Core concept of the product
Graphite Roll Material is made of high purity flake graphite through high temperature expansion and precision rolling process at 800-1000°C, with layered crystal structure. This design makes it have high thermal conductivity, chemical corrosion resistance and flexibility, which is very suitable for stable use in extreme environments such as high temperature, corrosion or strong mechanical stress.
Technical parameters
|
Item |
Specification |
||
|
Thickness (mm) |
0.2-0.5 |
0.5-1.0 |
1.0-2.0 |
|
Density (g/cm³) |
1.0-1.5 |
1.0-1.5 |
1.0-1.3 |
|
Ash Content (%) |
500-1100 |
500-1100 |
≤1500 |
|
Carbon Content (%) |
≥99 |
≥99 |
95-99 |
|
Sulfur Content (PPM) |
≤1200 |
≤1200 |
≤1200 |
|
Oxygen Content (PPM) |
≤30 |
≤40 |
≤50 |
|
Tensile Strength (MPa) |
≥4.5 |
≥5.0 |
≥4.0 |
|
Compression Ratio (%) |
35~55 |
35~55 |
35~55 |
|
Recovery Rate (%) |
≥9 |
≥9 |
≥9 |
|
Thermal Weight Loss (%) |
≤0.5 (450℃) |
≤1.0 (450℃) |
≤1.0 (450℃) |
|
Stress Relaxation Rate (%) |
≤10 |
≤10 |
≤10 |
Note: The product supports customization
Core advantage
- Excellent thermal stability
In oxidizing, reducing or vacuum environments, it can work normally in the temperature range of -200°C to 3000°C; in air at 670°C, the weight loss per hour is less than 2%, ensuring a long service life.
- Chemical resistance
It is resistant to acids, alkalis and solvents (pH value 0-14, except strong oxidants), and has a very low ash content (<0.15%), which meets the requirements of semiconductor grade purity.
- Excellent mechanical properties
Its compression rate is up to 35-55%, the creep relaxation rate is low (<12% at 670°C), and tight seal can be achieved on irregular surfaces; the built-in lubrication can reduce the wear in dynamic systems.
- Customizable design
Thickness is available in the range of 0.2-1.5 mm and density in the range of 0.7-1.95 g/cm³. For high-pressure applications, a metal reinforcement layer (e.g., 316/304 stainless steel) can be added.
Application scenarios
- Petrochemical and energy field: flange gasket, valve packing, heat exchanger interface seal.
- Electronics industry: power device heat dissipation layer, low volatility clean room gasket.
- New energy: battery insulation layer, fuel cell bipolar plate.
- Heavy industry: rolling mill accessories, aerospace high temperature seals.
- Nuclear industry: radiation-resistant containment pads for reactor safety shells.
Solutions And Customized Services Provided
Graphite Roll Material is essentially a continuous adhesive free roll formed by rolling high-purity expanded graphite. It is the most basic semi-finished substrate for sealing gasket factories, petrochemical MRO factories, and automotive exhaust gasket factories. It mainly solves three core pain points for customers: "inability to prefabricate standard gaskets", "sealing failure under high temperature corrosion conditions", and "out of stock irregular large flanges".
〤Non standard/large-sized flanges cannot be purchased with finished gaskets
Cut circles with scissors/compasses according to the required OD/ID, drill installation holes, and directly install without mold fees or delivery time restrictions. MRO inventory only requires the preparation of roll materials.
01
〤Gasket aging and leakage caused by high temperature and corrosion
Continuous resistance to 450 ℃ (inert gas 3000 ℃+) in air, chemically inert to almost all media except strong oxidizing acids → Life is usually 5-10 times that of rubber gaskets. Continuous resistance to 450 ℃ (inert gas 3000 ℃+) in air, chemically inert to almost all media except strong oxidizing acids → Life is usually 5-10 times that of rubber gaskets
02
〤The creep and relaxation of the gasket resulted in further tightening and production stoppage
When the density is 1.0 g/cm ³, the compression rate is 30-40%, and the rebound is ≥ 15%. It absorbs thermal expansion and contraction, and maintains a sealed pressure ratio.
03
〤Long delivery time/incomplete specifications for outsourced finished gaskets
1 roll of 1m × 50m can be cut to any size from Ø 50 to Ø 1000mm → Transfer the delivery time from external procurement to internal production, with strong MRO emergency capability.
04
〤Metal wrapped pads cannot be used on micro pressure/corrugated surfaces
Thin to 0.5mm, it can still bend and attach corrugated surfaces, glass lined flanges → fill micro unevenness.
05
Compliance and customized services
- Certification qualification: Graphite Roll Material complies with EU REACH, RoHS standards, as well as MESC 85/203, EN 14772, API 6FB and other industry standards.
- Customization options: Maximum width of 1524 mm, maximum length of 100 m; polytetrafluoroethylene coated or nuclear grade low chlorine and low sulfur versions are available.
Hot Tags: graphite roll material, China graphite roll material manufacturers, High purity Graphite Roll, Corrosion Resistant Graphite Roll, Graphite Roll Material, graphite roll
