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How to make the ink viscosity reach the ideal state in high-speed rotary gravure printing?
- Jul 31, 2018 -

In plastic gravure printing, how to control the ink printing viscosity is a very critical issue. Especially in high-speed rotogravure printing, whether the ink printing viscosity control is appropriate is directly related to most of the quality problems such as pigment transfer, dirty plate, print gloss brightness, pigment adhesion fastness, static electricity, etc. Product yield and work efficiency.

Factors affecting ink viscosity

The factors affecting the viscosity include the diameter of the elastic roller, the hardness and the modulus of elasticity, the properties of the roller, the rotational speed of the roller, the temperature of the roller, the temperature and humidity of the environment, the temperature of the sample, the thickness of the ink film, the influence of the ink or the binder on the elastic roller. , the condition of the elastic roller during the cleaning process, the nature of the sample to be tested, and the like.

The factors affecting viscosity are that the viscosity is closely related to its temperature, the concentration of the component particles, the particle size, etc., and the relationship between humidity and pressure is not large. The measurement accuracy and unit of measurement of different measurement methods are different and cannot be converted to each other.

From the above four points, we can see that there is a big difference in ink printing viscosity and viscosity, but there is still a connection between the two. The main performance is that the viscosity is the physical quantity that measures the viscosity of the fluid. The dynamic viscosity of the fluid is determined by the inherent physical properties of the fluid. The value is a direct measure of the viscosity of the fluid. It is also the resistance of the fluid to shear deformation during motion. A measure of strength. Under the same environmental conditions, a large viscosity means that the viscosity is large, and vice versa.