1. Product Core

Pure Graphite with Carbon Yarn Corners,a functional graphite product manufactured using high-purity natural flake graphite (or artificial graphite) with a carbon content of ≥99.8% as the substrate. High-modulus carbon fiber yarn (referred to as "carbon yarn") is compounded in the key stress-bearing areas at the product's corners. The manufacturing process follows: substrate compression molding → carbon yarn prepreg bonding → high-temperature curing → precision cutting. Its core value lies in:

Retaining pure graphite's inherent properties: resistance to extreme temperatures, strong corrosion resistance, and high thermal/electrical conductivity;

Solving the pain points of traditional pure graphite-easy corner chipping and poor tear resistance during handling, installation, and dynamic operation-via the carbon yarn-reinforced corner structure;

Meeting the needs of industrial scenarios with high requirements for structural integrity.

2. Core Features

Ultra-High Purity and Cleanliness

The substrate has a carbon content of ≥99.8%, ash content of ≤0.2%, sulfur content of ≤200ppm, and chlorine content of ≤30ppm. It contains no additives (e.g., resins, metal impurities) and complies with food-grade standards (FDA 21 CFR Part 177.2600) and semiconductor industry cleanliness requirements. Suitable for scenarios requiring zero pollutant leaching (e.g., pharmaceutical, electronics industries).

Outstanding Corner Reinforcement Performance

Corners are bonded with 12K/24K high-modulus carbon fiber yarn (tensile modulus ≥230GPa) via a twill weaving + epoxy resin prepreg process. This enhances the product's corner tear resistance by 40%–60% (traditional pure graphite corners have ~8MPa tear resistance; this product reaches 12–13MPa) and reduces the corner damage rate from 25% to <3% during handling and installation.

Extreme Environment Tolerance

Temperature range: -200℃ to 600℃ (air atmosphere, no oxidative weight loss); -200℃ to 3000℃ (inert atmosphere, e.g., nitrogen/argon);

Withstands static pressure ≤28MPa and dynamic sealing linear speed ≤18m/s;

After 72-hour immersion in acid-base solutions (pH 0–14), high-temperature steam, or organic solvents, performance degradation is ≤5%.

Balanced Mechanical and Functional Properties

Mechanical strength: Flexural strength ≥25MPa (20% higher than traditional pure graphite), compressive strength ≥40MPa, elongation at break ≥1.2%;

Functional retention: Maintains pure graphite's high thermal conductivity (in-plane thermal conductivity ≥150W/m·K) and high electrical conductivity (volume resistivity ≤15μΩ·cm), balancing structural strength and functional demands.

Strong Engineering Adaptability

Conventional dimensions: Thickness 0.5–5mm, length/width 50–1000mm (custom special-shaped sizes available);

Carbon yarn coverage width at corners: 5–20mm (adjustable on demand);

Supports adhesive-backed (acrylic adhesive/silicone-based adhesive) or non-adhesive designs; can be directly cut during installation, fitting irregular equipment structures (e.g., special-shaped flanges, curved sealing surfaces).

 

 

3. Application Fields

3.1 Industrial Sealing Systems

Chemical Equipment: Flange sealing for acid-base reaction kettles, shaft sealing for high-temperature medium transfer pumps. Leverages corrosion resistance and corner tear resistance to solve seal failure caused by corner chipping of traditional pure graphite gaskets during disassembly/assembly; extends seal service life to 8,000–10,000 hours.

New Energy Equipment: Edge sealing for bipolar plates in hydrogen electrolyzers, door sealing for lithium battery drying ovens. Carbon yarn corners withstand mechanical impacts from frequent door opening/closing, while meeting low impurity leaching requirements (metal ion content ≤1ppm) to ensure electrolyte purity.

3.2 High-Temperature Industrial Equipment

Photovoltaic Manufacturing: Edge thermal insulation components for single-crystal furnace thermal fields. Withstands 1,600℃ high temperatures; carbon yarn corners prevent edge cracking from thermal expansion/contraction, extending single-use cycles from 1,500 hours to 2,200 hours.

Metallurgical Industry: Thermal insulation gaskets for aluminum profile extrusion dies. Resists 450℃ high temperatures and aluminum liquid corrosion; reinforced corners avoid damage during die disassembly/assembly, reducing consumable replacement costs by 30%.

3.3 Electronics & Semiconductor Field

Power Device Heat Dissipation: Thermal conductive gaskets between IGBT modules and heat sinks. High thermal conductivity ensures heat transfer; carbon yarn corners prevent mechanical damage during installation, adapting to high-speed pick-and-place requirements of automated assembly lines.

Semiconductor Cleaning Equipment: Seals for wafer cleaning tanks. Resists strong acid corrosion (e.g., HF solution); cleanliness complies with SEMICON F47 standards, avoiding impurity contamination on wafer surfaces.

3.4 Special Engineering Field

Aerospace: Low-temperature sealing for spacecraft propulsion systems (-196℃ liquid nitrogen environment). Carbon yarn-reinforced structures improve low-temperature anti-brittle cracking performance, ensuring sealing reliability under extreme temperatures.

Nuclear Industry: Sealing for auxiliary pipelines in nuclear reactor cooling systems. Resists radiation (γ-ray dose ≤10⁶Gy) and 350℃ high temperatures; corner strength meets long-term service requirements, reducing maintenance frequency.

4. Technical Parameters

5. Supplementary Notes

Customization Services: Carbon yarn type (e.g., high thermal conductivity carbon fiber yarn), corner coverage range, and product dimensions can be adjusted per customer needs. Special-shaped structures (e.g., circular, arc-shaped) are supported, with a minimum custom thickness of 0.3mm.

Quality Certifications: The product has passed ISO 9001 Quality Management System certification, SGS environmental testing (RoHS 2.0), and SEMICON F47 semiconductor cleanliness certification. Third-party test reports are available upon request.

Installation Recommendations:

During the installation of Pure Graphite with Carbon Yarn Corners, direct contact between sharp tools and its carbon yarn corners should be avoided; silicone pressure strips are recommended for auxiliary fixation.For high-temperature applications, preheating at 200℃ for 2 hours is advised to reduce thermal deformation.

Revision Notes 

Technical Terminology Correction

"Diagonal weaving" → "twill weaving" (standard term for textile structure in composite materials);

"Pre soaking process" → "prepreg process" (industry-standard for pre-impregnated fiber technology);

"Irregular size/structure" → "special-shaped size/structure" (common in industrial manufacturing to avoid ambiguity);

"Surface thermal conductivity" → "in-plane thermal conductivity" (accurate for graphite's anisotropic thermal properties).

Structural Logic

Corrected repeated numbering in "Application Fields" (from multiple "1." to sequential 3.1/3.2/3.3/3.4);

Standardized unit formatting (e.g., "200 ℃/2 hours" → "200℃ for 2 hours"; no spaces between numbers and symbols like ℃/MPa/μΩ·cm).

Format Optimization

Converted "Technical Parameters" from plain text to a table (critical for quick reference in industrial documents);

Clarified ambiguous phrases (e.g., "adhesive backing (acrylic/silicone)" → "adhesive-backed (acrylic adhesive/silicone-based adhesive)" to specify adhesive types).

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