US20080164093A1 - Sound Absorbing Material and Structure Using the Same - Google Patents

Sound Absorbing Material and Structure Using the Same Download PDF

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Publication number
US20080164093A1
US20080164093A1 US11/885,162 US88516205A US2008164093A1 US 20080164093 A1 US20080164093 A1 US 20080164093A1 US 88516205 A US88516205 A US 88516205A US 2008164093 A1 US2008164093 A1 US 2008164093A1
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Prior art keywords
absorbing material
sound absorbing
porous layer
film
material according
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Abandoned
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US11/885,162
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English (en)
Inventor
Susumu Hirai
Minoru Okashita
Hiroki Kobayashi
Tasuku Kitamura
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SWCC Showa Device Technology Co Ltd
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SWCC Showa Device Technology Co Ltd
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Assigned to SWCC SHOWA DEVICE TECHNOLOGY CO., LTD. reassignment SWCC SHOWA DEVICE TECHNOLOGY CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HIRAI, SUSUMU, KITAMURA, TASUKU, KOBAYASHI, HIROKI, OKASHITA, MINORU
Publication of US20080164093A1 publication Critical patent/US20080164093A1/en
Abandoned legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/20—Layered products comprising a layer of natural or synthetic rubber comprising silicone rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
    • E01F8/0029—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with porous surfaces, e.g. concrete with porous fillers
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B1/86—Sound-absorbing elements slab-shaped
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/162—Selection of materials
    • G10K11/168—Plural layers of different materials, e.g. sandwiches
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8461—Solid slabs or blocks layered

Definitions

  • This invention relates to a sound absorbing material and a structure using the same.
  • this invention relates to the sound absorbing material and the structure using the same which absorbs noise of high-frequency band beyond 200 Hz as well as low-frequency band of 200 Hz or less effectively and can improve the degree of freedom of the product form.
  • the sound absorbing material of this kind (a) the thing which uses a porous layer comprising a glass wool or a rock wool, and so on; (b) the thing which has an air layer in the sound source side; (c) the thing which has an air layer in the sound source side of the sound absorbing material; (d) the thing which laminates the aggregates of the high density and low density fibers more than at least two layers that the air permeability are different approximately 5-100 times; are known (for example, refer to patent document No. 1).
  • the high density part plays the role of the mass and the low density part plays the role of the spring. That is, so-called dynamic vibration absorber is composed and the sound absorption coefficient is improved in low-frequency band especially.
  • the sound absorbing material of this kind of structure there was a difficult point that the sufficient sound absorbing effect is not obtained in so-called low-frequency band of 100 Hz or less especially.
  • the applicant of this invention developed the sound absorbing material which laminated the aggregate of fibers having different density additionally to the porous sound absorbing structure which absorbed sound by using the viscous resistance of the air and by converting the energy of the sound wave to the thermal energy. And the applicant of this invention filed the invention as a patent (Japanese Patent Publication No. 2003-316364).
  • This sound absorbing material has the foam layer placed in the sound source side and has the porous layer laminated on the rigid wall side of this foam layer.
  • the foam layer is formed by foam including each ingredients, that is, first diol of molecular weight 500-5000, second diol of molecular weight 500 or less, inorganic filler, water as the blowing agent and isocyanate.
  • the porous layer is formed by general-purpose glass wool.
  • the high density part plays the role of the mass and the low density part plays the role of the spring. Therefore, so-called dynamic vibration absorb is composed, and the sound absorption coefficient can be improved in low-frequency band especially.
  • the sound absorbing effect becomes weak in the high-frequency band beyond 200 Hz or in the low-frequency band of 200 Hz or less.
  • Patent document No. 1 Japanese Patent Publication No. Hei08-152890
  • Patent document No. 2 Japanese Patent Publication No. 2003-316364
  • This invention aims to provide the sound absorbing material and the structure using the same which can absorb the noise of high-frequency band beyond 200 Hz as well as low-frequency band of 200 Hz or less effectively and can improve the degree of freedom of the product form.
  • a sound absorbing material as the first feature of this invention comprises a film which is composed of a rubber, and a porous layer which is laminated on a back surface of the film.
  • the sound absorbing material as the second feature of this invention comprises the film which is composed of the rubber, and the porous layer which is laminated on the back surface of the film, and an another porous layer which is laminated on a front surface of the film.
  • the rubber is composed of a silicone rubber.
  • a heat release value of combustion of the film is 8 MJ/m 2 or less.
  • a heat release rate of combustion of the film is [200 kW/m 2 ] ⁇ 10 sec or less.
  • the rubber is composed of any one of the rubber selected from natural r isoprene rubber, styrene-butadiene rubber, butadiene rubber, nitrile-butadiene rubber, butyl rubber, ethylene-proplene rubber, fluoro-rubber, chlorosulfonated polyethylene rubber, chlorinated polyethylene rubber, epichlorohydrin r polysulfide r and polyolefin.
  • the film in the sound absorbing material of any one of the features from the first to the sixth, includes an inorganic compound.
  • the inorganic compound comprises the c including any one of Si, Ca, Sr, Ba, or comprises a blended material of the compound including any one of Si, Ca, Sr, Ba.
  • the porous layer is formed from the material having flame retardancy.
  • the porous layer is formed from any one of glass wool or rock wool, or from a mixture thereof.
  • the film in the sound absorbing material of any one of the features from the first to the tenth, is integrated with the porous layer.
  • the film is integrated with either the porous layer or the another porous layer.
  • the film in the sound absorbing material of the eleventh feature or the twelfth feature, is integrated with the porous layer and/or the another porous layer by adhesion.
  • the film in the sound absorbing material of the eleventh feature or the twelfth feature, is integrated with the porous layer and/or the another porous layer by thermal adhesion.
  • the film in the sound absorbing material of the eleventh feature or the twelfth feature, is integrated with the porous layer and/or the another porous layer by silicone graft reaction.
  • the film in the sound absorbing material of the eleventh feature or the twelfth feature, is integrated with the porous layer and/or the another porous layer when a part of the film enters into empty spaces of the porous layer and/or the another porous layer.
  • a structure as the seventeenth feature of this invention comprises a sound absorbing material of any one of the features from the first to the sixteenth, and a rigid wall, wherein a porous layer which constitutes the sound absorbing material faces the rigid wall, and the sound absorbing material is arranged in parallel with the rigid wall.
  • the structure as the eighteenth feature of this invention comprises a sound absorbing material of any one of the features from the first to the sixteenth, and a sound insulation board, wherein an another porous layer which constitutes the sound absorbing, material faces the sound insulation board, and the sound absorbing material is arranged in parallel with the sound insulation board.
  • the structure as the nineteenth feature of this invention comprises a sound absorbing material of any one of the features from the first to the sixteenth, and a rigid wall, wherein a porous layer which constitutes the sound absorbing material faces the rigid wall through an air layer, and the sound absorbing material is arranged in parallel with the rigid wall.
  • the structure as the twentieth feature of this invention comprises a sound absorbing material of any one of the features from the first to the sixteenth, and a sound insulation board, wherein an another porous layer which constitutes the sound absorbing material faces the sound insulation board through an air layer, and the sound absorbing material is arranged in parallel with the sound insulation board.
  • the structure as the twenty-first feature of this invention comprises a sound absorbing material of any one of the features from the first to the sixteenth, and a rigid wall, wherein a heat release value of combustion of the sound absorbing material is 8 MJ/m 2 or less, and a heat release rate of combustion of the sound absorbing material is [200 kW/m 2 ] ⁇ 10 sec or less.
  • this sound absorbing material can be arranged in the place where the flame retardancy is needed.
  • the noise of high-frequency band beyond 200 Hz as well as low-frequency band of 200 Hz or less can be absorbed effectively.
  • FIG. 1 The sectional view of the sound absorbing material and the structure using the same in the first embodiment of this invention.
  • FIG. 2 The illustration which shows another embodiment of the film in the first embodiment of this invention.
  • FIG. 3 The illustration which shows the sound absorption characteristics of the sound absorbing material in the first embodiment of this invention.
  • FIG. 4 The sectional view of the structure of the filmy sound absorbing structure which used the sound absorbing material in the first embodiment of this invention.
  • FIG. 5 The sectional view of the structure that the sound absorbing material is applied to the sound insulation wall in the first embodiment of this invention.
  • FIG. 6 The sectional view of the sound absorbing material and the structure using the same in the fourth embodiment of this invention.
  • FIG. 7 The illustration which shows the sound absorption characteristics of the sound absorbing material in the fourth embodiment of this invention.
  • FIG. 8 The sectional view of the structure of the filmy sound absorbing structure which used the sound absorbing material in the fourth embodiment of this invention.
  • FIG. 9 The sectional view of the structure that the sound absorbing material is applied to the sound insulation wall in the fourth embodiment of this invention.
  • FIG. 1 is the sectional view which shows the first embodiment of this invention using the sound absorbing material and the structure using the same.
  • the sound absorbing material 1 a of this invention comprises the film 11 composed of the silicone rubber and the porous layer 12 (hereinafter called, “first porous layer”) which is laminated on the back surface of the film 11 .
  • first porous layer the porous layer 12 which is laminated on the back surface of the film 11 .
  • the reason to laminate the first porous layer 12 on the back surface of the film 11 composed of the silicone rubber is that the film 11 acts as the mass, that is, the role of the weight, and the first porous layer 12 acts as spring, that is, the role of the air spring, and the sound absorption is performed by membrane vibration.
  • the film 11 is composed of the material which has flame retardancy and generates no noxious fume during combustion.
  • the film 11 is composed of the silicone rubber in which barium sulfate was mixed.
  • the heat release value of combustion per unit volume is 8 MJ/m 2 or less. If the heat release value of combustion per unit volume of the film 11 exceeds 8 MJ/m 2 , the sound absorbing material cannot fit the flame retardancy grade prescribed in No. 9 of Article 2 of the Building Standard Law which is the applicable law to the product of this embodiment. Meanwhile, the heat release value of combustion of the film 11 can be adjusted by the kind or the blending quantity of the inorganic filler which is blended in the raw material resin of the film 11 .
  • the heat release value of combustion per unit volume can be adjusted to 8 MJ/m 2 or less.
  • the heat release rate of combustion is [200 kW/m2] ⁇ 10 sec or less. If the heat release rate of combustion of the film 11 exceeds [200 kW/m 2 ] ⁇ 10 sec, the sound absorbing material cannot fit the flame retardancy grade prescribed in No. 9 of Article 2 of the Building Standard Law.
  • the heat release rate of combustion can be adjusted to [200 kW/m 2 ] ⁇ 10 sec or less.
  • the first porous layer 12 is formed from the material having flame retardancy.
  • the first porous layer 12 is formed from any one of glass wool or rock wool, or from a mixture thereof.
  • the film 11 of such composition with the first porous layer 12 by adhesion or silicone graft reaction for improving the degree of freedom of the product form and for making the construction easy on the site.
  • the structure 3 a using the sound absorbing material 1 a of this kind of composition because the flame retardancy which fits the standard of the flame retardancy of the Building Standard Law is given to the sound absorbing material itself, this sound absorbing material can be arranged in the place where the flame retardancy is needed. And, because neither the halogen system flame retardant nor the lead compound is used as the flame retardant, even if the sound absorbing material combusts, there is no fear that the noxious fume is generated during combustion. Further, because the film 11 is integrated with the first porous layer 12 , the construction on the site can be performed easily.
  • the film 11 is formed only with silicone rubber
  • the compound including any one of Si, Ca, Sr and Ba as the ratio of 2:1-1:1 into silicone rubber was mixed.
  • the film 11 of this kind of structure by mixing the barium sulfate of the high-bulk density and the small grain size into the porous part of the silicone rubber of the network structure, the film having the flame retardancy, flexibility and predefined area density can be formed.
  • FIG. 2 is the illustration which shows the sound absorption coefficient, the area density, the film thickness, the heat release value and the heat release rate of the film in the embodiment of this invention together with the comparative example.
  • the film in this embodiment is formed by mixing silica, calcium carbonate, strontium carbonate and barium sulfate into the silicone rubber as the ratio of 2:1. And the film opposed of urethane as the comparative example is used.
  • the heat release value was measured by the means prescribed in No. 9 of Article 2 of the Building Standard Law, and the heat release rate was measured by the means prescribed in ISO5660.
  • the film of this embodiment even if the film thickness is thinned than the film thickness of the comparison example as for only about 1 ⁇ 3, the sound absorption coefficient and the area density which are equal to the comparative example can be obtained. And, the film in this embodiment can be fitted to the flame retardancy grade prescribed in No. 9 of Article 2 of the Building Standard Law. Further, it is possible to make the heat release rate of combustion into less than [200 kW/m 2 ] ⁇ 10 sec.
  • FIG. 3 shows the sound absorption characteristics of the sound absorbing material 1 a of the first embodiment.
  • the dotted line L 1 shows the sound absorption characteristics of the sound absorbing material of the conventional technology when the thickness of the porous layer (glass wool) is 100 mm.
  • the solid line L 2 shows the sound absorption characteristics of the flame retardant sound absorbing material of the first embodiment when the thickness of the film (silicone rubber film) 11 is 0.5 mm and the thickness of the first porous layer (glass wool) 12 is 75 mm.
  • the sound absorbing material (L 1 ) of the conventional technology it is clear that although the sound absorption coefficient in the high-frequency band beyond about 200 Hz is high, the sound absorption coefficient in the low-frequency band about 200 Hz or less is low.
  • the sound absorbing material (L 2 ) of the first embodiment it is clear that although the sound absorption coefficient in the high-frequency band beyond about 200 Hz is low, the sound absorption coefficient in the low-frequency band about 200 Hz or less is high. Therefore, if the sound absorbing material of the first embodiment is used, the sound absorbing material which is able to apply to the low-frequency band can be provided.
  • FIG. 4 shows the sectional view of the structure of the filmy sound absorbing structure which used the sound absorbing material 1 a of the first embodiment. Meanwhile, in this figure, the same reference numbers are given to the portions which are common to FIG. 1 , and detailed explanation is omitted.
  • the structure 3 b of this invention comprises the rigid wall 2 , and the filmy (thickness: about 0.5 mm) sound absorbing material 1 a that the first porous layer 12 faces the rigid wall 2 and which is arranged on the sound source side of the rigid wall 2 in parallel with the rigid wall 2 through a pair of supporting members 4 a , 4 b , and the back air layer 5 which is sectioned between the sound absorbing material 1 a and the rigid wall 2 .
  • the structure 3 b of the filmy sound absorbing structure of such composition because the back air layer 5 acts as the spring to the mass of the filmy sound absorbing material 1 a , the single resonance system is formed. And, when the frequency of the sound wave accorded with the resonance frequency of this single resonance system, the filmy sound absorbing material 1 a vibrates, and sound absorption is performed by the internal friction. Therefore, according to the structure 3 b of the second embodiment, as before, the structure 3 b can be arranged in the place where the flame retardancy is needed. And, because neither the halogen system flame retardant nor the lead compound is used as the flame retardant, even if the sound absorbing material combusts, there is no fear that the noxious fume is generated during combustion. Further, because the film 11 is integrated with the first porous layer 12 , the construction on the site can be performed easily. In addition, the sound absorption coefficient can be improved more than the structure 3 a of the first embodiment.
  • FIG. 5 shows the sectional view of the structure which applied the sound absorbing material 1 a to the sound insulation wall of the first embodiment. Meanwhile, in this figure, the same reference numbers are given to the portions which are common to FIG. 1 , and detailed explanation is omitted.
  • the structure 3 c of this invention has the hollow double wall 6 which is placed as the simplified partition, for example on the floor inside the building.
  • the hollow double wall 6 comprises the first wall member 6 a which is arranged in the sound source side, and the second wall member 6 b which is arranged in parallel with the first wall member 6 a at the position where predefined length was estranged from the first wall member 6 a in the sound receiving side. And, the aforementioned sound absorbing material 1 a is arranged in parallel with the first wall member 6 a (or the second wall member 6 b ) between these first and second wall members 6 a , 6 b.
  • the sound absorbing material 1 a that the flame retardancy which fits the standard of the flame retardancy of the Building Standard Law is given to the sound absorbing material itself is arranged between the first and second wall members 6 a , 6 b , as before, the sound absorbing material can be arranged in the place where the flame retardancy is needed. And, because neither the halogen system flame retardant nor the lead compound is used as the flame retardant, even if the sound absorbing material combusts, there is no fear that the noxious fume is generated during combustion. Further, because the film 11 is integrated with the first porous layer 12 , the construction on the site can be performed easily.
  • FIG. 6 shows the sectional view of another sound absorbing material and the structure using the same of the fourth embodiment in this invention. Meanwhile, in this figure, the same reference numbers are given to the portions which are common to FIG. 1 , and detailed explanation is omitted.
  • the another sound absorbing material 1 b of this invention comprises the film 11 composed of the silicone rubber, and the first porous layer 12 which is laminated on the back surface of the film 11 , and the porous layer 13 (hereinafter called, “second porous layer”) which is laminated on the front surface of the film 11 .
  • the reason to laminate the first and second porous layer 12 , 13 on the both surfaces of the film 11 is that the film 11 acts as the mass, that is, the role of the weight, and the first and second porous layer 12 , 13 act as spring, that is, the role of the air spring, and the sound absorption is performed by membrane vibration.
  • the second porous layer 13 is formed by the same material as the aforementioned first porous layer 12 . And, it is preferable to integrate the film 11 at least with any one of the first and second porous layer 12 , 13 by the aforementioned similar means.
  • the structure 3 d of this invention is formed.
  • FIG. 7 shows the sound absorption characteristics of the sound absorbing material of the fourth embodiment.
  • the dotted line L 1 shows the sound absorption characteristics of the sound absorbing material of the conventional technology when the thickness of the porous layer (glass wool) is 100 mm.
  • the solid line L 3 shows the sound absorption characteristics of the sound absorbing material of the fourth embodiment when the thickness of the film (silicone rubber film) 11 is 0.5 mm and the thicknesses of the first and second porous layer (glass wool) 12 , 13 are 75 mm.
  • the sound absorbing material (L 1 ) of the conventional technology as before, it is clear that although the sound absorption coefficient in the high-frequency band beyond about 200 Hz is high, the sound absorption coefficient in the low-frequency band about 200 Hz or less is low.
  • the sound absorbing material (L 3 ) of the fourth embodiment it is clear that the superior sound absorption characteristic is shown not only in the low-frequency band about 200 Hz or less but also in the high-frequency band beyond about 200 Hz. Therefore, if the sound absorbing material of the fourth embodiment is used, the sound absorbing material which is applicable to the wide frequency band can be provided.
  • FIG. 8 shows the sectional view of the structure of the filmy sound absorbing structure which used the sound absorbing material 1 b of the fourth embodiment. Meanwhile, in this figure, the same reference numbers are given to the portions which are common to FIG. 1 , FIG. 4 and FIG. 6 , and detailed explanation is omitted.
  • the structure 3 e of this invention comprises the rigid wall 2 , and the filmy (thickness: about 0.5 mm) sound absorbing material 1 b that the first porous layer 12 faces the rigid wall 2 and which is arranged on the sound source side of the rigid wall 2 in parallel with the rigid wall 2 through a pair of supporting members 4 a , 4 b , and the back air layer 5 which is sectioned between the sound absorbing material 1 b and the rigid wall 2 .
  • the structure 3 e of the filmy sound absorbing structure of such composition because the back air layer 5 acts as the spring to the mass of the filmy sound absorbing material 1 b , the single resonance system is formed. And, when the frequency of the sound wave accorded with the resonance frequency of this single resonance system, the filmy sound absorbing material 1 b vibrates, and sound absorption is performed by the internal friction. Therefore, according to the structure 3 e of the fifth embodiment, as before, the structure 3 e can be arranged in the place were the flame retardancy is needed. And, because neither the halogen system flame retardant nor the lead compound is used as the flame retardant, even if the sound absorbing material combusts, there is no fear that the noxious fume is generated during combustion. Further, because the film 11 is integrated with the first porous layer 12 , the construction on the site can be performed easily. In addition, the sound absorption coefficient can be improved more than the structure 3 b of the fourth embodiment.
  • FIG. 9 shows the sectional view of the structure that the sound absorbing material 1 b of the fourth embodiment is applied to the sound insulation wall. Meanwhile, in this figure, the same reference numbers are given to the portions which are common to FIG. 1 , FIG. 5 and FIG. 6 , and detailed explanation is omitted.
  • the structure 3 f of this invention has the hollow double wall 6 which is placed as the simplified partition on the floor inside the building.
  • the hollow double wall 6 comprises the first wall member 6 a which is arranged in the sound source side, and the second wall member 6 b which is arranged in parallel with the first wall member 6 a at the position where predefined length was estranged form the first wall member 6 a in the sound receiving side.
  • the sound absorbing material 1 b of the fourth embodiment is arranged in parallel with the first wall member 6 a (or the second wall member 6 b ) between these first and second wall members 6 a , 6 b.
  • the sound absorbing material 1 b that the flame retardancy which fits the standard of the flame retardancy of the Building Standard Law is given to the sound absorbing material itself is arranged between the first and second wall members 6 a , 6 b , as before, the sound absorbing material can be arranged in the place where the flame retardancy is needed. And, because neither the halogen system flame retardant nor the lead compound is used as the flame retardant, even if the sound absorbing material combusts, there is no fear that the noxious fume is generated during combustion. Further, because the film 11 is integrated with the first porous layer 12 , the construction on the site can be performed easily.
  • the silicone rubber is used as the film
  • the silicone rubber also it is possible to use any one of the r selected frail natural rubber, isoprene rubber, styrene-butadiene rube, butadiene rubber, nitrile-butadiene r butyl rubber, ethylene-propylene rubber, fluoro-rubber, chlorosulfonated polyethylene rubber, chlorinated polyethylene epichlorohydrin rubber, polysulfide rubber and polyolefin.
  • the film 11 is integrated at least with any one of the first or the second porous layer 12 , 13 by means of adhesion or silicone graft reaction and so on is explained, also it is possible to integrate both by giving some pressure when the film 11 and/or the first or the second porous layer 12 , 13 reached the softening temperature (for example, 80° C.) after heating the film 11 and/or the first or the second porous layer 12 , 13 .
  • the softening temperature for example, 80° C.
  • the heat release value of combustion and the heat release rate of combustion are explained, also it is possible that the heat release value of combustion of the sound absorbing material itself is 8 MJ/m 2 or less, and it is possible that the heat release rate of combustion of the sound absorbing material itself is [200 kW/m 2 ] ⁇ 10 sec or less.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Electromagnetism (AREA)
  • Multimedia (AREA)
  • Building Environments (AREA)
  • Laminated Bodies (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
US11/885,162 2005-03-17 2005-12-09 Sound Absorbing Material and Structure Using the Same Abandoned US20080164093A1 (en)

Applications Claiming Priority (3)

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JP2005077593 2005-03-17
JP2005-077593 2005-03-17
PCT/JP2005/022670 WO2006098064A1 (ja) 2005-03-17 2005-12-09 吸音材およびこれを用いた構造体

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EP (1) EP1859928A1 (ja)
JP (2) JP4891897B2 (ja)
KR (1) KR20070114288A (ja)
TW (1) TW200634726A (ja)
WO (1) WO2006098064A1 (ja)

Cited By (6)

* Cited by examiner, † Cited by third party
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US20090120717A1 (en) * 2007-10-11 2009-05-14 Yamaha Corporation Sound absorbing structure and sound chamber
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JP2010186144A (ja) * 2009-02-13 2010-08-26 Swcc Showa Device Technology Co Ltd 防音装置
JP2010286535A (ja) * 2009-06-09 2010-12-24 Taisei Corp 吸音材およびこれを用いた吸音構造
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US20110100747A1 (en) * 2006-05-24 2011-05-05 Airbus Operations Gmbh Sandwich element for the sound-absorbing inner cladding of means of transport, especially for the sound-absorbing inner cladding of aircraft
US20090120717A1 (en) * 2007-10-11 2009-05-14 Yamaha Corporation Sound absorbing structure and sound chamber
US8360201B2 (en) * 2007-10-11 2013-01-29 Yamaha Corporation Sound absorbing structure and sound chamber
US20110100746A1 (en) * 2007-12-21 2011-05-05 3M Innovative Properties Company Viscoelastic phononic crystal
US9324312B2 (en) * 2007-12-21 2016-04-26 3M Innovative Properties Company Viscoelastic phononic crystal
US20100044148A1 (en) * 2008-08-20 2010-02-25 Rento Tanase Sound absorbing structure using closed-cell porous medium
US20170015081A1 (en) * 2015-07-17 2017-01-19 Mecaer Aviation Group S.P.A. Multilayer panel for soundproofing aircraft interiors
US10011087B2 (en) * 2015-07-17 2018-07-03 Mecaer Aviation Group S.P.A. Multilayer panel for soundproofing aircraft interiors
CN116731609A (zh) * 2023-07-25 2023-09-12 尚德环保科技有限公司 一种硅橡胶吸声涂料及其制备方法

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