MULTILAYER STRUCTURE AND METHOD OF ITS PRODUCTION Russian patent published in 2015 - IPC B32B27/28 B32B27/40 

FIELD: process engineering.

SUBSTANCE: invention relates to multilayer structures used primarily in food packages, various vessels, etc. This structure comprises at least 8 polymer layers and one polymer ply. The latter comprises layer A of polymer composition containing polymer with gas-barrier properties which features oxygen penetration rate measured as described in Japan Industrial Standard JTS-K7126 (isopiestic method) at 20°C relative humidity of 65% at the level of not over 100 ml·20 mcm/(m²·day·atm). It layer B consists of polymer composition containing thermosetting polymer, at least one of polymer compositions included in layer A and layer B adjacent compositions containing metal salt. Note here that content of metal salt makes at least 1 ppm and not over 10000 ppm in equivalent units of metal salt. Note also that adhesion between said layers A and B makes at least 450 g/15 mm. Later A and layer B can be interlaced with one another. Moreover, mean depth of single layer selected from layers A and B makes, preferably, 0.01 mcm and not over 10 mcm.

EFFECT: fine gas-barrier properties preserved at stretching or bending.

21 cl, 11 tbl