Classification plastic screen printing inks and ink prerequisites have evaporation drying inks, UV-curable inks, oxidative drying ink. ① volatile dry ink: screen printing is one of the most used ink. The main component of the ink film is a polymer material, after solvent evaporation PP printing ink wholesalers, its high-molecular substance to form an ink film. This evaporation drying process is reversible, i.e., the ink film drying solvent may be used redissolved. After the ink is transferred to the substrate, the ink film will have an ink solvent, evaporation of the solvent occurs first. Solvent in the ink by the action of the vapor pressure of diffusion in the atmosphere, the ink film formed on the surface of the ink film, and then volatilized by the liquid film. In this drying process, generally interior slower drying, sometimes need to be accelerated drying hair. Volatile ink, the ink is easy to use anodized wholesalers, general dry faster, so it is widely applied. ② UV curable ink (screen printing inks): UV inks can produce photochemical reactions, in a very short period of a few seconds, you can 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: Ink containing low molecular weight polymers, oxidized in the air, by heat, light or chemical reactions of reactive species to form a polymer film. This ink after printing to the substrate surface, generally require heating to promote hardening. How to improve the wear resistance and adhesion of UV varnish? UV printing inks are often used to work in a printing material, and there is a surface finishing process called UV coating is achieved by means of UV inks. Today we'll talk about UV coating. Box printing enterprises (especially export business in Japan and Europe and other countries and regions, box printing companies) often encounter such problems: After printing UV coating, UV varnish coating abrasion and adhesion is poor, especially the use of metallic inks printed materials (gold or silver ink ink) printing with UV coating and then when this phenomenon is particularly prominent. Under normal circumstances, the box printing companies tend to solve this problem by replacing the UV varnish. In fact, we should not only be limited to the idea of ??replacing the UV varnish, but should divergent thinking, the idea of ??converting to change the production process line or box to adjust the relevant aspects of the process parameters. Conventional corrugated box production process route is: ordinary printing plate and cutter → → → over the UV Primer UV mounted corrugated surface oil → → → die-gluing. After several tests, I will improve the corrugated box production process methods are summarized below. (1) plate and cutter → UV inks + UV coating line. Test proved plating ink wholesalers, this production process can greatly enhance the UV varnish on metal wear resistance and adhesion of UV inks, UV metallic inks but relatively rare in the market, require special customization, expensive, and printing must adopt UV presses. In general, most small businesses do not have UV box printing presses, so this part of the production process only applies to box printing business, general promotion of little significance. (2) ordinary printing plate and cutter → → screen printing UV coating. This production process can be resolved UV varnish on the metallic ink abrasion resistance and poor adhesion problems, but higher UV Varnish screen printing cost, and environmental performance is less than water-based UV varnish. In addition, many companies are not fully automatic folding carton printing screen printer, only the lower productivity of semi-automatic screen printing machine, so this production process only applies to part of the box printing business, not worth popularized. Plating ink printing equipment wholesaler _ constant Yawei (certified) _ ink provided by Dongguan Heng Heng Li Yawei printing equipment materials firm. Dongguan Heng Li Heng Yawei printing equipment materials firm (dghyw88.1688.com) (www.hengyawei.com) is Dongguan, plate making, printing supplies leader, over the years, the company implementing the scientific management, innovation and development, honesty and trustworthiness guidelines, and satisfy customer needs. Printing equipment in constant Yawei led the staff warmly welcome all inquiries negotiations to create a constant Yawei printing equipment a better future.