Multi-layered broadband sound absorption and insulation material and preparation method thereof

Abstract

The invention relates to a multi-layered broadband sound absorption and insulation material and a preparation method thereof. The multi-layered broadband sound absorption and insulation material is composed of seven layers of structures which include a non-woven fabric layer, a hard porous foam layer, a plastic thin film layer, a hollow glass bead layer, a nanofiber film layer, a soft porous foamlayer and a knitted fabric layer from top to bottom; the non-woven fabric layer is the non-woven fabric layer formed through heat bonding of glass short fiber and PU fiber, and the non-woven fabric layer is the base cloth of the sound insulation material; the hard porous foam layer and the soft porous foam layer are all sound absorption layers made of polyester foam boards; and the hollow glass bead layer is an air layer structure formed through scattering of hollow glass beads between the plastic thin film layer and the nanofiber film layer. The multi-layered broadband sound absorption and insulation material achieves the high-efficiency and broadband sound absorption and insulation effect by adopting the different sound absorption and insulation principles, and effectively solves the problem of noise in cars. The multi-layered broadband sound absorption and insulation material serves as an automobile interior decoration material, is formed through multi-layered pressing, and the processing technology is simple. The thickness is only 1-1.5 cm, the multi-layered broadband sound absorption and insulation material is light, attractive and practical, clean and environmentally friendly, easy to mount and operate, and can effectively improve the comfort of the environment in the cars.

Description

technical field [0001] The invention relates to the technical field of sound-absorbing and sound-insulating materials, in particular to a multi-layer broadband sound-absorbing and sound-insulating material and a preparation method thereof. Background technique [0002] Noise pollution has become the third largest pollution after the atmosphere and the environment, especially living in a noisy urban environment and facing all kinds of noise all day long, which greatly affects the physical and mental health of the human body and affects people's quality of life ; With the gradual improvement of the urban transportation network, people travel more by using various means of transportation, such as: cars, airplanes, trains, subways, buses, etc.; but the use of these means of transportation will inevitably bring All kinds of noise affect the ride comfort. Along with the raising of people's living standard, automobile has become a kind of common means of transportation, and its po...

AI Technical Summary

Problems solved by technology

Compared with traditional sound-absorbing materials, the prepared vehicle sound-insulating pad has slightly improved sound-absorbing performance and good heat-insulating performance, but it cannot achieve better sound-absorbing and sound-insulating effects for higher and lower frequency noises. And the whole material is relatively hard, the surface is rough, and it does not have good comfort

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