Polysil Paper for hydrophobizing paperboard

Nanoprom Chemicals has developed and tested Polysil Paper, a coating to protect paper and paperboard from water and moisture.
The coating is based on patented sol-gel processes, Polysil Paper creates cold vitrification on the substrate by following the micro-movements of the surface without altering the structure and providing total and effective protection from water.

Polysil Paper has unique advantages over other surface treatments:

• is the best choice for eliminating plastic from cardboard packaging;
• Is completely recyclable;
• Is a food-tested product;
• imparts several properties to the treated substrate, including high hydrophobicity, which is crucial here because it makes the paper water-repellent. It also confers resistance to acids (Polysil Paper is stable from pH=2 to pH=11).

The ability to make paper and paperboard impermeable, or at least semi-impermeable, to water represents a significant breakthrough in many applications. One tangible example involves disposable items (such as plates, straws, etc.) that were commonly made of plastic in the past. Cardboard packages no longer need to be protected with plastic covers to shield them from the weather.

In the image a drop after 10s and 120s on untreated cardboard (top) and on treated cardboard (bottom)