Mitsui Chemicals, Polyplastics Announce Partnership Regarding Marketing Operations for Engineering Plastic Products
2025.10.27
Mitsui Chemicals, Inc.
Polyplastics Co., Ltd.
Mitsui Chemicals, Inc. (Tokyo: 4183; President and CEO: HASHIMOTO Osamu, hereinafter referred to as "Mitsui Chemicals") and Polyplastics Co., Ltd. (Tokyo; President and CEO: MIYAMOTO Takashi, hereinafter referred to as "Polyplastics"), a wholly owned subsidiary of Daicel Corporation (Tokyo: 4202; President and CEO: SAKAKI Yasuhiro, hereinafter referred to as “Daicel"), today announced that the companies have entered into a contract regarding marketing operations for engineering plastics products, specifically ARLEN® and AURUM® brands developed and sold by Mitsui Chemicals (hereinafter referred to as “Contract").
Under this Contract, starting January 1, 2026, Mitsui Chemicals will consign certain marketing operations to Polyplastics. Polyplastics will exclusively handle marketing activities such as customer interface, new customer development, and technical support.
Mitsui Chemicals will continue to handle research and development, manufacturing, logistics and other such business operations for ARLEN® and AURUM®. There are no plans to change commercial distribution or related procedures.
Mitsui Chemicals aims to achieve further business growth by leveraging Polyplastics' customer network and solution capabilities to meet the growing demand for high-performance engineering plastics in the automotive, electrical and electronics sectors.
Meanwhile, Polyplastics will enhance its ability to provide solutions to an even larger number of customers by enriching its product portfolio with the addition of marketings operations for ARLEN® and AURUM®.
Both companies will explore further opportunities to deepen their collaboration in the future.
On October 16, 2025, Daicel announced “Polyplastics to split under Daicel Group’s reorganization plan.” stating that Daicel is currently considering transferring Polyplastics’ engineering plastics business as of April 1, 2026. The Contract is planned to be transferred to Daicel as of April 1, 2026.
■ About ARLEN®
Developed and launched by Mitsui Chemicals in the 1980s ahead of the competition, ARLEN® is a polyamide known for its high heat resistance and excellent chemical resistance.
By incorporating aromatic rings into its basic skeleton, the material achieves high heat resistance – boasting a melting point of 330°C – and overcomes the problem of water absorption that had been inherent to conventional polyamide resins.
Dedicated site: https://jp.mitsuichemicals.com/en/special/arlen/
■ About AURUM®
AURUM® is a world-leading heat-resistant thermoplastic polyimide resin, offering not only excellent heat resistance, mechanical properties and electrical properties but also thermoplasticity suitable for injection and extrusion molding. The material has a glass transition temperature of 250°C and is capable of withstanding long-term use at 240°C.
Dedicated site: https://jp.mitsuichemicals.com/en/special/aurum/
■ About Mitsui Chemicals, Inc.
Mitsui Chemicals’ corporate mission is "To contribute broadly to society by providing high-quality products and services to customers through innovation and the creation of materials, while keeping in harmony with the global environment." The company is currently working to transform its business portfolio in line with its VISION 2030 Long-Term Business Plan.
By expanding solutions-based business models, working on initiatives for a circular economy and strengthening business foundations through digital transformation – as outlined in VISION 2030 – the company aims to swiftly address social challenges and contribute to a sustainable future.
■ About Polyplastics Co., Ltd.
Polyplastics serves as the core group company responsible for Daicel’s engineering plastics business. Engineering plastics are high-performance resins characterized by their excellent mechanical strength, heat resistance, and chemical resistance, and contribute to a rich and convenient lifestyle through their use in automobiles, home appliances, mobile phones, robots, and packaging for food and pharmaceuticals. Polyplastics supports manufacturing around the world through innovative solutions aimed at achieving a future society that is kind to both the earth and people.
