These films combine common features like firmness and long lifetime with optional features such as: thermal effect, anti-dripping effect, anti-fogging effect, disease limitation effect and useful properties that have transformed the film to an active contributor to plant protection, growth and productivity
By using our experience, careful selection of raw materials and high strength polymers, processing conditions and quality control procedures we provide our films with excellent mechanical strength.
We increased resistance of our films against degradation and pesticides by using UV stabilizers.
These UV stabilizers have some advantages in greenhouse such as:
Also, by using another additive (EVA) we could gain some film features like:
EVA stands for ethylene vinyl acetate. It’s a copolymer resin. The resin together with a number of ingredients is heated and mixed thoroughly and then is extruded thorough a flat die. EVA film is then formed. EVA film is available with clear white and many different colors. It contains no plasticizer and is always packed in roll form. The outstanding adhesive EVA film is non- sticky and its surface is smooth.
In manufacturing our films, we have combined UV stabilizers with antioxidants with a special formula for long term stabilization. Because making this formula gives an extremely high efficacy in retarding UV light and thermal degradation. UV light stabilizers function as radical scavengers and are capable of scavenging the detrimental
Light is an essential element for plant growth, so greenhouse films should guarantee the maximum transmission of light to the plant. The experience in manufacturing, the quality of equipment and the selection of suitable raw materials make plastic films safe in terms of maximum transmission of light.
In many places, a clear colorless transparent coating (like glass) transmits the highest amount of light. But if the film is made in a controlled way in the form of a cloud, the total amount of passing light will not be significantly reduced and will also be profitable in the amount of light reached. This is due to the fact that the diffused light reaches the plant from the different direction and is spread more uniformly around the plant. In this way, the top parts of the plants cannot be squeezed, and the lower parts also easily benefit from the sunlight. SHIMI PLASTIC is skillful in film production with various grades of light diffusion according to the needs of customers.
By using EVA and infrared radiation additives in a three-layer thermal film, we have helped the slower cooling in the greenhouse at night. These additives absorb infrared radiation and, by preventing the heat loss that is collected during the day, compensates for the lack of heat throughout the night. Avoid wasting heat prevents the plant from being frozen in the event of a sudden drop in temperature.it causes More productivity, more product quality and faster harvest. It saves fuel costs for heating the greenhouse, while keeping the average temperature between 1/5 and 3 degrees Celsius.
Some plants, such as ornamental flowers of shade trees and tropical plants require less heat during the day. To do this, we have produced special films that absorb or reflect infrared rays. This radiation has the highest amount of heat in the sun and does not affect plant growth. The higher the outside temperature when using these films, the more is the heat difference between the inside and outside of the greenhouse.
Transpiration occurs in the plants and land because of high temperature difference between the interior and exterior of greenhouses and water drops are formed on the inner surface of greenhouse cover. These water drops cause the plant diseases for falling down on the plant and so preventing 15 – ۳۰ percent of the sunlight to reach the greenhouse and rest of the sun lights entering into greenhouse cause burning of the plants and some disease because the water drops act as a lens.
Anti-dripping additives prevent humidity in the greenhouse to remain on the inner surface of the film as sizeable water drops but forms instead a very transparent thin layer of water (running down the sides of films), increase high transmission highly. The weight of this layer is very less than drops. So the drops not remaining on the surface cause fog in the greenhouse. For solving this problem we produced anti-dripping films with the virtue of anti-fogging that prevent or reduce the mists. But these films act more effectively when ventilation is made by opening the sides of greenhouse or by using fans every day at dawn and sunset. Fog not evacuated from the greenhouse for a long time may stick on the plant and fruits and cause disease.
A range of Shimi Plastic products have a good transaction in facing with the plant diseases. Some of them contain antivirus additive which with its special optic structure absorbs UV radiation up to 390 nm and reduces the vision of the pets like whiteflies, plant louses, miners, etc. and helps prevention of fungal disease and viruses. Because some fungal infections (especially botrytis) can be influenced by the UV, as the production of spores can be triggered by the UV. Antivirus additive ensures high productivity and quality and helps reduce the use of pesticides. Moreover, using these anti pest / virus films prevents rose’s petals to blacken thereby increase their commercial value. But these greenhouse films should not be used in greenhouses where bumblebee’s pollination is applied.
It should be mentioned that other parameters like temperature and humidity enhance the development of diseases so the plastic film is not able to control the diseases lonely but it can contribute to their limitation when used along with other suitable methods
The farmers can change the growth behavior of the plants and increase productivity, promote or retard the growth and cause elongation dwarfing of the stems. They can make their plants growth as desire by using a range of Shimi Plastic special photo selective films containing special additives and pigments to modify and manage the sunlight spectrum entering into greenhouse.
