Screen printing has the characteristics of thick ink layer, rich graphic layers, strong three-dimensional sense, and wide printing materials. Its application in high-end tobacco, alcohol and food packaging cartons has gradually increased. The use of UV screen ink to print matte, refracted, ice, wrinkle and other effects on the cigarette case greatly stimulated consumers' desire to buy. However, due to the low printing speed of flat screen printing, slow curing speed of ink, difficult to control printing quality, and large consumption of printing materials, it cannot meet the needs of cigarette carton scale and mass production. Using high-speed rotary screen printing production line, fast printing speed, high productivity, stable print quality, low consumption, changed the traditional flat screen printing, manual paper, ink supply, suitable for high-speed automatic, large-scale mass production Fold the carton. Web-fed rotary screen printing uses nickel metal round screen printing plates, a built-in doctor blade and an automatic ink supply system. The doctor blade transfers the printing ink from the round screen to the surface of the substrate supported by the impression cylinder. The entire printing process from paper feeding, ink supply, color registration, UV dry bath, etc. are all fully controlled by the computer. The round screen printing plate is made of 100% nickel non-woven fabric material. The mesh hole is hexagonal wire shaped by electroforming. The entire screen surface is flat and even to ensure the stability and precision of the imprint. Suitable for large-format rotary printing, the maximum speed can reach 125m / min, and the screen can be reused 15 times. Therefore, reel-to-roll screen printing can not only meet the requirements of special effects such as frosting, ice blossoms, etc., but also online hot stamping holographic anti-counterfeiting signs, embossing, die-cutting, and easy to realize high-speed automatic printing carton. Environmentally friendly UV silk screen imitation metal etching ink is mainly composed of oligomer (ie photo-curable resin), reactive diluent (ie photosensitive cross-linking monomer), photo (polymerization) initiator and filler. Printing on gold and silver cardboard, UV screen printing metal imitation etching ink quickly cured under ultraviolet light, the surface of the printed matter produces a frosting effect. Under the irradiation of ultraviolet light, the photopolymerization initiator in the UV ink absorbs photons of a certain wavelength and excites to an excited state, forming free radicals or ions. Then, through the transfer of energy between molecules, polymers such as polymerizable prepolymers and photosensitive monomers are brought into an excited state, and a charge transfer complex is generated; the complex is continuously cross-linked to the stage and cured into a film. UV inks selectively absorb photons of ultraviolet light, The drying of UV ink is affected by the total energy of the UV light source and the distribution of light energy at different wavelengths. Solving the matching of UV ink and UV light source is beneficial to accelerate the drying speed of ink, improve labor productivity and energy utilization, and reduce production costs.
cast iron baking, roasting or lasagna dish with multi-layer durable exterior enamel, sports a shiny glazed exterior and offers extreme resistance to cracking and chipping. Superior heat retention and distribution, heats evenly and slowly; tolerates up to 500 ℃. Durable four-layer enamel coating on both the interior never rust s, never needs seasoning .
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