JP2018096083A - Soundproof floor structure - Google Patents

Soundproof floor structure Download PDF

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JP2018096083A
JP2018096083A JP2016240540A JP2016240540A JP2018096083A JP 2018096083 A JP2018096083 A JP 2018096083A JP 2016240540 A JP2016240540 A JP 2016240540A JP 2016240540 A JP2016240540 A JP 2016240540A JP 2018096083 A JP2018096083 A JP 2018096083A
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floor
sealing material
floor member
sound
soundproof
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JP6918478B2 (en
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弘之 中瀬
Hiroyuki Nakase
弘之 中瀬
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Daiwa House Industry Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a soundproof floor structure to suppress the solid propagation of sound of a building floor.SOLUTION: The soundproof floor structure suppresses the solid propagation of sound of a floor 1 of a building, and can be applied to a toilet 2 provided with a toilet bowl 2a. The floor 1 is, for example, a first floor made of a wood-based material, wherein a first floor member 11 serving as a specific area and a second floor member 12 serving as a peripheral area located around the first floor member 11 are separated and insulated. A sealant 4 having an elastic restoration rate of 60% or more and 95% or less is filled in the insulated portion.SELECTED DRAWING: Figure 1

Description

この発明は、生活音等に対する防音性能を有する防音床構造に関する。   The present invention relates to a soundproof floor structure having soundproofing performance against living sounds and the like.

特許文献１に記載の床構造は、互いに平行配置された横梁の上面よりも低い位置の対向面に、内出部がそれぞれ突設され、各内出部の上面でＡＬＣ床板の両端がそれぞれ支持されており、各内出部は、横梁間に架け渡された状態のＡＬＣ床板の上面が横梁の上面とほぼ面一となるような上下配置で、各横梁の対向面に突設されている。そして、ＡＬＣ床板と横梁の隙間には、シリコーンシール材が充填されている。   In the floor structure described in Patent Document 1, inward protruding portions are respectively provided on opposing surfaces lower than the upper surfaces of the lateral beams arranged in parallel to each other, and both ends of the ALC floor board are supported by the upper surface of each inward protruding portion, respectively. Each protruding portion is vertically arranged so that the upper surface of the ALC floor board spanned between the horizontal beams is substantially flush with the upper surface of the horizontal beams, and protrudes from the opposite surface of each horizontal beam. . A gap between the ALC floor plate and the cross beam is filled with a silicone sealing material.

特開平１１−９３３１３号公報Japanese Patent Laid-Open No. 11-93313

しかしながら、上記特許文献１に記載の床構造は、シリコーンシール材をＡＬＣ床板と横梁の隙間に充填することで、この隙間を塞いで空気伝搬音が遮断されるものの、上記シリコーンシール材によって音の固体伝搬が発生するため、十分な防音性が得られるものではないと思われる。   However, although the floor structure described in Patent Document 1 fills the gap between the ALC floor plate and the cross beam with the silicone sealing material to close the gap to block the air propagation sound, Since solid propagation occurs, it seems that sufficient sound insulation is not obtained.

この発明は、上記の事情に鑑み、建物床の音の固体伝搬を抑制する防音床構造を提供することを課題とする。   This invention makes it a subject to provide the soundproof floor structure which suppresses the solid propagation of the sound of a building floor in view of said situation.

この発明の防音床構造は、上記の課題を解決するために、建物の床部材による音の固体伝搬を抑制する防音床構造であって、床部材同士が縁切りされており、上記縁切りされた箇所に弾性復元率が６０％以上で９５％以下であるシーリング材が充填されていることを特徴とする。   In order to solve the above-described problem, the soundproof floor structure of the present invention is a soundproof floor structure that suppresses the solid sound propagation by the floor member of the building, and the floor members are cut out from each other, and the edge cut out portion It is characterized by being filled with a sealing material having an elastic recovery rate of 60% or more and 95% or less.

上記の構成であれば、上記床部材同士が縁切りされたので、例えば、或る箇所において発生した音が、床を媒介した固体伝搬によって周囲に伝搬していくのを抑制することができる。そして、上記縁切りされた箇所には、シーリング材が充填されるので、隙間による音の空気伝搬も抑制されることになる。さらに、上記シーリング材は、その弾性復元率が９５％以下であるため、シーリング材による音の固体伝搬が抑制されることになる。すなわち、折角、縁切りがされたことによる音の固体伝搬の抑制が上記シーリング材で阻害されるのを、上記シーリング材の弾性復元率を９５％以下とすることで極力防止することができる。   If it is said structure, since the said floor members were cut off, it can suppress that the sound which generate | occur | produced in a certain location propagates to the circumference | surroundings by the solid propagation which mediated the floor, for example. And since the sealing material is filled in the edge-cut portion, sound air propagation through the gap is also suppressed. Furthermore, since the elastic restoring rate of the sealing material is 95% or less, the solid propagation of sound by the sealing material is suppressed. That is, it is possible to prevent the suppression of the sound solid propagation due to the bending or cutting of the edges by the sealing material by setting the elastic restoring rate of the sealing material to 95% or less as much as possible.

上記シーリング材の伸び率が５５０％以上であってもよい。これによれば、上記床部材同士の間で位置変位が生じたとしても、上記の伸び率により、上記シーリング材において亀裂等は生じにくく、また、上記床部材を安定的に位置させることができる。   The elongation of the sealing material may be 550% or more. According to this, even if a positional displacement occurs between the floor members, cracks and the like are hardly generated in the sealing material due to the elongation rate, and the floor member can be stably positioned. .

上記シーリング材の硬度が２０度以下であってもよい。これによれば、シーリング材による音の固体伝搬をさらに抑制することができる。   The sealing material may have a hardness of 20 degrees or less. According to this, the solid propagation of sound by the sealing material can be further suppressed.

上記床部材は木質系材料からなっていてもよい。或いは、上記床部材は軽量発泡コンクリートからなっていてもよい。   The floor member may be made of a wooden material. Alternatively, the floor member may be made of lightweight foamed concrete.

上記床部材の特定領域が、当該特定領域の周囲に位置する周囲領域の床部材から縁切りされており、上記特定領域には便器が設置されていてもよい。   The specific region of the floor member may be cut off from the floor member in the peripheral region located around the specific region, and a toilet may be installed in the specific region.

本発明であれば、床部材同士の縁切りによって音の固体伝搬を抑制し、また、シーリング材によって上記縁切りによる隙間を塞いで音の空気伝搬を抑制するとともに、上記縁切りによる音の固体伝搬を上記シーリング材が阻害しないようにしたので、建物床の防音性能を向上できるという効果を奏する。   According to the present invention, the solid propagation of sound is suppressed by edge cutting between floor members, and the air propagation of sound is suppressed by closing the gap due to the edge cutting by a sealing material, and the solid propagation of sound by the edge cutting is described above. Since the sealing material is not disturbed, the soundproof performance of the building floor can be improved.

本発明の実施形態に係る防音床構造を有するトイレを示した説明図である。It is explanatory drawing which showed the toilet which has a soundproof floor structure which concerns on embodiment of this invention. 図１のトイレの便器が設置された特定領域とその周囲領域等の概略を立体的に示した説明図である。It is explanatory drawing which showed the outline of the specific area | region in which the toilet bowl of the toilet of FIG. 1 was installed, its surrounding area, etc. in three dimensions. 図２の特定領域をなす床部を上下反転させて示した説明図である。It is explanatory drawing which turned up and down and showed the floor part which makes the specific area | region of FIG. 本発明の他の実施形態に係る防音床構造を有するＡＬＣ床を示した説明図である。It is explanatory drawing which showed the ALC floor which has a soundproof floor structure concerning other embodiment of this invention.

以下、この発明の実施の形態を添付図面に基づいて説明する。
図１に示すように、この実施形態の防音床構造は、建物の床１による音の固体伝搬を抑制する防音床構造であり、例えば、便器２ａを備えるトイレ２において適用することができる。 Embodiments of the present invention will be described below with reference to the accompanying drawings.
As shown in FIG. 1, the soundproof floor structure of this embodiment is a soundproof floor structure that suppresses solid sound propagation by the floor 1 of the building, and can be applied to, for example, a toilet 2 including a toilet 2a.

上記床１は、例えば、木質系材料からなる１階床であり、特定領域となる第１床部材１１と、この第１床部材１１の周囲に位置する周囲領域となる第２床部材１２とが分離されて縁切りされている。   The floor 1 is, for example, a first floor made of a wood-based material, a first floor member 11 serving as a specific area, and a second floor member 12 serving as a peripheral area located around the first floor member 11. Are separated and trimmed.

上記第１床部材１１上に上記便器２ａが設置されている。この便器２ａにおける配管２ｂは、上記第１床部材１１を貫通して床下に出されている。また、上記トイレ２を仕切る仕切り壁２１は、上記第２床部材１２上において設置される。   The toilet 2 a is installed on the first floor member 11. The pipe 2b in the toilet bowl 2a passes through the first floor member 11 and extends under the floor. The partition wall 21 that partitions the toilet 2 is installed on the second floor member 12.

上記第１床部材１１は、図２および図３にも示すように、例えば、６００ｍｍ角の大きさの正方形板とされており、床下側に設けられた床束３によって支持されている。同様に、上記第２床部材１２も床束３によって支持されている。上記床束３によって床板下の大引き１０(図１参照)を支持する場合、この大引き１０を、上記第１床部材１１から上記第２床部材１２に渡さずに、上記縁切りの箇所において分断しておく。なお、図２および図３では、大引きの図示を省略している。   As shown in FIGS. 2 and 3, the first floor member 11 is a square plate having a size of 600 mm square, for example, and is supported by the floor bundle 3 provided on the lower side of the floor. Similarly, the second floor member 12 is also supported by the floor bundle 3. When supporting the large pull 10 (see FIG. 1) below the floorboard by the floor bundle 3, the large pull 10 is not passed from the first floor member 11 to the second floor member 12, but at the edge cut portion. Divide it. In FIGS. 2 and 3, the drawing of the large pull is omitted.

上記縁切りの箇所には、弾性復元率が６０％以上で９５％以下(望ましくは、６０％以上で９０％以下)であるシーリング材４が充填されている。上記弾性復元率の値は、ＪＩＳＡ５７５８（Ｇ−３０ＳＬＭ）に基づくものとする。また、上記シーリング材４としては、１成分形室温硬化タイプのオキシム型シリコンシーラント、有機系弾性シーリング材等からなるものを用いることができる。   The edge cutting portion is filled with a sealing material 4 having an elastic recovery rate of 60% or more and 95% or less (preferably 60% or more and 90% or less). The value of the elastic recovery rate is based on JISA5758 (G-30SLM). Further, as the sealant 4, a one-component room temperature curing type oxime type silicone sealant, an organic elastic sealant, or the like can be used.

また、上記シーリング材４は、その伸び率が５５０％以上である。上記伸び率の値は、ＪＩＳＡ５７５８に基づくものとする。   Moreover, the said sealing material 4 has the elongation rate of 550% or more. The elongation rate value is based on JISA5758.

また、上記シーリング材４は、その硬度（ＪＩＳタイプＡ）が２０度以下である。上記硬度の値は、ＪＩＳＫ６２４９に基づくものとする。   The sealing material 4 has a hardness (JIS type A) of 20 degrees or less. The hardness value is based on JISK6249.

上記の構成であれば、上記第１、第２床部材１１，１２同士が縁切りされたので、例えば、上記第１床部材１１の箇所において発生した音が、床を媒介とした固体伝搬によって周囲に伝搬していくのを抑制することができる。そして、上記縁切りされた箇所には、上記シーリング材４が充填されるので、隙間による音の空気伝搬も抑制されることになる。さらに、上記シーリング材４は、その弾性復元率が９５％以下であるため、このシーリング材４による音の固体伝搬が抑制されることになる。すなわち、折角、縁切りがされたことによる音の固体伝搬の抑制がシーリング材で阻害されるのを、上記シーリング材４が９５％以下の弾性復元率を有することで極力防止できたものである。もちろん、上記シーリング材４の弾性復元率を望ましくは９０％以下とすることで、縁切り箇所での音の固体伝搬をさらに抑制できる。   If it is said structure, since said 1st, 2nd floor members 11 and 12 were cut off, for example, the sound generated in the location of said 1st floor member 11 is a circumference | surroundings by the solid propagation which made the floor the medium. Propagation to the can be suppressed. And since the said sealing material 4 is filled in the said edge-cut location, the sound air propagation by a clearance gap will also be suppressed. Furthermore, since the elastic restoring rate of the sealing material 4 is 95% or less, the solid propagation of sound by the sealing material 4 is suppressed. That is, it is possible to prevent as much as possible that the sealing material 4 has an elastic recovery rate of 95% or less from inhibiting the solid propagation of the sound due to the bending and the edge cutting. Of course, when the elastic restoring rate of the sealing material 4 is desirably 90% or less, it is possible to further suppress the solid propagation of sound at the edge cut portion.

上記シーリング材４の伸び率が５５０％以上であると、上記第１、第２床部材１１，１２同士の間で位置変位が生じたとしても、上記の伸び率により、上記シーリング材４において亀裂等は生じにくくなり、また、上記第１床部材１１を安定的に位置させることができる。   Even if a positional displacement occurs between the first and second floor members 11 and 12 when the elongation rate of the sealing material 4 is 550% or more, cracks are generated in the sealing material 4 due to the elongation rate. Etc. are less likely to occur, and the first floor member 11 can be positioned stably.

上記シーリング材４の硬度が２０度以下であると、このシーリング材４による音の固体伝搬をさらに抑制することができる。   If the hardness of the sealing material 4 is 20 degrees or less, solid propagation of sound by the sealing material 4 can be further suppressed.

図１のように構成されたトイレ２の遮音性能を振動加速度レベルにより計測した。具体的には、振動ピックアップを上記トイレ２の外側となる上記第２床部材１２上にセットし、洗浄ボトル内から押し出した水を上記便器２ａ内の溜水に落とし入れた。上記便器２ａ内に水が落とし入れられると、小便の行為時に生じる音と同等の略５００Ｈｚの周波数を中心とする音が発生することになる。水の落とし入れを１０秒間行い、その間の振動加速度レベルの平均値を調べた。なお、振動加速度レベルと音圧との間には相関があり、振動加速度レベルが高ければ音圧も高いといえる。   The sound insulation performance of the toilet 2 configured as shown in FIG. 1 was measured based on the vibration acceleration level. Specifically, a vibration pickup was set on the second floor member 12 on the outside of the toilet 2, and the water pushed out from the cleaning bottle was dropped into the stored water in the toilet 2a. When water is dropped into the toilet 2a, a sound centered at a frequency of about 500 Hz, which is equivalent to the sound generated when a urine is acted, is generated. Water was dropped for 10 seconds, and the average value of vibration acceleration level during that time was examined. Note that there is a correlation between the vibration acceleration level and the sound pressure, and it can be said that the sound pressure is high if the vibration acceleration level is high.

上記計測において、上記シーリング材４として、上記の弾性復元率（Ｇ−３０ＳＬＭ）が９０、伸び率が５５０％、硬度が１８度の１成分形室温硬化タイプのオキシム型シリコンシーラントを用いた。また、比較用のシーリング材Ａとして、弾性復元率が９７、伸び率が４８０％、硬度が３２度の１成分形室温硬化タイプのオキシム型シリコンシーラントを用い、比較用のシーリング材Ｂとして、弾性復元率が９９、伸び率が６５８％、硬度が１２度の１成分形室温硬化タイプのオキシム型シリコンシーラントを用いた。   In the above measurement, as the sealing material 4, a one-component room temperature curing type oxime type silicon sealant having the above-mentioned elastic recovery rate (G-30SLM) of 90, elongation of 550%, and hardness of 18 degrees was used. In addition, as a comparative sealing material A, an oxime type silicon sealant of a one-component room temperature curing type having an elastic recovery rate of 97, an elongation rate of 480%, and a hardness of 32 degrees is used as a comparative sealing material B. A one-component room temperature curing type oxime type silicone sealant having a restoration rate of 99, an elongation rate of 658%, and a hardness of 12 degrees was used.

ここで、縁切りした場合には、縁切りしない場合に比べて音圧レベルが約５デシベル小さくなった。しかし、上記計測において、上記比較用のシーリング材Ａおよび上記比較用のシーリング材Ｂを用いた時の音圧レベルは、縁切りしない場合と同等であった。一方、上記シーリング材４を用いたときの音圧レベルは、縁切りしない場合と比べて約５デシベル小さくなった。このように、折角、縁切りがされたことによる音の固体伝播の抑制がシーリング材で阻害されるのを、上記シーリング材４を用いることにより極力防止することができた。   Here, when the edge was cut, the sound pressure level was reduced by about 5 decibels compared to the case where the edge was not cut. However, in the above measurement, the sound pressure level when the comparative sealing material A and the comparative sealing material B were used was the same as when no edge cutting was performed. On the other hand, the sound pressure level when using the sealing material 4 was reduced by about 5 decibels compared to the case where the edge was not cut. As described above, the use of the sealing material 4 can prevent the suppression of the solid propagation of the sound due to the bending and the edge cutting by the sealing material 4 as much as possible.

次に他の実施形態の床構造について説明していく。図４に示すように、建物の床６を構成する第１床部材６１と第２床部材６２とは、隙間をおいてＨ鋼梁６３の上フランジ上の載せられており、それぞれ、固定金具６４によって上記Ｈ鋼梁６３の上フランジに固定されている。すなわち、上記第１床部材６１と上記第２床部材６２とは、縁切りされて分離された状態でそれぞれ上記Ｈ鋼梁６３に固定されている。上記第１床部材６１および上記第２床部材６２は、例えば、軽量発泡コンクリート（ＡＬＣ）からなる。また、上記第１床部材６１および上記第２床部材６２と上記Ｈ鋼梁６３との間には、板状の防振ゴム６５が設けられている。また、上記第１床部材６１および上記第２床部材６２の上には床仕上げ材６６が敷かれている。なお、床部材は、木やＡＬＣの他、プレキャストコンクリートや打設コンクリート等とすることができる。   Next, a floor structure according to another embodiment will be described. As shown in FIG. 4, the first floor member 61 and the second floor member 62 constituting the floor 6 of the building are placed on the upper flange of the H steel beam 63 with a gap between them. 64 is fixed to the upper flange of the H steel beam 63. That is, the first floor member 61 and the second floor member 62 are respectively fixed to the H steel beam 63 in a state where the first floor member 61 and the second floor member 62 are separated by cutting. The first floor member 61 and the second floor member 62 are made of, for example, lightweight foamed concrete (ALC). In addition, a plate-shaped anti-vibration rubber 65 is provided between the first floor member 61 and the second floor member 62 and the H steel beam 63. A floor finishing material 66 is laid on the first floor member 61 and the second floor member 62. The floor member may be precast concrete, cast concrete, or the like, in addition to wood and ALC.

なお、建物の１フロアの床６を構成する各床部材（ＡＬＣ等）間の全てに隙間を形成してもよいし、或る部屋を構成する一群の床部材同士の間には隙間を設けずに床材同士を接触させ、この或る部屋の隣の空間(部屋、廊下等)を構成する床部材との間にだけ隙間を設けるようにしてもよいものである。もちろん、このような隙間は、シーリングが行える幅に設定される。   Note that a gap may be formed between all floor members (ALC, etc.) constituting the floor 6 of one floor of the building, or a gap is provided between a group of floor members constituting a certain room. Instead, the floor materials may be brought into contact with each other, and a gap may be provided only between the floor members constituting the space (room, hallway, etc.) adjacent to the certain room. Of course, such a gap is set to a width that allows sealing.

そして、上記隙間(縁切り箇所)には、上記シーリング材４が充填される。このような構造を有する床構造とすることで或る床部材の箇所において発生した音が、固体伝搬によって他の床部材に伝搬していくのを抑制することができる。そして、上記シーリング材４は、その弾性復元率が９５％以下であるため、このシーリング材４による音の固体伝搬が抑制されることになる。すなわち、折角、縁切りがされたことによる音の固体伝搬の抑制がシーリング材で阻害されるのを、上記シーリング材４が９５％以下の弾性復元率を有することで極力防止することができた。   And the said sealing material 4 is filled in the said clearance gap (edge cutting location). By setting it as the floor structure which has such a structure, it can suppress that the sound which generate | occur | produced in the location of a certain floor member propagates to another floor member by solid propagation. And since the elastic restoring rate of the said sealing material 4 is 95% or less, the solid propagation of the sound by this sealing material 4 will be suppressed. That is, it was possible to prevent as much as possible that the sealing material 4 has an elastic recovery rate of 95% or less, which suppresses the suppression of the solid propagation of sound due to the bending and the edge cutting.

以上、図面を参照してこの発明の実施形態を説明したが、この発明は、図示した実施形態のものに限定されない。図示した実施形態に対して、この発明と同一の範囲内において、あるいは均等の範囲内において、種々の修正や変形を加えることが可能である。   As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

１ ：床
１０ ：大引き
１１ ：第１床部材
１２ ：第２床部材
２ ：トイレ
２ａ ：便器
２ｂ ：配管
２１ ：仕切り壁
３ ：床束
４ ：シーリング材
６ ：床
６１ ：第１床部材
６２ ：第２床部材
６３ ：Ｈ鋼梁
６４ ：固定金具
６５ ：防振ゴム
６６ ：床仕上げ材 1: Floor 10: Large pull 11: First floor member 12: Second floor member 2: Toilet 2a: Toilet 2b: Piping 21: Partition wall 3: Floor bundle 4: Sealing material 6: Floor 61: First floor member 62 : Second floor member 63: H steel beam 64: Fixing bracket 65: Anti-vibration rubber 66: Floor finish material

Claims (6)

建物の床部材による音の固体伝搬を抑制する防音床構造であって、床部材同士が縁切りされており、上記縁切りされた箇所に弾性復元率が６０％以上で９５％以下であるシーリング材が充填されていることを特徴とする防音床構造。   A soundproof floor structure that suppresses sound solid propagation by a floor member of a building, wherein the floor members are cut off, and a sealing material having an elastic recovery rate of 60% to 95% at the cut edge Soundproof floor structure, characterized by being filled. 請求項１に記載の防音床構造において、上記シーリング材の伸び率が５５０％以上であることを特徴とする防音床構造。   The soundproof floor structure according to claim 1, wherein the sealing material has an elongation percentage of 550% or more. 請求項１または請求項２に記載の防音床構造において、上記シーリング材の硬度が２０度以下であることを特徴とする防音床構造。   The soundproof floor structure according to claim 1 or 2, wherein the sealing material has a hardness of 20 degrees or less. 請求項１〜請求項３のいずれか１項に記載の防音床構造において、上記床部材は木質系材料からなることを特徴とする防音床構造。   The soundproof floor structure according to any one of claims 1 to 3, wherein the floor member is made of a wood-based material. 請求項１〜請求項３のいずれか１項に記載の防音床構造において、上記床部材は軽量発泡コンクリートからなることを特徴とする防音床構造。   The soundproof floor structure according to any one of claims 1 to 3, wherein the floor member is made of lightweight foamed concrete. 請求項１〜請求項５のいずれか１項に記載の防音床構造において、上記床部材の特定領域が、当該特定領域の周囲に位置する周囲領域の床部材から縁切りされており、上記特定領域には便器が設置されることを特徴とする防音床構造。   The soundproof floor structure according to any one of claims 1 to 5, wherein the specific region of the floor member is cut off from a floor member in a peripheral region located around the specific region, and the specific region The soundproof floor structure is characterized by having a toilet.
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JPH09227858A (en) * 1996-02-23 1997-09-02 Bridgestone Corp Sealing material
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JP2011256673A (en) * 2010-06-11 2011-12-22 Kumagai Gumi Co Ltd Floor structure
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06299686A (en) * 1993-04-15 1994-10-25 Matsushita Electric Works Ltd Laying structure of floor material
JPH09227858A (en) * 1996-02-23 1997-09-02 Bridgestone Corp Sealing material
JP2001247849A (en) * 2000-03-06 2001-09-14 Kanegafuchi Chem Ind Co Ltd Sealing material composition for siding board
JP2004107932A (en) * 2002-09-17 2004-04-08 Pal Co Ltd Joint processing method for external wall
JP2005016103A (en) * 2003-06-25 2005-01-20 Hayakawa Rubber Co Ltd Soundproof floor structure
JP2008095317A (en) * 2006-10-09 2008-04-24 Daiwa House Ind Co Ltd Structure for suppressing propagation of solid borne sound through floor
JP2009191584A (en) * 2008-02-18 2009-08-27 Takenaka Komuten Co Ltd Floor slab structure and building having floor slab structure
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JP2014015530A (en) * 2012-07-09 2014-01-30 Hitachi Kasei Polymer Co Ltd A sealing material for buildings

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