SiO₂ barrier coating for cosmetic and chemical packaging
The cosmetics and chemicals industries place high demands on packaging that must protect against moisture, oils and chemical substances. With NP® SiOPack® , a water-based, inorganic SiO₂ thin-film technology is available that provides paper, carton and moulded fibre materials with a functional barrier layer that is environmentally responsible, food-contact compliant and sustainable.
The technology replaces conventional polymer-based coatings and enables the production of recyclable and compostable packaging suitable for cosmetic products and chemical substances — without compromising functionality or safety.
Functional principle of the coating
NP® SiOPack® uses a water-based sol-gel process to apply an ultra-thin SiO₂ layer (5-100 nm) to the paper surfaces. After drying, this layer forms a functional surface combining hydrophobic and oleophobic properties. The coating remains mechanically flexible and chemically stable, without altering the tactile feel or visual appearance of the base material.
Technical properties:
Water- and grease-resistant (ISO 535 / TAPPI T 559)
Low water vapour transmission rate (WVTR)
Antimicrobial / antiviral (ISO 22196 / ISO 18184)
Food contact compliant in accordance with BfR XXXVI
Free from fluoropolymers, solvents and microplastics
Fully recyclable within standard paper recycling streams
Functional principle of the coating
The SiO₂ barrier coating offers versatile application possibilities for the cosmetics and chemicals industries, enabling the development of sustainable and safe packaging solutions for a wide range of products.
Cosmetic packaging
Cream tubes, shampoo bottles, folding cartons
Key benefits
Moisture- and oil-repellent protection
Chemical packaging
Trays, cups, folding cartons
Key benefits
Oil resistance, dimensional stability and food-contact compliance
Secondary packaging
Secondary packaging for cosmetic products
Key benefits
Protection against external influences and enhanced sustainability
The NP® SiOPack® approach provides the cosmetics and chemicals industries with a sustainable, food-contact compliant and process-compatible solution that combines functionality with regulatory compliance — ideal for the development of innovative, environmentally responsible packaging solutions.