RFQ Checklist
- Target expansion volume (e.g., 200 ml/g, 300 ml/g)
- Required onset temperature (e.g., 160°C, 220°C)
- Particle size (mesh size) and carbon purity percentage
- Host material (e.g., PU foam, rubber) and required pH limits
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Expandable Graphite & Flame Retardants
Intercalated expandable graphite flakes for advanced, halogen-free flame retardants and industrial thermal management.
Target Buyer:For material scientists, chemical compounders, and EV battery engineers seeking eco-friendly, highly effective fire protection additives.
Complete RFQs are easier to review within 1-2 business days when drawings, graphite grade, quantity, and destination are included.
Capability Highlights
- High-performance halogen-free flame retardant additive
- Massive expansion volume when exposed to extreme heat
- Customized expansion temperatures, particle sizes, and pH levels
Typical Applications
- Polyurethane foams and EPS insulation panels
- Fire-stop collars, sealants, and coatings
- Battery pack thermal runaway protection
- Roofing materials and rubber compounds
- Gasket manufacturing (flexible graphite foil precursor)
Engineering Focus
- Expansion onset temperature (SET) tailored to polymer processing limits
- Particle size distribution to balance mechanical strength and fire performance
- Neutralization (pH) to prevent corrosion of processing equipment
Key Evaluation Matrix
| Metric | Typical Range | Why It Matters |
|---|---|---|
| Expansion Volume | 150 - 350+ ml/g | Determines the thickness and effectiveness of the insulating char layer formed during a fire. |
| Carbon Content | 85% - 99% | Higher carbon purity provides better thermal stability and fewer impurities in the final product. |
| pH Value | 5.0 - 8.0 | Neutral pH is critical to prevent acidic corrosion of processing machinery and metal contacts in end-use (e.g., EV batteries). |
Risk Controls
- Premature expansion during compounding: Strictly match the onset temperature of the graphite to be safely above the polymer processing temperature.
- Acidic corrosion of equipment: Use thoroughly washed and neutralized grades (pH 6-8) to protect extrusion screws and molds.
- Loss of mechanical strength in host polymer: Optimize particle size (mesh); larger flakes give better fire protection but can reduce polymer tensile strength.
Product Gallery
Buyer FAQ
Why use expandable graphite instead of traditional flame retardants?
It is halogen-free, non-toxic, and acts physically by forming a thick, insulating intumescent char layer that cuts off oxygen and heat.
How do I choose the right onset temperature?
The onset temperature must be higher than your manufacturing process temperature (e.g., extrusion) to prevent premature expansion, but low enough to react quickly in a fire.
Can you provide samples for R&D?
Yes, we can provide specific grades for compounding trials based on your particle size and expansion requirements.
Related Resources
Inquiry Email
Complete RFQs are easier to review within 1-2 business days when drawings, grade, quantity, and destination are included.
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+8618857971991
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