Fiber bundle-mass unit honeycomb fabric sound absorbing material and method of making same

Abstract

The present application relates to a honeycomb fabric sound-absorbing material containing fiber bundle-mass units and a preparation method thereof.The preparation method comprises the following steps: weaving hollow polyester yarns on a weaving device to obtain a hollow polyester honeycomb fabric, and then vertically implanting fiber bundles on the honeycomb protruding parts of the fabric surface by using an electrostatic flocking device to obtain a honeycomb fabric containing fiber bundles; and then attaching a film / mass to the top end of the fiber bundle to obtain a honeycomb fabric sound-absorbing material containing fiber bundle-mass units.The fabric sound-absorbing material is soft, has a wide sound-absorbing frequency band, and has high noise reduction efficiency.The preparation method is simple, has good economic benefits, and is suitable for industrial production.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of porous sound-absorbing materials and its preparation, and particularly relates to a sound-absorbing material containing fiber bundle-mass unit honeycomb fabric and a preparation method thereof. BACKGROUND

[0002] Fiber materials have the characteristics of softness, porosity, high strength and low cost, and have excellent sound-absorbing performance in the medium and high frequency range, and are widely used in the field of sound absorption and noise reduction. Woven fabric has the characteristics of lightness, high fiber coverage and various structural designs, and the periodic concave-convex array of honeycomb cells on the surface of the honeycomb fabric increases the multiple scattering of incident sound waves in the honeycomb and increases the sound wave attenuation, thereby improving the porous sound-absorbing efficiency of the fabric. By adjusting the structural morphology and weaving method of the fibers and yarns, the internal structure and surface topography of the fabric can be adjusted to control the sound-absorbing performance of the fabric. Therefore, the honeycomb fabric has great application potential in the field of sound absorption and noise reduction. However, the internal pores of the woven fabric are relatively large and the fabric thickness is relatively small, which results in weak sound-absorbing performance and limits its application in the field of sound absorption and noise reduction. Sound-absorbing materials containing resonance units utilize the local vibration of resonance units to achieve the absorption of specific frequency sound waves by thin materials, thereby improving the sound-absorbing performance of the materials and providing new ideas for the design and application of thin sound-absorbing materials.

[0003] The present application combines the internal porosity and multiple scattering of the concave-convex surface of the honeycomb fabric with the resonance sound absorption of the fiber bundle-mass unit, and based on the weave design of the honeycomb fabric, uses the weaving method to obtain a honeycomb weave fabric, and then uses the electrostatic flocking technology to obtain a sound-absorbing material containing fiber bundle-mass unit honeycomb fabric. Therefore, the present application develops a sound-absorbing material containing fiber bundle-mass unit honeycomb fabric. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a sound-absorbing material containing fiber bundle-mass unit honeycomb fabric and a preparation method thereof. The sound-absorbing material prepared by the method has excellent sound-absorbing performance, with an average sound-absorbing coefficient of 0.692 in the frequency range of 500-1800 Hz and a maximum sound-absorbing coefficient of 0.95. The sound-absorbing material prepared by the present application has a wide absorption frequency band, with a sound-absorbing coefficient greater than 0.4 in the frequency range of 600-1800 Hz. The sound-absorbing material prepared by the present application is soft, has a wide sound-absorbing frequency band and high noise reduction efficiency, and the preparation method is simple, economical and suitable for industrial production.

[0005] The fiber bundle-mass unit honeycomb fabric sound-absorbing material of the present application is composed of fiber bundle-mass units and honeycomb fabric, the fiber bundle is combined with the honeycomb protruding part of the fabric surface by electrostatic flocking, and the mass is combined with the top end of the fiber bundle by adhesive, wherein the fiber bundle-mass unit is composed of fiber bundle and mass, the mass is composed of film and mass block, and the honeycomb fabric is obtained by weaving hollow polyester yarns; the film is PE or PP plastic film, the mass block is iron block or aluminum block or rubber block; the number of fiber bundle-mass units is 1-5, the length of fiber bundle is 1-5 mm, the fiber in the fiber bundle is wool fiber or spandex / hollow polyester mixed fiber, the thickness of the film is 0.05-0.1 mm, the mass of the mass block is 0.3-1.5 g, and the grammage of the honeycomb fabric is 400-500 g / m 2 .

[0006] The preparation method of the fiber bundle-mass unit honeycomb fabric sound-absorbing material of the present application comprises:

[0007] (1) hollow polyester yarns are subjected to organization design, warping, threading, shedding, weft insertion, beating-up, winding and let-off processes to obtain a hollow polyester honeycomb fabric;

[0008] (2) the honeycomb fabric is placed on the lower plate of an electrostatic flocking device, the fiber bundle is vertically planted into the protruding part of the honeycomb on the surface of the fabric by electrostatic flocking, the fiber at the position without adhesive is blown off by an electrothermal air blowing device, and after the adhesive is dried, a fiber bundle-containing honeycomb fabric is obtained;

[0009] (3) the film and the mass block are combined to form a mass by adhesive, and the mass is adhered to the top end of the fiber bundle by adhesive to obtain a fiber bundle-mass unit-containing honeycomb fabric sound-absorbing material.

[0010] The present application combines the multiple scattering of the internal porous, concave-convex surface of the honeycomb fabric and the resonant sound absorption of the fiber bundle-mass unit, and based on the organization design of the honeycomb fabric, a honeycomb fabric is obtained by weaving, and then a fiber bundle-mass unit-containing honeycomb fabric sound-absorbing material is obtained by electrostatic flocking technology. Therefore, the fiber bundle-mass unit-containing honeycomb fabric sound-absorbing material is developed.

[0011] Advantages

[0012] (1) the sound-absorbing performance of the fabric sound-absorbing material prepared by the present application is excellent, the average sound absorption coefficient in the frequency range of 500-1800 Hz is 0.692, and the maximum sound absorption coefficient can reach 0.95; the sound absorption frequency band of the sound-absorbing material prepared by the present application is wide, and the sound absorption coefficient in the frequency range of 600-1800 Hz is greater than 0.4; (2) the sound-absorbing material prepared by the present application is soft, has a wide sound absorption frequency band and high noise reduction efficiency, the preparation method is simple, economic benefits are good, and it is suitable for industrial production. Attached Figure Description

[0013] Figure 1 The sound absorption coefficient curves of honeycomb fabric sound-absorbing materials containing fiber bundles and mass units are compared with those of honeycomb fabric, honeycomb fabric containing fiber bundles, and honeycomb fabric containing fiber bundles and film. During the sound absorption measurement, a 2cm air cavity was set behind all materials. Detailed Implementation

[0014] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0015] Example 1

[0016] Hollow polyester yarn is processed through weave design, warping, threading, shedding, weft insertion, beat-up, winding, and feeding to obtain hollow polyester honeycomb fabric. The honeycomb fabric is placed on the lower plate of an electrostatic flocking device, and through the electrostatic flocking process, wool fiber bundles are vertically implanted into the raised parts of the honeycomb on the fabric surface. An electric heating blower removes fibers from areas without adhesive. After the adhesive dries, a honeycomb fabric containing fiber bundles is obtained. A PE film and an iron block are bonded together using an adhesive to form a mass, which is then adhered to the top of the fiber bundle using adhesive, resulting in a honeycomb fabric sound-absorbing material containing fiber bundle-mass units. The number of fiber bundle-mass units is one, the fiber bundle length is 2.5 mm, the film thickness is 0.05 mm, the mass block mass is 0.37 g, the honeycomb fabric thickness is 0.25 mm, and the basis weight is 454 g / m². 2 .

[0017] Example 2

[0018] Hollow polyester yarn is processed through weave design, warping, threading, shedding, weft insertion, beat-up, winding, and feeding to obtain hollow polyester honeycomb fabric. The honeycomb fabric is placed on the lower plate of an electrostatic flocking device, and through the electrostatic flocking process, wool fiber bundles are vertically implanted into the raised parts of the honeycomb on the fabric surface. An electric heating blower removes fibers from areas without adhesive. After the adhesive dries, a honeycomb fabric containing fiber bundles is obtained. A PE film is then adhered to the top of the fiber bundles using an adhesive, resulting in a sound-absorbing material consisting of a fiber bundle-film honeycomb fabric. The fiber bundle-film unit consists of one unit, with a fiber bundle length of 2.2 mm, a film thickness of 0.05 mm, a honeycomb fabric thickness of 0.23 mm, and a basis weight of 450 g / m². 2 .

[0019] Example 3

[0020] The hollow polyester yarn is subjected to the processes of weave design, warping, threading, shedding, weft insertion, beating-up, take-up and let-off to obtain a hollow polyester honeycomb fabric; the honeycomb fabric is placed on the lower plate of an electrostatic flocking device, and wool fiber bundles are vertically planted into the protruding parts of the honeycomb on the surface of the fabric through the electrostatic flocking process; the fibers at the adhesive-free positions are blown off through the electrothermal air blowing device; after the adhesive is dried, the fiber bundle-containing honeycomb fabric sound-absorbing material is obtained. The number of fiber bundles is 1, the length of the fiber bundle is 2.3 mm, the thickness of the honeycomb fabric is 0.24 mm, and the grammage is 460 g / m 2 .

[0021] Comparative Example 1

[0022] The hollow polyester yarn is subjected to the processes of weave design, warping, threading, shedding, weft insertion, beating-up, take-up and let-off to obtain a hollow polyester honeycomb fabric. The thickness of the honeycomb fabric is 0.24 mm, and the grammage is 458 g / m 2 .

[0023] Compared with the honeycomb fabric, the fiber bundle-containing, fiber bundle-thin film-containing and fiber bundle-mass-containing honeycomb fabric sound-absorbing materials have wider sound absorption frequency bands and higher noise reduction efficiency, indicating that the resonance unit helps to improve the sound absorption performance of the fabric material; compared with the fiber bundle-containing and fiber bundle-thin film-containing honeycomb fabrics, the fiber bundle-mass-containing honeycomb fabric has a wider sound absorption bandwidth and higher noise reduction efficiency, indicating that the fiber bundle-mass unit is more conducive to improving the sound absorption performance of the fabric material.

Claims

1. A sound-absorbing material containing fiber bundle-mass unit honeycomb fabric, characterized in that: The fabric sound-absorbing material consists of fiber bundle-mass units and a honeycomb weave. The fiber bundles are bonded to the honeycomb protrusions on the fabric surface via electrostatic flocking, and the masses are bonded to the tips of the fiber bundles via adhesive. Each fiber bundle-mass unit comprises a fiber bundle and a mass unit, which is formed by bonding a film and a mass block. The honeycomb weave is obtained from hollow polyester yarn. The film is a PE or PP plastic film, and the mass blocks are iron, aluminum, or rubber blocks. The number of fiber bundle-mass units is 1–5, the length of the fiber bundle is 1–5 mm, the fibers within the fiber bundle are wool or spandex / hollow polyester blend fibers, the film thickness is 0.05–0.1 mm, the mass block mass is 0.3–1.5 g, and the honeycomb weave weight is 400–500 g / m². 2 .

2. The preparation method of the above-mentioned sound-absorbing material containing fiber bundle-mass unit honeycomb fabric includes: (1) Hollow polyester yarn is processed through weaving design, warping, threading, opening, weft insertion, weft beat-up, winding and feeding processes to obtain hollow polyester honeycomb fabric; (2) Place the honeycomb fabric on the lower electrode plate of the electrostatic flocking equipment. Through the electrostatic flocking process, the fiber bundles are vertically implanted into the raised parts of the honeycomb on the surface of the fabric. The fibers in the unadhesive positions are blown off by the electric heating blower. After the adhesive dries, the honeycomb fabric containing fiber bundles is obtained. (3) Use an adhesive to combine the film and the mass block to form a mass, and then attach the mass to the top of the fiber bundle with an adhesive to obtain a honeycomb fabric sound-absorbing material containing fiber bundle-mass unit.

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