JP2006283445A - Construction method of hard polyurethane-foam heat insulating layer - Google Patents

Construction method of hard polyurethane-foam heat insulating layer Download PDF

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JP2006283445A
JP2006283445A JP2005106233A JP2005106233A JP2006283445A JP 2006283445 A JP2006283445 A JP 2006283445A JP 2005106233 A JP2005106233 A JP 2005106233A JP 2005106233 A JP2005106233 A JP 2005106233A JP 2006283445 A JP2006283445 A JP 2006283445A
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heat insulating
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release sheet
insulating layer
foaming
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Hiroichi Tsukaguchi
博一 塚口
Akihiro Fujio
明弘 藤尾
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Toyo Tire Corp
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Toyo Tire and Rubber Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction method of a hard polyurethane-foam heat insulating layer by a spacerless construction method, with an improved property of adhesion with an adjacent heat insulating layer of a unit width. <P>SOLUTION: This construction method of the hard polyurethane-foam heat insulating layer is formed by constructing and joining a plurality of unit heat insulating layers in the width direction, and the unit heat insulating layers are constructed by repeating a unit foaming process, and the unit forming process comprises a surface material 11 supply process, a separation sheet 3 supply process, a foaming process of forming hard polyurethane foam 7 by supplying and foaming a foaming undiluted solution composition 30 from a mixing head 20 to a molding space formed of a base body wall surface, a surface material 11 and a separation sheet 3 and a separation sheet separating process of separating and removing the separation sheet 3 from below hard polyurethane foam after foaming and hardening, and the separation sheet 3 contacts with the base body wall surface having separation force of 150 to 600 mN/50 mm. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、冷凍倉庫、冷蔵倉庫などの低温倉庫、液化窒素、液化ヘリウム、ＬＮＧなどの超低温液化ガス貯蔵タンクなどの大型の建造物や構築物に対する硬質ポリウレタンフォーム断熱層の施工方法に関するものである。   The present invention relates to a construction method of a hard polyurethane foam heat insulation layer for a large-scale building or structure such as a cryogenic warehouse such as a refrigerated warehouse or a refrigerated warehouse, an ultra-low temperature liquefied gas storage tank such as liquefied nitrogen, liquefied helium, or LNG.

冷凍倉庫、液化窒素や液化ヘリウムなどの貯蔵タンクなどの大型の建造物や構築物を断熱すべき基体（被断熱物）とし、その基体壁面に断熱材として硬質ポリウレタンフォームを現場施工する断熱工法においては、通常、被断熱物の外表面は高さが高く幅も広いものであるために全面に一度に硬質ポリウレタンフォームを形成する発泡原液組成物を供給して発泡硬化させて硬質ポリウレタンフォーム断熱層を形成することは困難である。このような被断熱物の壁面の断熱材の施工方法としては、施工すべき断熱層を幅方向に分割し、分割した単位幅の断熱層（単位断熱層）を幅方向に繰り返し施工して基体壁面の全体を硬質ポリウレタンフォームにて被覆する技術が公知である（例えば、特許文献１）。   In the heat insulation method of constructing hard polyurethane foam as a heat insulating material on the ground for large buildings and structures such as refrigerated warehouses, storage tanks such as liquefied nitrogen and liquefied helium, etc. Usually, since the outer surface of the object to be insulated is high in height and width, a foamed stock solution composition that forms a rigid polyurethane foam at once is supplied to the entire surface and foam-cured to form a rigid polyurethane foam insulation layer. It is difficult to form. As a method of constructing the heat insulating material on the wall surface of such an object to be insulated, the heat insulating layer to be constructed is divided in the width direction, and the divided unit width heat insulating layer (unit heat insulating layer) is repeatedly applied in the width direction to form a base. A technique for covering the entire wall surface with a rigid polyurethane foam is known (for example, Patent Document 1).

特許文献１においては、壁面の幅方向端面をプライマー処理した、施工断熱材と同じ厚さのスペーサーを基体壁面に貼着し、該スペーサーを介して断熱材表面位置にガラスクロスなどの補強性を有する表面材を供給すると共に該表面材を支持する押え板を配置し、基体壁面、２つのスペーサーの端面及び押え板にて空間を形成し、この空間に上方から硬質ポリウレタンフォームを形成する発泡原液組成物をミキシングヘッドより注入して、発泡原液組成物を発泡硬化させて硬質ポリウレタンフォームを形成させながら押え板を上昇させて単位幅の断熱層を形成し、係る単位幅の断熱層を幅方向に繰り返し施工して所定の硬質ポリウレタンフォーム断熱層を形成する技術が開示されている。
特開２００１−１７３８９４号公報 In Patent Document 1, a spacer having the same thickness as the construction heat insulating material, which is primer-treated on the end surface in the width direction of the wall surface, is attached to the base wall surface, and a reinforcing property such as a glass cloth is provided on the surface of the heat insulating material through the spacer. A foaming undiluted solution that supplies a surface material having a presser plate that supports the surface material, forms a space by a base wall, two spacer end faces and a presser plate, and forms a rigid polyurethane foam in the space from above. The composition is injected from the mixing head, the foamed stock solution composition is foamed and cured to form a rigid polyurethane foam, and the presser plate is raised to form a unit width heat insulation layer, and the unit width heat insulation layer is formed in the width direction. A technique for forming a predetermined hard polyurethane foam heat insulating layer by repeatedly applying to the above is disclosed.
JP 2001-173894 A

しかし、特許文献１開示の技術によれば、スペーサーにプライマー処理したり、プライマー処理したスペーサーを基体表面に配置して施工区間を形成したりする工程は、多数のスペーサーを作成して用意する必要があるだけでなく、実際の作業現場へスペーサーを搬入して保管するスペースの確保が必要であり、実作業においてはスペーサーの設置工程も必要であって、施工時間の短縮には限界があり、コスト低減の観点より改善が求められている。   However, according to the technique disclosed in Patent Document 1, it is necessary to prepare and prepare a large number of spacers in the process of primer-treating spacers or arranging the primer-treated spacers on the surface of a substrate to form a construction section. In addition, there is a need to secure a space for carrying and storing spacers at the actual work site. In actual work, a spacer installation process is also required, and there is a limit to shortening the construction time. Improvement is required from the viewpoint of cost reduction.

これに対してスペーサーを使用しないスペーサーレス工法が考えられる。スペーサーレス工法は、スペーサーの代わりに離型紙等の離型シートを用いて幅方向端面に硬質ポリウレタンフォームのスキン層を形成する方法であり、単位幅の断熱層の施工後、ないしは単位幅の断熱層の施工中に発泡硬化の終了した下部より該離型シートを剥離除去し、先に施工した単位幅の断熱層のスキン層形成端面、新たに供給する離型シート、及び基体壁面と表面材とで発泡空間を形成して隣接する単位幅の断熱層の施工を行うものである。   On the other hand, a spacerless construction method that does not use a spacer can be considered. The spacerless method is a method of forming a hard polyurethane foam skin layer on the end surface in the width direction using a release sheet such as release paper instead of a spacer. After the construction of the heat insulating layer of unit width or heat insulation of unit width During the construction of the layer, the release sheet is peeled and removed from the lower part where the foam curing has been completed, and the skin layer forming end face of the heat insulating layer having the unit width previously applied, the release sheet to be newly supplied, and the substrate wall surface and the surface material A foaming space is formed with and a heat insulating layer having a unit width adjacent thereto is constructed.

係る離型シートを使用したスペーサーレス工法において、施工後に剥離性のよい離型シートを使用した場合、隣接する単位幅の断熱層との接着性が十分ではなく、継ぎ目の強度が不足することが判明した。   In the spacerless method using such a release sheet, when a release sheet with good peelability is used after construction, the adhesiveness with the heat insulating layer of the adjacent unit width is not sufficient, and the strength of the seam may be insufficient. found.

本発明は、隣接する単位幅の断熱層との接着性が改善されたスペーサーレス工法による硬質ポリウレタンフォーム断熱層の施工方法を提供することを目的とする。   An object of this invention is to provide the construction method of the hard polyurethane foam heat insulation layer by the spacerless construction method by which the adhesiveness with the heat insulation layer of an adjacent unit width was improved.

本発明は、基体壁面に接した硬質ポリウレタンフォーム断熱層の施工方法であって、
ミキシングヘッド、表面成形部材、表面材供給装置、側部端面成形部材、及び離型シート供給装置を備えた発泡装置を使用するものであり、
前記硬質ポリウレタンフォーム断熱層は幅方向に複数の単位断熱層が施工・接合されたものであり、
前記単位断熱層は前記発泡装置を幅方向に移動させて単位発泡工程を繰り返して施工するものであり、
前記単位発泡工程は、前記表面成形部材に沿って表面材を前記表面材供給装置から供給する表面材供給工程、前記側部端面成形部材に沿って離型シートを前記離型シート供給装置から供給する離型シート供給工程、基体壁面、表面成形部材に沿って供給された前記表面材及び側部端面成形部材に沿って供給された前記離型シートにて形成された成形空間に前記ミキシングヘッドから発泡原液組成物を供給して発泡させて硬質ポリウレタンフォームとする発泡工程、及び発泡硬化後の硬質ポリウレタンフォームから前記離型シートを剥離除去して単位断熱層とする離型シート剥離工程を有し、
前記離型シートは、剥離力が１５０〜６００ｍＮ／５０ｍｍであることを特徴とする。 The present invention is a construction method of a hard polyurethane foam heat insulating layer in contact with the substrate wall surface,
A mixing head, a surface molding member, a surface material supply device, a side end surface molding member, and a foaming device including a release sheet supply device are used.
The hard polyurethane foam heat insulating layer is constructed by joining and joining a plurality of unit heat insulating layers in the width direction,
The unit heat insulating layer is constructed by repeating the unit foaming process by moving the foaming device in the width direction,
The unit foaming step includes a surface material supply step of supplying a surface material from the surface material supply device along the surface molding member, and a release sheet is supplied from the release sheet supply device along the side end surface molding member. From the mixing head to the molding space formed by the release sheet supplying step, the substrate wall surface, the surface material supplied along the surface molding member, and the release sheet supplied along the side edge molding member A foaming step of supplying a foamed stock solution composition to foam and forming a rigid polyurethane foam, and a release sheet peeling step of peeling and removing the release sheet from the hard polyurethane foam after foam curing to form a unit heat insulating layer ,
The release sheet has a peeling force of 150 to 600 mN / 50 mm.

係る構成の硬質ポリウレタンフォーム断熱層の施工方法は、先に施工した単位幅の断熱層（単位断熱層）と隣接する単位断熱層との層間接着性が改善されたスペーサーレス工法である。   The construction method of the hard polyurethane foam heat insulation layer of the structure which concerns is a spacerless construction method with which the interlayer adhesiveness of the unit heat insulation layer (unit heat insulation layer) constructed previously and the adjacent unit heat insulation layer was improved.

離型シートの剥離力が１５０ｍＮ／５０ｍｍ未満の場合には、離型シートに施された離型処理剤が単位断熱層の端面に移行すると推測される理由により、先行して施工した単位断熱層の端面のスキン層を形成空間の一部として施工した隣接する単位断熱層との層間接着強度が低下し、被断熱物と外界との温度差により断熱層に発生する応力によって亀裂を生じる可能性があり、６００ｍＮ／５０ｍｍを超える場合には単位断熱層の硬質ポリウレタンフォーム硬化後の剥離シートの剥離の作業性が低下し、剥離シートが破損する場合がある。   When the release force of the release sheet is less than 150 mN / 50 mm, the unit heat insulating layer applied in advance is presumed because the release treatment agent applied to the release sheet is assumed to move to the end face of the unit heat insulating layer. Interlayer adhesion strength between adjacent unit heat insulation layers constructed with the skin layer of the end face of the metal as a part of the formation space decreases, and cracks may occur due to stress generated in the heat insulation layer due to temperature difference between the object to be insulated and the outside In the case of exceeding 600 mN / 50 mm, the workability of peeling of the release sheet after the hard polyurethane foam of the unit heat insulating layer is cured may be reduced, and the release sheet may be damaged.

離型シート剥離工程は、単位発泡工程が終了して単位断熱層が形成された後に行ってもよく、単位発泡工程の実行中に供給した発泡原液組成物が発泡硬化した部分から行ってもよいが、ミキシングヘッド、表面材を支持する表面成形部材、離型シートを支持する側部端面成形部材の上昇の際に離型シートを剥離除去することが、単位発泡工程終了後すぐに隣接位置での単位発泡工程を開始できるので好ましい。   The release sheet peeling step may be performed after the unit foaming step is completed and the unit heat insulating layer is formed, or may be performed from the portion where the foaming stock solution composition supplied during the unit foaming step is foam-cured. However, when the mixing head, the surface molding member that supports the surface material, and the side end surface molding member that supports the release sheet are lifted, the release sheet can be peeled and removed immediately after the unit foaming process is completed. This is preferable because the unit foaming step can be started.

上記の硬質ポリウレタンフォーム断熱層の施工方法においては、前記単位発泡工程は前記表面成形部材と前記側部端面成形部材とを、それぞれ前記表面材と前記離型シートとを供給させつつ底部から上方へ移動させると共に前記ミキシングヘッドも底部から上方に移動させつつ単位断熱層を施工するものであることが好ましい。   In the construction method for the hard polyurethane foam heat insulating layer, the unit foaming step is performed from the bottom to the top while supplying the surface molding member and the side end surface molding member to the surface material and the release sheet, respectively. It is preferable that the unit heat insulating layer is applied while moving the mixing head upward from the bottom.

係る構成の施工方法により、高さの高い基体の壁面に容易に硬質ポリウレタンフォーム断熱層を施工することができる。   By the construction method having such a configuration, the hard polyurethane foam heat insulating layer can be easily constructed on the wall surface of the substrate having a high height.

本発明において使用する離型シートとしては、表面に離型処理が施されたクラフト紙、樹脂フィルム等、即ち離型紙や離型フィルムなどが使用可能である。離型シートの剥離力は市販の粘着テープを貼着した後の剥離力として評価する。離型シートの剥離力は離型処理剤の組成を変更、調整することによって調整可能であるが、市販の離型シートから選択して使用してもよい。   As the release sheet used in the present invention, kraft paper, resin film, and the like whose surface has been subjected to release treatment, that is, release paper, release film, and the like can be used. The peel strength of the release sheet is evaluated as the peel strength after sticking a commercially available adhesive tape. The release force of the release sheet can be adjusted by changing or adjusting the composition of the release treatment agent, but may be selected from commercially available release sheets.

本発明において硬質ポリウレタンフォーム断熱層の表面（基体壁面の反対面）に積層する表面材は、補強性を有する材料を限定なく使用することができる。具体的にはガラスメッシュ、ガラスペーパー、有機繊維の織布、不織布やネット、クラフト紙やガラスメッシュと樹脂フィルムの積層体などが例示される。   In the present invention, as the surface material laminated on the surface of the rigid polyurethane foam heat insulating layer (opposite surface of the substrate wall surface), a material having reinforcing properties can be used without limitation. Specific examples include glass mesh, glass paper, organic fiber woven fabric, non-woven fabric, net, kraft paper, a laminate of glass mesh and resin film, and the like.

断熱層を構成する硬質ポリウレタンフォームは、公知の硬質ポリウレタンフォーム用のポリオール組成物とポリイソシアネート化合物を使用して形成する。発泡剤としては、ＨＦＣ−２４５ｆａや３６５ｍｆｃ等のＨＦＣ化合物、イソペンタンやシクロペンタンなどのペンタン類、水から選択して少なくとも１種を使用する。   The rigid polyurethane foam constituting the heat insulating layer is formed using a known polyol composition for rigid polyurethane foam and a polyisocyanate compound. As the blowing agent, at least one selected from HFC compounds such as HFC-245fa and 365mfc, pentanes such as isopentane and cyclopentane, and water is used.

図１は、本発明の好適な実施形態に係る硬質ポリウレタンフォーム断熱層の施工方法を例示した斜視図であり、図２は基体壁面に平行方向の縦断側面図、図３は基体壁面に垂直方向の縦断側面図である。施工には、ミキシングヘッド２０、表面材１１を供給する表面材供給装置１３、表面材１１の一部を外面側から支持する表面成形部材としてのパネル５、離型シート３を供給する離型シート供給部材４、離型シート３の一部を支持する側部端面成形部材８とを使用する。これらの部材は、基体壁面に沿って移動可能な基台１（仮想線で一部を図示）に組付けられていることが好ましく、単位発泡工程において単位断熱層の形成に伴って下から上に移動させる少なくともミキシングヘッド２０、表面成形部材としてのパネル５、離型シート３の一部を支持する側部端面成形部材８は、上下に移動可能なリフトに配設することが好ましい。基台１には、ミキシングヘッドにポリオール成分とポリイソシアネート成分を供給するサービスタンクと送液ポンプも設置することが好ましい。   FIG. 1 is a perspective view illustrating a construction method of a rigid polyurethane foam heat insulating layer according to a preferred embodiment of the present invention, FIG. 2 is a longitudinal side view parallel to the substrate wall surface, and FIG. 3 is a direction perpendicular to the substrate wall surface. FIG. For the construction, a mixing head 20, a surface material supply device 13 that supplies the surface material 11, a panel 5 as a surface molding member that supports a part of the surface material 11 from the outer surface side, and a release sheet that supplies the release sheet 3 The supply member 4 and the side end face forming member 8 that supports a part of the release sheet 3 are used. These members are preferably assembled to a base 1 (partially shown by phantom lines) that is movable along the substrate wall surface. From the bottom to the top as the unit heat insulating layer is formed in the unit foaming step. It is preferable that at least the mixing head 20 to be moved, the panel 5 as the surface molding member, and the side end surface molding member 8 that supports a part of the release sheet 3 are arranged on a lift that can move up and down. The base 1 is also preferably provided with a service tank and a liquid feed pump for supplying the polyol component and the polyisocyanate component to the mixing head.

硬質ポリウレタンフォーム断熱層は単位幅に分割して単位発泡工程により形成する。単位発泡工程においては、先に施工した単位幅の断熱層６の端面、基体壁面Ｍ、原反ロール１３から巻き戻して接地面から供給された表面材１１（表面材供給工程）のパネル５に支持された部分及び原反ロール４から巻き戻して接地面から供給された離型シート３（離型シート供給工程）の側部端面成形部材８にて支持された部分により上部が開放された成形空間を形成し、ミキシングヘッド２０より硬質ポリウレタンフォームを形成する発泡原液組成物３０を供給する。発泡原液組成物は供給後短時間で発泡、硬化して硬質ポリウレタンフォームとなる（発泡工程）。被断熱物は通常大きな構築物であるため、パネル５と側部端面成形部材８とは表面材１１と離型シート３を供給しながら上方へ連続的に成形空間を形成するように上昇させ、ミキシングヘッド２０も上昇させる。基体壁面Ｍの上端で単位幅の断熱層の成形が終了し、離型シート３ｆを剥離除去する工程（剥離工程）によって単位発泡工程が終了し、単位断熱層６が完成する。   The rigid polyurethane foam heat insulating layer is divided into unit widths and formed by a unit foaming process. In the unit foaming process, the panel 5 of the surface material 11 (surface material supplying process) fed back from the end surface of the heat insulating layer 6 of the unit width, the substrate wall surface M, and the original fabric roll 13 and supplied from the ground surface is provided. Molding in which the upper part is opened by the supported part and the part supported by the side end face molding member 8 of the release sheet 3 (release sheet supply step) which is rewound from the original roll 4 and supplied from the ground surface. A foaming stock solution composition 30 that forms a space and forms a rigid polyurethane foam from the mixing head 20 is supplied. The foamed stock solution composition is foamed and cured in a short time after supply to form a rigid polyurethane foam (foaming step). Since the object to be insulated is usually a large structure, the panel 5 and the side end face molding member 8 are raised so as to continuously form a molding space upward while supplying the surface material 11 and the release sheet 3, and mixing. The head 20 is also raised. The formation of the heat insulating layer with the unit width is completed at the upper end of the substrate wall surface M, the unit foaming process is completed by the process of removing the release sheet 3f (peeling process), and the unit heat insulating layer 6 is completed.

単位断熱層の幅は、施工する断熱層の大きさや使用する装置などに応じて適宜設定されるものであるが、幅が広すぎると施工が難しく、狭すぎると断熱層全体を形成するための単位発泡工程の数が多くなり、面倒である。単位断熱層の幅は、２〜８ｍであることが好ましい。断熱層の厚さは、要求される断熱性に応じて設定されるが、一般的には２０ｍｍ〜２００ｍｍである。   The width of the unit heat insulation layer is appropriately set according to the size of the heat insulation layer to be constructed and the equipment to be used, but if the width is too wide, the construction is difficult, and if it is too narrow, the entire heat insulation layer is formed. The number of unit foaming steps increases and is troublesome. It is preferable that the width | variety of a unit heat insulation layer is 2-8 m. Although the thickness of a heat insulation layer is set according to the heat insulation requested | required, generally it is 20 mm-200 mm.

側部端面成形部材８は先行形成された単位断熱層６の厚みと同等な厚みを有するものであり、基体壁面に沿って、その外表面に接するようにして上昇する。側部端面成形部材８の離型シート保持面の形状は特に限定されるものではないが、接着面積を広くすることができ、その結果単位断熱層間の全接着力を高くすることができることから、基体壁面に対して傾斜した面を形成する形状や湾曲ないし略円弧状であることが好ましい。   The side portion end face molding member 8 has a thickness equivalent to the thickness of the unit heat insulating layer 6 formed in advance, and rises along the base wall surface so as to be in contact with the outer surface. The shape of the release sheet holding surface of the side end surface molding member 8 is not particularly limited, but the adhesive area can be widened, and as a result, the total adhesive force between the unit heat insulating layers can be increased, A shape that forms an inclined surface with respect to the wall surface of the substrate, or a curved or substantially arc shape is preferable.

離型シートと表面材とは、それ自体の剛性が乏しいので、発泡原液組成物が供給され、発泡硬化するまでの間は成形空間を所定形状に保持する必要があり、側部端面成形部材８及び表面成形部材としてのパネル５にてそれぞれ支持する。成形空間の下面は単位発泡工程の初期においては基体の設置面であり、発泡工程の進行により硬質ポリウレタンフォームとなる。また最初の単位発泡工程においては、先行する単位断熱層が存在しないので、断熱層の起点となる壁などの構造物の壁面を成形空間の一部として使用してもよく、断熱層が円形の被断熱物の周囲を囲む場合には底部からその高さ方向にわたり、仮の縦枠ないしスペーサー（図示略）を固定して施工する。   Since the release sheet and the surface material themselves have poor rigidity, it is necessary to keep the molding space in a predetermined shape until the foaming stock solution composition is supplied and the foam is cured, and the side end face molding member 8 And a panel 5 as a surface molding member. The lower surface of the molding space is a base installation surface in the initial stage of the unit foaming process, and becomes a rigid polyurethane foam as the foaming process proceeds. In the first unit foaming step, since there is no preceding unit heat insulating layer, the wall surface of a structure such as a wall that is the starting point of the heat insulating layer may be used as a part of the molding space. When surrounding the object to be insulated, a temporary vertical frame or a spacer (not shown) is fixed from the bottom to the height direction.

ミキシングヘッド２０は、ミキシングヘッド本体２４と吐出ノズル２２を備え、吐出ノズル２２の先端には必要に応じてホース２が装着される。ミキシングヘッド本体２４にはサービスタンクよりポリオール成分とポリイソシアネート成分を供給する配管２６、２８が接続されている。単位発泡工程においては、ミキシングヘッド２０は左右に往復動を行ってもよい（図１矢印Ａ）。   The mixing head 20 includes a mixing head main body 24 and a discharge nozzle 22, and a hose 2 is attached to the tip of the discharge nozzle 22 as necessary. Pipes 26 and 28 for supplying a polyol component and a polyisocyanate component from a service tank are connected to the mixing head body 24. In the unit foaming step, the mixing head 20 may reciprocate left and right (arrow A in FIG. 1).

離型シート３は、硬化反応が終了した部分から剥離除去する（図１の矢印Ｂ）ことにより、次の単位発泡工程における成形空間の一部を形成する。   The release sheet 3 forms a part of the molding space in the next unit foaming step by peeling and removing from the portion where the curing reaction has ended (arrow B in FIG. 1).

＜断熱層施工例＞
（実施例１〜５、比較例１）
市販の硬質ポリウレタンフォーム原液を使用し、図１に示した方法にて厚さ６５ｍｍ、表面ガラスメッシュ、離型紙を供給して高さ５ｍ，幅１．１ｍの硬質ポリウレタンフォームからなる単位断熱層を２つ形成した。実施例１〜５においては離型シートとして市販の離型紙を使用し、比較例１では特許文献１のように端面をプライマー処理したスペーサーを基体壁面に貼着して使用した
＜評価＞
（剥離力）
離型シートの離型面に幅５０ｍｍのＰＥＴを基材とする市販の粘着テープ（品番＃５９５：積水化学工業）を貼着してゴムローラーにて圧着し、７０℃±５℃にて２０ｇ／ｃｍ2の圧力を負荷して２０時間放置し、冷却後クロスヘッド速度３００ｍｍ／ｍｉｎにて１８０度剥離試験を行い、離型シートの剥離力（離型性）を測定した。 <Example of thermal insulation layer construction>
(Examples 1-5, Comparative Example 1)
A unit heat insulating layer made of a rigid polyurethane foam having a height of 5 m and a width of 1.1 m is obtained by using a commercially available stock solution of rigid polyurethane foam and supplying a 65 mm thick, surface glass mesh and release paper by the method shown in FIG. Two were formed. In Examples 1 to 5, a commercially available release paper was used as the release sheet, and in Comparative Example 1, a spacer whose end face was primer-treated as in Patent Document 1 was attached to a substrate wall surface. <Evaluation>
(Peeling force)
A commercially available adhesive tape (Product No. # 595: Sekisui Chemical Co., Ltd.) based on PET having a width of 50 mm is attached to the release surface of the release sheet and pressure-bonded with a rubber roller, and 20 g at 70 ° C. ± 5 ° C. A pressure of / cm 2 was applied and left for 20 hours. After cooling, a 180 ° peel test was performed at a crosshead speed of 300 mm / min, and the release force (release property) of the release sheet was measured.

（作業性）
単位発泡工程の作業の容易さを評価した。 (Workability)
The ease of operation of the unit foaming process was evaluated.

（層間接着強度）
層間接着強度は、単位幅の断熱層の界面を含む箇所から界面を略中央になるようにした試験片（ＡＳＴＭ Ｄ １６２３。試験片：タイプＢ）を切り出し、ＡＳＴＭ Ｄ １６２３に準拠した引張試験方法により引っ張り、その破断強度を測定し、１０点の平均値を採用した。 (Interlayer adhesion strength)
Interlaminar adhesion strength is a tensile test method in accordance with ASTM D 1623 by cutting out a test piece (ASTM D 1623. Test piece: Type B) from the location including the interface of the heat insulating layer having a unit width. And the breaking strength was measured, and an average value of 10 points was adopted.

＜評価結果＞
評価結果は表１に示した。この評価結果より本発明の離型シートを使用して単位発泡工程を行う施工方法では作業が容易であると共に単位断熱層の層間接着強度も良好であった。これに対して特許文献１記載の施工方法は作業性に問題があった。なお、剥離力が１５０ｍＮ／５０ｍｍの離型紙を使用した場合には単位断熱層の層間接着強度は低すぎて問題があり、剥離力が６００ｍＮ／５０ｍｍの離型紙を使用した場合には単位発泡工程終了後の離型紙の剥離の際に離型紙が破損する場合があり、作業性に問題があった。 <Evaluation results>
The evaluation results are shown in Table 1. From this evaluation result, the construction method in which the unit foaming process was performed using the release sheet of the present invention was easy and the interlaminar bond strength of the unit heat insulating layer was also good. On the other hand, the construction method described in Patent Document 1 has a problem in workability. When a release paper having a peeling force of 150 mN / 50 mm is used, there is a problem in that the interlayer adhesive strength of the unit heat insulating layer is too low, and when a release paper having a peeling force of 600 mN / 50 mm is used, a unit foaming step When the release paper is peeled off after completion, the release paper may be damaged, which causes a problem in workability.

Figure 2006283445
Figure 2006283445

本発明の好適な実施形態に係る硬質ポリウレタンフォーム断熱層の施工方法を例示した斜視図The perspective view which illustrated the construction method of the rigid polyurethane foam heat insulation layer concerning the suitable embodiment of the present invention. 図１に例示の施工方法の基体壁面に平行方向の縦断側面図1 is a longitudinal side view of the construction method illustrated in FIG. 図１に例示の施工方法の基体壁面に垂直方向の縦断側面図1 is a vertical side view of the construction method illustrated in FIG.

符号の説明Explanation of symbols

３ 離型シート
７ 硬質ポリウレタンフォーム
１１ 表面材
２０ ミキシングヘッド 3 Release sheet 7 Hard polyurethane foam 11 Surface material 20 Mixing head

Claims (2)

基体壁面に接した硬質ポリウレタンフォーム断熱層の施工方法であって、
ミキシングヘッド、表面成形部材、表面材供給装置、側部端面成形部材、及び離型シート供給装置を備えた発泡装置を使用するものであり、
前記硬質ポリウレタンフォーム断熱層は幅方向に複数の単位断熱層が施工・接合されたものであり、
前記単位断熱層は前記発泡装置を幅方向に移動させて単位発泡工程を繰り返して施工するものであり、
前記単位発泡工程は、前記表面成形部材に沿って表面材を前記表面材供給装置から供給する表面材供給工程、前記側部端面成形部材に沿って離型シートを前記離型シート供給装置から供給する離型シート供給工程、基体壁面、表面成形部材に沿って供給された前記表面材及び側部端面成形部材に沿って供給された前記離型シートにて形成された成形空間に前記ミキシングヘッドから発泡原液組成物を供給して発泡させて硬質ポリウレタンフォームとする発泡工程、及び発泡硬化後の硬質ポリウレタンフォームから前記離型シートを剥離除去して単位断熱層とする離型シート剥離工程を有し、
前記離型シートは、剥離力が１５０〜６００ｍＮ／５０ｍｍである硬質ポリウレタンフォーム断熱層の施工方法。 It is a construction method of a hard polyurethane foam heat insulating layer in contact with a substrate wall surface,
A mixing head, a surface molding member, a surface material supply device, a side end surface molding member, and a foaming device including a release sheet supply device are used.
The hard polyurethane foam heat insulating layer is constructed by joining and joining a plurality of unit heat insulating layers in the width direction,
The unit heat insulation layer is constructed by repeating the unit foaming process by moving the foaming device in the width direction,
The unit foaming step includes a surface material supply step of supplying a surface material from the surface material supply device along the surface molding member, and a release sheet is supplied from the release sheet supply device along the side end surface molding member. From the mixing head to the forming space formed by the release sheet supplying step, the base wall surface, the surface material supplied along the surface forming member, and the release sheet supplied along the side end surface forming member. A foaming step of supplying a foamed stock solution composition to foam and forming a rigid polyurethane foam, and a release sheet peeling step of peeling and removing the release sheet from the hard polyurethane foam after foam curing to form a unit heat insulating layer ,
The said release sheet is a construction method of the hard polyurethane foam heat insulation layer whose peeling force is 150-600 mN / 50mm. 前記単位発泡工程は前記表面成形部材と前記側部端面成形部材とを、それぞれ前記表面材と前記離型シートとを供給させつつ底部から上方へ移動させると共に前記ミキシングヘッドも底部から上方に移動させつつ単位断熱層を施工するものである請求項１に記載の硬質ポリウレタンフォーム断熱層の施工方法。   In the unit foaming step, the surface molding member and the side end surface molding member are moved upward from the bottom while supplying the surface material and the release sheet, respectively, and the mixing head is also moved upward from the bottom. The construction method of the hard polyurethane foam heat insulation layer according to claim 1, wherein the unit heat insulation layer is constructed.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008240808A (en) * 2007-03-26 2008-10-09 Osaka Gas Co Ltd Heat insulation layer construction method for low temperature tank wall surface
JP2015040580A (en) * 2013-08-21 2015-03-02 東洋ゴム工業株式会社 Surface layer construction method of wall surface
JP2015040049A (en) * 2013-08-21 2015-03-02 東洋ゴム工業株式会社 Surface layer construction device for wall surface
JP2020200076A (en) * 2019-06-10 2020-12-17 三菱重工業株式会社 Heat insulating material construction device, heat insulating material construction method

Citations (2)

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JP2003105312A (en) * 2001-09-28 2003-04-09 Nitto Denko Corp Long-chain alkyl pendant-based release processing agent and method for conducting release processing
JP2004143688A (en) * 2002-10-22 2004-05-20 Osaka Gas Co Ltd Thermal insulation construction method for wall surface of low-temperature tank

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Publication number Priority date Publication date Assignee Title
JP2003105312A (en) * 2001-09-28 2003-04-09 Nitto Denko Corp Long-chain alkyl pendant-based release processing agent and method for conducting release processing
JP2004143688A (en) * 2002-10-22 2004-05-20 Osaka Gas Co Ltd Thermal insulation construction method for wall surface of low-temperature tank

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008240808A (en) * 2007-03-26 2008-10-09 Osaka Gas Co Ltd Heat insulation layer construction method for low temperature tank wall surface
JP2015040580A (en) * 2013-08-21 2015-03-02 東洋ゴム工業株式会社 Surface layer construction method of wall surface
JP2015040049A (en) * 2013-08-21 2015-03-02 東洋ゴム工業株式会社 Surface layer construction device for wall surface
JP2020200076A (en) * 2019-06-10 2020-12-17 三菱重工業株式会社 Heat insulating material construction device, heat insulating material construction method

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