Sheets for Agriculture

Greenhouses

Cover Films for Growing Tunnels

Greenhouses and high tunnels are structures covered with a solar ray-transmitting film. The structure provides physical protection of the crops against winds, rain, snow and other natural hazards. It also enables interior climate control. The better the climate control inside the structure, and the better the conditions within, the better the quality of the resulting crop will be. Growing inside climate-controlled greenhouses enables production and a supply of vegetables year round – high quality vegetables at reduced use of pesticides.

Basic Properties of the Greenhouse Cover Films:

  • Good Mechanical Properties: the films’ mechanical properties are determined by the film composition and content. All AA Politiv films comply with the requirements of Israeli Standard 821 Part 2.
  • UV Resistance: polyethylene is damaged by the ultraviolet rays (250 to 400 nanometer wavelengths). This damage affects the mechanical properties, which are degraded until eventual failure to transmit light through the film. To prevent or minimize this damage, the right stabilizers need to be added. The types and concentration of stabilizers varies according to the lifetime expected from the film, geographic location and exposure to chemicals.
  • Proper Transmission of Visible Light: visible light is the spectrum required for plant photosynthesis to take place. Visible light transmission can be controlled and planned according to the requirements of the plants, the growing season and the growing location.
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Part number Films Description DurabilityTransmission of lightLight scatteringAFThermal additivesAnti-virusChemical resistanceColor
1537UVA transparenttwo years90%20%X50%X400Clear
1532UVA diffusertwo years85%65%X50%X400natural
1503UVA greenishtwo years86%55%X50%X400greenish
1544UVA diffusertwo years85%65%X50%X1500 natural
1738UVA transparenttwo years90%20%X50%X1500 Clear
1724UVA transparent antivirustwo years90%20%X50%X1500 Clear
1726IR transparenttwo years90%25%V80%X400Clear
1551IR transparenttwo years90%26%V50%V400Clear
1501IR Diffusertwo years85%60%V85%X400natural
1506IR greenish diffusertwo years85%50%V85%X400greenish
1785IR Diffusertwo years85%60%V85%X1500 natural
1843IR transparenttwo years90%25%V80%X1500 Clear
1727IR transparent antivirustwo years90%40%V80%VgoodClear
1601IR for tunnelsseason88%60%V70%XXClear
1603IR Diffuser for Tunnelsseason85%65%V70%VXClear
1609IR antivirus for tunnelsseason88%60%V70%XXClear
1610IR transparent to tunnelsseason93%50%V75%XXClear
1611IR for spray-resistant tunnelsseason88%60%V70%XmediumClear
1540UVA transparent with drip-driventwo years88%40%V50%XXClear
1522UVA diffuser with drip driventhree years86%67%V50%XXClear
1744UVA transparent with drip-driventwo years88%40%V50%XgoodClear
1590UVA thermal diffuser85%60%X75%XXClear
1569Transparent thermal UVA88%40%X75%XXClear
1596Thermal UVA is very transparent90%30%X75%XXClear
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