YONCA PLASTİK

GREENHOUSE FILMS WITH ANTIFOG PROPERTY

Because of frequent watering and evaporation, greenhouses, moisturizing tunnels and covering films (mulch films) have a high content of vapour. When the moisture is over 100%, the vapour will condense on the plastic film which is cooler. Most of the polymetric materials like greenhouse films are not compatible with water and have low surface energy.

When the film contacts with condensed vapour, water droplets form on the film surface.

If vapour forms inside the greenhouse, the below problems will arise:

	The sunlight will reflect from the droplets and less light will pass from the fılm into the greenhouse which will negatively affect the plant growth.(Fig.l) Since the droplets will fall on the plants and flowers the diseases will increase. Big droplets will cause lens effect and it will cause burns on the plants. (Fig.2)
Fig 1

Antifog, additive will decrease and prevent this vapour. (Fig. 3). In time the antifog additive in the film will decrease. This time is 13-15 months and depends on the film thickness.
The antifog additives prevent vapor formation thus enable the entrance of light into the greenhouse. Researches made in Holland has shown that, a 1% decrease in light causes 1015% less yield in spring and 4-13% less yield in autumn for tomatoes. And 7-12% less yield in spring and 4-8% less yield in autumn for cucumber.

fig 2


fig 3

greenhouse films with IR Property greenhouse films with Antivirus Property