RECYCLABLE PAPER PACKAGING WITH HIGH BARRIER PERFORMANCE AGAINST WATER VAPOUR AND OXYGEN Russian patent published in 2023 - IPC B65D65/40 B32B27/10 B32B7/12 

FIELD: containers.

SUBSTANCE: recyclable multilayer paper container material with a high barrier characteristic against water vapour and oxygen. The material consists of paper layer (2) with paper with a surface density from 30 to 360 g/m², and barrier film (3) attached to it, wherein barrier film (3) includes at least substrate layer (4), connecting layer (5), and barrier layer (6), wherein connecting layer (5) is placed between substrate layer (4) and barrier layer (6), such that substrate layer (4) predominantly consists of polyethylene or polypropylene with a proportion of polyethylene or a proportion of polypropylene at least 60 wt.% of substrate layer (4), that at least one layer (4) of barrier film substrate (3) is elongated, that the proportion of paper layer (2) is from 50 wt.% to 90 wt.% of multilayer material (1) of the paper container, and that barrier film (3) is connected to paper layer (2) by hydrophilic adhesive layer (9), and the side of paper layer (2) facing barrier film (3) is uncovered.

EFFECT: invention provides for creation of a recyclable multi-layer paper container material made from paper with a high barrier characteristic against water vapour, oxygen, and/or odours, which can be obtained in a simple way and which is well-suited for recycling.

11 cl, 3 dwg