Bulletproof formed part and preparation method thereof

Abstract

The invention discloses a bulletproof formed part comprising at least two barrier layers and buffer layers between every two barrier layers, wherein the barrier layers and the buffer layers comprise aplurality of superposed weftless fabrics; the weftless fabrics comprises fibers of which the strength is at least 15 cN / dtex and the modulus is at least 390 cN / dtex; in each buffer layer, the anglesformed by the fibers in the adjacent weftless fabrics are 40-60 DEG; and in each barrier layer, the angles formed by the fibers in the adjacent weftless fabrics are 85-95 DEG. The invention also provides a preparation method of the bulletproof formed part. The barrier layers can effectively reduce the bullet speed due to the high strength, and the buffer layers are beneficial to the absorption andthe diffusion of the kinetic energy of the bullets due to the same property in all directions; and therefore, under the alternate actions of the barrier layers and the buffer layers, the bulletproofformed part has favorable bulletproof function and can protect the user from being hurt by bullets when used as a bulletproof helmet or bulletproof vest.

Description

technical field [0001] The invention relates to personal protective equipment, in particular to a bulletproof molded part and a preparation method thereof. Background technique [0002] Bulletproof vests and bulletproof helmets are personal protective equipment worn in order to ensure the survival of people in specific environments. They can absorb and dissipate the kinetic energy of warheads and shrapnel, prevent penetration, and effectively protect the protected parts of the human body. [0003] Although the protection level of traditional steel materials can meet the bulletproof requirements, due to the shortcomings of steel materials such as heavy weight, too strong rigidity and poor comfort, not only will the wearer's mobility be restricted, but also there will be bouncing injuries. danger. With the continuous advancement of material science, the advent of high-tech synthetic fibers such as aramid fiber (Kelar) and ultra-high molecular weight polyethylene (UHMWPE) fibe...

AI Technical Summary

Problems solved by technology

As bulletproof parts, when the fiber becomes (0 / 90°) n At this time, although the bulletproof parts can inherit the strength performance of the fiber to the greatest extent, due to the low elongation of the composite material in this fiber arrangement, the performance of buffering the kinetic energy of the bullet is poor. Due to the effect of anisotropy, the bullet’s The stress wave only transmits in two directions, which is not conducive to the absorption and diffusion of energy, thus reducing the bulletproof performance of the body armor

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