Analysis on the market demand of printing raw and

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Analysis on the market demand of printing raw and auxiliary materials in China

printing raw and auxiliary materials refer to a part of printing equipment with small consumption in the printing process but great impact on the printing quality and stability, such as printing cots, rubber blanket, fountain solution and cleaning and maintenance chemicals

in addition to paper, ink and PS plate, the printing equipment used in offset printing also includes equipment accessories, chemicals, cots and blanket. At present, most domestic printing enterprises are aware of the important role of paper, ink, PS plate and mechanical accessories in the printing process. However, when they use first-class paper, ink and PS plate in printing equipment, or even new equipment, they will still find that printing problems and printing failures continue to occur. In fact, even if the same paper, ink and PS version are used, what elements should be considered when using different auxiliary equipment to print on two printing presses? When selecting the tension machine fixture, we will find the difference in the stability of printing quality

however, at present, many printing plants use printing aids of different standards to print together, or rarely form a series of printing aids suitable for their own requirements according to their own production characteristics, which often leads to some printing failures. For example, the automatic cleaning system is blocked, the rubber roller absorbs impurities, and the printing pressure is too large. Therefore, in order to ensure the stability of printing, enterprises need to select their own high-quality printing auxiliary equipment according to their own characteristics and the characteristics of auxiliary equipment, so as to form a complete series of printing auxiliary equipment

with the rapid development of lithography, the requirements for printing quality are becoming higher and higher, and in high-quality printing, printers have high requirements for the smoothness of printing. In order to ensure that the printer can convert the elongation into the tension value smoothly and prevent printing problems, the role of high-quality serial printing auxiliary equipment is becoming more and more prominent

I. printing blanket

printing blanket mainly includes offset printing blanket, iron printing blanket and various printing pad blanket, of which offset printing blanket is the most important. Lithography is the most widely used printing method among all printing methods, and ink, PS plate, paper and blanket are the intermediate media in lithography. Tensile test is one of the most widely used methods to study the mechanical strength of materials. 1. Generally, the two ends of material samples are clamped on two clamps with a certain distance. Its importance lies in whether the ink on the printing plate can be completely and quickly transferred to the paper, This puts forward high requirements for the variety and quality of rubber blanket, which is a very important material in offset printing

the development and production of domestic offset blanket began in the mid-1960s. It was jointly developed by Shanghai printing equipment factory and Shanghai Printing Technology Research Institute. By the early 1970s, there were only two domestic enterprises producing ordinary blanket, with an annual output of about 20000 square meters, and many of them had to rely on imports. By the mid-1980s, the production of domestic ordinary offset blanket was about 100000 square meters, and the imported blanket had decreased. However, the air cushion blanket could not be produced in China and was completely dependent on imports. By the mid-1990s, the domestic common offset blanket technology had matured

the air cushion blanket market is divided into three parts: the first part is the Meiji 9600a air cushion blanket produced by Shanghai Meiji rubber products Co., Ltd., which is jointly invested and established by Japan Meiji Rubber Co., Ltd., Shanghai printing equipment factory, China National Printing Materials Corporation and China National Publishing and Foreign Trade Corporation; The second is the imported air cushion blanket of various brands; The third piece is domestic air cushion blanket. Statistics show that in 2002, the actual output of printed rubber blanket nationwide was 990200 square meters, an increase of 26.79% over the previous year. The sales revenue was 220million yuan, an increase of 24% over the previous year. Among them, air cushion rubber blanket covers 381000 square meters, an increase of 26.16% over the previous year. From the perspective of development trend, it shows the momentum of booming production and marketing. From the perspective of market development, the use of air cushion blanket is growing faster than expected. Now more than 80% of the air cushion blanket is used in the South and coastal areas. At present, domestic rubber blanket manufacturers are actively developing air cushion rubber blanket, but due to many reasons, such as raw materials, processes, special equipment, design concepts, testing equipment, etc., the vast majority of domestic air cushion products are low-grade, and there is still a certain gap compared with high-quality air cushion rubber blanket

II. Rubber roller

rubber roller is a rubber product made by vulcanizing the rubber layer on the metal core. Compared with metal rollers, rubber rollers are elastic, acid and alkali resistant and rust free, so they are widely used in industrial sectors such as papermaking, printing and dyeing, rice milling, agriculture and other industries. Rubber cots firstly replace metal rolls as mechanical conductive or supporting parts; The second is to use the elastic deformation of the rubber layer to make the processed object subject to certain pressure and produce the squeezing effect

the main materials of cots are: natural rubber, nitrile rubber, silicone rubber, polyurethane, etc

the printing cot is also a very important auxiliary material for printing in the printing press. The high-end printing press has higher requirements for it, especially the ink roller and water roller. From the current domestic production situation of the printing cots, most of them are low-grade products. Most of the supporting ordinary offset press manufacturers renovate the old cots for the printing factory. They can only be used on the medium and low-speed printing presses, and their service life is not long. Most of the cots on high-end offset printing machines above multi-color machines still rely on imports, some are directly imported, and some are made of imported mixed cots. With the development of offset printing towards high-speed polychromism and the enhancement of environmental awareness, alcohol wetting will also be controlled, and the demand for high-quality printing cots by printing machines will also be increasing

III. ink cleaner

gasoline was first used to clean the ink on the offset press. Gasoline is divided into leaded gasoline and unleaded gasoline. Although gasoline has a strong ability to remove ink stains, and the effect of cleaning ink is very good, because it does too much harm to human body, causes serious environmental pollution, and is a hidden danger of fire, gasoline, known as the first generation of ink cleaner, is gradually eliminated

as early as after World War II, some countries with developed printing industry and environmental protection in the world began to research and develop new ink cleaners. The new offset ink cleaner is a liquid mixed with solvent, rubber anti-aging agent and emulsifier. It can be used by adding a certain amount of water. It has good washing power for the ink, and will not make the glue layer of the ink roller expand or shrink. The cleaning agent with flash point of 21 ℃ ~ 55 ℃ is a flammable liquid, which is called the second generation of ink cleaning agent. The cleaning agent with flash point of 55 ℃ ~ 80 ℃ does not contain aromatic substances and chlorinated hydrocarbons. The components of the solvent can be re distilled without environmental protection problems. It is safe to use because of its low volatility and non combustion. It is an internationally recommended ink cleaning agent

the process of cleaning the printing press has obviously affected the social and production benefits of the printing industry. In addition, in terms of cleaning and maintenance of cots, many manufacturers are doing market work in this area. Now many printing plants, especially those in coastal areas, have paid more and more attention to the important role of maintenance in printing, and high-quality ink cleaners have broad development space

source: China Packaging News

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