Studies in the nature of adhesive tack

摘要

AbstractBy measuring tack energy using a modified probe tack testing procedure, the interrelation of bulk energy and surface energy effects in pressure‐sensitive adhesives was studied. Tack energy was strongly influenced by the solvent used in the preparation of the adhesive film. A procedure was empirically derived which reduced the number of variables to a single variable, yielding a single master curve in which the independent variable was the speed of probe withdrawal expressed on a logarithmic scale. The form of the curve was a simple exponential function,y=Aexp (mx), whereAandmare constants andyandxare the dependent and independent variables, respectively. The constantmwas found to be a unique function of the type of adhesive used. A theoretical interpretation of the devised procedure was based on bulk viscoelastic effects and a combined activation energy–free volume concept of adhesive bonding. The wider implications of this are briefly discus