The process temperature or extrusion temperature of TPU (Thermoplastic Polyurethane) can be influenced by several factors. Here are some key factors that can impact the TPU process temperature or extrusion temperature:

TPU Grade: Different grades of TPU may have varying recommended process temperatures. Different grades may with distinct different thermodynamic characteristics. It is important to refer to the supplier's specifications or technical data sheet for the specific grade of TPU being used.

Processing Equipment: The type and specifications of the extrusion or molding equipment being used can impact the process temperature. Different machines may have different temperature ranges or capabilities. And the injection molding temperature is different with the extrusion molding temperature even for the same grade.

Melt Flow Index (MFI): TPU materials with different melt flow index may require different process temperatures. TPU with higher MFI usually requires lower extrusion temperatures.

TPU Thickness: Thicker sections or parts of TPU may require higher process temperatures to ensure proper melt flow and adhesion between layers.

Processing Speed: The speed at which TPU is extruded or molded can affect the process temperature. Higher processing speeds may require higher temperatures to maintain consistent flow and quality.

Material Preheating: Preheating the TPU material before processing can help achieve better melt consistency and reduce the required process temperature.

It is essential to consult the specific guidelines provided by the TPU manufacturer and conduct trial runs to determine the optimal process temperature for a particular application. Factors such as TPU grade, equipment, and final TPU products should be considered to ensure successful processing and desired material performance.