Compressive strength is an important index for evaluating the performance of corrugated cardboard boxes. Specifically, it refers to the maximum pressure value that the corrugated cardboard boxes can bear when they are placed three-dimensionally. Factors that affect the compressive strength of corrugated boxes include raw material types, carton structure, molding process, logistics factors and so on. Among them, the impact of printing as part of the molding process on the strength of the carton has been recognized in the industry.
In recent years, with the development of printing technology, some companies believe that the compressive strength of cartons is less and less affected by printing, and even negligible. In this regard, the inspection and quarantine department conducted a special comparative sampling test for pre-printing and post-printing on the compressive strength of corrugated cardboard boxes. A group of samples of pre-printed and post-printed cardboard boxes produced recently were randomly selected from 9 export corrugated box manufacturers Compared with two samples in each group, the paper quality, structure, process and storage conditions are the same. The only difference is that one of the samples is printed by the commonly used flexo printing method, and the other is not printed. The test results show that among the 9 sets of data, except for one set of printed carton compressive strength has no effect, the other eight sets of printed carton compressive strength have different degrees of impact, the most significant post-printed carton compressive strength is It fell by 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 department reminds relevant companies to pay attention to the impact of printing on the compression resistance of the carton: first, to fully understand the performance of the packaged products and various requirements for packaging and transportation; second, to determine the printing method, pressure, area, and Elements such as shape and position; three is to determine various pressure and other data indicators through pre-proofing to estimate the possible impact of printing on the carton's compression resistance; four is to use raw material paper selection and improve the grade of face paper or corrugated core paper to compensate for printing The impact of anti-pressure performance.
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