Wuhan Handern polyethylene multi-purpose shed film
DATE：2020/5/30 8:19:47 / READ： / SOURCE：This station
Wuhan Handern polyethylene multi-purpose shed film
(1) Preparation of greenhouses (greenhouses) There are many stereotyped plastic greenhouses in my country, such as solar greenhouses, high-efficiency and energy-saving solar greenhouses, ordinary greenhouses, and multi-span greenhouses. When constructing a greenhouse (greenhouse), you should try to choose a professionally designed superior structure greenhouse (greenhouse). A large-arc shed, a large high-span ratio, and a linear structure of a greenhouse (greenhouse) are not only conducive to exerting the characteristics of a multi-functional shed film, but also conducive to the cultivation of crops. The greenhouse should be inspected before covering the shed film . For example, the slats and bamboo parts in the greenhouse structure should be sterilized with non-oil-based disinfectants; the outer surfaces of the metal and wooden parts that contact the shed membrane should be smooth, or all the protruding parts should be tied with a strip of film Connecting parts; if the frame, supporting device and membrane shaking device are damaged, they should be replaced or repaired in time. www.handern.com Plastic building template
Greenhouses and multi-span greenhouses should be cleaned of gutters or repaired drainage pipes, inspected the structure of greenhouses (greenhouses), repaired or replaced unstable columns, beams, arches, etc. before buckling the sheds. www.handern.com Plastic building template
(2) Purchase of shed film Multi-function shed film is divided into single-layer multi-function shed film and multi-layer (two-layer or three-layer) co-extruded multi-function shed film due to different molding methods. When buying shed film, in addition to choosing a well-known brand, you should buy a shed film with high cost performance.
The light transmittance of the shed film is generally required to be above 85%. However, high light transmittance does not mean good transparency. Some shed films have lower transparency, but still have higher light transmittance, but their haze is larger. The high-haze shed film can make the sunlight entering the greenhouse (greenhouse) produce diffuse reflection, so that the greenhouse (greenhouse) can uniformly obtain light energy in all directions; the high-haze shed film is generally added The right amount of heat preservation agent has better preservation. However, if too much inorganic heat preservation agent is added, the haze of the shed film is too high and the mechanical properties are low, which is not a good shed film. www.handern.com Plastic building template
The thinning of the thickness of the shed film is beneficial to reduce the cost of building a greenhouse (greenhouse). However, if the thickness of the film is too thin, it will directly affect the performance and service life of the shed film, and cannot be lost due to small. According to the use period of the greenhouse (greenhouse), it is recommended to buy the following thickness of the shed film. www.handern.com Plastic building template
The effective use period is 8-12 months, the thickness of the optional shed film is 0.07-0.10m: the effective use period is 16-18 months, the thickness of the optional shed film is 0.08 ～ 0.12mm; the effective use period is 24-36 months, select The thickness of the shed film is 0.12-0.15mm.
Generally, the shed film used continuously for more than 3-4 years has a large loss of light transmittance, and after long-term use in the greenhouse, the soil needs to be disinfected and improved. At this time, even if the shed film is not damaged, the user should renew the film.
When purchasing a shed film, if the width of the shed is within 75m, the actual width of the shed film purchased should be increased by 1m: if the width of the shed is greater than 8m, the actual width of the shed film purchased should be increased by 1.5m; In the solar greenhouse, the actual width of the shed film purchased is 1.5m wider than the length of the front roof slope. The length of the shed film is generally increased by 2-5m compared to the length of the greenhouse (greenhouse). For the shed film of the shed skirt or curtain, the actual width of the shed film is 0.5-0.7m wider than the height of the skirt or curtain, and the length is the same as the actual length of the shed.
The functions of the inner and outer layers of the multi-layer co-extruded composite multi-functional shed film are different. For example, the layer with the function of dripping or mist reduction must face the soil. Therefore, before covering the shed film, you should carefully read the product manual provided by the manufacturer or the logo printed on the surface of the shed film. www.handern.com Plastic building template
(3) Covering of shed film It is best to choose shed film in the morning or evening, when the temperature is low and there is no strong wind. When covering the shed film, it should be evenly tightened in all directions to prevent horizontal wrinkles. If the temperature is high when covering the film, it should not be pulled too tight to prevent the temperature from falling or the standard film will return to the roofing film at night. Try to avoid the film from dragging the floor and the metal member of the scaffold to break the film . It is best to install the ceiling and curtains simultaneously.
(4) Use and storage of the phase film When using the shed film, if small cracks or holes are found in the shed film, it should be promptly repaired with transparent adhesive tape.
Unless there is a permissible label from the shed film manufacturer, excessive frequency of spraying wine with sulfur and halogen-containing pesticides, and the use of sulfur and acid smoke sterilization will accelerate the aging of the shed film and cause the shed film to break before the effective use period.
After the cultivation season, the shed film that can still be used should be cleaned, folded, and stored in a cool, clean place. The well should be protected from sun exposure and heavy pressure. It is ready for the next season. The shed film used in the second season, because the drip agent in the shed film will migrate, even if the front and back sides of the film are turned over and used, the dripping effect can be obtained. www.handern.com Plastic building template
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