Method for preparing low-odor polyethylene resin composition for plastic closure and Article Produced with the Same

摘要

A preparation method of a polyethylene resin composition for a bottle cap of the present invention, as a method of preparing the polyethylene resin composition by copolymerizing ethylene and alpha-olefin in the presence of a solid catalyst including Si, Ti and Mg, comprises performing a degassing process of at least three stages or more on the polyethylene resin composition, wherein the degassing process of the three stages or more has a first stage pressure of 1.2 to 1.5 atmospheric pressure, a second stage pressure of 1.1 to 1.3 atmospheric pressure, and a third stage pressure of 0.9 to 1.1 atmospheric pressure. The polyethylene resin composition has less than 10 ppm of a content of a hydrocarbon having 2 to 10 carbon atoms, exhibits low bad odor characteristics with a smell index of 2.0 or less, and does not generate an unpleasant smell such that the polyethylene resin composition can maintain intrinsic smell characteristics of the beverages when the polyethylene resin composition is applied to the bottle cap for beverages.