PVDF, or Polyvinylidene Fluoride, is a high-performance thermoplastic fluoropolymer renowned for its exceptional chemical resistance, mechanical strength, and thermal stability. At Kaxite Sealing, we specialize in providing premium-grade PVDF materials and components engineered for the most demanding industrial applications. Our expertise ensures that when you specify Kaxite Sealing PVDF, you are selecting a product backed by decades of material science innovation and a commitment to quality.
Kaxite Sealing PVDF stands out in the polymer family due to its unique combination of properties, making it an ideal choice for critical sealing, lining, and structural components.
Kaxite Sealing offers PVDF in various forms, including rods, sheets, tubes, and custom-molded parts. Below are the detailed technical specifications for our standard PVDF grades.
| Property | Test Method | Unit | Value (Typical) |
|---|---|---|---|
| Density | ASTM D792 | g/cm³ | 1.78 |
| Tensile Strength (Yield) | ASTM D638 | MPa (psi) | 52 (7,500) |
| Elongation at Break | ASTM D638 | % | 20 - 50 |
| Flexural Modulus | ASTM D790 | MPa (psi) | 2,200 (320,000) |
| Impact Strength (Izod Notched) | ASTM D256 | J/m (ft-lb/in) | 130 (2.4) |
| Hardness (Rockwell) | ASTM D785 | Scale R | 110 |
| Property | Test Method | Unit | Value (Typical) |
|---|---|---|---|
| Melting Point | ASTM D3418 | °C (°F) | 171 (340) |
| Continuous Service Temperature (Max) | - | °C (°F) | 150 (302) |
| Thermal Conductivity | ASTM C177 | W/m·K | 0.19 |
| Coefficient of Linear Thermal Expansion | ASTM E831 | cm/cm/°C | 1.2 x 10⁻⁴ |
| Dielectric Strength | ASTM D149 | kV/mm | 67 |
| Volume Resistivity | ASTM D257 | Ω·cm | >10¹⁴ |
What are the primary industries that use PVDF from Kaxite Sealing?
Kaxite Sealing PVDF is critical in industries requiring high purity, chemical resistance, and durability. Key sectors include Chemical Processing (for pipes, valves, pumps, and tank linings), Semiconductor Manufacturing (for wet bench components, fluid handling), Pharmaceutical and Biotech (for filtration housings, tubing), Electrical and Electronics (for wire insulation, capacitor films), and Architectural Coatings (for long-lasting exterior finishes on buildings).
How does Kaxite Sealing PVDF compare to PTFE (Teflon) in terms of chemical resistance?
Both PVDF and PTFE offer excellent chemical resistance. PTFE generally has slightly broader resistance, particularly to very aggressive solvents and at higher temperatures. However, Kaxite Sealing PVDF offers superior mechanical strength, rigidity, and abrasion resistance while maintaining excellent resistance to most acids, bases, and halogens. PVDF is also easier to process using conventional melting techniques like injection molding and extrusion, often making it a more cost-effective and structurally sound choice for rigid components.
What are the temperature limits for continuous use of Kaxite Sealing PVDF?
Kaxite Sealing PVDF can be used continuously in temperatures ranging from -40°C (-40°F) to +150°C (302°F). Short-term exposure to higher temperatures, up to 170°C (338°F), may be possible depending on the mechanical load and chemical environment. Prolonged exposure above 150°C can lead to a gradual reduction in mechanical properties. For low-temperature applications, PVDF retains its toughness and impact resistance remarkably well.
Can Kaxite Sealing PVDF be welded or bonded effectively?
Yes, Kaxite Sealing PVDF components can be joined effectively. The most common method is hot gas or butt welding, which creates a strong, homogeneous joint. PVDF can also be bonded using specialized adhesives designed for fluoropolymers, though adhesive bonds are generally not as strong as welded seams. For optimal joint integrity in fluid systems, we recommend consulting with Kaxite Sealing's engineering team for specific joining procedure recommendations.
Is PVDF suitable for outdoor and UV-exposed applications?
Absolutely. PVDF is renowned for its exceptional weatherability and UV resistance. This is why it is a primary resin for high-quality architectural coatings (paints) on metal roofs and siding. Kaxite Sealing PVDF maintains its color stability, gloss, and mechanical properties after years of outdoor exposure, making it an excellent choice for external components, sensor housings, and structural parts in solar or environmental monitoring equipment.
What are the machining characteristics of PVDF stock shapes from Kaxite Sealing?
PVDF is considered an excellent material for machining. It is relatively soft compared to metals but stable and not overly gummy. Standard metalworking tools (lathes, mills, drills) with sharp, positive-rake angles and adequate cooling (air or water) can be used. Key recommendations are to avoid excessive clamping pressure to prevent deformation, use moderate speeds and feeds, and ensure proper chip evacuation to achieve a smooth surface finish.
Does Kaxite Sealing offer PVDF in FDA-compliant or USP Class VI grades?
Yes. Kaxite Sealing provides specific PVDF formulations that comply with FDA regulations 21 CFR 177.2510 for repeated use in contact with food. We also offer grades that meet United States Pharmacopeia (USP) Class VI standards for biocompatibility, which is essential for pharmaceutical processing and single-use bioprocess components. Certificates of Compliance are available upon request.
How should Kaxite Sealing PVDF components be stored and handled before installation?
PVDF is not hygroscopic, so prolonged moisture absorption is not a concern. However, components should be stored in a clean, dry environment away from direct sunlight and heat sources to prevent any potential dust contamination or thermal distortion. Avoid contact with sharp objects that could scratch the surface. Use clean, soft gloves during handling to prevent contamination from oils and salts on the skin, especially for high-purity applications.
