Price: 10.00
Since their introduction half a century ago, acrylic PSAs have been successfully applied in many industrial areas. PSAs are used in self-adhesive tapes, labels, signs, marking films, protective films, ermal dosage systems for pharmaceutical applications, biomedical electrodes, and self-adhesive hydrogels. In the last 50 years, development of acrylic PSAs has made tremendous strides from what was virtually a black art to what is now a sophisticated science. Today, both the few larger manufacturers of PSA articles and their even larger suppliers employ very expensive equipment to study PSA behavior, in particular tack, adhesion, and cohesion. These major properties are useful in characterizing the nature of PSAs. Tack is initial adhesion without pressure, peel is adhesion, and shear is cohesion. Tack measures an adhesive's capacity to bind quickly, peel the ability to resist removal by peeling, and cohesion the capacity to remain in position when shearing forces are exerted. Generally speaking, the first two variables are associated but are inversely related to cohesion.
