Products Description
RoHS-compliant flexible graphite materials, including sheets, foil, paper, tape, and strips, are derived from natural graphite flakes through a proprietary process:
- Chemical Exfoliation: Graphite flakes undergo intercalation with sulfuric acid to create expandable graphite.
- Thermal Expansion: Heated to 1000°C+, producing worm-like structures with a bulk density of 0.003g/cc.
- Cold Rolling: Compressed into binder-free coils/sheets, ensuring 99.9% purity and halogen-free composition.
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Toxic Substance Free
- Complies with EU RoHS 2011/65/EU (Restriction of Hazardous Substances).
- Contains <0.1% lead, <0.01% cadmium, and zero mercury/chromium VI.
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Multi-Industry Adaptability
- Electronics: EMI shielding gaskets for smartphones/tablets (IEC 61373 compliance).
- Automotive: Engine compartment seals resisting glycol-based coolants (SAE J2006).
- Medical: Non-toxic seals for MRI equipment and pharmaceutical pumps (USP Class VI).
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Performance Metrics
- Temperature Range: -200°C to +1650°C (oxidation resistance up to 500°C in air).
- Compressive Strength: 45-60 MPa (ASTM F36), with 90% recovery after 10,000 cycles.
- Gas Permeability: <0.01 cm³/(m·s·Pa) for helium leakage (ASTM D1434).
- Special Coatings:
- PTFE-laminated variants for RoHS-compliant chemical resistance.
- Silicone-free options for semiconductor manufacturing.
- Hybrid Composites:
- Stainless steel-reinforced sheets for RoHS-compliant high-pressure applications (ASME B16.20).
- Carbon fiber interleaves for lightweight, rigid gaskets in aerospace (FAR 25.853).
- Certifications:
- EU RoHS 2011/65/EU Annex II compliant.
- REACH registered (EC 1907/2006).
- FDA 21 CFR Part 177.2600 compliant for food contact.
- Testing Reports:
- SGS-tested for heavy metals (EN 1122:2001).
- UL 94 V-0 flame rating available upon request.
Parameter | Standard Range | Custom Options |
Width | 1000mm/1500mm | 500-2000mm (special orders) |
Thickness | 0.15-5.0mm | 0.05-10mm (precision cutting) |
Density | 0.8-1.25g/cm³ | 0.5-1.5g/cm³ (density gradient) |
RoHS Compliance | Yes (with certificate) | Additional REACH SVHC testing |
- Cost Efficiency: Reduces compliance risks in global supply chains.
- Technical Support: Free FEA analysis for critical RoHS applications.
- Sustainability: 98% material recyclability with carbon-neutral shipping options.
Engineered for performance without compromising environmental responsibility.
Item | Standard Value |
C concentration | 99% |
S concentration | <1000ppm |
chlorine concentration | <45ppm |
tensile strength | 4.5MPa |
compressibility | >40% |
recovery | >10% |
Temperature | -200ºC-600ºC |
Pressure | 20MPa |
Terence of Thickness | -0.04mm~+0.04mm |
Terence of Dimension | In accordance with your Gasket size |
Terence of Density | -0.06~g/cm3+0.06gcm3 |
Grades Separate :JB/T53392-1999 Mechanical Data | Qualified product | Top Grade | Superior Grade |
Density Tolerance g/cm3 | <0.4 | ±0.10 | ±0.05 |
≥0.4 | ±0.07 |
Tensile Strength MPa | ≥3.2 | ≥4.5 | ≥5.0 |
Compression Ratio % | 35~55 |
Rebound Rate % | ≥9 | ≥11 | ≥12 |
Stress relaxation rate % | ≤10 |
Ash % | ≤6.0 | ≤3.0 | ≤1.0 |
Heat loss on ignation % | 450ºC | ≤1.0 | ≤0.5 |
600ºC | ≤20 | ≤15 |
Sulphur content | ≤1500ppm | ≤1000ppm | ≤600ppm |
Chloride content | ≤100ppm | ≤50ppm | ≤20ppm |
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