Technology
NP® SiOPack® is a water-based, inorganic SiO₂ thin-film technology that provides paper, board and moulded fibre products with a reliable barrier against moisture, grease and microorganisms - without the use of polymeric coatings.
The barrier layer is only 5-100 nm thin, remains invisible to the naked eye and does not alter the haptics or visual appearance of the paper-based material.
Developed for industrial packaging applications, tested in accordance with international standards and designed for sustainable recycling-compatible packaging systems.
The coating system is based on a water-based sol-gel process,
in which SiO₂ particles form an inorganic, glass-like protective barrier layer on the fibre surface.
After drying, a chemically stable, elastic and strongly adherent thin film is formed,
which reduces surface tension and imparts hydrophobic and oleophobic properties.
Depending on the application, the coating remains invisible. In the Glassine by NP® SiOPack® variant, it is optically transparent and replaces plastic windows in paper packaging, remaining fully recyclable within the paper recycling stream.
NP® SiOPack® can be integrated into existing coating lines without modification -
ideal for converters, paper manufacturers and OEMs.
By using NP® SiOPack® polymer-based barrier layers can be completely replaced.
This enables the production of sustainable, plastic-free and recyclable packaging solutions with a high level of functionality and full industrial scalability.