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Sound absorption and noise reduction material and application thereof

A technology of noise reduction and sound absorption, applied in the direction of sound-producing equipment, instruments, etc., can solve the problem that the application of kapok fiber has not been patented, and achieve broad economic and social benefits, simple product process, and good sound absorption effect.

Inactive Publication Date: 2009-12-02
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, the application of kapok fiber in the field of sound absorption and noise reduction has not yet been patented.

Method used

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  • Sound absorption and noise reduction material and application thereof
  • Sound absorption and noise reduction material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1. Preparation of kapok sound-absorbing felt

[0024] 100% pure kapok fiber, after opening, carding, air-laid, needle punching reinforcement, winding and cutting, kapok sound-absorbing felt can be obtained.

[0025] The scanning electron microscope picture of the hollow structure of the kapok fiber is as follows figure 1 Shown.

[0026] The kapok sound-absorbing felt has a thickness of 2cm and a bulk density of 10kg / m 3 , Its normal normal incidence sound absorption coefficient curve is shown as figure 2 Shown. by figure 2 It can be seen that in the high frequency part (greater than 1000 Hz), the kapok sound-absorbing felt shows a good sound absorption effect.

Embodiment 2

[0027] Example 2. Preparation of kapok sound-absorbing felt

[0028] 80% pure kapok fiber and 20% cotton fiber are mixed and opened, carded, air-laid, needle-punched, wound, and cut to obtain kapok sound-absorbing felt.

Embodiment 3

[0029] Example 3. Preparation of kapok sound-absorbing felt

[0030] 70% pure kapok fiber and 30% glass fiber are mixed and opened, carded, air-laid, needle-punched, wound, and cut to obtain kapok sound-absorbing felt.

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Abstract

The invention discloses a sound absorption and noise reduction material and application thereof in preparation of sound absorption and noise reduction products. The sound absorption and noise reduction material provided by the invention mainly comprises natural kapok and can also comprise natural organic fiber, inorganic fiber and synthetic fiber. The total content by mass percentage of the natural organic fiber, inorganic fiber and synthetic fiber is 0-95% of the sound absorption and noise reduction material. As the kapok fiber has the characteristics of high degree of hollowness, dampproof and mothproof, low price and easy availability, the kapok fiber can be made into sound absorption and noise reduction products such as kapok sound absorption batting filling material, kapok acoustic felt, kapok sound absorption non-woven fabrics and the like, the sound absorption and noise reduction has favourable effect, simple preparation technology, low cost, thus having great economic benefit and social benefit.

Description

Technical field [0001] The invention relates to a sound absorption and noise reduction material and its application. Background technique [0002] With the rapid development of modern industry, noise is becoming more and more harmful to humans. Noise pollution, air pollution and water pollution are considered to be the three major environmental hazards in the contemporary world. Noise not only affects people's normal work order and work efficiency, but also affects people's daily life and physical and mental health. Noise control has become a top priority for mankind, and the research on sound-absorbing and noise-reducing materials has become one of the important research directions of scientific and technological workers around the world. [0003] Common sound-absorbing materials include the following categories: [0004] Natural organic fiber materials, including cotton, hemp, sugar cane, wood wool, straw and their products, etc. These materials have good sound absorption effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/162
Inventor 沈杰向海帆张晓艳肖红张小莉施楣梧徐坚
Owner INST OF CHEM CHINESE ACAD OF SCI
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