Common properties for selecting compounds
| Properties | Bronze | Carbon | Carbon Fiber | Ceramic | Ceramer | Ekonol | Glass Fiber | Graphite | Mineral | Molybdenum | Polymide | Stainless Steel |
| Chemical Agent Resistance | X | X | X | X | X | X | X | X | X | |||
| Compression Resistance | X | X | X | X | X | X | X | |||||
| Deformation Under Load | X | X | X | X | X | X | X | |||||
| Electrical Insulation | X | X | X | X | X | |||||||
| High Temperature Resistance | X | X | X | X | X | X | X | X | X | X | X | |
| Low Coefficient of Friction | X | X | X | X | X | X | X | |||||
| Lubrication | X | X | X | X | X | X | ||||||
| Thermal Conductivity | X | X | X | X | ||||||||
| Thermal Stability | X | X | X | X | X | X | X | X | X | X | X | |
| Wear Resistance | X | X | X | X | X | X | X | X | X | X | X |
Typical applications/end uses
| Applications | Bronze | Carbon | Carbon Fiber | Ceramic | Ceramer | Ekonol | Glass Fiber | Graphite | Mineral | Molybdenum | Polymide | Stainless Steel |
| Compressor Rings | X | X | X | X | X | X | X | X | X | X | X | |
| Gaskets | X | X | X | X | X | X | X | |||||
| Piston Rings & Seals | X | X | X | X | ||||||||
| Plates & Bars | X | X | X | X | X | |||||||
| Sealing Elements | X | X | X | X | X | X | X | X | ||||
| Bearings | X | X | X | X | X | X | X | X | X | |||
| Valve Seats | X | X | X | X | X | X | X |
Typical properties of filled PTFE compounds
|
Filler |
Description |
Tensile Strength |
Elongation |
Specific Gravity |
Bulk Density |
Hardness |
Deformation Under Load |
Coefficient of Thermal Expansion |
Coefficient of Friction – Static |
Coefficient of Friction – Dynamic |
Dielectric Strength |
Wear Factor K x 10-10 |
|
Test Method |
ASTM D4745 |
ASTM D4745 |
ASTM D4745 |
ASTM D4745 |
ASTM D2240 |
ASTM D621 |
ASTM D696 |
ASTM D1894 |
ASTM D1894 |
ASTM D149A |
||
|
Units |
psi |
% |
g/cc |
g/l |
Shore D |
% |
In/in/°F x 10-5 |
In3-min/lb-ft-hr |
||||
|
None |
Virgin PTFE |
6000 |
350 |
2.15 |
400 |
58 |
7.9 |
6.8 |
0.09 |
0.07 |
1500 |
15,000 |
|
PCI UNF LF pigmented |
5000 |
340 |
2.16 |
— |
58 |
7.3 |
6.5 |
0.07 |
0.06 |
— |
— |
|
|
Glass-filled PTFE |
PCI 10 FG LF |
4000 |
310 |
2.20 |
— |
55 |
6.1 |
6.3 |
0.04 |
0.07 |
— |
— |
|
PCI 15 FG LF |
3400 |
290 |
2.23 |
350 |
59 |
4.1 |
5.7 |
0.09 |
0.05 |
430 |
7 |
|
|
PCI 15 FG FF |
2700 |
250 |
2.23 |
780 |
||||||||
|
PCI 15 FG LF pigmented |
3000 |
250 |
2.22 |
350 |
58 |
4.1 |
5.7 |
0.09 |
0.05 |
430 |
6 |
|
|
PCI 25 FG LF |
2950 |
265 |
2.24 |
385 |
60 |
3.9 |
4.3 |
0.12 |
0.07 |
320 |
6 |
|
|
PCI 25 FG FF |
2000 |
200 |
2.24 |
785 |
||||||||
|
PCI 25 FG LF pigmented |
2500 |
220 |
2.23 |
350 |
58 |
3.9 |
4.3 |
0.12 |
0.07 |
320 |
6 |
|
|
Graphite-filled PTFE |
PCI 10 GR FF |
2800 |
220 |
2.16 |
730 |
— |
5.8 |
6.8 |
0.05 |
0.07 |
44 |
|
|
PCI 15 GR LF |
3000 |
210 |
2.16 |
— |
63 |
2.5 |
5.9 |
0.07 |
0.05 |
60 |
30 |
|
|
PCI 15 GR FF |
2000 |
160 |
2.16 |
695 |
||||||||
|
Bronze-filled PTFE |
PCI 60 BZ LF |
2500 |
175 |
3.95 |
— |
67 |
2.3 |
4.3 |
0.13 |
0.07 |
— |
5 |
|
PCI 60 BZ FF |
2450 |
105 |
3.91 |
1350 |
||||||||
|
Aromatic Polyester (Polymer)-filled PTFE |
PCI 10 EK LF |
3200 |
325 |
2.05 |
— |
56 |
3.2 |
6.4 |
0.09 |
0.05 |
— |
5 |
|
PCI 10 EK LF |
3200 |
325 |
2.05 |
— |
||||||||
|
Bronze / Moly-filled PTFE |
PCI 55 BZ 5 SM LF |
2500 |
110 |
3.65 |
— |
62 |
2.0 |
3.9 |
0.13 |
0.09 |
— |
5 |
|
PCI 55 BZ 5 SM FF |
1885 |
65 |
3.50 |
1200 |
||||||||
|
Glass / Moly-filled PTFE |
PCI 15 FG 5 M LF |
3300 |
220 |
2.24 |
— |
63 |
3.8 |
5.2 |
0.06 |
0.04 |
— |
9 |
|
PCI 15 FG 5 M FF |
2600 |
190 |
2.24 |
785 |
||||||||
|
Carbon / Graphite-filled PTFE |
PCI 25C/GR LF |
2100 |
110 |
2.07 |
— |
61 |
2.0 |
5.9 |
0.9 |
0.08 |
— |
6 |
|
PCI 25C/GR FF |
1900 |
90 |
2.08 |
700 |
||||||||
|
Proprietary |
PCI Tuffsheet® LF |
2100 |
150 |
2.04 |
275 |
64 |
— |
— |
— |
0.21 |
— |
54 |
|
Filler |
Description |
Tensile Strength |
Elongation |
Specific |
Bulk |
Hardness |
|
Test Method |
ASTM |
ASTM |
ASTM |
ASTM |
ASTM |
|
|
Units |
psi |
% |
g/cc |
g/l |
Shore D |
|
|
Carbon-filled PTFE |
PCI 10 C LF |
3300 |
255 |
2.11 |
— |
— |
|
PCI 25 C LF |
2200 |
85 |
2.05 |
— |
65 |
|
|
PCI 30 C LF |
1700 |
55 |
2.03 |
— |
70 |
|
|
Graphite-filled PTFE |
PCI 25 GR LF |
1900 |
75 |
2.08 |
— |
— |
|
Bronze-filled PTFE |
PCI 40 BZ LF |
3800 |
260 |
3.10 |
— |
60 |
|
PCI 40 BZ FF |
3160 |
215 |
3.10 |
1100 |
||
|
Stainless Steel-filled PTFE |
PCI 50 SS FF |
2100 |
200 |
3.30 |
1100 |
— |
|
Molybdenum Disulfide (MoS2) -filled PTFE |
PCI 5 M LF |
4300 |
280 |
2.22 |
— |
— |
|
Wollastonite-filled PTFE |
PCI 15 Min LF |
3800 |
325 |
2.23 |
— |
60 |
|
PCI 15 Min FF |
2500 |
240 |
2.28 |
680 |
||
|
Carbon Fiber-filled PTFE |
PCI 10 CF LF |
3800 |
280 |
2.08 |
— |
— |
|
PCI 10 CF FF |
2325 |
275 |
2.08 |
695 |
||
|
PCI 15 CF LF |
3250 |
250 |
2.03 |
— |
61 |
|
|
PCI 15 CF FF |
2580 |
220 |
2.02 |
700 |
||
|
Aromatic Polyester (Polymer)-filled PTFE |
PCI 15 EK FF |
2400 |
245 |
1.99 |
730 |
— |
|
PCI 25 EK LF |
1700 |
190 |
1.88 |
— |
— |
|
|
Polymide (Polymer)-filled PTFE |
PCI 10 PI LF |
3250 |
250 |
2.02 |
— |
59 |
|
PCI 15 PI LF |
2580 |
235 |
1.95 |
— |
60 |
|
|
PCI 20 PI LF |
1450 |
140 |
1.88 |
— |
63 |
|
|
Bronze / Moly-filled PTFE |
PCI 40 BZ 5 M LF |
3000 |
165 |
3.12 |
— |
56 |
|
Glass / Graphite-filled PTFE |
PCI 15 FG 5 GR LF |
2700 |
240 |
2.18 |
— |
56 |
|
PCI 15 FG 5 GR FF |
2500 |
225 |
2.18 |
750 |
56 |
|
|
Glass / Moly-filled PTFE |
PCI 21 FG 2 M LF |
2700 |
225 |
2.25 |
— |
60 |
|
Proprietary |
PCI Bearing Comp 213 |
3400 |
270 |
2.22 |
350 |
63 |
