| All data is for information only------(Home) | |
|---|---|
| PRODUCT DATA of PTFE |
| Material | PTFE |
| Safety Datasheet | Teflon Advanced MSDS |
| Product Type | Thermoplastic. |
| Chemical Composition | Polytetrafluoroethylene. |
| Name of Manufacturer | Several (DuPont USA, Hoechst D, Montecatini I, etc.) |
| EXPERIENCE IN PRACTICE |
|---|
| Development Status | Commercial Product |
| Cost Range | Medium |
| Lot Reproducibility | Excellent |
| Equivalent Designations | Teflon, Halon, Fluon, Hostaflon |
| Space Experience | Excellent |
| PHYSICAL PROPERTIES |
|---|
| Specific Gravity | 2.15 |
| ELASTIC PROPERTIES |
|---|
| Tensile Modulus | 0.42 GPa |
| ELECTRICAL PROPERTIES |
|---|
| Electrical Volume Resistivity | 1e16 ohm.m(minimum) |
| Dielectric Constant | 2.1 Remark:60 Hz |
| Dielectric Strength | 18.9 kV/mm |
| Dissipation Factor | 0.0002 Remark:60 Hz |
| THERMAL PROPERTIES |
|---|
| Thermal Conductivity | 0.25 W/m.K |
| Thermal Expansion Coefficient | 100 μstrain/°C |
| Specific Heat | 1 J/g.K Remark:40°C approx. |
| RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY |
|---|
| Flammability | Pass (30% O2) Test:NASA NHB 8060-1B |
| Toxicity/Offgassing | Pass Test:NASA NHB 8060-1A |
| Temperature Range(space) | Cryogenic to +260°C Test:Long term |
| Outgassing(Avg data) | TML = 0.05%, RML = 0.02%, CVCM = 0.0% Test:ECSS-Q-70-02 |
| Oxygen Index | 95 Test:ECSS-Q-70-21 |
| Ionising Radiation | 0.1 Mrad Test:Threshold damage under vacuum. |
| SPECIAL RECOMMENDATIONS |
|---|
| Special Recommendations | PTFE has a strong tendency to creep and is unable to sustain constant high load. Creep may occur during thermal cycling. · All PTFE-insulated wires and cables tested up to now have been found acceptable for space use. · PTFE is rather sensitive to radiation and its use outside a spacecraft, particularly in high-radiation zones (Van Allen belts, geostationary orbit) requires special testing. · Volume change associated with a change of crystallinity occurs between approx. 22 to 27°C. |