A porous sound-absorbing material and its processing method

A technology of porous sound absorption and processing method, which is applied in the direction of chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve the problems of sound absorption performance decline, limited application range, high production cost, etc., and achieve simple processing, Excellent mechanical properties and low cost

Active Publication Date: 2016-06-01
NINGBO HUIBANG NOLY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] To sum up, traditional organic and inorganic fiber porous sound-absorbing materials are brittle and easy to break, and the sound-absorbing performance drops seriously after being damp, so the scope of application is greatly limited.
For metal sound-absorbing materials, although their performance is superior, their production cost is high and their quality is heavy, so further development is still needed.
The resonant sound-absorbing structure has a narrow sound-absorbing frequency band

Method used

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  • A porous sound-absorbing material and its processing method
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  • A porous sound-absorbing material and its processing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) The microchannel sheet is processed by the microchannel sheet extrusion device. The device is composed of an extrusion device and an air supply device: the extrusion device is used to plasticize the polymer raw material, shape the cross section, cool and shape and roll; The air supply device provides air of different pressures, which is connected with the injection core in the extruder head to adjust the deformation of the cross-section of the microchannel;

[0038] 2) The temperature of the heating section of the screw extruder: zone 1: 180°C, zone 2: 190°C, zone 3: 190°C, zone 4: 180°C. Screw speed: 0-20r / min, the basic clearance of multi-microchannel sheet extrusion die is 1.6mm;

[0039] 3) The parameters of the extruded microchannel sheet are: the length of the sheet is 30 mm, the thickness is 1.2 mm, the horizontal length of the microchannel cross section is 400 μm, and the vertical length is 350 μm; the average hydraulic diameter of the microchannel is 385 μm....

Embodiment 2

[0046] 1) The microchannel sheet is processed by the microchannel structure extrusion device. The device is composed of an extrusion device and an air supply device: the extrusion device is used to plasticize the polymer raw material, shape the cross section, cool and shape and roll; The air device provides air with different pressures, which is connected with the injection core in the extruder head to adjust the deformation of the cross-section of the microchannel;

[0047] 2) The temperature of the heating section of the screw extruder: zone 1: 180°C, zone 2: 190°C, zone 3: 190°C, zone 4: 180°C. Screw speed: 0-20r / min, the basic clearance of multi-microchannel sheet extrusion die is 1.6mm;

[0048] 3) The parameters of the extruded microchannel sheet are: the length of the sheet is 30 mm, the thickness is 0.8 mm, the horizontal length of the microchannel cross section is 120 μm, and the vertical length is 100 μm; the average hydraulic diameter of the microchannel is 113 μm. ...

Embodiment 3

[0056] 1) The microchannel sheet is processed by the microchannel structure extrusion device. The device is composed of an extrusion device and an air supply device: the extrusion device is used to plasticize the polymer raw material, shape the cross section, cool and shape and roll; The air device provides air with different pressures, which is connected with the injection core in the extruder head to adjust the deformation of the cross-section of the microchannel;

[0057] 2) The temperature of the heating section of the screw extruder: zone 1: 180°C, zone 2: 190°C, zone 3: 190°C, zone 4: 180°C. Screw speed: 0-20r / min, the basic clearance of multi-microchannel sheet extrusion die is 1.6mm;

[0058] 3) The parameters of the extruded microchannel sheet are: the sheet length is 30 mm, the thickness is 1.0 mm, the horizontal length of the cross-section of the microchannel is 300 μm, and the vertical length is 200 μm; the average hydraulic diameter of the microchannel is 255 μm. ...

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Abstract

A porous sound absorption material and a processing method thereof. The invention is characterized in that porous sound absorption material is formed by several layers of sheet material with micro channel structure through combination and superposition pasting, a plurality of holes vertical to the superimposed and pasted sheet materials are arranged on the porous sound absorption material, a plurality of parallel micro channels are arranged in each layer of micro channel sheet material, and micro channels between two adjacent layers of micro channel sheets are mutually perpendicular to each other or at different angles. The processing method is as below: using a thermoplastic polymer as a raw material; extruding, stretching and forming the material by an extrusion device with a specially designed headpiece; then setting, rolling and cutting, and choosing an appropriate number of superposition according to the application need; and finally opening holes with different diameters to obtain the porous sound absorption material. The porous sound absorption material provided by the invention has double characteristics of porous foamed material and resonance plate structure, high and low frequency sound absorption function, excellent comprehensive performance; and the processing technology is simple, environment-friendly and low in cost.

Description

technical field [0001] The invention belongs to the technical field of environmental materials, and relates to a sound-absorbing material, in particular to a porous sound-absorbing material and a processing method thereof. Background technique [0002] With the development of modern industry and the improvement of people's living standards, people's requirements for sound and environment are getting higher and higher. Noise pollution, air pollution, and water pollution are listed as the world's three major pollutions, and it has become a worldwide problem that needs to be solved urgently. In this context, it is particularly important to develop efficient and environmentally friendly sound-absorbing materials. At present, according to the mechanism of sound absorption, sound-absorbing materials are divided into the following three categories: (1) Resonant sound-absorbing structural materials; (2) Porous sound-absorbing materials; (3) Other sound-absorbing structures, mainly ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B3/26B32B27/06B29C47/00
Inventor 许忠斌王柏村黄兴胡瑜露周樯翔郑素霞顾云柱
Owner NINGBO HUIBANG NOLY TECH CO LTD
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