PROTECTIVE COATING

SELF-CLEANING NANO-HYDROPHYLIC COVER NICHIGUARD

Fibrocement panels and accessories NICHIHA are long-lasting and keep its features in any climate and weather conditions.

Concrete and wood fiber are the main components in NICHIHA panels. Even after several processes, these materials could still be influenced by the environment. Have a look at some regular ten-twenty years old buildings in your city: they might look just fine from the outside but the whole facade has plain, old look.

Trust the quality. Save the beauty.

Air pollution and precipitation are the main factors that influence the visual appearance of materials. Facade looks bad with all the dirt and dust traces which appear after the years of exploitation. Luckily, Japanese engineers were able to deal with this problem using fibrocement as one of the components in the panels. Thanks to this solution, the look of the modern city was changed forever in a better way.

BARRIES FOR THE FACADE DIRTYING

There are a lot of kinds of dirtying and pollution in the modern city. Most of them worsens the visual appearance and mechanical properties of façade materials

According to studies, around 70% of dirtying is caused by bad urban environment.

Exhaust fumes, dirty water coming from barrier walls and sill rails, dust, oil, condensate – all of these dirtyings are pretty common for urban environment. All of it can not be cleaned by just water because everything that we mentioned before contains oil with its hydrophobic properties.

  • Rainbow dirtying appears because of leaching of soluble components of plaster and concrete. This process forms the thin rainbow film on the panels.
  • Lime bloom appears in a concrete solidification process when calcium hydroxide turns into calcium carbonate and settles on the surface of the panels.

Most of the dirtyings, caused by urban environment, appear through the contact with rainwater. Dust and suspended solids of different materials entering the air settle on the surface of the panels. Then, all of it mixes with rainwater and drains down. That’s how sustainable dirtying is formed.

BEAUTY FOR YEARS

Preserving of the beauty and cleanness for years – that is the aim of our environmental policy: the rarer facade elements are changed, the less the carbon footprint. Concern for beauty equals concern for long-lasting. It’s not a surprise that Japan’s life expectancy is the highest in the world. 

In most cases the panels’ dirtying is the main reason for facade panels replacement.

NICHIGUARS cover has a unique ability for self-cleaning. Water film forms on the panels’ of surface and prevents the dirtying because of existing moisture and precipitations in the atmosphere. That’s how the layer of water on the panels’ surface is formed. After the rain, the dirt is washed with this layer and other protective layer appears.

This technology protects the panels from natural pollutions which allows to make them look as brand new for many years.

Rainwater and snow leave the smudges around window frames. With the help of NICHIGUERAD cover you will never face with this problem.

You can get a better effect from NICHIGUARD cover if you combine it with another NICHIHA invention PLATINUM COATING cover which protects panels from weather conditions – UV light and weathering.

NICHIGUARD TECHNOLOGY

SILICON BASED

The main component of NICHIGUEARD COVER is particles of silicon oxide (SiO2) which contains mica and aluminosilicate with great electric- and heat-insulation properties. These particles have high hydrophilic properties and they capture water molecules from the air.

Thickness of water film ranges from 100 to 300 nanometers. Thickness of silicon particles is around 10-30 nanometers.

ENGAGEMENT ANGLE, HYDROPHILICITY AND HYDROPHOBICITY

Engagement angle defines the hydrophilicity (the ability to absorb water) and hydrophobicity (the ability to repel water) for each of solid bodies during the interaction process of solid bodies’ surfaces and liquids. Engagement angle is quantitative feature of wetting process. The trick is simple: water doesn’t go directly into the fibrocement panel and absorption doesn’t happen. The process that is happening, according to physicists, is called wetting – the forming of nanofilm out of water molecules.

HYDROPHILICITY PROVIDES SELF-CLEANING

NICHIGUARD cover layer is evenly distributed silicon particles containing hydroxyl groups (OH) where oxygen and hydrogen are bound by a covalent bond. Hydroxyl is the one who captures the water molecules (H2O) from the air and forms a thin molecular water film on the surface of the processed fibrocement plate. This nanofilm prevents the emergence of static electricity and makes it difficult for dust and dirt to stick to the panels’ surface. Surprisingly, this film allows you to clean the surface even if the dust and dirt are stuck on it.

On such film water stays for longer than dust and dirt. That’s why particulate matter absorbs in the water film, not allowing hydrophobic kinds of dirtying (smoke, smog and exhaust fumes) settle on the surface.

During precipitations, the film is being washed away taking all the dirt with it. This process is called self-cleaning.

The surface covered with NICHIGUARD photographed by electronic microscope with increases in 50 000 times. You can see that silicon particles are evenly distributed along the surface.

Stratus structure of mica provides cleat, elasticity and resistibility. It maintains clear and unified configurations of molecules even on extremely thin layers.

RESISTANCE TO MOLD AND FUNGUS

Protective properties of NICHIGUEARD are not limited only to mechanical impacts.

Water film physical properties and special antibacterial supplement significantly reduce the growth of microorganisms. Till now this effect was tested only in Japanese laboratories and the result is not assured.*

*The testing was held in laboratory of Nichiha company in Japan on the limited number of samples. Some kinds of mold, moss and algae might differ from the tested ones and have high resistance.

You can get a better effect from NICHIGUARD cover if you combine it with another NICHIHA invention PLATINUM COATING cover which protects panels from weather conditions – UV light and weathering.

Nanohydrophil cover NICHIGUARD protects panels from exhaust fumes, smoke, dust and soil sticking. In extremely polluted areas NICHIGUATD could not be as effective as it is in less polluted zones. Rust and dirt with a high density and viscosity could also reduce the effectiveness of the NICHIGUARD cover.

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