Xiang Jie non-contact inkjet printing inks of the past and the future – printing ink, ink-IT industr

Article by hi joiney

Automatic non-contact inkjet printing technology is used to form the required electronic control mark (such as production date, shelf life, batch number, etc.) print in the irregular surface of the product packaging, production line with synchronization. Automatic non-contact inkjet printing technology is used to form the required electronic control mark (such as production date, shelf life, batch number, etc.) print in the irregular surface of the product packaging, production line with synchronization. The technology is widely used in food, beverage, pharmaceutical, chemical and other industries. The particularity of its technology require ink must have a certain conductivity to meet the needs of electronic control; to have better adhesion to the surface of the product packaging to ensure strong adhesion; coloring agent to be bright, weather resistance; print smooth, quick drying print mark. With this level of ink is basically no domestic production, mainly relied on imports. 1, ink Development 1.1 solvent In inkjet printing ink, solvent ink as the carrier plays a decisive role performance is good or bad. Solvent required to be able to quickly dissolve both colorants, adhesives and other components, but also there just right of the volatility, the inkjet printing process can effectively control the drying rate. During the experiment, found that two or more solvents selected number of carbon atoms ketone and alcohol use by mixing the best, adding the total weight of ink is about 70% to 90%. 1.2 colorants What type of coloring agent, whether to be sufficient in a solvent solubility, and miscibility with other components in the ink is good, bright colors, weather resistance, good aging properties. Study found that pigment addition of organic chromium complex to meet the above requirements, also selected organic solvents with good conductivity, electrical conductivity can provide some. The amount of ink about ink colorants added weight of 3.0% to 8.0%, to achieve the required depth of color and subject. 1.3 adhesive Binder for ink-jet printing ink of the main components, its role is mainly as a pigment carrier, enhanced printing surface adhesion markers. Asked adhesives can completely dissolved in a solvent, and good miscibility with other components. Comparison of cellulose by the adhesive on the adhesive surface is good, as the preferred binder, adding volume to the total weight of ink 5.0% ~ 10.0%. 1.4 conductance regulator Electronic control to meet the needs of ink requires a certain degree of conductivity, so need to join conductance regulator. In addition to the ink colorant to provide a conductivity value, but also choose to ionizing organic salt or salt solution for conductance regulator, for example, tetramethyl ammonium acetate in the selected solvent has good solubility, can provide sufficient conductivity value, adding the total weight of ink volume of 0.5% to 2.0%. 1.5 Other Additives In the ink need to join some other additives to improve ink performance, such as: adding 1.0% to 5.0% of the anti-evaporation agent to improve the stability of ink, and enhance the luster print marking, ink jet nozzle to prevent drying; test used N-methyl pyrrolidone, glycol ethers and phthalate esters as anti-evaporation agent. And adding silane coupling agent to improve the adhesive surface of the substrate adhesion by adding surfactants to reduce surface tension of the ink to improve the performance. 2, preparation and application of ink2.1 Preparation In closed equipment, the use of the coloring agent and the solvent mixture, stirring until all the dissolved colorant; then were added adhesive, conductance regulator, anti-evaporation agent, coupling agent and surface active agent, stir until the Add components mixed. Prepared using the method of ink, its physical and chemical indicators and a comparison of known samples

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