Difference between environmental protection ink and non environmental protection ink
UV curable ink: UV curable (UV) ink refers to UV irradiation, the use of different wavelengths and energy of ultraviolet light to make ink film and dry ink. Different ultraviolet spectra can be used to produce different energy, and the monomers in different ink bonds are polymerized into polymers. Therefore, the color film of UV ink has good mechanical and chemical properties. The main advantages of UV ink are: (1) no solvent; (2) drying speed, less energy consumption; (3) good luster, bright colors; (4) water resistance, solvent resistance, good abrasion resistance. In UV inks, photoinitiator is a light sensitive compound that absorbs light into a free radical and transfers the energy to a photosensitive molecule or an optical crosslinker that causes the UV to undergo a UV curable reaction. At present, UV ink has become a mature ink technology, and its pollutant emission is almost zero. In addition to UV ink does not contain solvents, as well as not easy to paste version, mesh point clear, process of bright light, excellent chemical resistance, dosage province etc..
Water based ink: the biggest difference between water-based ink and solvent inks, in its use of solvent is water instead of organic solvent, significantly reduce VOC emissions, to prevent air pollution, does not affect human health, not easy to burn, ink stable, bright color, corrosion plate, simple operation, low price India, good adhesion, water resistance, quick drying, which is especially suitable for food, beverage, pharmaceutical and other packaging and printing products, is the world recognized environment-friendly printing materials, is now all printing ink only by the food and Drug Association recognized the ink.
Water based UV ink: water-based UV ink is the new direction of UV ink research. The viscosity of prepolymer in common UV ink is very large, and it needs to be diluted with active diluent. The diluent acrlates currently used with different degree of skin irritation and toxicity, so in developing low viscosity prepolymer and low toxicity of reactive diluent at the same time, another development direction is the study of waterborne UV ink, namely with water and ethanol as diluent. At present, water-based UV ink has been developed and has been applied in some printing. In addition, mainly in flexo printing in the role of alcohol soluble ink is also a very small pollution of the ink, mainly used in food, drugs, beverages, tobacco and daily necessities of contact with the human body, packaging, printing and so on.
