Graphite Soft Felt
- Reliable Insulation for High-Temperature Furnaces: Graphite soft felt is designed to deliver dependable thermal insulation in demanding furnace environments, helping maintain stable operating conditions in vacuum furnaces, heat treatment furnaces, crystal growth furnaces and other high-temperature industrial systems.
- Flexible Structure for Easier Installation: Its soft and adaptable structure allows it to fit curved surfaces, corners and complex furnace layouts more easily, making it a practical choice for customers requiring efficient installation and better coverage in customised thermal systems.
- Low Thermal Conductivity for Improved Energy Efficiency: The material helps reduce heat loss and improve thermal efficiency, supporting more consistent temperature control and contributing to lower energy consumption in high-temperature processing applications.
- Stable Performance and Long Service Life: Built for repeated use in severe thermal conditions, graphite soft felt maintains reliable insulation performance over time, helping customers improve furnace durability and reduce maintenance or replacement frequency.
- Available in Custom Sizes and Thicknesses: To meet different furnace design requirements, graphite soft felt can be supplied in a range of thicknesses, widths and cut-to-size formats, offering greater flexibility for OEM projects and replacement insulation needs.
Description
Introduction to Graphite Soft Felt
Graphite soft felt is a flexible thermal insulation material used in vacuum furnaces, heat treatment furnaces, crystal growth furnaces and other high-temperature industrial systems. It is valued for its low thermal conductivity, good flexibility and stable performance in demanding thermal environments, where reliable heat retention is essential.
By helping reduce heat loss and improve temperature stability, graphite soft felt supports better thermal efficiency and more consistent furnace operation. It is widely used in applications that require lightweight, adaptable insulation capable of fitting complex furnace structures and maintaining dependable performance over extended service cycles.
What Is Graphite Soft Felt?
Graphite soft felt is a soft, lightweight and flexible insulation material made from carbon fibre felt that has been further heat treated to achieve graphite properties. It is designed for use in high-temperature furnace systems where efficient insulation, easy installation and reliable long-term performance are required.
Because of its flexible structure, graphite soft felt can be fitted around curved surfaces, corners and complex thermal zones more easily than rigid insulation materials. This makes it a practical choice for furnace linings, hot zones and other applications where both thermal performance and installation adaptability are important.
Manufacturing Process
Graphite soft felt is produced from fibre-based felt that undergoes controlled high-temperature treatment to form a carbon material, followed by further graphitisation to improve its thermal stability and high-temperature performance. Depending on the raw material system and processing route, the final product can offer different balances of flexibility, purity, thermal conductivity and service life.
Additional purification and finishing processes may also be applied to meet the requirements of specific furnace environments, especially where low ash content, cleaner operation or more demanding thermal conditions are involved.
Comparison with Rigid Graphite Felt
Both graphite soft felt and graphite rigid felt are used for high-temperature furnace insulation, but they serve different needs.
Graphite soft felt is preferred where flexibility, easier fitting and better coverage of irregular or curved surfaces are important. It is well suited to furnace areas that require lightweight insulation and simpler installation.
Graphite rigid felt is typically chosen where greater dimensional stability, structural strength and shaped insulation components are needed. It is often processed into boards, cylinders or custom rigid parts for furnace designs that require a more fixed and durable insulation structure.
For many furnace systems, soft felt and rigid felt are used together to achieve the right balance of thermal insulation, structural support and installation efficiency.
Types of Graphite Soft Felt
PAN-Based Graphite Soft Felt
PAN-based graphite soft felt is often selected for furnace systems that require a balance of thermal insulation performance, mechanical strength and stable operation under demanding conditions. It is suitable for a range of high-temperature industrial applications where durability and reliable insulation are both important.
Rayon-Based Graphite Soft Felt
Rayon-based graphite soft felt is valued for its good flexibility, high purity potential and effective thermal insulation performance. It is widely used in furnace environments where clean operation, lightweight insulation and consistent high-temperature stability are required.
Key Features & Benefits
Reliable Insulation for High-Temperature Furnaces
Graphite soft felt provides dependable thermal insulation in high-temperature furnace systems, helping maintain stable operating conditions in demanding thermal processes.
Flexible and Easy to Install
Its soft and adaptable structure makes it easier to fit around curved surfaces, corners and complex furnace layouts, improving installation efficiency in customised thermal systems.
Low Thermal Conductivity
The material helps reduce heat loss and improve furnace thermal efficiency, supporting more consistent temperature control during operation.
Stable Performance and Long Service Life
Graphite soft felt is designed to maintain reliable insulation performance during repeated heating cycles, making it suitable for long-term use in high-temperature environments.
Available in Custom Sizes and Thicknesses
It can be supplied in a range of thicknesses, widths and cut-to-size formats to match different furnace designs, replacement needs and OEM requirements.
TAICHIRON@ Series Soft insulation
| Product | Bulk Density | Thermal Conductivity (@1000℃) |
Ash Purification |
Operating Temperature |
Available Sizes |
| PAN-Based | 0.13g/cm³ | 0.2W/(m.k) | ≤20ppm | ≥2000℃ | 10x1200*20000mm 5x1200*20000mm |
| PAN-Based | 0.15g/cm³ | 0.15W/(m.k) | ≤20ppm | ≥1800℃ | 3x1500*20000mm 10x1200*20000mm |
| Viscose-Based | 0.12/cm³ | 0.13W/(m.k) | ≤20ppm | ≥2200℃ | 3x1200*27000mm 5x1200*27000mm 10x1200*27000mm |
Applications For Graphite Soft Felt
Vacuum Furnaces
Graphite soft felt is widely used in vacuum furnaces and other high-temperature furnace systems where efficient insulation and stable thermal control are essential. It improve furnace efficiency and support uniform temperature distribution .
Heat Treatment Furnaces
In heat treatment processes, graphite soft felt supports consistent thermal insulation performance, helping maintain stable furnace conditions for improved process control and product quality.
Crystal Growth Furnaces
Graphite soft felt is also used in crystal growth furnace systems, where dependable thermal management and stable insulation are required for controlled high-temperature operation.
Industrial Thermal Systems
Beyond these applications, graphite soft felt is suitable for a range of industrial furnace and thermal processing equipment where lightweight, flexible and high-temperature insulation materials are needed.
Why Choose SHJ CARBON
We offer a variety of transmission components
26+ Designed for Furnace Insulation Applications
Our graphite soft felt is developed for use in high-temperature furnace systems where reliable insulation, stable operation and long service life are important.
Flexible Supply for Different Furnace Requirements
We offer a range of thicknesses, sizes and processing options to support replacement projects, OEM requirements and customised insulation solutions.
Support for Custom Processing
Custom cutting, shaping and additional finishing options are available to help customers match specific furnace structures and insulation needs more effectively.
Purification and Secondary Processing Available
Where required, additional purification and heat treatment options can be provided to support cleaner operation and more demanding thermal environments.
Surface Treatment & Customization Options
SHJ CARBON offers a range of surface treatments and customization options to meet your specific operational requirements:
- Edge Sealing – Prevents particle shedding and improves material integrity.
- Corrosion Protection – Specialized coatings that enhance the material's resistance to chemical damage in harsh environments.
- Laminated Graphite Foil Layers – Adds extra strength and heat resistance, perfect for more demanding applications.
- 3D Shaped Processing – Custom-made to fit complex furnace geometries or specialized heat shield designs.
- Custom Finishes for Different Applications – Tailored surface treatments to enhance durability, energy efficiency, and performance.
FAQs – Graphite Soft Felt
1. What is graphite soft felt used for?
Graphite soft felt is used as a thermal insulation material in vacuum furnaces, heat treatment furnaces, crystal growth furnaces and other high-temperature industrial systems. It helps reduce heat loss and improve furnace thermal efficiency.
2. What is the difference between graphite soft felt and graphite rigid felt?
Graphite soft felt is flexible and easier to install in curved or complex furnace structures, while graphite rigid felt offers greater dimensional stability and is often used in shaped insulation parts such as boards or cylinders. if want to get more info please click to How to Choose Between Graphite Soft Felt and Rigid Graphite Felt for Vacuum Furnace Insulation
3. Is graphite soft felt suitable for vacuum furnaces?
Yes. Graphite soft felt is widely used in vacuum furnace insulation because of its low thermal conductivity, high-temperature stability and flexible structure.
4. Can graphite soft felt be supplied in custom sizes?
Yes. It can be supplied in different thicknesses, widths and cut-to-size formats to match specific furnace designs and installation requirements.
5. How long does graphite soft felt last?
Service life depends on operating temperature, furnace atmosphere, installation quality and maintenance conditions. Under suitable operating conditions, graphite soft felt can provide reliable insulation performance over extended use.
Get in Touch – Request a Quote
Looking for a flexible insulation material for vacuum furnaces or other high-temperature furnace systems? Get in touch with us to discuss your operating requirements, preferred dimensions and custom processing needs.
We can support standard and customised graphite soft felt solutions for a wide range of industrial furnace insulation applications.
Request a quote today for graphite soft felt specifications, sizes and custom processing options.
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