INFLUENCE OF INITIAL FEEDSTOCK QUALITY AND ADHESIVES ON PACKAGING CORRUGATED BOARD STRENGTH PROPERTIES
Corrugated board is the most common material used for board and paper wrappers. One of the most significant disadvantages of corrugated board is its low wet strength, which makes its application impossible in cases when it is necessary to preserve package integrity in humid environment. The findings of the study of three layer corrugated board were described in the article, the corrugated board samples under study differed in physical and mechanical characteristics of the outer layer, board filler and the corrugation. It is established that the studied samples differ on an indicator of superficial absorbency and it reduces strength properties of a corrugated cardboard therefore selection of a combination of a corrugated layer of paper to a cardboard is necessary for achievement of strong pasting, and also selection of glue with optimum viscosity. Strength properties of a packing corrugated cardboard can be increased considerably when using dry glue on the basis of the modified and natural corn starch. It is shown that regulating a ratio of water and a dry component, it is possible to receive glue with necessary viscosity – optimum for a concrete gofroagregat and the delivered raw materials. It is offered to use a hydrophobic additive which promotes receiving the flat, well stuck together cardboard with the increased moisture strength properties by production of a corrugated cardboard.