The extrusion speed for TPU (Thermoplastic Polyurethane) can vary depending on several factors, including the specific type of TPU, processing equipment, and the intended application of the extruded product. Here are some general guidelines, but it's important to note that specific recommendations should come from the material supplier or the manufacturer of your extrusion equipment:

1. **Consult Material Data Sheet:**

   - Refer to the material data sheet provided by the TPU manufacturer. It typically includes recommended extrusion temperatures and processing parameters, including extrusion speed.

2. **Equipment Guidelines:**

   - Follow the guidelines provided by the manufacturer of your extrusion equipment. Different extruders may have varying capabilities and optimal operating conditions.

3. **Material Type and Grade:**

   - Different types and grades of TPU may have different optimal processing conditions. Factors such as molecular weight, hardness, and additives can influence extrusion speed.

4. **Die Design:**

   - The design of the extrusion die can impact the extrusion speed. Ensure that the die is properly designed for processing TPU, and refer to any guidelines provided by the die manufacturer.

5. **Product Specifications:**

   - Consider the specifications of the final product. Different applications may require different extrusion speeds to achieve the desired properties and dimensions.

6. **Start Conservatively:**

   - When starting a new extrusion process or using a new TPU formulation, it's advisable to begin with conservative extrusion speeds. This allows you to monitor the process and make adjustments as needed.

7. **Testing and Optimization:**

   - Conduct extrusion trials at different speeds to evaluate the material's processability and the quality of the extruded product. Optimize the speed based on the results.

8. **Consistent Processing Conditions:**

   - Maintain consistent processing conditions, including temperature, screw speed, and feed rate, to achieve stable extrusion performance.

9. **Consider Downstream Processes:**

   - If the extruded material will undergo additional downstream processes (e.g., forming, molding, or coating), consider how the extrusion speed may affect compatibility with these processes.

10. **Safety Margins:**

    - Ensure that the selected extrusion speed allows for a safety margin, and avoid operating at the maximum capability of the equipment.

It's crucial to work closely with the TPU manufacturer and the equipment supplier to obtain specific recommendations based on the unique characteristics of the TPU material you are using and the extrusion equipment in your facility. Additionally, conducting thorough testing and process optimization is key to achieving consistent and high-quality extrusion results.