FIELD: metallurgy.
SUBSTANCE: invention relates to a polyethylene composition for injection molding, which is well-treatable. Polyethylene composition is multimodal and has density from 0.950 to 0.970 g/cm3, MIE from 1 to 30 g/10 min, ratio MIF/MIE from 15 to 30 and values of rheological polydispersity ER from 0.40 to 0.52. MIF is a melt flow index at 190 °C with weight of 21.60 kg, and MIE is a melt flow index at 190 °C with weight of 2.16 kg.
EFFECT: polyethylene composition according to the invention has an improved balance of resistance to stress cracking (FNCT) and impact strength (Charpy) in combination with low warping and easy processing.
6 cl, 1 dwg, 1 tbl, 5 ex
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