1.What effect does coating type have on lighting?
Transparent PE: Visible light transmittance 85%~90%, mainly direct light, easy to burn crops, strong light resistant crops (such as tomatoes).
Milky white SMP: Visible light transmittance 40%~60%, softening scattered light, evenly distributed, suitable for leafy vegetables (lettuce, spinach).
Aluminum-based reflective: Visible light transmittance <20%, reflects infrared rays, reduces heat radiation, high temperature areas (anti-sunburn)
2.How to choose coating?
Red light enhancement type: add fluorescent agent to convert ultraviolet light into red light (600-700nm), promote flowering and fruiting (strawberry, Solanaceae crops);
Blue light blocking type: filter blue light below 450nm to inhibit excessive growth (suitable for seedling sheds).
3.How about intelligent temperature and light collaborative technology?
Photothermal responsive coating: When the temperature is greater than 30°C, the microcapsule phase change material (PCM) melts and scatters light → the transmittance automatically drops to 40%; ◦ When the temperature is less than 15°C, it returns to a high transmittance state.
Photovoltaic integrated greenhouse ◦ The color-coated panels on the roof integrate cadmium telluride thin-film batteries (transmittance 30%), generating electricity while regulating light intensity
4.What are the precautions for use?
Regional climate adaptation
Alpine regions: choose dark coating + double-layer board heat storage (increase night temperature by 3-5℃);
High humidity tropical region: light-colored high-reflective coating + wave peak ventilation design (humidity ↓15%).
Cleaning and maintenance
Rinse with neutral detergent every month to maintain light transmittance attenuation <5%/year;
Avoid hard objects from scratching and damaging the light-regulating coating.
5.Why is galvanized color-coated steel sheet an ideal carrier for agricultural temperature and light management?
Lighting: Through the coating transmission/scattering design, the PAR utilization rate can reach 1.8 times that of traditional film greenhouses;
Temperature: With the help of SRR regulation and structural insulation, the temperature can be reduced by 12℃ in summer and the temperature difference at night in winter can be reduced by 40%;
Economical: Although the initial cost is 6-8 times that of PE film, the cost during the life cycle is only 1/3 of that of a glass greenhouse.