Why does molded polystyrene foam board have excellent thermal insulation performance?
Publish Time: 2025-06-18
With the growing demand for building energy conservation and environmental protection, molded polystyrene foam (EPS) board used for thermal insulation is widely used in various construction projects due to its excellent thermal insulation performance and environmental protection characteristics. This rigid foam plastic board made of polystyrene resin as the main raw material, heated and mixed and added with foaming agent, has a continuous closed-cell structure and is full of closed bubbles inside, which makes it excellent in low thermal conductivity, waterproof and moisture-proof, light and durable, and has become an indispensable high-quality thermal insulation material in the modern construction industry.
The production process of molded polystyrene foam board combines chemical foaming and physical molding technology. During the production process, polystyrene particles are fully mixed with catalysts under high temperature and high pressure, and are formed into a uniform closed-cell structure through mold shaping. This structure makes each board have good air tightness and low water absorption, effectively preventing the problem of reduced thermal insulation performance caused by water penetration, thereby ensuring its long-term and stable thermal insulation effect.
As an ideal thermal insulation material, molded polystyrene foam has many significant advantages. First, it has an extremely low thermal conductivity, usually between 0.032 and 0.041 W/(m·K), which means that it can effectively reduce heat transfer, improve the thermal insulation performance of building envelopes, and reduce energy consumption for heating in winter and cooling in summer. Secondly, because of its independent closed bubble structure, it has excellent moisture resistance and pressure resistance, and can maintain its original physical properties even in a humid environment, and is not easy to deform or fail.
In addition, molded polystyrene foam is also light and easy to process. Its density is usually between 15 and 30 kg/m³, which not only reduces the load on the building structure, but also facilitates transportation and on-site construction. At the same time, its corrosion resistance and aging resistance make it less likely to have performance degradation during long-term use, greatly extending its service life. Whether in the exterior wall insulation system, roof insulation layer, or the insulation layer of the floor heating system, it can play a good application effect.
From an environmental protection perspective, molded polystyrene foam board is in line with the development trend of green building materials. It does not release harmful gases during production and use, and can be recycled and reused after being discarded, reducing the impact on the environment. With the continuous improvement of the country's energy-saving standards for buildings, this material is increasingly being incorporated into the design of various energy-saving buildings, helping to achieve sustainable development under the "dual carbon" goal.
Molded polystyrene foam board is often used for wall, roof and floor insulation of residential buildings, office buildings, shopping malls and other buildings. For example, in the exterior wall insulation system, it can effectively isolate the impact of external temperature changes on the indoor environment; in the floor heating system, it can effectively prevent heat from losing downward and improve energy utilization. At the same time, due to its good dimensional stability and construction adaptability, it is also widely used in special places such as cold storage and refrigerated trucks that have extremely high insulation requirements.
Molded polystyrene foam board has become an important part of the modern building energy-saving system with its excellent thermal insulation performance, stable physical properties and green environmental protection advantages. In the future, under the general trend of the construction industry towards high efficiency, energy saving and low carbon, this type of material will continue to play an important role and promote the continuous advancement of building insulation technology.
