First, the seam is too narrow The greenhouse membrane is composed of a plurality of narrow membranes, and the bonding area is increased to increase the bonding strength. If the seam is too narrow and the bond area is small, it will cause a gap when pulled hard. Second, 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. Third, the film damage to repair The film is easily damaged during use and storage. The damage can be repaired temporarily by using temporary repair methods. There are three methods: First, the water is used to clean the damaged part, and a thin film with a larger hole than the damaged part is cut. The water is placed on the hole and the air between the two membranes is drained. 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 flour, brown sugar, slightly after heating can be used to make up the film. After the shed is removed, permanent repair is used for the film, and the thicker film is damaged. The film can be covered with a film with 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 gel-replenishing method have good effect on the film, and the sewing method not only leaks air, but also easily pulls open, and it is better not to use thicker film for texture. IV. Digging pits when it is disabled 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 air-dried first, wrapped in old membranes, dug a pit in a place where the dryness and humidity of the soil are moderate, and then put the wrapped membranes in the pits for burying. The distance from the upper layer of the film to the ground should be more than 30 cm. This method can avoid the agricultural film stored in the air due to aging brittle, and shorten the service life. 3Ply Face Masks,3 Ply Surgical Mask,3Ply Nonwoven Face Mask,3Ply Disposable Face Mask Jiangyin Huashi Medical Equipment Co.,Ltd , https://www.medicalwellcare.com