Physical properties of fully fluorinated plastics

*Property*	Unit	PTFE	Mod. PTFE	Mold- flon^®	PFA	MFA	FEP
General
Permanent service temperature	°C	260	260	260	250	250	205
Specific gravity	g/cm3	2,13–2,20	2,13–2,19	2,14–2,18	2,12–2,17	2,12–2,17	2,12–2,17
Flammability	UL flamm-ability standard	V-0	V-0	V-0	V-0	V-0	V-0
Oxygen index	%	>95	>95	>95	>95	>95	>95
Water absorption	%	<0,01	<0,01	0,01	0,03	<0,03	<0,01
Thermal
Melting point	°C	327	327	315–324	300–310	280–290	253–282
Thermal conductivity	W/K x m	0,22–0,23	0,22–0,23	0,22–0,23	0,22	0,22	0,2
Coefficient of thermal expansion	1/K x 10^–5	12–17	12–17	12–16	10–16	12–20	8–14
Specific heat at 23°C	KJ/kg x m	1,01	1,01	1,03	1,09	1,09	1,17
Mechanical
Tensile strength at 23°C	MPa	29–39	29–39	23–32	27–32	22–36	19–25
Elongation at break	%	200–500	300–600	150–450	300	300–360	250-350
Modulus of elasticity in tension at 23°C	MPa	400– 800	650	400– 630	650	440– 550	350– 700
Shore hardness		55–72	59	55– 65	60– 65	59	55- 60
Friction coefficient Dyn. steel,dry		0,05–0,2	0,05–0,2	0,05–0,2	0,2–0,3	0,2–0,3	0,2–0,35
Electrical
Spec. volume resistivity	Ohm x cm	10¹⁸	10¹⁸	10¹⁸	10¹⁸	10¹⁸	10¹⁸
Dielectric constant at 10⁶ Hz		2,0–2,1	2,0–2,1	2,0–2,1	2,1	2,0	2,1
Dielectric loss factor at 10⁶ Hz	X10^–4	0,7	0,7	0,7–1,1	<5		<9
Surface resistivity	Ohm	10¹⁷	10¹⁷	10¹⁷	10¹⁷	10¹⁷	10¹⁶
Dielectric strength	KV/mm	40–100	50–110	50–100	50–80	34–38	50–80