PTFE Film, a remarkable material derived from Polytetrafluoroethylene, stands as a cornerstone in advanced industrial sealing and insulation. Known colloquially as Teflon™ film (a registered trademark of Chemours), PTFE film offers an unparalleled combination of chemical resistance, thermal stability, and low friction. At Kaxite Sealing, we engineer our high-performance PTFE films to meet the most demanding applications across diverse sectors, from aerospace and semiconductor manufacturing to food processing and pharmaceutical production. Our commitment lies in providing not just a material, but a reliable sealing solution that enhances product longevity and operational safety.
The exceptional properties of PTFE film stem from its unique molecular structure, featuring strong carbon-fluorine bonds. This structure grants it a set of characteristics often considered unmatched by other polymeric films.
Our product range is meticulously categorized to serve specific functional requirements. Below are the detailed specifications for our standard and high-performance PTFE film lines.
| Product Grade | KX-PTFE-SK | KX-PTFE-HT | KX-PTFE-PM | KX-PTFE-EC |
|---|---|---|---|---|
| Primary Use | General Sealing & Gasketing | High-Temperature Environments | Pharmaceutical & Medical | Electrical & Cable Insulation |
| Thickness Range | 0.025mm - 3.0mm | 0.05mm - 2.0mm | 0.0125mm - 1.5mm | 0.025mm - 0.5mm |
| Standard Width | Up to 1500mm | Up to 1200mm | Up to 1000mm | Up to 1250mm |
| Density (g/cm³) | 2.15 - 2.20 | 2.15 - 2.18 | 2.16 - 2.20 | 2.17 - 2.22 |
| Tensile Strength (MPa) | ≥ 25 | ≥ 30 | ≥ 20 | ≥ 28 |
| Elongation at Break (%) | ≥ 250 | ≥ 200 | ≥ 300 | ≥ 150 |
| Continuous Use Temp. | -200°C to +260°C | -268°C to +300°C | -200°C to +260°C | -200°C to +260°C |
| Dielectric Strength (kV/mm) | ≥ 100 | ≥ 90 | ≥ 80 | ≥ 160 |
| Key Certification/Compliance | FDA, RoHS, REACH | UL 94V-0, MIL Specs | USP Class VI, ISO 10993 | UL 510, IEC 60684-2 |
What is the primary difference between PTFE film and other plastic films like polyethylene or polyester?
The core differences lie in performance under extreme conditions. While polyethylene and polyester (Mylar) films are cost-effective for general use, PTFE film is superior in extreme chemical resistance, continuous high-temperature operation (up to 260°C), and ultra-low friction. Polyester degrades in strong acids/bases and above 150°C, and polyethylene has poor temperature and solvent resistance. For critical sealing or insulation in harsh environments, PTFE film is the definitive choice.
Can Kaxite Sealing PTFE film be used for food contact applications?
Yes, absolutely. Our KX-PTFE-PM grade and specific formulations within our KX-PTFE-SK range are manufactured from 100% pure virgin PTFE resin, complying with FDA regulations 21 CFR 177.1550 for food contact. They are also certified USP Class VI for biocompatibility, making them suitable not only for food processing equipment (e.g., conveyor belts, release sheets) but also for primary packaging in certain applications.
How does PTFE film handle such a wide temperature range without degrading?
The thermal stability is inherent to its molecular structure. The strong carbon-fluorine bonds require a very high amount of energy to break. This allows the material to remain stable and retain its mechanical properties across a vast temperature spectrum, from deep cryogenic levels where materials become brittle, up to high heat where most plastics melt or oxidize. Kaxite Sealing's films are specially processed to minimize voids and stress points, ensuring consistent performance across this entire range.
Is PTFE film difficult to bond or laminate to other materials?
Yes, this is a common challenge due to its non-stick, low-surface-energy nature. Standard adhesives do not adhere well. For creating composites or sealed assemblies, specialized surface treatments are required. At Kaxite Sealing, we offer films with corona, sodium etch, or plasma treatment on one or both sides to promote adhesion. We also provide pre-fabricated laminates, such as PTFE film bonded to silicone rubber or fiberglass cloth, ready for easy integration into your design.
What are the key considerations when selecting a thickness for a gasket application?
Selecting the correct thickness is critical for sealing effectiveness and longevity. Key factors include: Flange Conditions: Thicker films (0.5mm-3.0mm) are better for uneven or damaged flange surfaces as they have higher creep resistance and can fill imperfections. Pressure: Higher system pressures generally require thicker films to resist extrusion through gaps. Bolt Load: Ensure the chosen thickness can achieve a proper seal with the available bolt torque; thinner films (0.1mm-0.5mm) require less load. Chemical Exposure: For highly aggressive chemicals, a marginal increase in thickness can extend service life. Our Kaxite Sealing technical team can provide detailed consultation based on your specific parameters.
Does Kaxite Sealing offer custom-sized or pre-fabricated parts?
Yes, we provide extensive customization services beyond standard rolls and sheets. We can precision-die-cut, slit, skive, or CNC-machine PTFE film into custom gaskets, seals, washers, shims, and intricate components per your technical drawings. This value-added service ensures a perfect fit, reduces on-site waste and fabrication time for our clients, and guarantees that the part performance aligns with the material's specifications.
