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TEFLON (PTFE) BALLS
Low weight fluorinated semicrystalline polymer balls, they provide exceptional corrosion resistance and are used into high temperature applications.
Mechanical and wear resistance properties are lower than other plastic materials. Good electric insulators, they are auto lubricant. Teflon properties change if they are exposed to electromagnetic radiations.
Applications
Ball bearings, special valves (very aggressive environments), measurement and medical instruments, appliances. They are used into foodstuff, paper, chemical, electronic, pharmaceutical industry.
Technical name | Commercial name | Abbreviation |
Polytetrafluoroethylene | Teflon | PTFE |
Physical / Mchanical / Thermal / Electric / Magnetic Properties
Property | Symbol | U.o.M. | Type | Notes | Value |
Density | δ | g/cm3 | Physical | Room temp. | 2.16 |
Young's modulus | E | GPa | Mechanical | - | 670 |
Friction coefficient | µ | - | Mechanical | Room temp. | 0.12 |
Water absorption | Aw | % | Physical | 24h | 0.02 |
Coefficient of linear thermal expansion | α | 10-6/ºC | Thermal | (ΔT=0-100°C) | 145 |
Thermal conductivity | λ | W/(m·K) | Thermal | Room temp. | 0.23 |
Electric resistivity | ρ | Ω*m*10-9 | Electric | - | > 1016 |
Relative magnetic permeability | µ | - | Magnetic | Diamagnetic | <1 |
Technical Data
Property | Type | U.o.M. | Values | U.o.M. | Values |
Hardness | Mechanical | Shore D | 50-65 | - | - |
Ultimate compressive strength | Mechanical | MPa | 7-30 | psi*103 | 1- 4 |
Service temperature | Thermal | ºC | -269/250 | ºF | -436/482 |
Range
Diameters | U.o.M. | Diameters | U.o.M. | Precision Grade |
2.381 - 355.600 | mm | 3/32 - 14 | inch | 0 - I - II - III |
Corrosion Resistance
Teflon balls provide exceptional corrosion resistance properties, they are resisting even in contact with industrial acids or caustic substances. They suffer
corrosive phenomena only against molten alkaline metals and fluorides at elevated temperatures.