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Plastic silk screen printing ink classification and prerequisites
2015-06-19 Reads : 39
(1) The classification according to the substrate by chemical name substrates can be divided into: polyethylene, polypropylene (non-polar) ink. Polyvinyl chloride, polystyrene, ABS polycarbonate (polarity) of the ink. According to the shape of substrates can be divided into soft and hard plastic ink plastic ink. (2) the dry way classification evaporation drying inks, UV-curable inks, oxidative drying inks. ① volatile drying ink: screen printing an ink is used up. The main components of the ink film is a polymer material, solvent evaporation after printing, the polymer material to form an ink film. Such volatilization drying process is reversible, i.e., the ink film can be dried using a solvent redissolved. After the ink is transferred to the substrate, the ink film will be solvent inks, solvent evaporation occurs first. Solvents in the ink by the action of vapor pressure diffusion in the atmosphere, the ink film formed on the surface film, then volatilized by film. In this drying process, the general internal slow drying, accelerate drying hair sometimes need to be. Volatile type ink, easy to use, fast drying general, it is widely used. ② UV curable ink (UV ink): UV inks can produce photochemical reactions, in a very short period of a few seconds can be fully cured in plastic printing with more and more. The main component of the ink is photopolymerizable resin, initiator, pigment and additives, will in principle with an organic solvent. ③ oxidative drying inks: the ink contains small molecular weight polymer, oxidized in the air, by heat, light or chemical reactions and the formation of reactive species polymer film. This ink after printing to the substrate surface, generally require heating to promote hardening. 2. Plastic screen printing ink must have the condition ① ink dried on the plate should conjunctiva, and when printing to a desired substrate surface dried quickly fixed, and has good adhesion fastness. ② ink should have a loose, short, thin, slippery characteristics to ensure the ink on the plate easy to apply evenly. Under the conditions by a small force easily over the net. Requirements printing graphics clear, no offset phenomenon. ③ When the ink is applied on the printing plate, ink viscosity, viscosity, consistency should be a certain stability, to ensure the smooth consistency and printing quality of printing. ④ After printing, the ink on the plate to facilitate the clean, to ensure that the plate can be reused. ⑤ to ensure that Indian goods have a certain color density. For color patterns, to ensure that they have a normal tone. 3. The main components of the plastic screen printing ink (1) colorant include pigments and dyes. In addition to the pigment in the ink color effects, but also the ink hiding power. In addition to light resistance, heat resistance, solvent resistance, chemical resistance of the ink it is also affected. (2) binders binders is part of the ink fluid. It plays the role of the link, so that pigment, fillers and other solid material dispersed therein to facilitate uniform transfer of ink when printing. It's another important role is to make the ink can be dried on the substrate surface, anchor and film. Link material is a key factor in determining the performance of the ink, the different types of ink, usually use a different nature binders. Binders include resins, oils, solvents, etc. (3) auxiliary additives to improve printability of ink and various add various auxiliary agents, mainly defoamers, diluents, plasticizer, ultraviolet absorber, dried adjusting agent. Usually only join when printing.
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Droit d'auteur © GuangDong ICP No. 10089450, Changzhou City, un rouge séchage Equipment Co. Tous droits réservés.
Support technique: ShenZhen AllWays Technologie Développement Co., Ltd.
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Vous êtes le 21112 visiteur
Droit d'auteur © GuangDong ICP No. 10089450, Changzhou City, un rouge séchage Equipment Co. Tous droits réservés.
Support technique: ShenZhen AllWays Technologie Développement Co., Ltd.
AllSources réseau's désistement: La légitimité de l'information de l'entreprise ne s'engage pas à toute responsabilité de garantie