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Polyvinylfluoride ( PVF )

Material Information

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Common Brand Names:
Tedlar
 
General Description:  

A semi-crystalline, colourless, transparent-translucent fluoropolymer with excellent weathering resistance, good chemical resistance and low permeability to gases; it is very slow burning and has a very high tolerance of flexing. It is UV transparent, down to say 250nm for the thinner films. However, it is very expensive and unsuitable for injection moulding because its melt decomposition rate is too fast.

Normally only available as film which is used for exterior glazing, release film and surface protection eg flammability reduction of aircraft interiors.
   

Electrical Properties

Dielectric constant @1kHz 8
Dielectric strength ( kV mm-1 ) 20
Dissipation factor @ 1kHz 0.04
Volume resistivity ( Ohmcm ) 1013

Mechanical Properties

Elongation at break ( % ) 90-250
Hardness - Rockwell D80 - Shore
Izod impact strength ( J m-1 ) 180
Poisson's ratio 0.4
Tear strength ( N mm-1 ) 130-200 (initial)
Tensile modulus ( GPa ) 2.1 - 2.6
Tensile strength ( MPa ) 55-110

Physical Properties

Density ( g cm-3 ) 1.37-1.39
Flammability V0
Limiting oxygen index ( % ) 35
Refractive index 1.46
Resistance to Ultra-violet Excellent
Water absorption - over 24 hours ( % ) 0.05

Thermal Properties

Coefficient of thermal expansion ( x10-6 K-1 ) 50-97
Heat-deflection temperature - 0.45MPa ( C ) 120
Heat-deflection temperature - 1.8MPa ( C ) 80
Lower working temperature ( C ) -70
Specific heat ( J K-1 kg-1 ) 1000 - 1800
Upper working temperature ( C ) 150 - 200

Properties for Polyvinylfluoride Film

Property Value
Permeability to Carbon Dioxide @25C x10-13 cm3. cm cm-2 s-1 Pa-1 0.07
Permeability to Hydrogen @25C x10-13 cm3. cm cm-2 s-1 Pa-1 0.3
Permeability to Nitrogen @25C x10-13 cm3. cm cm-2 s-1 Pa-1 0.001
Permeability to Oxygen @25C x10-13 cm3. cm cm-2 s-1 Pa-1 0.015
Permeability to Water @38C x10-13 cm3. cm cm-2 s-1 Pa-1 250
All information and technical data are given as a guide only. Although every effort has been made to ensure that the information is correct, no warranty is given as to its completeness or accuracy.

Buy Polyvinylfluoride on-line

Standard products are available in these forms
Film
Film

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