Methods For Eliminating Bubbles And Rough Surfaces On Artificial Stone Surfaces

There are usually three methods for exclusion:
1. Vibration defoaming method. The use of this method should pay attention to the amplitude, frequency, and vibration time of the platform. If the amplitude is too large, it will cause the filler to deposit on the surface of the template, resulting in poor resin on one side, slow curing, small shrinkage, and low heat release temperature; On the other hand, due to its rich resin content, it solidifies quickly, shrinks slowly, releases heat at high temperatures, and is prone to warping.
2. Chemical defoaming method. The use of anti foaming agents (commonly known as defoamers) that have a blocking effect on resin cross-linking and curing can prevent resin polymerization for a certain period of time, and after a period of time, the resin can polymerize at a normal rate, buying time for the effective discharge of bubbles. The use of this method has little effect on the heat release caused by resin curing. If the dosage of initiators and accelerators is reduced, although it can also delay the polymerization of the resin, it will affect the quality of artificial stone due to the deformation of the resin heating curve.
3. Mixing and vacuuming method. Using negative pressure stirring to keep the artificial stone boiling is beneficial for chemical reactions and easy removal of bubbles generated during the stirring process.
The above three methods, especially the combination of the first and third methods, are more practical, reliable, and have the effect of long-term investment. The second method, although simple, is too costly for large-scale production.