Polyurethane adhesive for ink

Water-based inks are listed as the first choice for environmentally friendly printing. Room temperature crosslinked waterborne polyurethane adhesives can be used to prepare single-component polyurethane water-based inks suitable for gravure printing. The water-based inks have high light and water resistance, strong adhesion, adjustable dryness, vivid colors, clear layers, non-toxic, non-flammable, and weatherproof. Sticky and easy to control, compared with other water-based inks, has a wide range of adaptability to a variety of substrates. Polyurethane-polyacrylic acid. As a water-based ink binder, the performance of the polyurethane adhesive and the polyacrylic acid vinegar are integrated in the drying process of the ink film print, and thus the modified emulsion also has a good fastness to the film. The base films used in the color printing industry mainly include poly F3B film, nylon film, polypropylene film, polyethylene film, etc. The key to selecting inks lies in their good adhesion to these kinds of base films. The use of vinyl chloride-acrylic acid, which contains a light group in the molecule, is synergistically reacted with a macromolecular diol, a small molecule chain extender, and toluene diisocyanate via an ethyl E3B copolymer to produce a novel polyurethane adhesive that can effectively Improve the quality of color printing inks.