Polyvinyl Fluoride - PVF

Polyvinyl fluoride is a semi-crystalline, colorless, transparent-translucent fluoropolymer comprising of good chemical resistance, exceptional weathering resistance and low permeability to gases; it has an extremely high tolerance of flexing and is very slow burning.

It is UV transparent, down to about 250 nm for the thinner films. However, it is extremely expensive and unfitting for injection molding since its melt decomposition rate is very fast.

Polymer Type

Thermoplastic

Advantages

Excellent resistance to weathering, staining and chemical attack (except ketones and esters).  Exhibits very slow burning and low permeability to vapour.

Disadvantages

Insufficient thermal stability to allow normal injection moulding.  Usually only available as a film.

Applications

Weather resistant film for glazing panels, surface covering for PVC film.  Film covering in aircraft interiors to reduce flammability, glazing for solar panels.

Normally, it is available as a film which is employed for exterior glazing, release film and surface protection.

Typical Properties

Property Value
Density (g/cm3) 1.45
Surface Hardness SD80
Tensile Strength (MPa) 40
Flexural Modulus (GPa) 1.4
Notched Izod (kJ/m) 0.18
Linear Expansion (/°C x 10-5) 9
Elongation at Break (%) 150
Strain at Yield (%) 30
Max. Operating Temp. (°C) 150
Water Absorption (%) 0.05
Oxygen Index (%) 35
Flammability UL94 V0
Volume Resistivity (log ohm.cm) 13
Dielectric Strength (MV/m) 20
Dissipation Factor 1 kHz 0.5
Dielectric Constant 1 kHz 8
HDT @ 0.45 MPa (°C) 121
HDT @ 1.80 MPa (°C) 82
Material. Drying hrs @ (°C) NA
Melting Temp. Range (°C) NA
Mould Shrinkage (%) NA
Mould Temp. Range (°C) NA

Source : Abstracted from Plascams

For more information on Plascams please visit RAPRA Technology Ltd.

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