In June 2026, Blue Ocean Closures launched Paper-Plug, an integrated fibre-based screw closure system designed to enhance functionality in carton and corrugated packaging.
The brand has expanded its boundaries with the launch of fiber-based packaging functionality, the Paper-Plug range, an integrated opening and dispensing system designed to be embedded directly into carton and corrugated board structures.
The innovation of the new launch combines an internal-fiber screw closure with a board-based packaging format. It helps to enable new product architectures that traditionally rely on materials such as glass, metal, or plastic components. The brand integrated the closure mechanism directly into fiber substrates to eliminate the need for separate plastic or metal dispensing parts, while maintaining usability and performance.
The newly launched sustainable mechanism reflects a modern solution that can be incorporated into a wide range of applications, including dry and frozen foods, ingredient packaging, cleaning products, refill, and reuse systems, as well as hybrid carton and corrugated board formats. According to the company, the system also supports reduced fossil material dependency, along with offering potential carbon footprint reductions through increased fiber content.
Previously, fiber-based packaging was strong in structural performance and surface quality, but it also had limited functional features such as resealable openings, controlled dispensing, and durable closure systems. The Paper-Plug range is designed to smartly deal with such obstructions with the help of an integrated screw-based closure made from fiber materials interacting directly with the packaging board.
“Paper packaging has historically been strong in surfaces and structure but limited in functionality wherever advanced opening, dispensing, and reclosure features were needed,” said Staffan Andersson, CTO at Blue Ocean Closures. “With Paper-Plug, we want to expand what paper packaging can become. We believe this opens a completely new design space where sustainability, convenience, and economics increasingly reinforce each other rather than compete.”
The company also states that the system has been engineered not only for sustainability performance but also for industrial adaptability, allowing the converters and brand owners to integrate it into existing packaging production workflows with minimal disruption.
Blue Ocean closures plans to make the newly launched packaging available through both standardized solutions and collaborative development models. The main aim of the company’s dual approach was to encourage broader industry adoption, along with allowing for brand-specific differentiation and proprietary applications.
Allowing the platform to be accessed by converters, brands, and technology partners, the main aim of the company involves accelerating the development of next-generation fiber-based packaging systems, combining functionality as well as recyclability. The main aim of the strategy is to make a major shift towards collaborative innovation in sustainable packaging design, where material suppliers and brands work together to overcome technical barriers of fiber-based alternatives.
The launch of Paper-Plug is accompanied by a series of developments in fiber-based closures across the packaging industry. Earlier in 2026, the company introduced a fiber-based cap for nutraceutical applications, replacing metal closures in vitamin packaging and targeting reductions in product carbon footprint. The NutraCap solution is designed to be recyclable within paper streams and is made from renewable fiber sources.
Other industries are also adapting to sustainable technology in today’s era. For example, PulPac has developed a new generation of dry-moulded fibre caps in collaboration with PA Consulting and Optima, aiming to replicate the functionality and user experience of plastic closures while maintaining fibre-based material structures.
Such innovations reflect the development of fiber-based technology and its components, especially in areas where plastic majorly dominates due to performance requirements.
Introduction of fiber-based closures, such as Paper-Plug, reflects a major shift in the industry towards monomaterial and fiber-led packaging systems. The procedure involves embedding functionality directly into fiber structures, while the developers aim to reduce material complexity, improve recyclability, and support regulatory trends focused on the reduction of plastic use.
Growing consumer awareness leading to growing demand for sustainable, renewable, and low-carbon packaging solutions, fiber-based innovations, and moving beyond the traditional boxes and cartons into complex functional components, also helps to fuel the growth of the brand. This expansion of capability is expected to play a key role in enabling wider adoption of fibre-based packaging across food, consumer goods, and industrial applications.
The company was founded in 2021 and is headquartered in Karlstad, Sweden. The company is an innovative packaging start-up developing bio-based, fiber-based closures and lids designed to replace traditional plastic and metal caps. The major technology used helps to shape sustainably sourced cellulose fibers into durable, recyclable caps, significantly reducing fossil-based plastic usage and carbon footprints.
31 July 2026
30 July 2026
30 July 2026
30 July 2026