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US 2022/0017665 A1Published application
Polyethylene and Method for Preparing the Same
AssigneeLG Chem, Ltd.
InventorsHa Na Park, Sungho Choi, Hyein Ryu, Sangjin Jeon, Seungmi Lee
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Abstract
In the present disclosure, there are provided a polyethylene having improved low-temperature sealing properties with an increase in the content and molecular weight of a low crystalline polymer, and a method for preparing the same.
Claims18
A polyethylene comprising an ethylene repeating unit and an α-olefin-based repeating unit,
- wherein the polyethylene has a density of 0.916 g/cm3 or more, measured according to ASTM D1505, and has three elution temperatures of Te1, Te2, and Te3 corresponding to elution temperatures of first to third semicrystalline polymer fractions contained in the polyethylene, respectively, in a temperature range of 20 to 120° C. when analyzed by temperature rising elution fractionation (TREF),
- wherein Te2 is lower than Te3 and higher than Te1,
- Te1 is 25 to 30° C., and
- the first semicrystalline polymer fraction has a weight average molecular weight of 200,000 g/mol or more, and is contained in an amount of 5 wt % or more based on a total weight of the polyethylene.
1 more element
Dependencies are inferred from the claim text.