PVDF

PVDF (Polyvinylidene Fluoride) is a fluoropolymer with a good but limited chemical resistance but is tough and hard wearing. Compared to other fluoropolymers, it has an easier melt process because of its relatively low melting point of around 177°C.

It has a low density (1.78) and low cost compared to the other fluoropolymers. In sheet form it is extensively used as a lining material into steel or GRP vessels and tanks.

  • Good resistance to acids and solvents.
  • Operating temperature up to 150°C
  • Low smoke generation during a fire.
  • Non porous.
  • Tough and hardwearing

Trade Names for PVDF resins include Arkema Kynar™, Dyneon™,

Property Value Units Method
Mechanical Properties
Tensile Strength, 23°C, at break 5075-7250
35-50
psi
MPa
D 638
Elongation at break, 23°C 20-50 % D 638
Flexural Strength, 23°C 2100
11165
psi
MPa
D 790
Impact Strength, Izod, 23 °C, notched, 4mm thick 2.25
120
Ft-lbf/in
J/m
D 256
Yield Strength st 23°C 7685-8265
53-57
psi
MPa
D 638
Density 1.78 gm/cu.cm
Coefficient of friction, static 0.2-0.4 D 1894
Thermal Properties
Coefficient of Linear Expansion 12–14 x 10-5 K-1 D 696
Melting Point 173 °C D 3418
Thermal Conductivity 1.39
0.2
Btu/hr-.ft-deg F
watt/meter-K
ASTM C 177
Specific Heat, at 300 deg K 0.287–0.382
1.2–1.6
Btu/lb/deg F
kJ/Kg/deg K
Heat Distortion Temperature, 66 lb/sq.in (0.455 MPa), 4 mm thick 145 °C D 648
Service Temperature to 150 °C
Processing Temperature 180 °C
Electrical Properties
Surface Arc-Resistance sec D 495
Volume Resistivity >1014 ohm-cm D 257/DIN
53483
Surface Resistivity, @ 100% RH >1014 Ohm sq-1 D 257/DIN
53483
1MHz, 23°C 7 ε D150-81
Other Properties
Flame Rating+ V-0 Class UL-94
Refractive Index 1.41–1.42 nD25 D 542
Limiting Oxygen Index 44 % Oxygen D 2863
Water Absorption, 230 °C, 10Kg < 0.04 gm/10 min D 1238
Specific Gravity 1.78 ISO 1183