How to control the hardness and elasticity of PU shoe molds during production to meet the needs of different footwear?
Publish Time: 2025-01-02
As a high-performance material, PU (PU) plays a vital role in shoe mold manufacturing. In order to meet the needs of different footwear, it is crucial to accurately control the hardness and elasticity of PU shoe molds during production.The hardness and elasticity of PU shoe molds are mainly affected by a variety of factors such as the ratio of raw materials, the use of additives, and reaction conditions. During production, the hardness of PU can be changed by adjusting the ratio of isocyanate and polyol. Generally, increasing the amount of isocyanate can increase the hardness of PU, while increasing the amount of polyol can help reduce the hardness. This adjustment needs to be made according to the specific needs of footwear to ensure that the shoe mold has sufficient support and maintains appropriate elasticity.In addition to the ratio of raw materials, the use of additives is also an important means to control the hardness and elasticity of PU shoe molds. For example, plasticizers can enhance the toughness of PU while reducing its hardness; while fillers can change its overall performance by increasing the volume of PU. When selecting and using additives, it is necessary to fully consider their specific impact on the performance of shoe molds and conduct rigorous testing to ensure quality.Reaction conditions such as temperature and time will also affect the hardness and elasticity of PU shoe molds. During the preparation process, high temperature and long reaction time often lead to increased hardness and strength of PU. Therefore, by precisely controlling the reaction conditions, the performance of the shoe mold can be further optimized.It is worth noting that the hardness and elasticity control of PU shoe molds is not static. With the continuous changes in market demand and technological advances, the requirements for shoe mold performance are also constantly increasing. Therefore, manufacturers need to pay close attention to market dynamics and technological developments, and constantly adjust and optimize production processes to meet the needs of different footwear.In summary, the hardness and elasticity control of PU shoe molds is a complex and delicate process that requires comprehensive consideration of multiple factors such as raw material ratios, additive use, and reaction conditions. By precisely controlling these factors, PU shoe molds with excellent performance can be produced to meet the needs of different footwear.
