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A low-frequency sound-absorbing needle-punched nonwoven composite material and its preparation method and application

A composite material and non-woven technology, which is applied in the direction of sound-emitting devices, instruments, building components, etc., can solve the problems of poor low-frequency sound absorption performance, and achieve improved low-frequency sound absorption performance, good sound absorption performance, and excellent low-frequency sound absorption performance. Effect

Inactive Publication Date: 2015-12-23
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, in order to solve the defect of poor low-frequency sound-absorbing performance of sound-absorbing materials, the present invention has developed a low-frequency sound-absorbing needle-punched nonwoven composite material

Method used

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  • A low-frequency sound-absorbing needle-punched nonwoven composite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] According to the mass percentage, 90% of the kapok fiber and 10% of the hollow polyester fiber are mixed, opened, carded, formed into a web, reinforced with needles, wound, and cut to obtain the kapok fiber / hollow polyester nonwoven fabric. The nonwoven fabric has a thickness of 1cm and a bulk density of 190g / m 2 .

Embodiment 2

[0030] According to the mass percentage, 90% of the kapok fiber and 10% of the hollow polyester fiber are mixed, opened, carded, formed into a web, reinforced with needles, wound, and cut to obtain the kapok fiber / hollow polyester nonwoven fabric. The nonwoven fabric has a thickness of 3cm and a bulk density of 387g / m 2 .

Embodiment 3

[0032] According to the mass percentage, 90% of the kapok fiber and 10% of the hollow polyester fiber are mixed, opened, carded, formed into a web, reinforced with needles, wound, and cut to obtain the kapok fiber / hollow polyester nonwoven fabric. The nonwoven fabric has a thickness of 3cm and a bulk density of 387g / m 2 . Put a polyethylene film with a thickness of 0.08mm flatly on one side of the above-mentioned non-woven fiber web, and put them together in an oven to raise the temperature (110-130°C); take out the material and cool it down.

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Abstract

The invention relates to low-frequency sound absorption needling non-woven composite materials and a preparation method of the low-frequency sound absorption needling non-woven composite materials and application of the low-frequency sound absorption needling non-woven composite materials. The composite materials comprise kapok fibers or hollow Dacron non-woven fabric and polyethylene films. The preparation method comprises: mixing, opening, carding and meshing are conducted to 60%-90% kapok fibers and 40%-10% hollow Dacron non-woven fabric according to mass percent; a fiber mesh is inputted in a needling machine so as to conduct needling reinforcement, the fiber mesh is reeled and cut off so as to obtain kapok or hollow Dacron needle non-woven fabric; the polyethylene films in 0.06mm-0.10mm are smoothly placed on one side of the needle non-woven fiber mesh, and are composited, taken out and cooled, and then the low-frequency sound absorption needling non-woven composite materials are obtained. The composite materials can be applied to the field of automotive trim, construction, high-speed rail and the like. The sound absorption materials have the advantages of being light in weight, simple in operation of the preparation method, good in economic benefit and suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of low-frequency sound-absorbing materials and their preparation and application, in particular to a low-frequency sound-absorbing needle-punched non-woven composite material and its preparation method and application. Background technique [0002] At present, the sound-absorbing materials at home and abroad have good sound-absorbing effects in medium and high frequencies, but poor sound-absorbing effects in low frequencies. In order to improve the low-frequency sound absorption performance of the material, the general method is to increase the thickness of the material, which will improve the low-frequency sound absorption performance of the material, but it is not obvious, and the use is also subject to certain restrictions, such as the use of space. constraints, material volume and cost constraints. In addition, using the resonant sound absorption mechanism of the micro-perforated plate to combine the sound-absorb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10K11/162E04B1/84
Inventor 晏雄刘雪亭杨旭东张慧萍洪杰
Owner DONGHUA UNIV
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