Лако-красочные материалы — производство

In terms of quantity, the most important application in the graphic industry is that of unsewn binding (‘perfect binding’) by means of dispersion adhesives, thermoplastic hot melts, or reactive polyurethane hot melts, depending on the requirements [38]. Previously, animal glue protein was used in this role, but is no longer important in unsewn binding. The decision as to which of these systems can be applied depends, for example, on the materials to be bonded, on the existing machinery, and on the adhesive application systems. The wear and tear to be expected later in the life of the bonded material is another issue worthy of consideration. The most important

properties of common adhesive systems used for unsewn binding today are com­pared in Figure 8.39.