Books bound with PUR adhesive have excellent adaptability and book-sharing performance; resistance to cold and heat; tear resistance; and adhesion to special materials, as well as the influence of ink and other factors, and many other advantages. Although it also has a large investment and other shortcomings, but in the United States, many professional binders and printing plants in the use of EVA hot melt adhesive, PVA cold glue at the same time, more focus on the PUR adhesive, and More and more contract manufacturers are beginning to use PUR adhesives. So, why does PUR rubber binding prevail in the US bookbinding market? How smart manufacturers are cleverly solving the technical problems of PUR binding, and what unexpected surprises PUR rubber binding has brought to manufacturers? Books bound with PUR have many advantages such as excellent adaptability and book sharing performance; cold and heat resistance; tear resistance; and adhesion to special materials, as well as the influence of factors such as ink. Although it also has disadvantages such as large investment, in the United States, many professional adhesives and printing plants are more focused on PUR adhesives while using EVA hot melt adhesives and PVA cold adhesives, and more and more contract manufacturers Start using PUR adhesive. So, why is PUR perfect binding popular in the American bookbinding market? How do smart manufacturers solve the technical problems of PUR edging, and what unexpected surprises does PUR edging bring to manufacturers?
Supplier Experience
In the United States, some companies engaged in the production of PUR glue binding systems have found in the long-term research and development and market operations that the use of PUR glue for book binding has become an unstoppable trend.
winlong: PUR combined with the heart
The manager of the bookbinding department of the winlong group believes that, unlike publishing printers, the use of PUR bookbinding is a natural and necessary means for professional bookbinding companies. This is mainly because there is only one job for publishers and printers. They usually just print the same job on the same substrate, and bookbinders receive lots of books and prints in different orientations on different substrates. Order. In this case, PUR glue has a place because it is very flexible and can adapt to different working pressures.
Martini: 1/3 glue binder with PUR glue binding
For the past two years, a third of Martini's martini equipment sold in the United States has PUR perfect binding. According to Kerry Burrouhgs, Binding Manager at Martini (New York), PUR rubber binding has been widely adopted in Boston, Houston, New Jersey, Rochester and New York, and has won the trust of users.
Kolbs, Warrenberg: More than 50% of perfect binding machines have two glue functions
Both KOLBS and Warrenberg claim that more than 50% of bookbinding equipment launched by specialist contract manufacturers is already equipped with PUR adhesive coating systems and traditional heat. Melt coating systems meet the different needs of customers.
solution
PUR perfect binding is not perfect, but it also faces some problems. But the technical experts in the United States have also cleverly solved these problems through research, making the PUR gel combination more widely applicable to various fields.
Retrofit existing equipment
For PUR glue coating equipment, in addition to purchasing new equipment, it is also possible to retrofit old-fashioned binding equipment.
According to Bob Shaffer, President of Kolbs, for the original glue-packing equipment, the use of Kolbs or Nordson's glue system can easily realize the transformation of PUR glue. When refurbishing your device, be aware of the following issues.
(1) Since the sizing methods of PUR glue are mainly nozzle type and roller type, it is necessary to pay attention to whether the nozzle and roller of the equipment are sufficient.
(2) A complete binding system requires at least 3 or 4 spine preparation units. Many older machines may not have adequate spine preparation equipment.
(3) In order to prevent the deformation of the spine and prevent the adhesive from sticking to the cutter, the equipment needs to be equipped with a long enough conveyor belt.
Get an even layer of glue
Martini's Burroughs said that since the thickness of PUR glue is between (1.0-1.2) x 10-2 inches, it is much thinner than traditional hot melt adhesives (2.8-3.0) x 10-2 inches. In order to obtain an even and smooth glue layer, the clip above the glue plate must be kept firmly, otherwise the book will move up and down and the glue layer thickness will be unevenly distributed. Therefore, using parallel-parallel clamps is preferable to hinged clamps.
reduce waste
The PUR glue application system includes plastic tanks, heated hoses, pre-melting devices, etc. PUR sizing equipment needs to be equipped with a dedicated pre-melting device. According to different needs, different types of martini are set, and the following options are available: 55 gallon drums for medium and large users, 5 gallon drums for small users, special cylindrical drums (8 inches in diameter, 16-inch long) . Different types of buckets can improve the utilization of PUR glue.
