Carbon Fiber Felt Production Process

 

Carbon Fiber Felt has a darker color, good conductivity, and can withstand temperatures up to 1300°C. It is often used in long-term high-temperature environments, such as single crystal ingot furnaces, to play a role in heat insulation. The following is a detailed introduction to the production process of carbon fiber felt.

 

1. Carbon Felt impregnation and drying process: After the raw material viscose fiber cloth is screened and inspected, it enters the 1% diammonium phosphate (a highly efficient fertilizer widely used in vegetables, fruits, rice and wheat) aqueous solution configured in the impregnation tank and is immersed in it for 1 hour. After being fished out, it enters the continuous extrusion equipment for extrusion, and the extruded diammonium hydrogen phosphate solution flows back to the impregnation tank. After using natural light energy, it is placed on a drying rack to dry or dried in a dryer.

 

2. Carbon Felt carbonization process: The dried viscose fiber cloth enters the carbonization furnace and is heated to 300°C. The temperature rises slowly at first and then quickly. There are nitrogen pipes at the bottom of the furnace, and nitrogen is introduced into the furnace as a protective gas for product carbonization. Carbonization is the process of removing volatile non-carbon components from the fiber, increasing the carbon content and purity of the product, and forming carbonized fibers with a graphite-like microcrystalline structure.

 

3. activation process: The carbonized viscose fiber cloth is heated to about 1400℃ (furnace temperature) for activation, and the activated product is the crude carbon fiber felt. At the same time, steam is passed through the fiber felt cloth with a high-temperature resistant tube to increase the specific surface area and obtain the finished carbon fiber felt. The so-called activation process is to add a catalyst (such as nitrogen) to increase the number of activated molecules in the entire reaction, making the properties of carbon molecules and atoms more active and more energetic.

 

4. Slitting and Coiling: After the carbon fiber felt after the holes are naturally cooled down, it is cut into corresponding sizes according to sales needs using a slitting machine, a cutting machine, and a coiling machine. After cutting, it is coiled and temporarily stored for sale.

 

 

It belongs to the cellulose fiber, which is mainly used in textiles of various types of clothing and decorative items. It is made of natural cellulose as raw material, processed by pulping, spinning, etc., and feels very soft. After impregnation, the flame retardant properties of the fiber can be improved, and chemical bonds or chelates can be formed between the phosphide and the cellulose molecules, so as to achieve intramolecular cyclization and intermolecular cross-linking, prevent the escape of molecular fragments, and thus improve the yield of the product.