FIELD: chemistry.
SUBSTANCE: invention relates to a multilayer polymer film comprising two sealing layers and a polyolefin base layer in the following sequence of layers: a sealing layer - a base layer - a sealing layer, wherein the sealing layer comprises polypropylene and wherein the SL-PP polypropylene sealing layer contains comonomer units derived from ethylene, in an amount of 0.5 to 25 wt %, and, at least, one C5-12alpha-olefin, in an amount of 0.5 to 4.0 mol. %, and the content of the fraction soluble in cold xylene XS is 20 to 60 wt %, and the fraction soluble in cold xylene contains comonomer units produced from ethylene, in an amount of 4 to 50 wt %.
EFFECT: multilayer films of the invention have a lower weld start temperature, along with improved impact strength and tear resistance properties.
11 cl, 3 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| 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 |
| HETEROPHASE POLYPROPYLENE COMPOSITION WITH HIGH FLEXIBILITY AND SOFTNESS | 2019 |
|
RU2754212C1 |
| POLYPROPYLENE COMPOSITION WITH IMPROVED SEALING CHARACTERISTICS | 2019 |
|
RU2754076C1 |
| PROPYLENE COMPOSITION WITH IMPROVED IMPACT RESISTANCE AT LOW TEMPERATURE | 2014 |
|
RU2648673C2 |
| MULTILAYER FILM WITH IMPROVED PROPERTIES | 2021 |
|
RU2805350C1 |
| CATALYST SYSTEM FOR PRODUCING POLYPROPYLENE COPOLYMERS | 2008 |
|
RU2436800C2 |
| POLYPROPYLENE COMPOSITION WHICH COMBINES LOW INITIAL WELDING TEMPERATURE AND HIGH MELTING POINT | 2017 |
|
RU2723096C1 |
| HETEROPHASIC COPOLYMER OF PROPYLENE WITH HIGH MELTING POINT | 2015 |
|
RU2654696C2 |
| PROPYLENE/1-HEXENE COPOLYMER COMPOSITION WITH BROAD HEAT SEALING WINDOW | 2011 |
|
RU2530491C2 |
| PROPYLENE-POLYMER COMPOSITION WITH NUCLEATING AGENTS OF CRYSTALLISATION | 2017 |
|
RU2728551C1 |
