Why PUR rubber binding is prevalent in the United States (below)

Reduce environmental pollution

At the right temperature, PUR adhesives will not affect human health if the operation is correct and the local exhaust unit works well. However, any PUR adhesives contain a monomer-promoting monomeric hydrogen isocyanate (MDI), which can cause respiratory problems or other health problems when exposed to prolonged contact. The content of most PUR adhesives is less than 0.1%. According to Henkel, the Micro Emission (micro-radiation) products produced by them are reduced by 90% compared to the MDI emitted by conventional PUR adhesives.

Increase productivity

Warrenberg started producing a plug-in glue pot for several years. This glue pot can guarantee the fast conversion of PUR adhesive from solid to liquid. With this, the speed of book binding can reach 2000-8000 per hour. this. Other binding equipment from Warrenberg is also easily modified into a high-end PUR binding system.

In adhesives, there is a very common phenomenon. After applying the PUR adhesive to the binding of hardcover books, it is usually necessary to leave the book aside while waiting for curing, and only after 24 hours can a sufficient bonding strength be obtained. Henkel's DualCure adhesive solves this problem well. The ingredients in the adhesive react with UV light. The adhesive cures 80% in about 3 minutes and the product can be packaged. Now.

In addition, because many hardcover books use a rounded back to enhance the beauty and durability of the book, with DualCure adhesive, the PUR adhesive on the book block is fully cured, helping to make the next round and Rising treatment, so you can get a more beautiful round spine back.

DualCure adhesives have been widely promoted and used in countries such as Germany, Spain and Italy, and are expected to be popular in the United States soon.

Applications

So, what are the benefits for companies that have used PUR adhesives?

The old ones don't come new

The Seaboard Binding Factory in Morocco has been using the PUR Binding System brochure, brochures and reference books since 1994. Initially, it was a coincidence that the company had used PUR rubber binding: Seaboard used the hot melt glue that was used according to the customer's requirements. After binding hundreds of copies, the user decided to change the cover and the work was suspended. After 3 days, the new cover was printed. However, the book that had already been bound has cracked. Later, it was discovered that although each link of the binding was strictly operated as required, the sensitivity of the hot melt adhesive used to the solvent was too strong, and this led to the occurrence of this problem. Finally, the company and the customer agreed to use PUR adhesives. Sure enough, PUR adhesives did not present any problems during the entire operation. But also greatly enhance the binding strength of books.

The fact that PUR adhesives are not only insensitive to inks and solvents, but also has a very strong durability and high bond strength. The head of the company, Shear, said with emotion: "Thanks to these cracked publications, we really realized the unique advantages of PUR adhesives."

Get the highest customer satisfaction

The Spiral of Ohio company in Ohio is a professional manufacturer of close-booking and mechanical binding with nearly 100 employees and an area of ​​nearly 55,000 square feet. It began introducing PUR glue-binding systems in 1998. Through many years of practical experience, the company's head Jeff Klein believes that PUR rubber binding can be described as "the highest degree of customer satisfaction with the binding process."

Often, the company will work with customers to study the technical methods of the product and select the right binding process by balancing the advantages and disadvantages of EVA and PUR binding. However, many customers who choose to use PUR adhesives do not want to replace them, and they do not give up the use of PUR adhesives because of the increase in cost. They believe that using PUR adhesives produces products with high strength and a very comfortable feel.

Klein said that their success in using PUR binding also lies in their excellent performance and their insensitivity to temperature (ie, resistance to cold and heat) when PUE binding is used to treat all types of coated paper. Sexual). PUR adhesives can not only adapt to various environmental changes, but also are particularly suitable for the treatment of coating materials, such as fine brochures and binding of commercial publications, which will be the main application market for PUR adhesives. The PUR binding process will continue to play an advantage in this market.

Increase productivity

The new PUR adhesive and binding technology greatly improved the long curing time of the PUR, and due to the fast drying speed, the production efficiency has been significantly improved, and the flexibility of the enterprise has been correspondingly improved.

Detroit Aliied Bindery has 45 employees and a 40,000-square-foot factory building. The company began using PUR adhesives in early 2003. In order to shorten the production cycle, the company hopes that the PUR adhesive supplier, Henkel, can give the corresponding paper tensile strength according to the specific curing. “Because our customers are very keen on PUR adhesives and want to know exactly how long it takes for the entire binding process, we need to consult Henkel about some of the technical parameters in the specific binding environment,” said company head Kris Koc.

Henkel gave the following answers: For example, a book of about 190 pages, a thickness of 0.5 inches, and a weight of 50 lbs., Henkel spliced ​​and tested 50 books, tested the paper resistance once every hour after gluing. Tensile strength, and it was found that in less than 4 hours of curing time, the tensile strength of the paper using PUR adhesive was greater than the GPO industrial standard value (the tensile strength of the paper measured after fully curing with EVA hot melt adhesive). ).

In particular, Koch added that while books bound with PUR adhesives have been verified to be very strong within a few hours, it is better to handle them lightly and carefully during the first 12 to 14 hours.

cut costs

Seidl's bookbinding company in Houston has a 67,000-square-foot building and has used PUR adhesive for several years on the Martini Binder. Two years ago, they decided to use PUR on all glue-binding lines. Binding process.

Company President Bill Seidl said: "All the PUR glue binding process is a wise decision for us and our users. Users are very satisfied with the outstanding strength, flexibility and durability of the book. And we, due to the reduction in different glue The time taken to switch between the adhesives shortens the production cycle, thereby reducing costs."

Maintain customers

In 1993, the Riverside Group in New York (with a 138,000-square-foot building) became one of the first manufacturers to adopt the PUR binding process. The company added a Nordson sizing device to its Martini StarPlus gluing machine and used PUR glue for bookbinding and hardcover books.

“The greatest value PUR adhesives bring to them is helping us retain customers,” said Fred Daubert, president of the group. “Last year we signed a contract to bind high-end toy brochures with a large number of The screen was heavy, and most of the pages were subject to a lot of UV glazing, and spilled over the spine, affecting the binding process of books. In order to obtain high tensile strength, we used PUR adhesive, and the effect was felt by customers. Surprisingly, because of its high strength and flexibility, it's almost impossible to bond securely with ordinary adhesive binding.There is no doubt that PUR binding avoids the reprint of our customers and helps us retain customers. ".

From the above case, it can be seen that PUR rubber binding has won the trust of US binding companies and their users. At present, the field of domestic binding has not yet been adopted. How will the future development be? Let us wait and see.

Source: Print World