The liquid part of the ink component is called the connecting material, the solid component is the pigment or the dye, and the various auxiliaries. The connection material is a certain viscosity, the glue-like fluid, its function first is as the pigment carrier, the powder-like pigments and other solid particles are mixed together, the color material is evenly dispersed in which, depending on its wetting effect, 3D Printing Resin it is easier to grind the machine on the grinding; second, as a binder, so that the pigment finally can be fixed on the substrate surface To achieve the purpose of displaying text, images, marks, decorations, etc. Also relies on its adhesion, ink can be transferred on the printing press, transmission. Finally, in the printing, the connection material also plays the protective film The function, and presents the essential luster, may even have the protection bottom material the function.
The quality of the connection material, 3D Printing Resin directly affect the performance of the ink, because the connection material in a large extent determines the ink viscosity, viscosity, drying, liquidity and other properties. To get high-quality ink, you must use high quality connectors. The various properties of ink-connected materials determine the various use of printing inks to adapt to the performance of plastic gravure printing inks used in general, including chlorinated polypropylene, polyamide, polyurethane and so on.3D Printing Resin For a long time, chlorinated polypropylene with its low price, excellent adhesion to the OPP of the performance of gravure composite printing inks for the majority of the market, but its biggest shortcoming is that its main solvent is toluene, usually with environmentally friendly solvents such as esters, alcohols solvent to its powerless. solvent-based Polyurethane inks with simple, 3D Printing Resin stable performance, strong adhesion, gloss, 3D Printing Resin excellent heat resistance and other advantages, 3D Printing Resin suitable for a variety of printing methods, especially for screen printing, plastic packaging and composite film.
The polyurethane resin used in the ink is usually composed of polyester/polyether polyol and isocyanate reaction, and the molecular force is about 20,000 $number million. Its solvent mainly benzene, ketone, ester solvents as the main solvent. In the development process can be based on ink factory and printing plant environmental requirements, the use of ketone ester solvents or alcohol ester solvents to prepare the corresponding benzene-free ink resin.
The polyurethane resin for printing inks is mainly synthesized by aliphatic polyester and aliphatic isocyanate as the main raw material, and has excellent optical stability performance compared with aromatic polyurethane, 3D Printing Resin and the film has excellent yellowing resistance.
The ink polyurethane resin molecule chain segment contains urethane, 3D Printing Resin urea carbamate, ester bond, ether bond and other polar groups, with a variety of polar substrates pet, PA and other plastic surface polar groups formed hydrogen bonding, and then formed a certain connection strength of the joint. After the polyurethane resin is made into ink, it is printed on the surface of the polar plastic substrate with excellent adhesion fastness.
The polyurethane resin for ink is usually prepared from polyester or polyether polyol, aliphatic cyclic diisocyanate and two amine/two-element alcohol chain Extender, 3D Printing Resin and the molecular weight is about tens of thousands of. Due to the introduction of urea bond in PU resin, the formation of polyurethane-urea resin (PUU) makes it have good dispersing and wetting properties.