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Low-frequency sound-absorbing rubber-based composite material and preparing method thereof

A technology of sound-absorbing rubber and composite material, which is applied to low-frequency sound-absorbing materials and the fields of their preparation and application, can solve problems such as poor low-frequency sound-absorbing performance, and achieve the effects of good sound-absorbing performance, good economic benefits, and a simple preparation method.

Inactive Publication Date: 2016-04-13
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, in order to solve the defect of poor low-frequency sound-absorbing performance of sound-absorbing materials, the present invention has developed a low-frequency sound-absorbing rubber-based composite material

Method used

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  • Low-frequency sound-absorbing rubber-based composite material and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A low-frequency sound-absorbing rubber-based composite material includes EPDM rubber and kapok fiber, wherein the mass ratio of EPDM rubber and kapok fiber is 100:10.

[0035] The above-mentioned preparation method of low-frequency sound-absorbing rubber-based composite material, the specific steps are:

[0036] The first step: mixing: keep the temperature of the rollers on the double-roller mill at room temperature, add 100 parts by mass of EPDM between the rollers on the double-roller mill, and then add 10 parts by weight to the rubber The kapok fiber is mixed with EPDM rubber and kapok fiber. The mixing temperature is 40°C and the mixing time is 20 minutes. Due to the difference in the surface speed of the two rollers, the cutter is used for manual auxiliary mixing. After mixing and mixing uniformly, peel off the mixed material from the roller, and then cut it into mixed granules for hot pressing;

[0037] The second step: hot press molding: spread the mixed scraps in the ...

Embodiment 2

[0039] A low-frequency sound-absorbing rubber-based composite material, comprising EPDM rubber and kapok fiber, wherein the mass ratio of the EPDM rubber and the kapok fiber is 100:10, and the thickness of the low-frequency sound-absorbing rubber-based composite material It is 3mm. Composite material density is 17.9g / cm 3 . (See attached sound absorption effect figure 1 Zhong 2#)

[0040] The preparation method of the above-mentioned low-frequency sound-absorbing rubber-based composite material is the same as that of Example 1.

Embodiment 3

[0042] A low-frequency sound-absorbing rubber-based composite material includes EPDM rubber, kapok fiber and zeolite powder, wherein the mass ratio of EPDM rubber, kapok fiber and zeolite powder is 100:10:20.

[0043] The above-mentioned preparation method of low-frequency sound-absorbing rubber-based composite material, the specific steps are:

[0044] The first step: mixing: keep the temperature of the rollers on the double-roller mill at room temperature, add 100 parts by mass of EPDM between the rollers on the double-roller mill, and then add 10 parts by weight to the rubber The kapok fiber is mixed with EPDM rubber and kapok fiber. The mixing temperature is 40°C and the mixing time is 20 minutes. Due to the difference in the surface speed of the two rollers, the cutter is used for manual auxiliary mixing. Mix uniformly, add 20 parts by mass of zeolite powder to the mixture, and mix again. The temperature of the second mixing is 40°C, the mixing time is 20 minutes, and the cutt...

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Abstract

The invention provides a low-frequency sound-absorbing rubber-based composite material and a preparing method thereof. The low-frequency sound-absorbing rubber-based composite material is characterized by being prepared from ethylene propylene diene monomer rubber and kawo kawo fibers, wherein the mass ratio of the ethylene propylene diene monomer rubber to the kawo kawo fibers is (80-100):(5-15). The prepared low-frequency sound-absorbing composite material is excellent in low-frequency sound-absorbing performance, the average sound absorption coefficient at 125-1000 Hz is larger than 0.34, and the maximum sound absorption coefficient reaches 0.71; the prepared sound-absorbing composite material is light and thin (1-3 mm), and the preparing method is easy to operate, good in economic benefit and suitable for industrial production. The composite material can be used in automotive interiors, buildings, high-speed rails and other places with big noise, the preparing method is easy and convenient to operate, and the composite material is good in low-frequency sound-absorbing effect, wide in sound-absorbing frequency band, moderate in price and suitable for industrial production.

Description

Technical field [0001] The invention belongs to the field of low-frequency sound-absorbing materials and their preparation and application, and relates to a low-frequency sound-absorbing rubber-based composite material and a preparation method thereof. Background technique [0002] At present, sound-absorbing materials at home and abroad have good sound absorption effects in medium and high frequencies, but low-frequency sound absorption effects are not ideal. In order to improve the low-frequency sound absorption performance of the material, the method of increasing the thickness of the sound-absorbing material is generally adopted. Although this can improve the low-frequency sound absorption performance of the material, the effect is not obvious, and the use is also affected by space, material volume and cost. limit. In addition, the sound-absorbing materials are designed into various geometric shapes, such as spheres, cones, cylinders, hexahedrons, tetrahedrons, etc. This way...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L97/02C08K3/34
CPCC08L23/16C08L97/02C08K3/34
Inventor 晏雄王坤张慧萍庄兴民
Owner DONGHUA UNIV
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