Hot melt EVAs are made from a combination of solid thermoplastic copolymers, tackifying resins, and waxes that function with the right viscosity when applied in the bookbinding operations. EVA adhesives demonstrate strong adhesive properties, but most importantly they set quickly by virtue of their hot melt character.
RESULTING PROPERTIES
A typical starting formulation for an EVA hot melt adhesive that can be used for bookbinding is shown in the table above. After application, EVA adhesives rigidly bind pages together. Modern EVA formulations have page pull strength and flex characteristics equal to emulsion adhesives. Modern EVA formulations are able to bind a wider range of paper stock then older formulations and are no longer subject to as much chemical breakdown during the aging process.
