Advanced fiber based closures – step 1

An estimated 2,500,000 tons of plastic used for plastic closures (2,500 billion @ 1 gram). Much of these are for advanced solutions and applications. By showing that fiber materials can be used for these, we show that shaped fiber materials have potential to replace plastics in the most advanced applications. Fiber-based closures eliminate microplastics and can reduce CO2e by 75-87%. The project has great potential and great risk and is thus a typical Moon-shot-project.

Blue Ocean Closures’s (BOC’s) press molding technology makes it possible to manufacture screw caps that replace plastic caps. These are typically stronger and more rigid than HDPE plastic caps. In the project, the design of a reference cork is adjusted, a tool is manufactured, corks are pressed under real process conditions and then tested. The products are tested with regard to function, economy and durability. The project links to established packaging concepts as well as growing segments like now when the EU venture into more reusable bottles that are washed and refilled with new closures.


Blue Ocean Closures and Karlstads University.

Budget & time plan

The project’s total budget is 1 MSEK and the project runs during six months – between November 2023 and April 2024 2023.