Properties of PEEK

 

KETRON PEEK-1000 stock shapes are produced from virgin polyetheretherketone resin and offer the highest toughness and impact strength of all KETRON PEEK grades.

 

The composition of the raw materials used for the production of the KETRON PEEK-1000 natural stock shapes complies with the directives of the European Union and with the American FDA regulations concerning plastic materials intended to come into contact with foodstuffs. These features, added to its excellent sterilisability by means of steam, dry heat, ethylene oxide and gamma irradiation, make this grade very popular in medical*, pharmaceutical and food processing industries.

 

Physical Properties

Properties Test Methods ISO/(IEC) Units VALUES Colour - -   Density 1183 g/cm3 1.31 Water absorption :   - after 24h/96h immersion in water of 23°C (1)      - at saturation in air of 23°C / 50% RH    - at saturation in water of 23°C   62 62 - -   mg % % %   5/10 0.06/0.12 0.20 0.45 Thermal Properties Melting temperature _ °C 340 Thermal conductivity at 23°C - W/(K•m) 0.25 Coefficient of linear thermal expansion:   - average value between 23 and 100°C    - average value between 23 and 150°C    - average value above 150°C   - - -   m/(m•K) m/(m•K) m/(m•K)   50•10-6 55•10-6 130•10-6 Temperature of deflection under load:   - method A: 1.8 MPa   75   °C   160 Max. allowable service temperature in air:   - for short periods (2)   - continuously : for min. 20,000h (3)   - -   °C °C   310 250 Flammability (4):   - "Oxygen Index"   - according to UL 94 (1.5/3mm thickness)   4589 -   % -   35 V-0/V-0 Mechanical Properties at 23°C Tension test (5):   - tensile stress at yield (6)   - tensile strain at break (6)   - tensile modulus of elasticity (7)   527 527 527   MPa % mPA   110 20 4,400 Compression test (8):   - compressive stress at 1% nominal strain (7)   - compressive stress at 2% nominal strain (7)   604 604   MPa MPa   29 57 Charpy impack strength - Unnotched (9) 179/1eU kJ/m2 no break Charpy impact strength - Notched 179/1eA kJ/m2 3.5 Ball indentation hardness (10) 2039-1 N/mm2 230 Rockwell hardness (10) 2039-2 - M 105 Electical Properties at 23°C Electric strength (11) (60243) kV/mm 24 Volume resistivity (60093) Ω•cm >1014 Surface resistivity (60093) Ω >1013 Relative permittivity εr :   - at 100 Hz   - at 1 MHz (60250) (60250) -  - 3.2 3.2 Dielectric dissipation factor tan δ :   - at 100 Hz   - at 1 MHz (60250) (60250) -  - 0.001 0.002 Comparative tracking index (CTI) : (60112) - 150

 

Legend : 

1. According to method 1 of ISO 62 and done on discs Ø 50 x 3 mm.
2. Only for short time exposure (a few hours) in applications where no or only a very load is applied to the material.
3. Temperature resistance over a period of min. 20,000 hours. After this period of time, there is a decrease in tensile strength of about 50% as compared with the original value. The temperature value given here is thus based on the thermal-oxidation degradation which takes place and causes a reduction in properties. Note, however, that the maximum allowable service temperature depends in many cases essentially on the duration and the magnitude of the mechanical stresses to with the material is subjected.
4. These mostly estimated ratings, derived from raw material supplier data, are not intended to reflect hazardss presented by the materials under actual fire conditions. There is no UL-yellow card available for KETRON PEEK-1000 stock shapes.
5. Test specimens : Type 1 B.
6. Test speed : 5 mm/min.
7. Test speed : 1 mm/min.
8. Test specimens : cylinders Ø 12 x 30 mm.
9. Pendulum used : 4 J.
10. 10 mm thick test specimens.
11. 1 mm thick specimens.
    It is important to know that the electric strength of black KETRON PEEK-1000 can be as low as 50% of the value for natural material.

• This table is a valuable help in the choice of a material. The data listed here fall within the normal range of product properties of dry material.However, they are not guaranteed and they should not be used to establish material specification limits nor used alone as the basis of design.