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[Chemical Knowledge]：Manufacturing method and process of TPU

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Thermoplastic polyurethane elastomer (TPU) is a widely used chemical raw material. Because of its excellent performance, such as wear resistance, tear resistance, oil resistance, chemical resistance, etc., it is widely used in footwear, wire and cable, automobile, construction and other fields. This article will introduce the manufacturing method of TPU in detail.

1. Raw Material Preparation

The manufacture of TPU requires the preparation of raw materials such as polyols, diisocyanates, and chain extenders. Among them, polyol and diisocyanate are the main raw materials of TPU, and the chain extender can adjust the hardness and elasticity of TPU.

2. prepolymer synthesis

prepolymer synthesis is a key step in TPU manufacturing, mainly through the reaction of polyols and diisocyanates to generate prepolymers. This process needs to be carried out at a certain temperature and pressure, and at the same time, the reaction speed and the proportion of raw materials need to be controlled to ensure the quality and performance of the prepolymer.

3. chain extension reaction

After the prepolymer is synthesized, a chain extender needs to be added for chain extension reaction to generate TPU with high molecular weight. The chain extension reaction needs to be carried out at a certain temperature and pressure, and the reaction time and the amount of chain extender need to be controlled to ensure the molecular weight and performance of the TPU.

4. Mixing and Granulation
After the
chain extension reaction is completed, the resulting TPU needs to be mixed and granulated to facilitate subsequent processing and use. The mixing and granulation process requires attention to control the temperature and shear force to ensure the quality and performance of the TPU particles.

5. post-treatment

The finished TPU granules need to be post-treated, including drying, sieving, packaging and other steps to ensure product quality and storage stability.

In short, the manufacturing process of TPU needs to strictly control the process parameters and raw material quality of each step to ensure the quality and performance of the final product. At the same time, due to the wide range of applications of TPU, different application areas have different performance requirements for TPU, so it is necessary to optimize the formulation and process according to specific application requirements.

6. Quality Control and Testing

In order to ensure the quality and performance of TPU products, strict quality control and testing are required during the manufacturing process. This includes quality testing of raw materials, parameter monitoring in the production process, and performance testing of finished products. Through the quality control of each link, we can ensure that the quality and performance of the final product meet the predetermined requirements.

7. environmental protection and safe production

In the TPU manufacturing process, we also need to pay attention to environmental protection and safe production. This includes reducing waste emissions in the production process, reducing energy consumption, and improving production efficiency. At the same time, it is also necessary to strictly abide by the relevant safety regulations to ensure the safety of employees and equipment.

8. R & D and innovation

With the continuous progress of science and technology and the changing application needs, TPU manufacturing technology and products are also constantly developing. Therefore, companies need to pay attention to R & D and innovation, by introducing new technology and equipment, optimizing production processes, and improving product quality and performance to meet changing market needs.

In short, the manufacturing process of TPU is a complex and sophisticated process that requires companies to have a wealth of technical accumulation and production experience, as well as to keep up with market changes and technological advances to maintain competitiveness and sustainable development.

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