Industrial waste management is a major headache that the footwear sector in the Valencian Community is determined to solve once and for all. Thanks to the support of the Ministry of Industry, Tourism, Innovation and Trade, an initiative has been launched that aims to provide a second life for polyurethaneThis material, which until now usually ended up in landfills due to its complex structure, is now being recycled. This project not only aims to reduce environmental impact but also seeks to establish a production system where nothing is wasted and everything is reintroduced into the assembly line.
The initiative, dubbed VAL-rPU-CALZADO, focuses on recovering high-value raw materials through techniques that combine the best of mechanics and chemistry. It's no small feat, as we're talking about processing thermoset plastics that can't simply be melted down and reshaped. The idea is for companies to stop relying so much on virgin materials and begin to look at what they previously considered mere garbage with different eyes, turning it into high-quality components for the shoes we wear every day.
Glycolysis and molecular recovery of materials
To achieve this milestone, researchers are relying on a chemical process called glycolysis. Essentially, they are breaking down the molecular chains of leftover polyurethane from factories to obtain recycled polyolsThese compounds are fundamental, since once recovered they can be mixed into new formulas to manufacture soles and other components with mechanical properties that are in no way inferior to those of conventional materials.
Unlike more rudimentary methods that simply shred the waste for use as low-quality filler, this technology allows the material to retain its original value. Progress has been made towards a Industrial validation at semi-industrial scaleThis means the invention works and the quality levels achieved are very close to what the current market demands. The next steps are already in place: obtaining the necessary certifications and preparing the ground for this technology to reach factories commercially soon.
Collaboration between technology centers and companies in the sector
This advance is not the result of chance, but rather a fairly solid alliance between different players in the industrial sector. Synthelast is leading the coordination of the development of these new polymers, while a well-known brand such as Pikolinos is responsible for validating The recycled soles meet customer expectations in terms of comfort and durability. Meanwhile, the Inescop technology center contributes its expertise in chemical recycling and material characterization to ensure the entire process is technically viable.
The initiative also has the backing of the firm Onditec to optimize processes and, very importantly, the financial support of the European Union through the FEDER Comunitat Valenciana program. This entire working ecosystem aligns with decarbonization strategies, seeking drastically reduce CO2 emissions through the valorization of waste. It is a way to demonstrate that innovation can be profitable and sustainable at the same time, positioning Spanish industry as a benchmark in the circular economy.
This project marks a turning point in how footwear components are manufactured and disposed of in Europe. By integrating advanced processes that allow for the recovery of previously wasted resources, a much more efficient model is achieved that protects the environment without compromising the quality of the final product. This opens a promising path for other sectors that use similar polymers. adopt these recycling technologies advance and leave behind the old use and discard model.
