Do not ignore the effect of printing on the compressive strength of corrugated boxes

The compressive strength is an important indicator for evaluating the performance of a corrugated box. Specifically, when the empty box of a corrugated box is placed in a three-dimensional manner, the pressure is evenly applied on both sides of the corrugated box until the maximum pressure value that can be endured when the box collapses. Factors that affect the compressive strength of corrugated boxes include the type of raw materials, the structure of the carton, the forming process, and logistics factors. Among them, the impact of printing as a part of the molding process on the strength of carton has been recognized in the industry.

In recent years, with the development of printing technology, some companies believe that the compressive strength of carton is affected by printing less and less, and even negligible. In this regard, the inspection and quarantine department conducted a special comparative sampling test for the compressive strength of corrugated boxes before and after printing. From the nine export corrugated box enterprises, random samples of the most recent production of pre-print and post-print carton samples were collected. In the nine groups, the paper quality, structure, process, and storage conditions were the same for each of the two samples. The only difference was that one of the samples was printed by the currently used flexo printing method, and the other was not printed. The test results showed that, except for the compressive strength of a group of printed cartons, the compressive strengths of the other eight groups after printing had different degrees of influence, and the most significant compressive strength of the post-printed cartons was. A decrease of 11.9% before printing. It can be seen that the impact of printing on the compressive strength of corrugated boxes cannot be ignored.

The inspection and quarantine authorities reminded relevant companies to attach importance to the impact of printing on the compressive performance of the carton: First, it is necessary to fully understand the performance of the packaged product, as well as the requirements for packaging and transportation; second, determine the printing method, pressure, area, and prior to production. Shape, position and other elements; third is to determine the pressure and other data indicators through pre-proofing, to estimate the impact of printing on the compressive performance of the carton; fourth is to make use of raw paper selection, improve the level of paper or corrugated paper to make up for printing Compression performance.