PTFE Film, also known as Polytetrafluoroethylene Film or Teflon® Film, is a high-performance material renowned for its exceptional chemical resistance, outstanding non-stick properties, and remarkable electrical insulation capabilities. As a leading specialist in advanced sealing and polymer solutions, Kaxite Sealing provides premium-grade PTFE films engineered for demanding applications across diverse industries. This versatile material serves as a critical component in sectors ranging from aerospace and medical devices to food processing and electronics, where reliability and performance under extreme conditions are non-negotiable.
The unique properties of PTFE film stem from its molecular structure, characterized by strong carbon-fluorine bonds. This structure grants it a combination of attributes rarely found in other materials, making it indispensable for modern engineering.
**Key Characteristics of PTFE Film:**
* **Exceptional Chemical Resistance:** Inert to nearly all industrial chemicals and solvents, making it ideal for corrosive environments.
* **Broad Temperature Range:** Maintains flexibility and performance from cryogenic temperatures as low as -200°C (-328°F) up to +260°C (+500°F) continuously.
* **Superb Dielectric Properties:** Excellent electrical insulator with a high dielectric strength, even in thin gauges.
* **Low Coefficient of Friction:** Possesses one of the lowest friction coefficients of any solid material, providing superior non-stick and release properties.
* **Non-Flammability:** Rated UL 94 V-0; will not support combustion.
* **Excellent Weatherability:** UV resistant and unaffected by prolonged outdoor exposure.
* **Biocompatibility:** Meets USP Class VI standards, suitable for medical and food contact applications.
### In-Depth Product Specifications of Kaxite Sealing PTFE Films
Kaxite Sealing manufactures PTFE films in various forms—skived, cast, or rolled—to meet specific application requirements. Our films are available in multiple grades, including filled compounds for enhanced mechanical properties.
#### **Standard PTFE Film Physical Properties Table**
| Property | Test Method | Typical Value | Units |
| :--- | :--- | :--- | :--- |
| **Density** | ASTM D792 | 2.15 - 2.20 | g/cm³ |
| **Tensile Strength** | ASTM D882 | 20 - 35 | MPa |
| **Elongation at Break** | ASTM D882 | 200 - 400 | % |
| **Dielectric Strength** | ASTM D149 | 100 - 200 (for 0.1mm thick) | kV/mm |
| **Volume Resistivity** | ASTM D257 | >10¹⁸ | ohm·cm |
| **Surface Resistivity** | ASTM D257 | >10¹⁶ | ohm |
| **Coefficient of Friction (Dynamic)** | ASTM D1894 | 0.05 - 0.10 | - |
| **Water Absorption** | ASTM D570 | <0.01 | % | | **Thermal Conductivity** | ASTM E1461 | 0.25 | W/(m·K) | | **Continuous Service Temperature** | - | -200 to +260 | °C | #### **Available Grades & Configurations from Kaxite Sealing** Kaxite Sealing offers a comprehensive portfolio to suit precise engineering needs. * **Pure Virgin PTFE Film:** Unfilled, highest purity for applications requiring maximum chemical resistance and dielectric properties. * **Glass-Filled PTFE Film:** Reinforced with glass fibers for improved creep resistance, wear resistance, and dimensional stability. * **Carbon-Filled PTFE Film:** Contains carbon for enhanced conductivity (electrical/thermal) and superior wear characteristics. * **Bronze-Filled PTFE Film:** Filled with bronze powder for exceptional wear resistance and high load-bearing capacity. * **Stainless Steel Filled PTFE Film:** Designed for applications requiring extreme wear resistance and thermal conductivity. * **Custom-Compounded Films:** We can develop films with specific filler types and percentages to meet unique application challenges. **Standard Thickness & Dimension List:** * **Thickness Range:** 0.025mm (0.001") to 3.0mm (0.118") standard. Custom thicknesses available upon request. * **Width Range:** Up to 1500mm (59") in roll form, depending on thickness. * **Roll Length:** Custom lengths to suit customer production processes. * **Form:** Available in rolls, sheets, or slit tapes. ### Critical Applications of PTFE Film The application spectrum for PTFE film is vast due to its unique property set. * **Electrical & Electronics:** Insulation for wires, cables, capacitors, and printed circuit boards (PCBs). Used as a dielectric material in high-frequency applications. * **Industrial Gasketing & Sealing:** As a gasket material for flanges, pumps, and valves handling aggressive chemicals. Serves as a skived tape for thread sealants. * **Medical & Pharmaceutical:** Used in sterilizable packaging, surgical device components, and as a barrier layer in medical products due to its biocompatibility. * **Food Processing:** Conveyor belts, release sheets, and liners for non-stick surfaces in baking and food packaging. * **Aerospace & Automotive:** Used in fuel systems, hydraulic systems, and as insulation for wiring harnesses exposed to high temperatures and fluids. * **Chemical Processing:** Linings for tanks, ducts, and as a protective layer against highly corrosive materials. ### Frequently Asked Questions (FAQ) About PTFE Film **Q: What is the difference between PTFE Film and FEP Film?** A: Both are fluoropolymers, but PTFE (Polytetrafluoroethylene) is not melt-processible and is typically skived or cast from a sintered billet. It has a higher continuous use temperature (260°C). FEP (Fluorinated Ethylene Propylene) is melt-processible, can be heat-sealed, and has a slightly lower continuous use temperature (205°C). PTFE generally offers slightly better chemical resistance and a lower coefficient of friction. **Q: Can PTFE film be used for outdoor applications?** A: Yes, PTFE film is highly resistant to UV radiation and weathering. It does not degrade or become brittle when exposed to sunlight, rain, or ozone, making it an excellent choice for long-term outdoor applications like architectural membranes or outdoor electrical insulation. **Q: Is PTFE film safe for food contact and medical use?** A: Yes, pure, virgin PTFE film is compliant with FDA regulations for food contact and meets USP Class VI standards for biocompatibility, making it suitable for medical devices and pharmaceutical packaging. Kaxite Sealing's medical-grade films are produced in controlled environments to ensure purity. **Q: How does filler material affect the properties of PTFE film?** A: Fillers like glass, carbon, or bronze are added to modify the base properties of pure PTFE. They significantly improve mechanical properties such as wear resistance, creep resistance (compression set), and hardness. Some fillers, like carbon, add conductivity. However, fillers can slightly reduce chemical resistance and dielectric properties compared to pure PTFE. **Q: What are the limitations of PTFE film?** A: While exceptionally versatile, PTFE film has some limitations. It has relatively low mechanical strength and stiffness compared to engineering plastics, which is why fillers are often used. It can be prone to creep under sustained load. It is also difficult to bond without specialized surface treatment (e.g., sodium etching or plasma treatment). Its high thermal expansion rate must be considered in designs with tight tolerances. **Q: How should PTFE film be stored and handled?** A: PTFE film should be stored in a cool, dry place away from direct sunlight and heat sources. Rolls should be stored on their ends to prevent flattening. Handle with clean gloves to avoid contamination from oils and dirt, which can affect performance in sensitive applications like electrical insulation. **Q: Can Kaxite Sealing provide custom-sized or fabricated PTFE film parts?** A: Absolutely. Kaxite Sealing specializes in providing value-added services. We can precision-slit films to specific widths, die-cut parts to complex shapes, and laminate PTFE film to other substrates like adhesives or fabrics to create composite materials tailored to your specific design requirements. **Q: What quality standards does Kaxite Sealing adhere to for its PTFE films?** A: Kaxite Sealing is committed to the highest quality standards. Our manufacturing processes are controlled under strict quality management systems. We provide certified test reports for key properties with each batch, ensuring traceability and consistency. Our materials can be supplied to meet industry-specific standards such as ASTM, MIL-SPEC, and UL requirements.
