PVDF Glass Filled Rods PVDF Glass Filled Rods PVDF Glass Filled Rods
Polyvinylidene fluoride, commonly known as PVDF, with the inclusion of glass fillers, stands as one of the most chemically resistant thermoplastics available globally. These remarkable rods can withstand extreme temperature ranges, from -30°C to +150°C. Their exceptional dimensional stability and robust tribological characteristics make them a top choice.
Glass-filled PVDF, being flame-retardant and self-extinguishing, boasts high density and remarkable strength. While it may exhibit reduced impact strength at low temperatures, its overall durability surpasses that of PTFE, despite a higher friction coefficient. What sets it apart from other fluoropolymers is its ability to combine mechanical, thermal, and electrical properties in the face of chemical exposure.
Like other fluoropolymers, glass-filled PVDF resists hydrolysis with minimal moisture absorption. Notably, PVDF rods can be welded using specialized welding rods, a feature not shared with PTFE.
Key Benefits of Glass-Filled PVDF Rods:
- Lightweight: These rods are remarkably light.
- Low Thermal Conductivity: They exhibit low thermal conductivity.
- High Chemical Corrosion Resistance: Glass-filled PVDF rods are highly resistant to chemical corrosion.
- Heat Resistance: They can withstand high temperatures.
- Mechanical Strength and Toughness: These rods are mechanically strong and tough.
- High Abrasion Resistance: Glass-filled PVDF has a high resistance to abrasion.
- Resistant to Most Chemicals and Solvents: They resist a wide range of chemicals and solvents.
- Low Permeability to Gases and Liquids: These rods have low permeability to gases and liquids.
- Stands Up to Harsh Thermal and Chemical Conditions: They perform well in harsh thermal and chemical environments.
- Unaffected by Long-Term UV Exposure: Glass-filled PVDF rods are unaffected by prolonged exposure to ultraviolet radiation.
Applications of Glass-Filled PVDF Rods:
Thanks to their excellent weldability, PVDF-coated fiberglass or polyester fabric is the preferred choice for manufacturing chemically resistant protective linings for tanks, pumping equipment, and valves in water treatment facilities and TPP (thermal power plant) stations. They are especially suitable for pumping abrasive or corrosive media.
Glass-filled PVDF is commonly used in various applications, including:
- Sealing Parts: Such as sealing rings, bushings, and laboratory glassware in the chemical industry.
- Electrical Parts: Including insulators, contact rails, plugs, connectors, and other electrical components.
- Anti-Friction Components: Like sliding bushings, gears, rollers, and screws that need to withstand aggressive chemical environments.
- Chemical Engineering: In the construction of pump bodies, valves, flow meters, fittings, and other components used in the chemical and petroleum industries.
Mechanical Properties
| Yield stress | DIN EN ISO 527 | MPa | >50 | |
| Elongation at break | DIN EN ISO 527 | % | >30 | |
| Tensile modulus of elasticity | DIN EN ISO 527 | MPa | >2100 | |
| Notched impact strength | DIN EN ISO 179 | kJ / m2 | >13 | |
| Shore hardness | DIN EN ISO 868 | scale D | >75 | |
Thermal Properties
| Melting temperature | ISO 11357-3 | °C | 172 … 175 | |
| Thermal conductivity | DIN 52612-1 | W / (m * K) | 0,19 | |
| Thermal capacity | DIN 52612 | kJ / (kg * K) | 1,20 | |
| Coefficient of linear thermal expansion | DIN 53752 | 10-6 / K | 100 … 140 | |
| Service temperature, long term | Average | °C | 0 … 140 | |
| Service temperature, short term (max.) | Average | °C | >145 | |
| Vicat softening temperature | DIN EN ISO 306, Vicat B | °C | 140 | |
Electrical Properties
| Dielectric constant | IEC 60250 | 8,0 | ||
| Dielectric dissipation factor (106 Hz) | IEC 60250 | 0,02 | ||
| Volume resistivity | DIN EN 62631-3-1 | Ω * cm | >1014 | |
| Surface resistivity | DIN EN 62631-3-2 | Ω | >1014 | |
| Comparative tracking index | IEC 60112 | 600 | ||
| Dielectric strength | IEC 60243 | kV / mm | 20 | |
Other Properties
| Density | DIN EN ISO 1183-1 | g / cm3 | >1,75 | |
| Water absorption | DIN EN ISO 62 | % | <0,4 | |
| Flammability (Thickness 3 mm / 6 mm) | UL 94 | V0 | ||
