Technological watch

[Problem] To provide an environmentally friendly polyolefin resin film which, as a product, fluctuates little in biomass ratio, has few defects, and thereby gives packaging materials with a low reject rate. [Solution] A method for producing a polyolefin resin film, the method comprising: a step in which masterbatch pellets comprising plant-derived, linear, low-density polyethylene and a polypropylene homopolymer and/or a propylene/?-olefin random copolymer are transferred to a mixing hopper; a step in which the mixed pellets are transferred to a standby hopper and then to an extruder; a step in which the mixed pellets are melt-kneaded with the extruder; and a step in which a molten resin sheet is extruded from the extruder and cooled with a cooling roll to form an unstretched sheet.