Product Overview
Expanded graphite powder, also known as vermicular graphite, is produced by treating natural flake graphite with chemical intercalation and thermal expansion. With excellent compressibility, resilience, and sealing properties, expanded graphite powder is the primary raw material for manufacturing flexible graphite sheets, gaskets, packing, and other sealing products.
Key Features
- High expansion ratio (100-300x)
- Excellent compressibility and recovery
- Superior sealing performance
- High temperature resistance
- Good chemical resistance
- Low ash content available
- Various expansion ratios and particle sizes
Technical Specifications
| Parameter | Unit | Value |
|---|---|---|
| Material | - | Natural Flake Graphite |
| Carbon Content | % | 98 - 99.9 |
| Expansion Ratio | ml/g | 100 - 300 |
| Moisture Content | % | <0.5 |
| Ash Content | % | <2.0 |
| Sulfur Content | ppm | <1000 |
| pH Value | - | 5 - 7 |
Applications
- Flexible graphite sheet production
- Graphite gasket and seal manufacturing
- Graphite packing and braided packing
- Graphite tape and foil production
- Battery material additive
- Thermal management materials
- Refractory and lubricant applications
Why Choose Jincheng Expanded Graphite?
We supply high-quality expanded graphite powder for sealing material manufacturers worldwide. Our expanded graphite is produced from high-grade natural flake graphite with consistent expansion ratios and low impurity levels. We offer various expansion grades to meet different gasket and sealing product requirements.
FAQ
Q: What expansion ratio should I choose for gasket production?
A: Higher expansion ratio (200-300 ml/g) produces more compressible and conformable graphite ideal for soft gaskets. Medium expansion ratio (100-200 ml/g) provides a balance of compressibility and strength for general gasket applications. The optimal grade depends on your specific gasket product requirements.
Q: What is the typical sulfur content in expanded graphite?
A: Standard expanded graphite has sulfur content around 800-1500 ppm. For applications where sulfur-induced corrosion is a concern (such as stainless steel flanges), low-sulfur expanded graphite with <500 ppm sulfur is available. Please specify your sulfur requirements when ordering.
Q: How should expanded graphite powder be stored?
A: Expanded graphite should be stored in a dry, sealed container away from moisture and contamination. While it is not hygroscopic, exposure to moisture or oils will affect its expansion and sealing properties. Properly stored expanded graphite has a shelf life of several years.
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