A brief introduction to the rheology of printing pastes

Rheology refers to the flow and deformation properties of a fluid under shear stress. The original printing paste is a polymer colloid solution. Under the action of external force, the original printing paste also has the properties of flow and deformation. During printing, the color paste prepared from the original paste is transferred to the substrate by scraping and pressing, which requires the color paste to have a certain fluidity, otherwise it cannot be printed on the substrate, but after scraping and pressing The color paste at the pattern cannot seep out, but must maintain a certain outline and uniformity, so the rheology of the color paste is very important to the realization of the printing effect. At the same time, due to the different rheological properties of various printing pastes, their printing properties and adaptable occasions are also different. In addition, the printing methods, processes, and dyeing materials are different, so the research on the rheological properties of printing pastes is complicated. However, since the printing effect is closely related to the rheology of the color paste, it has a great influence on the printing quality, so it is necessary to conduct a certain analysis and research on the rheology of the printing color paste.

There are many research contents on the rheology of the colorant, because the rheology of the colorant is affected by many aspects, but the most important factor affecting the rheology of the colorant is the original paste. The viscosity of the original paste changes with the shear stress. Law, that is, the rheological properties of the original paste.