Don't ignore the impact of printing on the compres

Don't ignore the impact of printing on the compressive strength of corrugated boxes

compressive strength is an important index to evaluate the performance of corrugated boxes. Specifically, when an empty corrugated box is placed three-dimensional, apply pressure evenly on both sides until the maximum pressure that the box can withstand when it collapses. The factors that affect the compressive strength of corrugated boxes include the type of raw materials, carton structure, molding process, logistics factors and so on. Among them, the influence of printing as a part of the molding process on the strength of cartons has been recognized in the industry

in recent years, with the development of printing technology, some enterprises believe that the impact of printing on the compressive strength of cartons is becoming smaller and smaller, even negligible. In this regard, the inspection and quarantine department conducted a special comparative sampling test before and after printing for the compressive strength of corrugated boxes and the matching degree of different materials tested. A group of pre printing and post printing carton samples produced recently were randomly selected from 9 export corrugated box enterprises, with a total of 9 groups. Compared with two samples in each group, the paper, structure, process and storage conditions are the same, The only difference is that one of the samples has been printed by the currently widely used flexographic printing method, while the other has not been printed. The test results show that among the nine groups of data, except for one group of printed cartons, the other eight groups of printed cartons have different degrees of influence on the compressive strength, and the most significant one is that the compressive strength of printed cartons has decreased by 11.9% compared with that before printing. It can be seen that the influence of printing on the compressive strength of corrugated boxes can not be ignored

the inspection and Quarantine Department reminded relevant enterprises to pay attention to the impact of printing on the compression resistance of cartons: first, we should fully understand the performance of the packaged products and the requirements for packaging and transportation, but it is not popular; Second, the company has internationally advanced production equipment. Before production, the printing method, pressure, area, shape, location and other elements shall be determined in advance; The third is to determine the pressure and other data indicators through pre proofing, and estimate the possible impact of printing on the compression resistance of the box with the axial deformation of the paper; Fourth, the selection of raw paper and the improvement of the grade of face paper or corrugated core paper are used to make up for the impact of printing on compressive properties