Application Fields Of Aramid Fiber
It is widely used in many fields such as aerospace, automobiles, electromechanical, construction, and sports in my country, and is one of the indispensable materials in future life.
Aviation sector
Aramid fiber has low density, high strength and good corrosion resistance. It can be used to manufacture broadband wave-transparent materials such as missile rocket engine casings, aircraft, spacecraft fuselages, main wings, and tail fins, as well as structural components that can withstand impact forces. The multi-layer honeycomb structure board prepared by impregnating aramid cloth with epoxy resin to form aramid prepreg and directly bonding it to the honeycomb or foam structure has outstanding impact resistance and electromagnetic wave permeability. A super-hybrid composite laminate made of aramid, thin aluminum plates, and epoxy weft-free fabrics that are overlapped and hot-pressed. It has extremely high specific modulus and specific strength, and its fatigue life is 100 to 1,000 times that of aluminum alloy plates. . Can be used on aircraft fuselages and other components. Resin-based reinforced composite materials prepared from aramid fibers are used in aircraft fuselages, which can greatly reduce the overall weight of the aircraft.
Military field
With the development of new military weapons such as chemical weapons and nuclear weapons, more new requirements have been put forward for the performance of military protective clothing: durability, lightness, bulletproof, flame retardant, good environmental adaptability and camouflage, etc. Bulletproof vests and helmets Aramid fibers can replace old nylon vests and tank-style helmets. Adding an appropriate amount of aramid to body armor and helmets can not only make them small in size and light in weight, but also increase the bulletproof performance by 40%. . Soft body armor made of high-grade bulletproof aramid weft-free fabric and high-performance polyethylene film has better bulletproof performance and heat resistance than ultra-high molecular weight polyethylene fiber. Aramid fiber can also be combined with other materials (such as metals, ceramics, etc.) to make various high-strength, impact-resistant explosion-proof cans, bulletproof shields, and bulletproof armor plates. In addition, aramid fiber fabric is pasted on the inner wall of the structure to effectively absorb explosion waves and prevent shrapnel from causing harm to the human body.
construction industry
Aramid fiber fabric has better ductility than carbon fiber. The material itself is lightweight, free and flexible. It is an ideal reinforcing material for construction projects, especially when reinforcing irregularly shaped elements. Because of its softness, it is easy to use when reinforcing edges and corners. No chamfering required. Woven aramid fibers into steel bars can be used as cement-reinforced frames for large buildings. In addition to the advantages of high strength and light weight, it also has the advantages of corrosion resistance and good shear resistance.
Transportation field
Because aramid fiber has low density, can withstand high and low temperatures, and has good adhesion to rubber, it can be used as tire cord for cars or aircraft. Tires made of aramid fiber have the characteristics of light weight, thin tire, low rolling resistance, high tire load-bearing capacity, good wear resistance, cut resistance and puncture resistance, small ground pressure center of gravity movement during tire use, and excellent steering performance. It is good, easy to dissipate heat and not easy to deform, which improves the ride comfort of the car, extends the service life of the tire, and can meet the tire usage requirements of modern supersonic aircraft.
Electronic and electrical fields
Aramid fiber has high strength and modulus, low dielectric coefficient, and good electromagnetic wave transmittance. Under the same stiffness conditions, the thickness of radar antenna shielding plates made of aramid composite materials can be reduced by 30% compared with glass fiber composite materials. %, the electromagnetic wave transmittance is increased by 10%; the laminated substrate made of aramid and epoxy, phenolic, polyimide and other resins has a high linear expansion coefficient matching that of ceramics, and does not expand under the action of thermal expansion and contraction. swell. It will cause cracks and can be used to make special printed circuit boards in surface mounting technology, which is beneficial to the miniaturization and lightweight of electronic equipment.
Utilizing the characteristics of high strength and high temperature resistance of aramid fiber, it serves as the "tension member" in the optical fiber to protect the small and fragile optical fiber from being elongated and deformed when subjected to tension, and will not affect the service life of the optical fiber. Transmission of light. Composite products of aramid fiber and carbon fiber have good processing properties and semiconductor properties, and can withstand high temperatures. They are commonly used in the manufacture of materials used to reduce electric fields in high-voltage equipment. Aramid paper has good insulation properties after being impregnated with insulating paint, and is used as an insulation material for heat-resistant motors when combined with natural mica sheets.
