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Bionic non-smooth surface polyurethane foam board with cylindrical pits and preparation method

A technology of polyurethane foam board and non-smooth surface, which is applied in the field of bionic non-smooth surface polyurethane foam board and its preparation, can solve the problems of staying and vacancy, and achieves the improvement of sound absorption performance, sound absorption performance and absorption rate. Effect

Pending Publication Date: 2018-07-13
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, this field only stays in the research on non-smooth surface noise reduction, and there is a gap in the research on sound absorption;

Method used

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  • Bionic non-smooth surface polyurethane foam board with cylindrical pits and preparation method
  • Bionic non-smooth surface polyurethane foam board with cylindrical pits and preparation method
  • Bionic non-smooth surface polyurethane foam board with cylindrical pits and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Design and manufacture of biomimetic non-smooth morphological polyurethane foam panels with semi-cylindrical dimples.

[0046] refer to figure 1 with figure 2 , the non-smooth surface shape of the polyurethane foam board is formed by semi-cylindrical pits 11 arranged uniformly on the surface of the substrate. The distance L between the semi-cylindrical pits 11 is 4mm. Substrate 1 is made of polyurethane raw material, and the overall material thickness is 30mm. Compared with the polyurethane foam with smooth surface of the same substrate material, the designed and manufactured polyurethane foam with semi-cylindrical pits has significantly improved sound absorption performance at intermediate and high frequencies, and the quality has decreased by 4.4 %.

Embodiment 2

[0048] Design and manufacture of biomimetic non-smooth form polyurethane foam panels with semi-elliptical cylindric pits.

[0049] refer to image 3 with Figure 4 , the non-smooth surface shape of the polyurethane foam board is formed by the semi-elliptic cylindrical pits 12 arranged uniformly on the surface of the substrate. The axis a is 4 mm, and the distance L between adjacent semi-elliptic cylindrical pits 12 is 4 mm. Substrate 1 is made of polyurethane raw material, and the thickness of the overall material is 30mm. Compared with the polyurethane foam with smooth surface of the same substrate material, the designed and manufactured polyurethane foam with semi-elliptic column pits has significantly improved sound absorption performance at mid-frequency and high-frequency, and its quality is reduced. 5.3%.

[0050] In summary of the above embodiments, the positive effects obtained by the present invention can be seen from the following sound absorption performance comp...

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Abstract

The invention discloses a bionic non-smooth surface polyurethane foam board with cylindrical pits. The bionic non-smooth surface polyurethane foam board comprises a base board, the cylindrical pits are arranged on the upper surface of the base board, the cylindrical pits and the base board are structurally integrated and made of polyurethane, and the cylindrical pits include uniformly arranged semi-cylindrical pits and semi-elliptic cylindrical pits. The polyurethane foam board can show excellent sound absorption performances within a narrow thickness range, so that the purposes of sound absorption and noise reduction are achieved.

Description

technical field [0001] The invention relates to the technical field of acoustic materials, in particular to a bionic non-smooth surface polyurethane foam board with a cylindrical pit shape and a preparation method thereof. Background technique [0002] The non-smooth surface bionic theory refers to the non-smooth characteristics of the biological surface that the organisms show for their own survival to adapt to the environment. The state of the surface of the organism is shown as a biological non-smooth surface, and this characteristic shown by the surface of the organism is an objective existence in nature. Non-smooth bionic technology is a scientific application technology to solve engineering problems based on the non-smooth biological structure in nature. [0003] With the development of the automobile industry, automobile manufacturers have increasingly strict requirements on the NVH performance of automobiles. The quality of acoustic packaging directly affects the l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/162C08G18/66C08G18/48C08G18/32
CPCG10K11/162C08G18/3281C08G18/48C08G18/6688
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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