The addition of a steel sole to PVC rain boots is a specialized manufacturing process that combines durability with chemical resistance. During production, the steel sole is placed directly onto the mold before the PVC material is injected, ensuring it becomes an integral part of the boot's structure. This method allows the steel to be securely embedded within the PVC sole, which is typically a two-layer design featuring a foamed polyvinyl chloride intermediate layer for shock absorption and a durable running layer resistant to abrasion and deformation. The resulting boots are tested for impact and wear resistance, making them suitable for harsh environments where protection against chemicals, oils, and physical hazards is required.
Key Points Explained:
-
Placement of the Steel Sole
- The steel sole is positioned on the mold before the PVC injection process begins. This ensures the steel is fully encapsulated by the PVC material, creating a seamless bond.
- The mold design accommodates the steel component, allowing the PVC to flow around it uniformly during injection.
-
Injection Molding Process
- PVC material is injected into the mold, surrounding the steel sole and forming the boot's sole structure.
- The two-layer sole design includes:
- A foamed polyvinyl chloride intermediate layer for shock absorption, reducing impact loads.
- A rigid running layer resistant to abrasion and deformation, enhancing durability.
-
Material Properties and Chemical Resistance
- The PVC sole is engineered to withstand exposure to oils, petrol, acids (up to 20% concentration), and alkalis (up to 20% concentration).
- The steel sole adds structural integrity, while the PVC layers provide flexibility and chemical protection.
-
Quality Testing
- Boots with steel soles undergo impact resistance and wear resistance tests to ensure they meet durability standards.
- These tests validate the boot's ability to perform in demanding industrial or hazardous environments.
-
Applications and Benefits
- Ideal for workplaces requiring slip resistance, chemical protection, and foot safety (e.g., construction, manufacturing, chemical handling).
- The combination of steel and PVC offers a balance of strength, comfort, and longevity.
By integrating the steel sole during the molding phase, manufacturers create boots that are both protective and resilient, meeting the needs of professionals in high-risk settings.
Summary Table:
| Key Step | Process Detail |
|---|---|
| Steel Sole Placement | Positioned on the mold before PVC injection for full encapsulation. |
| Injection Molding | PVC surrounds the steel, forming a two-layer sole (shock-absorbing + rigid layer). |
| Material Resistance | Resists oils, petrol, acids (≤20%), and alkalis (≤20%). |
| Quality Testing | Impact and wear resistance tests ensure durability in harsh environments. |
| Applications | Ideal for construction, manufacturing, and chemical handling. |
Need durable, chemical-resistant footwear for your workforce?
As a large-scale manufacturer, 3515 produces high-performance PVC rain boots with integrated steel soles, designed for industries demanding slip resistance, chemical protection, and long-term durability. Our boots undergo rigorous testing to meet safety standards in hazardous environments.
Contact us today to discuss bulk orders or custom solutions for distributors, brand owners, and industrial clients!
