When will the most environmentally friendly gravur

2022-08-02
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With the deepening of market economy and the acceleration of global economic integration after China's entry into WTO, packaging and printing have higher requirements on the price and quality of raw materials. It is mainly reflected in the following aspects:

reduce the cost of using the four socket head screws above

reducing the cost and obtaining the maximum profit is the premise for the survival and development of enterprises, and packaging and printing plants are no exception. Although the ink only accounts for about 15% of the printing cost, the printing factory has never given up its efforts to reduce the ink cost, and hopes that the ink supplier can provide ink products that meet the printing requirements with the best cost performance

improve ink colorability. The printing factory hopes that the ink manufacturer can improve the coloring performance of the ink and print with quantitative ink to reduce the printing cost. However, the amount of ink is closely related to the colorability of the ink. In the case of a certain amount of ink, the higher the colorability of the ink, the more prints, the greater the profit

reduce the use of additives and use supporting additives. The printing factory hopes that the ink used can be used directly in production, without adding or adding little additives, and only solvents can adjust the viscosity of the ink. Because the additives will increase the printing cost, increase the preparation time before printing, waste manpower, and affect the stability of inkability. On the other hand, the additives are required to have certain pertinence. The additives should be matched with the ink, with obvious effect and convenient use

improve the adaptability of ink to high-speed printing. At present, the speed of gravure printing machine in China is generally about 150m/min. the increase of printing machine speed will reduce the operating cost. Increase benefits. Therefore, it is hoped that ink manufacturers can provide gravure printing ink with printing speed of 300 m/min or even higher

technical performance requirements

requirements for ink hue. It is hoped that the hue of the ink will be more stable, because when printing a large number of products, it is necessary to continuously add oil ink that experts believe. If the hue of the ink is unstable, it will lead to inconsistent print quality

requirements for ink gloss. The ink with good gloss looks bright, but in actual printing, in order to reduce the cost, some solvents are often added to the ink, which will affect the gloss of the printed matter. At the same time, too much humidity in the workshop will also affect the gloss. Therefore, users hope that while reducing the cost, the ink can still maintain high gloss, and has a certain stability, not affected by external conditions

requirements for ink viscosity. The printing factory hopes that the viscosity of the original ink can be properly increased. When the ink leaves the factory, the viscosity shall be controlled within 30 - 60 seconds (coated with 4 \. For high-speed gravure printing, the viscosity of the original ink is less than 40 seconds, and the viscosity after dilution is 12 - 15 seconds; Medium speed printing, the original ink viscosity is controlled at 40 - 50 seconds, and the diluted viscosity is 16 - 18 seconds

requirements for ink fineness. The packaging and printing of metal ring and rectangular test block is developing towards refinement, and the printing equipment is becoming more and more sophisticated, requiring the fineness of the ink to be controlled at 15 μ M or less. Too thick ink not only damages the version, but also easily causes quality problems such as knife lines

requirements for water-based inks. Water based gravure printing ink has the advantages of reducing air pollution, facilitating safe production and reducing potential safety hazards. From the perspective of printing quality, the water-based ink volatilizes slowly, so the high gloss part inks better

however, the water-based inks currently used still fail to meet the standards of solvent based gravure inks in terms of printing performance and printing quality. The main reason is that the surface tension of water is high, up to 7 two × 10 - 2n/m, which makes it difficult for the ink to wet with the substrate, and it dries slowly. The printing ink is not bright enough, so the water-based gravure printing ink is still not popular in China

requirements for alcohol soluble gravure printing ink. As the water-based gravure printing ink can not fully replace the toluene ink, and the cost is too high, the packaging printing factory hopes that the ink manufacturers will develop alcohol soluble gravure printing ink as soon as possible. Alcohol soluble gravure printing ink has the characteristics of low odor and no benzene, which can effectively reduce the causes and troubleshooting of such failures: (1) the health damage caused by the uneven installation of the hardness tester and the impact of the residual solvent on the packaging products can be effectively solved, but the use cost is 20% higher than that of the ordinary solvent based ink. Therefore, reducing the cost has become the most important requirement for alcohol soluble printing ink. At the same time, it also requires no dirt, flexibility, grease resistance Good abrasion resistance and heat resistance. The selected pigment must have certain sun resistance

looking forward to the early launch of environmental protection gravure printing inks

food packaging has higher and higher requirements for environmental protection of products. Similarly, environmental protection has also put forward requirements for cigarette labels and other packaging and printing products. So far, gravure printing still uses solvents such as toluene to adjust ink viscosity, which will cause certain environmental pollution. In order to meet the requirements of environmental protection, the performance of ink must be completely changed to produce environmental friendly gravure printing ink to meet the production needs of packaging and printing products

reprinted from: China Packaging News

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