Investigation of the Effect of Rubber Based Offset Ink printed on packaging Cardboard on the Strength Properties of Packing Cartons

Abstract

Paperboards show different behaviors due to their structures. For example, if the paperboard thickness increases its strength increases. Different applications can affect paperboard structure especially coatings and inks. Because of this reason, in this study, the effect of offset printing ink on cardboard strength was investigated. In order to control the ink coated paperboard strength properties after printing, different types of paperboards were used with different grammage, thickness and surface properties. Paperboard samples were 1-ply, 2-ply, 3-ply and 5 different grammages as 215, 240, 250, 290 and 350 g/m 2 .All samples were printed with a one-unit offset printing machine. After drying, tensile, elongation, stiffness, tear and bursting tests were performed on the both printed and unprinted paperboards according to TAPPI standards. The paperboards showed different behaviors according to the applied tests. Some of them show significant changes, but some of them do not. The printed and unprinted sample values were compared only for the same paperboard grades.

Analytical Determination of the Bending Stiffness of a Five-Layer Corrugated Cardboard with Imperfections

“…Both models consist of classic Bernoulli 2-node beam elements and were implemented in Matlab software (Mathworks Inc., Natick, MA, USA) [65]. Small rotation φ was applied in both ends and the corresponding reaction moments M were determined in order to calculate BS from Equations ( 13) and (16). In all cases, displacements resulting from φ rotation wrt neutral axis were applied on both ends of the model (in external nodes on the left and right sides of the model).…”

“…The task is challenging mainly due to the layered structure of the corrugated cardboard with two characteristic in-plane directions of orthotropy associated with the mechanical strength of the paperboard-the machine direction (MD) perpendicular to the main axis of the fluting and parallel to the paperboard fiber alignment, and cross direction (CD) which is parallel to the fluting. Moreover, there are a number of factors that reduce the strength of a cardboard itself or corrugated cardboard packaging, the impact of which has been analyzed and is still is the subject of investigation, e.g., [3] in particular time and storing conditions [4,5], stacking load [6][7][8], openings, ventilation holes and perforations or indentations [9][10][11][12][13][14], shifted creases on the flaps [15] or imprinting on packaging cardboard [16], e.g., product or seller logos.…”