Polyvinylidene fluoride (PVDF), commonly known by its brand name Kynar, is a high-performance thermoplastic known for its unique combination of mechanical strength, chemical resistance, and dimensional stability. It offers a higher tensile strength, pressure resistance, and dimensional stability compared to related polymers like PTFE. However, its friction and insulation properties are somewhat lower. Kynar has high mechanical strength and toughness at lower temperatures and is self-extinguishing, with a temperature range from -22 °F to +300 °F. It shows high resistance to chlorine, bromine, and high-energy radiation.
Properties of KYNAR (PVDF)
Kynar possesses several key properties that make it suitable for various industrial applications:
- High tensile strength: Kynar exhibits significant tensile strength, making it suitable for high-pressure applications.
- High mechanical strength: Kynar is known for its robustness and ability to withstand mechanical stress.
- High rigidity: Kynar retains its rigidity even at low temperatures, providing stability and structural support.
- High chemical resistance: Kynar resists a wide range of chemicals, including chlorine, bromine, and various acids and alkalis.
- Very low water absorption: Kynar absorbs minimal moisture, helping maintain its properties in humid environments.
- Good friction and wear and tear values: Kynar offers good wear resistance, suitable for applications with moving parts.
- Self-extinguishing: Kynar is inherently flame-resistant, enhancing safety in various applications.
- High UV-resistance: Kynar can withstand prolonged exposure to ultraviolet radiation, making it suitable for outdoor use.
- FDA compliant: Kynar is approved for use in food-related applications, meeting FDA standards.
- Excellent radiation resistance: Kynar is highly resistant to high-energy radiation, making it ideal for specialized applications.
- Excellent barrier properties: Kynar’s barrier properties help contain gases and liquids effectively.
- Relatively high coefficient of thermal expansion: Kynar has a higher coefficient of thermal expansion, which should be considered in certain applications.
- Welding is preferred joining method: Kynar can be welded for joining, providing strong and durable connections.
Applications of KYNAR (PVDF)
Due to its unique properties, Kynar is used in various industrial and engineering applications:
- Pumps: Kynar’s chemical resistance and high tensile strength make it suitable for pump components.
- Rotation discs: Kynar’s rigidity and wear resistance make it ideal for rotation discs in machinery.
- Valves: Kynar’s resistance to chemicals and high-energy radiation is beneficial for valves in harsh environments.
- Fittings: Kynar’s dimensional stability and chemical resistance make it suitable for fittings in various applications.
- Glide tracks: Kynar’s low friction and wear resistance make it ideal for glide tracks in mechanical systems.
- Cog wheels: Kynar’s mechanical strength and toughness at low temperatures make it ideal for cog wheels.
- Chemical processing: Kynar’s high chemical resistance is well-suited for use in chemical processing equipment and components.
Conclusion
KYNAR (PVDF) is a high-performance thermoplastic known for its high tensile strength, mechanical strength, chemical resistance, and dimensional stability. Its wide range of properties makes it suitable for various industrial and engineering applications, from pumps and valves to glide tracks and cog wheels. With its unique combination of durability, resistance, and versatility, Kynar is a valuable material for many demanding applications.