In terms of bulletproof materials, in order to meet the requirements of China bulletproof jacket products to absorb the kinetic energy of bullets and other projectiles to a greater extent, bulletproof materials need to have high strength, good toughness, and strong absorption capacity. The materials currently used in China bulletproof jacket products, especially the software China bulletproof jacket products, are mainly high-performance fibers. These high-performance fibers are characterized by high strength and high modulus. Some high-performance fibers, such as carbon fiber or boron fiber, have high strength, but due to poor flexibility, low breaking power, difficulty in textile processing, and high price, they are basically not suitable for human body china bulletproof jacket products. Specifically, for ballistic fabrics, its bulletproof effect mainly depends on the following aspects: fiber stretching, fiber elongation at break and work at break, fiber modulus, fiber orientation and stress wave transmission speed, fiber Fineness, fiber assembly method, fiber weight per unit area, yarn structure and surface characteristics, fabric structure, fiber mesh layer thickness, number of mesh layers or fabric layers, etc.

The performance of fiber materials used for impact resistance depends on the speed of fiber breakage and stress wave transmission. The stress wave is required to spread as quickly as possible, and the fracture energy of the fiber under high-speed impact should be as high as possible. The tensile rupture work of a material is the energy that the material has to resist damage by external forces, and it is a function related to tensile and elongation deformation. Therefore, theoretically, the higher the stretch, the greater the elongation deformation capacity of the material, the greater the potential for energy absorption. However, in practice, the materials used in China bulletproof jacket products are not allowed to have excessive deformation, so the fibers used in China bulletproof jacket products must also have a higher resistance to deformation, that is, a high modulus.