According to structural materials, Low price bulletproof jacket divided into: ①Soft body armor. The bulletproof layer is generally made of multiple layers of high-strength and high-modulus fiber fabrics quilted or directly laminated. When bullets and fragments penetrate the bulletproof layer, they will produce directional shear, tensile failure and delamination failure, thereby consuming their energy. ②Hard body armor. The bulletproof layer is usually made of metal materials, high-strength and high-modulus fiber laminates made of resin-based composite materials heated and pressurized, bullet-proof ceramics, and high-strength and high-modulus fiber composite boards. 

Low price bulletproof jacket is used to consume the energy of the projectile mainly through the deformation and fragmentation of the metal material. The bulletproof layer of the high-strength and high-modulus fiber bulletproof laminate consumes the energy of the projectile through delamination, punching, resin matrix rupture, fiber extraction and fracture. The bulletproof layer of bulletproof ceramics and high-strength and high-modulus fiber composite board is used. When the high-speed projectile collides with the ceramic layer, the ceramic layer breaks or cracks and spreads around the impact point to consume most of the projectile’s energy. 

The modulus fiber composite board further consumes the remaining energy of the projectile. ③Soft and hard composite body armor. The surface layer is made of hard ballistic materials, and the inner lining is made of soft ballistic materials. Low price bulletproof jacket is good.
When bullets and fragments hit the surface of the body armor, the bullets, fragments and the hard materials of the surface are deformed or broken, consuming most of the energy of the bullets and fragments. The inner soft material absorbs and diffuses the energy of the remaining parts of the bullets and fragments, and plays a role of buffering and reducing non-penetrating damage. Low price bulletproof jacket is good.