Experimental Determination of the Strengthen Capacity of the Paper and Cardboard Glued Samples for the Production of Book-Magazine Covers and Bindings of Various Forms

Taking into consideration the necessity of the production of the resource-saving and ergonomic book and magazine covers under conditions of the recent highly competitive environment of the printed products distribution and the consumer pricing, the analysis of the conducted research identified the relation the changes in the indexes of strengthen capacity of single- and two-ply binding materials samples as well as pasted ones. These findings have applied relevance while selecting the covering components for their production with minimized economic indicators. The results of experimental researches revealed the differences in the efforts of the destruction of single and double samples: the variation is from 1.91 % (for coated paper weighing 150 g/m2) to 41.77 % (for coated paper weighing 300 g/m2). It is assumed that the covers, constructively production of a double sheet of binding material, wear out during prolonged use and the effects of destructive operational factors in proportions of the approximate experimental results obtained for each of the materials used. The research of the same type of binder materials on the strength of the stretching of the samples revealed the difference in the impact of binder glue on strength indicators. Analysis of the graphs of strength indicators reproduces a gradual increase in the digital characteristics of the strength of samples of coated paper in relation to the increase in the weight of paper and a sample of chrome-ersatz paper made from waste paper, as well as the impact of different types of adhesives on strength indicators, which creates a partial information base for their expedient use. The total influence of the structure of materials and adhesives on which glued sheets of paper and cardboard showed the maximum strength values during stretching in glued samples of coated paper weighing 350 g/m2, coated paper weighing 300 g/m2 and a 0.3 mm thick chrome-ersatz paper, glue-bonded polyvinyl acetate dispersion.