FIELD: recovery of polymers; manufacture of reservoirs for industrial and domestic applications. SUBSTANCE: polythene or polypropylene granules are melted in evacuated mold provided with heaters at temperature higher than melting point by 50-70 C and cooled under specified conditions. Then melt is seasoned till complete deaeration and cooled down stepwise in vacuum each time reducing temperature of heaters by 20-30 C; next reduction of heater temperature is made upon equalizing temperature throughout volume of manufactured reservoir. EFFECT: reduced cost of manufactured products.
