FIELD: packing. SUBSTANCE: sack is made of cloth 1 formed by monoaxially stretched single-layer polymeric, poliolefin or polypropylene bands, preferably. Cloth can be coated at one or two sides with artificial thermoplastic material, polyolefin in particular. Cloth is made in form of sleeve or plane cloth turned into sleeve. Cloth ends of one end of sack are folded into rectangle to form surface of bottom. One end of sack, in particular bottom surface, is connected with cover sheet 3 made of cloth through intermediate layers made of thermoplastic artificial polyolefin materials by heating. Cloth is made of monoaxially stretched polymeric polyolefin and preferably polypropylene bands. Surface zone from outside is less than 30% of thickness of material of bottom plane cloth bands, and cover sheet has polymeric, polyolefin and preferably polypropylene molecules disoriented owing to heat treatment. In the rest of zone of material molecules are oriented. Invention provides description of method of welding cover sheet onto sack bottom surface. EFFECT: reduced cost of making. 33 cl, 15 dwg
