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Formula: PEEK
Form: Coil
Material: Polyetheretherketone (PEEK)
CAS Number: 29658-26-2
Commodity: Polymers
Structure: Amorphous
Transparency: Transparent Pale Amber
PEEK Coil is a high-performance polyetheretherketone polymer film supplied in a continuous roll format, prized for its exceptional mechanical strength, thermal stability, and chemical resistance. It maintains structural integrity at temperatures exceeding 250 °C, while its resistance to aggressive chemicals enables long-term performance in harsh environments. PEEK coils are extensively used across aerospace, electronics, and biomedical industries, where high-performance insulation, structural components, and chemically inert barriers are required. Key uses include insulation in high-temperature electrical systems, chemically resistant liners in analytical instruments, and precision-engineered components in microfabrication processes. In research and innovation, PEEK’s stability under thermal cycling and its machinability make it indispensable for prototyping advanced devices and fabricating components in environments where failure is not an option. Its balance of mechanical resilience, processability, and chemical inertness underpins its value in both cutting-edge scientific exploration and demanding industrial applications.
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Tolerances

Coil
Thickness ±20%

Material Properties for Polymers

Chemical Resistance
Element Value
Acids - concentrated Good-Poor
Acids - dilute Good
Alcohols Good
Alkalis Good
Aromatic hydrocarbons Good
Greases and Oils Good
Halogenated Hydrocarbons Good
Halogens Good-Poor
Ketones Good-Poor
Mechanical Properties
Element Value
Coefficient of friction 0.18
Hardness - Rockwell M99
Poisson's ratio 0.4
Elongation at break( % ) 50
Tensile modulus( GPa ) 3.7-4
Izod impact strength( J m⁻¹ ) 85
Tensile strength( MPa ) 70-100
Electrical Properties
Element Value
Dielectric constant @1kHz 3.2-3.3@50Hz-10Khz
Dissipation factor @ 1MHz 0.003
Dielectric strength( kV mm⁻¹ ) 190@50µm
Volume resistivity( Ohmcm ) 10¹⁵-10¹⁶
Physical Properties
Element Value
Flammability V-0 @ 1.5mm
Radiation resistance Good
Resistance to Ultra-violet Fair
Limiting oxygen index( % ) 35
Water absorption - equilibrium( % ) 0.5
Water absorption - over 24 hours( % ) 0.1-0.3
Density( gcm⁻³ ) 1.26-1.32
Thermal Properties
Element Value
Heat-deflection temperature - 0.45MPa( C ) 260
Heat-deflection temperature - 1.8MPa( C ) 160
Upper working temperature( C ) 250
Specific heat( J K⁻¹ kg⁻¹ ) 1340
Thermal conductivity( W m⁻¹ K⁻¹ ) 0.25@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 47-108

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