#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.

Reju opens its first R&D Center in the U.S. in Conshohocken, Pennsylvania

Reju, the company specializing in textile regeneration, today announced the opening of a Research and Development (R&D) Center in Conshohocken, Pennsylvania, the company's first proprietary research center in North America. Located within Technip Energies' existing Advanced Materials and Catalysts research center, the lab will allow Reju to accelerate the rollout of its recycling technologies and develop its next-generation circular solutions.

New skills for a circular textile economy

Based on the results of a comprehensive analysis, the Erasmus+ project Skills4Circularity is developing three practical training modules covering recycling technologies, eco-design for the circular economy and sustainable manufacturing. The content of the first module, Recycling Technologies, has now been developed and validated together with industry representatives. The module provides participants with knowledge of regulatory requirements, material sorting and the preparation of textile waste for recycling.

Itema reaffirms its commitment to the Syrian textile industry at NasTex 2026

From July 18th to 21st, Itema will exhibit at NasTex at the Damascus Fairground (Hall 11 – Stand C02), marking its return to one of the Middle East’s historically significant textile markets. Itema will showcase advanced weaving technology designed to support the competitiveness and technological evolution of Syrian manufacturers and announces a new partnership with Growfast Agency as the sole agent of Itema in Syria.

KARL MAYER's HKS 2-SE Expands Possibilities for Premium Stretch WARP KNITS

Warp knitted fabrics with a woven look are more in demand than ever in the fashion and apparel industries. Stretch WARP KNITS, in particular, impress with their freedom of movement, breathability, and virtually wrinkle-free wear – thereby opening up new style worlds such as smart casual or business casual. When it comes to the highly efficient production of premium-quality stretch WARP KNITS, the HKS 2-SE has long been the machine of choice. KARL MAYER’s best-selling tricot machine produces standard elastic fabrics characterized by high gauges, smooth, delicate surfaces, and a soft hand feel.

JEC Forum Southeast Asia 2026 highlights Taiwan as a strategic hub for the global composites industry

The third edition of JEC Forum organized in Southeast Asia brought together 350+ participants from 22 countries for three active days of high-level Business Meetings, conferences, and networking, emphasizing Southeast Asia’s growing role in the global composites market. Held for the first time in Taipei from 23 to 24 June 2026, following the successful first editions in Bangkok, JEC Forum Southeast Asia 2026 confirmed its position as the region’s leading business platform dedicated to the composites industry.