|
Comparative For Fluorocarbon Resins |
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|
Property |
PTFE |
PFA |
FEP |
ETFE |
ECTFE |
PVF |
CTFE |
|
Specific Gravity |
2.15 |
2.16 |
2.15 |
1.70 |
1.68 |
1.77 |
2.13 |
|
Tensile Strength @ Brk., RT, % |
5000 |
4500 |
3000 |
6500 |
7000 |
4500 |
4000 |
|
Elongation @ Brk., RT, % |
400 |
300 |
290 |
150 |
200 |
50 |
140 |
|
Flex Strength, psi |
No Brk. |
N.A. |
3000 |
7100 |
7000 |
9500 |
8600 |
|
Flexural Modulus, psi x 105 |
.7-1.1 |
1.0 |
0.9 |
2.0 |
2.4 |
2.5 |
1.5 |
|
Hardness (Shore, Rockwell) |
D50-65 |
D60 |
D55, R45 |
D75, R50 |
D75, R95 |
R109 |
R109 |
|
Izod Impact Ft/Lbs/In - Notch, RT |
3 |
No Brk. |
No Brk. |
No Brk. |
No Brk. |
4 |
1.2 |
|
Melt Point, ÅF |
627 |
575-590 |
500-535 |
520 |
465 |
340 |
394 |
|
Max. Oper. Temp., Continuous ÅF |
550 |
500 |
400 |
350 |
340 |
265 |
350 |
|
Low Temp. Embrittlement, ÅF |
-450 |
N.A. |
-100 |
-150 |
-105 |
-80 |
-423 |
|
Deflection Temp., ÅF @ 66 psi |
250 |
N.A. |
158 |
220 |
240 |
270 |
258 |
|
Deflection Temp., ÅF @ 264 psi |
120 |
N.A. |
N.A. |
160 |
170 |
195 |
N.A. |
|
Thermal Expansion, 10-5/In/ÅC |
10.0 |
12 |
9.5 |
7 |
8 |
8.5 |
7.2 |
|
Dielectric Strength, V/mil (.001") |
4200 |
4000 |
6500 |
7000 |
2000 |
1280 |
3500 |
|
Dielectric Constant, 103 cycles |
2.1 |
2.1 |
2.1 |
2.6 |
2.6 |
7.7 |
2.5 |
|
Dissipation Factor, 103 cycles |
<.0003 |
.0002 |
<.0002 |
.0008 |
.0015 |
.018 |
.025 |
|
Water Vapor Permeability (ranked) |
5 |
6 |
5 |
4 |
2 |
3 |
1 (best) |
|
Chemical
Resistance |
1 |
1 |
1 |
2-3 |
2 |
4 |
2 |
|
Coef. of Friction |
1 |
2 |
3 |
4 |
4 |
5 |
5 |
|
NOTE: The above data chart is nominal and is intended solely for the purpose of selecting the most proper film for a particular application. When Thermoformed, these films may exhibit dimensional characteristics not discussed or measured above. Residual stresses left in the film from the thermoforming process can effect the maximum use temperature. Engineering assistance is readily available to aid the customer in the selection of the proper film. |
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