Polyvinylidenefluoride (PVDF)
This is a relatively new
fluoropolymer and its best feature is chemical resistance. It has notably
higher chemical properties than PTFE but is less vulnerable to strain under
load.
Product strengths:
·
Higher chemical properties
than PTFE, e.g. tensile and compressive strength
·
Very good thermal
resistance at low and high temperatures up to 150°C
·
High UV resistance
·
Excellent dimensional
stability
·
Low flammability
·
Low friction coefficient
Product weakness:
·
Resistance to high
temperatures is lower than PTFE
·
Produces toxic fumes when
burned
Applications:
Mechanical: Due to low
coefficient of friction, it is ideal for bearings, even in water.
Electrical: Very good
dielectric properties; halogen free; self-extinguishing and weatherproof. It is
increasingly indispensable for electrical applications.
Chemical:
Excellent chemical resistance to acids and alkali typical of the fluoropolymers
and is particularly suited for petrochemical and chemical industries.
Food contact: It is physiologically
inert and approved for food contact by the majority of international standard
organizations and widely used for components in food machinery: pumps for
liquid food, etc.