Non-woven fabrics, as a new type of covering and heat-insulating material, are used in the production of greenhouse vegetables and have achieved good economic benefits.
Insulation. Non-woven fabrics have lower transmittance for long-wave light than plastic films. Because the radiation of the nighttime radiation area is mainly due to long-wave radiation, the effect of covering heat preservation is prominent.
Breathable moisture. The non-woven fabrics are laid on each other by filaments in a mesh-like manner, which has a high void ratio, allows air permeability, water permeability, and automatic humidity adjustment.
Shading and cooling. Covered with non-woven fabrics, it has the function of shading and cooling. Different colors of non-woven shade, different cooling effect. The shading effect black is better than yellow and yellow is better than blue.
Anti-aging. Agricultural non-woven fabrics have undergone anti-aging treatment, and the lower the strength loss rate of fabrics, the lower the strength.
Through the practice of vegetable farmers, non-woven fabrics are mainly used in the production of greenhouse vegetables in the following aspects:
Used at the bottom of grasshoppers as a "secondary" insulation material. Many of the shanty sheds were covered not only with grasshoppers but also with a layer of non-woven fabric on the bottom of the sheds. According to the introduction of vegetable growers, by adding “secondary†insulation materials (non-woven fabrics), the insulation performance of the greenhouse can be significantly improved, which is 2°C-3°C higher than that of simply covering the straw, which is conducive to the growth of vegetables. In addition, the application of non-woven fabrics in the shade room where the shutter is used can also protect the grasshopper and extend its service life.
Used on the back wall of the greenhouse as a "slope protection" rainproof material. Sewing together the whole back wall with a plurality of non-woven fabrics, and fixing it with steel wire, can reduce the heat loss of the back wall; prevent rain, prevent snow, and protect the wall; it can cover weeding and reduce the damage of pests and diseases into the shed.
Other applications. Used in the production of watermelon covered in early spring in a multi-membrane, the non-woven fabric can be directly covered in a small shed in the arch shed, and the effect of heat insulation and cold prevention is prominent.
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