. Pressure Sensitive Adhesive (PSA)An adhesive system, which can be applied to the foam to adhere the foam part to another substrate by removing the paper backing. PSA is an adhesive... such as smoothness, surface energy, removal of contaminants, etc. are also important to proper bonding. PSA s are usually designed to form a bond and hold properly at room temperatures.... PSA s typically reduce or lose their tack at cold temperatures and reduce their shear holding ability at high temperatures; specialty adhesives are made to function at high or low...