RCF Bulk

Temperature Grade

1100℃ (2012℉), 1260℃ (2300℉), 1400℃ (2550℉), 1430℃ (2600℉)


Alumina, Silica

CCEWOOL® Ceramic Bulk Fiber is resistant to chemical corrosion, lightweight, high strength, low thermal conductivity, and high heat storage capacity, effectively saving energy. It also has good thermal shock resistance and can be used in harsh environments.

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CCEWOOL® Ceramic Bulk Fiber is produced by melting high-purity raw materials such as clay grog, aluminum oxide powder, silica powder, and zircon sand in an industrial electric furnace at high temperatures to form a fluid. Then, it is transformed into fiber-like structures through processes like compressed air blowing or spinning with a centrifuge, and collected to create ceramic fiber cotton.

CCEWOOL® Ceramic Bulk Fiber can resist most types of chemical corrosion. They are lightweight, durable, have low heat storage capacity, effectively save energy, and exhibit excellent resistance to thermal shocks, making them suitable for use in harsh environments. CCEWOOL® Ceramic Bulk Fiber serves as a raw material for the production of refractory ceramic fiber blankets, boards, papers, and can also be directly used in various high-temperature applications such as high-temperature insulation and packaging materials.


  • Ultra-Low Shot Content

    Shot content is a crucial factor in determining the thermal conductivity of fibers. Using imported high-speed centrifuges, our fibers achieve ultra-low shot content, demonstrating excellent thermal performance with low thermal conductivity and superior insulation properties in continuous high-temperature environments.

  • Minimal Shrinkage Rate

    Strict control of harmful impurities is essential for reducing thermal shrinkage and enhancing heat resistance. Through rigorous raw material management, we reduce impurity content to below 1%, ensuring low thermal shrinkage and high heat resistance in our fiber modules.

  • Lowest Thermal Conductivity

    Through strict quality control and high-standard production processes, CCEWOOL® minimizes shot content, achieving the lowest thermal conductivity. This provides customers with exceptional insulation performance and more efficient energy-saving solutions.

  • Versatile Applications

    Can be used as raw material for RCF blankets, boards, and paper, or directly for high-temperature insulation and various other high-temperature applications.

Features of Ceramic Bulk Fiber

  • Low Heat Capacity and Low Thermal Conductivity

    CCEWOOL® RCF Bulk has a low heat capacity and low thermal conductivity, which makes it highly effective at minimizing heat transfer and improving energy efficiency in various applications.

  • Excellent Chemical Stability

    This bulk material exhibits excellent chemical stability, ensuring durability and maintaining its insulating properties even when exposed to various chemicals.

  • Excellent Thermal Stability and Resistance to Pulverization at High Temperature

    CCEWOOL® RCF Bulk maintains its structure and performance at high temperatures, resisting pulverization and breakdown. This ensures long-term reliability in extreme heat conditions.

  • No Binders or Corrosive Substances

    The material is free of binders or corrosive substances, making it safe to use and preventing potential damage to equipment or surfaces it insulates.

  • Excellent Thermal Shock Resistance

    CCEWOOL® RCF Bulk can withstand rapid temperature changes without cracking or degrading, providing reliable performance in environments with fluctuating thermal conditions.

  • Lightweight

    This bulk material is lightweight, making it easy to handle and install while still providing effective insulation and protection.

Application of Ceramic Bulk Fiber

Versatile High-Temperature Insulation Solutions for Complex Applications

Raw material for fiber blanket, board, textile and unshaped vacuum formed products;
Fillings for wall lining gap in high temperature furnace, heating device;
Fiber spraying;
Raw material for coatings;
Insulation fillings for corner and complex space.

Specifications & Sizes


Description 1100 1260S 1260 HPS 1400 1430 HZ
Fiber Diameter(μm) 3.0-5.0
Chemical Composition(%)
Al2O3 ≥43 ≥44 ≥44 ≥52 ≥35
SiO2 ≥52 ≥52 ≥55 ≥47 ≥49
ZrO2 - - - - ≥15
Color White White White White White
Shot Content(%) ≤15 ≤15 ≤15 ≤15 ≤12
Packing Braided Bag/ Carton

Custom size are available.Contact Us

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Adhere to Strict Quality Control System

CCEWOOL® products have won a number of authoritative certifications, including rach certification, Fraunhofer laboratory certification and CE certification, which fully prove the excellent quality of our products. These certificates are not only a strong guarantee of the quality of our products, but also ensure a worry-free process for your order. If you need to know more certification details or request relevant certificates, please feel free to contact us!

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    North American
    Warehouse Direct Sales

    Our warehouses located in Charlotte, USA, and Toronto, Canada, are well-equipped with ample stock, enabling us to offer efficient and convenient delivery options to our customers throughout North America