PTFE Film, also known as Polytetrafluoroethylene Film, is a high-performance engineering material celebrated for its exceptional chemical resistance, outstanding electrical insulation properties, and a remarkably low coefficient of friction. At Kaxite Sealing, we specialize in manufacturing premium-grade PTFE films tailored for demanding applications across diverse industries, from aerospace and electronics to chemical processing and medical devices. Our commitment to precision engineering ensures that every film we produce meets the highest standards of quality, consistency, and performance. Our PTFE films are engineered from 100% pure virgin PTFE resin, processed using advanced skiving or casting techniques. This results in a material with a unique combination of properties that are critical for solving complex engineering challenges. The inherent non-stick nature, coupled with a wide operational temperature range and excellent dielectric strength, makes it an indispensable component in modern manufacturing and design. **Key Characteristics of Kaxite Sealing PTFE Film:** * **Exceptional Chemical Resistance:** Inert to nearly all industrial chemicals and solvents. * **Superb Thermal Stability:** Performs reliably from -200°C to +260°C (-328°F to +500°F). * **Excellent Dielectric Properties:** High dielectric strength and low dielectric constant. * **Low Coefficient of Friction:** Provides self-lubricating, non-stick surfaces. * **High Purity & FDA Compliance:** Suitable for food, medical, and pharmaceutical applications. * **Non-Flammability:** Inherently flame-retardant, meeting stringent safety standards. * **Excellent Weathering Resistance:** Unaffected by UV exposure and outdoor conditions. * **Low Permeability:** Acts as an effective barrier against gases and vapors. ### **Detailed Product Specifications & Parameters** To ensure you select the perfect film for your application, Kaxite Sealing offers a comprehensive range of specifications. The following tables detail our standard product parameters. **Table 1: Standard Physical & Mechanical Properties** | Property | Test Method | Typical Value Range | Units | | :--- | :--- | :--- | :--- | | **Density** | ASTM D792 | 2.15 - 2.20 | g/cm³ | | **Tensile Strength** | ASTM D638 | 20 - 35 | MPa | | **Elongation at Break** | ASTM D638 | 200 - 400 | % | | **Tear Strength (Initiation)** | ASTM D1004 | 50 - 150 | kN/m | | **Coefficient of Friction (Dynamic)** | ASTM D1894 | 0.05 - 0.10 | -- | | **Hardness (Shore D)** | ASTM D2240 | 50 - 65 | -- | **Table 2: Thermal & Electrical Properties** | Property | Test Method | Typical Value Range | Units | | :--- | :--- | :--- | :--- | | **Continuous Service Temperature** | -- | -200 to +260 | °C | | **Melting Point** | -- | 327 | °C | | **Dielectric Strength** | ASTM D149 | 100 - 200 | kV/mm | | **Dielectric Constant (@1MHz)** | ASTM D150 | 2.0 - 2.1 | -- | | **Dissipation Factor (@1MHz)** | ASTM D150 | 0.0002 max | -- | | **Volume Resistivity** | ASTM D257 | >10^18 | Ω·cm | **Table 3: Standard Available Dimensions from Kaxite Sealing** | Thickness Range | Width Range | Standard Roll Length | Core Size | | :--- | :--- | :--- | :--- | | 0.025mm - 0.10mm (1 - 4 mil) | Up to 1500mm | 50 - 100 meters | 3" or 6" | | 0.10mm - 0.50mm (4 - 20 mil) | Up to 1200mm | 30 - 50 meters | 3" or 6" | | 0.50mm - 3.00mm (20 - 118 mil) | Up to 1000mm | Sheets or Custom Rolls | N/A | *Note: Custom dimensions, thicknesses, and tolerances are available upon request. Our engineering team at Kaxite Sealing can develop films to meet specific application-driven requirements.* ### **PTFE Film Manufacturing Processes at Kaxite Sealing** We utilize two primary methods to produce our high-quality films, each offering distinct advantages: 1. **Skived PTFE Film:** This process involves machining a thin, uniform layer from a solid, sintered cylindrical billet of PTFE. Skived films are known for their excellent dimensional stability, high tensile strength, and superior surface finish. They are ideal for precision gaskets, seals, and insulating components. 2. **Cast PTFE Film:** Produced by dispersing PTFE particles in a carrier fluid and casting it onto a moving belt, which is then dried and sintered. Cast films offer exceptional conformability, very low porosity, and excellent dielectric properties. They are preferred for applications like capacitor dielectrics, high-frequency circuit substrates, and release liners. ### **Frequently Asked Questions (FAQ) About PTFE Film** **What are the main advantages of using PTFE film over other plastic films?** PTFE film offers a unique set of properties unmatched by other polymers: extreme chemical inertness, a wider continuous temperature range, the lowest coefficient of friction, and superior dielectric properties. This combination makes it the material of choice for severe service conditions where other materials would fail. **Can Kaxite Sealing PTFE film be used for food contact applications?** Yes. Our PTFE films manufactured from 100% virgin PTFE resin are compliant with FDA regulations (21 CFR 177.1550) for food contact. They are inert, non-toxic, and will not contaminate food products, making them suitable for conveyor belts, release sheets, and packaging components. **How does PTFE film perform in outdoor or UV-exposed environments?** PTFE film has outstanding weathering resistance. It is virtually unaffected by prolonged exposure to ultraviolet (UV) light, ozone, and extreme temperatures. This makes it an excellent choice for architectural applications, solar panel components, and outdoor signage where long-term durability is critical. **What is the difference between skived and cast PTFE film?** Skived film is mechanically cut from a solid billet, resulting in a denser, stronger film with better dimensional stability, ideal for mechanical parts. Cast film is made from a dispersion, yielding a softer, more conformable film with very low porosity and excellent electrical properties, ideal for electronic applications. Kaxite Sealing experts can guide you to the correct type. **Is PTFE film electrically conductive?** No, standard PTFE film is an excellent electrical insulator with very high volume resistivity and dielectric strength. However, Kaxite Sealing can supply compounded versions filled with conductive materials (like carbon or metal powders) to create static-dissipative or conductive films for specialized applications. **How can PTFE film be fabricated or shaped for my application?** PTFE film can be easily die-cut, stamped, punched, laser-cut, or heat-sealed. For complex shapes, computer-controlled cutting is recommended. Kaxite Sealing offers value-added services, including precision slitting, die-cutting, and fabrication to your exact specifications, saving you time and production costs. **What are typical applications for PTFE film in the electronics industry?** In electronics, PTFE film is widely used as a dielectric insulator in high-frequency and high-voltage cables, flexible printed circuit boards (PCBs), capacitor films, coil insulation, and as a release layer in multilayer board lamination due to its stable electrical properties across a wide frequency range. **Does PTFE film have any limitations?** While extremely versatile, PTFE film has a relatively low wear resistance under high load and velocity (it can cold flow). It is also not suitable for applications involving molten alkali metals or certain fluorine compounds at high temperatures. For mechanical applications involving wear, Kaxite Sealing offers filled PTFE compounds with enhanced wear properties. **How should PTFE film be stored and handled?** Store rolls of PTFE film in a cool, dry place away from direct sunlight. Handle with clean gloves to prevent contamination from oils and dirt on hands. The film is chemically inert and stable, so no special atmospheric controls are needed for storage. **Can Kaxite Sealing provide custom-colored PTFE film?** Yes. While natural PTFE film is translucent white, we can incorporate FDA-compliant pigments to produce films in standard or custom colors for coding, branding, or aesthetic purposes in your final product.