Pressure-sensitive adhesive is also called PSA, self-adhesive, self-stick adhesive.It is a type of non reactive adhesive. The pressure-sensitive is made when pressure is applied to bond the adhesive with the adherend. During this peroid of producing, no need the solvent, water, or heat to activate the adhesive. The pressure-sensitive  is widely used in pressure-sensitive tapes, labels, glue dots and other products. As the name "pressure-sensitive" indicates, the degree of bond is influenced by the amount of pressure which is used to apply the adhesive to the surface.