| Overview of TPU Definition: TPU (Thermoplastic polyurethanes) is a thermoplastic polyurethane elastomer, a polymer material that falls between rubber and plastic. Invention: First developed by Bayer AG in Germany in 1958. Properties: TPU possesses the high elasticity of rubber and the high strength of engineering plastics, characterized by high toughness, high elasticity, high modulus, and excellent comprehensive performance such as chemical resistance, wear resistance, oil resistance, and strong shock absorption. Application Fields: Widely used in shoe materials, cables, films, pipe materials, automotive, medical, and other industries. TPU Market Demand Shoe Materials: The largest market demand, accounting for about 30% of the total TPU market demand. Machinery Industry: Accounts for about 28%. Pipe Materials, Automotive, Construction: Each accounts for about 10%. Application of TPU in Car Clothing Advantages of Aliphatic Polycaprolactone TPU Yellowing and Hydrolysis Issues: Common problems with inferior TPU car clothing, affecting the interests of dealers and consumers. Causes of Yellowing: PVC film is used to imitate TPU film. Use of aromatic TPU with weak resistance to yellowing. Aromatic TPU has a methylene bridge that is prone to oxidation, leading to yellowing. Advantages of Aliphatic TPU: Does not contain benzene rings, making the structure more stable and less susceptible to ultraviolet light. The choice of mainstream international brand car clothing. Higher cost, leading to price differences. Hydrolysis Issue in Car Clothing Polyester TPU: Prone to hydrolysis, leading to degradation and easy breakage. Polyether TPU: Not prone to hydrolysis, but susceptible to thermo-oxidative degradation. Polycaprolactone TPU: Good heat resistance and hydrolysis resistance. Selection Recommendations Aliphatic TPU: Although more expensive, it offers superior performance, making it the preferred material for car clothing. Synthesis Process: It is necessary to control low molecular weight impurities and stabilizers to avoid yellowing. Selection of Film Type: Incorrect selection may lead to film cracking
When selecting TPU for car clothing, aliphatic polycaprolactone TPU should be given priority due to its excellent resistance to yellowing and hydrolysis, despite its higher cost. At the same time, control over the material during the production process and the correct choice of film type are also crucial to ensure the quality and performance of the final product.
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