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A kind of sound-absorbing composite structure material and its preparation method

A composite structure and composite material technology, applied in the field of sound-absorbing materials, can solve problems such as poor sound-absorbing performance, and achieve the effect of broadening the frequency range of sound-absorbing action and being easy to operate.

Inactive Publication Date: 2011-12-14
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Among the existing sound-absorbing materials, one is to use resonance to complete energy conversion to achieve the purpose of sound absorption. It often has better sound-absorbing performance in a specific frequency range, and the sound-absorbing performance away from this frequency range is poor. Another kind of porous material is that after sound waves pass through the pores of the material, the air in the pores and the material vibrate, and through friction and viscous resistance, the sound energy is converted into heat energy and absorbed. Good sound absorption performance, in order to get better sound absorption performance in the middle and low frequencies, the material often needs to be made very thick

Method used

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  • A kind of sound-absorbing composite structure material and its preparation method
  • A kind of sound-absorbing composite structure material and its preparation method
  • A kind of sound-absorbing composite structure material and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A sound-absorbing composite structural material, the components include: a perforated plate and CPE / SHSF (mass percentage is 4:1); the preparation steps of the above-mentioned sound-absorbing composite structural material are as follows:

[0043] The first step of composite material preparation:

[0044] 1) Raise the temperature of the rollers on the double-roller plastic refining machine to 65°C and keep the matrix stable; add CPE, and mix the CPE into sheets through the surface temperature of the rollers and the shear force formed between the rollers. Viscous fluid state; add SHPF, use a cutter as an auxiliary mixing tool to make the components evenly mixed, the total mixing time is 45 minutes, and peel off from the roller for hot press vulcanization;

[0045] 2) Spread the cooled mixed film evenly in the inner cavity of the mold, clamp the mold with steel plates up and down, and use a layer of high-temperature anti-adhesive film between the steel plate and the mold; ...

Embodiment 2

[0051] A sound-absorbing composite structural material, the components include: a perforated plate and CPE / SHSF (mass percentage is 4:1);

[0052] The preparation steps of the composite structural material are the same as in Example 1, except that the thickness of the perforated plate is 1.5 mm, the hole diameter is 5 mm, and the porosity is 60%; the test surface is not a perforated plate but a film.

Embodiment 3

[0054] A sound-absorbing composite structural material, the components include: a perforated plate and CPE / SHSF (mass percentage is 4:1);

[0055] The preparation steps of the composite structural material are the same as those in Example 1, except that the process of gluing changes from two layers to four layers. The specific combination is perforated plate (thickness 1.5mm, aperture 5mm porosity 50%) / composite material (thickness 2mm) / perforated plate (thickness 1.5mm, aperture 5mm porosity 40%) / composite material (thickness 1mm); perforated plate ( Thickness 1.5mm, aperture 5mm porosity 50%) / composite material (thickness 1mm) / perforated plate (thickness 1.5mm, aperture 5mm porosity 40%) / composite material (thickness 2mm); perforated plate (thickness 2mm, aperture 5mm porosity rate 60%) / composite material (thickness 3mm) / perforated plate (thickness 1.5mm, aperture 5mm porosity 60%) / composite material (thickness 2mm) in total three different combinations. (The test surface i...

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Abstract

The invention relates to a sound absorption composite structural material and a preparation method thereof. The material comprises the components of a chlorinated polyethylene / seven-hole hollow polyester staple fiber composite material and a perforation plate, wherein the mass ratio of chlorinated polyethylene to a seven-hole hollow polyester staple fiber is 4 to 1. The preparation method comprises the following steps of: (1) perforating stainless steel according to a triangular distribution mode, cleaning the surface of the stainless steel, and thus obtaining the perforation plate; and (2) flatly coating an adhesive on the surface of the chlorinated polyethylene / seven-hole hollow polyester staple fiber composite material, and thus obtaining the material. The sound absorption composite structural material can effectively absorb sound energy, and two different sound absorption mechanisms of a porous material and film resonance vibration can be fully used for expanding a sound absorption effect field in a cooperation way along with the increase of the number of structural layers; and the material is easy to prepare, and the material and the preparation method are suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of sound-absorbing materials, in particular to a sound-absorbing composite structural material and a preparation method thereof. Background technique [0002] Among the existing sound-absorbing materials, one is to use resonance to complete energy conversion to achieve the purpose of sound absorption. It often has better sound-absorbing performance in a specific frequency range, and the sound-absorbing performance away from this frequency range is poor. Another kind of porous material is that after the sound wave passes through the pores of the material, it causes the air in the pores to vibrate with the material, and through friction and viscous resistance, the sound energy is converted into heat energy and absorbed. Good sound absorption performance, in order to obtain better sound absorption performance in the middle and low frequencies, the material often needs to be made very thick. [0003] In practic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B3/24B32B27/06B32B27/30C08L23/28C08L67/02B29C65/52B29B7/38
Inventor 晏雄姜生周晓欧张慧萍魏建华蔡永东洪杰
Owner DONGHUA UNIV
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