The input pressure of the powder is closely related to the powder coating equipment. It is relatively easy to use, and at the same time, it can make the entire spraying operation simple and easy to operate. Therefore, in the process of using the coating equipment, it is more dependent on it. powerful. Each type of machine and equipment has relevant standards for use, and this powder coating equipment also has corresponding input pressure requirements for powder.
Powder coatings tend to agglomerate at a specific temperature, which is the thermal softening of coating resins and leveling agents and other materials. Thermosetting powder coatings are low molecular weight organic polymer resins. In terms of physical properties of this type of resin itself, at a lower temperature, a hard and brittle glass state will appear. When the temperature rises, there will be a degree of stone, and the resin will open into a state of elasticity and produce a cohesive force. Below this, the temperature, the resin and the return glass state, the resin glass state and the sticking state change each other, the temperature is called the temperature change of the resin glass.
The powder input pressure of powder coating equipment should not be too large, and it is generally controlled at 0.5-1.5kg/cm2. Too much stress can lead to poor pattern definition or pitting. The electrostatic voltage should not be too high, generally controlled around 60-70Kv. If the voltage is too high, the powder rebound phenomenon occurs on the surface of the workpiece hole. Want to point out that the thickness of the coating is generally controlled at 70-100μm, helping to form unique patterns between dusting and large patterns, thin film patterns that are not obvious, and patterns that are cookie-cutter for small cosmetic defects such as pitting.
