Container coatings Viscosity performance testing

Viscosity is a measure of the resistance encountered by a part of the liquid when it moves on another part of the liquid. It is a characteristic that hinders its relative flow inside the liquid. Viscosity is a technical index of coating products. It can control the molecular weight of the main substance in the coating resin; the viscosity is also an important process parameter in the coating construction. In the brush method, roller method and airless spraying, the coating thickness can be controlled by adjusting the viscosity, and it can be controlled to a certain extent. Improve the appearance quality of the book coating. The unit of viscosity is pumping seconds (Pa s), that is, dynamic viscosity. (Related instrument: viscometer)

In the container coating industry, paint suppliers generally do not provide the supply viscosity index of container paint, and only a few paint suppliers provide guiding construction viscosity index in the paint manual. Removal viscosity Iwata cup IwATA test viscosity index. Expressed in seconds (s). Most paint suppliers only provide the allowable dilution rate of the supporting paint for the container. In order to control the film thickness and paint consumption, some container factories use Tu-4 cup or IWATA cup to test the service viscosity of the supporting paint for each container (indicated by s) , for relative comparison, if the release rate specified by the technology is applied, and the viscosity is not found to be abnormal, this can be used to further affirm the product quality of the paint factory.