MULTILAYER FILM RESISTANT TO LINEAR TEAR PROPAGATION Russian patent published in 2018 - IPC B32B27/08 B32B27/32 B32B27/30 B65D65/40 

FIELD: layered products and materials.

SUBSTANCE: invention relates to a multilayer film used as a packaging material comprising a layer sequence consisting of (a) layer (a), (b) layer (b) and (c) layer (c). Layer (a) consists of at least one polyethylene of low density in the range of from 0.915 to 0.935 g/cm³ or a mixture (α) of at least one polyethylene of low density from 0.915 to 0.935 g/cm³ and (β) at least one homo- or copolymer of an aliphatic C₃-C₆olefin. Layer (b) consists of a mixture (I) of at least one polyethylene of low density from 0.915 to 0.935 g/cm³ and (II) at least one thermoplastic polymer selected from styrene (co)polymers, wherein polymer component II accounts for not more than 50 wt%, based on the total weight of the mixture of polymer components I and II. Layer (c) consists of at least one polyethylene of low density from 0.915 to 0.935 g/cm³ or from a mixture of (α) of at least one polyethylene of low density from 0.915 to 0.935 g/cm³ and (β) of at least one homo- or copolymer of an aliphatic C₃-C₆olefin.

EFFECT: according to the invention, the tearing force of such multilayer film in the longitudinal direction and in the transverse direction thereof is not more than 1000 mN when tested according to the Elmendorf method in accordance with DIN EN ISO 6383-2 with a total thickness of 50 mcm.

29 cl, 1 tbl, 3 ex