Injection molded caps or closures, and methods thereof

An injection molded cap or closure having a weld line, wherein the injection molded cap or closure is formed from an ethylene-based resin comprising:

• a high molecular weight component, wherein the high molecular weight component comprises an ethylene/alpha-olefin copolymer having a density of from 0.915 g/cc to 0.940 g/cc and a high load melt index (I21.6) of from 3.0 g/10 min to 12.0 g/10 min;
• and
• a low molecular weight component;
• wherein the ethylene-based resin comprises 50 wt. % to 60 wt. % of the high molecular weight component;
• and
• wherein the ethylene-based resin has:
• a density of from 0.945 g/cc to 0.958 g/cc;
• a melt index (I2.16) of from 1.0 g/10 min to 3.0 g/10 min;
• a molecular weight distribution (Mw/Mn) of from 5.0 to 8.0, where Mw is the weight average molecular weight and Mn is the number average molecular weight;
• and
• a cross-over relaxation time of less than 80 ms.