
What Is PUR Binding?
PUR Binding refers to a softcover book binding method that makes use of Polyurethane Reactive (PUR) adhesive.
PUR Binding is a form of perfect binding, where the pages and cover are glued together at the spine and the other three sides of the book are trimmed as needed to give them clean "perfect" edges. This method creates a professional, durable, and visually appealing finish, making it a popular choice for catalogs, manuals, photo books, and other publications that demand both quality and longevity.
Polyurethane Reactive (PUR) is the most durable book binding glue available. It is far superior to Ethylene Vinyl Acetate (EVA) or any other adhesives used in traditional perfect binding. In fact, many publishers and print buyers now specifically request PUR bound books for projects that require maximum strength and flexibility.
The Main Benefits of PUR Binding
Superior Flexibility of PUR
PUR has superior flexibility, which prevents the spine from cracking when the book is opened wide or pressed down flat. This flexibility makes PUR bound books ideal for thick manuals, product catalogs, or books that will be opened and used frequently.
Better Resistance to Page Pull-Out
Compared to EVA adhesive, PUR offers 40% to 60% better resistance to page pull-out. In fact, it is nearly impossible to pull a page out of a book bound with PUR adhesive. This enhanced page strength ensures your book stays intact, even under heavy use.
Adheres to a Wide Variety of Substrates
PUR can adhere to a wide variety of substrates, including ink, varnish, recycled paper, mylar, and UV-coated or aqueous-coated stock. This means PUR perfect binding can handle virtually any paper type or coating—something traditional binding methods often struggle with.
Unaffected by Extreme Environments
PUR's performance and structural integrity is unaffected by extreme cold or hot environments (-40 to 200°F). Whether your books are stored in a warehouse or shipped across the country, PUR bound softcover books retain their strength and appearance.
Strong and Pliable with Less Adhesive Needed
Because PUR is so strong and pliable, less adhesive is needed to bind the cover and pages firmly. Less glue means less distortion of the spine's shape, resulting in a crisp, square appearance on thinner books. This gives PUR bound books a clean, professional finish that enhances their overall presentation.
When to Choose PUR Binding
If you're printing workbooks, training manuals, catalogs, or photo books that will see frequent handling, PUR binding is an excellent choice. It combines the professional look of perfect binding with unmatched strength and flexibility. Many publishers now prefer PUR binding for its ability to withstand repeated use without cracking or losing pages.
Bottom Line: If quality and durability are important to you, always select PUR binding when you have the choice.
If you have any questions about PUR Binding or have an upcoming PUR bound book project, give Formax Printing Solutions a call at 866-367-6221, or submit our quote request form Softcover book printing is one of our specialties, and our team would be happy to help you choose the best binding method for your project.
Take care!
Rick