1. Effect of printing machine exhaust system on drying
Exhaust system if not smooth, the solvent can not be removed in a timely manner. An excessively high concentration of solvent in the oven will hinder further volatilization of the solvent and affect the drying effect of the print. Faced with the high pollution and high emission that the modern printing industry is facing, Wonsan Energy has proposed a solution for printing and drying heat pumps. With this scheme, the cost of drying used by printing presses and laminating machines will be reduced by about 50%. At the same time, in the summer, the workshop will be accompanied by a large amount of cold air to reduce the temperature of the workshop. The printing heat pump unit can realize the simultaneous cooling and heating at the same time when working, that is, recovering the half-heat of the air-conditioning system of the heat pump system while heating, and sending it to the workshop to reduce the ambient temperature of the workshop;
2. Effect of ink on drying
(1) The drying effect of aqueous ink is closely related to the pH of the ink. Under the same conditions, when the pH is too low, the drying speed of the ink is accelerated; when the pH is too high, the ink drying speed is slow, and the back of the printed product is likely to appear dirty.
(2) The volatilization rate of the mixed solvent in the solvent type ink directly determines the drying performance of the ink, and the different components in the mixed solvent have different volatilization rates. By mixing different types and different proportions of solvents, the solvent evaporation speed of the ink can be easily adjusted, thereby improving the drying performance.
3. Effect of printing speed on drying
Different printing speeds have different requirements on the performance of the drying system. In the case of relatively high speed requirements, there are relatively high requirements on the heating distance and the drying efficiency of the drying oven. If the supporting drying system can not fully evaporate the solvent, it is very easy to cause the residual solvent to exceed the standard.
4, the printing plate on the impact of drying
For gravure, the depth of the printing plate has a great influence on the drying speed. For example, the depth is 33μm and the 18μm mesh. In the former printing, the drying time of the ink is more than twice as long as the latter.
5. Influence of environmental conditions
Generally printed in a temperature below 20 °C, the ink naturally drying to weaken. Printing in an environment above 30°C tends to accelerate the natural drying of the ink.
The effect of high air humidity on drying: First, the moisture in the air enters the ink, resulting in the deterioration of the comprehensive volatility of the solvent; second, the presence of large amounts of moisture in the air will inhibit the volatilization of the solvent.
Exhaust system if not smooth, the solvent can not be removed in a timely manner. An excessively high concentration of solvent in the oven will hinder further volatilization of the solvent and affect the drying effect of the print. Faced with the high pollution and high emission that the modern printing industry is facing, Wonsan Energy has proposed a solution for printing and drying heat pumps. With this scheme, the cost of drying used by printing presses and laminating machines will be reduced by about 50%. At the same time, in the summer, the workshop will be accompanied by a large amount of cold air to reduce the temperature of the workshop. The printing heat pump unit can realize the simultaneous cooling and heating at the same time when working, that is, recovering the half-heat of the air-conditioning system of the heat pump system while heating, and sending it to the workshop to reduce the ambient temperature of the workshop;
2. Effect of ink on drying
(1) The drying effect of aqueous ink is closely related to the pH of the ink. Under the same conditions, when the pH is too low, the drying speed of the ink is accelerated; when the pH is too high, the ink drying speed is slow, and the back of the printed product is likely to appear dirty.
(2) The volatilization rate of the mixed solvent in the solvent type ink directly determines the drying performance of the ink, and the different components in the mixed solvent have different volatilization rates. By mixing different types and different proportions of solvents, the solvent evaporation speed of the ink can be easily adjusted, thereby improving the drying performance.
3. Effect of printing speed on drying
Different printing speeds have different requirements on the performance of the drying system. In the case of relatively high speed requirements, there are relatively high requirements on the heating distance and the drying efficiency of the drying oven. If the supporting drying system can not fully evaporate the solvent, it is very easy to cause the residual solvent to exceed the standard.
4, the printing plate on the impact of drying
For gravure, the depth of the printing plate has a great influence on the drying speed. For example, the depth is 33μm and the 18μm mesh. In the former printing, the drying time of the ink is more than twice as long as the latter.
5. Influence of environmental conditions
Generally printed in a temperature below 20 °C, the ink naturally drying to weaken. Printing in an environment above 30°C tends to accelerate the natural drying of the ink.
The effect of high air humidity on drying: First, the moisture in the air enters the ink, resulting in the deterioration of the comprehensive volatility of the solvent; second, the presence of large amounts of moisture in the air will inhibit the volatilization of the solvent.
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