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US 12,612,475 B2Granted
Polyethylene for preparing fiber and preparation method of the same
AssigneeLG Chem, Ltd.
InventorsChristine Jisoo Song, Jiwon Yoon, Yi Young Choi
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Abstract
The present disclosure relates to a polyethylene suitable for preparing fibers with enhanced yellow index and filterability in the spinning process by having improved aging lifetime of the polyethylene, and a preparation method of the same.
Claims12
A polyethylene satisfying the following:
- a melt index measured at a temperature, 190° C., under a load of 2.16 kg according to ASTM D 1238 is 15 g/10 min to 40 g/10 min,
- a melt flow rate ratio (MFRR) is 3 or less, wherein the melt flow rate ratio (MFRR) is calculated by dividing a melt index measured at 190° C. under a load of 5 kg (MI5) by a melt index measured at 190° C. under a load of 2.16 kg (MI2.16),
- a content of alkaline earth metals and transition metals measured by inductively coupled plasma (ICP) spectroscopy is 0.8 ppm or less, and
- a halogen content measured by combustion ion chromatography (IC) is 5 ppm or less.
1 more element
Dependencies are inferred from the claim text.