Koehler Paper has introduced a new heat-sealable packaging paper positioned as the lightest in its portfolio, as manufacturers continue to explore material reduction strategies in flexible packaging.
The product, NexPlus Seal Pure 36 gsm, has a grammage of 36 grams per square metre and is designed for use in flexible packaging applications. According to the company, the material can be processed on standard packaging equipment, including flow pack and wrapping systems, without requiring modifications to existing machinery.
The paper is also compatible with multiple printing technologies, including flexographic, digital and gravure processes, allowing converters to integrate it into established production workflows.
Material reduction is a central element of the development. By lowering grammage, the product is intended to reduce raw material consumption, potentially contributing to lower resource use during production. However, the broader environmental impact remains dependent on a range of factors, including transport efficiency, recyclability, and performance in real-world distribution conditions.
“The biggest challenge in production was speed, as the paper needed to remain stable at high operating speeds, both on our machines and on our customers’ packaging lines,” said Joachim Uhl, mill director at Koehler Paper in Kehl, Germany.
He added that the development was supported by investments in new production capabilities and the company’s technical expertise in packaging paper manufacturing.
The material’s relatively low opacity introduces additional application possibilities. Koehler Paper highlights its use in mailing formats, where partial visibility of contents allows recipients to view enclosed items or scan QR codes without opening the packaging.
“You can see what is inside the packaging or scan a QR code through it. That is what makes the material attractive for mailing brochures,” said Christoph Wachter, head of the Flexible Packaging Paper division at Koehler Paper.
The company states that the product is manufactured from 100% certified virgin fibre pulp, making it suitable for food-related applications, primarily as secondary packaging.
The launch reflects a broader industry shift towards lightweight materials aimed at reducing input use. However, the practical benefits of such solutions depend on their durability, protective performance and compatibility with existing recycling systems, which remain key considerations for converters and brand owners evaluating alternative packaging materials.
