Anti-mold and anti-bacterial agent GNCE5700-O-20 is a safe, efficient, broad-spectrum anti-mold agent, suitable for adding to paints and a variety of oily liquid substances, to play anti-mold and anti-bacterial effect, such as paints, coatings, mineral oil, etc.. Crafts, furniture and other products, in the production, storage and transportation process, because of its rich nutrition, its own high moisture and easy to absorb moisture, very easy to moldy situation.
This simple relationship is called a Newtonian liquid, where the viscosity is constant and does not change with the change of shear rate. Examples of this form are various low-molecular liquids and solutions, such as water and the most common solvents and mineral oils.
For Newtonian liquids: ① Shear stress versus shear rate is plotted as a straight line passing through the origin; ② Viscosity has nothing to do with shear rate.
The viscosity of the fluid changes with the change of the shear rate and is called a non-Newtonian liquid. Coatings are usually a complex mixture of solvents, various polymers, surfactants, montan ester wax temperature solid particles (spheres, rods, flakes) and other components. Its rheological curve is more complicated and shows a non-Newtonian form.
Using a solvent to dissolve a resin, you can often see the curve shown in Figure 5-3. As the shear rate increases, the required force does not increase significantly. The resistance of the liquid prevents acceleration and weakens the movement. Typical examples are polymer solutions, dispersions, and emulsions. At this time, the polymer molecules begin to orient and the resistance is reduced. This characteristic is called “pseudoplasticity” or “shear thinning” (which is often referred to as “thixotropy”, which will be explained in later chapters). Misunderstanding), in fact, the viscosity is unstable at this time, it depends on the shear rate, or the viscosity is tested at different shear rates to show the characteristics of this system, or the entire rheological curve is recorded.
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