FIELD: chemistry.
SUBSTANCE: composition of polyethylene has a density equal to 948-956 kg/m3, a melt index at an increased shear stress, HLMI, equal to 7-15, a dynamic module of melt elasticity G' at a dynamic frequency, at which the loss module G"=3000 Pa, G'(G"=3000) is 1400-1800 Pa, and the value of Mz/G'(G"=3000) is not less than 900 Da/Pa, where Mz is the z- average molecular weight. In addition, this film has an interaction between the tensile strength in the transverse direction of the film of 15 mcm thick (TTD expressed in units of g/25 mcm) and the impact resistance, when the pointed load falls on a 15 mcm film (I expressed in grams) having a film view TTD>62000/l.
EFFECT: films have an improved balance of mechanical characteristics, in particular tensile strength and impact resistance, in combination with excellent extrudability, melt strength, strength characteristics and barrier characteristics.
13 cl, 2 dwg, 3 tbl
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