FIELD: polymer compositions.
SUBSTANCE: present invention relates to a composition of multimodal polyethylene for the production of a screw-on cap. The composition of multimodal polyethylene contains from 35 to 65 weight percent of low-molecular polyethylene, from 5 to 40 weight percent of the first high-molecular polyethylene or the first ultra-high-molecular polyethylene and from 20 to 60 weight percent of the second high-molecular polyethylene or the second ultra-high-molecular polyethylene, where the molecular-weight distribution of the composition of multimodal polyethylene is in the range from 10 to 25 according to the definition using gel-penetrating chromatography, the half-period of isothermal crystallization of the composition of multimodal polyethylene at a temperature of 123°C is 7 min or less in accordance with differential scanning calorimetry, and the fluidity length in a spiral mold at a temperature of 220°C is at least 200 mm.
EFFECT: improvement in the recyclability, fluidity, and rigidity of the polymer composition for producing caps.
9 cl, 4 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| PIPE OF MULTIMODAL POLYETHYLENE | 2017 |
|
RU2761951C2 |
| MULTIMODAL POLYETHYLENE PIPE | 2017 |
|
RU2794125C2 |
| MULTIMODAL POLYETHYLENE PIPE | 2017 |
|
RU2722148C1 |
| MIXTURES OF POLYOLEFIN RESINS FOR HIGH RESISTANCE TO CRACKING UNDER STRESS AND GOOD RECYCLABILITY | 2019 |
|
RU2784520C2 |
| HIGH-TECHNOLOGICAL MULTIMODAL ULTRAHIGH MOLECULAR WEIGHT POLYETHYLENE | 2017 |
|
RU2740662C2 |
| HIGH-TECHNOLOGICAL MULTIMODAL ULTRAHIGH MOLECULAR WEIGHT POLYETHYLENE | 2017 |
|
RU2728873C1 |
| CONTAINER MADE OF MULTIMODAL POLYETHYLENE | 2017 |
|
RU2759667C2 |
| REACTOR SYSTEM FOR POLYMERIZATION OF POLYMODAL POLYETHYLENE | 2017 |
|
RU2757917C2 |
| MULTIMODAL POLYETHYLENE FILM | 2017 |
|
RU2757914C2 |
| MULTIMODAL POLYETHYLENE COMPOSITION AND FILM INCLUDING IT | 2017 |
|
RU2759997C2 |
