What new plastic films are there now?

At present, covering with plastic film is an essential work for some vegetables and fruits during planting and production. Reasonable plastic film mulching can effectively improve the yield and quality of crops. At present, the main mulching films are polyethylene mulching film and PVC mulching film. In fact, in addition to these two kinds of plastic films, there are many new plastic films. So what are the specific ones? Let me give you a brief introduction. Let's have a look!

1, biodegradable plastic film

The first is biodegradable plastic film. Biodegradable plastic mulch film can provide functions for microorganisms in the soil in the natural environment, and it is a directly degradable plastic basement film. After the microorganism erodes the plastic film, the polymer components will be hydrolyzed, ionized or protonated and split into oligomers due to the increase of the number of cells. Enzymes secreted by fungi and bacteria can decompose water-soluble polymers, then produce small molecular compounds, and finally decompose into oxygen and carbon dioxide. Its main raw materials are biodegradable masterbatch and plastic particle masterbatch.

2. Photodegradable plastic film

As the name implies, photodegradable mulch film is a kind of mulch film made of photodegradable particles as the main raw material. Mainly through the irradiation and degradation of light, the plastic film is broken and decomposed into small molecular organic matter and carbon dioxide. By controlling photocatalyst, the degradation time of plastic film can be effectively controlled within one year, thus meeting the requirements of various crops for covering time. It can not only ensure the growth of crops, but also do no harm to the environment. It is a plastic film with great environmental protection value.

3. Permeable plastic film

Plastic film is now mainly used in arid and semi-arid areas. Permeable plastic film can make water effectively penetrate into the bottom of soil, which has many advantages such as water seepage, water retention, temperature and humidity adjustment, and strong durability. Compared with ordinary plastic film, permeable plastic film can make full use of rainwater and effectively improve the utilization rate of rainwater. It can also improve the utilization rate of fertilizer on the surface of soil, promote the growth of crop roots and enhance the growth ability of crops, thus achieving the purpose of increasing production and effectively saving water resources for semi-arid areas.

4. Black plastic film

Black plastic film literally means that the color of plastic film is black. The transmittance of black mulch film is less than 3%, and the transmittance of transparent mulch film we commonly use is generally around 40. Therefore, the thermal radiation of black plastic film is much smaller than that of transparent plastic film, generally only about 35%, while the maximum value of transparent plastic film is 90%. Because it can be opaque to light, weeds can hardly grow, so the weeding performance is very strong. Although the black plastic film is not strong in warming ability, it can be used to weed and cool down in summer, which is very suitable for softening cultivation of some vegetables.

Then briefly introduce what new plastic films are available now. At present, there are many kinds of plastic films. Selection should be made according to the growth habit, region, climate and other factors to ensure the normal growth of crops. Let's call it a day. This article is for reference only. I hope I can help you!

Some professional knowledge is transferred from the network.