Polyurethane rigid foam with thermal insulation effect is widely used in refrigerators and freezers, but there are many problems encountered in the foaming process, and the following is the analysis of some common problems
Carbon dioxide is produced in large quantities as a by-product of many industrial processes, resulting in a sustained increase in atmospheric carbon dioxide concentrations above 420 ppm. This increase has raised serious concerns about climate change and prompted global efforts to mitigate its impacts.
The yellowing of polyurethane sponge has always been a problem that plagues sponge manufacturers and polyol manufacturers. Many sponge manufacturers, especially some high-end sponge manufacturers, have tried to improve the anti-yellowing performance of sponge by adding antioxidants and light stabilizers, but the results are not significant. In this article, we will analyze the causes of yellowing of sponge systematically based on the upstream and downstream characteristics of polyol and sponge production, and elaborate the corresponding solutions.
Flexible polyurethane foam is a polymer produced from the reaction of polyols and isocyanates. It is characterized by a cellular structure with low density, good elastic recovery, sound absorption, air permeability, heat preservation and other properties.
Polyurethane flexible foam has always been the preferred material for car seats due to its durability and comfort, and the material has even greater potential: it can also help car manufacturers reduce CO2 emissions and the use of fossil resources in the production of car seat cushions significantly.
With the expansion of factory and the continuous improvement of production capacity, QICHEN company has increased its investment in R&D, introduced new equipments and a group of outstanding technical personnel, strengthened the R&D team, and committed to providing customers with better products, better technical support, more competitive prices, more convenient and efficient services~
Polyurethane spraying is a new type of synthetic material with the integration of thermal insulation and waterproof functions. Because of its low thermal conductivity, light weight, good heat resistance, efficient insulation, good sealing, easy to bond with concrete, wall, wood and other substrates, no cracking, no shedding, no corrosion, etc. For various shapes of substrates, whether it is a plane, elevation or top surface, whether it is a round, spherical or other irregular shape of complex objects, can be sprayed foaming processing directly. Therefore, it is often used in cold storage, exterior walls, walls, building insulation, equipment and pipeline insulation, storage tank insulation, breeding farms, steel structure workshops, light steel villas and other projects of thermal insulation and spraying construction.
Cast polyurethane (CPU) is the most widely used and most produced polyurethane elastomer. It is a process in which oligomeric polyols, isocyanates, and chain extenders (crosslinkers) are used as raw materials, react polyols with isocyanates to form low-molecular weight prepolymers at specific temperatures, and then add chain extenders to form cast polyurethane. Because of its superior comprehensive performance, a wide range of hardness, high strength and elongation, excellent wear resistance,etc, it is becoming more and more popular.
Sustainability is one of the recent development themes in the polyurethane industry, and electric vehicle industry is bringing the new application requirements for polyurethane. This reflects the strong interest in sustainable products in the electric vehicle industry and will be a significant opportunity for the polyurethane industry.
Recently, the National Development and Reform Commission, the Ministry of Housing and Urban-Rural Development proposed the "Work Program for Accelerating Energy Conservation and Carbon Reduction in the Construction Sector" to improve the energy efficiency continuously, reduce carbon emissions and accelerate the improvement of the quality of green and low-carbon development in the construction sector.
