PEEK electrical insulating films

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These films are non-reinforced and semi-crystalline from PEEK™ polyether ether ketone polymer. They offer engineers a material solution for high-performance applications. They have a unique combination of properties such as high temperature resistance, low weight, mechanical strength, durability, excellent radiation, hydrolysis and chemical resistance, electrical insulation, abrasion and wear resistance, excellent barrier properties with high purity, low flammability without the use of flame retardants, low toxicity of combustion products and low moisture absorption. The inherently flame-retardant films are easy to process.

Art.-Nr.

Application examples:

 

Industry Aerospace
Electrical insulation Pressure sensors
Adhesive tapes Speaker cones and voice coils
Printed circuit board substrates Capacitors
High-temperature labels Composite structures
Sealing washers in high-speed engines Suitable for use with lead-free solders
Sealing washers in cell phone hinges
Flexible heating elements

 

Standard thicknesses and widths:

 

The standard width of the film is 610 mm – widths up to 1500 mm on request. Standard thicknesses (in µm) – 12, 18, 25, 38, 50, 63, 75, 100, 125, 150, 200. Other thicknesses 250, 300, 500, 750 µm on request. The thickness tolerance is +/- 7 %.

 

Minimum purchase quantity 10kg 25 µm 50 µm 75 µm 100 µm 150 µm 200 µm 300 µm 500 µm
Surface area [m2] approx. 300 approx. 160 approx. 100 approx. 80 approx. 50 approx. 40 approx.26 approx.15

 

Figure 1:

Physical properties at 23 °C and 200 °C for film, 50 µm (ISO 527)

 

Mechanical properties with different film thicknesses:

ISO 527 at 23 °C
25 µm 50 µm 125 µm 250 µm
Tensile strength MPa 130 120 110 100
E-modulus GPa 3.0 2.8 2.4 2.2
Tear elongation % >150 >150 >150 >150

Electrical properties with different film thicknesses:

ATSM D149, 23°C, 1/4″ electrode
25 µm 50 µm 125 µm 250 µm
Dielectric strength kV/mm 270 190 120 70
Breakdown voltage kV 6.75 9.5 15 17.5

 

TEST METHOD TEST CONDITION UNIT 50 µm
PROPERTY
E-modulus ISO 527 23 ºC GPa 2,8
Tensile strength (at break) ISO 527 23 ºC M Pa 120
Tear elongation ISO 527 23 ºC % >150
Puncture resistance Def Stan 81-75 23 ºC kJ/m2 26
Tear strength ISO 6383-1 23 ºC N/m m 6,7
Shrinkage TM-VX-84 200 ºC % <2
Density ISO 1183 23 ºC kg/dm3 1,30
Water absorption (50 % relative humidity) ISO 62 23 ºC, 24h % 0,04
Linear coefficient of thermal expansion ASTM D696 MD, below Tg ppm 47
Dielectric strength ASTM D149 23 ºC, 1/4″ electrode kV/mm 190
Contact resistance ASTM D257 100 V, 23 ºC Ohm cm 4 x 1016
Dielectric constant ASTM D150 23 ºC, 10 MHz – 3,5
Dissipation factor tan δ ASTM D150 23 ºC, 10 MHz – 0,002

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