Stable MFI or MI (Melt Flow Index) is an important factor in TPU (Thermoplastic Polyurethane) processing for several reasons:

Process Consistency: MFI represents the flowability of the TPU material during processing. Stable MFI ensures consistent and predictable flow behavior, which is crucial for achieving uniform product quality and avoiding defects or variations in the final product.

Ease of Processing: TPU materials with a stable MFI are generally easier to process. They have better melt stability, it becomes easier to optimize the processing conditions such as temperature, pressure, and screw speed to achieve the desired flow properties and product performance. This leads to smoother and more efficient processing with reduced downtime and scrap rates.  Reduced scrap rates resulting in more efficient use of the material and reduced waste.

In summary, a stable MFI in TPU processing is important for ensuring process consistency, optimal processing conditions, ease of processing, desired product performance, and efficient material usage. It helps manufacturers achieve better control over the production process and deliver high-quality TPU products.