FIELD: packaging industry.
SUBSTANCE: invention relates to the field of food products packing and concerns packing material and its adaptation for inclusion of cap or cover. Packing material comprises a core material layer having a zone extending radially from the hole edge into the core material layer, wherein said zone has a profile of linearly or nonlinearly decreasing thickness of the core material layer in the direction of the edge of the opening. Core material is made of paper, cardboard or thin cardboard and wherein core material is provided with an outer layer, containing at least one polymer layer on one side and/or is provided with an inner layer, containing at least one polymer layer on the other side of core material layer, as closing the hole and engaged with each other near the hole.
EFFECT: invention provides improved adhesion between layers of packing material, reduced risk of leakage and improved possibility of opening.
15 cl, 11 dwg
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