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Teflon
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Properties |
ASTM standard |
Unit |
PTFE(F4) |
FEP(F46) |
PFA |
ETFE(F40) |
ECTFE(F30) |
Mechanical property |
Specific weight |
D792 |
|
2.15 |
2.15 |
2.15 |
1.76 |
1.68-1.69 |
Hardness |
D2240 |
R |
50-60 |
56 |
60 |
72 |
72 |
Frictional coefficient |
D1894 |
Static
Dynamic |
0.12-0.15 |
0.12-0.20 |
0.2 |
0.24-0.50 |
0.25 |
0.05-0.10 |
0.08-0.30 |
0.10-0.30 |
0.30-0.40 |
0.19 |
Tensile strength |
D1457 D1708 D638 |
MPa |
21-35 |
23 |
25 |
40-47 |
50 |
Tensile stretch |
D1457 D1708 D638 |
% |
300-500 |
325 |
300 |
150-300 |
260-290 |
Bending coefficient |
D790 |
Psi |
72000 |
85000 |
85000 |
170000 |
170000 |
Anti-impact strength |
D256 |
joule/meter |
189 |
no fracture |
no fracture |
no fracture |
no fracture |
Water contact angle |
|
degree |
104-111 |
95-105 |
104-111 |
90-100 |
95-100 |
Thermal property |
M.P. |
D3418 |
℃ |
327 |
260 |
305 |
267 |
235-240 |
Sintering temp. |
|
℃ |
380-430 |
360-390 |
380-400 |
300-325 |
250-270 |
Continuous working Temp. |
|
℃ |
290 |
205 |
260 |
150 |
150 |
Non-continuous working Temp. |
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℃ |
315 |
230 |
290 |
200 |
200 |
Flame grade |
UL94 |
|
V-0 |
V-0 |
V-0 |
V-0 |
V-0 |
Oxygen index, |
D2863 |
% |
＞95 |
＞95 |
＞95 |
30-36 |
52 |
Heat of combustion |
D240 |
million joule/kg |
5.1 |
5.1 |
5.3 |
13.7 |
13.7 |
Heat conductivity |
|
W/m.k |
0.25 |
0.2 |
0.19 |
0.24 |
0.14 |
Chemical property |
Chemical solvent resistance |
D534 |
|
excellent |
excellent |
excellent |
excellent |
excellent |
24H water absorption |
D570 |
% |
＜0.01 |
＜0.01 |
＜0.03 |
＜0.03 |
＜0.03 |
Resistance to salt fog(aluminum) |
B-117 |
hr. |
744+ |
744+ |
1000 |
1000+ |
1000+ |
Weathering resistance |
佛罗里大气候 |
车 |
20 |
20 |
10 |
15 |
15 |
Electric property |
Insulation constant |
D150 |
1MHZ |
2.1 |
2.1 |
2.1 |
2.6 |
2.6 |
Insulation strength |
D149 |
V/um |
18 |
53 |
80 |
79 |
79 |
Delectric coefficient |
D150 |
1MHZ |
＜0.0001 |
0.0006 |
0.0001 |
0.007 |
0.007 |
Electric arc resistance |
D495 |
Second |
＞300 |
＞300 |
＞180 |
122 |
122 |
Volume resistance |
D257 |
Ω.cm |
＞1018 |
＞1018 |
＞1018 |
＞1017 |
＞1014 |
Surface resistance |
D257 |
Ω/sqm. |
＞1018 |
＞1018 |
＞1017 |
＞1015 |
＞1014 |
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