Latest company case about Shenzhen Hanast New Material co.,LTD Certifications

Cultured stone is now widely used in homes, offices, and storefront renovations. These cultured stones are directly molded using silicone molds. Many new customers may find their products less than ideal. Let's analyze the reasons for these problems.

1. Filler moisture content exceeds normal levels. When the moisture content of the filler particles is high, tiny water bubbles form around them. Since resin curing is an exothermic process, the released heat disrupts the balance of these water bubbles, leaving them trapped within the artificial stone matrix. This results in air bubbles on the surface after curing.
2. Air enters the silicone mold during the mixing process.
3. Improper ratio of resin, curing agent, and initiator prevents air bubbles remaining in the matrix from being expelled in time.

1. Vibration Defoaming Method: When using this method, attention should be paid to the amplitude, frequency, and vibration time of the platform. Excessive amplitude will cause filler to deposit on the surface of the mold, resulting in one side being resin-deficient, curing slowly, shrinking little, and having a low exothermic temperature, while the other side, due to high resin content, cures quickly, shrinks slowly, and has a high exothermic temperature, making it prone to warping.
2. Vacuum Method: Using negative pressure during stirring to keep the artificial stone matrix boiling facilitates chemical reactions and easily removes air bubbles generated during stirring.

If you encounter the above problems, please contact HANAST Silicone. We not only provide mold silicone raw materials but also offer practical technical solutions.