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Four advantages of plastic film water-based gravure ink
The water-based ink gets rid of the organic solvent, which further improves the working environment, eliminates some harmful substances in the solvent-based ink, eliminates the pollution of the packaged goods, and is applied to the corrugated BOPP and PE in the rotogravure printing machine. Printing on PVC and other films can produce packaging and printing products such as food bags, pharmaceutical packaging bags and beverage bags. It is suitable for printing speed of 30~120m/min. It has the characteristics of non-combustible, non-explosive, non-toxic, non-irritating, stable ink, bright color, non-corrosive printing plate, simple operation, good adhesion after printing, strong water resistance, etc. The speed can adapt to the needs of the printing house, and the four-color overprint and the special color printing can be used. Here are some of the four advantages of water-based inks:
1. Does not pollute the atmosphere
VOC (Volatile Organic Gas) is recognized as a major source of global air pollution today, and solvent-based inks emit large amounts of low-concentration VOCs. Since the aqueous ink is used as a dissolving carrier, it emits almost no volatile organic gas (VOC) to the atmosphere, whether it is used in printing or in printing, which is unmatched by solvent-based inks. For the treatment of low-concentration VOCs, most companies choose to discharge directly into the atmosphere, except for the high-cost treatment methods such as activated carbon adsorption. Moreover, during the printing process, the organic solvent in the solvent-based ink is almost completely dried and quickly volatilized, except that the high-concentration VOC above the printing press is treated by catalytic combustion or microbial treatment, and is diffused in the printing shop air. The low concentration of VOC is often directly discharged into the atmosphere. If the proportion of organic solvent in the solvent-based ink is 25%-35%, the amount of VOC directly discharged into the atmosphere is quite amazing. The water-based ink just overcomes this disadvantage. This is the unique feature of no pollution to the atmospheric environment that is being favored by more and more printing and packaging companies.
2, reduce the residual poison on the surface of the printed matter
The water-based ink does not contain organic solvents, which greatly reduces the amount of toxic substances remaining on the surface of the print. This characteristic reflects the good health and safety in the packaging and printing products with strict hygiene conditions such as tobacco and alcohol, food, beverages and children's toys. Nowadays, human beings are paying more and more attention to food safety. There are also strict requirements for the residues of harmful substances in packaging materials and packaging printing. The use of water-based inks is a good choice.
3. Reduce resource consumption and reduce environmental costs
Water-based inks have an inherent property - a higher solids content that can be deposited on the film. Therefore, the amount of coating (the amount of ink consumed per unit printing area) is less than that of the solvent type ink. According to relevant tests, the aqueous ink can reduce the coating amount by about 10% to 30% compared with the solvent type ink. That is to say, printing the same quantity and specification of printed matter, the consumption of water-based ink is reduced by about 10%-30% compared with solvent-based ink.
Moreover, since printing plates need to be cleaned frequently during printing, printing with solvent-based inks requires the use of a large amount of organic solvent cleaning solution; while printing with aqueous inks, the cleaning medium is mainly water. From the perspective of resource consumption, water-based inks are more economical and in line with the theme of a conservation-oriented society advocated by the world today.
4, improve the safety of the working environment
Organic solvents and solvent-based inks are themselves flammable liquids. Organic solvents are easily volatilized and form explosive mixtures in the air. Explosion occurs when Mars is reached after reaching the explosive limit. Therefore, solvent-based inks are quite dangerous during their manufacturing and printing. According to current Chinese regulations, the production of solvent-based inks is classified as hazardous chemical production. It is necessary to have complete production and management conditions for hazardous chemicals in order to obtain a production license. The toxicity specific to organic solvents is extremely detrimental to the health of production workers, and the National Health Surveillance Administration defines such operations as occupational hazards. At the same time, the VOC concentration in the air at the job site is strictly regulated, and the operator must regularly perform an occupational health check to ensure the health of the contact operator. The use of water-based ink printing can effectively solve this problem and greatly improve the safety of the operator's working environment.