EMI Shielding Graphite Sheet

I. Product Core

As a versatile electromagnetic shielding material, the EMI Shielding Graphite Sheet is fabricated using high-purity graphite as its core substrate, processed through specialized carbonization, graphitization, and rolling techniques. Its primary value lies in the seamless integration of high-efficiency electromagnetic interference (EMI) blocking and superior thermal conductivity, complemented by the benefits of lightweight design, flexible adaptability, and cost-effectiveness. This material is widely applicable across a range of electronic devices, effectively addressing two critical challenges: electromagnetic radiation interference and equipment overheating. By ensuring the stable operation of electronic components, it meets the evolving demands for thinner, lighter, and more reliable equipment, serving as an eco-friendly and efficient alternative to traditional metal shielding materials.

II. Technical Parameters

III.Core Features

Efficient EMI Shielding with Broad Frequency Adaptability: Featuring a multi-layer alternating lamination structure (minimum 5 layers), the sheet combines two graphite layers with varying densities to deliver exceptional shielding performance. It achieves a shielding effectiveness (SE) of over 110dB across the 30MHz~1500MHz frequency band, with select models offering attenuation of more than 60dB in the 240~320GHz range. This design effectively absorbs and reflects electromagnetic radiation, preventing internal signal leakage while isolating external interference-eliminating issues like signal distortion and performance degradation, and making it suitable for electronic devices operating across both high and low frequency spectrums.

Superior Thermal Conductivity and Heat Dissipation: Leveraging graphite's unique grain orientation, the sheet boasts a horizontal thermal conductivity of 700~1300W/m·K, with high-end variants reaching up to 1800W/m·K. It efficiently dissipates heat generated by core electronic components, enabling uniform heat distribution to reduce the risk of local overheating. This dual functionality-shielding and heat dissipation-eliminates the need for additional heat sinks, simplifying equipment design while extending the lifespan of electronic parts.

Exceptional Flexibility and Adaptability: Manufactured via high-temperature expansion and mechanical rolling, the sheet exhibits excellent flexibility and bendability, capable of withstanding 180° repeated bending (up to 50,000 cycles for select models) without cracking. It conforms tightly to complex curved surfaces, narrow gaps, and irregular component shapes, and can be die-cut or trimmed to custom sizes and configurations. This versatility allows for easy integration into diverse equipment without requiring complex processing.

Lightweight, Eco-Friendly, and Reliable: With an apparent density of just 1.3~2.2g/cm³-significantly lower than traditional metal shielding materials like copper and aluminum-it reduces overall equipment weight, aligning with the trend toward thinner, lighter electronics. Produced using a residue-free polymer graphitization process, it contains no harmful substances, ensuring environmental safety and non-toxicity. Its excellent chemical stability ensures resistance to acids, alkalis, and aging, with no corrosion or volatilization, guaranteeing long-term use without damaging electronic components.

Easy Processing, Simple Installation, and Cost-Effective: Compatible with compound processing with metals, plastics, and adhesives, the sheet supports flat-knife and round-knife die-cutting for efficient manufacturing. Self-adhesive variants are available for quick, secure installation, directly adhering to components to boost production efficiency. The mixed laminate graphitization process reduces raw material costs, offering comparable shielding performance to pure metal materials at a lower overall manufacturing cost.

 

 

IV. Applications

Combining shielding, thermal conductivity, flexibility, and lightweight properties, the EMI Shielding Graphite Sheet is widely used in consumer electronics, automotive electronics, communication equipment, industrial control, and aerospace industries. Specifically, EMI Shielding Graphite Sheet plays a crucial role in optimizing the performance of electronic devices, and its key applications include:

Consumer Electronics: Ideal for smartphones, laptops, tablets, smartwatches, digital cameras, and LED displays. It shields core components such as CPUs, batteries, and RF modules from EMI while dissipating heat, preventing device overheating, signal interference, and performance throttling to ensure a smooth user experience.

Automotive Electronics: Suitable for new energy vehicle battery packs, in-vehicle navigation systems, autonomous driving chips, on-board sensors, and entertainment systems. It mitigates EMI between on-board components and efficiently cools batteries and chips, reducing overheating risks and ensuring the stable, safe operation of automotive electronic systems in extreme temperatures (-55~160℃).

Communication Equipment: Used in 5G base stations, routers, switches, fiber optic modules, and wireless communication devices. It blocks cross-signal interference to enhance transmission stability and resolves heat buildup during prolonged operation, supporting high-power communication equipment and ensuring reliable connectivity.

Industrial Control & Medical Equipment: Applied in industrial control modules, PLCs, precision instruments, and medical testing devices (e.g., ultrasound machines, detectors). It shields precision components from industrial EMI, ensuring accurate detection and stable operation while meeting strict environmental and safety standards for medical equipment.

Aerospace: Integrated into satellite and spacecraft electronic components. Its lightweight design, wide temperature stability (-40~400℃), and superior shielding-thermal performance make it suitable for extreme space environments, ensuring stable operation of aerospace electronics while reducing spacecraft weight and launch costs.

V. Product Advantage Summary

Unlike traditional metal shielding materials (copper foil, aluminum foil), the EMI Shielding Graphite Sheet stands out with its integrated "high-efficiency shielding + superior thermal conductivity" capabilities, along with flexibility, lightweight design, eco-friendliness, and cost control. It addresses the limitations of traditional materials-such as insufficient shielding, heavy weight, and cumbersome processing-while overcoming the lack of shielding functionality in single-purpose thermal conductive materials. Through advanced multi-layer alternating lamination and polymer graphitization technology, EMI Shielding Graphite Sheet balances shielding performance, thermal conductivity, and cost, making it ideal for upgrading a wide range of electronic devices. As a next-generation integrated EMI shielding and thermal management solution, it drives the development of thinner, more reliable, and eco-friendly equipment.

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