Graphite Paper

Graphite sheet is produced from high-carbon flake graphite through chemical treatment, high-temperature expansion, and calendaring or rolling processes.
It is a resin-free, binder-free flexible graphite material and serves as the base material for various graphite sealing products.

Raw Material:
High-Carbon Flake Graphite

Production Process:
Chemical treatment → High-temperature expansion → Calendaring / Rolling

Specifications:
• Thickness: 0.15–3.0 mm (customizable)
• Width: ≤1500 mm
• Density: 0.7–1.4 g/cm³ (adjustable upon request)
• Carbon content: ≥99% (up to ≥99.9%)

Key Properties:
• Excellent high-temperature resistance (up to 450°C in continuous service; higher in inert atmosphere)
• Outstanding flexibility and resilience
• Superior sealing performance and creep resistance
• Excellent chemical corrosion resistance
• Good thermal and electrical conductivity
• No aging or embrittlement, long service life

 

Applications:
• Graphite gaskets, sealing rings, sealing tapes
• Flexible graphite composite sheets and metal-reinforced gaskets
• Sealing systems in chemical, petrochemical, metallurgical, and power industries
• Sealing of pipelines, valves, pumps, and pressure vessels

 

	一级	二级	三级
碳含量（%）	≥99.9	≥99	≥99
抗拉强度mPa	≥4.5	≥4.5	≥4.0
硫含量ppm	≤300	≤800	≤1200
氯含量ppm	≤35	≤35	≤50
密度公差g/cm3	±0.03	±0.03	±0.05
厚度公差mm	≤1.5 ±0.03	>1.5 ±0.03	>1.5 ±0.05
压缩率%	35~55
回弹率%	≥10
应力松弛率%	≤10