FEP polymer

fep polymer (Fluorinated ethylene propylene) is a co polymer of hexafluoropropylene en tetrafluoroethylene. While FEP and PTFE are simular in many aspects, there are clear differences:

Lower thermic stabitity. FEP keeps its properties at temperatures of -200 to 204 ° C
Higher friction coefficient
More transparent than PTFE
Better gas and vapor permeability
Excellent UV transmission

Films made of FEP polymer are available from stock in thichnesses between 25 and 1000 micron.

Please find typical values of FEP polymer below:

PROPERTY	VALUE	UNITS	METHOD
Mechanical Properties
Tensile Strength, 23°C	2100-3050 14.5-21	psi MPa
Elongation at break, 23°C	240-300	%
Flexural Strength, 23°C	No break at flexure		D 790
Impact Strength, Izod	No break
Yield Strength At 23°C	1740 12	psi MPa
Density	2.12-2.17	gm/cu.cm
Thermal Properties
Coefficient of Linear Expansion 20-100 °C	12 x 10^-5	K^-1	D 696
Melting Point	253-282	°C
Thermal Conductivity	1.45 0.209	Btu/hr-.ft-deg F W/m/deg K
Service Temperature	-250-200	°C
Processing Temperature	370-395	°C
Electrical Properties
Dielectric Strength, short time, 2mm	MV m-1
Surface Arc-Resistance	>300 (does not track)	sec	D 495
Volume Resistivity, dry, @ 50% RH	>10¹⁸	ohm-cm	D 257
Surface Resistivity, @ 100% RH	10¹⁶	Ohm/sq	D 257
Dielectric Constant, 60 to 2 x 10⁹ cps	2.1	ε	D150-81
Dielectric Strength	13-100	kV mm-1	D149
Dissipation Factor @ 60 Hz – 1 MHz	<0.0001		D150-81
Other Properties
Refractive Index	1.344	nD 25	D 542
Water Absorption	<0.1	%	D570-81
Flame Rating+	VE-0		UL-94
Limiting Oxygen Index	95	% Oxygen	D 2863
Resistance to Weathering	Excellent
Specific Gravity	2.1-2.3		D792-66 (1979)
Coefficient of friction	0.27–0.67		D 1894

Other FEP products:

FEP heat shrink tubing

FEP vacuum formings

FEP tubing

FEP machined parts

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FEP polymer

FEP polymer

Other FEP products:

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