FIELD: manufacturing technology.
SUBSTANCE: invention can be used for production of flexible and semi-rigid packages for food industry and medical products. Polypropylene composition for making an article contains at least 95.0 wt. % of a propylene terpolymer. Propylene terpolymer contains 0.5 to 3.0 wt. % comonomer units derived from ethylene and 5.5 to 15.0 wt. % comonomer units derived from C4-C10 α-olefin. Propylene terpolymer has undergone viscosity breaking and has a melt flow rate MFRfinal (230 °C, 2.16 kg ISO1133) in range of 1.5 to 15.0 g/10 min. Also disclosed is a method of producing a polypropylene composition, use thereof, an article and use of an article.
EFFECT: invention provides a combination of low temperature of the beginning of welding with high strength of the welded joint in a hot state and good optical properties of articles from the polypropylene composition.
16 cl, 4 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| POLYPROPYLENE COMPOSITION | 2018 |
|
RU2753481C1 |
| POLYPROPYLENE COMPOSITION WITH IMPROVED SEALING CHARACTERISTICS | 2019 |
|
RU2754076C1 |
| PROPYLENE COMPOSITION COMBINING A LOW START TEMPERATURE OF WELDING, A LOW TURBIDITY, A LOW CONTENT OF HEXANE SOLUBLE SUBSTANCES, IMPROVED TEAR RESISTANCE AND HIGH MELTING POINT | 2016 |
|
RU2665707C1 |
| POLYPROPYLENE COMPOSITION | 2019 |
|
RU2758954C1 |
| COMPOSITION OF CC RANDOM COPOLYMER WITH IMPROVED BALANCE BETWEEN INITIAL TEMPERATURE OF WELDING AND MELTING TEMPERATURE | 2016 |
|
RU2676711C1 |
| PROPYLENE STATISTICAL COPOLYMER FOR APPLICATION IN FILMS | 2015 |
|
RU2668797C2 |
| MULTILAYER FILM WITH IMPROVED PROPERTIES | 2020 |
|
RU2798967C1 |
| MULTILAYER POLYMER FILM | 2014 |
|
RU2635599C2 |
| COMPOSITION OF HETEROPHASE POLYOLEFIN WITH ENHANCED OPTICAL PROPERTIES | 2018 |
|
RU2768931C2 |
| PROPYLENE COPOLYMER | 2019 |
|
RU2810169C2 |
