In recent years, China's book printing quality supervision and inspection found that the quality of wireless glue binding accounted for 80% of the quality of the binding after printing.
A letter from Mr. Wu Xueyong and Mr. Hejun of Zhejiang Printing Group Co., Ltd. said that perfect binding is a mature and advanced book binding technology. After it was launched by a Swiss company in 1951, it was rapidly promoted. In Germany, it is currently over 90%. The paperback book is bound by glue. China began to introduce this technology from 1983. By the end of 2003, there were 1,118 wireless glue production lines across the country. At present, more than 60% of domestic books use wireless glue binding.
Why is this kind of problem that is popular in the international mainstream technology and has been brought to China? 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.
Press and Publication Administration
This situation has had a huge negative impact on the quality of bookbinding. It is said that when a national leader tutored his granddaughter at home, he found that the textbook had actually dropped pages. He immediately instructed relevant ministries and commissions to ensure the binding quality of textbooks. That is, at this time, the Press and Publication Administration recognized the huge problems in the binding quality of books and publications. So in 1999, it was led by the Press and Publication Administration and was specifically arranged by the National Printing Standardization Technical Committee and was held at the printing house of Beijing Baijiazhuang Youth Press. Seminars dedicated to discuss the quality of glue binding and solutions. However, due to the limited understanding of the wireless glue binding process at that time, no consensus was reached at the meeting. Afterwards, the National Printing Standardization Technical Committee established a research team and, with the strong cooperation of the relevant units, began conducting research in the country since 2000 to find out the variables and control methods related to the wireless glue binding process.
Interfering with the interests of manufacturers, resulting in the current EVA hot melt adhesive standard is too low
In 2002, on the basis of previous research, a consensus was reached that the quality of the main raw materials for wireless glue binding must be controlled. Therefore, it collaborated with the National Adhesive Standards Committee to formulate the "EVA Hot Melt Adhesive Standard" in order to purify the EVA hot melt adhesive market through technical indicators, so as to comprehensively improve the quality level of EVA hot melt adhesive. However, unfortunately, due to the self-interests of some rubber plants, they interfered with the formulation of relevant technical indicators, resulting in the development of EVA hot-melt adhesive standards that are technically difficult to meet the needs of the printing and binding industry.
New standard is under development
In view of the above, starting in 2004, the National Printing Standardization Technical Committee decided to formulate the “Requirements and Inspection Methods for Use of EVA Hot Melt Adhesives for Bookbinding†based on the needs of the printing and binding industry, with a view to identifying the hot melt adhesive itself. Requirements for binding equipment, requirements for production environment, requirements for binding work, requirements for book binding quality, and corresponding test methods, etc., to standardize and constrain the binding process of wireless glue in order to achieve the purpose of improving book binding quality in an all-round way. At present, after the previous phase of work, the draft of the draft of the draft standard has been completed and various opinions and suggestions are being solicited. Interested readers can express their opinions on this draft to the National Standardization Technical Committee Secretariat. Suggest.
Source: Southern Weekend
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