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PVDF and PVDF Copolymers

PVDF and PVDF: The Versatile and Viable Material Choice

| Author / Editor: Viral Vora / Dominik Stephan

Kynar PVDF made pollrings/laschings/tower packings
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Kynar PVDF made pollrings/laschings/tower packings (Picture: Arkema India)

The use of Kynar Polyvinylidene Fluoride (PVDF) is gaining traction across industries where chemicals are extensively used, thanks to the special attributes of this material that have proven its viability in various applications.

Since the construction of the first Kynar PVDF commercial plant at Calvert City, Kentucky, USA, in 1965, this product has been extensively used for various applications in the chemical industry. Initially, the applications for PVDF centered on the excellent chemical resistance to chlorine and chlorinated solvents, bromine, hot acids and several combinations of chemicals for waste handling. Users in these chemical arenas soon discovered other special properties of PVDF that were not universally associated with all plastics. It offered high abrasion resistance similar to ultra-high molecular weight (UHMW) polyethylene and nylon, and high tensile strength at elevated temperatures, which set it apart from commodity plastics and other fluoropolymers.

Moreover, PVDF exhibited the ability to withstand high doses of radiation in service – which made it superior to almost any known polymer – along with excellent flame resistance, superior sunlight resistance (UV) and overall weathering durability.

Plastic can be a High End Product

Simply put, PVDF is a high-end plastic and can serve as an ideal solution to equipment designers and engineers who prefer a thermoplastic material over metal components for chemical-related applications, but have not yet found a material that meets all their needs economically.

The advantages of PVDF or PVDF copolymers in various areas are listed here in an effort to make it easy to understand why and where these could be used in specific chemical handling applications.

Pulp and Paper Bleaching

The pulp and paper industry commonly utilizes chlorine-based technology for bleaching operations. Chlorine is very aggressive to metals and causes the equipment to rust and corrode quickly.

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