PTFE Film, or Polytetrafluoroethylene Film, stands as a pinnacle of engineered fluoropolymer materials, renowned for its exceptional chemical resistance, outstanding electrical insulation properties, and a remarkably low coefficient of friction. As a leading innovator in high-performance materials, Kaxite is dedicated to manufacturing premium-grade PTFE Film that meets the rigorous demands of industries ranging from aerospace and medical devices to electronics and industrial filtration. This versatile material serves as a critical component in applications where reliability under extreme conditions is non-negotiable.
The intrinsic properties of PTFE stem from its strong carbon-fluorine bonds, creating a material that is virtually inert. Kaxite leverages advanced manufacturing techniques to produce films that are uniform, consistent, and tailored for specific performance criteria. Our films exhibit superior performance across a wide temperature range, excellent dielectric strength, and non-stick characteristics, making them an indispensable solution for sealing, insulating, lining, and release applications.
Understanding the technical specifications is crucial for selecting the right film for your application. Below is a detailed breakdown of Kaxite PTFE Film's key parameters, presented for professional evaluation.
| Product Type | Thickness Range | Width Range | Key Features | Primary Applications |
|---|---|---|---|---|
| Skived Film | 0.025mm - 3.0mm (0.001" - 0.118") |
Up to 1500mm (59") |
High tensile strength, excellent dimensional stability, smooth surface. Made from compressed billets. | Gaskets, seals, diaphragms, insulating washers, mechanical components. |
| Cast Film | 0.0125mm - 0.5mm (0.0005" - 0.020") |
Up to 2000mm (78") |
Superior clarity, very uniform thickness, free of voids, excellent dielectric properties. | Capacitor dielectrics, flexible printed circuits (FPC), high-frequency insulation, release liners. |
| Adhesive-Backed Film | 0.05mm - 0.5mm (Film) + Adhesive Layer |
Up to 500mm (19.7") |
PTFE film laminated with PSA (e.g., acrylic, silicone) for easy application onto surfaces. | Non-stick surfaces on rollers, easy-clean linings, EMI/RFI shielding gaskets. |
| Porous / Expanded PTFE (ePTFE) Membrane | 0.01mm - 1.0mm | Up to 1500mm | Microporous structure, breathable, waterproof, chemically inert. High tensile strength. | Medical filters, venting membranes, air & liquid filtration, protective apparel. |
Q: What is the primary difference between skived and cast PTFE film?
A: The difference lies in the manufacturing process. Skived film is produced by precision-slicing (skiving) a cylindrical block of sintered PTFE, resulting in a film with high mechanical strength, ideal for gaskets and seals. Cast film is created by dispersing PTFE particles in a carrier, casting it onto a belt, and sintering. This yields a film with exceptional uniformity, clarity, and electrical properties, perfect for electronic applications.
Q: Can Kaxite PTFE Film be used for food contact or medical applications?
A: Yes, but specific grades must be selected. Kaxite offers USP Class VI and FDA-compliant grades of PTFE film that are suitable for food processing equipment and certain medical device applications. It is critical to consult with our technical team to ensure the selected film meets the exact regulatory and purity requirements of your application, including any necessary biocompatibility testing.
Q: How does PTFE film handle extreme temperatures compared to other plastics?
A: PTFE film's performance is exceptional. It maintains useful mechanical properties from cryogenic temperatures (-270°C) up to +260°C continuously, with short-term exposures to even higher temperatures possible. Most common engineering plastics, like polyethylene (PE) or polyvinyl chloride (PVC), have much lower maximum service temperatures (typically below 100°C) and become brittle at low temperatures. PTFE's stability is unmatched in this broad range.
Q: Is PTFE film safe? I've heard concerns about PFOA.
A: Modern, high-quality PTFE films from reputable manufacturers like Kaxite are produced without the use of PFOA (Perfluorooctanoic Acid) as a processing aid. The PTFE polymer itself is chemically inert, stable, and non-toxic. The safety concerns historically linked to PTFE involved overheating cookware coatings to extremely high temperatures (>360°C), causing pyrolysis fumes, which is not a risk in standard industrial applications within the specified temperature range.
Q: Can PTFE film be bonded, printed, or laminated?
A: Bonding virgin PTFE is challenging due to its non-stick nature. However, it can be achieved through specialized processes like sodium etching (napping) for chemical bonding, or using high-performance adhesives in laminated products (like our adhesive-backed films). Printing typically requires surface treatment (corona or plasma) to increase surface energy. Kaxite offers pre-treated films and can provide custom laminations with other materials (fabrics, foils, other polymers) to create composite structures.
Q: What are the key considerations for designing a gasket with PTFE film?
A: Important factors include: 1) Thickness: Choose based on flange conditions and required seal compression. 2) Stress Relaxation/Creep Resistance: Pure PTFE can cold flow. For bolted flanges, consider filled PTFE grades (offered by Kaxite) containing glass, graphite, or bronze to reduce creep. 3) Temperature & Chemical Media: Ensure compatibility. 4) Surface Finish: A smooth surface on the mating flange improves sealing. 5) Load: Ensure sufficient bolt load is applied to achieve an adequate seal, as PTFE is not an elastomer.
Q: How should Kaxite PTFE Film be stored and handled?
A: Store in a cool, dry place away from direct sunlight and heat sources. Keep the film roll or sheets lying flat on a smooth surface to prevent curling or distortion, especially for thin films. Use clean, gloves when handling to prevent contamination from oils and dirt on hands. For skived films, handle edges with care as they can be sharp. Always use sharp, clean blades for cutting or die-cutting.
