Determination of the optimal cardboard parameter as a factor of packaging production waste minimization

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Repeta V. B., Гаврилишин О. Б., Криховець О. В., Zhydetskyi V. Ts. № 2 (67) 229-238 Image Image

The results of the statistical analysis of the packaging process of 20 orders using five samples of packaging cardboard show that in the case of using some types of cardboard blanks, there is a greater number of stoppages of the flow packaging line. In order to find out the reason for technical stops, the structural indicators of cardboard are determined: thickness, mass of 1 m2, density, looseness and stiffness indicators, with the establishment of a possible correlation between them to determine an indicator that can be used as a prognostic factor in the preliminary assessment of the suitability of packa­ging blanks in the packaging process. The results analysis of determining the structural parameters of the cardboard and the stiffness index show the absence of correlation bet­ween them, which makes it impossible to use the density and looseness indicators of the cardboard as prognostic ones. In addition, microscopic and chemical analyses of plant fibres of the cardboard samples composition are carried out using a digital microscope with 100 magnification and a test solution – phloroglucin. The reagent used gives a characteristic bright red colour as a result of chemical reaction interaction with lignin. The obtained results of microscopic analysis and chemical analyses of cardboard samp­les are correlated with their stiffness indicators. The presence of long-fibre fractions of wood mass and cellulose indicate greater strength of cardboard and, accordingly, stiffness. Therefore, micrographs of the cardboard structure can serve as a template to be compared with subsequent cardboard samples and to create an understanding of the difference in fibre composition between cardboard samples (with a constant range of cardboard mass). In turn, the research shows that the stiffness of the packaging cardboard for the researched packaging process should not be lower than 11 mN×m. Measures related to the preliminary analysis of the cardboard composite composition by fibre with constant grammage limits will avoid multiple technological stops and make the researched packaging process as waste-free as possible.

Keywords: packaging, carton, structural indicators, microscopic analysis, stiffness, waste.

doi: 10.32403/1998-6912-2023-2-67-229-238


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