NKK & Lenzing AG Celebrating 25 Years “Separator Paper Production With LENZING™ Lyocell Fibers”


Nippon Kodoshi Corporation (NKK) is proud to celebrate 25 years of the successful production of NKK Cellulion® separator papers, produced using LENZING™ Lyocell fibers, developed and supplied by Lenzing AG, the Austrian-based technology-leader for specialty wood-based cellulose fibers. The separator papers, which are 100% cellulose in composition, are used in electric double-layer capacitors (EDLC), Lithium-ion batteries (LiB), and other energy storage devices.

The continued development of battery technologies emphasizes the need for further optimization in thickness reduction and performance of separator papers. The demand for increasingly sophisticated electrical storage devices and the required separator papers has grown since early adoption in aluminum electrolytic capacitors and they are now a vital part of the e-mobility revolution. Designed to enable sustainable energy solutions, the microfibrillar structure and thermal stability of LENZING™ Lyocell fibers make them a suitable ingredient in electrical separators for applications such as Lithium-ion batteries, supercapacitors, and electrolytic condensers, particularly in the new generation of electric vehicles.

“We are proud to be on such an exciting journey with NKK. Together we are making an important contribution to reducing global CO2 emissions through the development of high-efficiency cellulose-based separator materials,” reflected Jürgen Eizinger, Vice President of Global Nonwovens Business, Lenzing AG. “The long-standing cooperation between our two companies combined with the low environmental impact of LENZING™ Lyocell fibers, which originate from renewable raw material wood, provides a beacon for tackling global warming.”

“NKK is delighted to celebrate our long-standing cooperation with Lenzing AG,” said Shunji Chikamori, President of NKK. “Separator papers with LENZING™ Lyocell fibers, produced using NKK’s optimized paper manufacturing technology, have set the standard for our LEAF (LiB, EDLC, Alkaline and Functional) product portfolio. LENZING™ Lyocell fibers are an essential component in engineering quality performance of our materials.”

Lenzing and NKK are both committed to utilizing low environmental impact manufacturing to achieve decarbonization, echoing the Paris Climate Agreement’s goal to achieve net-zero emissions by 2050. Through the partnership, Lenzing and NKK have been key drivers in accelerating the development of novel fiber and separator products respectively, continuing to provide sustainable solutions for future transport and energy needs.

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