PVDF
The Everlasting King of
Fluorine
PVDF is a highly crystalline fluoropolymer with a fluorine content of up to 59%,
making it a star material within the fluoroplastics family.
30+ Years
Weatherability
Smart
Piezoelectric
Green
Future
Core Material Advantages
30 Years of Durability
Superior UV resistance and weatherability for outdoor applications.
Chemically
Inert
Inert to most acids, bases, and organic solvents.
Self-Extinguishing
High flame retardancy with UL94 V-0 certification without additives.
Smart Piezoelectric
Unique piezoelectric properties for sensing and energy harvesting.
High Purity &
Low Extractables
Ultra-low extractables for semiconductor and UPW systems.
PVDF Properties and Key Characteristics
| Performance Dimension | Ultimate Performance |
|---|---|
| Density | 1.76–1.78 g/cm³ |
| Tensile Strength | 40–55 MPa |
| Elongation at Break | 50–300% (Depends on crystallinity) |
| Temperature Resistance | Continuous -40°C to 150°C (Short-term up to 160°C) |
| Weather Resistance | >30 years without fading or chalking (Fluorocarbon bond) |
| Chemical Resistance | Resistant to strong acids (HCl, H₂SO₄), bases, halogens, and solvents |
| Flame Retardancy | UL94 V-0 (Self-extinguishing, LOI 43%) |
| Piezoelectricity | d₃₃ coefficient 20–30 pC/N (Second only to PZT) |
| Dielectric Constant | 8–10 (Stable at high frequencies) |
| Water Absorption | <0.04% |
| Pros | Cons |
|---|---|
| 30+ Years Weatherability (No yellowing) | High processing temp (230–270°C) |
| Resistant to almost all chemicals | High cost (1/3 of PTFE) |
| Self-extinguishing (V-0) | Poor adhesion (Requires corona treatment) |
| Piezoelectric + Ferroelectric | Large crystalline shrinkage (Requires annealing) |
| High purity & Low leaching (ppb level) | Not resistant to molten alkalis / fuming sulfuric acid |
| Selection Scenario | Core Value |
|---|---|
| Architectural Facades | 30 Years No Fading |
| Lithium Batteries | Safety + Long Life |
| Chemical Anti-corrosion | Unrivaled Chemical Resistance |
| High-Purity Water Systems | ppb-Level Purity |
| Piezoelectric Sensing | Intelligent Response |
| Summary: "PVDF is the most 'long-lived' and 'intelligent' material among fluoroplastics!" | |
| Common Processing Method | Typical Products |
|---|---|
| Extrusion | Pipes, Sheets, Cable Jackets |
| Injection Molding | Valves, Pump Bodies, Fittings |
| Casting/Stretching | Piezoelectric Films, Battery Separators |
| Coating (Powder/Liquid) | Fluorocarbon Architectural Coatings |
| 3D Printing (FDM) | Prototypes (Kynar® Filament) |
| Popular Modification | Modification Effect |
| PVDF-HFP Copolymerization | Enhanced flexibility & piezoelectricity; Battery grade |
| Nano-fillers (BaTiO₃) | Piezoelectric coefficient increased by 50% |
| Anti-UV Coating | Extended outdoor service life |
| Conductive Carbon Black | Anti-static (<10⁶Ω) |
| Kynar Flex® | Enhanced low-temperature toughness |
Industry Applications
Architectural Coatings (Kynar 500)
The iconic Daxing Airport relies on our PVDF coatings for long-term
color integrity under extreme environmental stress.
Lithium Battery Binders
The invisible backbone of energy storage. Trusted by CATL and Tesla for high-performance electrode adhesion.
Chemical Processing
Industrial pipes and valves with unmatched corrosion resistance for aggressive chemicals.
Semiconductor & UPW
Membranes and ultrapure water systems requiring zero leachables and high sterilization resistance.
Piezoelectric Sensors
Smart skin and ultrasonic transducers utilizing the exceptional ferroelectric properties of PVDF films.
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