About the Use of Double Sole in Safety Shoes

When it comes to the combination of soles for labor insurance shoes, the dual-sole system has become the most practical and effective solution. This design leverages the wear-resistant and anti-slip properties of the outsole to protect the foot soles, while the midsole offers a lightweight and soft feel, ensuring comfort during long hours of walking.

Currently, the best material combination is RU/PU, where rubber (RU) is used for the outsole and polyurethane (PU) for the midsole. These two components are bonded together using adhesives or chemical bonding methods, with PU itself providing natural adhesion. Additionally, the outsole can be polished, engraved, or customized to meet specific design needs.

Another popular option is the PU/TPU (polyurethane/thermoplastic polyurethane) combination. The outer sole made from TPU is highly durable and resistant to wear, while the midsole made from PU ensures a comfortable and flexible fit. TPU also allows for vibrant color options and intricate designs, making it a favorite among modern shoe designers who seek both functionality and visual appeal.

A third common double-sole structure is PU/PU, where both the outsole and midsole are made from polyurethane. However, this requires different types of polyurethane: the outsole must be made from dense, high-density polyurethane to ensure durability and resistance, while the midsole uses foamed polyurethane for cushioning and comfort. Companies like Shanghai Chi Ning Industrial Development Co., Ltd. use advanced German Bayer secondary foam technology to produce high-quality labor safety shoes that offer excellent wear resistance, slip resistance, and overall comfort.

China Labor Insurance Network