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Waterproofing and moisture resistance are becoming key focuses in the development of perlite insulation materials. Dacheng Xiangdong Insulation Refractory Material Factory – Contact: 13473696600, 15731614448
As the demand for high-performance insulation grows, attention to water absorption and waterproofing is increasingly important. The water absorption rate of an insulation material plays a critical role in its overall effectiveness. Water has a thermal conductivity that is 23.1 times higher than air at room temperature. When perlite insulation absorbs water, it significantly reduces its insulating performance and can also lead to metal corrosion, which is highly damaging.
The internal structure of insulation materials typically includes three types of pores: open, closed, and semi-closed. While organic foam plastics may have some closed-cell structures, most inorganic insulation materials are prone to water absorption regardless of their pore type. Open pores allow water to penetrate through capillaries, leading to high overall water absorption rates.
Currently, most thermal insulation materials in China lack water-repellent properties, resulting in high water absorption. This makes the outer protective layer more critical, increasing both the complexity and cost of the system. To address this issue, silicone-based water repellents have emerged as a highly effective solution.
The hydrophobic mechanism of perlite insulation boards involves using organosilicon compounds that chemically bond with inorganic silicate materials. This bonding alters the surface properties of the material, making it water-resistant. This method offers excellent stability, low cost, and a simple application process, making it a preferred choice for modern insulation systems.
By improving the waterproof performance of perlite, manufacturers can enhance the durability and efficiency of insulation products, meeting the growing demands of the construction industry.