What is PVDF?
PVDF, polyvinylidene fluoride, is a versatile fluoropolymer which is both strong and tough as reflected by its tensile properties and impact strengths. PVDF has excellent resistances to creep and fatigue. In thin sections, such as films, filament, and tubing, PVDF components are flexible and transparent. PVDF resin is produced by the Pennewalt and Soltex companies and sold under their respective tradenames of Kynar and Solef.
Where load bearing is important, PVDF fluoropolymers are rigid and resistant to creep under mechanical stress and load. Because PVDF is stable to sunlight, and other sources of ultraviolet radiation, it is widely used as base resins for long-lasting exterior coatings. An additional advantage over other fluoroplastics is that PVDF can be welded into tanks for acid and corrosive chemical processing in elevated temperature environments.Specifications
1. Mechanical strength and toughness
2. High abrasion resistance
3. High thermal stability
4. High dielectric strength
5. High purity
6. Readily melt processable
7. Resistance to most chemicals and solvents
8. Resistance to ultraviolet and nuclear radiation
9. Resistance to weathering
10. Resistance to fungi
1. High purity water
3. Acid applications
4. Nuclear waste processing
5. High temperature applications
6. Pressure applications
7. Solar glazing
|items||UNITS||ASTM TEST||PVDF HOMOPOLYMER|
|Tensile strength||psi||D-638||7, 800|
|Flexural modulus||psi||D-790||310, 000|
|Izod impact (notched)||ft-lbs/in of notch||D-256||3|
|Heat deflection temperature @ 264 psi||° F||D-648||235|
|Maximum continuous service temperature in air||° F|| ||-|
|Water absorption (immersion 24 hours)||%||D-570||0.02|
|Coefficient of linear thermal expansion||in/in/° Fx10 -5||D-696||7.1|
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