PTFE Disk

PTFE Disk combines exceptional chemical inertness, non-stick properties, and wide temperature tolerance in a precision-machined circular form. Its ability to resist most solvents, acids, and bases while maintaining dimensional stability makes it suitable for sealing, insulating, and protective applications. Industries use PTFE discs in chemical-resistant gaskets, low-friction thrust bearings, and dielectric spacers in electronic assemblies. Specific applications include corrosion-proof seals in analytical instruments, thermal insulators in high-vacuum systems, and non-stick surfaces in laboratory apparatus. In research, PTFE discs facilitate controlled chemical testing, electrical insulation studies, and tribological evaluations. Their combination of shape precision, chemical resistance, and low friction ensures vital functionality in engineering, laboratory, and industrial settings.

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Tolerance

Properties

Reference & Citations

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Tolerances

Disc

Thickness		±20%

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