Polyvinyldene
Polyvinyldene (PVDF) [Kynar®]
Properties
- High-molecular weight crystalline thermoplastic polymer of vinylidene fluoride
- Corrosion-, impact-, ultraviolet light– and chemical-resistant
- Performs in many applications up to 300°F (149°C)
- Tough and durable
- Easily fabricated into finished parts
- PVDF stock shapes may be made from Kynar 740 resin, which complies with FDA regulation 21 CFR 177.2510, USDA, USP XX Class VI, 3A sanitary standards and meets ASTM D3222 resin specifications.
Common uses
- Tanks and process equipment
- Tank linings
- Pump and valve components
- Pipe flanges and spacers
- Components for wet-process stations
- Food trays for high-heat applications
Kynar
Material Specifications
| ASTM or UL test | Property | Value |
Physical |
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| D792 | Density (lb/in3)/(g/cm3) | 0.064 (1.77) |
| D570 | Water absorption, 24 hrs (%) | 0.03 |
Mechanical |
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| D638 | Tensile strength (psi) | 6,300 |
| D638 | Tensile modulus (psi) | 290,000 |
| D638 | Tensile elongation at break (%) | 50 |
| D790 | Flexural strength (psi) | 9,700 |
| D790 | Flexural modulus (psi) | 290,000 |
| D785 | Hardness, Shore D | 75 |
| D256 | Izod notched impact (ft-lb/in) | 3.0 |
Thermal |
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| D696 | Coefficient of linear thermal expansion (x 10–5 in./in./°F) |
6.6 |
| D648 | Heat deflection temp (F°/C°) at 264 psi | 230/110 |
| D3418 | Melting temp (F°/C°) | 332/166 |
| - | Max operating temp (F°/C°) | 275/130 |
| C177 | Thermal conductivity (BTU-in/ft²-hr-°F) |
1.2 |
| UL94 | Flammability rating | V-O |
Electrical |
||
| D150 | Dielectric constant at 1 MHz | 8.5 |
| D150 | Dissipation factor at 1 MHz | 0.05 |
| D150 | Dielectric strength (V/mil) | 1,700 |
| D257 | Volume resistivity (ohm/cm) at 50% RH | 1.5 x 1015 |
These are typical values for reference and comparison only. They should not be used as a basis for design specifications or quality control. Contact us for the manufacturers’ complete material property datasheets. All values were taken at 73°F (23°C) unless otherwise noted.
Don’t see what you’re looking for? Call us at 800–423-2769 or email us at tom@crownplasticsinc.com.
