Vestakeep® 5000G PEEK Granules

Vestakeep® 5000G PEEK Granules are an unreinforced, high-viscosity PEEK resin designed for injection molding and extrusion when thin sections, chemical exposure, and long heat service converge. The polymer’s semi-crystalline backbone supports stable mechanical performance and dielectric integrity where commodity plastics soften or stress-crack, allowing designers to replace metal in compact housings, valve and pump components, manifolds, and structural insulators. Aerospace, transportation, and industrial equipment makers value its resistance to fuels, oils, and cleaners, along with low outgassing and inherent flame performance for reliable compliance. Specific technologies that benefit include high-temperature connectors, sensor carriers near engines, and precision fluid-handling parts that must keep threads and seals crisp after cycling. In R&D and production, 5000G’s processing window and surface finish enable crisp ribs and bosses with minimal secondary work, giving teams a durable, halogen-free platform for long-life parts in harsh environments.

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Properties

Reference & Citations

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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