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Acoustic packaging material with convex hull form and preparation method of acoustic packaging material

A technology of packaging materials and convex hulls, which is applied in the direction of sound-emitting devices and instruments, can solve the problems of acoustic performance research and vacancies of non-smooth surface acoustic packaging materials, and achieve good wear resistance, improved sound absorption performance, and controllable thickness. Effect

Pending Publication Date: 2018-06-29
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current research on the silent flight of birds and insects with different non-smooth surfaces mainly focuses on aeroacoustics, and there is a gap in the research on the acoustic performance of non-smooth surface acoustic packaging materials.

Method used

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  • Acoustic packaging material with convex hull form and preparation method of acoustic packaging material
  • Acoustic packaging material with convex hull form and preparation method of acoustic packaging material
  • Acoustic packaging material with convex hull form and preparation method of acoustic packaging material

Examples

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preparation example Construction

[0041] A method for preparing an acoustic packaging material with a convex hull shape, specifically comprising the following steps:

[0042] (1) Weigh polyol 330N, polyol 3630, catalyst A33, triethanolamine, catalyst A1, silicone oil, MDI and deionized water according to the material ratio;

[0043] (2) Place the polyol 330N, polyol 3630, catalyst A33, triethanolamine, catalyst A1, silicone oil, and deionized water weighed in the above step (1) in a paper cup, and use a material mixer at a stirring speed of 2000r / min Stir for 90s;

[0044] (3) Pour the MDI weighed in the above step (1) into a paper cup, use a mixer to stir at 500r / min, and stir until the paper cup heats up;

[0045] (4) Pour the mixed material stirred in the above step (3) into the mold of the acoustic packaging material having a convex hull shape rapidly, and seal the mold;

[0046] (5) Put the mold into a drying oven, set the temperature of the drying oven to 50° C., store it in the incubator for 2 hours, ...

Embodiment 1

[0048] Design and manufacture the acoustic packaging material with a convex hull shape with a convex hull unit spacing of 4 mm.

[0049] Please refer to the attached figure 2 and image 3 , the non-smooth surface shape of the acoustic package is that the convex hull units are evenly distributed on the surface of the substrate. The convex hull units are hemispheres with a diameter of 3mm, and the distance between two adjacent convex hull units is 4mm. The acoustic packaging matrix is ​​made of polyurethane material, and the thickness of the matrix composed of the substrate and the convex hull unit is 30mm. Compared with the smooth surface polyurethane foam of the same matrix, the designed and manufactured polyurethane foam on the convex hull surface with a distance of 4mm between the convex hull units has better performance in medium frequency and The high-frequency sound absorption performance is significantly improved, and the mass is reduced by 5%.

Embodiment 2

[0051] Design and manufacture the acoustic packaging material with a convex hull shape with a convex hull unit spacing of 5 mm.

[0052] Please refer to the attached figure 2 and image 3 , the non-smooth surface shape of the acoustic package is that the convex hull units are evenly distributed on the surface of the substrate. The convex hull units are hemispheres with a diameter of 3mm, and the distance between two adjacent convex hull units is 5mm. The acoustic packaging matrix is ​​made of polyurethane material, and the thickness of the matrix composed of the substrate and the convex hull unit is 30mm. Compared with the smooth surface polyurethane foam of the same matrix, the designed and manufactured polyurethane foam on the convex hull surface with a distance of 4mm between the convex hull units has better performance in medium frequency and The high-frequency sound absorption performance is significantly improved, and the mass is reduced by 6.4%.

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Abstract

The invention discloses an acoustic packaging material with a convex hull form. The acoustic packaging material comprises a substrate and convex hull units, wherein a matrix is prepared from the substrate and the convex hull units integrally; the multiple convex hull units are distributed on the substrate at equal intervals; the substrate and the convex hull units are made of polyurethane; the thickness of the matrix prepared from the substrate and the convex hull units is 30 mm; the convex hull units are hemispheroids, diameter of the convex hull units is 3 mm, and distance between every twoadjacent convex hull units is 4-6 mm. According to the acoustic packaging material with the convex hull form, non-smooth form of the convex hull of flatheaded borer wings is bio-inspired to the acoustic packaging material, so that not only is acoustical absorption coefficient increased, but also noise is effectively reduced; besides, a preparation method of the acoustic packaging material is simple and easy, and the acoustic packaging material has great market popularization and application value.

Description

technical field [0001] The invention relates to the field of acoustic materials, in particular to an acoustic packaging material with a convex hull shape and a preparation method thereof. Background technique [0002] With the development of the automobile industry, the problem of automobile noise is becoming more and more prominent. Acoustic packaging materials can play a very good role in reducing the medium and high frequency noise in the car. Therefore, it is very important to study the application of acoustic materials in automobile noise reduction. It is necessary to study the process and method for the control of automobile noise is very meaningful. At present, the research on acoustic packaging materials is limited to the research on smooth surface acoustic packaging materials, and there is a gap in the research on the sound absorption performance of non-smooth surface acoustic packaging materials. [0003] Gideon is a low-flying insect. The surface of its wings can...

Claims

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Application Information

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IPC IPC(8): G10K11/162C08G18/66C08G18/32
CPCG10K11/162C08G18/3281C08G18/66
Inventor 陈书明张继修戢杨杰张喆谷飞鸿王登峰
Owner JILIN UNIV
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