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.

The main factors affecting the performance of polyurethane foams

In the actual production process of polyurethane flexible foam, there are often various quality problems in the products, and there are many causes for these problems. Sometimes, the problem cannot be solved well after multiple investigations, but few people notice that it may be due to the high acidity of TDI.

Polyurethane sandwich panels, with their superior properties, have found widespread applications across multiple areas. 

As a well-performance building material, polyurethane sandwich panel has many advantages.

Polyurethane sandwich panel is a kind of high-performance building material primarily composed of three layers: two layers of high-strength metal sheets (such as color-coated steel plates, aluminum plates, etc.) serving as the face sheets, and a core material filled with rigid polyurethane foam. The polyurethane foam is injected between the two metal sheets through high-pressure foaming technology, forming a sturdy sandwich structure with exceptional insulation and thermal barrier properties.