EPS molded polystyrene insulation board is widely used in the field of building insulation. There is a close relationship between its compressive strength and density, and in practical applications it is necessary to achieve a balance of multiple aspects of performance.
First of all, the density of EPS molded polystyrene insulation board has a decisive impact on its compressive strength. Generally speaking, as the density increases, the compressive strength of EPS molded polystyrene insulation board will increase significantly. This is because higher density means more polystyrene particles per unit volume, and the connections between particles are tighter and better able to withstand external pressure. For example, the compressive strength of an EPS molded polystyrene insulation board with a density of 15kg/m³ may only reach about 60kPa, but when the density is increased to 30kg/m³, the compressive strength can exceed 200kPa. However, the increase in density is not without limitations. Excessive density will cause the insulation board to increase in weight and cost, and its insulation performance may be weakened to a certain extent.
Secondly, when pursuing the balance between compressive strength and density, practical application scenarios need to be considered. For some non-load-bearing wall insulation projects with low load-bearing requirements, such as the internal insulation of ordinary residential exterior walls, EPS molded polystyrene insulation boards with relatively low density can be used to meet the basic compression requirements while giving full play to their good properties. Excellent thermal insulation performance, reducing building energy consumption. For roof insulation or parts that may bear certain loads, such as basement roof insulation, the density of the insulation board needs to be appropriately increased to ensure sufficient compressive strength and prevent deformation or even damage due to pressure during long-term use.
Furthermore, in addition to compressive strength and density, other properties also need to be taken into consideration. For example, when increasing density to enhance compressive strength, attention should be paid to the dimensional stability of insulation boards. If density changes lead to uneven internal structure, in an environment with large changes in temperature and humidity, the insulation board may shrink, expand and other deformations, affecting the insulation effect and overall appearance. In addition, its air permeability, moisture absorption and other properties should also be considered to avoid other performance problems caused by excessive emphasis on compressive strength and density, such as the decrease in thermal insulation performance of the insulation board and the growth of mold after the insulation board gets damp.
Finally, a better performance balance can be achieved by optimizing the production process. Using advanced foaming technology and molding process, the internal structure of polystyrene can be improved while controlling the density, making the particles more evenly distributed, thereby improving the compressive strength. For example, precise control of the amount of foaming agent, foaming temperature, time and other parameters, as well as the use of appropriate pressure and mold design during the molding process, will help produce EPS with reasonable density and compressive strength matching and excellent comprehensive performance. Molded polystyrene insulation board meets the construction market's demand for various performance aspects of insulation materials and promotes the development of building energy conservation.
