Polychlorotrifluoroethylene, commonly known as PCTFE, is a high-performance fluoropolymer renowned for its exceptional combination of properties. A PCTFE sheet is a semi-finished product manufactured from this unique material, available in various thicknesses and dimensions to suit a wide range of industrial applications. Unlike more common fluoropolymers like PTFE, PCTFE offers superior barrier properties, excellent dimensional stability, and high rigidity, making it the material of choice for the most demanding sealing and containment challenges. For over two decades, Kaxite Sealing has been at the forefront of engineering and supplying premium-grade PCTFE sheets, leveraging deep material science expertise to deliver reliability where it matters most.
The selection of a PCTFE sheet is driven by its unparalleled set of characteristics. These sheets provide solutions where other plastics, metals, or elastomers fall short.
Kaxite Sealing manufactures PCTFE sheets to the highest purity and consistency standards. Our sheets are produced from 100% virgin PCTFE polymer, ensuring optimal performance and traceability.
| Property | Test Method | Typical Value | Units |
|---|---|---|---|
| Density | ASTM D792 | 2.10 - 2.15 | g/cm³ |
| Tensile Strength (Yield) | ASTM D638 | 5,000 - 6,000 | psi |
| Elongation at Break | ASTM D638 | 80 - 250 | % |
| Compressive Strength (10% Deformation) | ASTM D695 | 12,000 | psi |
| Flexural Modulus | ASTM D790 | 250,000 | psi |
| Coefficient of Linear Thermal Expansion | ASTM D696 | 4.5 x 10-5 | in/in/°F |
| Continuous Service Temperature | - | -240 to +199 | °C |
| Water Vapor Transmission Rate | ASTM E96 | < 0.02 | g·mm/m²·day |
| Dielectric Strength | ASTM D149 | 500 - 600 | V/mil |
| Thickness (Inches) | Thickness (mm) | Standard Sheet Size (Inches) | Standard Sheet Size (mm) |
|---|---|---|---|
| 0.0625" (1/16") | 1.59 mm | 12" x 12", 24" x 24" | 305 x 305 mm, 610 x 610 mm |
| 0.125" (1/8") | 3.18 mm | 12" x 12", 24" x 24" | 305 x 305 mm, 610 x 610 mm |
| 0.25" (1/4") | 6.35 mm | 12" x 12", 24" x 24" | 305 x 305 mm, 610 x 610 mm |
| 0.5" (1/2") | 12.7 mm | 12" x 12" | 305 x 305 mm |
| 0.75" (3/4") | 19.05 mm | 12" x 12" | 305 x 305 mm |
| 1.0" | 25.4 mm | 12" x 12" | 305 x 305 mm |
Note: Custom sizes, thicknesses, and fabricated parts are available upon request. Contact Kaxite Sealing engineering for specific requirements.
Kaxite Sealing PCTFE sheets are deployed across critical industries due to their reliability and performance.
What is the main difference between PCTFE and PTFE sheets?
While both are fluoropolymers, PCTFE and PTFE have distinct differences. PCTFE is a harder, more rigid, and creep-resistant material with vastly superior gas and moisture barrier properties. PTFE is softer, has a lower coefficient of friction, and can handle slightly higher temperatures, but it is more permeable and prone to cold flow. PCTFE is often selected for dimensional stability and impermeability, while PTFE is chosen for its non-stick and low-friction properties.
Can Kaxite Sealing PCTFE sheets be machined into custom parts?
Yes, absolutely. Kaxite Sealing PCTFE sheets are specifically formulated and processed to exhibit excellent machinability. They can be precision machined using standard metalworking tools (lathes, mills, drills) into complex components like custom gaskets, seals, bushings, insulators, and valve parts. We offer comprehensive fabrication services or supply sheet stock for in-house machining.
How does PCTFE perform in high-pressure applications?
PCTFE performs exceptionally well under high pressure due to its high compressive strength and low creep. Unlike softer polymers that extrude or deform permanently, a PCTFE sheet or gasket will maintain its sealing force and geometry, preventing system failure. It is a preferred material for static seals in high-pressure hydraulic and chemical systems.
Is PCTFDA safe for use in food, medical, or pharmaceutical contact applications?
PCTFE is biocompatible and meets relevant regulatory standards for purity. Specific grades can be certified for use in applications requiring USP Class VI, FDA CFR 21 compliance, or EU 10/2011 regulation for food contact. Kaxite Sealing provides full material traceability and certification documentation to support validation processes in regulated industries.
What are the limitations of PCTFE sheets?
The primary limitations of PCTFE are its cost, which is higher than many other engineering plastics, and its upper continuous temperature limit of around 199°C (390°F), which is lower than some other high-performance polymers like PEEK. It is also attacked by molten alkali metals and certain fluorine-containing compounds at high temperatures. A Kaxite Sealing engineer can help assess suitability for your specific chemical environment.
How should PCTFE sheets be stored and handled?
Kaxite Sealing PCTFE sheets should be stored in a cool, dry place away from direct sunlight and heat sources. They are robust but should be handled to avoid deep scratches or gouges on sealing surfaces. Standard shop safety practices apply when machining; it is recommended to use sharp tools and proper dust extraction as machining generates fine chips.
Does Kaxite Sealing offer PCTFE in forms other than sheets?
Yes. In addition to standard and custom-sized sheets, Kaxite Sealing supplies PCTFE in rods, tubes, and film. We also manufacture finished components, including standard AS568 O-rings, custom molded seals, and precision-machined parts to print specifications.
