As the global "dual carbon" goals continue to advance and consumers' environmental awareness grows, the shoe material industry is undergoing a profound green transformation. Since 2024, from leading sports brands to upstream material suppliers, research, development, and application of bio-based materials, supercritical foaming processes, and recycling technologies have been accelerating, becoming a new watershed in industry competition.

At the recently concluded Jinjiang International Footwear Expo, several shoe material companies showcased their latest environmental achievements. A fully degradable sole material exhibited by a well-known Fujian shoe material company attracted widespread attention. This material uses biomass such as castor oil and corn straw as raw materials, replacing traditional petroleum-based polyurethane, reducing carbon footprint by about 40% and achieving industrial compost degradation under certain conditions, effectively alleviating the environmental pressure of discarded footwear. Industry insiders point out that the cost of bio-based materials has dropped nearly 30% compared to two years ago, transitioning from conceptual products to large-scale application.

Meanwhile, supercritical fluid foaming technology is reshaping the performance boundaries of midsole materials. Compared to traditional chemical foaming, this technology uses nitrogen or carbon dioxide to form microporous structures under high pressure, increasing the rebound rate of the midsole to over 75% while maintaining lightness and providing better durability. Currently, this process, once mainly used in top-tier running shoes, is rapidly trickling down to the mass sports shoe market. According to incomplete statistics, in the first quarter of 2024 alone, over 12 new sports shoe models equipped with supercritical foaming midsoles were launched in China, covering a price range from 300 to 1500 yuan, with a significant increase in market penetration.

In terms of recycling, chemical depolymerization technology has made substantial breakthroughs. Traditional physical recycling struggles to handle shoe soles composed of different materials, while new chemical methods can revert waste TPU, EVA, and other materials back to monomers, which are then repolymerized into new materials with performance close to virgin materials. A tech company in Guangdong revealed that its thousand-ton-scale chemical recycling pilot line has been running stably for over six months, and the soles made from recycled materials achieve over 90% of the key indicators of virgin materials, such as wear resistance and rebound, paving an important technological path for closed-loop recycling in shoe materials.

Policies are also continuously strengthening. The latest revision of the EU's "Sustainable Products Eco-design Regulation" imposes stricter requirements on the recyclability of materials and limits on harmful substances for footwear products entering the market. Domestically, the "Plastic Pollution Control Action Plan" further specifies the application proportion targets for degradable materials in key industries. Against this backdrop, brands such as Anta, Li-Ning, and Xtep have announced their low-carbon material roadmaps, requiring that by 2025, sustainable materials account for no less than 25% of their main shoe models.

Industry experts predict that in the next three years, technology paths represented by bio-based materials, supercritical foaming, and chemical recycling will accelerate integration, driving the shoe material industry from being "cost-driven" to "dual-driven by technology and environmental protection." Small and medium-sized manufacturers lacking green material R&D capabilities may face severe survival pressure, and industry reshuffling is expected to accelerate further. For shoe material companies, green transformation is no longer an "optional question" but a "mandatory question" about future survival.