Jiayu Product Knowledge: TPU

Apr 22, 2021

TPU (Thermoplastic Polyurethane) Thermoplastic TPU elastomer is made of MDI containing NCO functional group and POLYOL, 1.4BG containing OH functional group through extrusion and mixing. Due to its good elasticity, good physical properties, and various mechanical strengths All excellent, therefore, it is widely used in processing methods such as injection, extrusion, calendering, and dissolution into solution resins. It is a plastic material often used by plastic processing industries. Its products cover the range of industrial applications and necessities for people's livelihood.
The main characteristics of TPU: a wide range of hardness: by changing the ratio of each reaction component of TPU, products with different hardness can be obtained, and as the hardness increases, its products still maintain good elasticity and wear resistance. It is resistant to oil, water and mold. Good recyclability. High mechanical strength: TPU products have outstanding bearing capacity, impact resistance and shock absorption performance. Outstanding cold resistance: The glass transition temperature of TPU is relatively low, and it still maintains good elasticity, flexibility and other physical properties at minus 35 degrees. Good processing performance: TPU can be processed by common thermoplastic material processing methods, such as injection molding, extrusion, calendering and so on. At the same time, TPU and certain polymer materials can be processed together to obtain polymer alloys with complementary properties.

Pay attention to the injection molding of TPU plastic materials: the main reasons for the occurrence of various undesirable phenomena in injection molding are the following five points. The first plastic material itself is caused by the difference in nature, and the second molding conditions such as temperature, pressure, shooting speed, etc. It is caused by improper setting, the design or manufacture of the third molding mold is defective, the shape and thickness of the fourth molded product are poorly designed, the fifth injection molding machine is improperly selected, and the capacity is insufficient. In fact, injection molding The reason for the defect is not simple, it is usually caused by a number of the above factors. The judgment of the reason for the defect depends on the experience and technology of the operator. The mold cavity filling process. It is recommended to consult relevant professionals before processing to reduce loss costs.

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