PACKING MATERIAL AND PACKING CONTAINER Russian patent published in 2020 - IPC B65D65/40 B32B5/18 B32B23/08 

FIELD: packaging industry.

SUBSTANCE: invention relates to packaging materials for use in containers for liquid or semi-liquid food products and relates to packaging material and packaging container. Packaging material comprises a decorative layer, a three-dimensional layer arranged on one side of the decorative layer, a barrier layer arranged on the side of the three-layer layer, opposite to the decorative layer, and a heat-sealable layer arranged on the side of the barrier layer opposite to the volume layer, so, that the volume layer is located between the decorative layer and the barrier layer, wherein the barrier layer is located between the volume layer and the heat sealable layer, wherein the bulk layer has a density less than 700 kg/m³ and is formed by at least 25 % of the thickness of the bulk layer of crosslinked foamed fibrous cellulose.

EFFECT: invention provides creation of packing material, in which foamed or porous, or air-filled fibrous volumetric layer withstands lamination with heating and under pressure without loss of its initial thickness during lamination, providing proper base thickness of final multilayer material with low density of bulk material, as well as mechanical strength with respect to resistance to delamination and compression density.

18 cl, 12 dwg