How to prevent “separation” of steel toed protective shoes

1. Raw material reasons: domestic or foreign polyurethane raw materials are not good, a large number of broken bottom caused by return. Not only the sole but also the shoes, resulting in millions of yuan of losses. 1n the 1980s, Shanghai banned the use of polyurethane sole because of broken sole. After years of continuous improvement and practice, the domestic raw material technology has completely passed the standard, and the bottom breaking event caused by raw materials has rarely occurred. 1f the raw material selection is wrong, the hardness is excellent, and the temperature is too low. 1f the adjustable range of the stock solution is too wide or too narrow, it is difficult to find the central formula (the best formula) and easy to break the bottom