What is the temperature difference between TPE encapsulation and conventional injection-molded TPE?
Source：德创化工Time：2021-10-09Hits：1611
Injection molding is an engineering technology, and its content is to transform plastics into useful products that can adhere to their original functions. The important technological conditions of injection molding are the temperature, pressure and corresponding working hours that affect plasticizing activities and cooling.
When TPE raw materials are injected, how to adjust the injection temperature can achieve the best effect. In fact, the injection temperature of TPE raw materials mainly affects the oil filling ratio and molecular weight. Generally, the higher the oil filling ratio, the lower the injection molding temperature. In other words, the lower the hardness of TPE, the lower the injection molding temperature.
For some special materials, such as TPE raw materials adhering to PA, the injection temperature is increased due to the phase composition with high melting point in the formula. In addition, the greater the thickness of the product, the higher the injection temperature will be, and the equipment model and melting temperature will also make the injection temperature of TPE raw materials different.
1. Ultra-soft materials with 1.TPE hardness of 0C~15A and injection temperature of 130~200℃;
The recommended injection temperature is 140 ~ 230℃ for single material with 2.TPE/TPR hardness of 20~110A;
The recommended secondary injection temperature is 170~200℃ when PP is encapsulated in 3.TPE/TPR.
4.TPE/TPR encapsulated ABS,PC, the recommended secondary injection temperature is 180 ~ 220℃;
The recommended secondary injection temperature is 240~270℃ for 5.TPE/TPR encapsulated PA.
6.TPR encapsulated PS(HIPS,GPPS), and it is recommended that the secondary injection temperature be 160~190℃.
