1. Wear resistance requirement sole
The wear resistance of flame-retardant synergistic sole foam material is one of the important indicators of the performance of sports shoes, which directly affects the service life of the shoes and the user experience of consumers. Based on the search results, we can compare and analyze the anti abrasion of several common shoe sole foam materials.
Firstly, EVA material is widely used in shoe midsoles due to its lightweight, easy processing, and good resilience
. However, the aging resistance, flexural resistance, elasticity, and wear resistance of pure EVA foam material are relatively poor, which limits its application in the field of high-performance sports shoes
. In order to improve the wear resistance of EVA, it can be improved by changing the content of diisopropylbenzene peroxide (DCP) and azodicarbonamide (AC) in the EVA sole foam material, adding calcium carbonate to the formula, and partially replacing EVA with ethylene propylene diene monomer (EPDM) rubbe
TPU (thermoplastic polyurethane elastomer) is another commonly used material for shoe sole foaming, with high tensile strength, large elongation, and low long-term compression permanent deformation rate. The foamed TPU (ETPU) exhibits good resilience
. The preparation process of TPU shoe midsole includes supercritical foaming and steam forming processes. Among them, aliphatic TPU has stronger tear resistance and yellowing resistance compared to aromatic TPU, in addition to high resilienc
PEBA (nylon elastomer) is favored as a high-end shoe material due to its flexibility and low-temperature impact resistance. PEBA foam material has been applied in sports brand related shoes, such as Nike Zoom Vaporfly Elite running shoes
In terms of comparing anti abrasion, a study tested the anti abrasion of EVA, rubber foam, TPR foam, and PU foam materials using the national standard wear resistance method, DIN wear resistance method, and NBS anti abrasion method. The results showed that the order of wear resistance was: rubber foam>PU foam>TPR>EVA, with rubber foam material showing the best wear resistance performance.
2. Wear resistance agent for Xiangxichem
DX052P is a high molecular weight silicone masterbatch using EVA as the carrier. DX052P is mainly used in shoe sole, and rubber material. It has better dispersibility and compatibility in plastics, while having less impact on material mechanical properties. DX052P has better demolding performance and smoothness. It also solve the problems of black line, bubble and membrane. And improve the performance of wear-resistant.
