Application of the hottest surface decoration scre

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Application of surface decorative printing ink (III)

3. The effect of stress

an application similar to the function of anti-corrosion ink, such as the covering ink for sandblasting (see Figure 6). Cover the parts outside the sandblasting surface for sandblasting, and peel off the covered parts with warm water after sandblasting. The uncovered part forms the desired image. The covering ink for sand blasting needs a thick and elastic film and is easy to peel off. It is an elastic UV elastic ink, which is used for sand blasting of glass containers and stainless steel doors and windows

there is also a way to greatly increase the internal stress of UV curing resin and cooperate with special release agent to try to reduce the bonding function. It becomes a peelable covering ink that is very easy to peel off. Even if the printing ink film is not broken in the middle of peeling, it is formed by a strong and tough film. It is used for covering parts such as painting, or as temporary protection of material surface and printing surface, instead of protective film

functional inks with chemical effects

1. Using the functions of absorption and adsorption

CD-R and CD-RW used as information recording media, users want to use a printer or note taking tools to make printing marks on the surface of the CD after use, so as to adapt to this purpose, they have developed UV inks that give them the adaptability to print words carefully. This UV varnish is made of hydrophilic oligomer monomers into adhesives, Use silk printing to coat the CD-R surface and cure it with ultraviolet light. In addition, use the water-based oil of the inkjet printer. Take the mechanics laboratory as an example. Under normal circumstances, the ambient temperature of the experimental machine is required to be (10 ~ 35) degrees Celsius. Too high or too low temperature will affect the operation of the experimental machine. Ink or water-based and oil-based note taking tools can also be used to print words. After printing, the ink seepage is less and the drying is faster

in addition, UV inks suitable for heat transfer printers have been developed

functional inks for surface decoration

1. Decoration using pigments and fillers

uv inks can produce excellent surface decoration effects that volatile dry inks cannot obtain in terms of ink film hardness, thick film property, gloss, friction resistance, etc. Therefore, UV inks are used more in surface decoration, so there are anti dazzle, anti-corrosion A variety of surface decoration varnishes, such as good scratch resistance and gloss removal processing (see Table 3)

these functions all depend on fillers, which use resin particles such as polyurethane beads and materials such as silicon powder and mineral powder

(1) mirror metal ink

recently, metal tone color printing has appeared in many fields. As ink materials that can express this metallic tone, metal powder pigments (aluminum powder, copper powder, stainless steel powder, bronze powder, tin powder, etc.) and pearl gloss pigments (pearl powder, etc.) are often used, of which aluminum powder (made into aluminum paste) is the most commonly used (see table 4). However, these Metallic Pink materials appear concave convex and particle sense on the printing film surface after printing, resulting in light diffusion, which makes mirror processing very difficult

special aluminum paste pigments are used (evaporate aluminum onto the film, dissolve and disperse it in the solvent), and the supply state of transparent printing is perfect. The material is printed on the back. While giving play to the smoothness of the material, silk printing is used to achieve a gloss and brightness close to the surface of the evaporated foil. The mirror metal ink can complete this kind of metal printing

mirror metal ink is used for back printing on transparent plastic materials (polyester, polycarbonate, polypropylene, vinyl chloride). It is an ink that shows mirror polishing through transparent materials. It can be dried at room temperature (20 ~ 30min). If forced drying (80 ℃ 10 ~ 15 rain, 60 ℃ 15 ~ 20min) is used, the mirror effect will be reduced. The physical properties of the ink film (see Table 5)

(2) prismatic ink

prismatic ink uses holographic fine powder finely cut from polyester as pigment. With its holographic characteristics, it achieves prismatic effect, and can obtain diamond like brilliance similar to that of metal pigments in the past

good chromogenic effect can be obtained by mixing this powder in the ink and printing it on the black background, or printing it on the back of the transparent film and smearing it. There are three types of fine powders

#256:103 μ m × one hundred μ m. Below 150 mesh

375:50 μ m × one hundred μ m. Under 180 mesh

500:50 μ m × fifty μ m. Of course, products with large specifications have high prismatic effect and look brighter. Various specifications are available in silver, gold, copper and tin. Silver has a blue and white feeling, and looks the brightest; Gold has almost the same brightness as silver; Copper is a reddish color, and its brightness is slightly lower than gold; Tin is a grayish color with slightly lower brightness

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