Polyimide staple fiber, polyimide filament yarn, polyimide flake filling cotton

Polyimide fiber (Polyimide fibre, PI fibre for short), also known as aromatic polyimide fiber, is one of the organic polymer fibers with excellent comprehensive properties. Together with carbon fiber and aramid fiber, it is considered as the three bottleneck key polymer materials that restrict the development of high-tech industries in China. Due to its excellent mechanical strength, electrical insulation performance and thermal stability, it is widely used in aerospace, military industry, automobile industry, electronics/electrical, textile and clothing and other fields.

-Excellent functional properties -

1, High and low temperature resistance:

The molecular chain of polyimide fiber has excellent cross-linking effect, which can form a tight structure, effectively block heat transfer, and has excellent high and low temperature resistance. It can be used for a long time in the temperature range of -200℃ to 400℃ without brittle cracking or significant performance degradation.

2, Flame retardancy:

Polyimide fiber has self-extinguishing performance, that is, once it leaves the fire source, the flame will be quickly extinguished and it is not easy to re-ignite. It has a high limiting oxygen index, which means it can only be ignited under a relatively high oxygen concentration, so it has excellent flame retardancy.

3, Radiation resistance:

The performance of polyimide fiber remains stable after being exposed to high-energy radiation such as ultraviolet rays and electron beams. This property gives it unique advantages in fields such as nuclear energy industry and space environment that need to withstand radiation.

4, High insulation performance:

Polyimide fiber has good electrical insulation performance, low dielectric constant and stable performance in a wide range. This makes it have wide application value as an insulating material in electrical equipment, wires and cables and other fields.

5, Corrosion resistance:

Polyimide fiber has excellent corrosion resistance to a variety of chemical reagents, such as acids, alkalis, organic solvents and so on.

6, High strength and high modulus:

Polyimide fiber has the characteristics of high strength and high modulus. Its strength can reach up to 5.8-6.3GPa, and its modulus can reach up to 280-340GPa. This property makes it an ideal choice for manufacturing high-strength, high-modulus composite materials.

7, Good spinnability and dimensional stability:

Polyimide fiber has good spinnability and can be conveniently spun into fiber products of various specifications. At the same time, it has good dimensional stability and is not easy to change in size due to changes in external conditions such as temperature and humidity.

8, Low water absorption and unique cross-sectional structure:

Polyimide fiber has low water absorption, which allows it to maintain good performance in humid environments. Its unique cross-sectional structure endows the fiber with excellent performance in filter materials, especially has an absolute advantage in high-temperature flue gas filter materials.

-Wide range of application fields -

1, Aerospace field:

It is used to manufacture aerospace devices, the structural system of aviation wings, seals, fuel pipes and so on. Due to its characteristics of high strength, low density, aging resistance and so on, polyimide fiber can meet the high requirements of materials in the aerospace field.

2, Special equipment field:

It is used to manufacture special equipment wrapping materials, bulletproof vests, explosion-proof suits, protective clothing and so on, which can significantly improve the survival ability and combat effectiveness on the battlefield. It is also used to manufacture key components of special aircraft, tanks and other equipment to improve the performance and reliability of these special equipments.

3, Electronic industry field:

It is used to manufacture electronic components, IC packaging materials, machine covers and so on. Due to its many advantages such as electro-thermal stability, temperature resistance and low thermal expansion coefficient, it can effectively improve the service life and reliability of electronic products.

4, Special protection field:

It is used to manufacture protective products under harsh conditions such as high temperature and strong radiation, such as fire-resistant and flame-retardant clothing, heat insulation felt, flight suits, high-pressure shielding clothing, high-temperature resistant special woven cables and so on. These protective products can protect personnel from harm in harsh environments such as high temperature and strong radiation, and improve operation safety and efficiency.

5, Textile and clothing field:

It can be made into special work clothes, outdoor cold-proof clothing, warm batting, fleece jackets and so on, with excellent warmth retention and comfort. In addition, polyimide fiber can also be used to make sports clothing such as ski suits and mountaineering suits, which can meet the needs of athletes in extreme environments.

6, Automobile manufacturing field

It is used for vehicle body structural materials, interior decoration materials, engine hoods and so on. The use of polyimide fiber can reduce the overall weight of the vehicle and improve the driving stability and protection performance of the vehicle.

7, High-temperature filtration field:

As a filter material for bag dust collectors for exhaust gas treatment in cement production, thermal power generation, metal smelting, waste incineration and other fields. These fields usually produce high-temperature and highly corrosive exhaust gas, which requires high-performance filter materials for filtration and treatment. The high temperature resistance and corrosion resistance of polyimide fiber make it an ideal choice for these fields.

8, Other fields:

It is also widely used in nuclear energy industry, space environment, new architecture, high-speed transportation, ocean development, environmental protection, sports equipment, new energy and other fields.