Sound absorbing paper material and manufacturing method thereof

Abstract

The invention relates to a sound absorbing paper material and a manufacturing method thereof. The sound absorbing paper material comprises a sound absorbing paper base material which is formed by overlapping a main material and an auxiliary material, wherein the main material comprises a vegetable fiber, the auxiliary material comprises a cotton fiber and / or elastic nanometer cellulose and / or a functional polymer fiber, and the density and the thickness of the sound absorbing paper are 240-350kg / m<3> and 4-15mm respectively. The sound absorbing paper material of the invention is different from previous noise reduction materials. According to the manufacturing method of the invention, a cellulose fiber with high elasticity and a fiber with a hollow structure are mutually combined, a chemical nanometer modification method is adopted to modify the original structural form of the surface of the fiber to make sound waves move in nano-micron apertures between fibers and nano apertures in the fibers in a compression mode, so the conversion of the sound energy to the mechanical energy and the heat energy is realized. The sound absorbing paper material of the invention which has the advantages of flexible bending, light weight, small volume, low cost, good fireproof and self-extinguishing characteristic, and easy assembling has good application prospects and market competitiveness, and is especially suitable for being used for the noise reduction of variable frequency compressors.

Description

technical field [0001] The invention relates to a sound-absorbing material, in particular to a sound-absorbing paper material suitable for inverter air conditioner compressors and a manufacturing method thereof. Background technique [0002] The development of my country's refrigeration and air-conditioning industry started in the 1950s and 1960s. After more than half a century of development, there are currently more than a thousand manufacturing companies in the industry, and the number of employees has reached hundreds of thousands. Especially in the past five years, the average annual growth rate of the industry With a rate of 30%, a number of international brands have been formed. At present, the output of many products ranks first in the world. my country has developed into the world's second largest consumer market for refrigeration and air-conditioning equipment and the largest producer. The vital force of the equipment industry and an important part of the national ec...

AI Technical Summary

Problems solved by technology

For example, the Chinese Patent Document No. CN1311380 discloses a combined noise-reducing component with a depth of a rear cavity formed by a micro-perforated plate and a micro-perforated plate; although these materials have the effect of reducing noise in an ultra-wide frequency band, a large cavity structure and the entire structure are required. The material has rigid characteristics and is difficult to curl, which makes the whole material have defects such as narrow practical application area, bulky size, and high cost. It is complicated to install in the air conditioner and difficult to be widely used

For example, the fan muffler disclosed in Chinese Patent Document No. CN2361891Y is a fan muffler made of shell plate, porous plate, sound-absorbing cotton, glass fiber cloth, or mineral wool such as rubber skin and asbestos, which generally contain poisonous material and the sound absorption performance is not ideal, and because the whole material is rigid and the sound-absorbing cotton and glass wool used are toxic substances, it will cause serious pollution to the human environment and air pollution, so it is only used in fan noise reduction

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