SIG, PulPac partner to advance sustainable packaging with paper-based closures

SWEDEN – SIG, a leading provider of aseptic carton solutions, has joined forces with PulPac, a Swedish innovator in Dry Molded Fiber technology, to develop paper-based closures for SIG’s aseptic cartons. 

The collaboration aligns with SIG’s ambitious goal to increase the paper content in its packaging to 90% by 2030, reducing reliance on fossil-based materials and cutting carbon emissions.

According to SIG’s chief technology officer, Gavin Steiner, “Dry Moulded Fibre technology paves the way for innovative and responsible alternatives to plastic closures.”

“It’s a scalable solution with immense potential to accelerate the shift to paper-based packaging while maintaining the convenience and performance consumers expect.”

The partnership leverages PulPac’s technology, which forms a dry web of fibres, slashing water usage and emissions compared to traditional plastic production. 

This method also offers design flexibility and supports high-volume manufacturing, making it ideal for large-scale adoption.

The initiative focuses on creating closures that seamlessly integrate with SIG’s existing aseptic carton systems. In a statement, SIG’s chief markets officer, Christoph Wegener, emphasized the importance of compatibility: 

“For sustainable innovations to make a real impact, they must work with existing machinery. Our ‘plug-and-play’ approach ensures paper-based closures can be applied without disrupting production, paving the way for a circular economy.” 

This strategy builds on SIG’s aluminium-layer-free packaging, aiming for a breakthrough in achieving 90% paper content in full-barrier cartons.

For 2025, SIG targets 85% paper content in its cartons, excluding closures, as a stepping stone toward its 2030 vision. 

The post-application process for closures, applied after filling and sealing in an aseptic environment, ensures product safety and supports the transition to paper-based solutions without compromising functionality.

SIG teams up with Sole-Mizo to install aseptic filling machine

In 2024, SIG partnered with Sole-Mizo to install a cutting-edge SIG Midi 12 Aseptic filling machine.

This machine will fill a wide range of Sole-Mizo dairy products into two highly appreciated SIG packaging formats: SIG MidiBloc and SIG MidiFit.

This collaboration introduces the SIG MidiFit family pack to Hungarian consumers for the first time. The unique shape and design of SIG MidiFit stand out on supermarket shelves, offering benefits such as drip-free pouring and easy opening and closing for both vertical and horizontal storage.

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