CN103761961A - Sound absorbing and insulating composite material of interlayer structure and preparation method - Google Patents
Sound absorbing and insulating composite material of interlayer structure and preparation method Download PDFInfo
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- CN103761961A CN103761961A CN201310677753.1A CN201310677753A CN103761961A CN 103761961 A CN103761961 A CN 103761961A CN 201310677753 A CN201310677753 A CN 201310677753A CN 103761961 A CN103761961 A CN 103761961A
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- sound absorption
- sandwich construction
- compound substance
- insulation compound
- sound
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- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention relates to a sound absorbing and insulating composite material of an interlayer structure and a preparation method. The method comprises the following process steps that two surfaces of sound absorbing foam with the thickness ranging from 20 mm to 40 mm are respectively coated with a polyurethane adhesive with the thickness ranging from 0.05 mm to 0.2 mm, the sound absorbing foam is placed between two layers of sound insulating damping material with the thickness ranging from 0.8 mm to 2 mm, then hot-pressing combination is conducted, the hot-pressing combination temperature ranges from 30 DEG C to 80 DEG C, combination pressure ranges from 1 MPa to 3 MPa, a semi-finished product of the sound absorbing and insulating composite material of the interlayer structure is obtained, trimming is conducted, the residual adhesive is removed, and cutting and packaging are conducted.
Description
Technical field
The present invention relates to technical field of polymer composite materials, relate in particular to a kind of sound absorption and insulation compound substance and preparation method of sandwich construction.
Background technology
There is no in the market the sound insulation acoustic absorption composite material with sandwich construction, existing sound insulating material is mainly with foamed material, sound-insulating felt, the form that fibrofelt etc. are single is main, use function to exist with sound absorption or sound insulation simple function, when the form with wherein a kind of is used, only can realize sound absorption or sound insulation simple function, due to the diversity of audio frequency spectrum, a kind of material only can have good barrier or absorbability to the sound wave of certain band frequency wherein, when running into the sound wave identical with material resonant frequency, sound insulation or acoustically effective sharply decline, cause the comprehensive defening effect of material bad, there is certain defect in the engineering effort of actual use.
In order to reach better comprehensive defening effect, in actual noise control engineering, sound insulating material need to design for the frequency spectrum of noise, selects suitable material to carry out sound-absorbing and sound insulation processing, thereby realizes good comprehensive defening effect.Therefore when the selection of material, need to use the Material cladding of different resonant frequencies, thereby realize absorption maximum or obstruct to full rate section sound wave, could realize good comprehensive defening effect.
Sound absorption and insulation compound substance of the present invention, alternately compound by multilayer sound insulation acoustic absorbant, the Material cladding of different densities and acoustic characteristic, integrating sound absorption and insulation has sound wave is had to reflection, stop, block, damping weakens, make sound wave in transmittance process, repeatedly pass through the material layer of different densities, sound insulating material plays reflection and locking effect to sound wave, the play effect that absorb and slacken of acoustic absorbant to sound wave, through the repeatedly propagation at different interfaces, increase sound wave propagation difficulty, thereby reach repeatedly, cut off, weaken, the object of dissipation sound wave, improve the sound insulation efficiency of material, thereby realize good comprehensive sound insulation property.
Summary of the invention
Sound insulating material of the present invention adopts damping material, damping acoustic foam, damping material compound, and total is compound by which floor density different damping acoustic foam, damping material and fibrofelt/cloth, and each interlayer has obvious interface phenomena.Due to the difference of density between each layer, according to wave propagation principle, the sound wave of incident at interface by reflecting, scattering, transmission, refraction and diffraction, acoustic energy consumption, sees through strength ratio homogenous material little.On the other hand, when sound wave incides specimen surface, a part reflects on specimen surface, and a part sees through sample and continues to propagate forward, and a part absorbs sample internal communication.In sample, in communication process, sound wave causes the air movement in sample hole, rubs with hole wall, due to glutinousness and heat-conduction effect, changes acoustic energy into heat energy and dissipates.Damping acoustic foam base material is a kind of viscoelastic material, has larger damping capacity, is a kind of material with good sound absorption and antihunt action.Acoustic energy consumption is increased, reach defening effect.
The present invention compared with prior art has the following advantages:
(1) quality is lighter, and the material oise insulation factor of unit mass is larger;
(2) soft, can be curling, be convenient to transportation, can under varying environment condition, construct;
(3) easily cutting, can directly cut convenient construction at the construction field (site).
(4) wherein there is the reinforcement of fiber felt-cloth, high compared with general acoustics foamy body, not cracky.
(5) foam surface has sound-insulating felt to cover, and in use, foam voids is difficult for entering dust, causes sound absorbing capabilities to decline.
Preparation method:
By acoustic foam coated on both sides adhesive, be placed between two-layer sound insulation damping material, then carry out hot pressing compound, hot pressing combined temp is 30 ~ 80 ℃, and composite pressure is 1MPa ~ 3MPa, obtains sandwich construction sound absorption and insulation compound substance semi-manufacture, deburring, removes residual gum stick, cutting packing.
Material structure:
Middle layer depth of foam is 20 ~ 40mm.
The rubber of acoustic foam can select to adopt the better rubber expanded materials of damping and amortization such as chlorinated scoline, brombutyl according to the frequency spectrum of noise.
Tackifier can be selected the adhesives such as acrylic compounds, polyurethanes.
Damping material can adopt chlorinated scoline, brombutyl etc.
Adhesive glue layer thickness is 0.05 ~ 0.2mm.
Foam percentage of open area exceedes 80%, and aperture is 700 ~ 800 μ m.
Damping material thickness is 0.8 ~ 2mm.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is preparation flow figure of the present invention.
Fig. 2 is material structure figure of the present invention.
Reference numeral implication is as follows:
1: acoustic coating; 2: acoustic foam layer.
Embodiment
Below in conjunction with each embodiment, describe the present invention in detail.
Embodiment 1
By acoustic foam coated on both sides adhesive, be placed between two-layer sound insulation damping material, then carry out hot pressing compound, hot pressing combined temp is 70 ℃, and composite pressure is 1MPa, obtains sandwich construction sound absorption and insulation compound substance semi-manufacture, deburring, removes residual gum stick, cutting packing.
Material structure:
Middle layer depth of foam is 30mm.
The rubber of acoustic foam adopts brombutyl expanded material.
Tackifier can be selected acrylic compounds adhesive.
Damping material felt can adopt brombutyl etc.
Adhesive glue layer thickness is 0.15mm.
Foam percentage of open area exceedes 85%, and aperture is 750 μ m.
Damping material thickness is 1mm.
Claims (8)
1. a sound absorption and insulation compound substance for sandwich construction, it comprises
Rubbery foam layer;
Be compound in the adhesive on rubbery foam layer;
Be compound in the damping material on rubbery foam layer;
The sound absorption and insulation compound substance of sandwich construction according to claim 1, is characterized in that, rubbery foam percentage of open area 80%, and aperture is 700 ~ 900 μ m, depth of foam is 20 ~ 40mm.
2. the sound absorption and insulation compound substance of sandwich construction according to claim 1, is characterized in that, the material of rubbery foam is chlorinated scoline, brombutyl, thiokol.
3. the sound absorption and insulation compound substance of sandwich construction according to claim 1, is characterized in that, described tackifier is acrylic compounds, polyurethanes adhesive.
4. the sound absorption and insulation compound substance of sandwich construction according to claim 1, is characterized in that, described adhesive glue layer thickness is 0.1 ~ 0.2mm.
5. the sound absorption and insulation compound substance of sandwich construction according to claim 1, is characterized in that, described damping material can adopt chlorinated scoline, brombutyl, thiokol, and described damping material thickness is 0.8 ~ 2mm.
6. a preparation method for the sound absorption and insulation compound substance of sandwich construction, comprises the following steps:
By rubbery foam coated on both sides adhesive, be placed between two-layer damping material, then carry out hot pressing compound, obtain the sound absorption and insulation compound substance semi-manufacture of sandwich construction.
7. deburring, cutting, packed products.
8. the preparation method of the sound absorption and insulation compound substance of sandwich construction according to claim 7, is characterized in that, hot pressing combined temp is 30 ~ 80 ℃, and composite pressure is 1MPa ~ 3MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310677753.1A CN103761961A (en) | 2013-12-13 | 2013-12-13 | Sound absorbing and insulating composite material of interlayer structure and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310677753.1A CN103761961A (en) | 2013-12-13 | 2013-12-13 | Sound absorbing and insulating composite material of interlayer structure and preparation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103761961A true CN103761961A (en) | 2014-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310677753.1A Pending CN103761961A (en) | 2013-12-13 | 2013-12-13 | Sound absorbing and insulating composite material of interlayer structure and preparation method |
Country Status (1)
| Country | Link |
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| CN (1) | CN103761961A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105037978A (en) * | 2015-05-29 | 2015-11-11 | 苏州市湘园特种精细化工有限公司 | Low-protein sound-absorbing rubber and preparation method thereof |
| CN105109122A (en) * | 2015-09-18 | 2015-12-02 | 贵州大学 | Viscoelasticity composite sound insulating board |
| CN113202198A (en) * | 2021-05-31 | 2021-08-03 | 李德良 | Novel rubber-plastic sound-proof felt and manufacturing process thereof |
-
2013
- 2013-12-13 CN CN201310677753.1A patent/CN103761961A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105037978A (en) * | 2015-05-29 | 2015-11-11 | 苏州市湘园特种精细化工有限公司 | Low-protein sound-absorbing rubber and preparation method thereof |
| CN105109122A (en) * | 2015-09-18 | 2015-12-02 | 贵州大学 | Viscoelasticity composite sound insulating board |
| CN113202198A (en) * | 2021-05-31 | 2021-08-03 | 李德良 | Novel rubber-plastic sound-proof felt and manufacturing process thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140430 |
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| WD01 | Invention patent application deemed withdrawn after publication |