PUR Binding
What is PUR Binding?
PUR binding is our strongest bind. This has to do with the glue that is used, and sometimes PUR binding is considered to be the same as perfect binding because of the similarities. We like to keep it separate as both glues are different and have their own strengths and weaknesses.
The setup for a PUR job is exactly the same as a perfect bound job in terms of how the sections are prepared and the application of the cover. The only real difference is the adhesive used. Unlike the hot melt glue that is used for perfect binding we use Polyurethane Reactive (PUR) instead. PUR is air-cured and chemically reacts with the paper, essentially “welding” the pages together so that the page would rip long before it could be pulled out. As it is air-cured, a period of 24-48 hours is needed for the bind to set properly before the product can be used.
This extra strength allows huge page count jobs to be prepared easily and we can achieve spine widths of up to 60mm! In addition when a customer wants to use a particularly heavy stock we often recommend that they consider PUR binding which will provide a better hold.
The PUR process is slower than Perfect binding and extra time needs to be factored into the schedule for the curing process.
If you want to know more about the other binding methods we offer, you can read more on our Saddle Stitching and Perfect Binding pages.
Some Key PUR Binding Facts
- PIt has many similarities with Perfect Binding
- PThis binding is air cured rather than hotmelt glue
- PHas a spine like Perfect binding
- PWonderfully suited to large pagination products such as catalogues
- PVery suited to heavy papers
- PVery strong bind!
If you would like to know more please contact our Helpdesk
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