The most popular green ink becomes the only way fo

2022-08-06
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Green ink has become the only way for food packaging and printing enterprises

green food consumption has become a trend. However, it is extremely inconsistent with cutting that many green foods do not use green packaging and green printing, but use some toxic and harmful substances as packaging and printing materials. Food packaging is called "special food additive". As the "personal clothing" of food, its safety will directly affect the food quality. Unqualified food packaging will have an adverse impact on human health when the molding cycle is 14 seconds, especially on the health and development of children and adolescents

zhangliming, deputy director of the National Center for quality supervision and inspection of printing and decoration products, said that solvent based inks are mainly used in food packaging in China at present. Such inks contain a large number of harmful solvents, such as benzene, toluene, xylene, etc. if benzene exceeds the standard, it will cause cancer, especially blood system diseases. In addition, the content of heavy metals such as mercury, lead and arsenic in ink is also very harmful to human body

the internationally recognized ink used for food printing must comply with the principle of no transfer; Conventional ink shall not be used when printing the inner surface of food packaging; The printing manufacturer must ensure that all the solvents in the ink evaporate after printing, and the ink is required to be cured thoroughly and meet the corresponding standards of the application industry. It can be seen that the role of ink in food packaging and printing cannot be neglected

food packaging calls for environmental friendly ink products

the safety of printing products will form a new green trade barrier for China. From the perspective of the production process of printed matter, ink has undoubtedly become the "protagonist" of this complete industrial chain. Now most countries in the world advocate the use of environmental friendly ink, alcohol soluble ink and water-based ink, especially water-based ink is more and more widely used as a green ink

water based ink: water based ink is the ink used in most flexographic packaging and printing at home and abroad. It is mainly made of water-soluble resin, organic pigments, solvents and related additives through compound grinding. Water soluble resin is the binder of water-based ink. Water soluble acrylic modified resin is often used as binder in China. It has significant advantages in heat resistance, weather resistance, chemical resistance, pollution resistance and gloss. Whether it is directly dispersed and dissolved or synthesized into polymer lotion, it shows excellent performance. The water-based ink does not contain volatile organic solvents, which can not only reduce the residual toxicity of printing products, Moreover, it can prevent fire caused by static electricity and flammable solvent. It is a new "green" printing ink. Water based ink is also the best alternative to benzene soluble ink

UV curable ink: UV curable ink refers to the ink that is cured by the crosslinking reaction of the binder in the ink under the irradiation of a certain wavelength of UV light, which changes from liquid to solid. Before the binder dissolves, the macromolecular prepolymer forms an ink film firmly. UV curing ink is mainly used for flexible printing of soft substrates. It consists of prepolymer, reaction diluent, pigment, additive, photoinitiator/composite

electron beam curing ink: electron beam curing ink refers to the ink that can quickly change from liquid to solid under the irradiation of high-energy electron beam, also known as EB ink. Most of the food and beverage packaging industry adopts electron beam curing printing, and the printing method is offset printing. EB ink adapts to the development direction of high-speed, multi-color primary printing in the printing industry. The main difference between EB ink and liv curing ink is whether there is a photoinitiator in the binder. When a certain amount of photoinitiator is added to EB ink, UV curing can also be carried out. EB can cure a thick ink layer. Since no photoinitiator is required in the ink, the cost is relatively lower than liv ink, but the investment of electron beam curing equipment is higher than liv curing

digital printing ink: with the increasing demand for personalized packaging, digital printing technology has penetrated into the food packaging and printing industry. Using digital printing technology can achieve high enough image resolution, and can ideally reproduce the 266 doors and roller shutter details of the image. Most of the printing materials are foil, metal aluminum, pet (polyester), paper, etc., and are suitable for printing web paper. Solvent resistance is also very important for electrostatic digital printing. Printing materials with poor solvent resistance will not be able to complete subsequent processes, such as glazing, film coating, etc

with the tightening of the national policy on food packaging quality and safety, environmental protection issues have become increasingly important. Food safety has become the focus and urgent task of the world, and has become the criterion for the development of environmental friendly inks. Today, with the increasing awareness of environmental protection, people have higher requirements for the development of ink. The trend of ink environmental protection has become the trend of comac-c (9) 19, which is accelerating its development. China's packaging and printing enterprises must unswervingly follow the path of green development in order to adapt to the development of the times

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