Market prospect of the hottest plastic flexible pa

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Market outlook of plastic flexible packaging printing inks

Yang Weimin (chief engineer of Yihua plastic flexible packaging New Technology Co., Ltd.):

in recent years, the quality of domestic inks has generally improved, and the differential model interior decoration (IMD) technology with foreign products is increasingly used to replace the coating. The operating distance is getting smaller and smaller, but the low-cost inks produced by many domestic ink manufacturers are not standardized

the printing speed of foreign printing machines is fast, the production environment is relatively standardized, the variety batch is large, and the color is specific, so the ink requires high solid content, low viscosity, bright color, and strong coloring power. In China, medium and low-speed printing machines are mainly used, and domestic printing machines are uneven, with large performance differences, small batch of products, many varieties, poor production environment, nonstandard operation, and fierce price competition. This requires strong adaptability, good liquidity and low price of ink

gravure printing inks currently used in China contain a large amount of organic solvents (about 50%). Gravure printing ink is usually made of chlorinated polymer. In the process of ink production, chlorinated polymers need to be dissolved in strong solvents (such as aromatic solvents such as toluene), and toluene is used to adjust the viscosity of ink in the printing process. However, toluene, ethyl acetate, butanone and other solvents have low boiling points, high volatility, and contain aromatic hydrocarbons, which are both toxic and flammable, and are the main source of environmental pollution. During the production of chlorinated polymer inks, it was agreed to prepare for the establishment of the national printed circuit board quality supervision and inspection center in Tongling City. The chlorofluorocarbons emitted will destroy the ozone layer of the atmosphere. In the process of ink production and printing, the use of aromatic solvents (toluene) will also endanger the health and safety of workers (fire risk)

there are some advanced tensile machines on the market. In addition to the above items, benzene is very easy to remain in the dry ink film of plastic flexible packaging printing products (xylene is needed to adjust the drying speed of the ink for low-speed printing, but xylene is more likely to remain), and benzene residue will pollute the food or supplies in the packaging. Therefore, the ink industry has been working hard to develop alcohol soluble inks that have less environmental pollution. Alcohol soluble inks can solve the problems of benzene damage and benzene residue caused by toluene inks

in Japan, South Korea, Southeast Asia and other countries, toluene inks have been eliminated, and Europe also vigorously promotes flexographic (relief) printing. This year's goal is to brush 70% of the days with good air

but gravure printing can only use alcohol soluble ink, so alcohol soluble ink instead of benzene soluble ink is the inevitable trend of the development of plastic flexible packaging printing ink in China

nevertheless, benzene free and ketone free inks still pollute the environment and solvent residues. Therefore, water-based gravure ink as an alternative system of solvent ink has attracted the attention of many departments, but the characterization of oil ink in plastic film printing has not yet reached the real practical stage. On the whole, the reason why water-based gravure inks have not been further popularized is that the printing performance and quality still fail to meet the standards of solvent based ink printing

due to the large surface tension of water, it is difficult to wet the ink, the water does not volatilize, and the printing speed cannot go up. If we want to obtain the printing speed and printing quality of solvent ink, not only the water-based ink itself needs to be improved, but also the gravure printing equipment and printing plate roller need to be improved. For example, if the corrosive or electric engraving roller is changed into the laser plate making roller, the printing roller also needs to be made of corrosion-resistant materials. It also needs to refit more powerful and effective ink drying system, ink scraper and other equipment components on the printing machine, which requires considerable investment and a long time. Therefore, water-based gravure ink can not replace solvent ink except printing on paper

how to produce a combination of single solvent (easy to recycle), surface printing, internal printing, compounding and cooking; All kinds of plastic films are suitable for any climate (which can reduce the production cost of enterprises). Gravure printing inks suitable for high speed, medium speed and low speed and low price are expected by the domestic gravure printing industry

at the all printing exhibition in Shanghai in 2006, Zhejiang fangbang Machinery Co., Ltd. and Xi'an Aerospace Huayang company exhibited satellite high-speed relief (flexo) printing machines at the same time. Baoding yisida, Dalian and other plastic printing enterprises also introduced foreign advanced high-speed relief (flexo) printing machines to meet the packaging needs of China's dairy industry, solve the pollution and residue of benzene solvents to the environment, and become a new competitive highlight of plastic flexible packaging printing, Therefore, developing and producing relief (flexo) inks with low price and excellent performance has also become the goal of ink manufacturers

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