Acrylic Resin Recycling Project（ Poly-Methyl-Methacrylate）

Abstract

The mass production, mass consumption, and mass disposal of plastics are exacerbating issues related to climate change and resource depletion. In 2015, global plastic production reached approximately 400 million tons per year, with waste amounting to about 300 million tons annually. In developed countries, the desire for "material wealth" continues to grow, while in emerging countries, population growth and economic development are expected to further expand plastic consumption activities and increase waste.

　Sumitomo Chemical aims to contribute to the realization of a sustainable society by developing various environmental impact reduction technologies, including reduction of CO₂ emissions, curbing fossil resources use, and promotion of resource circulation. Particularly for acrylic resin（ PMMA）, the company is focused on chemical recycling that leverages its depolymerization characteristics to obtain MMA monomers with high yields. In collaboration with The Japan Steel Works, Ltd., Sumitomo Chemical is developing a high-efficiency thermal decomposition process using a twin-screw extruder, aiming for early social implementation. This technology is expected to significantly reduce CO₂ emissions while maintaining the same quality as conventional PMMA. Furthermore, Sumitomo Chemical is promoting recycling through regional resource circulation projects with local governments and collaborative efforts with brand owners, advancing initiatives towards the realization of a sustainable society.