The Influence of Paper Permanence on Adhesive Joint Strength

This paper summarizes the results of the analysis of selected physical, chemical and mechanical properties of paper. Paperbacks were made from commercial papers of different basic weight, defined by Standard grades of recovered paper. The specific properties of paper cause changes of the adhesive joint strength during artificial ageing process. Paper is polymer material, paper viscoelastic behavior describes its mechanical properties. Paper has properties which are intermediate between those of an elastic solid and a viscous liquid. The elastic solid which is deformed by the external force stores all the energy which it obtains from the work done by the external force during deformation. On removal of external force the energy is then available to restore the body to its original shape. In the research it was found that elastic properties of paper have direct influence on the adhesive joint strength after moisture-low heat ageing over period of time. The assessment of the adhesive joint strength was made by statistical linear regression method.