Polyvinylidene fluoride or polyvinylidene difluoride (PVDF) is a semi-crystalline thermoplastic fluoropolymer. It is readily melt-processible and can be fabricated into parts by injection and compression molding. It combines high mechanical strength with good processability. PVDF is commonly employed in chemical processing equipment such as pumps, valves, pipes, tubes and fittings. Its chemical formula is (C2H2F2)n. PVDF is a specialty plastic used in applications requiring the highest purity, as well as resistance to solvents, acids and hydrocarbons. PVDF has low density 1.78 g/cm3 in comparison to other fluoropolymers, like polytetrafluoroethylene.
It is available in the form of piping products, sheet, tubing, films, plate and an insulator for premium wire. It can be injected, molded or welded and is commonly used in the chemical, semiconductor, medical and defense industries, as well as in lithium-ion batteries. It is also available as a cross-linked closed-cell foam, used increasingly in aviation and aerospace applications, and as an exotic 3D printer filament. It can also be used in repeated contact with food products, as it is FDA-compliant and non-toxic below its degradation temperature.
In the recent years, there has been considerable interest expressed in the polymer Polyvinylidene Fluoride (PVDF). The interest it received because it exhibits strongest piezoelectric properties as compared to any other commercial polymer. The polymer is widely used in high tech applications such as chemical process equipment, electrical and electronics, specialty and energy related applications. But, what makes PVDF a high performance plastic in several sectors? Read on to know more.
PVDF (PVF2 or Polyvinylidene fluoride or polyvinylidene difluoride) is a semi-crystalline, high purity thermoplastic fluoropolymer. With service temperatures up to 150°C, PVDF displays good combination of properties such as:
- Exceptional chemical resistance
- High mechanical strength
- Piezoelectric and pyroelectric properties
- As well as good processability
Its highly desirable insolubility and electrical properties result from the polarity of alternating CH2 and CF2 groups on the polymer chain.
PVDF is readily melt-processible and can be fabricated into parts by injection and compression molding. As a result, it is commonly employed in chemical processing equipment such as pumps, valves, pipes, tubes and fittings; sensors and actuators etc.
It has many electronic applications, especially as jacketing materials for plenum-rated cable used in voice and video devices and alarm systems. The low flame spread and smoke generation of PVDF is a prime asset in these applications.
PVDF is gaining acceptance as a binder for cathodes and anodes in lithium-ion batteries, and as a battery separator in lithium-ion polymer systems.
Emerging applications of PVDF include fuel cell membranes, and components for aircraft interiors and office automation equipment
Thanks to its excellent combination of properties and processability, PVDF has become the largest volume of fluoropolymers after PTFE.
PVDF is available commercially in a wide range of melt flow rates and with various additives to enhance processing or end use properties.
Our plastic recycling machine could use the special screw and barrel to process and recycle the PVDF.The Screw we adopt the C267 alloy and the barrel adopts the Ni alloy. The recycling and pelletizing system will use the strand pelletizing to process the material.
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Aileen
Email: aileen.he@puruien.com
Mobile:0086 15602292676(whatsapp)
Post time: Mar-02-2023
