Product Description
Composition and Structure
Polyacrylonitrile pre-oxidized fibers are mainly composed of polyacrylonitrile (abbreviated as PAN). Polyacrylonitrile is a high-molecular polymer formed by the polymerization of acrylonitrile monomers. Its molecular chains contain a large number of nitrile groups (-CN), and this structure endows polyacrylonitrile with some special properties. During the pre-oxidation process, the polyacrylonitrile fibers undergo an oxidation reaction of the nitrile groups under high temperature and in a specific atmosphere, and the structure of the molecular chains changes, forming pre-oxidized fibers with certain thermal stability.
Performance Characteristics
- Excellent Flame Retardant Performance: The Limiting Oxygen Index (LOI) of pre-oxidized fibers is relatively high, generally ranging from 40 to 60. This means that they can effectively prevent combustion even in an environment with a relatively low oxygen content. This flame retardant property is mainly due to the fact that during the pre-oxidation process, the structure of the fibers changes and some structures with flame retardant effects are formed, such as molecular chains with a ladder-like structure. When encountering a fire source, pre-oxidized fibers will not burn rapidly like ordinary fibers but will form a carbonized layer to prevent the spread of the flame.
- Good High-Temperature Resistance: After the pre-oxidation treatment, the fibers can withstand relatively high temperatures. They can maintain good performance in a high-temperature environment of 300 - 500 °C without melting or decomposing. This is because pre-oxidation makes the molecular chains of the fibers more stable and increases the bond energy of chemical bonds, enabling them to withstand high temperatures. In fields such as high-temperature industrial filtration and aerospace heat insulation, this high-temperature resistance plays an important role.
- Relatively Strong Chemical Stability: Polyacrylonitrile pre-oxidized fibers have a certain tolerance to many chemical substances. Their chemical bond structures are stable, and they are not easily damaged by chemical reactions when in contact with chemical reagents such as acids and alkalis. In the filtration applications in the chemical and environmental protection industries, they can come into contact with various chemical solutions and gases while still maintaining their own performance, thus achieving long-term and stable filtration effects.
Processing Performance and Applications
- Good Processing Performance: Pre-oxidized fibers have good processability and can be made into various different products through processes such as textile weaving, knitting, and needling. For example, they can be knitted into fireproof fabrics for making firefighter uniforms and fireproof curtains; through the needling process, pre-oxidized fiber non-woven fabrics can be made for use in high-temperature filtration, thermal insulation and other fields.
- Wide Range of Application Fields:
- Fireproof Materials: Due to their outstanding flame retardant performance, they are widely used in the production of fireproof materials in fields such as firefighting and construction. For example, they are used as filling materials for fireproof doors and firewalls or as fireproof fabrics for building interiors.
- Filtration Materials: They perform excellently in high-temperature filtration and chemical filtration. They can be used to filter dust and impurities in high-temperature exhaust gases or to filter chemical solutions in the chemical process to ensure the filtration effect and the safety of equipment.
- Aerospace Field: They play a role in aerospace heat insulation materials, helping to protect the equipment and personnel inside the aircraft from the impact of high temperatures. Meanwhile, their chemical stability also helps to resist chemical erosion in the space environment.
- Automotive Industry: They can be used for fireproofing and heat insulation of automotive interiors, improving the safety and comfort of automobiles. For example, they are used as heat insulation materials for car seats or as fireproof materials around the engine compartment of automobiles.
Detailed Photos
Certifications
Company Profile
Guangdong Kaidun New Material Co., Ltd. is a technology - oriented enterprise specialized in the research, development, production, and sales of high - performance fiber - based textile products. It operates two production bases, one in Jiangsu Province and the other in Guangdong Province, with its operational headquarters situated in Foshan, Guangdong.
The Jiangsu base, namely Kaidun New Material Jinhu Co., Ltd., features a production workshop covering an area of more than 12,000 square meters and five production lines of needling machines. The Guangdong base, which is Guangdong Kaidun New Material Co., Ltd., is equipped with a 4,000 - square - meter comprehensive office building, a 10,000 - square - meter production workshop, three needling machine production lines, multiple looms, filament - cutting machines, wire - distributing machines, and slitting machines.
The company primarily focuses on developing textile or non - woven products using special high - performance fiber materials such as aramid, pre - oxidized fiber, ultra - high - molecular - weight polyethylene, basalt, polyimide, polyacrylonitrile, and carbon fiber, etc. These products are suitable for various applications including fireproofing, heat insulation, thermal preservation, sealing, weather resistance, reinforcement, cut - resistance, and puncture - resistance. They are widely used in industries such as the protect, aviation, aerospace, marine, automotive, photovoltaic, high - speed railway, firefighting, electrical appliances, chemical engineering, steel - making, thermoelectricity, textile, and plastics.
Guangdong Kaidun is an enterprise with independent R & D, customized production, and design capabilities. Its products are sold both domestically and overseas. In recent years, Kaidun Industrial has been dedicated to the research and development and productization of various new flame - retardant material products, striving to contribute to the national high - tech materials in breaking the foreign blockade. Simultaneously, it has vigorously developed high - tech technologies like intelligent manufacturing to drive the manufacturing industry from "Made in China" to "Created in China".
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