Wireless glue book quality influencing factors--the quality of hot melt adhesive

Books and magazines glue binding process in the 1980s began to use in China, when the use of wireless glue binding book binding quality is very good. In 1999, at a bookbinding quality seminar held in Beijing, the master of the Beijing Xinhua Printing Factory had presented some books to the delegates. There was a “Deng Xiaoping’s Selected Works” bound in the 1980s using the wireless glue binding process, more than a decade ago. The book, the binding quality without any problems, is not brittle, does not spread, does not drop pages, does not distort, has a good appearance, and turns the book pages smoothly and very well. Visible wireless glue binding process is fully guaranteed book binding quality. However, another book that was bound in 1996 with the binding process was completely at the other extreme. The adhesive layer was yellow and brittle. After the book was opened, the adhesive layer broke, and the pages were scattered. .

Why is this? The direct reason is that the quality of the hot melt used is not critical.

Bad money drives out good money, high oil price top scattered books and magazines

Due to technical reasons, it is currently impossible to produce vinyl adhesives and vinyl acetate copolymers that are required for EVA hot melt adhesives, and these materials must be imported. With the sharp rise in the price of oil, the prices of these materials are also rising. The strange thing is that the price of EVA hot-melt adhesives has not risen yet. For hot-melt adhesive manufacturers, it is really not to stop the production of raw materials and it is dead. Into the raw materials, it is lost or sold.

Why is the price of EVA hot melt adhesives not going up? In a word, bad money expelled good money. With the introduction of competition mechanisms in the printing, publishing, and distribution of books and periodicals, publishers have repeatedly reduced the wages of printing and bookbinding companies in order to obtain maximum profits. In order to survive, printing and bookbinding companies also try to reduce the prices of various raw and auxiliary materials, resulting in low prices. Poor quality hot melt adhesives are popular in the market, and the real high quality EVA binding hot melt adhesives have few markets because of price.

Substandard filling is no different from drinking and quenching thirst

Faced with such a market, EVA hot-melt adhesives manufacturers cannot afford to raise prices, and they are unable to reduce the price of ethylene and vinyl acetate copolymers needed for production. There is only one way to reduce costs. The methods and tricks that can be used have all been exhausted: In addition to adjusting the formula of rubber based on the temperature difference between winter and summer, and raising a group of disabled people to reduce the taxation cost, they have to buy large quantities of poor quality that are often dismissive. Ethylene and vinyl acetate copolymers, the price of such raw materials and genuine raw materials, a difference of 1,000-2,000 yuan per ton, so as to solve the cost problem. This is to quench your thirst!

Such things are gradually spreading in the market, and the direct consequences of this will be very severe. The vast majority of printing and binding companies did not perceive the danger of coming. For historical reasons, in the Chinese printing industry, post-press binding has not received enough attention, resulting in the backwardness of our country's entire post-impression situation. According to statistics, in recent years, China's book printing quality supervision and inspection found that the quality of post-impression binding accounted for 65% of all books and magazines, and among them, the quality of wireless glue binding accounted for 80% of them. Such post-impression binding status, such as the use of EVA-bound hot melt binding books and books that use unqualified raw materials, is really chilling.

Source: Guangdong Printing Network