Fuente: WIPO "tomato" A polyethylene copolymer useful in producing blown films may include: ethylene units; and 0.1 mol % to 15 wt % of C3-C18 alpha-olefin comonomer units, the polyethylene copolymer having: a density of 0.900 g/cm3 to 0.915 g/cm3, a melt index (MI, determined per ASTM D1238-20 at 190° C. and 2.16 kg loading) (12) of 0.5 g/10 min to 1.5 g/10 min. a melt index ratio of 15 to 40, a cross-fractional chromatography (CFC) central cross moment covariance of less than −500K (kg/mol), a CFC correlation of −0.3 or less, a CFC equal halves Tw1-Tw2 of −30° C. or less and Mw1/Mw2 of 2 or greater, and a temperature rising elution fraction (TREF) T75-T25 30° C. to 36° C.