Performance test and application of the hottest yp

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Performance test and application of yp-u UV ink PS version - UV ink, also known as UV ink. UV ink is to disperse pigments into film-forming materials composed of prepolymers, monomers, photoinitiators and other substances. When printing, it is convenient to start from a production line and use ultraviolet radiation to form a film and dry the ink

under the irradiation of ultraviolet light, the photopolymerization initiator shown in the data in UV ink absorbs photons of a certain wavelength, excites to the excited state to form free radicals or ions, and then through the transmission of energy between molecules, the polymerizable prepolymer and photosensitive complex are continuously crosslinked, polymerized and solidified into a film

uv inks include UV sanding, UV icing, UV embossing, UV foaming, UV light fixing ink, UV refraction, UV gem and UV glazing oil. UV ink is printed on the surface of the substrate with metallic specular gloss by means of offset printing, silk printing, flexible printing and other processes, and then treated by UV drying equipment. The pattern formed by this process has a luxurious and elegant ornamental effect. UV ink is mainly used for the printing of high-grade, exquisite and unique cigarette, wine, cosmetics, health products, food, medicine and other products, aluminum, iron and other alloys, plastic film, paper and other substrates

uv ink can be cured instantly. Printing, hot stamping, cross cutting and other post printing processing can be completed online on the same production line, so the printing time is short and the efficiency is high

uv ink has good adhesion to various printing materials, and can print polypropylene, polyethylene, polystyrene and other plastic films and other substrates that are difficult to print with traditional ink

uv inks generally do not contain volatile organic compounds, so their viscosity and color will not change during the printing process, which is conducive to the stable control of the printing process

uv ink has good scratch resistance, chemical resistance, good firmness and long-term preservation

uv ink has better printing covering power and good gloss, which is especially suitable for text and image printing of packaging printing materials

uv ink has been used in the printing industry for only 20 years, and the technology needs to be further improved. At present, some of the raw materials used in UV ink have certain odor and toxicity, and some of them have irritating effects on the skin, so the packaging printed with UV ink cannot be used for the inner packaging of food. The pigment of UV ink is dispersed in the middle of the film-forming material. After printing on the substrate and being irradiated by ultraviolet light, the prepolymer and monomer are crosslinked into a film-forming resin under the action of photoinitiator. Therefore, the stability of UV ink is not good, and the storage period is generally only about half a year

the prepolymer and other raw materials in UV ink have a certain corrosive effect on the rubber roller and blanket used for conventional ink printing, so UV ink must use special ink roller and blanket when printing, so ordinary printing machines generally cannot print directly with UV ink, but must use special printing machines

traditional ink only has physical changes in the whole printing process. It changes from liquid to solid, that is, film-forming is that the solvent in the ink volatilizes during the drying process, leaving behind pigments and film-forming trees. The safety belt grease made of 100% high-strength glass fiber, which is newly developed by German kolmaki group. In the printing process of UV ink, the prepolymer and monomer produce chemical changes under the action of photoinitiator to form film-forming resin through UV irradiation. Of course, the pigment is evenly dispersed into the film-forming resin. These chemicals in UV ink often have a certain corrosive effect on the image layer of the printing plate made of ordinary PS plate

ps plate used for UV ink printing, its photosensitive layer must be resistant to the corrosion of chemicals used for UV ink. The traditional film-forming resin phenolic resin system used for the coating of Conventional PS plate is not competent. A new polymer copolymer resistant to the above chemicals must be selected as the film-forming resin of UV ink printing PS plate

with the popularization and use of UV ink, UV ink PS version, a special plate suitable for UV ink printing, is also introduced accordingly. The PS version of Vpu UV ink launched by Fuji company of Japan belongs to this type

in order to meet the needs of domestic users, erjiao began to develop this new product in 2003. After many times of synthesis, screening and formula experiments, a film-forming resin suitable for UV ink PS version was developed. After several small trials, the trial mass production of UV ink PS version was carried out at the beginning of this year

after testing, the solvent resistance of yp-u UV ink PS version produced in trial volume is significantly improved compared with that of traditional yp-ii positive PS version. The sensitivity is basically the same as that of Fuji Vpu UV ink PS version, and all performance indicators have reached the expected goal

(to be continued)

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