Factors That Affect Performance of Enamel Slip
During the producing processing of enamel products, it is necessary to ball mill the enamel frit into enamel slip and then perform the next step of enameling operation, so the operation performance of the enamel slip has a great influence on the internal quality and appearance of the product. Experienced enamel material manufacturer often start from the source to reduce the influence of enamel slip on enamel products. In this article, Nolifrit enamel glaze supplier will popularize the factors that affect the operating performance enamel slip.
Fluidity means whether the enamel slip can be evenly coated on the metal body. Typical coating methods such as dipping, electrostatic, spraying, etc. have different requirements for the fluidity of enamel slip. There are many factors that affect the fluidity of enamel slip. In addition to the amount of milling additives added during the ball milling of the enamel slip, the composition of clay, the type of enamel frits and the degree of melting also have a great influence.
Yieldability refers to the ability of enamel slip to resist external forces (such as gravity and vibration during transmission) to stop to flow after coated on the metal body. To ensure the uniformity of enamel slip after enameling, enamel slip must have a certain yieldability. The clay suspension is a non-Newtonian fluid, and enamel slip is a plastic fluid. The characteristic of plastic fluid is that the applied shear force must exceed a certain minimum value (ie, the yield value) before it starts to flow. The yieldability of the enamel slip has a certain relationship with the thixotropic properties and consistency of enamel slip.
Choosing high-quality clay or increasing the amount of clay, choosing the right type of stop flow agent and a reasonable range of stop flow agent dosage can increase the yieldability of enamel slip. Increasing the amount of water added will increase the fluidity of the enamel slip and reduce the yieldability.
The rheology of enamel slip directly affects the surface quality of enamel products. No matter what process is adopted, the process performance of the enamel slip must be optimized, and the rheology and yieldability of the enamel slip must be controlled within a reasonable range.