Flexible Graphite Foil
Flexible Graphite Foil is a flexible sheet material made from high-purity expanded graphite. It combines excellent thermal conductivity, high-temperature resistance, and chemical stability inherent to graphite. Its flexibility and compressibility make it suitable for high-temperature sealing, thermal management, and electromagnetic shielding applications. It is widely used in aerospace, electronics, industrial sealing, and energy sectors.
- Custom and standard options available.
- Fast lead times guaranteed.
- High performance at a competitive price.
Flexible Graphite Foil Data Sheet
| Purity | ≥99.9% |
| Color | Dark Gray to Black |
| Chemical Formula | C |
| Material Grades | Natural Graphite, Synthetic Graphite, Specialty Graphite, Composites Graphite |
| Density | 0.7–1.8 g/cm³ |
| Maximum Operating Temperature | Up to 3000°C (in inert atmosphere) |
| Thermal Conductivity | 100–200 W/m·K |
Flexible Graphite Foil Description
Flexible Graphite Foil is a flexible sheet material produced through chemical treatment, high-temperature expansion, and calendering of high-purity natural flake graphite. It retains graphite’s inherent superior properties—high temperature resistance (suitable for long-term use in non-oxidizing environments from -200℃ to 3000℃), excellent thermal and electrical conductivity, and chemical stability—while offering unique flexibility and plasticity. It can conform to irregular surfaces and adapt to dynamic operating conditions. With self-lubricating, radiation-resistant, and corrosion-resistant characteristics, it is widely used in high-temperature gaskets, fuel cell bipolar plates, thermal interface materials for management systems, electromagnetic shielding components, and flexible heating elements.
Flexible Graphite Foil Specifications
| Specifications | ||||
| Thickness (mm) | Width (mm) | Length (m) | Density (g/cm3) | |
| 0.028-1.6 | 42-1500 | 1-910 | 0.7-1.8 | |
| Tolerance | ||||
| Thickness tolerance (mm) | <1: ±0.03 1-1.5: ±0.05 >1.5: ±0.1 | |||
Flexible Graphite Foil Main Properties Parameters
| Item | HM-A | HM-B | HM-C | HM-D | HM-E |
| C ( %) | ≥99.5 | ≥99.2 | ≥99 | ≥98.5 | ≥98 |
| S (PPM) | ≤200 | ≤500 | ≤1000 | ≤1300 | ≤1500 |
| Cl (PPM) | ≤20 | ≤30 | ≤40 | ≤45 | ≤50 |
| Density tolerance (g/cm3) | ±0.03 | ±0.03 | ±0.04 | ±0.05 | ±0.05 |
| Tensile strength (MPa) | ≥4.0 | ||||
| Compression rate (%) | ≥40 | ||||
| Resilience rate (%) | ≥10 | ||||
Flexible Graphite Foil Features
- Excellent Temperature Resistance
Can operate stably in non-oxidizing environments from -200℃ to 3000℃. - High Thermal & Electrical Conductivity
Maintains graphite’s inherent high thermal conductivity and electrical conductivity. - Outstanding Flexibility & Adaptability
Easily bent, cut, and conforms to complex surfaces, suitable for dynamic applications. - Strong Chemical Stability
Resistant to acids, alkalis, and organic solvents for long-term reliability. - Self-Lubricating & Pressure-Resistant Sealing
Low friction coefficient and good resilience, ideal for high-temperature/pressure sealing. - Effective Electromagnetic Shielding
Provides strong absorption and shielding against high-frequency electromagnetic waves. - Lightweight & Easy Installation
Low density and lightweight, facilitating processing and system integration.
Flexible Graphite Foil Applications
- High-Temperature Gaskets & Seals
Used for static sealing in engines, pipe flanges, and valves under high temperature and pressure, replacing traditional asbestos gaskets. - Thermal Interface Materials
Serves as thermal pads or gap fillers between electronic components (e.g., chips, power modules) and heat sinks for efficient heat dissipation. - Fuel Cell Bipolar Plates
Acts as a core component in PEM fuel cells, providing functions of electrical conductivity, gas distribution, and corrosion resistance. - Electromagnetic Shielding Material
Used in electronic device casings and cable wrapping for effective EMI shielding. - Substrate for Flexible Heating Elements
Can be used as a base material for electric heating films and planar heaters to achieve uniform heating. - Industrial Furnace Lining & Insulation
Used as flexible seals, insulation layers, or expansion joints in high-temperature furnaces.
Graphite Ceramic Packaging
Graphite ceramic products are typically packaged in vacuum-sealed bags to prevent moisture or contamination and wrapped with foam to cushion vibrations and impacts during transport, ensuring the quality of products in their original condition.
Download
- SAFETY DATA SHEET (SDS) -Flexible Graphite Foil Applications
FAQ
What is Flexible Graphite Foil?
It is a flexible sheet material made by compressing high-purity expanded graphite, combining graphite’s excellent thermal/electrical conductivity with good flexibility and moldability.
What temperature can it withstand?
It can operate long-term from -200℃ to 550℃ in air (non-oxidizing), and up to 3000℃ in inert atmospheres or vacuum.
Can it be cut with scissors or knives?
Yes, it is easily cut, stamped, or die-cut into complex shapes for convenient on-site installation.
Does it require adhesive?
Usually not. Its inherent compressibility and resilience allow it to seal by conforming to surface irregularities. Specific applications may use specialized adhesives.
How should it be stored?
Store in a cool, dry place away from direct exposure to moisture or strong oxidizing environments. Keep flat to prevent creasing.
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