Product Description
Overview
Polyimide non-woven fabric is a material made from polyimide fibers through non-woven manufacturing processes. It combines the excellent properties of polyimide with the unique structural characteristics of non-woven fabric and plays an important role in many high-tech and industrial fields.
Manufacturing Process
- Fiber Preparation: Firstly, polyimide fibers need to be obtained, which are usually produced through the chemical synthesis methods mentioned before. The synthesized polyimide fibers have specific lengths and fineness to meet the requirements for making non-woven fabric.
- Non-woven Manufacturing Processes:
- Needle-punching Method: Polyimide fibers are laid into a fiber web, and then needles with barbs are used to repeatedly puncture the fiber web. The puncturing by the needles makes the fibers interlock with each other, thus forming the non-woven fabric. The non-woven fabric made by this method has relatively high strength and good flexibility and is suitable for application scenarios that require certain mechanical properties.
- Melt-blown Method: The polyimide polymer is heated to a molten state, and then high-speed hot air jets are sprayed through nozzles, causing the polymer filaments to be stretched in the air and cooled and solidified to form ultrafine fibers. These ultrafine fibers accumulate together to form the non-woven fabric. The non-woven fabric made by the melt-blown method has very fine fiber diameters, a high porosity, and good filtration performance and softness.
- Spun-bonded Method: After the polyimide polymer is melted, it is extruded through spinnerets to form continuous filaments. The filaments are cooled in the air and then laid on a collecting device to form a fiber web. Then, through reinforcement means such as hot rolling, the non-woven fabric is formed. The non-woven fabric produced by the spun-bonded method has relatively high strength and a relatively high production efficiency.
Performance Characteristics
- Outstanding High-Temperature Resistance: Polyimide non-woven fabric can withstand relatively high temperatures, and its long-term service temperature can reach 300 - 500 °C. In a high-temperature environment, its physical and chemical properties can still remain relatively stable and will not experience melting, decomposition and other phenomena like some ordinary non-woven fabrics. This enables it to be widely used in high-temperature fields such as aerospace and electronics. For example, it is used in heat insulation materials for aircraft engines or high-temperature protective components for electronic equipment.
- Good Mechanical Properties: It has certain tensile strength and tear strength. Its strength mainly depends on the manufacturing process and the properties of the fibers. For example, the polyimide non-woven fabric made by the needle-punching method has relatively good tensile and tear resistance due to the tight interlocking of the fibers and can withstand certain external forces without being easily damaged. It can be used in occasions where mechanical pressure needs to be withstood, such as filter screen materials in industrial filtration.
- Strong Chemical Stability: It has a good tolerance to chemical substances such as acids, alkalis and organic solvents. This is because the imide rings in the molecular structure of polyimide make the fibers have stable chemical bonds and are not easily reacted with chemical substances. In the fields of chemical industry and environmental protection, it can be used as corrosion-resistant filter materials or protective materials. For example, it can be used to filter corrosive liquids in chemical workshops or to protect against the splashing of chemical reagents in laboratories.
- Good Filtration Performance: Due to the characteristics of its fiber structure and manufacturing process, polyimide non-woven fabric has good filtration performance. Especially the non-woven fabric made by the melt-blown method has very fine fibers and small and uniform pores, which can effectively filter tiny particles and impurities. It has applications in fields such as air filtration and liquid filtration. For example, it is used as a filtering medium in high-precision air purifiers or to filter liquid medicine in the pharmaceutical industry.
- Excellent Electrical Insulation Properties: Polyimide itself is a good electrical insulation material, and the non-woven fabric made from it also inherits this characteristic. It has a relatively high volume resistivity and an appropriate dielectric constant and can effectively prevent the passage of electric current. In the electronics and electrical appliance fields, it can be used as insulation gaskets, insulation coatings for electric wires and cables, etc., ensuring the safe operation of electrical equipment.
Application Fields
- Aerospace Field: It is used for the thermal protection system of aircraft, heat insulation materials inside the cabin, and the protection of avionic equipment. For example, it is used as the heat insulation material for the re-entry capsule of the space shuttle to resist the high temperature during re-entry into the atmosphere and protect the internal structure of the spacecraft and the safety of astronauts.
- Electronics and Electrical Appliance Field: It is used as insulation gaskets for circuit boards, heat dissipation materials for electronic equipment, and insulation coatings for electric wires and cables. It can improve the performance and reliability of electronic and electrical products and prevent short circuits and overheating.
- Industrial Filtration Field: Relying on its high-temperature resistance, chemical corrosion resistance and good filtration performance, it is used for high-temperature flue gas filtration, chemical liquid filtration, and industrial dust filtration. It plays an important role in industrial fields such as steel, cement, and chemical.
- Environmental Protection Field: It is used as a filtering material in air purification and sewage treatment. It can effectively remove particulate matter and harmful gases in the air as well as impurities and pollutants in water.
- Automotive Industry Field: It is used for the heat shield of automobile engines, insulation materials for automotive electronic systems, and sound-absorbing materials for automobile interiors. It helps to improve the performance, safety and comfort of automobiles.
Detailed Photos
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".
Packaging & Shipping
Audited Supplier 
){kind=link}