FEP Copolymer Disk

FEP Copolymer Disk, made from poly(tetrafluoroethylene-co-hexafluoropropylene), combines the outstanding chemical inertness, thermal stability, and low dielectric properties of PTFE with enhanced melt processability provided by hexafluoropropylene units. It resists virtually all chemical reagents, maintains dimensional stability over a wide temperature range, and exhibits very low moisture absorption. The disk form offers precise, uniform surfaces suitable for sealing, insulation, and dielectric applications. Industries making extensive use of FEP Copolymer Disks include electronics, chemical processing, and aerospace. Specific technologies benefiting from this material include low-loss microwave circuit substrates, corrosion-proof sealing interfaces in chemical reactors, and protective dielectric spacers in high-voltage equipment. In research, these disks are valued for testing dielectric performance under varying thermal and chemical conditions, supporting development of next-generation high-frequency and chemically resistant components. The balance of electrical stability, chemical resistance, and ease of fabrication makes FEP Copolymer Disks a critical material in both advanced industrial manufacturing and precision scientific engineering.

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Tolerance

Properties

Reference & Citations

each

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	0.27-0.67
Hardness - Rockwell	R25-45, 60 Shore D
Poisson's ratio	0.48
Elongation at break( % )	150-300
Tensile modulus( GPa )	0.5-0.6
Izod impact strength( J m⁻¹ )	999999No Break
Tensile strength( MPa )	14-30

Electrical Properties

Element	Value
Dielectric constant @1MHz	2.1
Dissipation factor @ 1MHz	0.0007
Dielectric strength( kV mm⁻¹ )	20@3.2mm
Surface resistivity( Ohm/sq )	10¹⁶
Volume resistivity( Ohmcm )	10¹⁸

Physical Properties

Element	Value
Flammability	V0
Radiation resistance	Poor
Refractive index	1.344
Resistance to Ultra-violet	Excellent
Limiting oxygen index( % )	95
Water absorption( % )	0.01
Density( gcm⁻³ )	2.15

Thermal Properties

Element	Value
Heat-deflection temperature - 0.45MPa( C )	50
Heat-deflection temperature - 1.8MPa( C )	70
Lower working temperature( C )	-250
Upper working temperature( C )	150-200
Specific heat( J K⁻¹ kg⁻¹ )	1100
Thermal conductivity( W m⁻¹ K⁻¹ )	0.19-0.24@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	83-104