First, UV ink technology was first developed by the United States, and it has only been used in printing for nearly a decade in China. Such as offset printing, printing, letterpress and so on. In India, it has not yet been popularized and is in use. It is the trend of future development.
Second, UV ink advantages and economic benefits, social benefits
1, environmental protection, non-toxic. UV inks are solvent inks, do not emit any pollutants, reduce air pollution, and improve the working conditions of operators.
2, energy saving. In sheet metal printing, the drying of the ink consumes a large amount of heat energy (coal consumption, fuel consumption, and power consumption), whereas the UV-curable ink does not require heating, instant curing can be completed, and energy is saved.
3, save plant. In the traditional metal printing, the oven needs to be 30-40m long and 5m high, while the UV curing device needs only 5m long and 2m high, and the power consumption is only 36kw, which saves space, improves production efficiency, and improves production management. condition.
4, fixed fast. The printed iron sheet can be cured instantaneously, omitting the drying process of the barbecue, adapting to continuous overprinting, and increasing the production capacity.
5, improve product quality. In the iron printing process, mechanical printing can be eradicated due to the fact that the curing process of printing does not involve iron frames. In addition, no heat baking, reducing the degree of discoloration of the ink (high temperature discoloration), adsorption of dust and so on.
Third, the principle of UV ink drying
The use of ultraviolet light causes the photoactive material molecules to decompose to form a highly activated atom or a highly activated atomic group. These highly activated atoms and atomic groups induce a series of photoinitiated chain reactions to the organic compounds containing unsaturated bonds, and finally reach the molecular crosslinked polymerization curing and drying. purpose.
UV ink drying is a photochemical process. The speed of light is 3×10 km/s. The chemical bonding time is only a few hundredths of a second. The printing speed of 5000 sheets/hour does not affect the curing fastness.
The photochemical reaction and the thermal reaction are different. The activation energy of the thermal reaction originates from the molecular collision, which is relatively long, and the activation energy of the photochemical reaction originates from the light energy.
four. UV ink composition:
The imported photocurable resin is added with a photoinitiator, a photosensitizer, a surfactant, a pigment, and a monomer.
5. The production process of UV printing ink is the same as the traditional printing ink production process.
UV printing ink usage:
1. Incorporation of ink. Photo-solid inks can be blended with one another, but they must not be blended with ordinary inks. When changing from the original ink to light solid ink, it should be washed before printing.
2, wash the ink. Washing solvent application Special light-curable ink products. In the middle of the printing, if the cleaning solvent remains on the ink roller, the blanket, and the water roller, it will be a cause of the poor drying of the ink and poor ink, so it must be completely removed.
3. The printing machine rubber roller needs UV special purpose or dual purpose rubber roller. When the short printing, the PS printing plate is directly on the machine. If the printing plate is about 3000 or more, the PS printing plate can be dried by the traditional drying room 160 degrees - 180 degrees. Bake version. Make it more print-resistant.
Second, UV ink advantages and economic benefits, social benefits
1, environmental protection, non-toxic. UV inks are solvent inks, do not emit any pollutants, reduce air pollution, and improve the working conditions of operators.
2, energy saving. In sheet metal printing, the drying of the ink consumes a large amount of heat energy (coal consumption, fuel consumption, and power consumption), whereas the UV-curable ink does not require heating, instant curing can be completed, and energy is saved.
3, save plant. In the traditional metal printing, the oven needs to be 30-40m long and 5m high, while the UV curing device needs only 5m long and 2m high, and the power consumption is only 36kw, which saves space, improves production efficiency, and improves production management. condition.
4, fixed fast. The printed iron sheet can be cured instantaneously, omitting the drying process of the barbecue, adapting to continuous overprinting, and increasing the production capacity.
5, improve product quality. In the iron printing process, mechanical printing can be eradicated due to the fact that the curing process of printing does not involve iron frames. In addition, no heat baking, reducing the degree of discoloration of the ink (high temperature discoloration), adsorption of dust and so on.
Third, the principle of UV ink drying
The use of ultraviolet light causes the photoactive material molecules to decompose to form a highly activated atom or a highly activated atomic group. These highly activated atoms and atomic groups induce a series of photoinitiated chain reactions to the organic compounds containing unsaturated bonds, and finally reach the molecular crosslinked polymerization curing and drying. purpose.
UV ink drying is a photochemical process. The speed of light is 3×10 km/s. The chemical bonding time is only a few hundredths of a second. The printing speed of 5000 sheets/hour does not affect the curing fastness.
The photochemical reaction and the thermal reaction are different. The activation energy of the thermal reaction originates from the molecular collision, which is relatively long, and the activation energy of the photochemical reaction originates from the light energy.
four. UV ink composition:
The imported photocurable resin is added with a photoinitiator, a photosensitizer, a surfactant, a pigment, and a monomer.
5. The production process of UV printing ink is the same as the traditional printing ink production process.
UV printing ink usage:
1. Incorporation of ink. Photo-solid inks can be blended with one another, but they must not be blended with ordinary inks. When changing from the original ink to light solid ink, it should be washed before printing.
2, wash the ink. Washing solvent application Special light-curable ink products. In the middle of the printing, if the cleaning solvent remains on the ink roller, the blanket, and the water roller, it will be a cause of the poor drying of the ink and poor ink, so it must be completely removed.
3. The printing machine rubber roller needs UV special purpose or dual purpose rubber roller. When the short printing, the PS printing plate is directly on the machine. If the printing plate is about 3000 or more, the PS printing plate can be dried by the traditional drying room 160 degrees - 180 degrees. Bake version. Make it more print-resistant.
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