PTFE Film, also known as Polytetrafluoroethylene Film or Teflon® Film, is a versatile and high-performance material renowned for its exceptional chemical resistance, thermal stability, non-stick properties, and excellent dielectric characteristics. At Kaxite Sealing, we specialize in manufacturing premium-grade PTFE films engineered to meet the stringent demands of various industrial, electrical, and commercial applications. Our films are produced using advanced processing techniques to ensure uniformity, purity, and consistent performance, making them a reliable choice for engineers, designers, and procurement specialists worldwide.
**Key Properties and Advantages of Kaxite Sealing PTFE Film:**
* **Exceptional Chemical Resistance:** Inert to nearly all industrial chemicals and solvents, making it ideal for aggressive environments.
* **Wide Temperature Range:** Performs reliably from -200°C (-328°F) to +260°C (+500°F) continuously, with short-term tolerance up to 300°C (572°F).
* **Superb Dielectric Strength:** An excellent electrical insulator with high dielectric strength and a low dissipation factor across a wide frequency range.
* **Low Coefficient of Friction:** Possesses one of the lowest coefficients of friction of any solid material, providing outstanding non-stick and release properties.
* **Non-Flammability:** Inherently flame-resistant; meets UL 94 V-0 standards.
* **Excellent Weatherability and UV Resistance:** Unaffected by prolonged exposure to sunlight and weathering, ensuring long-term outdoor durability.
* **High Purity and FDA Compliance:** Certain grades are compliant with FDA regulations for food contact applications.
* **Zero Moisture Absorption:** Hydrophobic nature ensures dimensional stability and electrical properties are unaffected by humidity.
### **Detailed Product Parameters of Kaxite Sealing PTFE Films**
Our PTFE films are available in various forms, including skived films, cast films, and oriented films, each suited for specific applications. Below are the detailed technical specifications.
**Standard Physical & Mechanical Properties Table:**
| Property | Test Method | Unit | Typical Value Range |
| :--- | :--- | :--- | :--- |
| **Density** | ASTM D792 | g/cm³ | 2.14 - 2.20 |
| **Tensile Strength** | ASTM D882 | MPa (psi) | 20 - 40 (2900 - 5800) |
| **Elongation at Break** | ASTM D882 | % | 200 - 400 |
| **Tear Strength (Initial)** | ASTM D1004 | kN/m (pli) | 80 - 160 (450 - 900) |
| **Coefficient of Friction (Dynamic)** | ASTM D1894 | - | 0.05 - 0.10 |
| **Hardness (Shore D)** | ASTM D2240 | - | 50 - 65 |
**Thermal & Electrical Properties Table:**
| Property | Test Method | Unit | Typical Value |
| :--- | :--- | :--- | :--- |
| **Melting Point** | - | °C (°F) | 327 (621) |
| **Continuous Service Temperature** | - | °C (°F) | -200 to +260 (-328 to +500) |
| **Dielectric Strength** | ASTM D149 | kV/mm (V/mil) | 100 - 200 (2500 - 5000) |
| **Volume Resistivity** | ASTM D257 | Ω·cm | >10¹⁸ |
| **Dielectric Constant (1MHz)** | ASTM D150 | - | 2.0 - 2.1 |
| **Dissipation Factor (1MHz)** | ASTM D150 | - | <0.0002 |
**Standard Available Dimensions from Kaxite Sealing:**
* **Thickness:** Ranging from 0.025mm (0.001") to 3.0mm (0.118") for skived films; thinner gauges available for cast films.
* **Width:** Up to 1500mm (59") for skived films, depending on thickness.
* **Length:** Supplied in rolls or sheets as per customer requirements.
* **Color:** Standard is natural white (opaque). Custom colors (brown, black, etc.) are available upon request, often using heat-stable pigments.
### **Primary Applications of PTFE Film**
The unique combination of properties makes Kaxite Sealing PTFE film indispensable across numerous sectors:
* **Electrical & Electronics:** Insulation for wires, cables, capacitors, and printed circuit boards (PCBs). Slot liners and phase insulation in motors and transformers.
* **Industrial & Mechanical:** Gaskets, seals, and packings for chemical processing equipment. Release sheets for composite molding (prepreg, CFRP). Liners for chutes and hoppers to prevent material buildup.
* **Medical & Pharmaceutical:** Critical component in sterilizable packaging (Tyvek®-like lidding), membrane filters, and as a barrier layer in medical devices.
* **Food Processing:** Non-stick conveyor belts, release sheets for dough and candy, and liners for heat-sealing jaws.
* **Aerospace & Automotive:** High-temperature insulation, wire wrapping, and gasket material in engines and fuel systems.
### **Kaxite Sealing PTFE Film: Frequently Asked Questions (FAQ)**
**What is the main difference between skived PTFE film and cast PTFE film?**
Skived film is produced by shaving (skiving) a block of sintered PTFE on a lathe, resulting in a film with excellent mechanical strength, dimensional stability, and uniformity. It is ideal for gaskets, seals, and mechanical parts. Cast film is made from a PTFE dispersion poured onto a belt and sintered, yielding a very smooth, pin-hole free film that is excellent for electrical insulation and release liners where superior surface quality is critical.
**Can Kaxite Sealing PTFE film be used for outdoor applications?**
Yes, absolutely. PTFE film is inherently resistant to UV radiation, ozone, and weathering. It does not degrade or become brittle when exposed to sunlight and extreme temperatures, making it an excellent long-term solution for outdoor electrical insulation, architectural membranes, and solar panel components.
**Is your PTFE film FDA approved for food contact?**
Kaxite Sealing offers specific grades of PTFE film that are manufactured in compliance with FDA regulations (21 CFR 177.1550) for repeated food contact applications. It is crucial to specify this requirement when ordering to ensure you receive the correct, compliant material for your food processing or packaging application.
**How does PTFE film handle extreme temperatures compared to other plastics?**
PTFE film performs in a class of its own. While most engineering plastics have useful ranges between -40°C and 150°C, PTFE film retains its flexibility and properties from cryogenic temperatures (-200°C) up to a continuous +260°C. This makes it uniquely suitable for applications involving liquid nitrogen, aerospace, high-temperature cooking processes, or environments with rapid thermal cycling.
**Can PTFE film be heat sealed, laminated, or bonded to other materials?**
Pure PTFE film cannot be melted and sealed using conventional thermal methods due to its high melt viscosity. However, it can be effectively laminated to other substrates (fabrics, papers, other films) using specialized adhesives or fluoropolymer bonding layers. Kaxite Sealing can supply composite materials or provide guidance on successful bonding techniques for specific assembly processes.
**What are the key factors to consider when selecting a PTFE film thickness?**
The selection depends on the primary function: For electrical insulation, dielectric strength and voltage rating are paramount, dictating a minimum thickness. For gaskets and seals, compressibility, recovery, and sealing pressure guide thickness choice. For release liners, flexibility and conformability are key. Our technical team at Kaxite Sealing can assist in determining the optimal thickness based on your application's mechanical, thermal, and electrical requirements.
**Does Kaxite Sealing offer custom-sized or fabricated PTFE film parts?**
Yes, we provide extensive value-added services. Beyond supplying standard rolls and sheets, we offer precision slitting, die-cutting, stamping, and fabrication of custom parts like washers, seals, and complex gaskets. This allows customers to receive ready-to-install components, reducing in-house processing time and material waste.
**How should PTFE film be stored and handled to ensure longevity?**
Store rolls and sheets in a cool, dry place away from direct sunlight and heat sources. Keep the material in its original packaging until use to prevent contamination from dust or oils. While PTFE is tough, avoid creating sharp creases or folds in thin films, as this can initiate tearing. Use clean, sharp blades or dies for cutting.
