TPE products may crack for various reasons, with the most common being weather-related and material strength. When the weather is cold, the molecular structure of TPE material changes, resulting in reduced tensile strength and eventually leading to cracking. Additionally, if the material's low-temperature tensile deformation resistance decreases, it can also cause cracking. To solve this problem, it is recommended to use a base material that maintains its tensile strength at low temperatures.

In addition to weather-related and material strength reasons, cracking in TPE products may also be caused by other factors, such as poor aging resistance of SBS-based TPR, which can lead to cracking due to aging; cracking in SBS-based TPR shoe materials during the process of brushing glue, which may be caused by glue corrosion; and cracking in TPE products with low hardness and thick dimensions due to insufficient injection molding pressure, which can result in stress contraction and severe cracking. To solve these problems, it is recommended to pay attention to the amount of glue used, avoid it from hardening; and strengthen molding pressure to eliminate stress contraction.