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Laminated impedance change composite structure sound absorption material and preparation method and application thereof

A technology of sound-absorbing material and composite structure, which is applied in chemical instruments and methods, sound-producing equipment, layered products, etc. The effect of short cycle and simple process

Pending Publication Date: 2022-01-21
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the disadvantages of poor mid-low frequency sound absorption performance and weak mechanical properties of the sound-absorbing materials in the above-mentioned background technology. The present invention provides a laminated impedance-changing composite structure sound-absorbing material and its preparation method and application, the material structure design is reasonable, the manufacturing process is simple, and the sound absorption performance and mechanical properties of the middle and low frequencies are improved.

Method used

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  • Laminated impedance change composite structure sound absorption material and preparation method and application thereof
  • Laminated impedance change composite structure sound absorption material and preparation method and application thereof

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Effect test

Embodiment 1

[0039] A method for preparing a laminated impedance-changing composite structure sound-absorbing material, comprising the following steps:

[0040] Step 1: The three-dimensional spacer fabric is woven by a double-needle bed Raschel warp knitting machine with a total of 6 bars from GB1 to GB6, in which the upper surface and the lower surface of the fabric are warp-knitted spacer fabrics with knitting chains and weft insertion, GB2 The yarn on GB5 is 300D / 96F polyester multifilament, the carbon fiber tow on GB1 and GB6, and the polyester monofilament with a diameter of 0.2mm on GB3 and GB4; The front needle bed weaves the upper surface of the three-dimensional spacer fabric, the two bars GB5 and GB6 knit the lower surface of the fabric on the rear needle bed, and the two bars GB3 and GB4 carry the spacer yarns, knitting alternately on the front and rear needle beds The upper and lower surfaces of the three-dimensional spacer fabric are connected with spacer wires to form a three...

Embodiment 2

[0047] A method for preparing a laminated impedance-changing composite structure sound-absorbing material, comprising the following steps:

[0048]Step 1: The three-dimensional spacer fabric is woven by a double-needle bed Raschel warp knitting machine with a total of 6 bars from GB1 to GB6, in which the upper surface and the lower surface of the fabric are warp-knitted spacer fabrics with knitting chains and weft insertion, GB2 The yarn on GB5 is 300D / 96F polyester multifilament, the carbon fiber tow on GB1 and GB6, and the polyester monofilament with a diameter of 0.2mm on GB3 and GB4; The front needle bed weaves the upper surface of the three-dimensional spacer fabric, the two bars GB5 and GB6 knit the lower surface of the fabric on the rear needle bed, and the two bars GB3 and GB4 carry the spacer yarns, knitting alternately on the front and rear needle beds The upper and lower surfaces of the three-dimensional spacer fabric are connected with spacer wires to form a three-...

Embodiment 3

[0055] A method for preparing a laminated impedance-changing composite structure sound-absorbing material, comprising the following steps:

[0056] Step 1: The three-dimensional spacer fabric is woven by a double-needle bed Raschel warp knitting machine with a total of 6 bars from GB1 to GB6, in which the upper surface and the lower surface of the fabric are warp-knitted spacer fabrics with knitting chains and weft insertion, GB2 The yarn on GB5 is 300D / 96F polyester multifilament, the carbon fiber tow on GB1 and GB6, and the polyester monofilament with a diameter of 0.2mm on GB3 and GB4; The front needle bed weaves the upper surface of the three-dimensional spacer fabric, the two bars GB5 and GB6 knit the lower surface of the fabric on the rear needle bed, and the two bars GB3 and GB4 carry the spacer yarns, knitting alternately on the front and rear needle beds To connect the upper and lower surfaces of the three-dimensional spacer fabric with spacer wires to form a three-di...

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Abstract

The invention discloses a laminated impedance change composite structure sound absorption material and a preparation method and application thereof, which relate to the technical field of functional materials. The sound absorption material comprises a three-dimensional spacer fabric, and the interior of the three-dimensional spacer fabric is sequentially filled with a polyurethane layer and an aerogel layer from the lower surface layer to the upper surface layer. The sound absorption material provided by the invention is light, thin and low in density, and has good sound absorption performance in air.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a sound-absorbing material with a laminated impedance change composite structure and its preparation method and application. Background technique [0002] Due to its excellent properties such as high specific surface area, high porosity, and low density, airgel materials have the sound absorption mechanism of porous materials and damping materials, but their poor mechanical properties and high production costs severely limit their use. Application in sound-absorbing materials. However, sodium alginate airgel has the advantages of biodegradability, abundant resources, low price and environmental friendliness, so it can be further studied on sound absorption. [0003] Polyurethane porous foam material is a widely used sound-absorbing material due to its advantages of light weight, good heat and sound insulation, superior sound-absorbing performance, convenient process...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/02B32B27/36B32B27/06B32B9/00B32B9/04G10K11/162D06M15/13C08G18/48D06M101/32D06M101/40C08G101/00
CPCB32B5/02B32B5/26G10K11/162D06M15/13C08G18/48B32B2262/0284B32B2262/106B32B2262/14B32B2260/023B32B2260/046B32B2307/10D06M2101/32D06M2101/40C08G2101/00
Inventor 支超齐立泽余灵婕孟家光薛涛王永臻刘亚明程燕婷
Owner XI'AN POLYTECHNIC UNIVERSITY
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