#Recycling / Circular Economy

2023-04-27

Asahi Kasei and Microwave Chemical launch joint demonstration project for chemical recycling of polyamide 66 using microwave-based technology

Asahi Kasei and Microwave Chemical launched a joint demonstration project in April 2023 with the objective of commercializing a chemical recycling process for polyamide 661 (PA66, also called nylon 66) using microwave technology. The process utilizes microwaves to depolymerize2 PA66 and directly obtain the monomers hexamethylenediamine (HMD) and adipic acid (ADA), which is expected to be accomplished at high yield with low energy consumption.

The monomers obtained can then be used to manufacture new PA66. In the demonstration, scraps from manufacturing and post-use waste material of PA66 for airbags and automobile parts are depolymerized.

Asahi Kasei currently produces fossil fuel–derived HMD and ADA as intermediates to manufacture Leona™ PA663, an engineering plastic featuring outstanding heat resistance and rigidity. PA66 is used in various applications, including plastic parts for automotive and electronic products, and yarn for airbag fabric, and its demand is expected to increase worldwide.

As the world moves toward carbon neutrality, attention is increasingly focused on manufacturing processes for reducing greenhouse gas (GHG) emissions from chemical products derived from fossil fuels. Microwave Chemical is promoting technological and business development to achieve carbon neutrality in the industrial sector focused on process development using microwaves, which can directly and selectively heat target substances with high energy efficiency. For chemical recycling, Microwave Chemical is advancing its proprietary PlaWave™ technology platform for decomposing plastic using microwaves.

Through development combining Asahi Kasei's experience in manufacturing HMD and ADA for more than half a century together with Microwave Chemical's achievements in the industrialization of microwave technology, the two companies aim to commercialize a manufacturing process for PA66 that can reduce GHG emissions compared to the conventional manufacturing process.

Laboratory-scale studies that began in fiscal 2021 have confirmed the high-yield depolymerization of PA66 using microwaves, as well as the principle of the separation and purification process after depolymerization. Bench-scale equipment will now be assembled at Microwave Chemical’s Osaka Factory by the end of fiscal 2023, and a small-scale demonstration trial using this equipment will be performed in fiscal 2024 to collect basic process data for commercialization.

Microwave Chemical’s PlaWave™ technology platform for decomposing plastic using microwaves can depolymerize PA66 with low energy and obtain HMD and ADA monomers in high yield. The manufacturing process for PA66 using HMD and ADA obtained by depolymerization with this technology is expected to reduce GHG emissions compared to the conventional PA66 manufacturing process, while further reduction of GHG emissions may be achieved by the use of renewable energy for the power required to generate the microwaves.

By verifying the process from depolymerization to separation and purification in an integrated manner, this demonstration project aims to enable resource circulation of PA66 for further reduction of GHG emissions.

Moving forward, based on the results of the small-scale demonstration trial, a decision on the possibility of commercialization will be made by fiscal 2025 following detailed analysis. Concurrently with the small-scale demonstration trial, construction of a business model that involves the entire value chain in the chemical recycling of PA66 will be advanced, aiming to achieve a circular economy together with stakeholders in the PA66 value chain.

Asahi Kasei aims to be a global partner for its PA66 customers by providing optimal solutions for their carbon neutrality initiatives through studies of the practical application of material recycling and chemical recycling as well as trials for the commercialization of PA66 made using biomass-derived intermediate4.

Microwave Chemical is working to increase the scale of equipment and to make PlaWave™ more generally applicable in order to achieve the practical application of the chemical recycling of polymethyl methacrylate (PMMA, also called acrylic resin), automotive shredder residue (ASR), plastic containers and packaging, flexible polyurethane foam, etc.

1) The main types of polyamide are polyamide 66 and polyamide 6, which have different chemical structures. With superior heat resistance and strength, polyamide 66 is widely used in industrial applications such as automotive and electronics.

2) The opposite of polymerization, depolymerization is the process of breaking down a polymer into a monomer or monomers by heat and other means.

3) Asahi Kasei is a manufacturer of engineering plastics such as polyamide 66, which is made from HMD and ADA, polyamide 6I, and polyamide 612, as well as polyamide 610, which is made based on plant-derived raw materials such as castor oil, and supplies optimal materials suited to various needs ranging from molding materials for automotive and electronics applications, airbag yarn and fabric, and tire cord.

4) Please refer to the press releases dated March 16, 2022:?

Genomatica and Asahi Kasei Partner on Renewably-Sourced Nylon 6,6?

https://www.asahi-kasei.com/news/2021/e220316_2.html

Asahi Kasei to accelerate trials for commercialization of polyamide 66 made using biomass-derived intermediate

https://www.asahi-kasei.com/news/2021/e220316.html

Asahi Kasei Advance to showcase high-performance non-woven and fibers at Techtextil 2026

Asahi Kasei Advance will present its portfolio of high-performance nonwovens, flame-retardant fabrics, and advanced textile and fiber solutions designed for various industries during its first-ever exhibition at Techtextil 2026. Techtextil is the leading international trade show for technical textiles and nonwovens, taking place from April 21-24, 2026, in Frankfurt, Germany. Asahi Kasei Advance will highlight 14 brands, with special focus on four key materials as its debut at the exhibition in Hall 12.1 at booth C35.

ROICA: Where distinction and intention shape the future of apparel industry at Milano Unica

At Milano Unica, held at Fiera Milano (Rho) in Milan from January 20–22, nine select European partners unveil collections shaped by ROICA™—the premium stretch fiber by Asahi Kasei. ROICA™ does not stand alone on the show floor, but its presence is quietly interlaced into each creation, chosen by those who seek distinction and depth in modern textiles. Through these dedicated collaborations, ROICA™ continues to sup-port the apparel industry with advanced stretch, comfort, and environmental care, offering something unique for brands who value true craftsmanship and thoughtful innovation.

Managed workwear services are providing a blueprint for the circular textile economy

Managed workwear service providers are demonstrating how commercial success and circularity can go hand in hand by extending garment lifespans through repair, laundering, reuse and recycling, according to “Managed workwear services—a circular textile economy ahead of the game”, a new 14‑page report from the global business information company Textiles Intelligence.

Eco-design as the foundation of circular textiles

Based on the results of an extensive European analysis, the Erasmus+ project Skills4Circularity is currently developing three practice-based training modules covering recycling technologies, eco-design for the circular economy and sustainable manufacturing. This was preceded by a comprehensive company survey and a joint analysis conducted by the project partners under the leadership of IVGT. The results show that the greatest challenges lie not so much in a lack of technology as in skills gaps.

Usha Yarns secures growth equity investment from Fullerton Carbon Action Fund

Usha Yarns Limited (“Usha Yarns”), a producer of high-quality recycled yarns with advanced, well established production processes, announced a growth equity investment from the Fullerton Carbon Action Fund (“Fullerton”), a private equity strategy managed by Fullerton Fund Management that backs established mid-market companies across Emerging Asia to accelerate decarbonisation.

PERFORMANCE DAYS announces new focus topic & forums for October 2026

With its upcoming October 13–14, 2026 edition, PERFORMANCE DAYS is placing the spotlight on one of the textile industry’s most important transformations: “Bio-Based Materials – From Fiber to Fabric”, a two-part Focus Topic exploring the future of bio-based innovation across the textile value chain. Part 1, presented in October 2026, will focus on fibers and next-generation material developments, while Part 2 at the March 2027 edition will shift the perspective toward dyeing, finishing, additives, and processing technologies.

Febratex 2026 to be the largest edition of the leading textile trade fair in the Americas with 10 exhibition halls

Febratex 2026 will be the largest edition in the history of the leading textile trade fair in the Americas. Dedicated to the textile and apparel manufacturing industries, the event will take place from August 18–21, 2026, in Blumenau, Santa Catarina, Brazil, with a strong focus on technology, sustainability, and business generation.

Cotton Brazil Dialogues field trip brings international stakeholders closer to Brazil’s cotton production chain

How do you build trust across the global textile value chain? By opening the farm gates. This is the principle behind the Cotton Brazil Dialogues. At the end of July, the programme welcomed its first group of international participants for a five-day immersion into Brazilian cotton production, combining field visits with technical workshops to showcase the quality, sustainability, innovation and traceability behind one of the world’s leading cotton origins.