Common Types of Agricultural Plastic Film and a Guide to Selection and Application

In modern agricultural production, plastic film is a very common agricultural material. The emergence of plastic film has brought great convenience to farmers in agricultural production, but there are also many types of plastic film, and their uses differ. So what are the common types of agricultural plastic film? How should they be selected and applied?

1. Common types of agricultural plastic film

1. Anti-seepage film

Anti-seepage film is also called waterproof film in many regions. It has good heat resistance and cold resistance, and advantages such as toughness, high strength, and good elongation performance. It is often used in anti-seepage projects, such as artificial lakes, landfill sites, and tailings treatment stations.

2. Geomembrane

It is a polymer chemical flexible material with advantages such as corrosion resistance, low temperature resistance, and good frost resistance. It is often used in landfill sites, sewage or waste residue treatment sites, river embankments, lake dams, tailings dams, sewage dams, and anti-seepage in reservoir areas.

3. Greenhouse film

Greenhouse film generally refers to plastic film for plastic tunnels and greenhouse plastic agricultural film. Covering with greenhouse film can provide crops with a good climate environment for temperature, humidity, and light quality, effectively prevent and control pests and diseases and reduce the impact of natural disasters, and improve crop yield and quality.

4. PO film

It has good transparency, low haze, and high transparency, with super tensile strength and tear resistance. It is mainly used as the outer covering film of greenhouses.

5. Black plastic mulch

It has low light transmittance and can effectively prevent the evaporation of moisture in the soil and inhibit the growth of weeds. For plots with severe weeds or for cultivating summer radish, cabbage, autumn cucumber, and late tomato in high-temperature seasons, black agricultural film has the best effect.

6. White plastic mulch

White plastic mulch is also called ordinary plastic mulch. Its light transmittance reaches 90%. It is widely used for warming and storing water and preserving soil moisture in spring. In addition, it has a certain effect on improving soil microbial activity, soil organic matter content, and improving soil.

2. How should plastic film be selected and applied?

1. Greenhouse plastic film

Plastic film has heat preservation properties. After covering with film, the turbidity inside the greenhouse will rise as the outside temperature rises and fall as the outside temperature drops. There are also obvious seasonal changes and a relatively large diurnal temperature difference. Therefore, the main production seasons for greenhouses are spring, summer, and autumn. Through heat preservation and ventilation cooling, the greenhouse temperature can be maintained at the suitable growth temperature of 15-30 degrees C. It should be determined according to the planted product; it is not that the thicker the plastic film, the better, and the specific material still needs to be considered. Generally, film easily absorbs water vapor, which condenses into water droplets on the film. During use, due to high temperature, low temperature, and the effect of solar ultraviolet rays, the film "ages." After the film ages, its light transmittance decreases and it may even lose its use value. Therefore, for plastic film covering greenhouses, temperature-resistant and anti-aging film should be selected, so as to enhance light reception and warming inside the greenhouse and extend the service life of the plastic film.

2. Thermoformed film

Used for door panels and mobile phones; the thinner the better, because general film is mainly directly covered on the surface of the board with glue at normal temperature and normal pressure. This operation is relatively fast, but after one or two years, the film is likely to fall off. PVC film is different. It is applied to the surface of the board under high temperature using a special vacuum laminating machine, so it is not easy to fall off. PVC is completely non-toxic and odorless, with no irritation to human skin or the respiratory system. For people allergic to wood and paint, furniture or kitchenware packaged with PVC film is very suitable.

3. Cling film

There are no special requirements for the thickness of cling film, but when choosing cling film, caution is needed. Some materials of cling film will produce harmful substances when heated too much, causing certain harm to the human body.

4. Aluminized plastic film

It is mainly used for sealing inner packaging of medicine, food, and so on. There are strict requirements for thickness, and certain pharmaceutical packaging certification and food certification are required to ensure the safety and hygiene of packaged products.

The above is an introduction to plastic film. Plastic film has a wide range of uses, and the choice of thickness needs to be targeted according to the current use of each product. In recent years, with changes in the needs of agricultural and animal husbandry production and the continuous progress of science and technology, the requirements for plastic film have also become higher and higher.

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