Tpu is a kind of thermoplastic polyurethane elastomer, also known as thermoplastic polyurethane rubber. It is an elastomer that can be plasticized by heating and dissolved by solvent. It has excellent comprehensive properties such as high strength, high toughness, wear resistance, oil resistance and good processability, and is widely used in national defense, medical care, food and other industries. In the molten state or solution state, the intermolecular force is weakened, but after cooling or solvent evaporation, there is a strong intermolecular force to connect together and restore the original solid properties.

Thermoplastic polyurethane elastomer has become one of the important thermoplastic elastomer materials because of its excellent performance and wide application, and its molecules are basically linear with little or no chemical crosslinking.

Classification of tpu

Polyurethane thermoplastic elastomer has two types: polyester type and polyether type, with white irregular spherical or columnar particles, and the density is1.10 ~1.25g/cm3. The relative density of polyether type is less than that of polyester type. The glass transition temperature of polyether type is100.6 ~106.1℃, and that of polyester type is 108.9~ 122.8℃. The brittleness temperature of polyether and polyester is lower than -62℃, and the low temperature resistance of polyether is better than that of polyester.