Blue Ocean Closures has introduced Paper-Plug, a fiber-based opening and dispensing system designed for carton and corrugated board packaging.

The system uses an internal fiber screw closure linked directly to board structures, differentiating it from formats that rely on tear openings, added plastic components, or more complex assemblies. According to the company, it is designed to integrate into board-based packs while keeping the overall structure relatively simple and aimed at cost efficiency.

Paper-Plug is based on the company’s forming technology for fiber components, which the company says operates with low energy use and at industrial production speeds. The format is intended for use in dry and frozen foods, ingredients, health products, home care and cleaning products, refill and reuse systems, as well as premium cartons and hybrid board formats.

The company says the concept aligns with broader packaging industry priorities, including ease of use, reduced dependence on fossil-based materials, a potentially smaller carbon footprint, and compatibility with barrier elements where needed.

Staffan Andersson, chief technology officer of Blue Ocean Closures, said, “Paper packaging has historically been strong in surfaces and structure but limited in functionality wherever advanced opening, dispensing and reclosure features were needed. 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.”

Nissha, a technology company, invested in Blue Ocean Closures last year, also becoming a co-owner of the Swedish startup.