How to reduce the hardness and enhance the abrasion Resistance of the TPU Granule?

3. Incorporating Abrasion-Resistant Fillers

To enhance abrasion resistance, experts suggest incorporating specific fillers like carbon black, glass fibers, silicone masterbatch, or silicon dioxide. These Fillers can bolster the TPU's wear-resistance properties.

However, careful consideration should be given to the quantity and dispersion of these fillers, as an excessive amount might affect the material's flexibility.

4.  Plasticizers and Softening Agents

As a method to reduce TPU hardness, TPU Manufacturers might use plasticizers or softening agents. It is important to select a suitable plasticizer that can lower hardness without compromising abrasion resistance. Common plasticizers used with TPU include dioctyl phthalate (DOP) and dioctyl adipate (DOA). Care must be taken to ensure that the chosen plasticizer is compatible with TPU and does not negatively impact other properties such as tensile strength or chemical resistance.  In addition, The dosage of plasticizers should be meticulously controlled to maintain the desired balance.

5. Fine-Tuning Extrusion and Processing Parameters

Adjusting extrusion and processing parameters is pivotal in achieving the desired combination of reduced hardness and enhanced abrasion resistance. This entails modifying parameters like temperature, pressure, and cooling rates during extrusion.

Lower extrusion temperatures and careful cooling can lead to softer TPU while optimizing the dispersion of abrasion-resistant fillers.

6. Post-Processing Techniques

Post-processing techniques like annealing, stretching, or even surface treatments can further enhance abrasion resistance without compromising hardness.

Annealing, in particular, can improve the crystalline structure of TPU, making it more resistant to wear and tear.