In the ever-evolving world of footwear manufacturing, the choice of materials plays a crucial role in determining the quality, durability, and performance of the final product. Various types of resins, including PVC (Polyvinyl Chloride), RB (Rubber), PU (Polyurethane), and TPR (Thermoplastic Rubber), are commonly used in the industry. To enhance the durability and wear resistance of shoes, fillers like calcium powder are often added.
Let’s explore some common sole materials and the application of inorganic fillers within them:
01. RB Rubber Soles
Rubber soles, made from either natural or synthetic rubber, are known for their softness and excellent elasticity, making them ideal for various sports. However, natural rubber is not very wear-resistant, making it more suitable for indoor sports shoes. Typically, precipitated silica is used as a filler to reinforce the rubber soles, with small amounts of calcium carbonate added to enhance wear resistance and anti-yellowing properties.
02. PVC Soles
PVC is a versatile material used in products like plastic sandals, miner boots, rain boots, slippers, and shoe soles. Lightweight calcium carbonate is commonly added, with some formulations incorporating 400-800 mesh heavy calcium depending on the specific requirements, typically in quantities ranging from 3-5%.
03. TPR Soles
Thermoplastic Rubber (TPR) combines the properties of rubber and thermoplastics, offering the elasticity of rubber while being processable and recyclable like plastics. Depending on the required properties, formulations may include additives such as precipitated silica, nano-calcium, or heavy calcium powder to achieve desired transparency, scratch resistance, or overall durability.
04. EVA Injection-Molded Soles
EVA is widely used for mid-soles in sports, casual, outdoor, and travel shoes, as well as in lightweight slippers. The primary filler used is talc, with an addition rate varying between 5-20% based on quality requirements. For applications requiring higher whiteness and quality, 800-3000 mesh talc powder is added.
05. EVA Sheet Foaming
EVA sheet foaming is used in various applications, from slippers to mid-soles, with the sheets being formed and cut into various thicknesses. This process often involves the addition of 325-600 mesh heavy calcium, or even finer grades such as 1250 mesh for high-density requirements. In some cases, barium sulfate powder is used to meet special requirements.
At XINZIRAIN, we continually leverage our deep understanding of material science to deliver innovative and high-quality footwear solutions. Understanding the intricacies of sole materials allows us to produce shoes that meet the highest standards of durability, comfort, and design. By staying at the forefront of material innovation, we ensure that our products not only meet but exceed the expectations of our global clients.
Post time: Aug-19-2024
