PUR - Perfect Binding - PDC Presentation Solutions Ltd

PUR - Perfect Binding

The fundamental difference between the two types of binding is the adhesive used in the process. Perfect binding uses ethylene vinyl acetate (EVA) adhesives whereas PUR uses polyurethane reactive (PUR) adhesives. Put simply, the binding really only differs by way of the type of glue used. It is the properties of each type of adhesive, however, which is important in determining which is suitable.

A key reason PUR adhesive is often the preferred choice is due to its excellent flexibility and ‘lay-flat’ qualities. The benefits here are two fold. Firstly, due to PUR requiring a smaller layer of adhesive when compared to perfect binding, it allows even the thinnest of books (a minimum of 3mm is still recommended) to maintain a square and rigid spine. Secondly, when applied to standard thickness, PUR glue affords considerably more flexibility and pliability than EVA, which allows books to demonstrate lie flat characteristics. This in turn minimises any spine cracking when the finished product is ‘flattened’ out for reading.

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