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Three-component sound-absorbing cotton and preparation method thereof

A sound-absorbing cotton, three-component technology, applied in the field of sound-absorbing materials, can solve the problem of low sound-absorbing coefficient, achieve the effect of improving the sound-absorbing coefficient, improving the sound-absorbing coefficient of the material, and easy operation

Inactive Publication Date: 2020-09-29
GUANGXI DEFUTE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are the following defects: in the frequency range of 1KHz-2KHz, the sound absorption coefficient is low, less than 0.4, in order to improve the sound absorption effect, it is necessary to greatly increase the density (thickness) of the sound absorption surface

Method used

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  • Three-component sound-absorbing cotton and preparation method thereof
  • Three-component sound-absorbing cotton and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Such as figure 1 As shown, the three-component sound-absorbing cotton of this embodiment includes an upper surface layer 1, a first adhesive layer 2, an intermediate layer 3, a second adhesive layer 4, and a lower surface layer 5, which are stacked sequentially from top to bottom. 3 is made of polyurethane porous foam material, the upper surface layer 1 and the lower surface layer 5 are both made of mixed fibers of polyethylene terephthalate fiber and polypropylene fiber, the first adhesive layer 2 and the The second adhesive layer 4 is made of adhesive.

[0036] Wherein, the thickness of the upper surface layer 1 and the lower surface layer 5 is the same, both are 3mm; the thickness of the middle layer 3 is 9mm, and the thickness of the first adhesive layer 2 and the second adhesive layer 4 are both 0.1mm.

[0037] The open porosity of described polyurethane porous foam material is 50%, and density is 0.03g / cm 3 , cell diameter ≤ 5mm.

[0038] In the mixed fiber of...

Embodiment 2

[0051] Such as figure 1 As shown, the three-component sound-absorbing cotton of this embodiment includes an upper surface layer 1, a first adhesive layer 2, an intermediate layer 3, a second adhesive layer 4, and a lower surface layer 5, which are stacked sequentially from top to bottom. 3 is made of polyurethane porous foam material, the upper surface layer 1 and the lower surface layer 5 are both made of mixed fibers of polyethylene terephthalate fiber and polypropylene fiber, the first adhesive layer 2 and the The second adhesive layer 4 is made of adhesive.

[0052] Wherein, the thickness of the upper surface layer 1 and the lower surface layer 5 is the same, both are 5mm; the thickness of the middle layer 3 is 15mm, and the thickness of the first adhesive layer 2 and the second adhesive layer 4 are both 0.5mm.

[0053] The open porosity of described polyurethane porous foam material is 20%, and density is 0.001g / cm 3 , cell diameter ≤ 5mm.

[0054] In the mixed fiber ...

Embodiment 3

[0065] Such as figure 1 As shown, the three-component sound-absorbing cotton of this embodiment includes an upper surface layer 1, a first adhesive layer 2, an intermediate layer 3, a second adhesive layer 4, and a lower surface layer 5, which are stacked sequentially from top to bottom. 3 is made of polyurethane porous foam material, the upper surface layer 1 and the lower surface layer 5 are both made of mixed fibers of polyethylene terephthalate fiber and polypropylene fiber, the first adhesive layer 2 and the The second adhesive layer 4 is made of adhesive.

[0066] Wherein, the thickness of the upper surface layer 1 and the lower surface layer 5 is the same, both are 1.5mm; the thickness of the middle layer 3 is 3mm, and the thickness of the first adhesive layer 2 and the second adhesive layer 4 are equal. 0.3mm.

[0067] The open porosity of described polyurethane porous foam material is 80%, and density is 0.06g / cm 3 , cell diameter ≤ 5mm.

[0068] In the mixed fibe...

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Abstract

The invention discloses three-component sound-absorbing cotton and a preparation method thereof, and belongs to the technical field of sound-absorbing materials. The three-component sound-absorbing cotton comprises three components, wherein an upper surface layer (1), a first adhesive layer (2) a middle layer (3), a second adhesive layer (4) and a lower surface layer (5) are sequentially arrangedin a stacked mode from top to bottom. The middle layer (3) is made of polyurethane porous foam materials, the upper surface layer (1) and the lower surface layer (5) are both made of mixed fibers of polyethylene glycol terephthalate fibers and polypropylene fibers, and the first adhesive layer (2) and the second adhesive layer (4) are both made of adhesives. The invention further discloses the preparation method of the three-component sound-absorbing cotton. The three-component sound-absorbing cotton is of a three-layer structure, has excellent sound-absorbing and sound-insulating effects, andis small in overall surface density.

Description

technical field [0001] The invention relates to a three-component sound-absorbing cotton and a preparation method thereof, belonging to the technical field of sound-absorbing materials. Background technique [0002] Noise directly affects people's physical and mental health and the improvement of quality of life. Long-term exposure to noise will cause hearing loss and even induce some diseases. To stay away from noise, all we can do is sound insulation and sound absorption. The sound-absorbing cotton can convert the vibration energy of medium and high frequency noise generated in life into the kinetic energy of the fine denier fibers inside the sound-absorbing cotton, and conduct it into heat energy and disappear, so as to achieve the function of sound absorption and noise reduction. [0003] With the progress of society and the continuous improvement of people's consumption level, customers have higher and higher requirements for automobile sound absorption, sound insulati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/40B32B27/36B32B27/32B32B27/12B32B5/02B32B37/12B60R13/08
CPCB32B5/18B32B5/028B32B5/08B32B5/245B32B37/12C08G18/28B60R13/08C08G2101/00B32B2262/0284B32B2262/0253B32B2266/0278B32B2307/102B32B2605/08
Inventor 蓝国勇
Owner GUANGXI DEFUTE TECH CO LTD
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