In previous articles, we have introduced polyurethane-edged rock wool board, its construction methods, installation steps, and whether it can be used for exterior walls. Today, let's discuss why polyurethane-edged rock wool composite board is highly sought after in the market.
Polyurethane rigid foam exhibits excellent fire resistance and temperature tolerance properties.
Although polyurethane rigid foam is a polymer, it is a thermosetting material that exhibits inertness during combustion, preventing the formation of molten, flammable droplets. Instead, it forms a charred protective layer, effectively suppressing the risk of fire spread caused by melting. Additionally, polyurethane rigid foam can withstand flying sparks and radiant heat, and it can prevent oxygen from entering the boards or the interior of the wall insulation, where it might come into contact with the foam plastic core material, thus avoiding direct combustion of the core. This ensures the integrity of the building. Moreover, by adjusting the formula, polyurethane rigid foam materials can fully meet the higher fire-resistant requirements of building insulation materials.
Polystyrene foam is a thermoplastic material that, upon a fire, first softens and deforms, then melts and shrinks with combustion, potentially causing hot liquid drips or flows. Once ignited to a certain extent, the entire thermal insulation system will collapse.
2. Polyurethane rigid foam exhibits excellent self-adhesive properties with wall base materials.
Polyurethane rigid foam materials can be securely bonded with various materials such as bricks, blocks, and stones, with their bonding strength exceeding their tensile strength, offering excellent wind resistance. As an exterior insulation system material, it is suitable for multiple construction methods. During installation, its excellent self-adhesive properties can be fully utilized, allowing the polyurethane rigid foam exterior insulation cladding system to better bond with the exterior wall, thereby saving materials and labor costs.
3. Excellent mechanical and processing properties of polyurethane rigid foam
Polyurethane rigid foam boasts excellent physical and mechanical properties. It is lightweight, with high compressive and shear strengths. It is a hydrophobic material with a closed cell rate exceeding 90%, offering superior moisture and water resistance, as well as noise and vibration reduction. Polyurethane rigid foam offers diverse processing options, allowing for on-site spraying, casting, or pre-fabricated panels, depending on the application. Additionally, it exhibits superior acoustic and electrical properties, resistance to mild acids and alkalis, and is non-toxic, non-irritating, and non-biologically parasitic.
4. Polyurethane rigid foam offers a relatively low cost.
As a durable consumer product, a building should be considered from a comprehensive and long-term practical system perspective when it comes to the costs of applying an exterior wall insulation system. The price of insulation materials is only a part of the overall system cost; other factors to consider include the number of construction processes, the difficulty of the construction work, the consumption of construction materials, the durability of the project, safety, and the comfort of the living environment. However, from the analysis of the above performance, the comprehensive cost price of applying a polyurethane rigid foam insulation system is very reasonable.
