Novel sound absorbing and insulating and heat insulating material and application thereof

Abstract

The invention discloses a novel sound absorbing and insulating and heat insulating material which can be formed by sound absorbing and insulating cotton felt and can be also compounded by the sound absorbing and insulating cotton felt and an elastic sponge body through damp compound viscose. The sound absorbing and insulating cotton felt is made of interposition aramid fiber 1313; the elastic sponge body is a silicon rubber sheet with the thickness of 0.2-0.3 mm; and the hydrophobic property of the sound absorbing and insulating and heat insulating material is 95 percent. The novel sound absorbing and insulating and heat insulating material is environment friendly and incombustible, has no pollution, long using time and good hydrophobic property, can resist high temperature and can be used as the sound absorbing and insulating and heat insulating material for aerospace vehicles and various vehicle wall plates and acoustic decoration material for halls and stadiums.

Description

technical field [0001] The invention relates to a novel aramid fiber sound-absorbing and heat-insulating material, in particular to a novel sound-absorbing and heat-insulating material and its application. Background technique [0002] With the establishment of many major projects in my country's aviation field, such as new branch lines, large transport aircraft, and large passenger aircraft, my country's research on aviation materials has also ushered in a rare opportunity for development. However, at present, my country's aviation materials research and manufacturing capabilities not only have a certain gap compared with developed countries, but also have a large gap with the demand for these new models. As far as aviation sound-absorbing and sound-insulating materials are concerned, whether it is the MA series aircraft, the new regional ARJ21 series aircraft, or the future large transport aircraft, large passenger aircraft, and even helicopters such as Z-8 and Z-11, a con...

AI Technical Summary

Problems solved by technology

However, due to the shortcomings of nylon fiber itself, such as low elastic modulus, high water absorption, low low-temperature impact strength, and deformation after water absorption, the use of this high-performance composite membrane for aviation has been limited to a certain extent.

[0008] Therefore, the existing sound-absorbing and insulating materials cannot meet the acoustic requirements of aviation and other special fields. To carry out the development and application research of new sound-absorbing and sound-insulating materials, to develop domestically advanced sound-absorbing and sound-insulating materials, and to improve the development and production capacity of new sound-absorbing and sound-insulating materials in China. It is of great significance to realize the localization of sound-absorbing and sound-insulating materials for large aircraft

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