ETFE Technical Specs
Electrical Properties |
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Dielectric constant @1MHz
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2,6
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Dielectric strength ( kV mm-1 )
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25
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Dissipation factor @ 1MHz
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0.0005
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Surface resistivity ( Ohm/sq )
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>1014
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Volume resistivity ( Ohmcm )
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1016
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Physical Properties |
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Water absorption ( % )
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0-0,03
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Density ( g cm-3 )
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1,7
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Refractive index
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1,403
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Limiting oxygen index ( % )
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30-32
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| Flammability |
V0
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| Radiation resistance |
Fair
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| Resistance to Ultra-violet |
Excellent
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Mechanical Properties |
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| Elongation at break ( % ) |
250-350
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| Hardness – Rockwell |
R50
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| Tensile modulus ( GPa ) |
0,8
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| Tensile strength ( MPa ) |
28-48
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| Izod impact strength ( J m-1 ) |
>1000
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Thermal Properties |
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| Specific heat ( J K-1 kg-1 ) |
1900-2000
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| Coefficient of thermal expansion ( x10-6 K-1 ) |
90-170
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| Thermal conductivity @23C ( W m-1 K-1 ) |
0,24
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| Upper working temperature ( C ) |
150-160
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| Lower working temperature ( C ) |
<-100
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| Heat-deflection temperature – 0.45MPa |
( C ) 105º
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| Heat-deflection temperature – 1.8MPa |
( C ) 70º
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Chemical Resistance |
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| Acids – concentrated |
Good
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| Acids – dilute |
Good
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| Alcohols |
Good
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| Alkalis |
Good
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| Aromatic hydrocarbons |
Good
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| Greases and Oils |
Good
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| Halogenated Hydrocarbons |
Good
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| Halogens |
Good
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| Ketones |
Good
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Properties for Ethylene-Tetrafluoroethylene Copolymer Film |
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Permeability to Water @38C
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x10-13 cm3. cm cm-2 s-1 Pa-1 |
170
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Permeability to Carbon Dioxide @25C
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x10-13 cm3. cm cm-2 s-1 Pa-1 |
3
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Permeability to Nitrogen @25C
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x10-13 cm3. cm cm-2 s-1 Pa-1 | 0,2 |
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Permeability to Oxygen @25C
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x10-13 cm3. cm cm-2 s-1 Pa-1 |
0,6
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