The miracles of science™

Select Industry


Fluoroplastic Comparison - Typical Properties

The values shown represent average experiences from numerous testing sources and are not intended to be specifications. These values will vary depending upon the individual compositions of the primers and topcoats and the systems used.

For further information on the properties of these coating systems, and examples of how they have led to the development of new products, increased production rates, and resultant cost savings, consult DuPont.

 

TRADEMARK DISCLAIMER: All DuPont Fluorplastic products below are sold with the DuPont™brand however DuPont may grant a Teflon® trademark license for use with same. Unlicensed customers may refer to the duPont product only with the DuPont™ brand and product code as sold and depicted below. If you are interested in applying for our trademark licensing agreement contact DuPont.

Mechanical Properties

Property 
ASTM Standard
Unit
DuPont™ PTFE  DuPont™ FEP  DuPont™  PFA  DuPont™  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
DuPont™ PTFE
DuPont™  FEP
DuPont™ PFA 
DuPont™ 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
DuPont™ PTFE 
DuPont™ FEP
DuPont™ PFA 
DuPont™ 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
DuPont™ PTFE 
DuPont™ FEP
DuPont™ PFA 
DuPont™ 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 DuPont™ 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


Note: All technical advice, application suggestions, recommendations and services are rendered by the seller gratis. They are based on technical data which the Seller believes to be reliable and are intended for use by persons having skill and know-how, at their own discretion and risk. Seller assumes no responsibility for results obtained or damages incurred from their use by Buyer in wholer or in part. Such technical advice, application suggestions, recommendations or services are not to be taken as a license to operate under, or intended to suggest infringement of, any existing patent.