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Property Comparison of Various Fluoroplastics
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| Property |
ASTM test
test condition |
TFE |
PFA |
FEP |
ETFE |
PVdf |
CTFE |
Physical Properties |
Specific gravity |
D792 |
2.13 - 2.22 |
2.12 - 2.17 |
2.12 - 2.17 |
1.70 - 1.76 |
1.76 - 1.78 |
2.10 - 2.18 |
| Water absorption |
D570 / 24 hrs 1/3"t |
< 0.00 |
< 0.01 |
< 0.01 |
< 0.1 |
< 0.04 |
< 0.00 |
| Mold shrinkage |
|
0.02 - 0.05 |
0.02 - 0.05 |
0.03 - 0.06 |
0.03 - 0.04 |
0.014 |
0.015 - 0.020 |
| Contact Angle |
Angle to level |
110 |
115 |
114 |
96 |
82 |
84 |
|
Thermal Properties |
Thermal Conductivity
(cal/sec/cm2, oC/cm2) |
C117 |
6 x 10-4 |
|
6 x 10-4 |
5.7 x 10-4 |
3.0 x
10-4 |
4.7-5 x 3x10-4 |
Coefficient of linear
thermal expansion (1/ oC) |
D696 / 23-60oC |
10 x 10-5 |
12 x 10-5 |
8.3-10 x 10-5 |
5-9 x 10-5 |
4.2 x 10-5 |
4.5-7.0 x 10-5 |
| Melting point (oC) |
|
327 |
302 - 310 |
270 |
260 |
173 - 175 |
210 - 212 |
| Melt viscosity (poise) |
|
1011 - 1013
(340-380oC) |
104 - 105
(380oC) |
4x104 - 105
(300-330oC) |
104 - 105
(300-330oC) |
2x103 - 105
(210-270oC) |
107
(23oC) |
Maximum tep. for
continuous temp (oC/oF) |
|
260 / 500 |
260 / 500 |
200 / 392 |
150 / 302 |
150 / 302 |
120 / 248 |
|
Mechanical Properties |
Tensile strength
(kgf/cm2) |
D792 |
140 - 350 |
280 - 315 |
190 - 220 |
410 - 470 |
4000 - 600 |
320 - 420 |
| Elongation (%) |
D638/23oC |
200 - 400 |
280 - 300 |
250 - 330 |
420 - 440 |
420 - 450 |
200 - 250 |
Compression strength
(kgf/cm2) |
D638/23oC |
50 - 60 |
50 - 60 |
50 - 60 |
109 |
128 - 140 |
90 - 120 |
Tensile modulus
(kgf/cm2) |
D695/1%
deformation,
25oC |
4,000 |
- |
3,500 |
5,000-8,000 |
8,000-20,000 |
10,500-21,000 |
Flexural modulus
(kgf/cm2) |
D790/23oC |
5,000 - 6,000 |
6,600 - 7,000 |
5,000 - 6,500 |
9,000 - 14,000 |
14,000 -18,000 |
13,000 -18,000 |
Impact strength
(tt-lb/in) |
D256/23oC, Izod |
3.0 |
- |
No breakdown |
No breakdown |
20.7 |
2.5-2.7 |
| Hardness (Shore) |
Durometer |
D50 - D65 |
D60 |
D55 |
D75 |
D75-D85 |
D90 |
Deformation under
load (%) |
D621/125oC
70kgf/cm2,
24hrs. |
5.0 |
2.4 |
5.0 |
5.4 |
2.4 |
2.6 |
| |
D621/125oC
140kgf/cm2,
24hrs. |
7.0 |
2.7 |
3.0 |
2.3 |
0.7 |
0.2 |
| Static triction coefficient |
Coated-steel surface |
0.02 |
0.05 |
0.05 |
0.06 |
0.4 |
0.08 |
|
Electrical Properties |
Dielectric constant |
D150 / 103 Hz
D150 / 103 Hz |
2.13 - 2.22 |
2.12 - 2.17 |
2.12 - 2.17 |
1.70 - 1.76 |
1.76 - 1.78 |
2.10 - 2.18 |
| Dielectric disslpation factor |
D150 / 103 Hz
D150 / 103 Hz |
< 0.00 |
< 0.01 |
< 0.01 |
< 0.1 |
< 0.04 |
< 0.00 |
Dielectric breakdown
strength (V / mil) |
D150 / 106 Hz
1/8 in |
0.02 - 0.05 |
0.02 - 0.05 |
0.03 - 0.06 |
0.03 - 0.04 |
0.014 |
0.015 - 0.020 |
Volume resistivity
(ohm-cm) |
D257 |
110 |
115 |
114 |
96 |
82 |
84 |
| Chemical resistance |
|
Excellent |
Excellent |
Excellent |
Excellent |
Good |
Excellent |
| Weatherability |
|
Excellent |
Excellent |
Excellent |
Excellent |
Excellent |
Excellent |
| Combustibility (%) |
D2863-Oxygen
Concentration index |
< 95 |
< 95 |
< 95 |
31 |
43 |
< 95 |
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