Matters needing attention in the rational use of greenhouse film in structural design

Greenhouse film

The main function of greenhouse film is to control the temperature, light and humidity in the greenhouse, and to prevent the influence of the external environment. Therefore, when selecting greenhouse film, we should mainly consider the light transmittance, heat preservation and moisture retention and service life of greenhouse film.

1. Buckle film technology: PE three-layer composite weathering functional film and PVC non-drop weathering dustproof film can be divided into internal and external, so attention should be paid to buckling the film according to the internal and external direction specified by the manufacturer. The film buckling operation should be carried out at noon when there is no wind on a sunny day. When buckling the film, it should be flattened, taut and pressed firmly, so as not to produce wrinkles to affect the dripping effect. The longitudinal skeleton material can not be in contact with the film, and a special plastic laminating line should be used. In addition, the weathering functional film has a long useful life, so it is not suitable to use the upper and lower bamboo rod and iron wire to penetrate the film, but should be fixed by pressing film line.

2. Treatment of cracks, accumulated rain (snow) and dust: cracks in the use of the film should be repaired in time to avoid wind damage. Attention should be paid to scrubbing the weathering functional film during use. In order to protect the film, Rain Water pocket, snow should be removed in time.

3. The design of the shed structure: the anti-fog dripping film must be at a certain angle and without obstacles, so that the dew can flow smoothly along the film surface without dripping on the crops. The height-span ratio of the greenhouse and the solar greenhouse should be reasonably increased, the arch spacing should be appropriately reduced, and the cable should be kept at a certain distance from the film to ensure the smooth flow of the droplets.

4. The surface treatment of the skeleton material: the skeleton surface of the shed should be smooth. The steel skeleton should be treated with anti-rust.

5. Pesticide application technology: when using pesticides containing sulfur and iron, you should be careful not to spray on the surface, so as not to affect the service life.

6. treatment of the old film: the performance of the weathering functional film is poor after being covered continuously for one year, so it should be removed from the greenhouse and solar greenhouse to cover the small and medium-sized greenhouse. After covering a crop of shed, it can also be used to cover spinach and other overwintering vegetables on the ground. Waste greenhouse films that can no longer be used should be centrally handed over to waste purchasing stations or relevant enterprises for recycling so as to prevent white pollution.