CN101625856A - Multifrequency sound absorption foam faced material and preparation method thereof - Google Patents
Multifrequency sound absorption foam faced material and preparation method thereof Download PDFInfo
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- CN101625856A CN101625856A CN200910055971A CN200910055971A CN101625856A CN 101625856 A CN101625856 A CN 101625856A CN 200910055971 A CN200910055971 A CN 200910055971A CN 200910055971 A CN200910055971 A CN 200910055971A CN 101625856 A CN101625856 A CN 101625856A
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Abstract
The invention relates to a multifrequency sound absorption foam faced material and a preparation method thereof, belonging to the technical field of noise reduction and sound absorption. The multifrequency sound absorption foam faced material comprises a foam plastic layer, a coating layer and a plastic laminated layer, wherein the foaming plastic layer is an intermediate layer and the two sides thereof are respectively bonded with the coating layer and a bonding plastic layer; the thickness of the foam plastic is 1mm to 100mm, the thickness of the coating layer is 0.01mum to 1mum and the thickness of the plastic layer is 0.01mm to 100mm. The multifrequency sound absorption foam faced material has the average sound absorption coefficient of being 0.7 under the frequency of 250 to 1000Hz, and has good sound absorption effect.
Description
Technical field
What the present invention relates to is the material in a kind of noise reduction sound absorption technique field and preparation method thereof, specifically is a kind of multifrequency sound absorption foam faced material and preparation method thereof.
Background technology
Acoustic absorbant is by the structural classification of material itself: can be divided into porous sound-absorbing material and resonance sound-absorbing material two classes.In general, porous sound-absorbing material is to absorb middle and high frequency acoustic energy, and resonance sound-absorbing structure then mainly absorbs low frequency acoustic energy.The main structural attitude of sound-absorbing porous material is that material all has the micropore that is interconnected from the surface to inside.The main sound absorbing mechanism of acoustic absorbant is the air vibration that has excited micropore inside when sound wave incides porosint surperficial, produce relative motion between air and solid grain, because the glutinousness of air produces corresponding viscosity resistance in micropore, make the kinetic energy of vibrate air constantly be converted into heat energy, make acoustic energy be attenuated; When air adiabatic compresses, heat interchange taking place constantly between air and the hole wall in addition, also can make acoustic energy be converted into heat energy, thereby be attenuated.From above-mentioned sound absorbing mechanism as can be seen, porous sound-absorbing material must possess following condition: 1. material internal should have a large amount of micropores or gap, and hole should be tried one's best tiny and is evenly distributed; 2. the micropore of material internal must be outwardly open, that is to say the surface that must lead to material, makes sound wave can easily enter into the inside of material from material surface; 3. the micropore of material internal must be interconnected, and can not seal.
When sound wave incided material surface, part acoustic energy will be by absorbed, and the acoustic energy that makes reflection is less than incident acoustic energy, and this is the sound absorption of material, and the size of material acoustical absorptivity all uses acoustical absorption coefficient (α, (0～1)) to characterize.Strictness says that any material all has sound absorption to a certain degree, and so-called acoustic absorbant is meant that those have sizable sound absorbing capabilities, the special material of handling as sound absorption, generally acoustical absorption coefficient α is called acoustic absorbant greater than 0.3 material.The sound absorption characteristics of sound-absorbing porous material are that the acoustical absorption coefficient that increases along with frequency increases gradually, this means that low frequency absorbs and do not have high frequency absorption good.Film or thin plate and other structures also can absorb sound when forming cavity, and as plank, sheet metal etc., the sound absorbing mechanism of this structure is thin plate resonance, on resonant frequency, absorbs acoustic energy in a large number owing to the thin plate high vibration.The thin plate resonance absorption has sound absorbing capabilities preferably at low frequency mostly.
Find through retrieval prior art, the patent disclosure of Granted publication CN2869014Y a kind of foamed polyurethane acoustic absorbant of single-sided lamination polyurethane elastomer, but the sound absorption efficiency of the foamed material of this single face card layer is not high, particularly the acoustical absorption coefficient at low frequency is lower, can not satisfy the requirement of multifrequency and efficient sound absorption.
Summary of the invention
The present invention is directed to the prior art above shortcomings, a kind of multifrequency sound absorption foam faced material and preparation method thereof is provided, be applied to the indoor wall sound absorption and handle or the instrument and equipment noise reduction process.
The present invention is achieved by the following technical solutions:
The multifrequency sound absorption foam faced material that the present invention relates to comprises: foam layer, dope layer and plastic tab layer, wherein: foam layer is the middle layer, the two sides is bonding dope layer and stickup plastic layer respectively, the thickness of this polyfoam is 1mm～100mm, the thickness of dope layer is 0.01um～1um, and the thickness of plastic layer is 0.01mm～100mm.
Described foam layer is made by the foamed polyurethane after flame treatment, foamed polyvinyl chloride, foam vinylidene chloride or foam acetate ethylene copolymer, preferably through the foamed polyurethane or the foam acetate ethylene copolymer of flame treatment.
Described foam layer has the hole that some apertures are 0.1～5mm.
Described dope layer is the water paint of polyurethane, organosilicon, acrylate, Vingon or acetate ethylene copolymer resin.
Described plastic tab is tygon, polypropylene, Polyvinylchloride or nylon, and hardness is 50～90D, and thickness is 0.01～100mm.
The preparation method of the multifrequency sound absorption foam faced material that the present invention relates to may further comprise the steps:
The first step, choose foamed material, then foamed material is cut into the foam layer of thickness 1mm～100mm;
It is the hole of 0.1～5mm that described foamed material has some apertures that obtain by foaming.
The one side applied thickness of second step, foam layer is the water paint of the polyurethane of 0.01um～500um, organosilicon, acrylate, Vingon or acetate ethylene copolymer resin, and pasting thickness at the another side of polyfoam is tygon, polypropylene, Polyvinylchloride or the nylon of 0.01mm～10mm.
Described tygon, polypropylene, Polyvinylchloride or nylon hardness are 50～90D.
The present invention prepares the average sound absorption coefficient of gained multifrequency sound absorption foam faced material under 250～1000Hz frequency and reaches 0.7, has good acoustically effective.
Embodiment
Below embodiments of the invention are elaborated, present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Two-sided uncoated coating of the thick foamed polyurethane of Comparative Examples 1: 8mm or applying plastics paste layer.
The thick foamed polyurethane double-coated of embodiment 1 preparation 8mm organosilicon water paint specifically may further comprise the steps:
The first step, choose foamed material, then foamed material is cut into the foam layer of thickness 8mm.
The double-coated thickness of second step, foam layer is the organosilicon water paint of 200um.
The thick foamed polyurethane single face coating of embodiment 2 preparation 8mm organosilicon water paint, another side pastes the PVC plastic tab, specifically may further comprise the steps:
The first step, choose foamed material, then foamed material is cut into the foam layer of thickness 8mm
The one side applied thickness of second step, foam layer is the organosilicon water paint of 20um, and pasting hardness at the another side of polyfoam is 70D, and thickness is the PVC plastic tab of 1mm.
Be coated with the charge level sound absorption and be 2-1; The sound absorption of PVC face is 2-2.
The two-sided subsides PVC of the embodiment 3 preparation thick foamed polyurethanes of 8mm plastic tab specifically may further comprise the steps:
The first step, choose foamed material, then foamed material is cut into the foam layer of thickness 8mm.
It is 70D that the one side of second step, foam layer is pasted hardness, and thickness is the PVC plastic tab of 1mm, and pasting hardness at the another side of polyfoam is 70D, and thickness is the PVC plastic tab of 3mm.
The sound absorption of 1mmPVC face is 3-1; The sound absorption of 3mmPVC face is 3-2.
The thick foamed polyurethane single face of embodiment 4 preparation 8mm pastes the PVC plastic tab, specifically may further comprise the steps:
The first step, choose foamed material, then foamed material is cut into the foam layer of thickness 8mm.
The uncoated coating or the applying plastics paste layer of second step, foam layer, pasting hardness at the another side of polyfoam is 70D, thickness is the PVC plastic tab of 1mm.
The sound absorption of PVC-free face is 4-1; The sound absorption of 1mmPVC face is 4-2.
Table 1
| ??AP/Hz | Comparative Examples 1 | Embodiment 1 | Embodiment 2-1 | Embodiment 2-2 | Embodiment 3-1 | Embodiment 3-2 | Embodiment 4-1 | Embodiment 4-2 |
| ??250 | ??0.18 | ??0.25 | ??0.22 | ??0.21 | ??0.24 | ??0.29 | ??0.2 | ??0.24 |
| ??500 | ??0.34 | ??0.41 | ??0.34 | ??0.46 | ??0.42 | ??0.38 | ??0.4 | ??0.35 |
| ??1000 | ??0.43 | ??0.68 | ??0.44 | ??0.75 | ??0.37 | ??0.46 | ??0.3 | ??0.52 |
From the result of table 1, use foamed polyurethane separately, possess certain acoustically effective (acoustical absorption coefficient is greater than 0.3) in the frequency range of 500Hz-1000Hz.And if behind its double-coated coating or laminating material thin slice, acoustical absorption coefficient in the frequency range of 250Hz-1000Hz all increases, particularly double-coated organosilicon coating and one side apply the organosilicon coating another side and paste two samples of PVC plastic tab with the sound absorption of PVC face, and the acoustical absorption coefficient when transmission frequency is 1000Hz brings up to 0.68 and 0.75 respectively.But all samples no matter with coating double-coated or PVC plastics paste layer, all can not make the acoustical absorption coefficient of 250Hz transmission frequency reach resultful 0.3.Therefore, will further test by the thickness of adjusting sample.
Two-sided uncoated coating of the thick foamed polyurethane of Comparative Examples 5:40mm or applying plastics paste layer.
The thick foamed polyurethane single face of embodiment 6 preparation 40mm polyurethane coating water paint specifically may further comprise the steps:
The first step, choose foamed material, then foamed material is cut into the foam layer of thickness 40mm.
The uncoated coating or the applying plastics paste layer of second step, foam layer are the polyurethane water-based paint of 20um in the another side applied thickness of polyfoam.
No coat side sound absorption is 6-1, has the coat side sound absorption to be 6-2.
The thick foamed polyurethane double-coated of embodiment 7 preparation 40mm polyurethane water-based paint specifically may further comprise the steps:
The first step, choose foamed material, then foamed material is cut into the foam layer of thickness 40mm.
The double-coated thickness of second step, foam layer is the polyurethane water-based paint of 20um.
The thick foamed polyurethane single face of embodiment 8 preparation 40mm polyurethane coating water paint, another side pastes the PVC plastic tab, specifically may further comprise the steps:
The first step, choose foamed material, then foamed material is cut into the foam layer of thickness 40mm.
The one side applied thickness of second step, foam layer is the polyurethane water-based paint of 20um, and pasting hardness at the another side of polyfoam is 70D, and thickness is the PVC plastic tab of 1mm.
Be coated with the charge level sound absorption and be 8-1; The sound absorption of PVC face is 8-2.
Table 2
| ??AP/Hz | Comparative Examples 5 | Embodiment 6-1 | Embodiment 6-2 | Embodiment 7 | Embodiment 8-1 | Embodiment 8-2 |
| ??250 | ??0.18 | ??0.17 | ??0.2 | ??0.47 | ??0.44 | ??0.43 |
| ??500 | ??0.22 | ??0.31 | ??0.85 | ??0.87 | ??0.49 | ??0.42 |
| ??1000 | ??0.5 | ??0.56 | ??0.75 | ??0.77 | ??0.85 | ??0.51 |
As can be seen from Table 2, the acoustical absorption coefficient of the thick foamed polyurethane of 40mm in the transmit frequency range of 250-1000Hz of the water paint of double-coated polyurethane or applying PVC plastic tab all has raising in various degree, the thick foamed polyurethane of the 40mm of the water paint of double-coated polyurethane (embodiment 7) particularly, average sound absorption coefficient under three transmission frequencies reaches 0.7, and good acoustically effective is arranged.
Claims (7)
1, a kind of multifrequency sound absorption foam faced material, it is characterized in that, comprise: foam layer, dope layer and plastic tab layer, wherein: foam layer is the middle layer, the two sides is bonding dope layer and stickup plastic layer respectively, the thickness of this polyfoam is 1mm～20mm, and the thickness of dope layer is 0.01um～1um, and the thickness of plastic layer is 0.01mm～100mm.
2, multifrequency sound absorption foam faced material according to claim 1, it is characterized in that, described foam layer is made by the foamed polyurethane after flame treatment, foamed polyvinyl chloride, foam vinylidene chloride or foam acetate ethylene copolymer, preferably through the foamed polyurethane or the foam acetate ethylene copolymer of flame treatment.
3, multifrequency sound absorption foam faced material according to claim 1 is characterized in that, described foam layer has the hole that some apertures are 0.1～5mm.
4, multifrequency sound absorption foam faced material according to claim 1 is characterized in that, described dope layer is the water paint of polyurethane, organosilicon, acrylate, Vingon or acetate ethylene copolymer resin.
5, multifrequency sound absorption foam faced material according to claim 1 is characterized in that, described plastic tab is tygon, polypropylene, Polyvinylchloride or nylon, and hardness is 50～90D, and thickness is 0.01～100mm.
6, a kind of preparation method of multifrequency sound absorption foam faced material according to claim 1 is characterized in that, may further comprise the steps:
The first step, choose foamed material, then foamed material is cut into the foam layer of thickness 1mm～100mm;
The one side applied thickness of second step, foam layer is the water paint of the polyurethane of 0.01um～1um, organosilicon, acrylate, Vingon or acetate ethylene copolymer resin, and pasting thickness at the another side of polyfoam is tygon, polypropylene, Polyvinylchloride or the nylon of 0.01mm～100mm.
7, the preparation method of multifrequency sound absorption foam faced material according to claim 6 is characterized in that, described tygon, polypropylene, Polyvinylchloride or nylon hardness are 50～90D.
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| CN2009100559715A CN101625856B (en) | 2009-08-06 | 2009-08-06 | Preparation method of multifrequency sound absorption foam faced material |
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| CN2009100559715A CN101625856B (en) | 2009-08-06 | 2009-08-06 | Preparation method of multifrequency sound absorption foam faced material |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102072514A (en) * | 2011-01-20 | 2011-05-25 | 宁波方太厨具有限公司 | Noise reducing method for range hood and low-noise range hood |
| CN104175622A (en) * | 2014-08-14 | 2014-12-03 | 上海华特汽车配件有限公司 | Porous noise reduction product and preparation method and use thereof |
| CN106494024A (en) * | 2016-10-20 | 2017-03-15 | 中电声韵声学工程技术(北京)有限公司 | A kind of composite sound-absorbing material and preparation method thereof and purposes |
| CN106679793A (en) * | 2017-02-22 | 2017-05-17 | 中国计量大学 | Novel pyroelectric sensor for detecting sound power |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2402902A (en) * | 2000-11-10 | 2002-05-21 | Nagoya Oilchemical | Interior material |
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2009
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102072514A (en) * | 2011-01-20 | 2011-05-25 | 宁波方太厨具有限公司 | Noise reducing method for range hood and low-noise range hood |
| CN104175622A (en) * | 2014-08-14 | 2014-12-03 | 上海华特汽车配件有限公司 | Porous noise reduction product and preparation method and use thereof |
| CN106494024A (en) * | 2016-10-20 | 2017-03-15 | 中电声韵声学工程技术(北京)有限公司 | A kind of composite sound-absorbing material and preparation method thereof and purposes |
| CN106494024B (en) * | 2016-10-20 | 2018-11-27 | 中电声韵声学工程技术(北京)有限公司 | A kind of composite sound-absorbing material and preparation method thereof and purposes |
| CN106679793A (en) * | 2017-02-22 | 2017-05-17 | 中国计量大学 | Novel pyroelectric sensor for detecting sound power |
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