Rubber and plastic sponge board

Technical indicators of rubber - plastic sponge mainly include the following aspects: Thermal conductivity It reflects the heat - transfer ability of the material. A lower value indicates better heat - insulation performance. For example, high - quality rubber - plastic sponge usually has a thermal conductivity of around 0.03 - 0.04 W/(m·K). Density Density affects the physical properties of the material. Generally, the density of rubber - plastic sponge is in the range of 40 - 95 kg/m³. Appropriate density can ensure its good elasticity and strength. Flame retardancy It is an important safety index. It is usually divided into different levels. The better ones can reach the B1 - level flame - retardant standard, which means it has good fire - resistance performance and can effectively prevent the spread of fire. Water absorption rate This index reflects the water - proof performance of the material. The lower the water absorption rate, the better the water - proof and moisture - proof effect. The water absorption rate of good rubber - plastic sponge is usually less than 3%. Compressive strength It shows the ability of the material to withstand pressure. Adequate compressive strength can ensure that it will not be deformed or damaged under a certain load, which is very important for its application in some load - bearing environments.