2025.02.17
Production process of PU soles: the mystery from raw materials to finished products
The soles made of polyurethane arewidely used in sports shoes, leather shoes, safety shoes and other fields dueto their advantages of lightness, wear resistance and comfort. So, how is anexcellent pair of polyurethane soles produced? This article will take you intothe deep understanding of the production process of polyurethane soles anduncover the mystery from raw materials to finished products.
1. Raw Material Preparation
1. Polyol (referred to as A):
2. Isocyanate (referred to as B):
Isocyanates are another major feedstock,reacting with polyols to form polyurethanes.
3. Additive (referred to as C material):
In order to improve the performance of thesole, some additives will be added, such as catalysts, blowing agents, flameretardants, etc.
2. Production Process
1. Prepolymer Preparation:
The A and B materials are mixed in acertain proportion, and the mixing reaction is generated to cure at a certaintemperature.
2. Mixing and Foaming:
The AB material, additives and blowingagent are mixed and injected into the mold for foam forming.
3. Curing and Shaping:
The sole after foam molding needs to beaged and shaped at a certain temperature and humidity to obtain stableperformance.
4. Post-processing:
The soles after aging need to be trimmed,polished, painted and other post-treatment processes to obtain the finalappearance and performance.
3. Factors Affecting Sole Quality
1. Raw Material Quality:
High-quality raw materials are the basisfor the production of high-quality soles.
2. Process Parameters:
The accuracy of temperature, pressure, timeand other parameters is crucial to the quality of the sole.
3. Equipment Accuracy:
High-precision production equipment is theguarantee of sole quality
4. Future development trend
1. Eco-friendly materials
With the increasing awareness ofenvironmental protection, the use of renewable resources and degradablematerials will become the trend of the future.
2. Personalized customization
Customized soles to meet the individual needs of consumers will become a new market growthpoint.
Conclusion
The production process of polyurethanesoles is a complex and fine process, which requires strict control of allaspects of production in order to produce high-quality soles.
Company Development