PVDF and PVDF Copolymers
PVDF and PVDF: The Versatile and Viable Material Choice
The combination of chemical resistance, high purity and superior strength of PVDF compared to other high-quality materials has made it a standard material of construction in a semiconductor facility.
The nuclear reclamation industry faces several challenges. First, a series of harsh chemicals is used in the glove boxes manufactured to purify the radioactive ores. While many materials can handle chemicals like hydrochloric or nitric acid used to purify plutonium and uranium, the contact surfaces of the glove box must also handle the radioactivity associated with this process. After several years of testing and field experience, PVDF has been found to be the most radiation resistant polymer capable of long life in nuclear glove box design and waste holding equipment.
Potable Water and Wastewater
Certain grades of PVDF are listed by the National Sanitation Foundation (NSF) for use in potable water systems. Taking into account the concerns related to bacteria, bioterrorism, chlorine content of water and UV exposure for many years of service life, a material like PVDF can provide long system life even if the system parameters change over time.
In wastewater applications, there is a general concern that chemical compatibility could be unpredictable. PVDF offers an improved safety factor, should unexpected or unplanned chemical combinations occur. It is unlikely that any combination of chemicals at 140°C or below over a short period would attack PVDF in a catastrophic manner, which is more likely with metals or lower performing polymers.
Food, Dairy and Beverage
In general, food items such as sauces and fruits can have pH ranges between 2.0 and 3.5. When it comes to their processing, this can result in an aggressive environment over time. PVDF components are often machined and used in the processing of cranberry, hot sauces, alcoholic beverages and a few other relatively common foods. The abrasion resistance of PVDF and its ability to be sterilized with various chemicals and steam also adds to the attractiveness of this material for food, dairy and beverage applications.