There are many kinds of greenhouse films, and different greenhouse films have different functions. In addition, the thickness of the greenhouse film has a great relationship with the growth of crops. The greenhouse film is a plastic product. In summer, the greenhouse film is exposed to the sun for a long time, and it is easy to age and become brittle, which is also related to the thickness of the greenhouse film. If the greenhouse film is too thick, it will cause an aging phenomenon, and if the greenhouse film is too thin, it will not be able to play a good role in temperature control. Furthermore, the thickness of the greenhouse film is also related to the type of crops, flowers, etc. We need to choose different greenhouse films according to their growth habits.
How many types of greenhouse films? Greenhouse films are commonly divided into PO greenhouse film, PE greenhouse film, EVA greenhouse film, and so on according to the material.
PO greenhouse film: PO film refers to the agricultural film made of polyolefin as the main raw material. It has high tensile strength, good thermal insulation performance, and can well protect the growth of crops. Tensile strength means that the agricultural film needs to be pulled tightly when covering. If the tensile strength is not good, it is easy to be torn, or even if it is not torn at that time, the occasional strong wind will cause damage to the PO agricultural film. Good thermal insulation is the most basic requirement for crops. The temperature and humidity control inside the agricultural film is different from the environment outside the greenhouse film. Therefore, PO agricultural film has a good temperature and humidity control effect, which is very helpful to the growth of crops and is deeply loved by people.
PE greenhouse film: PE film is a kind of polyethylene agricultural film, and PE is the abbreviation of polyethylene. Polyethylene is a kind of plastic, and the plastic bag we use is a kind of PE plastic product. Polyethylene has excellent chemical stability. Polyethylene is easy to be photo-oxidized, thermally oxidized, and ozone decomposed, and it is easy to degrade under the action of ultraviolet rays. Carbon black has an excellent light-shielding effect on polyethylene.
EVA greenhouse film: EVA film refers to the agricultural film product with ethylene-vinyl acetate copolymer as the main material. The characteristics of EVA agricultural film are good water resistance, good corrosion resistance, and high heat preservation.
Water resistance: non-absorbent, moisture-proof, good water resistance.
Corrosion resistance: resistant to seawater, oil, acid, alkali, and other chemical corrosion, antibacterial, non-toxic, tasteless, and pollution-free.
Thermal insulation: heat insulation, excellent thermal insulation, cold protection, and low-temperature performance, and can withstand severe cold and sun exposure.
How to choose the thickness of the greenhouse film? The thickness of the greenhouse film has a great relationship with the light transmittance and also has a great relationship with the effective service life.
Effective use period: 16-18 months, the thickness of 0.08-0.10 mm is workable.
Effective use period: 24-60 months, the thickness of 0.12-0.15 mm is workable.
The thickness of the agriculture film used in multi-span greenhouses needs to be more than 0.15 mm.
Post time: Jan-09-2023