DRUPA 2OOO demonstrates the new technology and development prospects of the future print media, and also puts forward new requirements for the post-press process reform. In order to completely change the backwardness after printing, promote post-printing process reform and technological innovation, and quickly improve the level of post-press processing, the Postpress Technology Innovation Center, China Baoxie Paper Products Information Center, Zhengdatian New Materials Research Institute, and Henan The “Printing Technology Innovation Market Seminar†jointly held by the Provincial Printing Binding Technology Plant was held in Suichuan, Henan Province from September 1st to 5th, 2000. Representatives from the printing, packaging production and processing, equipment and equipment manufacturing and supply, research, teaching, information and other industries and the post-press technology innovation promotion and application market attended the seminar.
The meeting analyzed several features of the unbalanced development of the current printing industry technology:
First, the structure of the printing industry has grown from commercial newspapers and other media to commercial printing. Commercial advertising, forms, and packaging have gradually become the mainstay of printing. The number of policy-oriented newspapers and periodicals has reduced the print output of such publications, resulting in fixed-point printers at all levels of books and periodicals. It is also a difficult step for China's printing pillar companies. The rapidly-developing emerging printing companies with commercial printing as the main body are also positioned. Accurate, advanced equipment, reliable quality, efficient and efficient service, and other advantages, has emerged as an important pillar of the printing industry, occupies a new printing market.
Second, due to various reasons such as science and technology, economic information exchange, and prediction of future development trends, the overall layout of the printing industry is that the technological innovation in coastal open areas is obviously better than inland, especially in the west. The trend of “living in and out of the country†and “Northern Living and South Indian†have continued unabated.
Third, in the process of technological advancement, there is a significant gap in the speed of prepress, printing, and postpress of the printing industry. With the rapid development of the computer industry and the popularization of Internet technology in the world, the printing and publishing industry has been affected by digitalization and networking as a traditional information industry. When China's electronic laser photocopying and discharging system reached the international advanced level, prepress has begun to adopt advanced information absorption, storage and transportation technologies. Editing work is automated, and communication and data exchange can be conducted with relevant organizations at home and abroad. Super-XH100 satellite news picture transmission processing system has been completed by Xi'an Jiaotong University and Xinhua News Agency. Through the combination of hardware and software technology and multi-level, multi-mode program development means, the prepress information transmission has reached the level of automation and intelligence. The rapid development of multi-color offset printing in various printing companies has already taken shape in China's printing industry. Fast printing, personalized printing, and on-demand printing have become new trends in the printing industry under the development of market economy.
Compared with the rapid development of prepress and printing, labor-intensive printing is even more backward. Extensive type of postpress processing is still based on manual labor or semi-mechanized operation. Obviously affect the quality of high-speed, fine print, restricting the overall rapid development of the printing industry.
The meeting discussed the basic situation and major issues after printing:
First, post-press processing in the printing of books and magazines is mainly focused on the binding process; in terms of packaging and printing performance for the film, coating, die-cutting, indentation, hot stamping and other aluminum technology. More often than not, post-press finishing and book printing are compatible and compatible.
Second, the binding process due to the process design and implementation, production operations and coordination, equipment, technical performance and maintenance, material quality determination and selection and other factors, not only the existence of low production efficiency, but also obvious quality problems. According to the statistics of relevant departments, the reason for the unsatisfactory quality of books and periodicals printing is that more than 60% of them are due to binding.
Third, film, glazing as the conventional process of finishing the surface after printing, there is a common production process in the production process of pollution, prone to fire, the traditional after the coating is wet and easy to blistering and filming , warping and other issues. Solvent-based, UV-type coating is prone to problems such as color printing or disappearance of metallic color. At the same time, the film coating and polishing products processed by this traditional production process all have odor migration and affect the later issues of the quality of the packaged goods.
Fourth, the hot stamping of electro-aluminum is the development of gilding finishing to multi-color, multi-layout, new material direction. At present, there are problems such as color fading, color fading, and color loss after laminating and electro-aluminization. There are also new problems that can easily come off after stamping anodized aluminum on super bright card paper.
V. The main reasons for the existence of various problems after printing can be summarized as follows:
1. The process behind the 1 binding process is still based on the manual work of iron wire. The unavoidable arbitrariness of the manual operation of the complex procedures from the inside leaflet to the hot back book is a gene that is difficult to guarantee the development and quality of productivity.
The coating equipment introduced in the 280s was a rubber compound machine. This process is the result of a large amount of pollution generated in the process of production, which is detrimental to the physical and mental health of operators, and destroys the cleanliness of the surrounding environment; it is extremely prone to sudden fires and does not provide reliable guarantees for safe production; products that are prone to large quantities after film coating Foaming, filming quality accidents; after the film is prone to odor migration caused by the residual organic solvent volatilization, so that the inner package of goods odor deterioration of various problems fundamental.
3 coating process both coating - calendering process, but also UV coating process. The drying technology of the liquid coating coating to the solid state conversion makes it impossible to dry the interior of the coating when the surface is dry, and the internal drying of the coating further affects the color of the printing ink layer and changes the problem.
2. Equipment defects 1 Manual binding After brushing the adhesive on the spine, the pallets borrowed from the front and back sides of the album were misplaced, and the glue that was applied to the spine was changed to change the original leveling.
2 The hot back setting temperature control during manual binding rarely has automatic adjustment function. When the temperature is low, the drying is poor and the book spine is deformed; when the temperature is high, the drying is too fast, the local shrinks abruptly or the coating film surface is emptied or melted.
3 Binding device milling cutter structure defects, easy to cause the inner text page milling slot is too shallow, glue hot melt adhesive is not easy to perfuse.
4 The reverse coating structure of the coating equipment is an independent power drive. The difference with the composite host, resulting in more or less glue error, affecting the stability of adhesion.
5 In the drying equipment of the film coating equipment, in the same drying tunnel, there are actually three different temperature regions and three concentration regions that are opposite to those in which the organic solvent is effectively volatilized, resulting in waste of resources rather than the expected adhesion effect.
6 The coating of the film coating equipment is designed together with the film discharge mechanism so that the area with the highest concentration of solvent volatilization is in the electrostatic field of film discharge. The static sparks and the highest concentration of extremely flammable and explosive volatilization gases are the root cause of sudden fires caused by the wet glue compounding process.
7 The thermal safety of the thermocompression bonding mechanism of the laminating equipment is generally unreliable due to the fact that the diameter of the heating roller is too small, the wall of the tube is thin, the thickness of the tube wall is uneven, and the thermal conductivity of the single-cavity air medium is structurally designed and produced. .
8 The coating thickness of coating equipment lacks a reliable control device and cannot meet the film coating requirements.
9 The drying equipment for coating equipment lacks a deep dry structure, so that the drying only shows the degree of surface layer.
10 Hot Stamping Anodized aluminum equipment is just a hot press main structure for layout replacement. There is no pretreatment device for processing the substrate surface.
3. In addition to the old 1 manual binding adhesives are all hydration type, concentration control is not standard. Not only cause instability of the adhesive force, shrinkage after drying, but also makes the wire nail easy to rust.
2 The main component of glue hot melt adhesive is still EVA. Paraffin wax regulates its fluidity, tackifying resins reflect its viscosity, and talcum powder increases its hardness. The ingredients in the constituents are contradictory combinations. The infiltration of the book block relies on the fluidity at high temperatures, and this guarantee of fluidity is just an inducing factor for accelerating the aging of the hot melt adhesive, reducing the adhesive force, and significantly worsening the low temperature brittleness.
3 Solvent-based adhesives for lamination are customary materials. Coated film processing of low-value, intense competition tends to use solvent-based adhesives that appear to be low in price and high in cost, and forces adhesive producers to use alternative compositional materials in order to ensure their survival at low value. . This in turn increases the pollution of the production process and the subsequent problem of product quality.
4 The composition of adhesive-bonded hot-melt adhesives, film-coated adhesives, glazing coatings and other materials is basically based on early foreign data and uses materials that have been eliminated in advanced countries.
4. The composition of the post-imprint basic team is a member of prepress and post-press screening. Compared with prepress and printing production processes, the cultural level is relatively low and the age structure is too large. Assault production and processing, and many rural idle labor temporarily supplemented to the manual operation of the production line. Postpress workers rarely receive systematic training, and most lack basic printing knowledge. Basically, post-printing is in a physically redundant state of labor.
The meeting communicated and exchanged the main results of the current post-press technology innovation and feedback from the application market:
First, the use of PN junction semiconductor temperature devices and digital liquid crystal display development of automatic temperature control system has been used in the vast area of ​​book binding hot back machine, glue machine glue tank, glue book repair and other production lines. The control of thermal power has improved the state of mechanical technology and material use performance.
2. The domestically-made disc type and bar type perfect binding machines have been mass-produced in Shanghai, Jiangsu, Hebei, Liaoning, Henan, Heilongjiang and other places, accelerating the improvement of the process of bookbinding in China to the wireless binding process. The milling and backing slotting knife is improved from V type to U type, which enlarges the cutting surface of the spine milling slot, which is beneficial to the infusion of hot melt adhesive.
Third, to adapt to China's paper substrate and high-volume, short-cycle printing, binding production characteristics of low-temperature high-strength new book binding hot melt adhesive TNS-TYHMA series in the disc, strip and automatic glue production line after use, has passed quality The standard of technical supervision has been determined and the scope of application has been gradually expanded.
IV. "Hua Cui" brand solventless fusion hot melt adhesive pre-coated film and dry composite technology have been applied in the printing, packaging, and surveying and mapping industries in 28 provinces, autonomous regions, and municipalities directly under the Central Government. Completely solve the various problems that occur during the production of laminated film and the post-laminating products.
Fifth, pre-film dry-type composite film has been reduced to a simple hot-pressing technology, technology is concentrated to ensure heat. The HZ-920 liquid-dynamic infrared dual-cavity oil temperature compounding machine is characterized by outstanding technical innovation, easy operation, high efficiency and low consumption, and is gradually becoming a hot spot for investment in the new generation of film-covered equipment.
Sixth, the coating method of drying is developing toward thermal curing, light curing and hybrid curing. Drying methods with deep curing of electron beam or other thermal energy are actively under development. UV coating coatings have been listed on the market in Shanghai, Guangdong, Hunan, and Henan. The water-based glazing coating suitable for the offset printing machine and the film-forming glazing coating can be applied on the printing production line.
The meeting analyzed several features of the unbalanced development of the current printing industry technology:
First, the structure of the printing industry has grown from commercial newspapers and other media to commercial printing. Commercial advertising, forms, and packaging have gradually become the mainstay of printing. The number of policy-oriented newspapers and periodicals has reduced the print output of such publications, resulting in fixed-point printers at all levels of books and periodicals. It is also a difficult step for China's printing pillar companies. The rapidly-developing emerging printing companies with commercial printing as the main body are also positioned. Accurate, advanced equipment, reliable quality, efficient and efficient service, and other advantages, has emerged as an important pillar of the printing industry, occupies a new printing market.
Second, due to various reasons such as science and technology, economic information exchange, and prediction of future development trends, the overall layout of the printing industry is that the technological innovation in coastal open areas is obviously better than inland, especially in the west. The trend of “living in and out of the country†and “Northern Living and South Indian†have continued unabated.
Third, in the process of technological advancement, there is a significant gap in the speed of prepress, printing, and postpress of the printing industry. With the rapid development of the computer industry and the popularization of Internet technology in the world, the printing and publishing industry has been affected by digitalization and networking as a traditional information industry. When China's electronic laser photocopying and discharging system reached the international advanced level, prepress has begun to adopt advanced information absorption, storage and transportation technologies. Editing work is automated, and communication and data exchange can be conducted with relevant organizations at home and abroad. Super-XH100 satellite news picture transmission processing system has been completed by Xi'an Jiaotong University and Xinhua News Agency. Through the combination of hardware and software technology and multi-level, multi-mode program development means, the prepress information transmission has reached the level of automation and intelligence. The rapid development of multi-color offset printing in various printing companies has already taken shape in China's printing industry. Fast printing, personalized printing, and on-demand printing have become new trends in the printing industry under the development of market economy.
Compared with the rapid development of prepress and printing, labor-intensive printing is even more backward. Extensive type of postpress processing is still based on manual labor or semi-mechanized operation. Obviously affect the quality of high-speed, fine print, restricting the overall rapid development of the printing industry.
The meeting discussed the basic situation and major issues after printing:
First, post-press processing in the printing of books and magazines is mainly focused on the binding process; in terms of packaging and printing performance for the film, coating, die-cutting, indentation, hot stamping and other aluminum technology. More often than not, post-press finishing and book printing are compatible and compatible.
Second, the binding process due to the process design and implementation, production operations and coordination, equipment, technical performance and maintenance, material quality determination and selection and other factors, not only the existence of low production efficiency, but also obvious quality problems. According to the statistics of relevant departments, the reason for the unsatisfactory quality of books and periodicals printing is that more than 60% of them are due to binding.
Third, film, glazing as the conventional process of finishing the surface after printing, there is a common production process in the production process of pollution, prone to fire, the traditional after the coating is wet and easy to blistering and filming , warping and other issues. Solvent-based, UV-type coating is prone to problems such as color printing or disappearance of metallic color. At the same time, the film coating and polishing products processed by this traditional production process all have odor migration and affect the later issues of the quality of the packaged goods.
Fourth, the hot stamping of electro-aluminum is the development of gilding finishing to multi-color, multi-layout, new material direction. At present, there are problems such as color fading, color fading, and color loss after laminating and electro-aluminization. There are also new problems that can easily come off after stamping anodized aluminum on super bright card paper.
V. The main reasons for the existence of various problems after printing can be summarized as follows:
1. The process behind the 1 binding process is still based on the manual work of iron wire. The unavoidable arbitrariness of the manual operation of the complex procedures from the inside leaflet to the hot back book is a gene that is difficult to guarantee the development and quality of productivity.
The coating equipment introduced in the 280s was a rubber compound machine. This process is the result of a large amount of pollution generated in the process of production, which is detrimental to the physical and mental health of operators, and destroys the cleanliness of the surrounding environment; it is extremely prone to sudden fires and does not provide reliable guarantees for safe production; products that are prone to large quantities after film coating Foaming, filming quality accidents; after the film is prone to odor migration caused by the residual organic solvent volatilization, so that the inner package of goods odor deterioration of various problems fundamental.
3 coating process both coating - calendering process, but also UV coating process. The drying technology of the liquid coating coating to the solid state conversion makes it impossible to dry the interior of the coating when the surface is dry, and the internal drying of the coating further affects the color of the printing ink layer and changes the problem.
2. Equipment defects 1 Manual binding After brushing the adhesive on the spine, the pallets borrowed from the front and back sides of the album were misplaced, and the glue that was applied to the spine was changed to change the original leveling.
2 The hot back setting temperature control during manual binding rarely has automatic adjustment function. When the temperature is low, the drying is poor and the book spine is deformed; when the temperature is high, the drying is too fast, the local shrinks abruptly or the coating film surface is emptied or melted.
3 Binding device milling cutter structure defects, easy to cause the inner text page milling slot is too shallow, glue hot melt adhesive is not easy to perfuse.
4 The reverse coating structure of the coating equipment is an independent power drive. The difference with the composite host, resulting in more or less glue error, affecting the stability of adhesion.
5 In the drying equipment of the film coating equipment, in the same drying tunnel, there are actually three different temperature regions and three concentration regions that are opposite to those in which the organic solvent is effectively volatilized, resulting in waste of resources rather than the expected adhesion effect.
6 The coating of the film coating equipment is designed together with the film discharge mechanism so that the area with the highest concentration of solvent volatilization is in the electrostatic field of film discharge. The static sparks and the highest concentration of extremely flammable and explosive volatilization gases are the root cause of sudden fires caused by the wet glue compounding process.
7 The thermal safety of the thermocompression bonding mechanism of the laminating equipment is generally unreliable due to the fact that the diameter of the heating roller is too small, the wall of the tube is thin, the thickness of the tube wall is uneven, and the thermal conductivity of the single-cavity air medium is structurally designed and produced. .
8 The coating thickness of coating equipment lacks a reliable control device and cannot meet the film coating requirements.
9 The drying equipment for coating equipment lacks a deep dry structure, so that the drying only shows the degree of surface layer.
10 Hot Stamping Anodized aluminum equipment is just a hot press main structure for layout replacement. There is no pretreatment device for processing the substrate surface.
3. In addition to the old 1 manual binding adhesives are all hydration type, concentration control is not standard. Not only cause instability of the adhesive force, shrinkage after drying, but also makes the wire nail easy to rust.
2 The main component of glue hot melt adhesive is still EVA. Paraffin wax regulates its fluidity, tackifying resins reflect its viscosity, and talcum powder increases its hardness. The ingredients in the constituents are contradictory combinations. The infiltration of the book block relies on the fluidity at high temperatures, and this guarantee of fluidity is just an inducing factor for accelerating the aging of the hot melt adhesive, reducing the adhesive force, and significantly worsening the low temperature brittleness.
3 Solvent-based adhesives for lamination are customary materials. Coated film processing of low-value, intense competition tends to use solvent-based adhesives that appear to be low in price and high in cost, and forces adhesive producers to use alternative compositional materials in order to ensure their survival at low value. . This in turn increases the pollution of the production process and the subsequent problem of product quality.
4 The composition of adhesive-bonded hot-melt adhesives, film-coated adhesives, glazing coatings and other materials is basically based on early foreign data and uses materials that have been eliminated in advanced countries.
4. The composition of the post-imprint basic team is a member of prepress and post-press screening. Compared with prepress and printing production processes, the cultural level is relatively low and the age structure is too large. Assault production and processing, and many rural idle labor temporarily supplemented to the manual operation of the production line. Postpress workers rarely receive systematic training, and most lack basic printing knowledge. Basically, post-printing is in a physically redundant state of labor.
The meeting communicated and exchanged the main results of the current post-press technology innovation and feedback from the application market:
First, the use of PN junction semiconductor temperature devices and digital liquid crystal display development of automatic temperature control system has been used in the vast area of ​​book binding hot back machine, glue machine glue tank, glue book repair and other production lines. The control of thermal power has improved the state of mechanical technology and material use performance.
2. The domestically-made disc type and bar type perfect binding machines have been mass-produced in Shanghai, Jiangsu, Hebei, Liaoning, Henan, Heilongjiang and other places, accelerating the improvement of the process of bookbinding in China to the wireless binding process. The milling and backing slotting knife is improved from V type to U type, which enlarges the cutting surface of the spine milling slot, which is beneficial to the infusion of hot melt adhesive.
Third, to adapt to China's paper substrate and high-volume, short-cycle printing, binding production characteristics of low-temperature high-strength new book binding hot melt adhesive TNS-TYHMA series in the disc, strip and automatic glue production line after use, has passed quality The standard of technical supervision has been determined and the scope of application has been gradually expanded.
IV. "Hua Cui" brand solventless fusion hot melt adhesive pre-coated film and dry composite technology have been applied in the printing, packaging, and surveying and mapping industries in 28 provinces, autonomous regions, and municipalities directly under the Central Government. Completely solve the various problems that occur during the production of laminated film and the post-laminating products.
Fifth, pre-film dry-type composite film has been reduced to a simple hot-pressing technology, technology is concentrated to ensure heat. The HZ-920 liquid-dynamic infrared dual-cavity oil temperature compounding machine is characterized by outstanding technical innovation, easy operation, high efficiency and low consumption, and is gradually becoming a hot spot for investment in the new generation of film-covered equipment.
Sixth, the coating method of drying is developing toward thermal curing, light curing and hybrid curing. Drying methods with deep curing of electron beam or other thermal energy are actively under development. UV coating coatings have been listed on the market in Shanghai, Guangdong, Hunan, and Henan. The water-based glazing coating suitable for the offset printing machine and the film-forming glazing coating can be applied on the printing production line.
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