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Formula: PVDF
Form: Washer
Material: Polyvinylidene fluoride (PVDF)
CAS Number: 24937-79-9
Commodity: Polymers
PVDF Washer provides outstanding dimensional stability, chemical inertness, and dielectric strength, serving as a critical insulating and sealing component in advanced assemblies. Polyvinylidene fluoride imparts high resistance to acids, bases, and solvents while maintaining mechanical toughness and low water absorption. Industries such as aerospace, semiconductors, and pharmaceuticals use PVDF washers to isolate fasteners, prevent galvanic corrosion, and ensure sealing integrity in corrosive or high-purity environments. Specific uses include sealing interfaces in chemical processing systems, insulating spacers in electronic housings, and precision washers in biomedical equipment subject to sterilization. Research employs PVDF washers for testing electrical insulation performance, tribological behavior in chemically aggressive media, and integration into advanced sensor and actuator systems. Their circular geometry ensures uniform load distribution while maintaining chemical and dielectric resilience. This makes PVDF washers essential in both industrial reliability and the development of cutting-edge scientific devices.
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Tolerances

Washer
Size See item

Material Properties for Polymers

Chemical Resistance
Element Value
Acids - concentrated Good
Acids - dilute Good
Alcohols Good
Alkalis Fair
Aromatic hydrocarbons Good
Greases and Oils Good
Halogenated Hydrocarbons Good-Fair
Halogens Good-Poor
Mechanical Properties
Element Value
Coefficient of friction 0.2-0.4
Hardness - Rockwell R77-83
Poisson's ratio 0.34
Elongation at break( % ) 50
Tensile modulus( GPa ) 01-Mar
Izod impact strength( J m⁻¹ ) 120-320
Abrasive resistance - ASTM D1044( mg/1000 cycles ) 24
Tensile strength( MPa ) 25-60
Electrical Properties
Element Value
Dielectric constant @1MHz 8.4
Dissipation factor @ 1kHz 0.06
Dielectric strength( kV mm⁻¹ ) 13
Surface resistivity( Ohm/sq ) 10¹³
Volume resistivity( Ohmcm ) 10¹⁴
Physical Properties
Element Value
Flammability V0
Radiation resistance Fair
Refractive index 1.42
Resistance to Ultra-violet Excellent
Limiting oxygen index( % ) 44
Water absorption - over 24 hours( % ) 0.04
Density( gcm⁻³ ) 1.76
Thermal Properties
Element Value
Heat-deflection temperature - 0.45MPa( C ) 120-150
Heat-deflection temperature - 1.8MPa( C ) 80-115
Lower working temperature( C ) -40
Upper working temperature( C ) 135-150
Thermal conductivity( W m⁻¹ K⁻¹ ) 0.1-0.25@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 80-140

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