| 摘要 |
PURPOSE: An ethylene copolymer is provided to have excellent physical properties like impact resistance, flexural modulus, etc and hygienic properties at the same time through density control of a polyethylene resin, and to use for injection molding, rotation molding and hollow molding. CONSTITUTION: An ethylene copolymer comprises the density is an ethylene copolymer, which is ethylene and (C3-C18) &amp;amp;alpha;-olefin comonomer is polymerized, capable of injection molding, has the density of 0.900-0.960 g/cm^3, the melt index (MI) of 3-50 g /10min, and satisfies the equation 1: S &amp;gt;= (8× 10^56) × e^(-144.1D) and the equation 2: S <= (3× 10^25) × e^(-61.8D). In the equation 1 and 2, S is the extract content of the ethylene copolymer, and D is the density of the ethylene copolymer.
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