SK chemicals, Dongsung Chemical, and Black Yak Collaborate on Commercializing Sustainable Footwear

The three companies introduced this product after a year of collaboration. SK chemicals is the supplier of 100% bio-based polyol "ECOTRION," while Dongsung Chemical develops the bio-polyurethane resin "NEOPAN®" for footwear using this as a raw material. Utilizing this material, Black Yak produced the "Foot Pillow Cushioning Foam," which is applied to the heel support layer of the midsole to minimize loading on the ankle and knee joints.

The midsole of trekking shoes is a key component that determines the footwear's weight and acts like a car's suspension to provide the level of function. Cushioning is important because the midsole must absorb the impact on the body and ensure safe strides, even on rough terrain.

Dongsung Chemical's bio-polyurethane resin "NEOPAN" for footwear maintains the high elasticity and flexibility of existing polyurethane resins while using bio-based raw materials, providing the shock absorption function of the "Foot Pillow Cushioning Foam."

ECOTRION, utilized in NEOPAN, is an eco-friendly material that uses raw materials that reduce greenhouse gas emissions by approximately 40% in comparison to conventional petrochemical raw materials. It is utilized in the production of spandex, artificial leather, and urethane elastic materials that are challenging to recycle. ECOTRION has one less carbon atom in its chemical structure compared to petrochemical materials, which gives it a helical-shaped polymer structure that enables the production of products with high elastic resilience, similar to a spring.

Kim Eung-soo, Head of SK chemicals' Green Materials Business Division, stated, "Bio-materials, along with recycled plastics, are one of the promising alternatives to replace petrochemical materials. We plan to actively highlight the sustainability and functionality of PO3G, focusing on big brands that are leading the sustainable trend with bio-materials."

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