Polyvinyliden fluoride (PVDF)
Short description of material
A high crystalline, thermoplastic fluoropolymer with good mechanical, thermal and electrical properties as well as excellent chemical resistance. It has low density, good machinability and good dimensional stability in comparison to other fluoropolymers.
Application
- pump parts
- valve bodies and parts
- seals
- bearings
- fixtures and fixture parts
- construction parts in chemical equipment
Colors: natural (white to ivory, translucent)
| Material standard values | Method | Dry | Measure |
| Mechanical values | |||
| Density | ISO 1183 | 1.78 | g/cmᶾ |
| Yield stress | ISO 527 | 56 | Mpa |
| Elongation due to tearing | ISO 527 | 22 | % |
| Modulus of elasticity resulting from tensile test | ISO 527 | 2.000 | Mpa |
| Modulus of elasticity resulting from bending test | ISO 178 | 2.000 | Mpa |
| Flexural strenght | ISO 178 | 75 | Mpa |
| Impact strenght ₁ | ISO 179 | W.B. | KJ/m² |
| Notched-bar impact strength | ISO 179 | >15 | KJ/m² |
| Ball indentation hardness H358/30 | ISO 2039-1 | 120 | MPa |
| Creep rate stress at 1% alongation ₂ | DIN 53 444 | 3 | Mpa |
| Sliding friction coefficiet against steel ₃ | – | 0.3 | |
| Sliding wear against steel ₃ | – | – | μm/km |
| Thermal values | |||
| Melting temperature | ISO 3146 | 178 | °C |
| Thermal conductivity | DIN 52 612 | 0.19 | W/(K*m) |
| Specific thermal capacity | – | 0.96 | J/(g*K) |
| Coefficient of linear expansion ₄ | – | 13 | 10-5*K-1 |
| Operating temperature range (longterm) ₅ | – | – 40 / + 140 | °C |
| Operating temperature range (short-term) ₅ | – | 160 | °C |
| Fire behaviour | UL 94 | V-0 | – |
| Electrical values | |||
| Dielectric constant ₆ | IEC 250 | 8 | – |
| Dielectric loss factor ₆ | IEC 250 | 0.165 | – |
| Specific volume resistance | IEC 93 | 5×1014 | Ω*cm |
| Surface resistance | IEC 93 | 1013 | Ω |
| Dielectric strenght | IEC 243 | 25 | KV/mm |
| Creep current resistance | IEC 112 | CTI 600 | – |
| Miscellaneous data | |||
| Moisture absorption in normal climate until saturated | DIN 53 715 | <0,04 | % |
| Water absorption until saturated | ISO 62 | <0,04 | % |
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