描述

注塑TPU塑料

附着力好，粘度低，抗弯性能好，耐磨性好，光泽度高，耐候性好

注射成型TPU塑料

产品细节

15/1，一般在18/1-24/1范围内。产品后处理：为了达到产品的预期机械性能，必须对注射的TPU产品进行后处理。一般在120℃X（50-20）h的烤箱中，然后在室温下停放数周。然而，为了尽快达到预期的性能，消除产品的内应力，大型产品通常采用后淬火处理。TPU 1的淬火条件。产品硬度<85A，80℃x20h，>85A 100ccx20h。除了传统的TPU三辊和四辊压延工艺外，还有两种更重要的工艺是熔融压延和薄膜层压工艺。TPU的压延过程比注射或挤出成型过程更复杂。为了在熔体的粘度、流动性和熔体强度之间保持良好的平衡，控制压延温度非常重要。压延TPU的典型条件如下。TPU配方：含0.25%硬脂酸，热复合温度150℃，压延辊温度1160℃，2160℃，3165℃，4165℃，辊标准速比，1辊2=1.2:1，3辊4=1.1:1

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Injection Molding TPU Plastic

Excellent adhesion,
Low viscosity,
Good flex resistance,
Excellent abrasion resistance,
High gloss,
Excellent weather resistance.

Injection Molding TPU Plastic

Product Details

Injection molding TPU Plastic

Injection molding is also called hot injection molding. The reciprocating screw injection molding machine for TPU is an ideal injection molding method. Because TPU generates large frictional heat under the action of shearing force, and its thermal conductivity is poor, it is more appropriate to use a medium injection speed and a larger glue inlet. Three-stage screw injection molding is commonly used. Screw length/diameter (L/D) ratio>15/1, generally in the range of 18/1-24/1. Product post-processing: In order to achieve the expected mechanical properties of the product, the injected TPU product must be post-processed. Generally in an oven at 120℃X (50-20)h, and then parked at room temperature for several weeks. However, in order to achieve the expected performance as soon as possible and eliminate the internal stress of the product, post-quenching treatment is commonly used in large products. Quenching conditions of TPU 1. Product hardness <85A, 80℃X 20h,> 85A 100CCx 20h. In addition to the conventional three-roll and four-roll calender calendering process for TPU, there are two more Important processes are melt calendering and film lamination processes. The calendering of TPU is a more complicated process than the injection or extrusion molding process. In order to have a good balance between the viscosity, fluidity and melt strength of the melt, the control of the calendering temperature is very important. Typical conditions for calendering TPU are as follows. TPU formula: containing 0.25% stearic acid, hot compound temperature 150°C, calender roller temperature, roller 1,160°C, roller 2,160°C, roller 3,165°C, roller 4,165°C, roller Standard speed ratio, roller 1 roller 2 = 1.2:1, roller 3: roller 4 = 1.1:1.

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