- Data Sheet: F1-59
Diflon E (containing PTFE, Glass Fibers and Molybdenum Bisulfide)
PTFE Special Compound preferred for parts and components requiring very good mechanical properties.
Description
This material offers an excellent combination of properties typical of the PTFE fluoropolymer resins:
• Service Temperature: offers excellent resistance to continuous service temperatures – working conditions from -100° C (-148°F) up to 250°C (482°F) and, for limited periods, even to higher temperatures; product’s low temperature resistance allows satisfactory performance down to -200°C (-328°F).
• Chemical resistance: offers high inertness towards nearly all known chemicals. Only attacked elemental alkali metals, chlorine trifluoride and elemental fluorine at high temperature and pressures might affect properties. Glass fibres is chemically inert with the exception of its reactivity with hydrofluoric acid and strong bases.
• Solvents resistance: offers insoluble properties in all solvents up to temperatures as high as 300° C (572° F). Certain highly fluorinated oils only swell and dissolve PTFE at temperatures close to the crystalline melting point.
• Secondary Filler: contains, in addition to glass fiber, a small amount of MoS2 which further increases hardness and wear resistance of PTFE and decreases friction.
PTFE Special Compound enhances some characteristics of virgin PTFE such as wear, compression strength, deformation under load, cold creep, thermal conductivity and dimensional stability.
• Service Temperature: offers excellent resistance to continuous service temperatures – working conditions from -100° C (-148°F) up to 250°C (482°F) and, for limited periods, even to higher temperatures; product’s low temperature resistance allows satisfactory performance down to -200°C (-328°F).
• Chemical resistance: offers high inertness towards nearly all known chemicals. Only attacked elemental alkali metals, chlorine trifluoride and elemental fluorine at high temperature and pressures might affect properties. Glass fibres is chemically inert with the exception of its reactivity with hydrofluoric acid and strong bases.
• Solvents resistance: offers insoluble properties in all solvents up to temperatures as high as 300° C (572° F). Certain highly fluorinated oils only swell and dissolve PTFE at temperatures close to the crystalline melting point.
• Secondary Filler: contains, in addition to glass fiber, a small amount of MoS2 which further increases hardness and wear resistance of PTFE and decreases friction.
PTFE Special Compound enhances some characteristics of virgin PTFE such as wear, compression strength, deformation under load, cold creep, thermal conductivity and dimensional stability.
Properties
• Improved thermal dimensional stability
• Excellent chemical stability
• Improved creep resistance
• Excellent electrical insulating properties
• Improved compression strength
• Reduced friction & wear; Low friction behaviour
• Exceptional temperature resistance
• Improved surface hardness
Main applications
Special Compound offers excellent properties in the chemical processing, in automotive industries, in sealing application and in mechanical applications in general for bushing, sliding pads, and for slide ways for machine tools.
High wear, abrasion resistance and good wear compression properties are suitable for the majority of dry bearing applications against hard countersurfaces.
Special Compound is commonly used filler for dynamic seal applications where both rotating and alternating movements are involved, pneumatic, hydraulic and mechanical parts, valve seats, gaskets, pneumatic, compressors, appliances, insulators hydraulic and mechanical parts
| Property | Method | Units | Specification | |
|---|---|---|---|---|
| Physical | Color | - | - | Blue - Grey |
| Specific gravity | ASTM D792 | g/cm3 | 2,250 – 2,300 | |
| Water absorption | ASTM D570 | % | 0,05 | |
| Flammability | UL 94 | V-0 | ||
| Mechanical | Tensile strength | ASTM D4745 | MPa | ≥ 20 |
| Elongation | ASTM D4745 | % | ≥ 220 | |
| Hardness | ASTM D2240 | Shore D | ≥ 58 | |
| Ball Hardness | ASTM D785 | MPa | ≥ 25 | |
| Deformation under load (140 Kg/cm2 for 24 hrs. At 23° C) |
ASTM D621 | % | 11-13 | |
| Permanent deformation (after 24 hrs. Relaxation at 23° C) |
ASTM D621 | % | 5,5-7,5 | |
| Coefficient of static friction | ASTM D1894 | 0,12-0,25 | ||
| Coefficient of dynamic friction | ASTM D1894 | 0,10-0,12 | ||
| Wear coefficient | - | cm3 min 10-8 Kg m h |
15-25 | |
| Thermal | Thermal conductivity | ASTM C177 | W/ m*K | 0,34 |
| Coefficient of linear thermal expansion From 25 to 100 °C |
ASTM D696 | 10-5/°C | 9-13 | |
| Electrical | Volume resistivity | ASTM D257 | Ohm*cm | 1015 |
| Surface resistivity | ASTM D257 | Ohm | 1014 | |
