Nanofiber composite sound insulation material

Abstract

The invention discloses a nanofiber composite sound insulation material, comprising a noise elimination layer, a composite sound insulation layer and a sound absorbing layer, which are superposed together, wherein the composite sound insulation layer is located in the middle and is composed of a first single sound insulation layer and a second single sound insulation layer which are superposed together and are of the same structure, and each of the first and second single sound insulation layers comprises a composite fiber layer and a nano fiber layer. The composite sound insulation layer hasan absorption coefficient of more than 0.3 for a 500 Hz sound source, and an absorption coefficient of 0.6 or more for a 1000 Hz sound source, and the sound absorbing performance is good; and the material is provided with the noise elimination layer and the sound absorbing layer, when entering the noise elimination layer, sound waves have friction with the walls of countless holes communicating with each other, and sound energy is converted into heat energy to consume, thereby achieving noise eliminating effect. The structure of the sound absorbing layer allows the contact area between the sound absorbing layer and the sound waves to increase, thereby achieving better sound absorbing effect.

Description

technical field [0001] The invention relates to the technical field of nanometer materials, in particular to a nanofiber composite sound insulation material. Background technique [0002] Noise pollution has become a contemporary global environmental problem, and it is listed as the world's four major pollutions together with air pollution, water pollution and solid waste pollution. With the development of economy and technology, agriculture and industry are becoming more and more mechanized, and the transportation industry is also becoming more and more developed. However, at the same time, noise pollution is becoming more and more serious. People's demand for sound-absorbing and sound-insulating materials is increasing, and their performance requirements are also getting higher and higher, especially in the fields of construction and automobiles, the market for sound-absorbing and sound-insulating materials continues to grow. The main functions of automotive sound insulat...

AI Technical Summary

Problems solved by technology

Traditional sound-absorbing and sound-insulating materials are mostly micron-sized hot-melt fibers, mineral fibers, and foam plastics, etc., with large holes, which are not conducive to the absorption of low-frequency noise by sound-absorbing and sound-insulating materials, which limits the promotion and use of related sound-insulating products.

Images