Improved acoustic material

A sound-absorbing material and an improved technology, applied in the field of electro-acoustic products, can solve the problems of sound-absorbing particles such as power-on failure, achieve the effect of large surface energy, solve failure, and enhance bond strength

Active Publication Date: 2017-12-22
苏州夸克新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention is aimed at the deficiencies of the prior art, one of the purposes is to provide an improved sound-absorbing material; the second purpose is to provide a method fo

Method used

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  • Improved acoustic material

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Effect test

Embodiment 1

[0026] Embodiment 1, see attached figure 1 , an improved sound-absorbing material, including zeolite particles 1, adhesive 2 and nano-metal oxide 3, zeolite particles, adhesives and nano-metal oxides are mixed and granulated to form sound-absorbing particles; zeolite particles are pure SiO 2 Modified, when the speaker diaphragm vibrates up and down, the zeolite particles can absorb and desorb the gas in the inner cavity, increase the acoustic compliance of the air in the rear cavity, reduce the resonance frequency of the enclosed space, and improve the low-frequency performance. In this embodiment, There are uniform micropores in the zeolite particles, and the micropores absorb and desorb air molecules under the action of sound pressure, which can increase the volume of the virtual acoustic cavity.

[0027] The nano metal oxide is one or more of aluminum oxide, copper oxide, iron oxide, zinc oxide, zirconium oxide or nickel oxide. In this embodiment, alumina is selected as th...

Embodiment 2

[0037] Embodiment 2, an improved sound-absorbing material, including zeolite particles, adhesives and nano-metal oxides, zeolite particles, adhesives and nano-metal oxides are mixed and granulated to form sound-absorbing particles; the zeolite particles are pure SiO 2 Modified. Alumina is selected as the nanometer metal oxide, and the particle size of the nanometer metal oxide is 50 nanometers; the adhesive is an organic polymer binder, and the organic polymer binder is polyacrylate.

[0038] Zeolite particles, adhesives and nano metal oxides are mixed and granulated to form sound-absorbing particles, and the sound-absorbing particles are spherical or quasi-spherical; the mass ratio of the zeolite particles in the sound-absorbing particles ranges from 90% to 99%; the nano-metal The mass proportion of the oxide in the sound-absorbing particles ranges from 20 ppm to 20000 ppm; the mass proportion of the adhesive in the sound-absorbing particles ranges from 1% to 10%. The averag...

Embodiment 3

[0045] Embodiment 3, an improved sound-absorbing material, including zeolite particles, adhesives and nano-metal oxides, zeolite particles, adhesives and nano-metal oxides are mixed and granulated to form sound-absorbing particles; the zeolite particles are pure SiO 2 Modified. The nanometer metal oxide is nickel oxide, and the particle size of the nanometer metal oxide is 80 nanometers; the adhesive is an organic polymer binder, and the organic polymer binder is polyurethane.

[0046] Zeolite particles, adhesives and nano metal oxides are mixed and granulated to form sound-absorbing particles, and the sound-absorbing particles are spherical or quasi-spherical; the mass ratio of the zeolite particles in the sound-absorbing particles ranges from 90% to 99%; the nano-metal The mass proportion of the oxide in the sound-absorbing particles ranges from 20 ppm to 20000 ppm; the mass proportion of the adhesive in the sound-absorbing particles ranges from 1% to 10%. The average parti...

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Abstract

The invention relates to an improved acoustic material which comprises zeolite particle, adhesive and nanocrystalline metal oxide. The zeolite particle, adhesive and nanocrystalline metal oxide are mixed and pelletized into sound-absorbing grain. The nanocrystalline metal oxide is selected from one or more of aluminum oxide, copper oxide, ferric oxide, zinc oxide, zirconium oxide and nickel oxide. The sound-absorbing grain is prepared according to the following steps: taking zeolite particle, adhesive and nanocrystalline metal oxide at certain mass ratio; mixing with water and then stirring and dispersing into a suspension; treating the dispersed suspension in the manner of spray granulation or titration granulation; screening and drying the prepared grain, thereby acquiring the sound-absorbing grain. According to the invention, the bonding strength of zeolite particle in the sound-absorbing grain is effectively increased, the phenomena of breaking and generating micro-powder of the sound-absorbing grain in the electrifying working process can be avoided and the problem of failure in the electrifying working process of the sound-absorbing grain can be effectively solved.

Description

Technical field: [0001] The invention relates to the technical field of electroacoustic products, and more specifically relates to an improved sound-absorbing material. Background technique: [0002] As electronic products become thinner and lighter, the resonant cavity of speaker system components becomes smaller and smaller, the resonant frequency will increase, and the sensitivity of low-frequency sound pressure will decrease, which directly affects the acoustic performance. After verification, it is found that porous materials such as activated carbon and zeolite can effectively absorb and release air molecules, and put them into the resonant cavity of the speaker assembly, and increase the space of the resonant cavity by absorbing and releasing air molecules, thereby improving the resonance frequency and enhancing the acoustics performance. [0003] At present, the new sound-absorbing materials with better application effects are mainly zeolite powder with a silicon-al...

Claims

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Application Information

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IPC IPC(8): C04B26/06C04B26/16
CPCC04B26/06C04B26/16C04B14/303C04B14/047C04B14/30
Inventor 鄢琳琳
Owner 苏州夸克新材料科技有限公司
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