Light and thin low-frequency sound absorption material and preparation method and application thereof

A sound-absorbing material and low-frequency technology, which is applied in chemical instruments and methods, transportation and packaging, and final product manufacturing, can solve the problems of low porosity of woven fabrics, small thickness of woven fabrics, and poor sound absorption performance, and achieve low-frequency absorption Good sound effect, light weight, and the effect of improving low-frequency sound absorption performance

Active Publication Date: 2021-04-16
WUHAN TEXTILE UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thickness of the woven fabric is small, the porosity of the woven fabric is low, and the sou

Method used

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  • Light and thin low-frequency sound absorption material and preparation method and application thereof

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Embodiment 1

[0027] The hollow polyester yarn is warped, drawn in, weaved, and the fabric structure diagram and the upper machine diagram are changed to obtain the bark crepe woven fabric and the honeycomb woven fabric respectively; the polypropylene fiber is opened, carded, and formed into a net. Acupuncture and reinforcement to obtain polypropylene needle-punched nonwovens; polyester yarns are warped, threaded, and woven to obtain polyester warp-knitted fabrics; polyurethane foam is quickly passed through a propane gas flame burning at 1300-1500 ° C to make it The upper and lower surfaces are heated, and the polyester warp-knitted fabric and polypropylene non-woven fabric are placed on the upper and lower sides of the polyurethane foam, pressurized by a roller, and cooled to obtain a flame-melted layer of polyester warp-knitted fabric / polyurethane foam / polypropylene non-woven fabric Pressed fabric composite material; the woven fabric and composite material are laminated by yarn stitching ...

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Abstract

The invention relates to a light and thin low-frequency sound absorption material and a preparation method and application thereof, the sound absorption material comprises four layers, the upper layer is bark crepe woven fabric, the middle layer is two layers of honeycomb woven fabric, and the lower layer is polyester warp knitted fabric/polyurethane foam/polypropylene non-woven fabric flame fusion laminated composite material. The preparation method comprises the following steps: warping, drawing-in and weaving hollow polyester yarns to respectively obtain a bark crepe woven fabric and a honeycomb woven fabric; laminating the polyester warp-knitted fabric, polyurethane foam and polypropylene non-woven fabric by adopting a flame fusion laminating method to obtain a polyester warp-knitted fabric/polyurethane foam/polypropylene non-woven fabric flame fusion laminated composite material; and laminating the four layers of materials by adopting a yarn sewing method to obtain the light and thin low-frequency sound absorption material. The sound absorption material can be applied to the fields of automotive trim, buildings, high-speed rails and the like; and the sound absorption material is light and thin, the thickness is 6.45 mm, the preparation method is simple, the economic benefit is good, and the sound absorption material is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of low-frequency sound-absorbing material and its preparation and application, in particular to a light and thin low-frequency fabric sound-absorbing material and its preparation method and application. Background technique [0002] Traditional porous sound-absorbing materials have poor effect on low-frequency noise, and light-weight sound-absorbing materials with excellent low-frequency and broadband sound-absorbing performance have become the focus of research. Increasing the thickness of the porous material can improve the low-frequency sound absorption performance of the material to a certain extent, but at the same time it also increases the material processing cost and material use space. At present, the sound absorption structure of the perforated plate or micro-perforated plate and the air cavity can significantly improve the low-frequency sound absorption performance, and the position of the low-frequency abs...

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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IPC IPC(8): B32B27/02B32B27/12B32B27/36B32B27/40B32B5/06B32B3/12B32B37/06B32B37/10B32B37/00E04B1/84B60R13/02B60R13/08
CPCY02P70/62
Inventor 刘雪亭汪琼邹汉涛蒋晶晶肖露韩瑞
Owner WUHAN TEXTILE UNIV
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