METHOD FOR DETERMINING THE DEFORMATION AND THE STRENGTH PROPERTIES OF THE PAPER

UDC 676.017

  • Ergashov Maxamatrasul – DSc (Engineering), Professor, the Department of Mechanical Engineering and Service. Tashkent Institute of Textile and Light Industry (5, Shokhzhakhon str., 100100, Tashkent, Republic of Usbekistan). E-mail: maxamatrasul@bk.ru

  • Babakhanova Khalima Abishevna – DSc (Engineering), Professor, the Department of Technology of Printing and Packing Processes. Tashkent Institute of Textile and Light Industry (5, Shokhzhakhon str., 100100, Tashkent, Republic of Usbekistan). E-mail: halima300@inbox.ru

  • Abdullayev Ulugbek Tulanbayevich – PhD (Engineering), Assictant Professor, the Department of Mechanical Engineering and Service. Tashkent Institute of Textile and Light Industry (5, Shokhzhakhon str., 100100, Tashkent, Republic of Usbekistan). E-mail: abdullaev1975@mail.ru

  • Sadriddinov Akmal Abdullo ugli – post-doktoral student, the Department of Technology of Printing and Packing Processes. Tashkent Institute of Textile and Light Industry (5, Shokhzhakhon str., 100100, Tashkent, Republic of Usbekistan). E-mail: sadriddinov@mail.ru

  • Gromyko Irina Grigor’yevna – PhD (Engineering), Associate Professor, Head of the Department of Printing Production. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: gromyko@belstu.by

DOI: https://doi.org/10.52065/2520-6729-2021-249-2-11-17

Key words: paper, bending strength, deformation, bending stiffness coefficient, bulk density.

For citation: Ergashov M., Babakhanova Kh. A., Abdullayev U. T., Sadriddinov A. A., Gromyko I. G. Method for determining the deformation and the strength properties of the paper. Proceeding of BSTU, issue 4, Print- and Mediatechnologies, 2021, no. 2 (249), pp. 11–17 (In Russian). DOI: https://doi.org/10.52065/2520-6729-2021-249-2-11-17.

Abstract

The article offers methods of theoretical and experimental research to assess the bending strength of paper. The calculation algorithm and the results of numerical experimental studies of the dependence of the bending deformation on the main deformation parameters of the paper are presented. The conducted studies allowed us to obtain data on which the shape of the curve and the numerical values of the deflection of paper samples were determined. It was also established that the vector of the force of its own weight is always directed vertically downwards. If the paper has a uniform structure and volume density, then the force of its own weight will be evenly distributed over the entire volume of the sample. Given the different composition of the paper, it can be noted that the moment of the beginning of the bend and the bending curves will differ. The values of the bending start time, the geometric shape and the coordinates of the bending surface established from the experiment can be used to evaluate the properties of paper and paper products. The proposed method for studying the deformation and strength properties of paper will make it possible to predict its properties at the manufacturing stage, as well as to take into account the possibility of its use in specific printing conditions, which will ensure the production of high quality printing.

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