MHz

IEC 60250

Rheological Properties

PropertyValueConditionTesting StandardComment

Melt volume-flow rate

6 cm³/10min

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dry

ISO 1133

380°C/1kg

Technological properties

Property
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: 340 – 360°C
  • Temperature settings - Injection: Rear 320°C / Center 340°C / Front 350°C / Nozzle 360°C
  • Mold temperature (to facilitate filling of the cavity and polymer crystallization): 230 - 250°C
  • Temperature settings - Extrusion Zones 1/2/3/4: 290°C/ 320°C/ 350°C/ 340°C Die: 340°C