Natural Graphite Sheet
Natural flake graphite calendered into high-thermal graphite sheet — in-plane conductivity 100–1500 W/m·K, ultra-thin lightweight. Fast heat spreading, custom die-cuttable. Common material for smartphone, tablet and battery compartment heat spreading.
Key Features
- In-plane 100–1500 W/m·K, high spreading efficiency
- Ultra-thin lightweight, no added thickness
- Fast heat spreading, uniform cooling
- Custom die-cuttable for various shapes
Applications
Smartphone/tablet heat spreading · Battery compartment cooling · Consumer module cooling · Mid-power chip cooling
Material Tags
Technical Parameters
| Type | Natural graphite sheet |
|---|---|
| In-plane Conductivity | 100–1500 W/m·K |
| Thickness | 0.01–0.10 mm |
| Density | 1.5–2.2 g/cm³ |
| Temperature | −40 ~ 400 °C |
| Adhesive | Single/double-side optional |
| Die-Cutting Tolerance | ±0.10 mm |
Frequently Asked Questions about Natural Graphite Sheet
Common questions about die-cutting and material selection for this product
Natural vs Synthetic Graphite Die-Cutting Differences?
Natural graphite is lower cost (400-700 W/mK), suitable for general thermal scenarios. Synthetic graphite offers higher conductivity (up to 1800 W/mK) and thinner profiles (0.025mm), ideal for high-power chip cooling. In die-cutting, synthetic graphite is more brittle, requiring precision dies and gentler waste removal.
Why does graphite sheet need edge sealing after die-cutting?
Graphite edges shed tiny particles after die-cutting; if these fall into electronic devices they risk short circuits. Therefore graphite sheets are usually edge-sealed after cutting (film lamination over edges) to prevent particle shedding. Common methods: full PET film edge sealing or partial sealing, chosen by application.
What's difficult about ultra-thin graphite sheet (0.025 mm) die-cutting?
0.025 mm ultra-thin graphite tears and deforms very easily, making die-cutting very difficult. Requirements: precision tension-controlled feeding, dedicated ultra-thin dies (15-20 degree blade angle), very low die-cutting speed, and gentle waste removal. Operate in a cleanroom and add visual inspection to ensure no damage.
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