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Vestakeep® 5000G PEEK Granules

Grade: Vestakeep® 5000G
Formula: PEEK
Form: Granule
Material: Polyetheretherketone (PEEK)
CAS Number: 29658-26-2
Commodity: Polymers
Nominal Granule Size: 6mm
Viscosity: High Viscosity
The Vestakeep® 5000G PEEK Granules is part of Goodfellow's range of high-performance polymer granules. With 14 variations available, these granules exhibit excellent mechanical and dielectric properties, as well as high temperature and chemical resistance. They are widely used in demanding applications like bearings, piston parts, pumps, and valve seats across industries such as aviation, automotive, oil and gas, semiconductor, and chemical processing. The combination of properties and availability in small quantities makes Vestakeep® 5000G suitable for prototyping and specialty composite production.
Technical Data Sheet Safety Data Sheet Tolerance Properties
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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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