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Bóng PTFE

PTFE Ball - PTFE Ball Latest Price, Manufacturers & Suppliers in China


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PTFE balls (polytetrafluoroethylene) - excellent resistance to corrosion

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.
PTFE 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
Molecular formula
Polytetrafluoroethylene
Teflon
PTFE
(CF2-CF2)n
Physical / mechanical / thermal / electric / magnetic properties
Property
Symbol
U.o.M.
Type
Notes
Values
Density
δ
[g/cm3]
Physical
Room temp.
2.16
Young's modulus
E
[MPa]
Mechanical
-
670
Friction coefficient
µ
-
Mechanical
Room temp.
0.12
Water absorption
Aw
%
Physical
24 h
0.02
Coefficient of linear thermal expansion
α
[10^-6/ºC]
Thermal
(ΔT=0-100°C)
145.0
Thermal conductivity
λ
[W/(m·K)]
Thermal
Room temp.
0.23
Volume resistivity
ρ
[Ω*m]
Electric
-
> 10^16
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
-
-
Compressive yield strength
Mechanical
[MPa]
7 - 30
[psix10^3]
1 - 4
Service temperature
Thermal
[ºC]
-269 / 250
[ºF]
-436 / 482
Range
Diameters (min/max)
U.o.M.
Diameters (min/max)
U.o.M.
Precision Grade
1.500 - 160.000
[mm]
1/16 - 6.5/16
["]
0 - I - II - III - IV

PTFE 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.


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