#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

ROICA™ brings global textile innovation to Functional Fabric Fair Portland

ROICA™, the premium stretch fiber by Asahi Kasei, will make its debut appearance at Functional Fabric Fair Portland on October 27-28, 2026, at the Oregon Convention Center (Stand 256). Bringing together textile developments from partner companies across Europe and Asia, the ROICA™ booth will present a diverse collection of fabric solutions for performance, outdoor, mobility, swimwear, cy-cling, and lifestyle applications.

ROICA™ presents stretch textile innovations from nine partners at PERFORMANCE DAYS 2026

ROICA™ by Asahi Kasei will return to PERFORMANCE DAYS Munich on October 13–14, 2026, presenting textile developments from seven European partners and two Japanese specialists under its global brand message, “STRETCH YOUR FUTURE.” Visitors can discover the developments at Booth P10 in Hall A4.

Toray develops Polyester-Nylon fiber containing at least 93% recycled material by mass

Toray Industries, Inc., announced today that it has developed a polyester-nylon fiber with at least 93% recycled content by mass, based on the total weight of the raw yarn. This percentage applies to the newly developed raw yarn and does not represent the recycled content of the finished fabric or garment.

Canopy shifts focus towards recycling and traceability in updated Hot Button criteria

Environmental non-profit organisation Canopy has introduced revised criteria for its annual Hot Button Report, which evaluates producers of man-made cellulosic fibres (MMCFs), including viscose, lyocell and acetate. The updated framework places greater emphasis on scaling alternative fibre sources, improving supply chain traceability and supporting forest conservation, while maintaining responsible sourcing as a central requirement.

The Or Foundation, adidas, BESTSELLER, H&M Group, and Inditex launch Apparel Recovery Coalition, responding to impacts of post-consumer textile exports

adidas, BESTSELLER, H&M Group, Inditex and The Or Foundation, with support from Circle Economy, unveiled the Apparel Recovery Coalition (ARC). The coalition will explore how producer responsibility systems can support circular pathways such as reuse, upcycling, recycling, and responsible waste management in countries that receive large volumes of exported secondhand apparel.

Syre appoints Tim King as CEO

Syre has appointed Tim King as its new Chief Executive Officer, succeeding Dennis Nobelius, who has decided to leave the company after more than three years as CEO to pursue new opportunities in another industry. King, who has been with Syre since its early days, has been responsible for the company's industrial development and the execution of its strategy.

Aachen Summer School: Textiles become smart through 3D printing and origami

From 21 to 29 September 2026, the Aachen Summer School will transform Institut für Textiltechnik (ITA) of RWTH Aachen University into a laboratory of the future: over the course of a week, students will use origami folding techniques and 3D printing to develop active textile structures capable of performing programmable movements. This interdisciplinary event combines theoretical foundations with practical prototyping – from digital modelling right through to functional textile prototypes.

Trützschler to showcase innovations in spinning preparation and nonwovens at ITMA Asia 2026

From November 20 to 24, 2026, the Trützschler Group will present its latest fiber processing technologies at ITMA Asia in Shanghai, China. At Hall 5.1, Booth D20, the company will showcase solutions designed to increase productivity, simplify operations and improve efficiency across spinning preparation and nonwoven production. Key highlights include the automated can transport system T-CAN, the next-generation card TC 30, innovative card clothing solutions such as STEELTOP and SUPERFLOW, as well as advanced nonwoven technologies for hygiene, wipes and filtration applications.

Mayer & Cie. Global gears up tor ITMA Asia 2026

Mayer & Cie. Global will focus on mattress fabric production at ITMA Asia, taking place in Shanghai from 20 to 24 November 2026. The company will showcase one of its flagship models for this application: the OVJA 2.4 EM. Joining the mattress fabric specialist will be an OV 3.2 QCe, presented at ITMA Asia in a configuration for knitting double-face fabrics in E40. This gives the OV 3.2 QCe a combination of capabilities rarely found in the market. The German textile machinery manufacturer will also introduce its new portfolio strategy and share updates from its development team at its Albstadt headquarters.