PUR Binding is our flagship product and our PUR binding service offers our clients an unparalleled level of quality.
Combined with our superb attention to detail and emphasis on customer service throughout it’s no surprise we are regarded as one of the leading book binding specialists.
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 harshest 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.
All flat sheets are folded into sections
The folded sections are then put in the correct order and onto the Pantera’s gatherer where they are collated together to form the text or book block.
All covers are pre-trimmed oversize to the size of the finished book and match the section size of the text.
These covers are then inserted into the cover feeder on the Pantera binder ready for binding.
We can crease heavier covers in-house on our PITSTOP creasing machine. This allows us to produce a heavier, cylinder type crease to avoid cracking. We can also perforate covers and sheets using the same machine.
The collated block then enters the Pantera binder where its spine is prepared by a milling action to maximise the glue penetration. Spine glue is applied to the book’s prepared spine and side glue is applied to form a hinge on both the front and back pages of the book next to the spine.
This glued book block meets up with the cover feeder and pre-scores the spine width and book hinges before matching the two together. The cover is then pressed onto the book block in the nipping unit. A series of conveyors transfer the untrimmed book to the Merit S Trimmer
Three Knife Trimming
Our Merit S trimmer finishes the book off. Trimming off the foredge, head and foot of the untrimmed book making the book the correct size. The finished book is then sent out to a stacker unit to be packed.
Our Iram 12 multi-headed drill offers our clients an additional service; to drill 1, 2, 3 or 4 holes along the spine of a book so that it can be inserted into a ring binder for presentation purposes.