A major step toward 90% paper content in SIG aseptic cartons by 2030
SIG has entered a strategic partnership with PulPac, the global leader in Dry Molded Fiber technology, to jointly develop and scale the next generation of paper-based closures for aseptic cartons. This innovation aims to match the performance and convenience of traditional plastic closures while significantly reducing plastic use.
The collaboration represents a key milestone in SIG’s ambition to increase the paper content of its aseptic cartons to 90% by 2030, including the closure. In 2024, SIG targets an interim goal of 85% paper content (excluding closures) as part of its mission to create a fully regenerative food packaging system.
Unlocking the Potential of Dry Molded Fiber
PulPac’s Dry Molded Fiber technology uses a dry fiber web instead of a traditional fiber slurry, minimizing water usage during production and delivering substantial CO₂ reductions compared to plastic alternatives. This innovative process also provides:
- High-volume scalability for mass production
- Design flexibility for customized closure solutions
- Lower environmental impact, supporting a circular economy
Gavin Steiner, Chief Technology Officer at SIG, stated:
“We believe in Dry Molded Fiber technology as one of the most scalable fiber-based solutions to replace plastic closures. Our goal is to create a closure where both the base and cap are paper-based—significantly increasing the paper share in our cartons while maintaining the same consumer convenience and first-class opening performance.”
Seamless Integration with Existing Systems
SIG’s unique post-application process ensures that closures are applied after the carton is sealed and sterilized, maintaining aseptic integrity. This approach enables plug-and-play compatibility with SIG’s existing filling machines and closure applicators—ensuring an easy transition to paper-based closures without altering the production process.
Christoph Wegener, Chief Markets Officer at SIG, commented:
“For sustainability-driven packaging innovations to have real impact, they must work with existing infrastructure. Plug-and-play solutions are a design principle for SIG. By combining aluminum-free materials with paper-based closures, we’re advancing toward 90% paper content in our aseptic cartons—a breakthrough for the industry and a step closer to a true circular economy.”
A Breakthrough for Sustainable Packaging
This partnership positions SIG and PulPac at the forefront of sustainable packaging innovation. By leveraging advanced fiber technologies and ensuring seamless production integration, the two companies aim to replace a significant amount of plastic closures annually, accelerating the transition to renewable, fiber-based solutions.