Ethylene copolymer with improved hygienic property and process for preparing the same
AssigneeSK Innovation Co., Ltd.
InventorsSeung Bum KWON, Se Won OH, Hyeong Taek HAM, Choon Sik SHIM, Sung Seok CHAE, Dae Ho SHIN
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Abstract
Provided is an ethylene copolymer having improved hygienic property. More particularly, the ethylene copolymer satisfies a correlation between a density thereof and an extract content. The ethylene copolymer having improved hygienic property can be applied in injection molding, rotation molding, or blow molding.
Claims11
An ethylene copolymer obtained by polymerization of ethylene and a(C3-C18) α-olefin co-monomer, the ethylene copolymer being injection-moldable, wherein the ethylene copolymer has a density of 0.91 to 0.94 g/cm3 and a melt index (MI) of 3 to 50 g/10 min, and satisfies Formulas 1 and 2 below:
- S≧(8×1056)×e−144.1D [Formula 1]
- S≦(3×1025)×e−61.8D [Formula 2]
- in Formulas 1 and 2, S represents an extract content of the ethylene copolymer at 35° C. after 10 minutes as measured by temperature rising elution fractionation analysis using 1,2,4-trichlorobenzene as a solvent, and D represents a density of the ethylene copolymer.
Dependencies are inferred from the claim text.