How to extend the shelf life

First, the seam is too narrow. The greenhouse membrane is composed of a plurality of narrow-width membranes. When splicing, the bonding area must be increased to increase the bonding strength. If the patchwork is too narrow and the bonding area is small, cracks will be caused when the force is applied.

Second, press the film with a wire. After the large shed is covered with a film, it should be immediately pressed with a lamination line. Generally, one laminating line is pulled every 1 to 2 scaffolds. The tightness of the line should be appropriate. At the same time, a simple wind barrier must be set up on the windward side.

Third, the film should be promptly repaired after damage. The film is easily broken during use and storage, and temporary repair can be used during breakage. There are two ways to do this: First, the method of water supplementation. Scrub the damaged part with a clean cloth, cut a thin film with no holes that is bigger than the damaged part, put the water on the hole, and drain the film between the two membranes. Air, according to the level can be; Second, the paper method, the plastic film with mild damage after the paper dampened with water dampened at the damage, the same can be used for about 10 days.

Fourth, the damaged film after the shed is to be permanently repaired. The thicker film is broken, and it can be covered with a film of the same thickness and connected with a thin wire. You can also wash the damaged area, cover the hole with a slightly larger film, and then cover 2-3 layers of newspapers. Use an iron to gently press along the interface. The two films are heated and then affixed. After cooling, they will stick. Together, this method is called hot patching. In addition there are plastic repair method, wash the hole around the clean, with a special brush glue brush smear, after 3? 5 minutes, take a piece of film with the same quality on the top, dry glue can be firmly bonded. The heat-repairing method and the plastic patching method have good effects on the film, and the stitching method not only leaks air, but also easily pulls open, and it is better not to use the thin film that is not very thick.

Fifth, when the film is not used to dig pits buried. When the film is placed in the collection, it must be protected from exposure, smoke, and fire. Otherwise, its service life will be shortened. The best way to store shed film is to dig pits and bury them deeply. After the end of production, the removed film should be washed and dried first. After being rolled up, it should be wrapped in old film. Select a place where the dryness of the soil is moderate and dig a pit, and then The wrapped film is buried in the pit. Note that the upper layer of the film is more than 30 cm from the ground. This method can avoid the aging of the agricultural film in the air, brittle, and shorten the service life.

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