Graphite paper, also known as flexible graphite paper or expanded graphite calender paper, is a thin-layer material produced by chemically treating high-purity natural graphite, followed by high-temperature expansion and calendering. It boasts excellent planar thermal conductivity, good electrical conductivity, lightweight, soft, and easy-to-cut and attach properties. With stable chemical properties and corrosion resistance, its anisotropic thermal conductivity makes it uniquely valuable in high-precision industries.
Main Application Fields and Functions
- The thermal management sector (core application) represents the most extensive and mature application of graphite paper, functioning as a 'thermal diffuser' or 'heat sink'. It is primarily used in smartphones and consumer electronics, LED lighting, and laptops and servers.
- Electromagnetic shielding and sealing mainly use the conductive and compressible elastic properties of graphite, and mainly applied in electromagnetic interference shielding gasket and conductive gasket.
- The fuel cell sector represents another high-end and rapidly evolving application. It is primarily utilized as the substrate for graphite composite bipolar plates or directly processed into flow field plates.
- In the extremely precise semiconductor manufacturing and testing, graphite paper has special uses as the carrier and protection in the high temperature heat treatment process and the thermal interface material in the vacuum environment.
- Flexible electronics and sensors-as conductive substrates for flexible circuits, strain sensors or heating films.
In the electronics and semiconductor industry, graphite paper is essentially a high-performance "functional material" that addresses critical thermal management challenges in high-power, miniaturized devices. It ensures stable operation and regulatory compliance in complex electromagnetic environments, serves as a key component in fuel cells to advance clean energy applications, and provides reliable support in demanding semiconductor manufacturing conditions. With continuous advancements in 5G/6G communications, AI chips, electric vehicles, and semiconductor technologies, the demand for efficient thermal and electromagnetic management has become increasingly urgent. As a result, the importance of graphite paper and its derivative composites continues to rise, positioning them as indispensable "hidden champions" in modern electronic products.