JP2012214997A - Laminate for reducing floor impact sound - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminate for reducing floor impact sound which reduces heavy weight floor impact sound of an existing wooden building and easily suppresses the increase of weight.SOLUTION: A laminate 11 for reducing floor impact sound is laid on a floor material 22 on an upstairs floor of a wooden building. The laminate 11 for reducing floor impact sound has a laminated structure of an inorganic fiber layer 12 and a viscoelastic material layer 13. The inorganic fiber layer 12 is positioned between the floor material 22 and the viscoelastic material layer 13. The viscoelastic material layer 13 has a thickness of equal to or less than 4 mm. Preferably the viscoelastic material layer 13 has a thickness of equal to or more than 2 mm.

Description

  The present invention relates to a laminated body for floor impact sound reduction that reduces heavy floor impact sound in a wooden building.

  As a floor structure of a wooden building, for example, a structure in which a floor material is arranged on an upper layer of an ALC panel is known. In such a floor structure, the soundproof performance, fireproof performance, etc. of the ALC panel are exhibited (see Patent Documents 1 and 2).

Japanese Patent Laid-Open No. 08-151770 JP 2000-136593 A

  In the existing wooden building, since the countermeasure against impact sound in which a new member is arranged below the floor material is to peel off the floor material, it takes time for construction. In the laminate for reducing floor impact sound laid on a flooring, the present invention has a configuration capable of reducing heavy floor impact sound using a viscoelastic body and suppressing an increase in weight due to the viscoelastic body. It was made by finding.

  The objective of this invention is providing the laminated body for floor impact sound reduction which can suppress a heavy floor impact sound easily and can suppress an increase in weight in the existing wooden building.

  In order to achieve the above object, a laminate for floor impact sound reduction according to claim 1 of the present invention is a laminate for floor impact sound reduction that is laid on a flooring material on a floor of a wooden building. And having a laminated structure of an inorganic fiber layer and a viscoelastic body layer, and the inorganic fiber layer is positioned between the flooring and the viscoelastic body layer, and the thickness of the viscoelastic body layer is 4 mm. The summary is as follows.

  As described above, the floor impact sound reduction laminate is configured to be laid on a flooring, and therefore can be easily installed even in an existing wooden building. Here, in the laminated body for floor impact sound reduction which has a laminated structure of an inorganic fiber layer and a viscoelastic body layer, and the inorganic fiber layer is located between the flooring and the viscoelastic body layer, the viscoelastic body layer If the thickness exceeds 4 mm, the effect of reducing the heavy floor impact sound is difficult to increase. When the thickness of the viscoelastic body layer is 4 mm or less as described above, it is possible to reduce the weight floor impact sound while avoiding an excessive increase in the thickness of the viscoelastic body layer.

Invention of Claim 2 makes it a summary for the laminated body for floor impact sound reduction of Claim 1 that the thickness of the said viscoelastic body layer is 2 mm or more.
According to this configuration, the viscoelastic body layer can be easily molded, and the strength of the viscoelastic body layer can be easily secured.

Invention of Claim 3 makes it a summary that the thickness of the said inorganic fiber layer is the range of 10-100 mm in the laminated body for floor impact sound reduction of Claim 1 or Claim 2.
By configuring the inorganic fiber layer in this manner, the strength of the inorganic fiber layer can be easily obtained, and the overall thickness of the floor impact sound reducing laminate can be avoided.

  ADVANTAGE OF THE INVENTION According to this invention, the laminated body for floor impact sound reduction which can suppress a heavy floor impact sound in an existing wooden building and can suppress the weight increase by a viscoelastic body layer easily can be provided.

The schematic side view which shows the laminated body for floor impact sound reduction in this embodiment, and the structure of a floor structure partially. (A) is a schematic side view which shows the use condition of the laminated body for floor impact sound reduction in an Example, (b)-(d) is a schematic side view which shows the laminated structure of the floor in a comparative example. The graph which shows the relationship between the thickness of a viscoelastic body layer, and a heavy floor impact sound level.

Hereinafter, an embodiment in which the present invention is embodied in a laminate for floor impact sound reduction applied to a wooden house will be described in detail with reference to the drawings.
As shown in FIG. 1, the floor impact sound reducing laminate 11 is laid on the floor material 22 constituting the floor 21 on the second floor, thereby reducing the heavy floor impact sound transmitted to the first floor. The laminate 11 for reducing floor impact sound has a laminated structure of an inorganic fiber layer 12 and a viscoelastic body layer 13. The inorganic fiber layer 12 is positioned between the flooring 22 and the viscoelastic body layer 13. The thickness of the viscoelastic body layer 13 is 4 mm or less.

  First, the inorganic fiber layer 12 will be described. As the inorganic fiber layer 12, a molded body formed into a plate shape by a binder that binds inorganic fibers can be used. As inorganic fiber, glass wool and rock wool (artificial mineral fiber) are mentioned, for example. The thickness of the inorganic fiber layer 12 is preferably in the range of 10 to 100 mm. When the thickness of the inorganic fiber layer 12 is 10 mm or more, strength is easily obtained. On the other hand, by setting the thickness of the inorganic fiber layer 12 to 100 mm or less, it is possible to avoid an excessive increase in the overall thickness of the floor impact sound reducing laminate 11.

The density of the inorganic fiber layer 12 is preferably 40 to 300 kg / m ³ , more preferably 40 to 100 kg / m ³ , and still more preferably 64 to 96 kg / m ³ . When the density of the inorganic fiber layer 12 is 40 kg / m ³ or more, the strength is easily obtained. On the other hand, when the density of the inorganic fiber layer 12 is 300 kg / m ³ or less, it can be avoided that the floor impact sound reducing laminate is excessively heavy.

Specific examples of the inorganic fiber layer 12 include a glass wool sound absorbing material or a rock wool sound absorbing material defined in JIS A 6301: 2007.
Next, the viscoelastic body layer 13 will be described. As the viscoelastic layer 13, a viscoelastic material formed into a sheet shape is used. The viscoelastic material is preferably a viscoelastic material in a range of 0 to 41% in a rebound resilience measured at 25 ° C. using a Lüpke rebound resilience tester in accordance with JIS K 6255: 1996. A viscoelastic material in the range of -10% is more preferable, and a viscoelastic material in the range of 0-5% is more preferable.

  A viscoelastic material can be selected and used, for example from a commercially available material on the basis of the measurement result of the said resilience modulus. In addition, the viscoelastic material can be configured by blending an additive that lowers the resilience modulus of the polymer material.

  Specific examples of the polymer material include thermoplastic resins, thermosetting resins, and rubbers. Examples of the thermoplastic resin include olefin resin, ester resin, amide resin, styrene / acrylonitrile resin, acrylic resin, silicone resin, vinyl acetate resin, styrene resin, polycarbonate, polysulfone, polyphenylene ether, Polyoxymethylene, polyvinyl chloride, and polyvinylidene chloride.

Examples of the thermosetting resin include an epoxy resin, a phenol resin, an unsaturated polyester resin, a melamine resin, a urethane resin, and a urea resin.
Examples of rubbers include urethane rubber, silicone rubber, ethylene-propylene rubber, isoprene rubber, chloroprene rubber, butyl rubber, halogenated butyl rubber, polyisobutylene, acrylonitrile-butadiene rubber, styrene-butadiene rubber, acrylic rubber, and natural rubber. Can be mentioned.

As the polymer material, a single species may be used, or a plurality of species may be mixed and used. The content of the polymer material in the viscoelastic material is, for example, in the range of 50 to 70% by mass.
Specific examples of additives that reduce the rebound resilience of the polymer material are selected from, for example, benzothiazyl compounds, benzotriazole compounds, diphenyl acrylate compounds, orthophosphate compounds, and aromatic secondary amine compounds. Including at least one kind.

  Examples of the benzothiazyl compound include N, N-dicyclohexylbenzothiazyl-2-sulfenamide (DCHBSA), 2-mercaptobenzothiazole (MBT), dibenzothiazyl disulfide (MBTS), N-cyclohexylbenzothiazyl-2- Sulfenamide (CBS), Nt-butylbenzothiazyl-2-sulfenamide (BBS), N-oxydiethylenebenzothiazyl-2-sulfenamide (OBS), and N, N-diisopropylbenzothia There may be mentioned at least one selected from dil-2-sulfenamide (DPBS).

  The benzotriazole-based compound is a compound in which a benzotriazole having an azole group bonded to a benzene ring is used as a mother nucleus and a phenyl group is bonded thereto, and 2- [2′-hydroxy-3 ′-(3 ″, 4 ″, 5 ″, 6 ″ -tetrahydrophthalimidomethyl) -5′-methylphenyl] benzotriazole (2HPMMB), 2- (2′-hydroxy-5′-methylphenyl) benzotriazole (2HMPB), 2- (2 '-Hydroxy-3'-t-butyl-5'-methylphenyl) -5-chlorobenzotriazole (2HBMPCB), 2- (2'-hydroxy-3', 5'-di-t-butylphenyl) -5 -Chlorobenzotriazole (2HDBPCB) and 2- (2'-hydroxy-5'-t-octylphenyl) benzoto It includes at least one selected from azoles (2HOPB).

  Examples of the diphenyl acrylate compound include at least one selected from ethyl-2-cyano-3,3-diphenyl acrylate (ECDPA) and octyl-2-cyano-3,3-diphenyl acrylate (OCDPA).

  Examples of orthophosphate compounds include trimethyl phosphate, triethyl phosphate, tributyl phosphate, tris (2-ethylhexyl) phosphate, tris (butoxyethyl) phosphate, triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl diphenyl Examples thereof include at least one selected from phosphate and 2-ethylhexyl diphenyl phosphate.

  Examples of the aromatic secondary amine compound include p- (p-toluenesulfonylamide) diphenylamine, N, N′-di-2-naphthyl-p-phenylenediamine, N, N′-diphenyl-p-phenylenediamine, N-phenyl-N′-isopropyl-p-phenylenediamine, N-phenyl-N ′-(1,3-dimethylbutyl) -p-phenylenediamine, N-phenyl-1-naphthylamine, alkylated diphenylamine, octylated diphenylamine And at least one selected from 4,4′-bis (α, α-dimethylbenzyl) diphenylamine.

Content of the said additive in a viscoelastic material becomes like this. Preferably it is 3-30 mass%, More preferably, it is 5-30 mass%, More preferably, it is 10-30 mass%.
The viscoelastic material may contain a filler, a flame retardant, a corrosion inhibitor, a colorant, a dispersant, a wetting agent, and the like as necessary in addition to the above additives.

  A viscoelastic body having a sheet shape can be obtained by molding the above-described viscoelastic material by a method such as extrusion molding or roll molding. The viscoelastic body may be configured as a non-foamed body, or may be configured as a foamed body by containing a foaming material in the viscoelastic material, for example. In this embodiment, the viscoelastic body (the viscoelastic body layer 13) is configured as a non-foamed body, so that strength is easily ensured.

  When the thickness of the viscoelastic body is 4 mm or less, the viscoelastic body layer 13 can be used. The thickness of the viscoelastic body layer 13 is 2 mm or more from the viewpoint that the viscoelastic body forming a sheet shape, that is, the viscoelastic body layer 13 can be easily molded and the strength of the viscoelastic body layer 13 is easily secured. It is preferable.

  The laminated body 11 for reducing floor impact sound is formed by placing a viscoelastic body layer 13 on the upper surface of the inorganic fiber layer 12. The viscoelastic body layer 13 is provided so as to cover the entire top surface of the inorganic fiber layer 12. Thereby, the upper surface of the inorganic fiber layer 12 is protected by the viscoelastic body layer 13, thereby suppressing the scattering of inorganic fibers contained in the inorganic fiber layer 12.

  Next, the floor 21 and its surrounding structure will be described. The floor 21 shown in FIG. 1 is a second floor 21 in a wooden house by a frame wall construction method. The floor 21 has a structure in which an underlay 23, an ALC panel 24, and a floor material 22 are laminated in this order on a joist 32 attached perpendicular to the floor beam 31.

  The underlay 23 is made of a structural plywood stipulated in the Japanese Agricultural Standard (JAS). The ALC panel 24 is a panel made of autoclaved lightweight aerated concrete (ALC), and a flat panel described in JIS A 5416: 2007 is used. The flooring 22 is composed of a wooden flooring. The wooden floor material is not particularly limited, and may be, for example, a single layer structure or a multilayer structure.

  The floor beam 31 is provided with a field edge 43 through a hanging tree 41 and a field edge receiver 42, and a ceiling material 44 is provided at the field edge 43. As the material of the ceiling material 44, for example, wood, resin material, plaster, or the like is used. Here, a launch ceiling is shown as an example, but it may be changed to, for example, a fringed ceiling. Further, in FIG. 1, connection members (nails, screws, and the like) that connect the members, wall materials arranged around the floor 21, and the like are omitted.

Then, the usage method of the laminated body 11 for floor impact sound reduction is demonstrated with an effect | action.
The laminated body 11 for floor impact sound reduction is installed by laminating the inorganic fiber layer 12 and the viscoelastic body layer 13 in this order on the floor material 22. Thus, the floor impact sound reducing laminate 11 can be installed without peeling off the floor material 22 in an existing wooden house. At this time, since the inorganic fiber layer 12 is installed without being fixed on the flooring 22, when the floor impact noise reduction is not necessary, the floor impact noise reduction laminate 11 is placed on the flooring 22. Can be easily removed. At this time, since the viscoelastic body layer 13 is placed without being bonded to the inorganic fiber layer 12, for example, it is easy to replace only the viscoelastic body layer 13 with a new viscoelastic body layer 13.

  On the floor impact sound reducing laminate 11 laid in this way, for example, when a child jumps, an impact is applied to the floor impact sound reducing laminate 11. At this time, as a result of the impact energy being converted into thermal energy by the viscoelasticity of the viscoelastic body layer 13 and the viscosity of the air contained in the inorganic fiber layer 12, the heavy floor impact sound transmitted downstairs is reduced. Here, when the thickness of the viscoelastic body layer 13 exceeds 4 mm, it is difficult to increase the effect of reducing the heavy floor impact sound. For this reason, when the thickness of the viscoelastic body layer 13 is 4 mm or less, it is possible to reduce the weight floor impact sound while avoiding an excessive increase in the thickness of the viscoelastic body layer 13.

The effects exhibited by this embodiment will be described below.
(1) Since the laminated body 11 for floor impact sound reduction is configured to be laid on the floor material 22, it can be easily installed even in an existing wooden house. When the thickness of the viscoelastic body layer 13 is 4 mm or less, it is possible to reduce the weight floor impact sound while avoiding an excessive increase in the thickness of the viscoelastic body layer 13. Therefore, it is possible to provide the floor impact sound reducing laminate 11 that can easily reduce the weight floor impact sound in the existing floor 21 and suppress the weight increase due to the viscoelastic body layer 13.

  In this way, according to the floor impact sound reducing laminate 11 laid on the floor material 22, the floor impact sound reducing laminate 11 can be installed or moved to a place where the heavy floor impact noise needs to be reduced. Easy. Further, when it is no longer necessary to reduce the heavy floor impact sound, it is easy to remove the floor impact sound reducing laminate from the floor material 22. For this reason, for example, it is possible to easily take measures against heavy floor impact sound in accordance with movement of a child room, installation location of a home game machine, or the like.

  (2) When the thickness of the viscoelastic body layer 13 is 2 mm or more, the viscoelastic body layer 13 can be easily molded, and the strength of the viscoelastic body layer 13 is easily secured. Since the strength of the viscoelastic body layer 13 is easily secured, durability is easily obtained when the laminate 11 for reducing floor impact sound is used.

  (3) When the thickness of the inorganic fiber layer 12 is in the range of 10 to 100 mm, the strength of the inorganic fiber layer 12 is easily obtained, and the overall thickness of the laminate 11 for reducing floor impact sound is excessively thick. Can be avoided. In particular, since the laminate 11 for floor impact sound reduction is laid on the floor material 22, the thickness of the inorganic fiber layer 12 tends to increase, thereby causing a feeling of pressure on the ceiling. In this regard, such a feeling of pressure can be suppressed by setting the thickness of the inorganic fiber layer 12 to 100 mm or less.

The embodiment may be modified as follows.
The floor impact sound reducing laminate 11 is configured by placing the viscoelastic body layer 13 on the upper surface of the inorganic fiber layer 12, but between the inorganic fiber layer 12 and the viscoelastic body layer 13. You may change to the structure which adhere | attached these inorganic fiber layers 12 and the viscoelastic body layer 13 by providing an contact bonding layer.

  -Although the said inorganic fiber layer 12 is mounted and used on the flooring 22, it adheres the inorganic fiber layer 12 to the upper surface of the flooring 22 by providing an adhesion layer in the lower surface of the inorganic fiber layer 12. Can also be used.

The upper surface of the viscoelastic body layer 13 is used in an exposed state, but a layer for the purpose of decoration, protection or the like may be laminated on the upper surface of the viscoelastic body layer 13.
The inorganic fiber layer 12 and the viscoelastic body layer 13 each have a single layer structure, but at least one of the inorganic fiber layer 12 and the viscoelastic body layer 13 may have a multilayer structure. However, the viscoelastic body layer 13 preferably has a single-layer structure from the viewpoint of easy molding.

  The viscoelastic body layer 13 is provided so as to cover the entire top surface of the inorganic fiber layer 12. For example, by forming the outer shape of the viscoelastic body layer 13 to be smaller than the inorganic fiber layer 12, inorganic fibers You may change into the structure which a part of layer 12 exposes.

The laminated body 11 for floor impact noise reduction may be used, for example, by being laid on the floor material 22 of the entire room, or may be partially laid on the floor material 22 of the room.
-The wooden house where the laminated body 11 for floor impact sound reduction is applied is not specifically limited, For example, the wooden house by a wooden frame construction method may be sufficient. Further, the floor structure to which the laminate 11 for reducing the floor impact sound is applied is not limited to the structure of the floor 21. For example, the floor 23 having the structure in which the ALC panel 24 is omitted, the underlay 23 without the joist 32 is provided. You may apply to the floor of the structure fixed on the floor beam 31. FIG.

  The floor impact sound reducing laminate 11 is applied to the floor material 22 in the room, but may be applied to a floor material in a hallway, for example. Moreover, although the said laminated body 11 for floor impact sound reduction is applied to the floor material 22 of the second floor, it can be applied suitably to the floor material of the upper floor, ie, the second floor or more.

The laminated body 11 for reducing floor impact sound is not limited to a wooden house, but can be applied as a measure against heavy floor impact sound in a wooden building having a hall or studio on the floor.
Next, the technical idea that can be grasped from the above embodiment will be described below.

  (A) The viscoelastic body layer is composed of a viscoelastic material of 0 to 41% in a rebound resilience measured at 25 ° C. using a Lupke rebound resilience tester in accordance with JIS K 6255: 1996. Laminated body for floor impact sound reduction.

(B) The viscoelastic layer is a laminate for floor impact sound reduction that covers the entire top surface of the inorganic fiber layer.
(C) The inorganic fiber layer is a laminate for reducing floor impact sound, which is composed of a glass wool sound absorbing material or a rock wool sound absorbing material specified in JIS A 6301: 2007.

(D) The floor impact sound reducing laminate having a density of the inorganic fiber layer of 40 to 300 kg / m ³ .
(E) A laminate for reducing floor impact sound laid on a floor material as an upper layer of an ALC panel.

  (F) A floor structure comprising a floor material on a floor of a wooden building and a laminate for floor impact sound reduction provided on the floor material, wherein the laminate for floor impact sound reduction is a viscoelastic body. A layered structure of a layer and an inorganic fiber layer, wherein the inorganic fiber layer is positioned between the flooring and the viscoelastic body layer, and the thickness of the viscoelastic body layer is 4 mm or less. Floor structure characterized by.

Next, the embodiment will be described more specifically with reference to examples and comparative examples.
Example 1
By preparing a viscoelastic material obtained by mixing 25 parts by mass of ethyl-2-cyano-3,3-diphenylacrylate with 75 parts by mass of an epoxy resin (manufactured by Nagase ChemteX Corporation), and molding the viscoelastic material, A viscoelastic body having a sheet shape with a thickness of 2 mm was obtained. The rebound resilience of the viscoelastic material used here is 3%.

By superposing the obtained viscoelastic body on a glass wool board (paramount glass industry, manufactured by Paramount Glass Industry Co., Ltd., thickness 25 mm, density 64 kg / m ³ ) as the inorganic fiber layer 12, a viscoelastic body having a thickness of 2 mm. A floor impact sound reducing laminate 11 having a layer 13 was produced.

In the experimental house of the frame wall construction method having the floor shown in FIG. 1 (floor area of the sound source room and the sound receiving room: 3.6 m × 3.6 m), the floor impact sound reduction laminate on the floor material of the sound source room Laying the body.
FIG. 2A shows an outline of the laminated structure of the floor portion. The underlay 23 is a second-class structural plywood (thickness 12 mm), and the ALC panel 24 is a flat panel (thickness 36 mm, density defined in JIS A 5416: 2007: 500 kg / m ³ ).

  Next, the maximum sound pressure level (dB) of the heavy floor impact sound was measured. In this measurement, in accordance with JIS A 1418-2: 2000 "Measurement method of floor impact sound insulation performance of buildings-Part 2: Method using standard weight shock source", a bung machine is generally used as a weight shock source. The average value of the maximum sound pressure level (dB) at a low frequency (63 Hz) that is difficult to reduce was calculated. The results are shown in the “heavy floor impact sound level (dB)” column of Table 1.

(Example 2)
Except having changed the thickness of the viscoelastic body layer 13 into 4 mm, the laminated body 11 for floor impact sound reduction was produced similarly to Example 1, and the average value of the maximum sound pressure level (dB) in 63 Hz was computed. The results are shown in the “heavy floor impact sound level (dB)” column of Table 1.

(Comparative Example 1)
Except that the thickness of the viscoelastic layer 53 is changed to 20 mm as shown in FIG. 2 (b), the floor impact sound reduction laminate 51 is prepared and the maximum sound pressure level at 63 Hz is obtained, as in Example 1. The average value of (dB) was calculated. The results are shown in the “heavy floor impact sound level (dB)” column of Table 1.

(Comparative Example 2)
In Comparative Example 2, the average value of the maximum sound pressure level (dB) at 63 Hz is the same as in Example 1 except that only the inorganic fiber layer 12 is laid on the flooring 22 as shown in FIG. Was calculated. The results are shown in the “heavy floor impact sound level (dB)” column of Table 1.

(Comparative Example 3)
In Comparative Example 3, as shown in FIG. 2D, the maximum sound pressure level (dB) at 63 Hz is the same as in Example 1 except that only the viscoelastic body layer 53 having a thickness of 20 mm is laid on the flooring material. The average value of was calculated. The results are shown in the “heavy floor impact sound level (dB)” column of Table 1.

(Comparative Example 4)
In Comparative Example 4, the average value of the maximum sound pressure level (dB) at 63 Hz was calculated in the same manner as in Example 1 for the case where nothing was provided on the flooring. The results are shown in the “heavy floor impact sound level (dB)” column of Table 1.

表１に示されるように、各実施例の重量床衝撃音レベルは、各比較例よりも低減されていることが分かる。ここで、図３には、粘弾性体層の厚みと床衝撃音レベルとの関係をグラフで示している。同グラフから、粘弾性体層の厚みが４ｍｍ以下であると、重量床衝撃音レベルを低減する効果が高いことが分かる。

As shown in Table 1, it can be seen that the heavy floor impact sound level of each example is lower than that of each comparative example. FIG. 3 is a graph showing the relationship between the thickness of the viscoelastic body layer and the floor impact sound level. From the graph, it can be seen that when the thickness of the viscoelastic layer is 4 mm or less, the effect of reducing the heavy floor impact sound level is high.

  DESCRIPTION OF SYMBOLS 11 ... Laminated body for floor impact sound reduction, 12 ... Inorganic fiber layer, 13 ... Viscoelastic body layer, 22 ... Floor material.

Claims (3)

A laminate for reducing floor impact sound laid on a flooring material on a floor of a wooden building, having a laminated structure of an inorganic fiber layer and a viscoelastic material layer, wherein the inorganic fiber layer is the flooring material And the viscoelastic body layer, and the thickness of the viscoelastic body layer is 4 mm or less. The laminate for floor impact sound reduction according to claim 1, wherein the viscoelastic body layer has a thickness of 2 mm or more. The laminate for floor impact sound reduction according to claim 1 or 2, wherein the inorganic fiber layer has a thickness in a range of 10 to 100 mm.

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