X-MINING Preventing Excessive Temperatures in Greenhouses NIR Absorbing Materials

Farming in greenhouse is essential to protect crops and workers from pests and weather damage. On the other hand, the inside of closed greenhouses
in midsummer can become the sauna exceeding 40 degrees caused by sunlight irradiation, and and it caused high temperature damage of crops and heatstroke of farming workers.

There are some ways to prevent the temperature rise, such as rolling up the sheets that cover the house and opening the doorways, but they are inefficient and can be counterproductive.

Is it possible to prevent room temperature rise in agricultural greenhouses efficiently?

The photosynthetic absorption wavelengths of chlorophyll pigments, which have significant impact on crop growth, have peaks around 660nm (red) and 480nm (blue). White reflective materials and cold screens used for heat shielding in general agricultural greenhouses physically shield light energy, and thus insufficient uptake of visible light around 500 to 700nm has been a problem.

If we had a material that could transmit only the light necessary for the crop while cutting heat from sunlight, we could improve the room temperature rise in the house in midsummer.

Near-Infrared Absorbing Materials CWO™ has both high heat shielding and transparency.
SMM’s Near-Infrared Absorbing Materials CWO™ can cut light of wavelengths between 850 and 1200nm which is the source of sunlight’s heat, and transmit light in the range of 400-850 nm, which is necessary for crop photosynthesis.

Ministry of Education, Culture, Sports, Science and Technology (MEXT),“Spectrum of action of plant photoreaction”
Created by processing above the graph.

Sumitomo Metal Mining offers dispersions that can be applied to PET films, fibers, and other materials. These are dispersed powders that can be kneaded into PVC, PP, and PET, which are used in agricultural house materials.
By kneading Near-Infrared Absorbing Materials CWO™ into the vinyl material of an agricultural house, we have realized an agricultural house that cuts only the light, which causes a rise in room temperature, while transmitting light necessary for photosynthesis of crops and light that can be recognized by the human eye.
In addition to the comfortable room temperature, crop yields have been increased, providing a comfortable environment for both crops and humans.

The ability of our Near-Infrared Absorbing Materials CWO™ such as to prevent the room temperature from rising in agricultural houses in mid-summer, making it applicable to other fields as well.

Do you try to realize your creations and ideas with our Near-Infrared Absorbing Materials CWO™?