Polyester Polyol is a type of polyol that is derived from the reaction between a polyol (such as glycerol or ethylene glycol) and a dicarboxylic acid (such as adipic acid or phthalic anhydride). It is commonly used as a raw material in the production of polyurethane foams, coatings, adhesives, and elastomers.
Polyester polyols are typically liquid at room temperature and have a high molecular weight. They can be further reacted with isocyanates to form polyurethane materials, which have a wide range of applications in various industries, including automotive, construction, and furniture.
PU resin, also known as polyurethane resin, is widely used in the production of synthetic leather. Synthetic leather, also referred to as faux leather or artificial leather, is a man-made fabric that imitates the appearance and feel of genuine leather. PU resin is a key component in the manufacturing process of synthetic leather, as it provides the material with its durability, flexibility, and water resistance.
The process of producing synthetic leather involves coating a fabric substrate, such as polyester or nylon, with a layer of PU resin. This resin is typically applied in liquid form and then undergoes a curing process to solidify and bond with the fabric. The resulting material has a leather-like texture and appearance.
PU resin offers several advantages for synthetic leather production. It has excellent abrasion resistance, making the synthetic leather more durable and long-lasting. It also provides flexibility, allowing the material to be easily shaped and molded into different forms. Additionally, PU resin offers good water resistance, preventing the synthetic leather from absorbing moisture and becoming damaged.
Moreover, PU resin can be customized to achieve different finishes and textures, such as smooth, grainy, or embossed patterns, depending on the desired aesthetic. It can also be colored in various shades to mimic different types of leather. This versatility makes PU resin a popular choice for synthetic leather manufacturers.
Overall, PU resin plays a crucial role in the production of synthetic leather, providing the material with its desirable qualities of durability, flexibility, and water resistance.
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“China is facing tremendous pressure for carbon emission reduction, and the petrochemical industry has a lot to offer.†Jin Yong, academician of the Chinese Academy of Engineering and Dean of the Institute of Chemical Science and Technology of Tsinghua University, places high hopes on the role of the petrochemical industry in carbon reduction.
In the low-carbon economy, the petrochemical industry has a lot to offer. First of all, the petrochemical industry itself is a large consumer of energy, energy and carbon emissions, and the structural contradictions of the industry are relatively prominent. It is urgent to adjust the structure and industrial layout as soon as possible, eliminate a large number of backward production capacity and excess production capacity, and save energy and reduce carbon consumption. Great. Secondly, the petrochemical enterprises’ awareness of energy conservation and environmental protection has been increasing in recent years. Wastewater and residual pressure utilization, comprehensive utilization of “three wastesâ€, dry coke quenching, polyvinyl chloride and other energy-saving and environment-friendly new technologies and new technologies emerge in endlessly. Make the industry's energy consumption indicators significantly lower. Third, the petrochemical industry is a pillar industry of the national economy. Its products are widely used in various fields such as industry, agriculture, national defense, and people's lives. The technological advancement or upgrading of the industry can not only promote the reduction of the energy consumption level of the industry itself and the reduction of carbon emissions, but also drive and promote the progress of energy conservation and emission reduction in relevant industries and fields.
The advent of a low-carbon economy poses challenges and opportunities for the petrochemical industry. “As the saying goes, the solution of the bell must be a bell person. The petrochemical industry should be a practitioner of low-carbon economy. Green chemicals and circular economy also require the development of the petrochemical industry to solve the problem of energy conservation and emission reduction in the petrochemical sector, and even other industries. The energy conservation and emission reduction problem.†Wang Wu, executive deputy director of the China Chemical Industry Standardization Institute and secretary-general of the National Chemical Energy Conservation and Emission Reduction Center, said: “For example, greenhouse gas CO2 can be physically used and chemically fixed, etc. At least 40 million tons.At present, the global carbon dioxide emissions are 28 billion tons/year, and the recycling of various carbon dioxide resources is about 250 million tons, which is less than 1% of the emissions. Therefore, the capture and storage technology of carbon dioxide is particularly important, regardless of physics. Both the law and the chemical method are inseparable from the technical support of the petrochemical industry. Therefore, the petroleum and chemical industries must have great potential for a low-carbon economy."
At present, many breakthroughs have been made in the petrochemical industry in China, including dry acetylene technology, large-scale closed-type calcium carbide furnaces, hollow electrode and furnace gas comprehensive utilization technologies, yellow phosphorus electro-de- dusting technology and exhaust gas comprehensive utilization technology, and chromium salts without calcium. Roasting technology, zero discharge technology of nitrogen fertilizer production sewage and nitrogen fertilizer energy saving technology, etc. These breakthroughs have provided a good foundation for the final energy-saving and emission reduction of China's petrochemical industry.
In fact, with the development of technology and the improvement of processes, we have made more contributions to control of greenhouse gas emissions and China's chemical industry has potential. For example, some new chemical processes using carbon dioxide as raw materials are currently accelerating their development. Carbon dioxide produced by devices such as synthetic ammonia can produce urea, salicylic acid, methanol, and clean fuels. At the same time, many chemical companies are developing new technologies and systems for reducing CO2 emissions and storing CO2.
Li Yongwu, president of the China Petroleum and Chemical Industry Association, said that the power to push companies to achieve technological innovation comes from many aspects. For example, in the coal chemical industry, the decline in oil prices means that the relative price advantage of coal prices relative to the reduction in the cost of oil, which will encourage coal chemical industry The company conducts further technological innovations to reduce costs. On the other hand, coal chemical products represented by methanol and dimethyl ether are always in a state of overcapacity in the near future. How companies can upgrade the technological level of downstream industries, such as alternative energy applications, will also determine the excess capacity of products such as methanol. The level of corporate competitiveness.
Polyester polyols have several advantages over other types of polyols. They have good chemical resistance, mechanical properties, and thermal stability. They also have low toxicity and are environmentally friendly. Additionally, polyester polyols can be easily modified to achieve desired properties, such as increased flexibility or flame retardancy.
Co-existence of Challenges and Opportunities for Carbon Emission Reduction in the Domestic Petroleum and Chemical Industry
Among the 1,000 key energy-consuming enterprises announced by the National Development and Reform Commission, there are 340 oil and chemical companies, accounting for 1/3 of the total; and 482 oil and chemical companies are among the state's key monitoring companies for pollution emission from waste gas and waste water. And 803, accounting for 13.4% and 25.8%. The importance of carbon reduction in the oil and chemical industry is evident here.