News Environment & Sustainability Packaging
Voith strengthens its involvement in the 4evergreen alliance with sustainable packaging projects

Voith is strengthening its commitment to the 4evergreen alliance with several pioneering projects. Among other things, the focus is on innovative processes for dissolving barrier papers on an industrial scale.

The alliance reportedly consists of over 110 members representing the entire life cycle of fibre-based packaging – from forest owners to producers, designers, brand owners and recyclers. Together, they share their expertise to develop tools and guidelines for an even more sustainable sector. As a member of the “Novel Recycling Technologies” Working Group within 4evergreen’s Innovation Workstream, Voith helps develop new solutions. Members from other workstreams also draw on Voith’s expertise in stock preparation and recycling concepts.

Voith shares in a press statement that its commitment focuses on researching and developing innovative pulping concepts to increase the recyclability of fibre-based packaging. The capabilities of the Voith Fiber Technology Center (FTC) play a crucial role in this. The FTC serves as a test environment for the recyclability of packaging papers and enables the investigation and development of sustainable solutions in close cooperation with other members of the alliance.

The FTC focuses on projects that address the challenges of sorting and recycling barrier paper and board products. Technologies and processes are being developed to increase the overall recycling rate of fibre-based packaging. The project is divided into three main steps: First, preliminary studies will be conducted to identify the most promising dissolution concepts. The best-evaluated concept will then be tested as a pilot project at the Fiber Technology Center (FTC). After the test runs, the concept will be further optimized and additional investigations will be carried out to ensure the best possible processing of the recovered raw material.

As part of this cooperation, Voith is carrying out comprehensive investigations and trials. Technologies such as near-infrared measurements and NDR measurements are used to detect stickies and other impurities that are introduced into the system via the raw material. These enable the precise analysis of the properties of paper grades and the detection of impurities such as stickies, but also polyethylene, which is frequently used in barrier papers. The knowledge gained forms the basis for the development of novel pulping concepts and the analysis of the efficiency of cleaning aggregates. A total of around 70 NIR (Near InfraRed) measurements were carried out on selected raw materials to evaluate the different barrier properties.