NP^® SiOPack^® is a water-based, inorganic SiO₂ thin-film barrier coating technology​ that provides paper, board and moulded fibre products with a highly effective barrier against moisture, oils, fats and microorganisms.
The coating contains no polymer-based plastics and enables fully recyclable and compostable paper packaging solutions.

In practical terms:
NP^® SiOPack^® replaces conventional plastic coatings with an ultra-thin, mineral protective layer made of silicon dioxide (SiO₂).

The coating is applied directly to the paper surface using a sol-gel process .
After drying, a transparent SiO₂ layer only a few nanometres thick, is formed, combining:

• hydrophobic properties (moisture protection)

• oleophobic properties (grease and oil resistance)

• mechanical flexibility

- without altering the haptics, printability or appearance of the paper.

Yes. NP^® SiOPack^® is a sustainable, plastic-free barrier coating offering the following environmental benefits:

• compostable

• recyclable within standard paper recycling streams

• PFAS-free

• free from microplastics

• water-based, without solvents or fluoropolymers

This makes NP^® SiOPack^® fully aligned with today's requirements for sustainable packaging solutions.

NP^® SiOPack^® is versatile and suitable for, among others:

• Food packaging
  (e.g. bakery bags, window bags, takeaway trays)

• Pharmaceutical & healthcare packaging
  (e.g. packaging for tablets, ointments and medical products)

• Cosmetics & chemicals
  (e.g. packaging for creams, liquids and powders)

• Technical applications
  (e.g. paper composites for the automotive and electronics industries)

Yes, in addition to rigid packaging, NP^® SiOPack^® is ideal for flexible paper packaging such as:

• pouches

• wrapping papers

• folding and wrapping materials

The SiO₂ layer remains functional even under bending and folding stress.

For food packaging, NP^® SiOPack^® offers key advantages:

• plastic-free barrier against grease, moisture and microorganisms

• food-contact compliant to BfR XXXVI

• compostable and recyclable

• ideal for bakery, takeaway and fresh food packaging

The coating thickness is approx. 5-100 nanometres.
Despite the extremely low layer thickness, NP^® SiOPack^® provides highly effective barrier protection.

NP^® SiOPack^® is compatible with:

• coated and uncoated paper

• board and carton

• moulded fibre products

The technology is suitable for both inline and offline processing and can be applied using:

• slot-die coating

• blade coating

• roller coating

In most cases, no modification of existing production lines is required.

NP^® SiOPack^®:

• replaces conventional plastic barrier layers

• reduces overall material usage

• lowers CO₂ emissions compared to polymer coatings

• utilises a water-based, solvent-free technology

Production is based on natural, mineral raw materials (SiO₂).
The coating is:

• biologically harmless

• compostable

• recyclable within standard paper recycling streams

NP^® SiOPack^® complies with, among others:

• BfR XXXVI - food contact compliance

• PTS-RH 021:2012 - recyclability

• PFAS-free

• microplastic-free

NP^® SiOPack^® is compatible with standard coating systems and supports:

• drying below 120 °C

• reduced energy consumption

Yes, the technology is designed for production speeds of up to 300 m/min, making it ideal for industrial-scale manufacturing.

Yes. NP^® SiOPack^® complies with applicable food safety regulations according to BfR XXXVI and can be safely used for food packaging applications.

For pricing, availability and orders, please contact us:

📧 info@siopack.eu
or via our website contact form.

Yes, we provide samples, so that you can test the SiO₂ barrier coating under real production conditions.

Detailed application examples are available on our website or through a personal consultation with our expert team.