FIELD: chemistry.
SUBSTANCE: invention relates to films containing polyolefin, containing 31 to 38 wt. % propylene-ethylene copolymer containing from 3.1 to 4.3 wt. % ethylene derivatives and from 62 to 69 wt. % propylene-ethylene-1-butene terpolymer containing from 2.1 to 3.7 wt. % ethylene derivatives and from 6.8 to 9.5 wt. % 1-butene derivatives, wherein each of said copolymers is obtained using a heterogeneous bismuth-containing catalyst.
EFFECT: films made from said composition are characterized by high transparency and uniform thickness.
1 cl, 4 tbl, 1 dwg
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