LAMINAR PAPER, METHOD OF ITS MAKING AND METHOD OF MAKING 3D CONTAINERS Russian patent published in 2014 - IPC B32B29/08 B65D65/40 

FIELD: process engineering.

SUBSTANCE: invention relates to pulp-and-paper industry, particularly, to production of laminar paper and containers made thereof. Proposed material comprises one 3d-structure paper sheet with raised sections that have maximum sizes smaller than initial sheet width. Raised section is produced by local stretching of the first sheet with initial degree of stretchability in all directions of at least 5%. Besides, it comprises at least one second paper sheet with initial degree of stretchability in all directions of at least 5% secured to said first paper sheet. Note also that said raised section forms vacancies in laminar material.

EFFECT: laminar paper of high bending strength in all directions.

11 cl, 11 dwg