PTFE Powder

PTFE Powder, composed of polytetrafluoroethylene, is widely utilized for its exceptional thermal stability, chemical inertness, and extremely low coefficient of friction. These properties make it invaluable in demanding environments such as chemical processing, tribological interfaces, and advanced coatings. PTFE Powder is extensively used in oilfield equipment, elastomeric composites, dental prosthetics, and anti-friction coatings. In tribological systems, modified PTFE particles reduce wear and enhance compatibility with rubber matrices. In dental and biomedical fields, its low bacterial adhesion and impact resistance promote hygienic, biocompatible design. PTFE also sees growing use in microelectromechanical systems (MEMS) and as a filler in fluoropolymer blends for sensor encapsulation and dielectric shielding. Research has highlighted its utility in nanocomposite formulations, creating tailored materials for high-load and corrosive applications. This powder form continues to expand its relevance across sectors requiring engineered surfaces, reduced friction, and long-lasting chemical resistance.

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Tolerance

Properties

Reference & Citations

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Tolerances

Powder

Mean Particle Size		Nominal
Minimum Particle Size		Nominal
Maximum Particle Size		Nominal
Maximum Particle Size		Nominal
Particle Size D10		Nominal
Particle Size D50		Nominal
Particle Size D90		Nominal

Material Properties for Polymers

Chemical Resistance

Element	Value
Acids - concentrated	Good
Acids - dilute	Good
Alcohols	Good
Alkalis	Good
Aromatic hydrocarbons	Good
Greases and Oils	Good
Halogenated Hydrocarbons	Good
Halogens	Good
Ketones	Good

Mechanical Properties

Element	Value
Coefficient of friction	0.05-0.2
Hardness - Rockwell	D50-55 - Shore
Poisson's ratio	0.46
Elongation at break( % )	400
Tensile modulus( GPa )	0.3-0.8
Izod impact strength( J m⁻¹ )	160
Tensile strength( MPa )	Oct-40

Electrical Properties

Element	Value
Dielectric constant @1MHz	2-2.1
Dissipation factor @ 1MHz	0.0003-0.0007
Dielectric strength( kV mm⁻¹ )	50-170
Surface resistivity( Ohm/sq )	10¹⁷
Volume resistivity( Ohmcm )	10¹⁸-10¹⁹

Physical Properties

Element	Value
Flammability	V0
Radiation resistance	Poor
Refractive index	1.38
Resistance to Ultra-violet	Excellent
Limiting oxygen index( % )	95
Water absorption - over 24 hours( % )	0.01
Density( gcm⁻³ )	2.2

Thermal Properties

Element	Value
Heat-deflection temperature - 0.45MPa( C )	120
Heat-deflection temperature - 1.8MPa( C )	54
Lower working temperature( C )	-260
Upper working temperature( C )	180-260
Specific heat( J K⁻¹ kg⁻¹ )	1000
Thermal conductivity( W m⁻¹ K⁻¹ )	0.25@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	100-160