PROPYLENE-BASED POLYMER COMPOSITION Russian patent published in 2020 - IPC C08L23/12 C08L23/10 C08F210/06 C08J5/18 

FIELD: chemical or physical processes; manufacturing technology.

SUBSTANCE: invention relates to a composition of a propylene polymer for producing films and a film for printing. Propylene polymer composition contains a) from 45 wt % to 74 wt % 1-hexene-propylene copolymer containing from 5.5 to 9.0 wt % links obtained from 1-hexene, b) from 26 wt % to 55 wt % ethylene-propylene copolymer containing from 1.5 to 6.5 wt % links, obtained from ethylene. 1-hexene-propylene copolymer has melt flow index 3.5 to 12.0 g/10 min, measured in accordance with ASTM D 1238, 230 °C/2.16 kg. Ethylene-propylene copolymer has melt flow index from 3.5 to 12.0 g/10 min, measured in accordance with ASTM D 1238, 230 °C/2.16 kg. Quantitative content of a) and b) is 100. From said composition, cast film, biaxially oriented film (BOPP) or multilayer film for printing is produced.

EFFECT: invention enables to obtain films having low welding temperature (SIT), high transparency and receptivity to printing.

14 cl, 6 tbl, 5 ex