The invention relates to the technical field of
body armor, and discloses an outer protective layer. The auxetic structural layer comprises an upper functional layer, a middle functional layer and a lower functional layer from outside to inside, a plurality of polygonal concave buffer grooves distributed at equal intervals are formed in the auxetic structural layer, and the buffer grooves of the auxetic structural layer are filled with shear thickening liquid; when the
body armor is impacted by external force, the groove wall
fiber network of the multilateral concave buffer groove buffers the external
impact force through stretching deformation, the shear thickening liquid is thickened, and the
fiber network around the damage bearing part of the
body armor is locked to form a local rigid supporting area; the inner protective layer and the auxetic structure layer are located between the outer protective layer and the inner protective layer, the beneficial effects of being excellent in synergistic protective performance, uniform in
impact energy dispersion and capable of assisting
nursing are achieved, and the problems that a traditional body armor is limited in
energy absorption efficiency, blunt injuries are easily caused by
impact stress concentration, and the service life is long are solved. The auxiliary
nursing function of the injured part is lacked, and
primary treatment cannot be carried out on the wound in time.