Question

What is the Adhesive Bleed - What is adhesive bleed??

Accepted Answer

The migration of an adhesive  especially a pressure sensitive adhesive  in a label construction as a result of cold flow  Cold flow is another term for creep  which is a type of material deformation that is defined as the tendency of a solid material to slowly move or deform under the influence of mechanical stress  Creep is a time-dependent deformation and accumulates as a result of long-term exposure to stress  the rate of creep is determined by the material's properties  exposure time  exposure temperature  and the degree of stress that is applied to the material  Temperature is a particularly influential factor as virtually all materials will creep when approaching their melting point  This means that creep can occur at relatively low temperatures  for example  some plastics and metals  with low melting temperatures  will begin to creep at room temperature  while glacier flow is a result of creep in ice         In labelling  creep can occur in any of the materials used to make labels  although it is particularly problematic when dealing with adhesives     where it is usually referred to as adhesive bleed or adhesive ooze  Adhesive bleed is most commonly caused by too much heat and or pressure being applied and can occur at any point throughout the manufacturing and printing processes  during storage  or after a label has been applied to a substrate  It can cause blocking  surface to surface sticking between sheets or rolls of labels   deform or discolour adjacent layers  damage printers  and prevent a label from successfully adhering to a substrate

Temporary Labels - What are temporary labels?

Definition of TEMPORARY LABEL: