PUR (polyurethane reactive) glue is the most durable binding glue available, offering design flexibility for any number of applications, including catalogues, instruction manuals and art books.
PUR allows us to successfully bind materials which would not have previously been attempted using conventional EVA (Ethylene Vinyl Acetate) hot melts.
PUR adhesives differ from conventional EVA hot melts in that they cure by crosslinking via a chemical reaction with moisture contained in the paper stock or surrounding air. Once cured, the adhesive's higher molecular weight provides a tough, pliable bond that is resistant to temperature extremes.
A common concern with perfect bound books is their stability in extremely hot or cold temperatures. PUR adhesive is impervious to temperature extremes. That means PUR-bound books can be used anywhere – from the hottest summer heat to the most harsh of winter conditions – without unwanted remelting or cold cracking.
The page pull strength of a PUR-bound book is more than 2.5 times that of a standard perfect-bound book using EVA adhesive. Books bound with PUR adhesive simply will not fall apart, even under heavy usage in the most demanding conditions.
The composition of PUR adhesive enables it to form a strong bond with the paper even in the presence of inks, coatings and varnishes. This is in contrast to EVA perfect binding, where these items must be removed from the spine area prior to binding. Another major advantage of PUR adhesive is its flexibility once cured.
"With our many various requirements of perfect bound literature we at Haslam Printers prefer the PUR glue option to ensure the best shelf life of the product regardless of material substance and type used."
Neil Maguire, Operations Director, Haslam Printers Limited.
"I have used Point Control for some years now and have always been delighted with not just the quality of the work carried out but the personal and professional service given at all times. Since we started to send work to Point Control, they have introduced a PUR service. We find the strength of this binding option second to none, particularly when using higher end paper stock, heavy inked stock and gloss paper, giving the opportunity to use these stocks in a soft back book format. I would recommend Point Control, without any hesitation to printers needing PUR Binding or Perfect Binding services."
Patricia Holt, Account Handler, Bowman Clarke Limited.