CN208006880U - A kind of composite sound-absorbing material - Google Patents
A kind of composite sound-absorbing material Download PDFInfo
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- CN208006880U CN208006880U CN201820253809.9U CN201820253809U CN208006880U CN 208006880 U CN208006880 U CN 208006880U CN 201820253809 U CN201820253809 U CN 201820253809U CN 208006880 U CN208006880 U CN 208006880U
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- 239000011358 absorbing material Substances 0.000 title claims abstract description 51
- 239000002131 composite material Substances 0.000 title claims abstract description 48
- 239000000835 fiber Substances 0.000 claims abstract description 98
- 239000006260 foam Substances 0.000 claims abstract description 46
- 239000011324 bead Substances 0.000 claims abstract description 40
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 26
- 239000004743 Polypropylene Substances 0.000 claims description 8
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 8
- 229920000742 Cotton Polymers 0.000 claims description 7
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 6
- -1 polypropylene Polymers 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 3
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 3
- 241001330002 Bambuseae Species 0.000 claims description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 3
- 229920006231 aramid fiber Polymers 0.000 claims description 3
- 239000011425 bamboo Substances 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 241000124033 Salix Species 0.000 claims description 2
- 229920002334 Spandex Polymers 0.000 claims description 2
- 229920004933 Terylene® Polymers 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- 229920002635 polyurethane Polymers 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 claims description 2
- 239000004759 spandex Substances 0.000 claims description 2
- 229920000877 Melamine resin Polymers 0.000 claims 1
- IWLBIFVMPLUHLK-UHFFFAOYSA-N azane;formaldehyde Chemical compound N.O=C IWLBIFVMPLUHLK-UHFFFAOYSA-N 0.000 claims 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims 1
- 238000009987 spinning Methods 0.000 claims 1
- 238000002360 preparation method Methods 0.000 abstract description 9
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000009472 formulation Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 229920001169 thermoplastic Polymers 0.000 abstract description 2
- 239000004416 thermosoftening plastic Substances 0.000 abstract description 2
- 238000007664 blowing Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 239000004033 plastic Substances 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 6
- WSFSSNUMVMOOMR-UHFFFAOYSA-N formaldehyde Substances O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 239000011490 mineral wool Substances 0.000 description 3
- 229920005830 Polyurethane Foam Polymers 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000011496 polyurethane foam Substances 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 241000282373 Panthera pardus Species 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000010358 mechanical oscillation Effects 0.000 description 1
- 239000000693 micelle Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The utility model discloses a kind of composite sound-absorbing materials.The composite sound-absorbing material includes the foam beads at least one aperture, and foam beads are bonded together by composite fibre, and the fusing point of the outer layer fiber of the composite fibre is lower than the fusing point of interior core fibre.The utility model had not only had the advantages that the well-insulated of sound-absorbing material fiber, but also had the advantages that foam beads light weight；Can produce as needed absorb different formulations, shape sound-absorbing material, and preparation process is simple；Waste material can by thermoplastic, compacting and etc. reuse, save raw material, and it is pollution-free.
Description
Technical field
The utility model is related to a kind of composite sound-absorbing material more particularly to a kind of composite sound-absorbing materials for automotive trim
And its preparation process, belong to technical field of composite materials.
Background technology
Sound-absorbing material (sound-absorbing material)：Any material can absorb sound, and only degree of absorption is very different.It is logical
It is often the material that will be more than 0.2 to the average sound absorption coefficient of above-mentioned six frequencies, is classified as sound-absorbing material.Sound-absorbing material (sound absorption material
Material) it is mostly loose porous material, such as mineral wool, blanket, sound absorbing mechanism is the hole that sound wave gos deep into material, and hole
The mostly internal open pore to interpenetrate, by air molecule friction and viscosity resistance, and makes fiber fines make mechanical oscillation,
To make acoustic energy be changed into thermal energy.The acoustic absorptivity of this kind of porous sound-absorbing material generally gradually increases from low to high, therefore
It is preferable to the sound absorbing effects of high frequency and intermediate frequency.
Sound-absorbing material generally mainly has fiber-like, foam class and particulate species three categories type.
Fiber-like is broadly divided into two kinds of inorfil and organic fiber.Inorfil mainly has sound-proof material, glass fiber, slag
Cotton, rock wool and its product etc..Glass fiber can be fabricated to various glass fiber felts.Sound-proof material is divided into short cotton, ultra-fine cotton and intermediate fiber
Three kinds.Sound-proof material is most common sound-absorbing material, have it is non-ignitable, it is heat-resisting, it is corrosion-resistant the advantages that.The sound insulation handled by silicone oil
Cotton has the features such as fire prevention, moisture-proof.Rock wool is a kind of new sound-absorbing material, and heat-insulated, high temperature resistant is easily processed into type.
The characteristics of foam class sound-absorbing material is that volume density is small, and thermal coefficient is small, and quality is soft, the disadvantage is that it is easy to aging, it is resistance to
Fire is poor.
The characteristics of particulate species sound-absorbing material is leopard line, moisture-proof, heat-resisting, it is corrosion-resistant the advantages that.
In order to absorb the sound of different frequency, occur composite sound-absorbing material, existing automobile composite sound-absorbing on the market
Material is mostly the lamination layer structure that the baffle blanket as shown in Figure 1 by a variety of unlike materials combines, and the structural thickness is limited,
It is unfavorable for that stereochemical structure is made, and when thickness is larger, weight is consequently increased.Recently, also a kind of sound-absorbing material, such as
Shown in Fig. 2, glue spraying is carried out to foam beads, it is made to bond together.The plurality of specifications of different-grain diameter can be used in foam beads, should
The characteristics of kind sound-absorbing material is that gap is similarly formed between foam beads, micelle, and sound-absorbing effect is more preferable, can also cut into difference
Shape is to meet different production requirements.But such sound-absorbing material has a defect that：It must be made than required shape bigger
Volume, to cut, the clout cut down causes the waste of material, and the foam beads after glue spraying can not regenerate, and the solvent of glue
Volatilization can have environment the advantages of polluting, the utilization of glue also affects foam sound-absorbing material light weight.
Utility model content
Problem to be solved in the utility model, which is existing composite sound-absorbing material sound-absorbing effect and light weight, to get both
Problem and when being used to absorb different frequency using different pore size of existing foam sound-absorbing material, the uncontrollable problem in aperture.
To solve the above-mentioned problems, the utility model provides a kind of composite sound-absorbing material, which is characterized in that including at least
A kind of foam beads in aperture, foam beads are bonded together by composite fibre, and the outer layer fiber of the composite fibre melts
Point is lower than the fusing point of interior core fibre.
Preferably, the weight ratio of the foam beads and composite fibre is 0.1~5: 1.
Preferably, the material of the foam beads is the one of which or several mixed in melamino-formaldehyde and polyurethane
Close object.
Preferably, the outer layer fiber, interior core fibre material be PET or PP.
Preferably, the fusing point of the outer layer fiber of the composite fibre is 5 DEG C at least lower than the fusing point of interior core fibre.
Preferably, further include natural fiber, chemical fibre and spin any one or a few in felt broken material, and it is compound
The weight ratio of fiber is 0.1~1: 1.
It is highly preferred that the natural fiber be bamboo fibre, flaxen fiber, cotton fiber and willow fiber in any one or it is several
Kind；Chemical fibre is any one or a few in polypropylene fibre, terylene, aramid fiber and spandex.
Preferably, when using the foam beads of two or more different pore sizes, the smaller foam beads of grain size are filled in hole
In the aperture of the larger foam beads of diameter.
Fibre diameter is thicker, and the frequency for absorbing audio is higher, and fibre diameter is thinner, and the frequency for absorbing audio is lower；Foam
The aperture of material is bigger, and the frequency for absorbing audio is higher, and the aperture of foamed material is smaller, and the frequency for absorbing audio is lower.This reality
It can arbitrarily be combined according to above-mentioned rule with novel, have reached the frequency range for accurately controlling the audio that need be absorbed.
Compared with prior art, the beneficial effects of the utility model are：
1, not only had the advantages that the well-insulated of sound-absorbing material fiber, but also had the advantages that foam beads light weight；
2, can produce as needed absorb different formulations, shape sound-absorbing material, and preparation process is simple；
3, the sound-absorbing material materials of same volume are less；
4, waste material can by thermoplastic, compacting and etc. reuse, save raw material, and it is pollution-free.
Description of the drawings
Fig. 1 is the structural schematic diagram of existing automobile composite sound-absorbing material；
Fig. 2 is the structural schematic diagram of sound-absorbing material；
Fig. 3 is the structural schematic diagram of composite sound-absorbing material provided by the utility model；
Fig. 4 is the structural schematic diagram of different pore size foam beads；
Fig. 5 is the datagram of the acoustic absorptivity of sound-absorbing material made from embodiment 6.
Specific implementation mode
To make the utility model be clearer and more comprehensible, hereby with preferred embodiment, and attached drawing is coordinated to be described in detail below.
Embodiment 1
A kind of preparation process of composite sound-absorbing material：
By foam beads 1 (melamino-formaldehyde foamed plastics broken material) and composite fibre 2 (outer layer fiber and interior core fibre
It is PET, and the fusing point of outer layer fiber is 5 DEG C lower than inner fiber) it is put into metal mold so that the ratio of weight ratio 0.1: 1 is uniformly mixed
After tool, to outer mold wall blowing hot-air, mold is heated to the fusing point of outer layer fiber, outer layer fiber is made to melt postcooling to room temperature,
Foam beads 1 bond together immediately.
Composite sound-absorbing material obtained above is as shown in figure 3, foam beads 1 are bonded together by composite fibre 2, grain size
Smaller foam beads 1-2 is filled in the aperture of the larger foam beads 1-1 in aperture, as shown in Figure 4.
Embodiment 2
A kind of preparation process of composite sound-absorbing material：
By foam beads 1 (polyurethane foam plastics broken material), (outer layer fiber and interior core fibre are with composite fibre 2
PP, and the fusing point of outer layer fiber is 8 DEG C lower than inner fiber) be uniformly mixed with the ratio of weight ratio 5: 1 and be put into metal die after, it is right
Mold is heated to the fusing point of outer layer fiber by outer mold wall blowing hot-air, and outer layer fiber is made to melt postcooling to room temperature, foam beads
1 bonds together immediately.
Embodiment 3
A kind of preparation process of composite sound-absorbing material：
By foam beads 1 (melamino-formaldehyde foamed plastics broken material) and composite fibre 2 (outer layer fiber PP, inner core
Fiber is PET, and the fusing point of outer layer fiber is 10 DEG C lower than inner fiber), bamboo fibre with the ratio of weight ratio 1: 2: 2 be uniformly mixed
After being put into metal die, to outer mold wall blowing hot-air, mold is heated to the fusing point of outer layer fiber, it is cold after so that outer layer fiber is melted
But to room temperature, foam beads 1 bond together immediately.
Embodiment 4
A kind of preparation process of composite sound-absorbing material：
By foam beads 1 (melamino-formaldehyde foamed plastics broken material) and composite fibre 2 (outer layer fiber and interior core fibre
Be PET, and the fusing point of outer layer fiber is 5 DEG C higher than inner fiber), flaxen fiber, polypropylene fiber is with the ratio of weight ratio 1: 1: 1: 1
It is uniformly mixed after being put into metal die, to outer mold wall blowing hot-air, mold is heated to the fusing point of outer layer fiber, makes outer layer fiber
Postcooling is melted to room temperature, foam beads 1 bond together immediately.
Embodiment 5
A kind of preparation process of composite sound-absorbing material：
By foam beads 1 (melamino-formaldehyde foamed plastics broken material) and composite fibre 2 (outer layer fiber and interior core fibre
Be PET, and the fusing point of outer layer fiber is 5 DEG C lower than inner fiber), polyester fiber with the ratio of weight ratio 1: 1: 1 be uniformly mixed
After being put into metal die, to outer mold wall blowing hot-air, mold is heated to the fusing point of outer layer fiber, it is cold after so that outer layer fiber is melted
But to room temperature, foam beads 1 bond together immediately.
Composite sound-absorbing material obtained above is as shown in figure 3, foam beads 1 are bonded together by composite fibre 2, grain size
Smaller foam beads 1-2 is filled in the aperture of the larger foam beads 1-1 in aperture, as shown in Figure 4.
Embodiment 6
A kind of preparation process of composite sound-absorbing material：
By foam beads 1 (polyurethane foam plastics broken material), (outer layer fiber and interior core fibre are with composite fibre 2
PP, and the fusing point of outer layer fiber is 8 DEG C lower than inner fiber), cotton fiber, aramid fiber mix with the ratio of weight ratio 2: 1: 1: 2
After being uniformly put into metal die, to outer mold wall blowing hot-air, mold is heated to the fusing point of outer layer fiber, outer layer fiber is made to melt
Postcooling to room temperature, foam beads 1 bond together immediately.
Different-thickness is made in sound-absorbing material made from the present embodiment and carries out sound absorption test, test result is as shown in Figure 5.Figure
In, abscissa is frequency (unit：Hz), ordinate is acoustic absorptivity, and the numerical value on every data line is the thickness of sound-absorbing material.
Claims (8)
1. a kind of composite sound-absorbing material, which is characterized in that the foam beads (1) including at least one aperture, foam beads (1) are logical
It crosses composite fibre (2) to bond together, the fusing point of the outer layer fiber of the composite fibre (2) is lower than the fusing point of interior core fibre.
2. composite sound-absorbing material as described in claim 1, which is characterized in that the foam beads (1) and composite fibre (2)
Weight ratio is 0.1~5: 1.
3. composite sound-absorbing material as described in claim 1, which is characterized in that the material of the foam beads (1) is melamine
One of which in amine formaldehyde and polyurethane or several mixtures.
4. composite sound-absorbing material as described in claim 1, which is characterized in that the outer layer fiber, interior core fibre material be
PET or PP.
5. composite sound-absorbing material as described in claim 1, which is characterized in that the outer layer fiber of the composite fibre (2) melts
Point is 5 DEG C at least lower than the fusing point of interior core fibre.
6. composite sound-absorbing material as described in claim 1, which is characterized in that further include natural fiber, chemical fibre and spinning felt
Any one or a few in broken material, the weight ratio with composite fibre are 0.1~1: 1.
7. composite sound-absorbing material as claimed in claim 6, which is characterized in that the natural fiber is bamboo fibre, flaxen fiber, cotton
Any one or a few in fiber and willow fiber；Chemical fibre be polypropylene fibre, terylene, aramid fiber and spandex in any one or it is several
Kind.
8. composite sound-absorbing material as described in claim 1, which is characterized in that when the foam using two or more different pore sizes
When grain (1), the smaller foam beads of grain size are filled in the aperture of the larger foam beads in aperture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820253809.9U CN208006880U (en) | 2018-02-12 | 2018-02-12 | A kind of composite sound-absorbing material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820253809.9U CN208006880U (en) | 2018-02-12 | 2018-02-12 | A kind of composite sound-absorbing material |
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| Publication Number | Publication Date |
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| CN208006880U true CN208006880U (en) | 2018-10-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108312983A (en) * | 2018-02-12 | 2018-07-24 | 上海东杰高分子材料有限公司 | A kind of composite sound-absorbing material and its preparation process |
| CN116438340A (en) * | 2020-10-29 | 2023-07-14 | 三菱电机株式会社 | Sound absorbing material |
-
2018
- 2018-02-12 CN CN201820253809.9U patent/CN208006880U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108312983A (en) * | 2018-02-12 | 2018-07-24 | 上海东杰高分子材料有限公司 | A kind of composite sound-absorbing material and its preparation process |
| CN116438340A (en) * | 2020-10-29 | 2023-07-14 | 三菱电机株式会社 | Sound absorbing material |
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