Factors influencing the comfort of body armor―ballistic

Comfort is an important indicator of body armor, including moisture permeability, breathability, softness, and lightness. Through reasonable structural design, soft body armor can have better flexibility and lightness. If you want to balance comfort at the same time, you need to ensure that the body armor is light, comfortable and protective. The bulletproof materials, protective area and structural design used directly determine the protective capabilities, weight, wearing and performance of bulletproof vests. The following Anhua police equipment will talk to you about the fibers and materials used in body armor! Fibers and materials are the primary factors for weight loss and wearability improvement of body armor. The substantial improvement in breathability and softness helps the wearer to react and move quickly when in danger. At present, bulletproof clothing is developing toward better protective fibers and lower costs. The development of new materials and the application of new technologies are the driving forces for its development. The decisive factor for improving the protective performance of military bulletproof vests and reducing weight is bulletproof materials. Therefore, the selection of mature, high-quality, high-strength, soft and lightweight materials is an important way to achieve weight loss and ensure comfort. 1. A new generation of Kevlar aramid fiber: Kevlar AS450X is a new generation of aramid product that solves multiple security threats, especially developed for wearers to wear body armor more comfortably. This product has developed protective equipment that combines stab resistance, nail protection, and bullet resistance into one body. While providing good comfort, it also exhibits significant maneuverability, especially when driving on patrol vehicles. According to market research, body armor also needs to be waterproof. Kevlar XPS104 fabric has excellent elasticity and comfort even in wet conditions, especially suitable for tropical climates or extremely humid occasions. 2. Ultra-high molecular weight polyethylene fiber: In the 1990s, the United States realized the commercial production of ultra-high modulus polyethylene fiber with the trade name 'Spectra'. The amount is the fiber spun from polyethylene with a molecular weight of 1 to 5 million. Under the condition of maintaining the same protection performance as Kevlar products, the weight of bulletproof helmets and vests made of this fiber material can be reduced by 1/3. The ultra-high modulus polyethylene fiber is resistant to chemical corrosion and abrasion; the density is very low, with excellent mechanical properties and energy absorption properties; the fiber density is the smallest of all high-performance fibers, which can greatly reduce the physical strength of workers. 3. Spider silk: Spider silk is currently the most tough and elastic fiber in the world and belongs to the biological protein fiber. It has the best structure produced in nature, and has high anti-breaking strength and excellent comprehensive performance: tough texture, strong strength, good elasticity, softness, light weight and other advantages, and can be biodegradable and recycled. It is used in aerospace (such as structural materials, composite materials, aerospace clothing for aircraft and satellites), military (such as tank armor, body armor, parachutes), construction (such as structural materials for bridges and high-rise buildings), medicine (such as artificial joint , Tendons, ligaments) and other fields have shown broad application prospects. 4. Carbon nanotubes: Carbon nanotubes are empty graphite cylinders with only one atomic thickness. It is similar in structure to polymer materials, but its stability is much higher. If it is made into a composite material, it can have good strength, elasticity, fatigue resistance and isotropy; it can improve the engineering characteristics of ultra-high molecular weight polyethylene and strengthen its heat dissipation, made of such materials The body armor can not only withstand greater impact, but also be more breathable, lightweight and comfortable. With the advancement of biotechnology, tough materials like spider silk are likely to be produced in large quantities through genetic modification or synthetic methods. The development of nanotechnology will also enable the development of flexible and strong bulletproof materials. At present, the high-performance fibers commonly used as the matrix of composite materials mainly include carbon fibers, aramid fibers, ultra-high molecular weight polyethylene fibers, and glass fibers. These high-performance fibers and fiber-reinforced resin can be compounded into a bulletproof composite material with more superior performance, which has the advantages of light weight, good flexibility and good protection effect. V. Shear thickened liquid bulletproof clothing: Shear thickened liquid STF bulletproof clothing is an ultra-concentrated liquid composed of polyethylene glycol and silicon particles. It is filled in the interlayer of traditional body armor or smeared on the surface of the fiber. When a bullet or shrapnel hits this body armor, the liquid inside will instantly transform into a kind of extremely high hardness under the huge pressure of the projectile The substance forms a 'shield'; once the pressure disappears, it quickly returns to a liquid state. The protection reliability of STF bulletproof clothing is greatly enhanced, the weight is lighter than the current products, the production cost is greatly reduced, and it has good development prospects.