To do a good job in the storage of nets and the repair of nets, we must first understand the physical and chemical properties of the net materials. For example, nylon, nylon, polyester, vinyl, polypropylene, chlorin, and vinyl chloride are chemically synthesized. Compounds of molecular weight are polymerized into macromolecular compounds, which are then melted, spun, and drawn to produce synthetic fibers with good physical and mechanical properties. The fishing nets made of these synthetic fibers have characteristics such as small specific gravity, fast filtration, high strength, and lightness of the net, but synthetic fibers have the disadvantage of poor resistance to solar light. Exposure to sunlight for a long time can result in a corresponding decrease in fiber strength. According to the test, after the general vinyl fiber had experienced 625 hours of exposure to sunlight, the strength decreased by 20%. After 900 hours of exposure to the sun, the strength of the nylon fiber decreased by more than 40%. Such as cotton, hemp, brown and other plant fiber fishing nets have low strength, high water absorption, perishable and other shortcomings. Therefore, the correct storage method should be adopted according to the characteristics of various networks. Before the fishing nets are stored, the attachments such as sludge, fishy and the like on the fishing nets should be washed and dried, and the sinkers should be removed and stored separately to prevent the iron sinkers from rusting and damaging the net clothes. Storage places should be kept in air circulation without direct sunlight. For small and small fishing nets, they can be tied and suspended on roof beams. For large and bulky fishing nets, they can be stored on high foundations with good ventilation conditions. Warehouse. The fishing nets should not be placed directly on the ground. They should be bundled on a wooden stand 0.5 meters above the ground or in a large wooden box. However, the nets dyed with tung oil are not suitable for tying up rolls, and should be placed on a high grid to prevent spontaneous combustion. Storage period must be checked. When the weather is clear and the air is dry, the window of the garage door must be opened to allow the air to circulate. When the weather is cloudy or the air humidity is high, the warehouse needs to be closed. In each rainy or hot summer season, special attention should be paid to the emergence of mildew in the nets and cords made of plant fibers, which should be regularly exposed to sunlight for drying. Fishing nets should not be mixed with volatile or corrosive materials such as chemical fertilizers, pesticides and diesel oil. At the same time pay attention to insecticide and rodent control. During the storage period or fishing process, the damaged net clothing should be promptly repaired. The patching method is generally two kinds of patching method and embedding method. The patching method is the main method of repairing the mesh. Compilation is made on the three feet above the hole (three feet connected with the nodule). The missing mesh is the same as that of the mesh, and the three feet below the hole are terminated. Before the repair, the holes should be trimmed so that there are three legs on the upper and lower sides of the hole, and the rest are straight (side) and horizontal (wink) shaped patches, also called single line patching, not trimmed. The method called the heavy line patching method. The embedding method is to trim the hole into squares or rectangles, cut a piece of the same size as the original net clothing, and insert a mesh net for the long and wide sides of the hole. Use the sew method to attach the four sides to the hole. Stitching the edges together, in the case of a large hole, the use of the compensation method takes too much time, generally inching method can be used.
Makeup Machines,Tattoo Permanent Machines,Permanent Makeup Machines
Novelty Hardware Manufacturer , http://www.ywtattooneedles.com