COVERING PACKING MATERIAL Russian patent published in 2020 - IPC B65D65/00 B65D81/03 

FIELD: package and storage.

SUBSTANCE: cover packing material represents relief sheet made of moulded fibrous materials by waste paper disintegration in a hydraulic pulper using recycled water at concentration of 4–5 %. Loose paper mass is fed into accumulating tank, pump is fed to cleaner of high concentration of mass to remove heavy contaminants and then to turbo separator, where there is cleaning from light inclusions and fine sand. Cleaned mass of fibrous materials is diluted with recycled water till concentration is equal to 1.0–1.2 % and supplied to the vacuum forming machine to form a relief sheet and to compact the layer of fibres to dryness of 25–30 %. Then, the sheet is dried by passing through a drying tunnel to produce the target product.

EFFECT: material has high mechanical strength.

3 cl