Fiber materials are structured materials formed through textile processing from fibrous substances, and they possess a highly distinctive structure. Unlike conventional continuous media, fiber materials contain numerous interfaces between fibers and between fibers and air. The connections between fibers are very loose, resulting in a unique modulus of elasticity. The pores in fiber materials are naturally formed voids between fibers; these are all through-pores, resulting in a very high effective porosity. Fibers are a form of material with a very high aspect ratio and extremely small diameters, making them prone to bending and deformation. Consequently, fiber materials are highly flexible and exhibit excellent shape adaptability.
High-Performance Carbon Fibers and Their Composites
Carbon fiber, often referred to as the “king of lightweight materials,” combines the high strength of carbon materials with the flexibility and processability of textile fibers. Carbon fibers typically have a diameter of 5–7 micrometers—about one-tenth the thickness of a human hair. Their density is less than one-quarter that of steel, yet their strength is 5–7 times that of steel and more than four times that of aluminum alloys. Additionally, they possess properties such as high-temperature resistance, wear resistance, thermal conductivity, and corrosion resistance. Compared to aluminum alloy structural components, carbon fiber composites can achieve weight reductions of 20% to 40%; compared to steel components, they can achieve weight reductions of 60% to 80%.
Carbon fiber is primarily used as a reinforcing material in composites with resins, metals, ceramics, and carbon to manufacture advanced composite materials. Carbon fiber-reinforced epoxy composite materials possess the highest specific strength and specific modulus among existing engineering materials.
High-Performance Para-Aramid Fibers and Their Composites
Para-aramid fiber (PPTA) is an extremely important strategic material. Its strength is 5–6 times that of steel wire, its specific modulus is 2–3 times that of steel or glass fiber, and its toughness is twice that of steel, while its weight is only about one-fifth that of steel.
It serves both as a load-bearing structural material and as a functional material for heat resistance, ablation resistance, and corrosion resistance. It is currently one of the organic fibers with the largest global production scale, offering excellent properties such as high modulus, high strength, high-temperature resistance, acid and alkali resistance, and light weight.
High-performance para-aramid fibers and their composites are primarily used in optical fiber reinforcement, the automotive industry, aerospace, electrical equipment, rail transportation, military protection, sporting goods, and new energy sectors.
Ultra-High Molecular Weight Polyethylene Fibers and Their Composites
Ultra-high molecular weight polyethylene (UHMWPE) fibers, also known as high-strength, high-modulus polyethylene fibers, typically refer to fibers spun from ultra-high molecular weight polyethylene resins with molecular weights ranging from 1 million to 5 million.
UHMWPE fibers are white in appearance and have a density of 0.97–0.98 g/cm³. They currently hold the world’s highest specific strength and specific modulus, making them the third generation of high-performance fibers following carbon fiber and aramid, as well as the high-performance fiber with the lowest density. Through the production of UD fabric (unidirectional fabric), coated yarns, composite yarns, ropes and nets, and woven fabrics, they are widely used in various fields such as military equipment, the marine industry, safety protection, textiles, sports equipment, medical applications, and construction.
Driven by global geopolitical developments and heightened national security awareness, industries such as military equipment and safety protection have experienced rapid growth, leading to a steady increase in global demand for high-strength, high-performance UHMWPE fibers.
Basalt Fiber Reinforced Composites
Basalt fiber (BF) possesses high strength and stiffness, is resistant to high temperatures and corrosion, and is also lightweight. Compared to other composite materials, it is biodegradable, non-toxic, and environmentally friendly, earning it the reputation as the “green industrial material” of the 21st century. It holds significant application value in sectors such as aerospace, defense, and road transportation.
Post time: Apr-03-2026
