Rottneros Packaging | Blue Ocean Closures
About us
Rottneros Packaging AB, a leader in thermoformed moulded pulp processes for over 15 years, is part of the Rottneros Group, which boasts a 130-year history of excellence in the pulp production business.
Our innovative packaging solutions, made from responsibly sourced renewable materials, minimize plastic use without sacrificing efficiency. Discover Rottneros' commitment to sustainability with NATURE™, our sustainable trays for food packaging. Our approach includes FSC-certified North European cultivation, eco-friendly pulp production, and biodiversity focus.
Designed for sustainability, our products have a reduced CO2 footprint, are PFAS-free, and use minimal plastic for effective barriers. Compatible with European recycling systems, they consist mostly of fiber and less than 10% plastic.
Our packaging enhances eco-friendly brand perception, insulates hot trays, and ensures easy disposal and recycling. With expertise from pulp sourcing to distribution, we offer seamless integration into existing lines, interchangeable with plastic formats, supporting a shift to wood fiber. Standard tray sizes minimize time and costs to market, while personalized formats are available with full support from design through to full-scale production.
A breakthrough solution for sustainable packaging, Blue Ocean Closures fibre-based closures are built to build brands. Designed for recyclability, engineered for reality and creating true impact.
Sustainable by design, our closures are the first of a kind, destined to transform the packaging industry.
Recyclable as paper, the products are designed to maximise plastic reduction and minimize carbon footprint.
Commercial impact by differentiation, making products visible on the shelves, strengthening brand values and appeal to consumers, combined with proven compatibility and offering a seamless switch in existing systems, a drop-in solution requiring no or minimal adaptions.
Products & services
Paper-plug
Blue Ocean Closures introduces Paper-Plug™, a new generation of integrated fiber-based openings expanding what paper packaging can do. The new opening and dispensing concept, combines a fiber internal screw closure with a direct interface to carton and corrugated board structures. Adding to the leading position in fiber-based screw caps and lids, Blue Ocean Closures’ Paper-Plug concept opens up new possibilities for convenient, low-cost and low-carbon packaging across food, home care and a broad range of future applications. Unlike traditional approaches that often rely on tear openings, separate plastic fitments or more complex assemblies, Paper-Plug™ is designed to integrate directly into board-based packaging structures, creating a new route toward highly functional renewable packaging solutions while maintaining simplicity and cost efficiency. Consumers love convenience. By combining low cost fiber forming with direct integration into paperboard, the concept enables packaging formats that previously have often depended on glass, metal or plastic, while creating opportunities for new consumer experiences and new product architectures. Paper-Plug™ is enabled by Blue Ocean Closures’ proprietary forming technology, developed to produce advanced fiber components with low energy consumption and at industrial speed. Potential application areas include: Dry and frozen foods and ingredients Supplements and health products Home care and cleaning products Refill and reuse systems E-commerce packaging Premium cartons and hybrid board formats New convenience packaging concepts previously difficult to achieve in paperboard
NutraCap brown
NutraCap Natural Brown - Available in 38, 45 & 53 mm
Trays for salmon
Nature trays by Rottneros are a revolutionary solution to replace plastic packaging with a more sustainable option. Made from high-qualitry fsc certified fibres produced from renewable forests in EU, our trays are fully recyclable in the paper stream, meeting the Cepi standard (4ever egreen). Our trays can reduce the plastic content up to more that 90% while maintaining the same reliable shelf life as traditional packaging. Perfect to preserve food in map and skin packaging, our trays can withstand mricrowave and oven heating applications. No use of harmfull chemical (PFAS free).
Trays for skin
Nature trays by Rottneros are a revolutionary solution to replace plastic packaging with a more sustainable option! With minimized plastic content favoring natural wood fibers from sustainably managed forests and circular economy, our trays hold all the features needed for case ready meat packing – hygiene, lightness yet robustness, various packing styles (map, stretch seal, flowpack, heat sealing …), personalizing options… In addition to premium appearance and functionality, our trays stand out for several key reasons: • Sustainable Material Sourcing: Sawmill wood waste is used to create the pulp for our trays, minimizing wood waste and promoting sustainable forestry practices. All material is sourced from sustainably managed forests very close to the mills. • Significant Plastic Reduction: Trays can be sealed in map and skin to achieve exceptional performance with minimal plastic content (less than 10%) is a significant breakthrough, enabling extended shelf life and microwave use while minimizing plastic waste. • Enhanced Recyclability: o Standard Recyclability: Our trays are designed for standard paper recycling streams, contributing to a circular economy. Our trays have been assessed for recyclability according to the CEPI 2 method, demonstrating their compatibility with standard paper recycling streams. o Improved Recyclability with Liner Separation: The option for removable liners (PP, PE, and bio-based) further enhances recyclability by allowing for easy separation and proper recycling of both the tray and the liner. Bio-based liners can be composted, while the clean fibers go into paper recycling. • Focus on Sustainability: Production processes prioritize renewable energy and closed-loop water systems, minimizing environmental impact. • Chemical-Free Approach: Our trays are free from harmful substances like PFAS, PVC, inks, and other prohibited chemicals, ensuring food safety and environmental responsibility.
Trays for pasta
Nature trays by Rottneros are a revolutionary solution to replace plastic packaging with a more sustainable option. By combining sustainability, performance, and a focus on reducing environmental impact, our trays offer a truly innovative and forward-thinking solution for food packaging. In addition to premium appearance and functionality, our trays stand out for several key reasons: • Sustainable Material Sourcing: Sawmill wood waste is used to create the pulp for our trays, minimizing wood waste and promoting sustainable forestry practices. All material is sourced from sustainably managed forests very close to the mills. • Significant Plastic Reduction: Trays can be sealed in map and skin to achieve exceptional performance with minimal plastic content (less than 10%) is a significant breakthrough, enabling extended shelf life and microwave use while minimizing plastic waste. • Enhanced Recyclability: o Standard Recyclability: Our trays are designed for standard paper recycling streams, contributing to a circular economy. Our trays have been assessed for recyclability according to the CEPI 2 method, demonstrating their compatibility with standard paper recycling streams. o Improved Recyclability with Liner Separation: The option for removable liners (PP, PE, and bio-based) further enhances recyclability by allowing for easy separation and proper recycling of both the tray and the liner. Bio-based liners can be composted, while the clean fibers go into paper recycling. • Focus on Sustainability: Production processes prioritize renewable energy and closed-loop water systems, minimizing environmental impact. • Chemical-Free Approach: Our trays are free from harmful substances like PFAS, PVC, inks, and other prohibited chemicals, ensuring food safety and environmental responsibility.
Trays for ready meals ready for oven
Nature trays by Rottneros are a revolutionary solution to replace plastic packaging with a more sustainable option! With minimized plastic content favoring natural wood fibers from sustainably managed forests and circular economy, our trays hold all the features needed for a ready meal tray – heat resistance in the microwave and traditional ovens, and shelf life extension. In addition to premium appearance and functionality, our trays stand out for several key reasons: • Sustainable Material Sourcing: Sawmill wood waste is used to create the pulp for our trays, minimizing wood waste and promoting sustainable forestry practices. All material is sourced from sustainably managed forests very close to the mills. • Significant Plastic Reduction: Trays can be sealed in map and skin to achieve exceptional performance with minimal plastic content (less than 10%) is a significant breakthrough, enabling extended shelf life and microwave use while minimizing plastic waste. • Enhanced Recyclability: o Standard Recyclability: Our trays are designed for standard paper recycling streams, contributing to a circular economy. Our trays have been assessed for recyclability according to the CEPI 2 method, demonstrating their compatibility with standard paper recycling streams. o Improved Recyclability with Liner Separation: The option for removable liners (PP, PE, and bio-based) further enhances recyclability by allowing for easy separation and proper recycling of both the tray and the liner. Bio-based liners can be composted, while the clean fibers go into paper recycling. • Focus on Sustainability: Production processes prioritize renewable energy and closed-loop water systems, minimizing environmental impact. • Chemical-Free Approach: Our trays are free from harmful substances like PFAS, PVC, inks, and other prohibited chemicals, ensuring food safety and environmental responsibility.
Recycle-ready trays with peeltab
Nature by Rottneros® – Innovation Features Fiber-Based. Functional. Circular. 1. Smart Material Design Our trays are made from virgin FSC®-certified wood fibre, combined with a very thin functional film layer. → Delivers shelf-life extension and resistance to microwave and conventional oven, with minimal plastic use. 2. Proven Paper Recyclability All trays in the Nature by Rottneros® range are recyclable in standard paper mills. Independently tested according to CEPI Recyclability Laboratory Test Method – Version 3 (Feb 2025) Standard Mill recyclability confirmed under the 4evergreen (4EG) evaluation protocol 3. Designed for Easy Separation Trays are supplied with a peel tab enabling easy liner separation. → Plastic and fibre can be separated manually before disposal. ✔ Separability score: A (highest level) ✔ Tested according to Aticelca 502:2022, the only recognized methodology for manual separability of paper-based multi-materials 4. Real Circularity in Practice By maximizing fibre recovery, our trays support a true circular loop: • ✅ More fibre returned to the paper recycling stream • ✅ Higher-quality recycled paper • ✅ Increased circularity across the entire value chain ________________________________________ Innovation that makes a difference For the environment. For our customers. For the future of food packaging.
Print-ready trays with premium surface
Nature by Rottneros trays express the authentic colour and purity of Scandinavian wood fibres, combined with a carefully engineered outer surface. Unlike conventional moulded fibre trays, the external layer is refined to deliver a controlled, consistent texture that feels natural yet premium to the touch. This engineered paper surface is not only tactile—it is functional. It is designed to act as a high-quality substrate for multiple marking and printing technologies, enabling brand, product and regulatory information to be applied directly on the fibre. Depending on the application and investment level, trays can be personalised using digital printing, inkjet printing or laser marking, each offering different visual outcomes. Critically, this approach supports packaging reduction. No separate labels are required and, in the case of laser marking, no inks are used at all. The tray itself becomes the information carrier—supporting traceability and emerging requirements such as the Digital Product Passport, where each tray can be uniquely identified and digitally linked without adding extra materials. The result is a fibre-based tray where material authenticity, surface engineering and regulatory readiness are integrated by design.
Trays for pasteurisation in microwave process
Our microwave-ready trays have been successfully validated for pasteurisation in a continuous microwave tunnel. Functional testing was conducted in collaboration with a well-known brand, confirming performance under industrial conditions.
NutraCap white
NutraCap white + available in 38, 45 & 53 mm.
