Polyurethane rigid foam is a kind of foam plastic formed through a rapid chemical reaction between blended polyol and isocyanate mixed in a specific proportion. How to control the quality of rigid PU foam ? Let’s take a look from three aspects.
Water-based foaming materials play an important role in improving the performance of the whole vehicle such as heat preservation, vibration reduction, environmental protection, sealing, anti-corrosion, and fuel saving, and will have epoch-making significance for the improvement of the technical level of the entire Chinese bus industry.
With the polyurethane high resilience foam process, the foaming technology is becoming more and more perfect, and more and more people pay attention to the reboundrate of foam.
In mine and tunnel operations, a wide variety of problems are often encountered, with water leakage being the most common. With the R&D and development of polymer materials, polyurethane two-component organic water-blocking materials have attracted more and more attention.
Rigid polyurethane (PU) insulation is a polymer made by reacting isocyanates with polyols. Due to its good thermal insulation performance and excellent waterproof performance, it is widely used in external wall insulation, roof insulation, and thermal insulation of special parts such as cold storage, grain depot, archives, pipelines, doors and windows.
Polyurethane flexible foam has gained widespread application for its exceptional rebound performance, whether in furniture cushioning, car seats, or sports equipment. So, what factors influence its rebound performance? Let's have a look.
The formation of polyurethane foam is a chemical reaction process, which is controlled by the polymerization reaction and the foaming reaction, and temperature is a very important environmental factor affecting the chemical reaction rate. Therefore, only within a defined temperature range can a reasonable catalyst amount be determined, a suitable formulation and the corresponding process parameters can be determined.
Foams made of polyurethane materials have superior insulation, thermal insulation and sound insulation properties. Polyurethane foam is a best-selling product widely used in production and life. The finished polyurethane foam is a porous solid with very poor thermal conductivity, which can easily cause heat accumulation and cause fires.
With the rapid development of China's economy, the demand for energy is increasing, which promotes the development of many industries such as coal mining and construction. In the process of coal mining, the support and protection of the roadway roof is the premise to ensure the safe and efficient production of coal mines. Chemical grouting is a technology developed in recent years, which can consolidate the broken coal and rock mass in a short time and achieve high strength, effectively improve the stability of the broken coal and rock mass in the mining process, and avoid and reduce the roof and sheet gang accidents caused by the crushing surrounding rock.
The global polyurethane industry is undergoing a seismic shift in 2024. Facing challenges ranging from macroeconomic fluctuations, soaring energy costs and increasing environmental pressures to restructuring market landscape, major players are adopting various strategies to tackle challenges and seek long-term development. This article will provide an in depth analysis on this industry transformation from three aspects: plant closures, M&As and capacity expansions.