Bulletproof Vest consists of two parts: a coat cover and a bulletproof layer. Needless to say, the ballistic layer is the key, which effectively protects the human body and the parts it wants to protect by absorbing and dissipating the kinetic energy of the warhead or shrapnel and preventing it from penetrating. Think about it, our human body is very fragile, and the soft flesh can't block the damage of sharp weapons, so we need to use external forces to protect ourselves. From ancient times to the present, people have a sense of self-protection, and the people of the primitive people know how to use natural fibers to weave and wear them on the chest to resist external damage, which is the prototype of Bulletproof Vest. With the progress of the times, weapons are becoming more and more diverse, and the lethality is also increasing, therefore, the requirements for protection are getting higher and higher, and various Bulletproof Vest has come into being. At the end of the 19th century, the first Bulletproof Vest appeared, produced in the United States, consisting of 4 layers of silk fibers that could withstand most low-velocity bullets. During World War I, due to the limited bulletproof capacity of this silk Bulletproof Vest and the high price of silk fabrics, they chose metal Bulletproof Vest. However, this kind of Bulletproof Vest is a hard material, which is prone to secondary injury, and it is relatively thick and heavy, which restricts people's flexible movement on the battlefield, so there is a new bulletproof material - high-performance fiber. As an important personal protective equipment, Bulletproof Vest has undergone important material changes: from metal armor protective plates to non-metallic synthetic materials, from simple synthetic materials to synthetic materials and metal armor plates, ceramic guards and other composite development.
