FIELD: production of high-strength multilayer polymeric material. SUBSTANCE: in the method of production of multilayer polymeric material for internal reinforcing layer with a fibrillar structure use is made of material consisting of a mixture of high-density polyethylene and low-density polyethylene. The high-density polyethylene has a molecular weight considerably exceeding the molecular weight of the low-density polyethylene. The low-density polyethylene is selected from a group of copolymers and/or branched polyethylenes possessing similar or higher elongation at a rupture at a room temperature and slow extension than the high-density polyethylene. The mentioned copolymers and/or branched polyethylenes possess also an ability of appreciable ply separation from the high-density polyethylene at formation of a precise microphase at cooling of fused homogeneous mixture of material components of the internal layer. Besides, the material of the interval reinforcing layer additionally contains polyperfluoro-propylene with a molecular weight that is considerably less than the molecular weight of the high-density polyethylene. The material of the internal reinforcing layer additionally contains a small amount of fusing agent. Copolymer of propylene and polyolefin containing at least four atoms of carbon is used as fusing agent. After a two-axial stretching the material is subjected to thermal treatment for its shrinkage at least by 7% in one direction. EFFECT: facilitated procedure. 4 cl, 1 tbl
