Solid Book Binding Spine Polyurethane Hot Melt Adhesives White 20kg

PUR bonds are also more durable, offering greater stability as the book ages. The binding is fully resistant to print ink oil migration and can bond to coated and uncoated stock. In addition, PUR doesn’t experience the problems with extreme temperatures that can affect traditional EVA binding. Once cured, EVA adhesives can be reactivated with heat, causing them to melt. PUR creates a strong elastomeric film that isn’t subject to reactivation. As a result, PUR won’t re-melt under high heat. Conversely, EVA adhesives can become brittle and crack in extremely cold temperatures. PUR won’t crack because it can’t be reactivated.