JP4692989B2 - Method of suppressing divergence of VOC at construction site - Google Patents

Method of suppressing divergence of VOC at construction site Download PDF

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JP4692989B2
JP4692989B2 JP2005138049A JP2005138049A JP4692989B2 JP 4692989 B2 JP4692989 B2 JP 4692989B2 JP 2005138049 A JP2005138049 A JP 2005138049A JP 2005138049 A JP2005138049 A JP 2005138049A JP 4692989 B2 JP4692989 B2 JP 4692989B2
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voc
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construction site
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JP2006316440A (en
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登 野々山
勝行 高山
智美 添田
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Fujita Corp
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Description

本発明は、建築工事中に発生するVOC(揮発性有機化合物 Volatile Organic Compounds)への対策を施した建設現場におけるVOCの発散抑制方法に関する。 The present invention relates to a VOC method divergence inhibition in VOC (volatile organic compounds Volatile Organic Compounds,) take measures to the construction site which occurs during architectural construction.

従来より、例えば事務所ビルやマンションなどの新築工事、および外壁等の改修工事などの建設現場において、多くの有害なVOC(アセトアルデヒド、トルエン、トリクロロエチレン、テトラクロロエチレン、ホルムアルデヒド、ベンゼン、キシレンなどの様々な揮発性有機化合物)を含有する塗料、接着剤、防水材などの建材が使用されており、このような建材からVOCが周辺環境に発散するという問題が生じている。特に室内環境の高気密化により、建材から発生するVOC汚染は、シックハウス症候群などの居住者の健康に障害を及ぼすことにより、社会問題として捉えられている。   Conventionally, many harmful VOCs (acetaldehyde, toluene, trichloroethylene, tetrachloroethylene, formaldehyde, benzene, xylene, etc.) are volatilized in construction sites such as new constructions such as office buildings and condominiums, and renovations of outer walls. Building materials such as paints, adhesives, waterproofing materials, and the like containing a conductive organic compound) are used, and there is a problem that VOCs diverge from the building materials into the surrounding environment. In particular, VOC pollution generated from building materials due to high air-tightness of the indoor environment has been regarded as a social problem by affecting the health of residents such as sick house syndrome.

しかし、上述のようなVOCの防止策として、低含有VOC建材を使用することが望ましいが、施工性および建材強度等の物性確保などにより、VOCを含有する溶剤系薬剤の使用が必要となっている。また、一般に塗料、接着剤などから揮発して拡散したVOCは処理する対策がないのが現実である。
一方、新築工事、および外壁等の改修工事などの建設現場では、建物躯体または建物の周囲を建設工事用シートで覆い、工事で発生する塵埃の周囲への拡散を抑制するようにしている(例えば、特許文献1、特許文献2)。
特開2000−303699 特開2004−162497
However, as a measure for preventing VOC as described above, it is desirable to use a low-content VOC building material, but it is necessary to use a solvent-based chemical containing VOC for securing physical properties such as workability and building material strength. Yes. Further, in general, there is no measure for treating VOCs that are volatilized and diffused from paints, adhesives, and the like.
On the other hand, at construction sites such as new construction work and renovation work such as outer walls, the surroundings of the building frame or building are covered with a construction work sheet to suppress the diffusion of dust generated in the work to the surroundings (for example, Patent Document 1, Patent Document 2).
JP 2000-303699 A JP-A-2004-162497

本発明は、従来から使用されている建設工事用シートに着目して案出されたものであって、本発明は、建築工事中に発生するVOCの影響を軽減できる建設現場におけるVOCの発散抑制方法を提供することを目的とする。 The present invention, which has been devised in view of the construction work for the seat that has been conventionally used, the present invention is, of VOC in the construction site Ru can reduce the effects of VOC that occur during building construction An object is to provide a method for suppressing divergence.

上述の目的を達成するため、本発明の建設現場におけるVOCの発散抑制方法は、紫外線の通過を可能とした透明ポリマーからなるフィルム状のシート本体と、前記シート本体の一方の面のみにコーティングされた光触媒を含むVOC処理機能膜とを有する建設工事用シートを設け、建設現場において建物躯体または建物の周囲を、前記一方の面を前記建物躯体または建物に向けて前記建設工事用シートで覆い、建設現場で発生するVOCを前記VOC処理機能膜で処理し、VOCの周辺環境への発散を抑制するようにしたことを特徴とする。 Order to achieve the above object, VOC method divergence suppression in the construction site of the present invention, a film-like sheet body made possible with the transparent polymer passage of ultraviolet light, the coating on only one side of the seat body A construction work sheet having a VOC processing functional film containing a photocatalyst formed is provided, and the building housing or the periphery of the building is covered with the construction work sheet at the construction site with the one surface facing the building housing or the building. The VOC generated at the construction site is processed by the VOC processing function film to suppress the divergence of the VOC to the surrounding environment.

建設現場では、従来から、建物躯体または建物の周囲が建設工事用シートで覆われ、新築工事や改修工事などの工事が行なわれる。
そこで、この建設工事用シートに本発明の建設工事用シートを用いれば、建物躯体または建物に向けられたシート本体の一方の面に光触媒を含むVOC処理機能膜をコーティングしたことから、建築工事中に発生する揮発性有機化合物(VOC)をVOC処理機能膜に含まれる光触媒で処理することができる。
すなわち、建物躯体や建物の周囲を、VOC処理専用シートで覆うなどの特別の工程を何ら要せず、従来と同じ建設工程により簡単にVOCの処理を行なえ、VOCの悪影響を軽減できる。



Conventionally, at the construction site, the building frame or the periphery of the building is covered with a construction work sheet, and construction work such as new construction work or repair work is performed.
Therefore, when the construction sheet of the present invention is used for this construction sheet, the VOC treatment functional film containing the photocatalyst is coated on one surface of the building body or the sheet main body facing the building. The volatile organic compound (VOC) generated in the catalyst can be treated with a photocatalyst contained in the VOC treatment functional film.
That is, no special process such as covering the building frame or the surrounding area with a VOC processing sheet is required, and VOC processing can be easily performed by the same construction process as before, thereby reducing the adverse effects of VOC.



本発明の実施の形態では、建築工事において使用する塗料等、及び工事により発生する埃、水の飛散防止、工事時の美観確保などの目的で使用される建設工事用シートに光触媒(例えば二酸化チタン微粒子)を含有したVOC処理機能膜を設けることにより、塗料、接着剤などから発生する有害なVOCを処理するものである。
具体的には、フィルム状のシート本体や、あるいはメッシュ状のシート本体を設け、これに光触媒を含有したVOC処理機能膜をコーティングする。
この場合、光およびVOCが通過するメッシュ状のシート本体を設けることにより、シート本体の両面でVOCの処理が可能となる。
また、この建設工事用シートが光触媒の活性に必要となる太陽光(紫外線)を通過する透明ポリマー(テトラフルオールエチレン等)に光触媒を固着した構成とすると、建物や建物躯体に臨む建設工事用シートの内面においてVOCの処理が可能となる。
また、VOC処理機能膜は、アパタイト、珪藻土、シェラック樹脂などのVOC吸着作用を有する化合物と光触媒とを混合した混合物を、シート本体に固着することで構成するようにしてもよい。
In the embodiment of the present invention, a photocatalyst (for example, titanium dioxide) is used for a construction sheet used for the purpose of, for example, paint used in construction work, dust generated by the construction work, prevention of water scattering, and ensuring aesthetics during construction work. By providing a VOC processing functional film containing fine particles, harmful VOCs generated from paints, adhesives and the like are processed.
Specifically, a film-like sheet body or a mesh-like sheet body is provided, and this is coated with a VOC processing functional film containing a photocatalyst.
In this case, by providing a mesh-like sheet body through which light and VOC pass, VOC processing can be performed on both sides of the sheet body.
In addition, if this construction sheet is constructed by fixing the photocatalyst to a transparent polymer (tetrafluoroethylene, etc.) that passes sunlight (ultraviolet rays) necessary for the activation of the photocatalyst, it will be used for construction work that faces buildings and building structures. VOC processing can be performed on the inner surface of the sheet.
Moreover, you may make it comprise a VOC processing functional film | membrane by adhering to the sheet | seat main body the mixture which mixed the compound which has VOC adsorption | suction effects, such as apatite, diatomaceous earth, and shellac resin, and a photocatalyst.

以下、本発明の具体的実施例を説明する。
図1は本発明の第1の実施例による建設工事用シート2を示す部分断面図である。
本実施例の建設工事用シート2は、例えば非透明、非通気性のシート本体10の両面に光触媒を含有したVOC処理機能膜20を設けたものである。
光触媒として、例えば、二酸化チタン微粒子や酸化亜鉛などの金属化合物が用いられ、本実施例では二酸化チタン微粒子を用いている。
シート本体10には、建築工事用養生シートやブルーシートと呼ばれる従来の市販品である建設工事用シート2が用いられる。
この種のシートは、一般に塩化ビニルやポリプロピレンなどのポリマーを主成分として、縦数m(例えば1.8〜5m程度)×横数m(例えば1.8〜5m程度)のサイズで、厚さ0.1〜1mm程度の方形シート状のものが利用されており、これをシート本体として用いている。
建設工事用シート2の市販品としては、例えば明治商工株式会社製の商品名「防炎シート(建築工事用養生シート)」や荻原工業株式会社製の商品名「ブルーシート」を用いることができる。なお、「防炎シート(建築工事用養生シート)」は厚みが0.3mmであり、「ブルーシート」は厚みが0.26mmである。
Hereinafter, specific examples of the present invention will be described.
FIG. 1 is a partial sectional view showing a construction work sheet 2 according to a first embodiment of the present invention.
In the construction work sheet 2 of this embodiment, for example, a VOC processing functional film 20 containing a photocatalyst is provided on both surfaces of a non-transparent, non-breathable sheet body 10.
As the photocatalyst, for example, metal compounds such as titanium dioxide fine particles and zinc oxide are used, and titanium dioxide fine particles are used in this embodiment.
The sheet body 10 is a construction sheet 2 which is a conventional commercial product called a building curing sheet or a blue sheet.
This type of sheet is generally composed of a polymer such as vinyl chloride or polypropylene as the main component and has a length of m (for example, about 1.8 to 5 m) x a width of m (for example, about 1.8 to 5 m) and a thickness. A rectangular sheet of about 0.1 to 1 mm is used, and this is used as a sheet body.
As a commercial product of the construction work sheet 2, for example, a trade name “flameproof sheet (curing sheet for building work)” manufactured by Meiji Shoko Co., Ltd. or a trade name “Blue Sheet” manufactured by Ebara Industries Co., Ltd. can be used. . Note that the “flameproof sheet (curing sheet for building construction)” has a thickness of 0.3 mm, and the “blue sheet” has a thickness of 0.26 mm.

また、VOC処理機能膜20は、光触媒をコーティング材に含有させ、このコーティング材をシート本体10の表面に塗布したり、あるいは、吹き付けることでコーティングしたものである。
ここで、コーティング材としては、(1)光触媒粒子と無機系シリカバインダー(シリカ)を含むアルコール系など溶剤および水溶液、(2)無機化合物(例えば、アパタイト)または有機化合物(例えば、シェラック樹脂)によるVOC吸着作用を有する化合物と光触媒(二酸化チタン)の混合物を含有するアルコール系など溶剤および水溶液などを使用する。
また、光触媒は可視光領域に近い紫外線(波長390nm程度)により活性を示すので、VOC処理機能膜20の構成材料に紫外線を通過する材料(例えばテトラフルオールエチレン)を用いることで、建物や建物躯体に臨む建設工事用シート2の内面においてまたは内面および外面の両面においてVOCの処理が可能となる。
なお、本実施例ではシート本体10の両面にVOC処理機能膜20を設けたが、VOC処理機能膜20を片面だけに設けたものであってもよい。また、シート本体10も非透明、非通気性のものに限定されず、必要に応じて適宜変更が可能なものとする。
Further, the VOC processing functional film 20 is a film in which a photocatalyst is contained in a coating material, and this coating material is coated on the surface of the sheet body 10 or sprayed.
Here, as the coating material, (1) alcohol-based solvent and aqueous solution containing photocatalyst particles and inorganic silica binder (silica), (2) inorganic compound (for example, apatite) or organic compound (for example, shellac resin) A solvent and an aqueous solution such as an alcohol containing a mixture of a compound having a VOC adsorption action and a photocatalyst (titanium dioxide) are used.
In addition, since the photocatalyst is activated by ultraviolet rays (wavelength of about 390 nm) close to the visible light region, a material that passes ultraviolet rays (for example, tetrafluoroethylene) is used as a constituent material of the VOC processing functional film 20, thereby building or building VOC processing can be performed on the inner surface of the construction work sheet 2 facing the housing or on both the inner surface and the outer surface.
In this embodiment, the VOC processing function film 20 is provided on both surfaces of the sheet body 10, but the VOC processing function film 20 may be provided only on one side. Further, the sheet body 10 is not limited to a non-transparent and non-breathable one, and can be appropriately changed as necessary.

図2は本発明の第2の実施例による建設工事用シート2を示す部分断面図である。
本実施例の建設工事用シート2は、繊維材により製造された網目状のシート本体30の繊維に光触媒(例えば二酸化チタン微粒子)を含有したVOC処理機能膜40を固着したものである。
シート本体30は、ポリマ等よりなる繊維材を用いたものであり、市販品としては、例えば明治商工株式会社製の商品名「ソフトメッシュa」を用いることができる。
なお、「ソフトメッシュa」は、目会いが1mmであり、材質はポリプロピレンである。
VOC処理機能膜40は、アパタイト、珪藻土、シェラック樹脂などのVOC吸着作用を有する化合物と光触媒とを混合した混合物を、各種溶剤(例えば、水溶液)を用いてシート本体30に固着するようにする。
第2の実施例では、光およびVOCが通過するメッシュ状のシート本体30を用い、シート本体30をその厚さ方向に貫通する多数の隙間Sを有するので、シート本体30の両面でVOCの処理が可能となる。
なお、本実施例においても、シート本体30の構成材料に紫外線を通過する材料(例えばテトラフルオールエチレン)を用いることで、建物や建物躯体に臨む建設工事用シート2の内面においてVOCの処理が可能となる。
FIG. 2 is a partial sectional view showing a construction work sheet 2 according to a second embodiment of the present invention.
The construction work sheet 2 of this embodiment is obtained by fixing a VOC treatment functional film 40 containing a photocatalyst (for example, titanium dioxide fine particles) to the fibers of a mesh-like sheet main body 30 made of a fiber material.
The sheet body 30 uses a fiber material made of a polymer or the like, and as a commercial product, for example, a trade name “Soft Mesh a” manufactured by Meiji Shoko Co., Ltd. can be used.
The “soft mesh a” has a 1 mm mesh size and is made of polypropylene.
The VOC treatment functional film 40 is made to adhere to the sheet body 30 with a mixture of a compound having a VOC adsorption action such as apatite, diatomaceous earth, shellac resin and a photocatalyst using various solvents (for example, an aqueous solution).
In the second embodiment, a mesh-like sheet body 30 through which light and VOC pass is used, and since there are a large number of gaps S penetrating the sheet body 30 in the thickness direction, VOC processing is performed on both surfaces of the sheet body 30. Is possible.
Also in the present embodiment, by using a material that passes ultraviolet rays (for example, tetrafluoroethylene) as a constituent material of the sheet body 30, VOC treatment can be performed on the inner surface of the construction work sheet 2 facing the building or the building frame. It becomes possible.

次に第1、第2の実施例の変形例について説明する。
図3は第1の実施例の変形例による建設工事用シート2を示す部分断面図、図4は第2の実施例の変形例による建設工事用シート2を示す部分断面図である。
図3、図4に示す変形例では、シート本体10(30)とVOC処理機能膜20(40)との間に、シート本体10(30)の保護およびVOC処理機能膜20(40)のシート本体10(30)への接着性を高めるアンダーコート層50を設けたものである。
このようなアンダーコート層50として、例えば、エタノールなどの溶剤にポリシリカを含むあるいはシリカ変性アクリル樹脂を含むものなどが挙げられる。
Next, modifications of the first and second embodiments will be described.
3 is a partial sectional view showing a construction work sheet 2 according to a modification of the first embodiment, and FIG. 4 is a partial sectional view showing a construction work sheet 2 according to a modification of the second embodiment.
3 and 4, the sheet body 10 (30) is protected between the sheet body 10 (30) and the VOC processing function film 20 (40), and the sheet of the VOC processing function film 20 (40) is provided. The undercoat layer 50 which improves the adhesiveness to the main body 10 (30) is provided.
Examples of such an undercoat layer 50 include those containing polysilica or a silica-modified acrylic resin in a solvent such as ethanol.

次に以上のような第1、第2の実施例に基づいて実際に作成した建設工事用シート2のVOC処理効果の確認試験について説明する。
(1)密封容器内でのVOC(アセトアルデヒド)処理試験
ここでは、紫外線を透過する透明なフッ素樹脂フィルムにより作成された袋に本実施例に係る光触媒コーティングおよび未コーティング試験体(建築工事用養生シート)を入れて、VOCを含む空気を充填し、UVランプにより紫外線を照射してVOCの濃度を測定することにより、光触媒をコーティングした建設工事用シート2のVOC処理能力を測定した。
Next, a test for confirming the VOC treatment effect of the construction work sheet 2 actually created based on the first and second embodiments will be described.
(1) VOC (acetaldehyde) treatment test in a sealed container Here, a photocatalyst-coated and uncoated test specimen (curing sheet for building construction) according to this example is applied to a bag made of a transparent fluororesin film that transmits ultraviolet rays. ), Filled with air containing VOC, and irradiated with ultraviolet rays from a UV lamp to measure the concentration of VOC, thereby measuring the VOC processing capacity of the construction sheet 2 coated with the photocatalyst.

試験体としては光触媒コーティング材を市販の建築工事用養生シートに塗布したものを使用した。
また、光触媒コーティング材としては安定なシェラック樹脂などを含有するバインダに光触媒粒子(粒子径200nm以下の二酸化チタン)を数%含有する水溶液を使用した。
また、コーティング方法は光触媒コーティング材を建築工事用養生シートに噴霧する方法を用いた。なお、光触媒コーティング材のコーティング量は100g/m とする。
また、試験条件としては、試験体サイズを10cm×10cm、VOC含有空気の容器を2リットル、紫外線強度(中心波長310〜400nm)を0.5mW/cm とした。
図5は試験結果の例を示す表である。
図示のように、本実施例を適用した光触媒コーティングシート及び光触媒コーティングメッシュシートによってアセトアルデヒド濃度が低下し、適正に処理されていることが分かる。
As the test body, a photocatalyst coating material applied to a commercially available curing sheet for building construction was used.
As the photocatalyst coating material, an aqueous solution containing several percent of photocatalyst particles (titanium dioxide having a particle diameter of 200 nm or less) in a binder containing a stable shellac resin or the like was used.
Moreover, the coating method used the method of spraying the photocatalyst coating material on the curing sheet for building construction. The coating amount of the photocatalyst coating material is 100 g / m 2 .
As test conditions, the specimen size was 10 cm × 10 cm, the VOC-containing air container was 2 liters, and the ultraviolet intensity (center wavelength: 310 to 400 nm) was 0.5 mW / cm 2 .
FIG. 5 is a table showing examples of test results.
As shown in the figure, it can be seen that the acetaldehyde concentration is lowered by the photocatalyst coating sheet and the photocatalyst coating mesh sheet to which the present embodiment is applied, and is appropriately processed.

(2)建築工事用養生シート(建設工事用シート2)によるVOC(トルエン)処理模擬試験
ここでは、模擬的に建築工事用養生シートにより空間を囲み(幅、奥行き、高さ各1m)中にトルエンを充満させて建築工事用養生シートの内部および外部のトルエン濃度を測定する。測定位置は、シートの内側では囲み空間の中心部とし、シートの外側ではシート面から外側に20cm、高さ50cmの位置とする。測定サイクルは10分毎に5回測定の平均値とする。
図6は試験結果の例を示す表である。
図示のように、本実施例を適用した光触媒コーティングシート及び光触媒コーティングメッシュシートによってシートの内側と外側の両方でトルエン濃度が低下し、適正に処理されていることが分かる。
(2) VOC (toluene) treatment simulation test using a curing sheet for building construction (construction sheet 2) Here, a space is simulated by a curing sheet for building work (width, depth, height each 1m) Fill toluene and measure the concentration of toluene inside and outside the building curing sheet. The measurement position is the center of the enclosed space inside the sheet, and the position outside the sheet is 20 cm outward from the sheet surface and the height is 50 cm. The measurement cycle is the average of 5 measurements every 10 minutes.
FIG. 6 is a table showing examples of test results.
As shown in the figure, it can be seen that the photocatalyst coating sheet and the photocatalyst coating mesh sheet to which the present embodiment is applied are reduced in the toluene concentration on both the inside and the outside of the sheet and properly treated.

本発明の第1の実施例による建設工事用シート2を示す部分断面図である。It is a fragmentary sectional view which shows the sheet | seat 2 for construction work by the 1st Example of this invention. 本発明の第2の実施例による建設工事用シート2を示す部分断面図である。It is a fragmentary sectional view which shows the sheet | seat 2 for construction work by the 2nd Example of this invention. 第1の実施例の変形例による建設工事用シート2を示す部分断面図である。It is a fragmentary sectional view which shows the sheet | seat 2 for construction work by the modification of a 1st Example. 第2の実施例の変形例による建設工事用シート2を示す部分断面図である。It is a fragmentary sectional view which shows the sheet | seat 2 for construction work by the modification of a 2nd Example. 本発明の実施例による建設工事用シート2の試験結果の例を示す表である。It is a table | surface which shows the example of the test result of the sheet | seat 2 for construction works by the Example of this invention. 本発明の実施例による建設工事用シート2の試験結果の例を示す表である。It is a table | surface which shows the example of the test result of the sheet | seat 2 for construction works by the Example of this invention.

符号の説明Explanation of symbols

2……建設工事用シート、10、30……シート本体、20、40……VOC処理機能膜、50……アンダーコート層。   2 ... construction sheet 10, 30 ... sheet body, 20, 40 ... VOC treatment functional film, 50 ... undercoat layer.

Claims (4)

紫外線の通過を可能とした透明ポリマーからなるフィルム状のシート本体と、前記シート本体の一方の面のみにコーティングされた光触媒を含むVOC処理機能膜とを有する建設工事用シートを設け、
建設現場において建物躯体または建物の周囲を、前記一方の面を前記建物躯体または建物に向けて前記建設工事用シートで覆い、
建設現場で発生するVOCを前記VOC処理機能膜で処理し、VOCの周辺環境への発散を抑制するようにした、
ことを特徴とする建設現場におけるVOCの発散抑制方法。
A sheet for construction work having a film-like sheet main body made of a transparent polymer capable of passing ultraviolet rays and a VOC treatment functional film containing a photocatalyst coated only on one surface of the sheet main body is provided.
Covering the surroundings of the building frame or building at the construction site with the construction sheet with the one side facing the building frame or building ,
The VOC generated at the construction site was processed with the VOC processing functional film, and the VOC was prevented from spreading to the surrounding environment.
A method for suppressing VOC divergence at a construction site.
前記光触媒は二酸化チタン微粒子であることを特徴とする請求項1記載の建設現場におけるVOCの発散抑制方法。 2. The method for suppressing VOC divergence at a construction site according to claim 1, wherein the photocatalyst is titanium dioxide fine particles . 前記VOC処理機能膜は、VOC吸着作用を有する化合物と前記光触媒とが混合された混合物が前記シート本体に固着されて構成されていることを特徴とする請求項1または2記載の建設現場におけるVOCの発散抑制方法。 3. The VOC in a construction site according to claim 1, wherein the VOC treatment functional film is configured by adhering a mixture of a compound having a VOC adsorption action and the photocatalyst to the sheet body. How to suppress the divergence. 前記VOC吸着作用を有する化合物は、アパタイトまたは珪藻土またはシェラック樹脂であることを特徴とする請求項記載の建設現場におけるVOCの発散抑制方法。 4. The method for suppressing VOC divergence at a construction site according to claim 3, wherein the compound having VOC adsorption action is apatite, diatomaceous earth, or shellac resin .
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