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Property	ASTM Standard	Unit	PTFE	FEP	PFA	ETFE
Specific Gravity	D792		2.15	2.15	2.15	1.76
Tensile Strength	D1457, D1708, D638	MPa	21-35	23	25	40-47
.		psi	3,000-5,000	3,600	3,600	5,800-6,700
Elongation	D1457, D1708, D638	%	300-500	300	300	150-300
Flexural Modulus	D790	MPa	500	600	600	1,200
.	.	psi	72,000	85,000	85,000	170,000
Folding Endurance	D2176	(MIT)	>10 6	5-80 x 10 3	10-500 x 10 3	10-27 x 10 3
	.	cycles	.	.	.	.
Impact Strength	D256	J/m	189	No break	No break	No break
.	.	ft.lb/in	3.5	.	.	.
Hardness	D2240	Shore D	50-65	56	60	72
.	.	pencil	HB	HB
Abrasion Resistance	.	.	.	.	.	.
- Bell Abrasion (1)	.	g/µm	85	.	.	.
- Sliding Arm (2)	.	mg	7.9-9.7	11.1-15.2	.	13.4
- Tabor Abrasion (3)	.	mg	12	14.8	.	.
Scratch Resistance	.	.	.	.	.	.
Scratch Master	.	.	.	.	.	.
- initial (4)	.	kg	5.7-7.0	5.1-11.4	.	.
- complete (5)	.	kg	7.3-10.7	8.5-13.2	.	.
Coefficient of Friction	D1894	.	.	.	.	.
- static	.	.	0.12-0.15	0.12-0.20	0.2	0.24-0.50
- dynamic	.	.	0.05-0.10	0.08-0.3	.	0.3-0.4
Contact Angle	.	.	.	.	.	.
- water	.	degree	104° -111°	95°-105°	104°-111°	90°-100°

Notes: 1. Bell Abrasion Tester: grams abrasive/micrometers 2. Sliding Arm Test: 1,000 cycles, 500 gr load, 400 Emery paper, 35.5 sq. cm surface 3. Tabor Abrasion: Cs 17 wheel, 1 kg load, 1,000 cycles, weight loss in mg 4. Scratch Master: initial = first sign of substrate 5. Scratch Master: complete = total removal of film 6. Salt Spray Resistance: 5% NaCl @ 35°C/95°F, hours to failure 7. Detergent Resistance: hours to failure 8. Dielectric Strength: 100 micrometers film

 

Thermal Properties
Property	ASTM Standard	Unit	PTFE	FEP	PFA	ETFE
Melting Point	D3418	°C	327	260	305	267
.	.	°F	621	500	582	512
Cure Temperature	.	°C	380-430	360-390	380-400	300-325
.	.	°F	715-805	680-735	715-750	575-615
Max. Use Temperature	.	.	.	.	.	.
- Continuous	.	°C	290	205	260	150
.	.	°F	550	400	500	300
- Intermittent	.	°C	315	230	290	200
.	.	°F	600	450	550	390
Flame Rating**	.	.	V0	V0	V0	V0
Limiting Oxygen Index	D2863	%	>95	>95	>95	30-36
Heat of Combustion	D240	MJ/kg	5.1	5.1	5.3	13.7
.	.	Btu/lb	2,200	2,200	2,300	5,900
Thermal Conductivity	.	Btu.in/h.ft2.°F	1.7	1.4	1.3	1.65
.	.	W/m-k	0.25	0.20	0.19	0.24
** Statements regarding behavior in a flame situation are not intended to reflect hazards presented by this or any other material when under actual fire conditions.

 

Chemical Properties
Property	ASTM Standard	Unit	PTFE	FEP	PFA	ETFE
Property Chemical/Solvent Resistance	D543	.	Excellent	Excellent	Excellent	Excellent
Water Absorption, 24 h	D570	%	< 0.01	< 0.01	< 0.01	< 0.03
Salt Spray Resistance (6)	B-117	.	.	.	.	.
- on aluminum	.	Hours	744+	744+	1000	1000
- on steel	.	Hours	192	.	.	.
Detergent Resistance (7)	.	.	.	.	.	.
- on aluminum	.	Hours	264	744	.	.
- on grit-blasted aluminum	.	Hours	624	600	.	.
- on grit-blasted steel	.	Hours	24	480	.	.
Weather Resistance	Florida Exposure	Years Unaffected	20	20	10	15

 

Electrical Properties
Property	ASTM Standard	Unit	PTFE	FEP	PFA	ETFE
Dielectric Constant	D150	1 MHz	2.1	2.1	2.1	2.6
Dielectric Strenght (8)	D149	V/µm	18	53	80	79
Dissipation Factor	D150	1 MHz	< 0.0001	0.0006	0.0001	0.007
Arc Resistance	D495	sec	>300	>300	>180	122
Volume Resistivity	D257	ohm.cm	1018	>1018	>1018	>1017
Surface Resistivity	D257	ohm/sq	>1018	>1016	>1017	>1015
* This data reproduced from published Dupont literature H-75151