Teflon® Products Fluoropolymer Comparison

   

Typical Properties

Typical Properties
Material Codes
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Mechanical Properties

Property
ASTM Standard
Unit
Teflon® PTFE Teflon® FEP Teflon® PFA Teflon® ETFE
Specific Gravity
D792
--
2.15
2.15
2.15
1.76
Tensile Strength
D1457
D1708
D638
MPa
(psi)
21-34
(3,000-5,000)
23
(3,400)
25
(3,600)
40-46
(5,800-6,700)
Elongation
D1457
D1708
D638
%
300-500
325
300
150-300
Flexural Modulus
D790
MPa
(psi)
496
(72,000)
586
(85,000)
586
(85,000)
1,172
(170,000)
Folding Endurance
D2176
(MIT)
cycles
>106
5-80 x 103
10-500 x 103
10-27 x 103
Impact Strength
D256
J/m
(ft·lb/in)
189
(3.5)
No Break
No Break
No Break
Hardness
D2240
Shore D pencil
50-65 HB
56
HB
60
72
Coefficient of Friction, Dynamic
D1894
--
0.05-0.10
0.08-0.3
--
0.3-0.4

Thermal Properties

Property
ASTM Standard
Unit
Teflon®
PTFE
Teflon® FEP
Teflon® PFA
Teflon® ETFE
Melting Point
D3418
°C
(°F)
327
(621)
260
(500)
306
(582)
267
(512)
Cure
Temperature
--
°C
(°F)
379-429
(715-805)
360-385
(680-725)
379-399
(715-750)
302-323
(575-615)
Flame Rating*
UL94
--
V0
V0
V0
V0
Limiting Oxygen Index
D2863
%
>95
>95
>95
30-36
Heat of Combustion
D240
MJ/kg
(Btu/lb)
5.1
(2,200)
5.1
(2,200)
5.3
(2,300)
13.7
(5,900)

* 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
Teflon®
PTFE
Teflon® FEP
Teflon® PFA
Teflon® ETFE
Chemical/Solvent Resistance D543 -- Excellent Excellent Excellent Excellent
Water Absorption, 24 h D570 % <0.01 <0.01 <0.03 <0.03
Salt Spray Resistance (1)
-on aluminum
-on steel
B-117

Hours
Hours

744+
192

744+
--

1000
--

1000
--
Detergent Resistance (2)
-on aluminum
-on grit-blasted aluminum
-on grit-blasted steel
--
Hours
Hours
Hours

264
624
24

744
600
480

--
--
--

--
--
--
Weather Resistance Florida Exposure Years Unaffected 20 20 10 15

Notes:

1. Salt Spray Resistance: 5% NaCl at 35°C/95°F, hours to failure
2. Detergent Resistance: hours to failure

Electrical Properties

Property
ASTM Standard
Unit
Teflon®
PTFE
Teflon® FEP
Teflon® PFA
Teflon® ETFE
Dielectric Constant D150 1 MHz 2.1 2.1 2.1 2.6
Dielectic Strength* 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

* Dielectric Strength: 100 micrometers film

Vapor Transmission Rates

Vapor Transmission Rates of Teflon® FEP Film, 25 µm (1 mil) thickness/per ASTM E-96 (modified)
Values measured on thicker specimens and converted to 25 µm (1 mil)

Vapor Temperature, °C g/100 sq in. or g/625 sq cm (24 hr)
Acetic Acid 35 0.41
Acetone 35 0.95
Acetophenone 25 0.50
Benzene 35 0.64
Carbon Tetrachloride 35 0.31
Etyl Acetate 35 0.76
Hexane 35 0.56
Hydrochloric Acid, 20% 25 <0.01
Piperidine 25 0.04
Red Fuming Nitric Acid 25 7.5-1.4
Sodium Hydroxide, 50% 25 <0.01
Sulfuric Acid, 98% 25 0.00001
Water 39.5 0.40