Patchwork is too narrow. The greenhouse film is composed of a plurality of narrow film splicing, and the bonding area is increased during the splicing to increase the bonding strength. If the seam is too narrow and the bonding area is small, it will cause a seam when pulled hard. Press the film with thread. After the large shed is covered with a film, it should be immediately pressed with a lamination line. In general, every 1 to 2 scaffolds pull a laminating line, and the elasticity of the line should be moderate. At the same time, a simple windbreak is set up on the windward side. Otherwise, the thin and light film of the greenhouse can easily be blown under the strong winds of the winter and even be blown up by strong winds. Damage to the film should be repaired. The film is easily damaged during use and storage, and temporary repair can be used during use. There are three methods. The first is the method of water supplementation. Scrub the damaged area and cut a thin film with no hole that is slightly larger than the broken place. Put the water on the hole and drain the air between the two films. The second is the paper-making method. The agricultural film is slightly damaged. After the paper is dampened, the dampness is attached to the damaged part. Generally, it can be used for about 10 days. The third is the paste method, using white flour to add water to make a paste, and then add the equivalent of 1/3 of the dry weight of red wolfberry, slightly heated to fill the membrane. After the shed is removed, permanent repair must be used. The thicker film is damaged and can be covered with a film of the same texture and connected with a thin line. Can also be washed at the damage, with a slightly larger film to cover the hole, and then covered with 2 to 3 layers of newspapers, with an iron gently ironing along the interface, the two films were heated paste, after cooling will stick to Together, this method is called hot patching. In addition, there is a plastic repair method. Clean the hole around the hole and apply it with a special brush. After 3 to 5 minutes, take a piece of film with the same texture and stick it on it. After the glue is dry, it can be fastened. The heat-replenishing method and the plastic patching method are effective, but the stitching method is not only leaky, but also easy to open, and it is better not to use a thicker film. Dig pits when it is out of service. During the collection period, the film must be protected from exposure, smoke, and fire. Otherwise, its service life is greatly shortened. Practice has proved that the best storage method for greenhouse films is digging and burying. After the production of greenhouses is completed, the removed membranes should be washed and dried first, covered or rolled up, wrapped in old membranes, selected in a place where the dryness and humidity of the soil are moderate to dig a pit, and then the wrapped membranes should be buried in the pits. Note that the upper layer of the film should be more than 30 cm from the ground. This method can avoid the agricultural film stored in the air due to aging brittle, and shorten the service life. Adult Non-Woven Fabrics Cover,Bacteria Protection Face Mask,3-layer Filter Protective Face Mask, Dongguan Keyutai Mask Co., Ltd. , https://www.maskkytai.com