Energy conversion material of sound absorption

A sound-absorbing material and energy transfer technology, which can be used in sound-producing equipment, lamination, instruments, etc., can solve problems such as poor sound-absorbing performance, and achieve the effects of low production cost, high sound absorption coefficient, and easy production and production.

Active Publication Date: 2007-12-26
杜强华微(北京)高新材料科技有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The research on foam sound-absorbing materials has involved metal materials, polymer materials, inorganic materials and organic-inorganic composite materials. At present, polyurethane and polystyrene foam are mainly used in practical applications. The low-frequency band (<500Hz) has poor sound absorption performance. The problem with this type of material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A fiber mat with a porosity of 50% and a thickness of 1 mm is selected from a pure butyl rubber plate with a thickness of 1 mm and aluminum fibers with a diameter of 1 μm. Two butyl rubber sheets were bonded together with an aluminum fiber mat with an epoxy adhesive in the middle.

[0014] The sound absorption coefficient of the sound-absorbing material was tested by the standing wave tube method. The material has a sound absorption coefficient of more than 0.3 in the noise frequency range of 3-4.5KHz and 1-2.5KHz.

Embodiment 2

[0016] A fiber mat with a porosity of 30% and a thickness of 1 mm is selected from a pure butyl rubber plate with a thickness of 1 mm and aluminum fibers with a diameter of 10 μm. Two butyl rubber sheets were bonded together with an aluminum fiber mat with an epoxy adhesive in the middle.

[0017] The sound absorption coefficient of the sound-absorbing material was tested by the standing wave tube method. The material has a sound absorption coefficient of more than 0.3 in the noise frequency range of 3-4.5KHz and 1-2.5KHz.

Embodiment 3

[0019] A fiber mat with a porosity of 50% and a thickness of 3 mm is selected from a pure butyl rubber plate with a thickness of 1 mm and aluminum fibers with a diameter of 50 μm. Two butyl rubber sheets were bonded together with an aluminum fiber mat with an epoxy adhesive in the middle.

[0020] The sound absorption coefficient of the sound-absorbing material was tested by the standing wave tube method. The material has a sound absorption coefficient of more than 0.3 in the noise frequency range of 3-4.5KHz and 1-2.5KHz.

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Abstract

A material enabling to absorb sound and converting absorbed sound to be energy is prepared for using glue to directly stick butyl rubber plate with aluminium-fiber felt or laying unvulcanized butyl rubber plate and alminium-fiber felt in mould to stick said butyl rubber plate with aluminium-fiber felt after process flows of hot-pressing formation and rubber vulvanization as well as demoulding.

Description

technical field [0001] The invention relates to a novel sound-absorbing energy-transfer material, in particular to a novel sound-absorbing energy-transfer material with a composite structure of rubber and metal aluminum fibers. Background technique [0002] With the development of modern industry and transportation and the enhancement of environmental awareness, people's requirements for the sound environment are getting higher and higher, and the problem of noise pollution has become a worldwide problem to be solved. [0003] The so-called sound-absorbing materials usually refer to porous sound-absorbing materials, mainly including fiber materials and foam materials, which are mainly divided into organic fiber sound-absorbing materials, inorganic fiber sound-absorbing materials, metal fiber Acoustic materials, foam sound-absorbing materials, foam metal sound-absorbing and energy-transfer materials. [0004] The early organic fiber sound-absorbing materials have good sound-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/168B32B5/22B32B15/06B32B25/04B32B37/15B32B37/12B32B38/18
Inventor 彭书成陈美兰侯正昌
Owner 杜强华微(北京)高新材料科技有限公司
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