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中文简体In the field of sound insulation materials, three-dimensional molded sound insulation felt stands out among many sound insulation products with its excellent sound insulation performance and unique molding effect, and is widely used in many fields such as construction, transportation, and industry. In its production process, the three-dimensional molded sound insulation felt production line undertakes the key mission of transforming raw materials into high-quality products. Among them, the main raw materials - polymers, metal powders and various additives, are like the cornerstones of this transformation journey. Their quality and characteristics play a decisive role in the quality of the final product, and profoundly affect the overall performance and output results of the three-dimensional molded sound insulation felt production line.
As the basic raw material of three-dimensional molded sound insulation felt, polymers give the product indispensable flexibility and certain strength. In the initial raw material mixing stage of the production line, polymers, with their long-chain molecular structure, when mixed with other raw materials, are like building a molecular bridge to closely connect various components. In the subsequent mixing stage, under high temperature and high pressure environment, the molecular chains of polymers are rearranged and entangled, further strengthening the binding force with metal powders and additives. This combination not only determines the plasticity of the sound insulation felt during the molding process, so that it can be smoothly molded into the desired shape in the mold, but also ensures the physical stability of the sound insulation felt during the use of the product. For example, in the application scenario of building sound insulation, facing the complex wall structure and installation environment, the sound insulation felt with good flexibility can better fit the wall surface and adapt to different installation angles and surface undulations. Its certain strength ensures that it will not be easily broken or damaged due to daily slight vibrations, temperature changes and other factors during long-term use, effectively extending the service life of the product, thereby improving the practicality and market competitiveness of the products produced by the entire three-dimensional molding sound insulation felt production line.
Metal powder plays a core role in improving the sound insulation performance in the production of three-dimensional molding sound insulation felt. The propagation of sound is essentially a transfer of energy, and metal powder can effectively block the propagation path of sound energy due to its special physical properties. On the production line, starting from the mixing of raw materials, the metal powder is evenly dispersed in the polymer matrix. In subsequent processing, such as the plasticization stage of the single-screw extruder, the metal powder is further evenly distributed to form countless tiny barrier units. When sound waves come into contact with the three-dimensional molded sound insulation felt, the metal powder can convert sound energy into other forms of energy such as heat energy, thereby greatly weakening the transmission intensity of the sound. Metal powders of different types and particle sizes have different sound barrier effects. For example, metal powders with smaller particle sizes have a larger specific surface area under the same volume, can contact and combine more fully with high molecular polymers, and form a denser barrier network per unit area, so that the barrier effect on high-frequency sound is more significant; while metal powders with larger particle sizes perform better in blocking low-frequency sound. This precise selection and application of metal powder characteristics according to different application scenarios enables the three-dimensional molded sound insulation felt production line to produce products that meet diverse sound insulation needs, greatly expanding the application range of the product.
Various types of additives also play an important role in the production process of three-dimensional molded sound insulation felt. There are many types of additives with different functions, covering many aspects such as improving processing performance and enhancing product comprehensive performance. Taking flame retardant additives as an example, in modern construction, transportation and other fields, there are strict requirements on the fire safety performance of materials. Adding flame retardant additives to the three-dimensional molded sound insulation felt production line can significantly improve the flame retardant properties of the sound insulation felt without affecting other properties of the product. During the production process, the flame retardant additives are fully mixed with raw materials such as high molecular polymers. Under high-temperature processing conditions, a dense flame retardant protective film is formed on the surface of the product through a series of complex chemical reactions. When encountering a fire, this protective film can effectively prevent the spread of flames, reduce the burning rate of the product, and buy precious time for personnel evacuation and fire fighting. In addition, the addition of anti-aging additives can enhance the ability of the sound insulation felt to resist erosion by natural environmental factors (such as ultraviolet rays, temperature changes, humidity, etc.). When used outdoors for a long time or in harsh environments, anti-aging additives can inhibit the oxidative degradation process of high molecular polymers, slow down the decay rate of product performance, maintain the flexibility, strength and long-term stability of the sound insulation felt's sound insulation performance, and ensure that the products produced by the three-dimensional molded sound insulation felt production line can continue to perform their due functions in various complex use environments.
