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.
With the development of China's economy and the continuous improvement of people's living standards, the consumption demand for refrigerated food has increased rapidly, so the cold chain construction is heating up rapidly. Refrigerated containers and refrigerated insulated trucks are important storage and transportation tools for cold chain logistics, connecting thousands of households and related to people's lives closely.
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.It possesses excellet waterproofing, thermal insulation and heat preservation capabilities.
Integral skin foam is a type of polyurethane foam that is widely used in the manufacture of automotive parts, gym equipment, and furniture and other industries related to daily life. However, some problems in the production process are becoming more and more concerned by producers.
