CN105601984A - Sound absorbing material and preparation method thereof - Google Patents
Sound absorbing material and preparation method thereof Download PDFInfo
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- CN105601984A CN105601984A CN201610053519.5A CN201610053519A CN105601984A CN 105601984 A CN105601984 A CN 105601984A CN 201610053519 A CN201610053519 A CN 201610053519A CN 105601984 A CN105601984 A CN 105601984A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/36—After-treatment
- C08J9/40—Impregnation
- C08J9/42—Impregnation with macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/36—After-treatment
- C08J9/40—Impregnation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2325/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2325/02—Homopolymers or copolymers of hydrocarbons
- C08J2325/04—Homopolymers or copolymers of styrene
- C08J2325/06—Polystyrene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2425/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2425/02—Homopolymers or copolymers of hydrocarbons
- C08J2425/04—Homopolymers or copolymers of styrene
- C08J2425/08—Copolymers of styrene
- C08J2425/10—Copolymers of styrene with conjugated dienes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2433/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
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- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention provides a sound absorbing material. The sound absorbing material comprises a base material, porous powder and an adhesive film; a pored foaming material with a plurality of foaming holes is adopted as the base material, the foaming holes are filled with the porous powder, and the adhesive film is adhered to the base material to adhere the porous powder into the foaming holes. The sound absorbing material has the advantages of being uniform in hole channel, high in utilization rate of porous powder and good in sound absorbing effect and can effectively improve the bass effect of a sound generator after being filled into a sound cavity of the sound generator. The invention further provides a preparation method of the sound absorbing material.
Description
Technical field
The present invention relates to sound-absorbing material technical field, be specifically related to a kind of sound-absorbing material and preparation thereofMethod.
Background technology
In the process of the portable type electronic product fast developments such as mobile phone, user is to productFunctional Requirement is more and more stronger, and thus, the technical development of microphone device is corresponding quickening also, makes itAdapt with the function of electronic product. The microphone device of correlation technique, it comprises having cavityHousing and be installed on the acoustical generator unit on described housing. Because cavity is enclosed construction and cavityVolume is smaller, so the resonant frequency of microphone device is higher, causes the low frequency of microphone deviceCan be poor, be difficult to produce simple and honest bass effect.
Address this problem, a method the most direct is to increase sound chamber, but, acoustical generatorThe miniaturization development trend of part has limited again the size of microphone device, comes merely by enlarged cavitiesThe low frequency performance that improves microphone device is difficult to reality. In order to improve the poor technology of low frequency performanceProblem, generally adopts in the industry porous powder to make at present and is of a size of tens of extremely porous of thousands of micronsParticle is as sound-absorbing material, and the sound-absorbing material obtaining is placed in to sound chamber, realizes and reduces soundingThe low resonant frequency fo of device, improves the effect of bass.
But, in correlation technique, use in the process of porous preparation sound-absorbing material, conventionallyCan there is following problem:
(1) granule interior duct is difficult to control, and easily forms closed pore and solid section, seriousAffect the utilization rate of acoustically effective and porous powder;
(2) sound absorption particle has strict demand to size conventionally, and what in forming process, produce is largeMeasure excessive or cross granule all can have a strong impact on product yield;
(3) shaped granule needs extra adhesives and/or encapsulating material just can be positioned over soundChamber, can bring extra cost, and reduces the qualification rate of product.
Therefore, be necessary to provide a kind of new sound-absorbing material and preparation method thereof to solve above-mentioned technologyProblem.
Summary of the invention
The object of the invention is to overcome above-mentioned technical problem, provide a kind of duct evenly, periporateMaterial utilization rate is high, sound-absorbing effect good, thereby can effectively improve the sound absorber of acoustical generator bass effectMaterial and preparation method thereof.
Technical scheme of the present invention is:
A kind of sound-absorbing material, comprises base material, porous powder and gluing film, and described base material is for havingThe open cell type expanded material of several foam holes, described porous powder is filled in described foam holeIn, described gluing film adheres to described base material, and described porous powder is adhered to described foam holeIn.
Preferably, the aperture of described foam hole is 200-1000 μ m.
Preferably, described porous powder is Bio-sil material, molecular screen material, porous graphiteAny one in material and porous charcoal black-materials or multiple combination.
The present invention also provides a kind of preparation method of sound-absorbing material, comprises the steps:
Porous powder, adhesive and water are provided, described porous powder, adhesive and water are madeMixed slurry;
Base material is provided, and described base material is the open cell type expanded material with several foam holes,Under vacuum condition, described base material be impregnated in described mixed slurry;
Take out base material and dry, obtaining described sound-absorbing material.
Preferably, the proportioning of described porous powder, adhesive and water counts 100 by weight:(6-16)：(200-1000)。
Preferably, described porous powder is Bio-sil material, molecular screen material, porous graphiteAny one in material and porous charcoal black-materials or multiple combination.
Preferably, described adhesive be polystyrene emulsion, Polystyrene-acrylate emulsion,Polyacrylate dispersion, polyvinyl acetate-acrylic acid ester emulsion, Polybutadiene-styrene breastLiquid, EVA emulsion, polyvinyl alcohol water solution, PVPAqueous solvent, the polyacrylic acid aqueous solution, polyacrylamide solution, protein aqueous solution, modificationAny one in cellulose aqueous solution or soluble starch solution.
Preferably, the aperture of described foam hole is 200-1000 μ m.
Preferably, described base material is polyethylene, polypropylene, polystyrene, polyethylene-acetic acidAny one in vinyl acetate, polyurethane, Polybutadiene-styrene copolymer or polyvinyl chloride.
Preferably, the bake out temperature of described base material is 50-150 DEG C.
Compared with correlation technique, sound-absorbing material provided by the invention and preparation method thereof, have asLower beneficial effect:
One, sound-absorbing material provided by the invention, using open cell type expanded material as base material, porousPowder packed several foam holes in described open cell type expanded material, and by the glue formingDescribed porous powder is adhered to described base material by mucous membrane, due in described open cell type expanded materialFoam hole is interconnected, and therefore, the duct forming in sound-absorbing material is even, and is perforate,Thereby significantly improve the sound-absorbing effect of sound-absorbing material, and improved the utilization of described porous powderRate. Sound-absorbing material of the present invention is filled in the sound chamber of acoustical generator, can effectively improves acoustical generatorLow frequency performance.
Two, sound-absorbing material provided by the invention, by base material be impregnated in described porous powder withIn the slurry that described adhesive is made, make described porous powder uniform filling sending out in described base materialIn abscess, and the voluminous powder even particle size forming, described porous powder utilization rate is high,The sound-absorbing material product percent of pass obtaining is high, and production cost is low.
Three, sound-absorbing material provided by the invention, in preparation technology, the adhesive in slurry is logicalCross after oven dry, form gluing film, described gluing film adheres to described base material, and described in being distributed inIn the surface and the foam hole of described base material of base material, by described gluing film by described porous powderAdhere in described foam hole, can prevent that described porous powder from leaking out in described foam holeCome, thereby can ensure the use permanence of described sound-absorbing material. When use, only need be by sound absorberMaterial is cut apart by shape and size, is filled in sound chamber, easy to use.
Brief description of the drawings
Fig. 1 is the structural representation of sound-absorbing material of the present invention.
Fig. 2 is the frequency-impedance plot of the sound-absorbing material for preparing of the embodiment of the present invention one;
Fig. 3 is frequency-sound pressure level curve of the sound-absorbing material for preparing of the embodiment of the present invention oneFigure;
Fig. 4 is the frequency-impedance plot of the sound-absorbing material for preparing of the embodiment of the present invention two;
Fig. 5 is frequency-sound pressure level curve of the sound-absorbing material for preparing of the embodiment of the present invention twoFigure;
Fig. 6 is the frequency-impedance plot of the sound-absorbing material for preparing of inventive embodiments three;
Fig. 7 is frequency-sound pressure level curve of the sound-absorbing material for preparing of the embodiment of the present invention threeFigure;
Detailed description of the invention
Below in conjunction with drawings and embodiments, the invention will be further described.
Please refer to Fig. 1, is the structural representation of sound-absorbing material of the present invention. Described sound-absorbing material 1Comprise base material 11, porous powder 12 and gluing film 13.
Described base material 11 is open cell type expanded material, and described open cell type expanded material comprises someIndividual foam hole 111, described foam hole 111 is interconnected. The aperture of described foam hole 111 is200-1000 μ m, is preferably 300-500 μ m.
Described porous powder 12 is filled described base material 11, and is uniformly distributed in described foam hole 111In, because described porous powder 12 has intercommunicating pore, thereby described porous powder 12 is filledDescribed base material 11 ducts are even, and duct is all communicated with, and improved the profit of described porous powder 12By rate, significantly improve the sound-absorbing effect of described sound-absorbing material 1. Be filled in described foam holeDescribed porous powder 12 in 111 is assembled the even particle size forming, the described suction obtainingSound material 1 product percent of pass is high, and production cost is low.
Described gluing film 13 adheres to described base material 11, and is distributed in the table of described base material 11In the foam hole 111 of face and described base material 11 (be distributed in described foam hole 111 described inGluing film 13 is not shown), by described gluing film 13, described porous powder 12 is adhered toIn described foam hole 111, described gluing film 13 can prevent that described porous powder 12 is by describedAbscess 111 spills, thereby can ensure the use permanence of described sound-absorbing material 1.
Described gluing film 13 by adhesive dry form, described adhesive be polystyrene emulsion,Polystyrene-acrylate emulsion, polyacrylate dispersion, polyvinyl acetate-acrylateEmulsion, Polybutadiene-styrene emulsion, EVA emulsion, polyvinyl alcohol waterSolution, PVP aqueous solvent, the polyacrylic acid aqueous solution, polyacrylamide are water-solubleIn liquid, protein aqueous solution, the modified cellulose aqueous solution or soluble starch solution any oneKind. In like manner, adhesive can be also the adhesive of other type, can realize described periporateThe adhesive that material adheres to described base material all belongs to protection scope of the present invention.
When use, described sound-absorbing material 1 is pressed to shape size cutting, and put into sound chamber,Can reach good sound-absorbing effect.
It is base material that described sound-absorbing material 1 adopts open cell type expanded material, and it has the spy of contractionProperty, thereby the packing density of adjustable sound-absorbing material 1 is further adjusted sound-absorbing effect.
The present invention also provides a kind of preparation method of sound-absorbing material. Below pass through specific embodimentPreparation method to described sound-absorbing material is further described.
Embodiment mono-
Step S1: provide porous powder, adhesive and water, by described porous powder, gluingAgent and water are made mixed slurry;
Wherein, the proportioning of described porous powder, described adhesive and water counts 100 by weight:8:500; Described porous powder is Bio-sil material; Described adhesive is polyacrylate breastLiquid;
Described porous powder, adhesive and water are uniformly mixed according to the above ratio, are mixedClose slurry.
Step S2: base material 11 is provided, and described base material 11 is to have several foam holes 111Open cell type expanded material impregnated in described mixed slurry by described base material 11 under vacuum conditionIn;
Described base material 11 is open cell type polystyrol foam material, the foam hole of described base material 11111 average pore size is 550 μ m; By impregnation technology, described porous powder is filled inIn the foam hole 111 of described open cell type expanded material;
Described base material 11 impregnated in the process of described mixed slurry, and working environment is vacuum ringBorder, its vacuum is 0.3 standard atmospheric pressure. Vacuum environment is used for getting rid of described foam hole 111In air, eliminate described base material 11 surface and the interior bubble of described foam hole 111, instituteThe filling effect of stating porous powder is better.
Described base material 11 impregnated in the technique of described mixed slurry, can be by increasing ultrasonic dressPut the technique of vibration, make described porous powder be uniformly distributed with described foam hole in, can be furtherImprove the sound-absorbing effect of described sound-absorbing material 1.
Step S3: take out base material 11 and dry, preparing sound-absorbing material.
The stoving process of described base material 11, adopts the air dry oven of 80 DEG C to be dried 24 hours,By stoving process, the moisture evaporation in mixed slurry, makes described adhesive form gluing film13. Described gluing film 13 adheres to described base material 11, described in described porous powder is adhered toIn foam hole 11; Described gluing film 13 is distributed in surface and the described base material of described base material 11In 11 foam hole 111.
The sound-absorbing material that embodiment mono-is prepared is filled in the sound chamber of acoustical generator, and carries outContrast test experiment. Test result is with reference to Fig. 2, Fig. 3, and wherein Fig. 2 is the embodiment of the present inventionFrequency-the impedance plot of one sound-absorbing material preparing; Fig. 3 is the embodiment of the present invention oneFrequency-sound pressure level curve map of the sound-absorbing material preparing.
Curve a1 in Fig. 2 represents frequency-impedance curve that the sound chamber of acoustical generator is cavity; B1In the sound chamber of expression acoustical generator, fill the frequency-impedance curve of common foam; C1 represents acoustical generatorSound chamber in fill the frequency-impedance curve of the sound-absorbing material for preparing of embodiment mono-.
In Fig. 3, curve a1 represents frequency-sound pressure level curve that the sound chamber of acoustical generator is cavity; B1In the sound chamber of expression acoustical generator, fill frequency-sound pressure level curve of common foam; C1 represents soundingFrequency-sound pressure level curve of the sound-absorbing material that in the sound chamber of device, filling embodiment mono-prepares.
Can analyze and draw by above-mentioned test experiments, in the sound chamber of acoustical generator, fill common foamSound-absorbing effect similar to the sound-absorbing effect of cavity; Fill sound-absorbing material provided by the invention, frequentlyRate is during lower than 600Hz, and acoustical generator resistance value is cavity higher than sound chamber or fills common foamResistance value, and sound pressure level is high, illustrates and uses sound-absorbing material of the present invention, the low frequency of acoustical generatorCan be excellent, the bass effect of acoustical generator is good.
Embodiment bis-
Step S1: provide porous powder, adhesive and water, by described porous powder, gluingAgent and water are made mixed slurry;
Wherein, the proportioning of described porous powder, described adhesive and water counts 100 by weight:10:500; Described porous powder is molecular screen material; Described adhesive is polyacrylate breastLiquid;
Described porous powder, adhesive and water are uniformly mixed according to the above ratio, are mixedClose slurry.
Step S2: base material 11 is provided, and described base material 11 is to have several foam holes 111Open cell type expanded material impregnated in described mixed slurry by described base material 11 under vacuum conditionIn;
Described base material 11 is open cell type polystyrol foam material, the foam hole of described base material 11111 average pore size is 400 μ m; By impregnation technology, described porous powder is filled inIn the foam hole 111 of described open cell type expanded material;
Described base material 11 impregnated in the process of described mixed slurry, and working environment is vacuum ringBorder, its vacuum is 0.5 standard atmospheric pressure. Vacuum environment is used for getting rid of described foam hole 111In air, eliminate described base material 11 surface and the interior bubble of described foam hole 111, instituteThe filling effect of stating porous powder is better.
Described base material 11 impregnated in the technique of described mixed slurry, can be by increasing ultrasonic dressPut the technique of vibration, make described porous powder be uniformly distributed with described foam hole in, can be furtherImprove the sound-absorbing effect of described sound-absorbing material 1.
Step S3: take out base material 11 and dry, preparing sound-absorbing material.
The stoving process of described base material 11, adopts the air dry oven of 100 DEG C to be dried 24 hours,By stoving process, the moisture evaporation in mixed slurry, makes described adhesive form gluing film13. Described gluing film 13 adheres to described base material 11, described in described porous powder is adhered toIn foam hole 11; Described gluing film 13 is distributed in surface and the described base material of described base material 11In 11 foam hole 111.
The sound-absorbing material that embodiment bis-is prepared is filled in the sound chamber of acoustical generator, and carries outContrast test experiment. Test result is with reference to Fig. 4, Fig. 5, and wherein Fig. 4 is the embodiment of the present inventionFrequency-the impedance plot of two sound-absorbing materials that prepare; Fig. 5 is the embodiment of the present invention twoFrequency-sound pressure level curve map of the sound-absorbing material preparing.
Curve a2 in Fig. 4 represents frequency-impedance curve that the sound chamber of acoustical generator is cavity; B2In the sound chamber of expression acoustical generator, fill the frequency-impedance curve of common foam; C2 represents acoustical generatorSound chamber in fill the frequency-impedance curve of the sound-absorbing material for preparing of embodiment bis-.
In Fig. 5, curve a2 represents frequency-sound pressure level curve that the sound chamber of acoustical generator is cavity; B2In the sound chamber of expression acoustical generator, fill frequency-sound pressure level curve of common foam; C2 represents soundingFrequency-sound pressure level curve of the sound-absorbing material that in the sound chamber of device, filling embodiment bis-prepares.
Can analyze and draw by above-mentioned test experiments, fill sound-absorbing material of the present invention, frequencyDuring lower than 600Hz, the low frequency performance of acoustical generator is excellent, and the bass effect of acoustical generator is good.
Embodiment tri-
Step S1: provide porous powder, adhesive and water, by described porous powder, gluingAgent and water are made mixed slurry;
Wherein, the proportioning of described porous powder, described adhesive and water counts 100 by weight:12:500; Described porous powder is porous graphite material; Described adhesive be polybutadiene-Styrene emulsion;
Described porous powder, adhesive and water are uniformly mixed according to the above ratio, are mixedClose slurry.
Step S2: base material 11 is provided, and described base material 11 is to have several foam holes 111Open cell type expanded material impregnated in described mixed slurry by described base material 11 under vacuum conditionIn;
Described base material 11 is open cell type polystyrol foam material, the foam hole of described base material 11111 average pore size is 300 μ m; By impregnation technology, described porous powder is filled inIn the foam hole 111 of described open cell type expanded material;
Described base material 11 impregnated in the process of described mixed slurry, and working environment is vacuum ringBorder, its vacuum is 0.8 standard atmospheric pressure. Vacuum environment is used for getting rid of described foam hole 111In air, eliminate described base material 11 surface and the interior bubble of described foam hole 111, instituteThe filling effect of stating porous powder is better.
Described base material 11 impregnated in the technique of described mixed slurry, can be by increasing ultrasonic dressPut the technique of vibration, make described porous powder be uniformly distributed with described foam hole in, can be furtherImprove the sound-absorbing effect of described sound-absorbing material 1.
Step S3: take out base material 11 and dry, preparing sound-absorbing material.
The stoving process of described base material 11, adopts the air dry oven of 120 DEG C to be dried 24 hours,By stoving process, the moisture evaporation in mixed slurry, makes described adhesive form gluing film13. Described gluing film 13 adheres to described base material 11, described in described porous powder is adhered toIn foam hole 11; Described gluing film 13 is distributed in surface and the described base material of described base material 11In 11 foam hole 111.
The sound-absorbing material that embodiment tri-is prepared is filled in the sound chamber of acoustical generator, and carries outContrast test experiment. Test result is with reference to Fig. 6, Fig. 7, and wherein Fig. 6 is the embodiment of the present inventionFrequency-the impedance plot of three sound-absorbing materials that prepare; Fig. 7 is the embodiment of the present invention threeFrequency-sound pressure level curve map of the sound-absorbing material preparing.
Curve a3 in Fig. 6 represents frequency-impedance curve that the sound chamber of acoustical generator is cavity; B3In the sound chamber of expression acoustical generator, fill the frequency-impedance curve of common foam; C3 represents acoustical generatorSound chamber in fill the frequency-impedance curve of the sound-absorbing material for preparing of embodiment tri-.
In Fig. 7, curve a3 represents frequency-sound pressure level curve that the sound chamber of acoustical generator is cavity; B3In the sound chamber of expression acoustical generator, fill frequency-sound pressure level curve of common foam; C3 represents soundingFrequency-sound pressure level curve of the sound-absorbing material that in the sound chamber of device, filling embodiment tri-prepares.
Can analyze and draw by above-mentioned test experiments, fill sound-absorbing material of the present invention, frequencyDuring lower than 500Hz, the low frequency performance of acoustical generator is excellent, and the bass effect of acoustical generator is good.
It should be noted that the preparation method of sound-absorbing material of the present invention is only listed as in embodimentThree preferred embodiments are gone out. And in concrete preparation method, each technological parameter is not limited to realityExecute the parameter of listing in example one, embodiment bis-, embodiment tri-. Be described as follows:
Described porous powder is except Bio-sil material, the molecular sieve material listed in above-mentioned embodimentOutside material, porous graphite material, can also be porous charcoal black-materials. In addition, described porousPowder can also be Bio-sil material, molecular screen material, porous graphite material or porous carbon blackIn two or more mixture.
Described adhesive is except polyacrylate dispersion, the polybutadiene listed in above-mentioned embodimentOutside-styrene emulsion, can also be polystyrene emulsion, Polystyrene-acrylate emulsion,Polyvinyl acetate-acrylic acid ester emulsion, EVA emulsion, polyvinyl alcohol waterSolution, PVP aqueous solvent, the polyacrylic acid aqueous solution, polyacrylamide are water-solubleIn liquid, protein aqueous solution, the modified cellulose aqueous solution or soluble starch solution any onePlant or multiple combination arbitrarily.
The proportioning of described porous powder, described adhesive and water counts 100 by weight:(6-16): (200-1000), the proportioning of listing in above-mentioned embodiment, in this scopeOther interior proportionings can realize sound-absorbing material of the present invention equally. As described in porous powder,The proportioning of described adhesive and water is counted 100:6:200 by weight, or 100:16:1000,Or 100:15:800 equal proportion.
The aperture of the foam hole 111 of described base material 11 be within the scope of 200-2000 μ m arbitrarilyValue all can realize sound-absorbing material of the present invention, is preferably 300-550 μ m.
The vacuum that described base material 11 impregnated in described mixed slurry technique is 0.1-0.99 standardAtmospheric pressure, the vacuum of listing in above-mentioned embodiment, other vacuum within the scope of thisDegree value can realize sound-absorbing material of the present invention equally.
In the stoving process of described base material 11, bake out temperature is not limited to be listed as in above-mentioned embodimentGo out 80 DEG C, 100 DEG C, 120 DEG C, any temperature of bake out temperature in the scope of 50-150 DEG CDegree value all can realize sound-absorbing material of the present invention, as 50 DEG C, 60 DEG C, 110 DEG C, 140 DEG C,150 DEG C etc.
Compared with correlation technique, the preparation side of sound-absorbing material provided by the invention and sound-absorbing materialMethod, beneficial effect is as follows:
One, sound-absorbing material provided by the invention, using open cell type expanded material as base material, porousPowder packed several foam holes in described open cell type expanded material, and by the glue formingDescribed porous powder is adhered to described base material by mucous membrane. Foaming in described open cell type expanded materialHole is interconnected, and therefore, the duct forming in sound-absorbing material is even, and is perforate, therebySignificantly improve the sound-absorbing effect of sound-absorbing material, and improved the utilization rate of described porous powder.Sound-absorbing material of the present invention is filled in the sound chamber of acoustical generator, can effectively improves the low of acoustical generatorFrequently performance.
Two, sound-absorbing material provided by the invention, by base material be impregnated in described porous powder withIn the slurry that described adhesive is made, make described porous powder uniform filling sending out in described base materialIn abscess, and the voluminous powder even particle size forming, described porous powder utilization rate is high,The sound-absorbing material product percent of pass obtaining is high, and production cost is low.
Three, sound-absorbing material provided by the invention, in preparation technology, the adhesive in slurry is logicalCross after oven dry, form gluing film, described gluing film adheres to described base material, and described in being distributed inIn the surface and the foam hole of described base material of base material, by described gluing film by described porous powderAdhere in described foam hole, can prevent that described porous powder from being leaked out by described foam hole,Thereby can ensure the use permanence of described sound-absorbing material. When use, only sound-absorbing material need be pressedShape and size are cut apart, and are filled in sound chamber, easy to use.
The foregoing is only embodiments of the invention, not thereby limit patent model of the present inventionEnclose every equivalent structure or change of equivalent flow process that utilizes description of the present invention and accompanying drawing content to doChange, or be directly or indirectly used in other relevant technical field, be all in like manner included in the present inventionScope of patent protection in.
Claims (10)
1. a sound-absorbing material, is characterized in that, comprises base material, porous powder and gluing film,Described base material is the open cell type expanded material with several foam holes, and described porous powder is filled inIn described foam hole, described gluing film adheres to described base material, and described porous powder is adhered to instituteState in foam hole.
2. sound-absorbing material according to claim 1, is characterized in that, described foam holeAperture is 200-1000 μ m.
3. sound-absorbing material according to claim 1, is characterized in that, described porous powderFor in Bio-sil material, molecular screen material, porous graphite material and porous charcoal black-materials arbitrarilyOne or more combination.
4. a preparation method for sound-absorbing material, is characterized in that, comprises the steps:
Porous powder, adhesive and water are provided, described porous powder, adhesive and water are made mixedClose slurry;
Base material is provided, and described base material is the open cell type expanded material with several foam holes, veryUnder empty condition, described base material be impregnated in described mixed slurry;
Take out base material and dry, obtaining described sound-absorbing material.
5. the preparation method of sound-absorbing material according to claim 4, is characterized in that, instituteState the proportioning of porous powder, adhesive and water and count by weight 100:(6-16): (200-1000).
6. the preparation method of sound-absorbing material according to claim 4, is characterized in that, instituteStating porous powder is Bio-sil material, molecular screen material, porous graphite material and porous carbon black materialAny one in material or multiple combination.
7. the preparation method of sound-absorbing material according to claim 4, is characterized in that, instituteState adhesive and be polystyrene emulsion, Polystyrene-acrylate emulsion, polyacrylate dispersion,Polyvinyl acetate-acrylic acid ester emulsion, Polybutadiene-styrene emulsion, polyethylene vinyl acetateEster emulsion, polyvinyl alcohol water solution, PVP aqueous solvent, the polyacrylic acid aqueous solution,Polyacrylamide solution, protein aqueous solution, the modified cellulose aqueous solution or soluble starch are moltenAny one in liquid.
8. the preparation method of sound-absorbing material according to claim 4, is characterized in that, instituteThe aperture of stating foam hole is 200-1000 μ m.
9. the preparation method of sound-absorbing material according to claim 8, is characterized in that, instituteStating base material is polyethylene, polypropylene, polystyrene, EVA, polyurethane, poly-Any one in BS or polyvinyl chloride.
10. the preparation method of sound-absorbing material according to claim 4, is characterized in that, instituteThe bake out temperature of stating base material is 50-150 DEG C.
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| CN201610053519.5A CN105601984B (en) | 2016-01-26 | 2016-01-26 | Sound absorbing material and preparation method thereof |
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| CN106875934A (en) * | 2017-03-30 | 2017-06-20 | 歌尔股份有限公司 | Metal organic frame sound-absorbing part and sound-producing device module |
| CN107022107A (en) * | 2017-04-18 | 2017-08-08 | 尹东海 | A kind of solid-state tuning body and its manufacture craft |
| CN108059388A (en) * | 2017-11-29 | 2018-05-22 | 瑞声科技(新加坡)有限公司 | Sound-absorbing particle and preparation method thereof, loudspeaker enclosure |
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