When industrial sealing applications demand long-term reliability under high temperatures and aggressive chemical exposure, silica PTFE sealing sheet provides a proven solution. This PTFE gasket sheet with silica filler is engineered through careful blending of virgin PTFE resin and fine amorphous silica particles. As a specialized silica filled PTFE sheet manufacturer, we supply sheets that resist creep, reduce cold flow, and maintain seal integrity under high bolt loads. The high temperature PTFE gasket silica filled grade performs continuously at 260°C (500°F) with short-term peaks up to 300°C (572°F). Typical sheet dimensions include 1500 mm × 1500 mm, 1500 mm × 1000 mm, and 1000 mm × 1000 mm, with thicknesses from 0.5 mm to 6.0 mm. The material is ideally suited for flanges, heat exchangers, reactors, and piping systems exposed to steam, hot oils, strong acids, alkalis, and solvents. Its silica filler content of 15–20% by weight significantly improves dimensional stability and lowers permeability compared to standard virgin PTFE sheets, ensuring a longer service life in demanding sealing environments.
Silica Filled PTFE Gasket Sheet for High Temp delivers a balanced combination of chemical resistance, temperature tolerance, and mechanical strength. The product is manufactured from virgin PTFE resin compounded with amorphous silica, resulting in a dense sheet with a smooth surface finish and uniform filler dispersion. This structure eliminates the cold flow problems common with unfilled PTFE and allows for reliable sealing in both static and lightly dynamic applications. The sheet can be easily cut into custom gasket shapes using standard knife or die cutting tools, and its non-stick surface simplifies installation and removal during maintenance.
Key Advantages
Technical Specifications
| Property | Typical Value |
|---|---|
| Filler Type | Amorphous silica |
| Filler Content | 15–20% by weight |
| Color | Off-white / light beige |
| Continuous Service Temperature | -200°C to +260°C (-328°F to +500°F) |
| Short-Term Peak Temperature | 300°C (572°F) |
| Maximum Pressure | 40 bar (580 psi) |
| Tensile Strength | 12–15 MPa |
| Elongation at Break | 250–300% |
| Hardness | 55–60 Shore D |
| Density | 2.10–2.20 g/cm³ |
| Compressibility (ASTM F36) | 6–10% |
| Recovery (ASTM F36) | 35–45% |
| Leak Rate (DIN 3535) | <0.01 mg/(s·m) |
| Standard Sheet Sizes | 1500 mm × 1500 mm, 1500 mm × 1000 mm, 1000 mm × 1000 mm |
| Thickness Range | 0.5 mm, 0.8 mm, 1.0 mm, 1.5 mm, 2.0 mm, 3.0 mm, 4.0 mm, 5.0 mm, 6.0 mm |
| Certifications | FDA compliant, RoHS compliant, REACH compliant |
