| Chemical Designation |
Polytetrafluoroethylene
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| DIN Abbreviation |
PTFE
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| Colour, Filler |
opaque
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| Stock Availabilty | ||||
| Main Characteristics | ||||
| Preferred Fields | ||||
| Applications | ||||
| MECHANICAL | ||||
| Properties |
Unit
|
Test method
DIN ASTM |
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| Density |
g/cm3
|
53 479
|
2.18
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| Tensile strength/ yield |
MPa
|
53 455
|
25
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| Tensile strength/ break |
MPa
|
53 455
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| Elongation / break |
%
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53 455
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500
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| Modules of elasticity/tension |
MPa
|
53 457
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700
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| Modules of elasticity/flexure |
MPa
|
53 457
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| Ball indentation hardness |
MPa
|
53 456
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30
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| Impact strength (charpy) |
kJ/m2
|
53 453
|
no br.
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| Creep rupture strength /1000 hrs static load |
MPa
|
5
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| Time yield 1% elongation/1000hrs |
MPa
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1.5
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| Coefficient of friction/ hardened & ground steel |
-
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0.08 to 0.1
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| Wear/ as above |
mm/km
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2.1
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| THERMAL | ||||
| Properties |
Unit
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Test method
DIN ASTM |
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| Crystaline melting point |
ºC
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53 736
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327
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| Glass transition temperature |
ºC
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53 736
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-20
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| Heat distortion temperature | Method A |
ºC
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ISO 75
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| Method B |
ºC
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ISO 75
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121
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| Field33 | ||||
| Maximum service temperature | short term |
ºC
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260
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| long term |
ºC
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260
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| Coefficient of thermal conductivity |
W/(m.K)
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0.25
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| Specific heat |
J(g.K)
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1
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| Coefficient of thermal expansion |
10-5/K
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12
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| ELECTRICAL | ||||
| Properties |
Unit
|
Test method
DIN ASTM |
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| Dielectric constant at 105 HZ |
53 483
|
2.1
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| Dielectric loss factor 105 HZ |
S.cm
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53 483
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0.0002
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| Specific volume resistance |
S
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53 482
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1.00E+15
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| Surface resistance |
53 482
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| Dielectric strength 1 mm |
KV/mm
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53 481
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48
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| Tracking resistance |
53 480
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KA 3c/KB>:600
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| MISCELLANEOUS | ||||
| Properties |
Unit
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Test method
DIN ASTM |
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| Moisture absorption |
%
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53 714 |
0
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| Water absorption at saturation at 23 §C |
%
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53 495 | ||
| Resistance to hot water, washing soda |
resistant
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| Flammibilty | UL 94 |
VO
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| Resistance to weathering |
resistant,
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| Compliance | ||||