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PTFE Film, also known as Polytetrafluoroethylene Film or Teflon® Film, is a versatile, high-performance material manufactured from pure PTFE resin. Known for its exceptional chemical resistance, wide operating temperature range, and outstanding non-stick properties, PTFE film is a critical component in demanding industrial, electrical, and manufacturing applications. At Kaxite Seals, we specialize in producing premium-grade PTFE films engineered to meet the most stringent requirements for durability, purity, and performance. This thin, yet incredibly robust, material serves as an essential barrier, insulator, and release layer across countless sectors.
The superiority of our PTFE film stems from the inherent properties of PTFE polymer and our precise manufacturing controls. Here are the core benefits:
Kaxite Seals offers a comprehensive range of PTFE films to suit various applications. Our standard and custom options are detailed below.
| Property | Test Method | Typical Value | Units |
|---|---|---|---|
| Density | ASTM D792 | 2.15 - 2.20 | g/cm³ |
| Tensile Strength | ASTM D638 | 20 - 35 | MPa |
| Elongation at Break | ASTM D638 | 250 - 400 | % |
| Dielectric Strength | ASTM D149 | > 100 | kV/mm |
| Coefficient of Friction (Dynamic) | ASTM D1894 | 0.05 - 0.10 | - |
| Continuous Service Temperature | - | -270 to +260 | °C |
| Water Absorption | ASTM D570 | < 0.01 | % |
| Grade | Description | Key Applications | Standard Thickness Range |
|---|---|---|---|
| Virgin PTFE Film | Pure, uncontaminated PTFE resin. Highest performance in chemical and electrical properties. | Electrical insulation, chemical linings, high-purity seals. | 0.025mm - 3.0mm |
| Filled PTFE Film | PTFE compounded with fillers like glass fiber, carbon, or bronze for enhanced mechanical properties. | Wear pads, bearing surfaces, gaskets requiring low creep. | 0.5mm - 5.0mm |
| Skived PTFE Film | Produced by skiving from a sintered billet. Excellent dimensional stability and strength. | Sheet gaskets, precision seals, protective covers. | 0.1mm - 10.0mm |
| Cast PTFE Film | Manufactured via a casting process. Very smooth surface, uniform thickness. | Release films, laminates, medical device components. | 0.01mm - 0.5mm |
| PTFE Coated Fabrics / Laminates | PTFE film laminated to fiberglass or other substrates for added strength. | Conveyor belts, architectural membranes, expansion joints. | Custom |
Q: What is the primary difference between PTFE film and PTFE sheet?
A: The distinction is primarily based on thickness. Material under approximately 0.5mm (0.020 inches) is generally referred to as film, while material above this thickness is termed sheet or tape. Films are often used for lining, insulation, and release applications where flexibility is key, while sheets are used for gaskets, spacers, and machined parts.
Q: Can Kaxite Seals PTFE film be heat sealed or welded?
A: Pure PTFE film cannot be heat sealed using conventional methods due to its non-stick nature and high melt viscosity. However, bonding is possible using specialized techniques such as thermal lamination with compatible adhesives, or using advanced processes like corona treatment followed by adhesive bonding. For assemblies, mechanical fastening is often the preferred method.
Q: How does PTFE film perform in outdoor applications?
A: PTFE film is exceptionally well-suited for outdoor use. It is completely resistant to UV degradation, moisture, and temperature extremes. This makes it an excellent choice for architectural applications (like tensile structures), protective covers for outdoor equipment, and long-term weathering barriers.
Q: Is PTFE film safe for use in food processing or medical devices?
A: Yes, but specific grades must be selected. Kaxite Seals offers USP Class VI compliant and FDA-compliant PTFE films that are suitable for food contact and certain medical applications. These grades are manufactured under strict controls to ensure purity and absence of contaminants. Always verify the specific certification for your intended application.
Q: What are the limitations of PTFE film?
A: While PTFE film has outstanding properties, it has some limitations to consider: it has relatively low mechanical strength compared to engineered plastics, can exhibit cold flow (creep) under sustained load, is not easily bonded, and can be penetrated by sharp objects. For structural applications, it is often laminated to a supportive substrate.
Q: How should PTFE film be stored and handled?
A: Store PTFE film in a cool, dry place away from direct sunlight. It should be kept flat or on a roll to prevent creasing. While chemically resistant, it is best to keep it clean from dust and debris. Standard workshop tools can be used for cutting (knives, shears, die cutters), but blades should be sharp to ensure clean edges.
Q: Can you produce custom-colored PTFE film?
A: Absolutely. While natural PTFE film is translucent white, Kaxite Seals can incorporate FDA-compliant pigments to produce films in standard or custom colors (black, gray, blue, etc.) for coding, aesthetic, or light-blocking purposes. This is a common request for applications in aerospace, electronics, and specialized industrial design.
Q: What industries most commonly use PTFE film from Kaxite Seals?
A: Our PTFE film serves a vast array of industries including: Chemical Processing (for gaskets, linings, and seals), Electrical & Electronics (as high-temperature wire insulation and capacitor film), Aerospace (for wire harness wraps and thermal barriers), Medical (for sterile packaging and device components), Packaging (as a non-stick release layer), and Industrial Manufacturing (for wear surfaces and low-friction guides).
The unique combination of properties makes PTFE film indispensable in numerous high-tech and industrial settings.
Kaxite Seals is committed to providing not just a product, but a material solution. Our technical team supports customers in selecting the correct grade, thickness, and form of PTFE film to optimize performance, longevity, and cost-efficiency for every unique challenge.
