New alcohol soluble composite ink
In the printing of packaging bags, there is toluene in the ink or solvent used. Because the boiling point of toluene is 110°C or more, it is impossible to completely evaporate during the printing and compounding process. Therefore, the odor may remain in the packaging bag. In the past, color printing manufacturers that specialize in producing milk powder packaging used a lot of financial and material resources to control the odor problems of packaging bags, such as the introduction of high-speed machines and the use of fast-drying solvents, but they still could not fundamentally eliminate the problem of solvent residues. Chao Lifu 303LV alcohol compound ink is developed for pharmaceuticals, high-grade puffed foods and other packaging requirements without odor residues, as long as used for PET film, NY film composite in India, packaging structure such as PET / AL (aluminum plating) // PE, PET(NY)//PE and other medicines, puffed food packaging. The ink does not contain benzene solvents. The alcohol ester solvent is used as a diluent. The release of the solvent from the resin is good. The residual solvent is very low after printing. The specific test parameters are shown in Table III and Table IV.
In the use of 303LV ink can be used alcohol-soluble or ester-soluble adhesives, the compliance strength of the two adhesives can meet the actual requirements of the use of bags. However, alcohol-soluble compound inks are best used with alcohol-soluble glues to achieve the best composite strength while ensuring that the solvent residues in the bags are kept to a minimum. If ester-soluble polyurethane adhesives are used, ethyl ester residues may result. Through the composite of different adhesives, the composite strength test of 303LVI ink is shown in Table 5.
Sample production description printing conditions 303LV ink colored overprint, white ink auxiliary bottom, speed 60 meters / min, viscosity 16 ~ 18 seconds / 3 # cup, drying temperature not less than 60 °C, PET film is 12um
The compounding conditions were 28% on the sizing, 110-line roller coating, and the speed of 70m/min. The 50°C oven curing environment-friendly ink was the only way to achieve green printing. Alcohol-soluble and water-based inks can significantly reduce environmental pollution, protect the health of printing workers, and promote the development of printing to non-toxic operations. China has now begun to formulate relevant packaging regulations, so that the health and safety of food packaging requirements and international standards.