JP4495057B2 - Insulating material for metal roof and manufacturing method thereof - Google Patents

Insulating material for metal roof and manufacturing method thereof Download PDF

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JP4495057B2
JP4495057B2 JP2005268726A JP2005268726A JP4495057B2 JP 4495057 B2 JP4495057 B2 JP 4495057B2 JP 2005268726 A JP2005268726 A JP 2005268726A JP 2005268726 A JP2005268726 A JP 2005268726A JP 4495057 B2 JP4495057 B2 JP 4495057B2
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foam sheet
polyolefin
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metal
adhesive layer
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JP2007077711A (en
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博保 村上
孝之 亀下
恵理子 鈴木
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THE FURUKAW ELECTRIC CO., LTD.
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Description

本発明は、ポリオレフィン系発泡体シートを用いた金属屋根用断熱材およびその製造方法に関する。   The present invention relates to a heat insulating material for metal roof using a polyolefin-based foam sheet and a method for producing the same.

従来、金属屋根の断熱材には、金属屋根の結露防止や、保温、保冷等の遮熱性能の点から、ポリオレフィン系発泡体シートが多用されている。その場合、上記発泡体シートには、加熱処理により金属屋根材に熱貼合可能なプライマー剤を予め塗工し、その後金属屋根材と熱貼合あるいは接着剤を使用した糊貼合を行い、さらに発泡体シートを貼合した金属屋根材の折り曲げ加工を行っている。   Conventionally, polyolefin foam sheets have been frequently used as heat insulating materials for metal roofs from the viewpoints of preventing condensation on the metal roof and heat insulation performance such as heat insulation and cold insulation. In that case, the foam sheet is pre-coated with a primer agent that can be heat bonded to the metal roofing material by heat treatment, and then the metal roofing material and heat bonding or glue bonding using an adhesive, Furthermore, the metal roofing material bonded with the foam sheet is bent.

上記の金属屋根材に貼合した発泡体シートには、折り曲げ加工を行う時に適度な接着力が要求されるので、金属屋根材に対する接着力を低下させた発泡体シートを用いることはできない。そのため、建築物の老朽化等により金属屋根を解体する際には、発泡体シートと金属屋根材とが強固に接着してしまっており、発泡体シートと金属屋根材とを分別・解体することは困難であり、断熱材付き金属板として産業廃棄物扱いで処理することを余儀なくされている。   Since the foam sheet bonded to the metal roof material requires an appropriate adhesive force when performing the bending process, it is not possible to use the foam sheet having a reduced adhesive force to the metal roof material. Therefore, when the metal roof is demolished due to the aging of the building, the foam sheet and the metal roof material are firmly bonded, and the foam sheet and the metal roof material are separated and dismantled. Is difficult and is forced to be treated as industrial waste as a metal plate with insulation.

そこで、環境悪化を防止する点から、金属屋根材に貼合して折り曲げ加工を行う際には十分な粘着力を有し、金属屋根を解体する際には発泡体シートと金属屋根材とを分別・解体することが容易な金属屋根用断熱材として、発泡体シートの粘着加工面の表皮強さが700kPa以上であり、かつ当該粘着加工面の金属板および当該粘着加工自裏面に対する粘着力が0.5N/cm以下である金属屋根断熱用ポリオレフィン系発泡体シートが提案されている(特許文献1参照)。   Therefore, from the viewpoint of preventing environmental degradation, it has sufficient adhesive strength when it is bonded to a metal roof material and bent, and when the metal roof is disassembled, a foam sheet and a metal roof material are used. As a heat insulating material for metal roofs that can be easily separated and disassembled, the adhesive strength of the foam sheet is 700 kPa or more, and the adhesive strength of the adhesive sheet to the metal plate and the adhesive processing back surface A polyolefin foam sheet for heat insulation of metal roofs of 0.5 N / cm or less has been proposed (see Patent Document 1).

特開2004−44142号公報JP 2004-44142 A

しかしながら、夏場の金属屋根は温度が70℃を超える高温となり、このような厳しい温度条件下に曝された場合、特許文献1に示されたような従来の粘着加工を施した発泡体シートでは、粘着加工面の粘着力が増して金属屋根材に強固に貼着し、発泡体シートと金属屋根材とを分別・解体することが困難となり、発泡体シートの表面が材料破壊によって金属屋根材上に残ってしまうことがあった。   However, the metal roof in summer has a high temperature exceeding 70 ° C., and when exposed to such severe temperature conditions, in the foam sheet subjected to conventional adhesive processing as shown in Patent Document 1, Adhesive strength of the adhesive processed surface increases and it adheres firmly to the metal roofing material, making it difficult to separate and dismantle the foam sheet from the metal roofing material. Sometimes left behind.

本発明は、前述した事情に鑑みてなされたもので、ポリオレフィン系発泡体シートを用いた金属屋根用断熱材であって、金属屋根材に貼合して折り曲げ加工を行う際には十分な粘着力を有し、金属屋根を解体する際には、どのような厳しい温度条件下に曝された後でも、発泡体シートと金属屋根材とを容易に分別・解体することが可能な金属屋根用断熱材とその製造方法を提供することを目的とする。   The present invention has been made in view of the above-described circumstances, and is a metal roof heat insulating material using a polyolefin-based foam sheet, which is sufficiently adhesive when it is bonded to a metal roof material and bent. For metal roofs that have power and can easily separate and dismantle foam sheets and metal roofing materials after being exposed to any severe temperature conditions It aims at providing a heat insulating material and its manufacturing method.

本発明者らは、前記目的を達成するために種々検討を行った結果、発泡体シートの表面にフィルムを貼合することで、発泡体シートの表皮強さを向上させて1000kPa以上となるようにし、このフィルム上に粘着加工を行うとともに、上記粘着加工面の金属屋根材および発泡体シートの裏面に対する粘着力が1.0N/cm以下となるようにすれば、金属屋根が高温に曝された場合、例えば夏場の想定温度を超える80℃の高温に曝された場合でも、発泡体シートと金属屋根材とを容易に分別・解体できることを見出した。   As a result of various investigations to achieve the above object, the present inventors have improved the skin strength of the foam sheet to be 1000 kPa or more by bonding a film to the surface of the foam sheet. When the adhesive processing is performed on the film and the adhesive strength of the adhesive processing surface to the metal roofing material and the back surface of the foam sheet is 1.0 N / cm or less, the metal roof is exposed to a high temperature. In this case, for example, it was found that the foam sheet and the metal roofing material can be easily separated and disassembled even when exposed to a high temperature of 80 ° C. exceeding the expected temperature in summer.

本発明は、上述した知見に基づいてなされたもので、ポリオレフィン系発泡体シートと、前記ポリオレフィン系発泡体シートの一面に貼合されたフィルムと、前記フィルム上に形成された粘着層とを具備し、前記粘着層を金属屋根材に粘着させる金属屋根用断熱材であって、前記一面にフィルムが貼合されたフィルム貼合面の表皮強さが1000kPa以上であり、かつ、前記粘着層と前記金属屋根材との粘着力および前記粘着層と前記ポリオレフィン系発泡体シートの他面との粘着力がそれぞれ1.0N/cm以下であることを特徴とする金属屋根用断熱材を提供する。 The present invention has been made based on the above-described knowledge, and includes a polyolefin-based foam sheet, a film bonded to one surface of the polyolefin-based foam sheet, and an adhesive layer formed on the film. And a metal roof heat insulating material for adhering the adhesive layer to a metal roof material, the skin strength of the film bonding surface in which a film is bonded to the one surface is 1000 kPa or more, and the adhesive layer and Provided is a heat insulating material for a metal roof, characterized in that an adhesive force with the metal roof material and an adhesive force between the adhesive layer and the other surface of the polyolefin-based foam sheet are each 1.0 N / cm or less.

本発明に係る金属屋根用断熱材は、金属屋根材に貼合して折り曲げ加工を行う際には十分な粘着力を有し、また、金属屋根が70℃を超える高温に曝された場合でも、断熱材と金属屋根材とを容易に分別・解体することが可能であり、解体後の金属屋根材を産業廃棄物とするのではなく、リサイクル可能な状態に分別することができる。さらに、発泡体シートの粘着加工面に離型シートを適用したり、発泡体シートの粘着加工面の裏面に離型処理を施したりすることなく、断熱材をロール状で供給することができ、金属屋根材と円滑に貼合することが可能である。   The heat insulating material for a metal roof according to the present invention has a sufficient adhesive force when it is bonded to a metal roof material and bent, and even when the metal roof is exposed to a high temperature exceeding 70 ° C. In addition, the heat insulating material and the metal roof material can be easily separated and disassembled, and the metal roof material after disassembly can be separated into a recyclable state instead of being made into industrial waste. Furthermore, without applying a release sheet to the pressure-sensitive adhesive surface of the foam sheet or performing a release treatment on the back surface of the pressure-sensitive adhesive surface of the foam sheet, the heat insulating material can be supplied in roll form, It can be smoothly bonded to metal roofing materials.

以下、本発明につきさらに詳しく説明する。本発明の金属屋根用断熱材は、図1に示すように、ポリオレフィン系発泡体シート10と、ポリオレフィン系発泡体シート10の一面12に貼合されたフィルム14と、フィルム14上に形成された粘着層16とを具備するものである。   Hereinafter, the present invention will be described in more detail. As shown in FIG. 1, the heat insulating material for a metal roof of the present invention was formed on a polyolefin foam sheet 10, a film 14 bonded to one surface 12 of the polyolefin foam sheet 10, and the film 14. The adhesive layer 16 is provided.

ポリオレフィン系発泡体シートとしては、例えばポリエチレン発泡体シートを好適に用いることができるが、これに限定されるものではない。また、ポリオレフィン系発泡体シートとしては、独立気泡構造を有するものが好ましい。独立気泡構造を有するポリオレフィン系発泡体シートは、独立気泡層が空気層を形成し、安定した熱伝導率を維持するため、より効果的な断熱効果を発揮する。具体的には、独立気泡構造を有するポリオレフィン系発泡体シートとして、古河電気工業株式会社フォームエース(登録商標、以下同じ)、積水化学工業株式会社ソフトロン(登録商標)、日立化成工業株式会社ハイエチレンを例示することができる。なお、ポリオレフィン系発泡体シートの密度、厚さなどは、断熱材の目的等に応じて適宜選択することができる。 As the polyolefin-based foam sheet, for example, a polyethylene foam sheet can be preferably used, but is not limited thereto. Moreover, as a polyolefin-type foam sheet, what has a closed cell structure is preferable. The polyolefin foam sheet having a closed cell structure exhibits a more effective heat insulating effect because the closed cell layer forms an air layer and maintains a stable thermal conductivity. Specifically, as a polyolefin-based foam sheet having a closed cell structure, Furukawa Electric Co., Ltd. Form Ace (registered trademark, the same shall apply hereinafter) , Sekisui Chemical Co., Ltd. Softlon (registered trademark) , Hitachi Chemical Co., Ltd. High Ethylene can be exemplified. In addition, the density, thickness, etc. of a polyolefin-type foam sheet can be suitably selected according to the objective etc. of a heat insulating material.

本発明では、ポリオレフィン系発泡体シートの一面にフィルムを貼合することで、発泡体シートのフィルムを貼合した面(フィルム貼合面)18の表皮強さが1000kPa以上となるようにする。これにより、発泡体シートの表皮強さを向上させて、断熱材を金属屋根材から容易にはく離できるようにしている。上記フィルム貼合面の表皮強さのより好ましい値は1100kPa以上、特に1200〜2500kPaである。   In this invention, the skin strength of the surface (film bonding surface) 18 which bonded the film of the foam sheet becomes 1000 kPa or more by bonding a film to one surface of a polyolefin-type foam sheet. Thereby, the skin strength of the foam sheet is improved so that the heat insulating material can be easily separated from the metal roofing material. The more preferable value of the skin strength of the film bonding surface is 1100 kPa or more, and particularly 1200 to 2500 kPa.

また、断熱材を金属屋根材からさらに容易にはく離できるようにするために、断熱材と金属屋根材との貼合面積を減少させるべく、フィルム貼合後にポリオレフィン系発泡体シートの一面にエンボス等のシボ加工を施すことも有効である。   In addition, in order to reduce the bonding area between the heat insulating material and the metal roof material so that the heat insulating material can be more easily separated from the metal roof material, embossing or the like on one surface of the polyolefin-based foam sheet after film bonding It is also effective to apply the graining.

上記フィルムの材質に特に限定はないが、例えばポリエチレン、EVA、ポリプロピレン、ポリエステル(PET)等からなるものを好適に用いることができる。また、フィルムの厚さにも限定はないが、10〜250μm、特に40〜100μmのものが好ましい。   Although there is no limitation in particular in the material of the said film, For example, what consists of polyethylene, EVA, a polypropylene, polyester (PET) etc. can be used conveniently. Moreover, although there is no limitation also in the thickness of a film, the thing of 10-250 micrometers, especially 40-100 micrometers is preferable.

本発明において、上述した表皮強さは以下の方法により測定される。まず、一面にフィルムが貼合されたポリオレフィン系発泡体シートをJISに規定された引張強さ測定用のダンベル片に打ち抜く。次いで、上記発泡体シートをスライス加工する。発泡体シートをスライス加工する際には、スライス加工面を下に配置して、その両側に厚さ0.4mmの金属スペーサを配置する。この金属スペーサの厚さは、使用される発泡体シートにより適宜設定される。当該金属スペーサの厚さ方向に沿って刃を入れて金属スペーサと同じ厚さのダンベル状試験片を得る。当該試験片を引張速度500mm/分で切断させた時の最大荷重を、当該試験片の幅と厚さの積からなる断面積で除した切断応力を表皮強さとする。   In the present invention, the above-described skin strength is measured by the following method. First, a polyolefin foam sheet having a film bonded on one side is punched into a dumbbell piece for tensile strength measurement specified in JIS. Next, the foam sheet is sliced. When slicing the foam sheet, the slicing surface is disposed below, and metal spacers having a thickness of 0.4 mm are disposed on both sides thereof. The thickness of the metal spacer is appropriately set depending on the foam sheet used. A blade is inserted along the thickness direction of the metal spacer to obtain a dumbbell-shaped test piece having the same thickness as the metal spacer. The cutting strength obtained by dividing the maximum load when the test piece is cut at a tensile speed of 500 mm / min by the cross-sectional area formed by the product of the width and thickness of the test piece is defined as the skin strength.

本発明では、前述したフィルム上に粘着層を形成し、粘着層と金属屋根材との粘着力および粘着層とポリオレフィン系発泡体シートの他面20との粘着力がそれぞれ1.0N/cm以下になるようにする。これにより、金属屋根材に貼合して折り曲げ加工を行う際には十分な粘着力を有し、かつ、金属屋根を解体する際には断熱材を金属屋根材から容易にはく離できるようにするとともに、前述した離型シートの適用や離型処理を要することなく、断熱材をロール状で供給できるようにしている。上記粘着力のより好ましい値は0.5N/cm以下、特に0.2〜0.5N/cmである。   In the present invention, an adhesive layer is formed on the above-described film, and the adhesive force between the adhesive layer and the metal roofing material and the adhesive force between the adhesive layer and the other surface 20 of the polyolefin-based foam sheet are each 1.0 N / cm or less. To be. As a result, it has sufficient adhesive strength when it is bonded to a metal roof material and bent, and when the metal roof is disassembled, the heat insulating material can be easily separated from the metal roof material. At the same time, the heat insulating material can be supplied in a roll shape without requiring the application of the release sheet and the release treatment. A more preferable value of the adhesive strength is 0.5 N / cm or less, particularly 0.2 to 0.5 N / cm.

上記粘着層を形成する粘着剤の材質に特に限定はないが、例えばアクリル系粘着剤を好適に用いることができる。本発明では、粘着剤の塗工量や材料を適宜選択して、前述した粘着力が所定の範囲となるようにすればよい。また、粘着剤とフィルムとの接合をより強固なものにするために、コロナ処理等の表面処理を施したフィルムを使用してもよい。   Although the material of the adhesive which forms the said adhesion layer is not specifically limited, For example, an acrylic adhesive can be used suitably. In the present invention, the pressure-sensitive adhesive coating amount and material may be appropriately selected so that the above-mentioned adhesive strength falls within a predetermined range. Moreover, in order to make the bonding between the pressure-sensitive adhesive and the film stronger, a film subjected to a surface treatment such as a corona treatment may be used.

本発明において、上述した粘着層と金属屋根材との粘着力は以下の方法により測定される。すなわち、折板屋根として使用される金属板を用い、フィルム上に粘着層を形成したポリオレフィン系発泡体シートを25mm幅に裁断して上記金属板に粘着層を下にして載置し、質量2kgのゴムローラーを用いて発泡体シートを金属板に圧着し、200mm/分のはく離速度にてはく離試験を行ったときのはく離強さを金属面に対する粘着力とする。   In this invention, the adhesive force of the adhesion layer mentioned above and a metal roof material is measured with the following method. That is, using a metal plate used as a folded plate roof, a polyolefin foam sheet having an adhesive layer formed on a film is cut into a width of 25 mm and placed on the metal plate with the adhesive layer facing downward, and a mass of 2 kg. The foam sheet is pressure-bonded to a metal plate using a rubber roller, and the peel strength when the peel test is performed at a peel speed of 200 mm / min is defined as the adhesive strength to the metal surface.

本発明において、上述した粘着層とポリオレフィン系発泡体シートの他面との粘着力は以下の方法により測定される。フィルム上に粘着層を形成したポリオレフィン系発泡体シートを25mm幅に裁断した2枚の試験片を用意し、1枚目の試験片の粘着層と、他の試験片の粘着層形成面の反対面とを重ね合せ、上記金属面に対する粘着力の測定方法と同条件で貼着した後、200mm/分のはく離速度にてはく離試験を行ったときのはく離強さをポリオレフィン系発泡体シートの他面に対する粘着力とする。   In this invention, the adhesive force of the adhesion layer mentioned above and the other surface of the polyolefin-type foam sheet is measured by the following method. Prepare two test pieces obtained by cutting a polyolefin foam sheet having an adhesive layer formed on the film into a width of 25 mm, and the adhesive layer of the first test piece is opposite to the adhesive layer forming surface of the other test piece. The peel strength when the peel test was conducted at a peel rate of 200 mm / min after overlapping with the surface and pasting under the same conditions as the method for measuring the adhesive strength to the metal surface was conducted in addition to the polyolefin foam sheet. Adhesive strength to the surface.

本発明に係る金属屋根用断熱材の製造方法に限定はないが、下記(a)、(b)の方法を好適に採用することができる。
(a)独立気泡構造を有するポリオレフィン系発泡体シートの片面にスライス加工を施す工程と、前記ポリオレフィン系発泡体シートのスライス加工を施した面の反対面にフィルムを貼合して、そのフィルムを貼合した面の表皮強さが1000kPa以上となるようにする工程と、前記フィルム上に粘着層を形成して、当該粘着層と前記金属屋根材との粘着力および当該粘着層と前記ポリオレフィン系発泡体シートのスライス加工を施した面との粘着力がそれぞれ1.0N/cm以下となるようにする工程とを行う製造方法。
(b)独立気泡構造を有するポリオレフィン系発泡体シートの両面にフィルムを貼合して、それらフィルムを貼合した面の表皮強さが1000kPa以上となるようにする工程と、前記両面にフィルムを貼合したポリオレフィン系発泡体シートの片面にスライス加工を施す工程と、前記ポリオレフィン系発泡体シートのスライス加工を施した面の反対面のフィルム上に粘着層を形成して、当該粘着層と前記金属屋根材との粘着力および当該粘着層と前記ポリオレフィン系発泡体シートのスライス加工を施した面との粘着力がそれぞれ1.0N/cm以下となるようにする工程とを行う製造方法。
Although there is no limitation in the manufacturing method of the heat insulating material for metal roofs which concerns on this invention, the method of following (a) and (b) can be employ | adopted suitably.
(A) A step of slicing one side of a polyolefin-based foam sheet having a closed-cell structure, and a film bonded to the opposite side of the surface of the polyolefin-based foam sheet subjected to slicing, The process of making the skin strength of the bonded surface be 1000 kPa or more, forming an adhesive layer on the film, the adhesive force between the adhesive layer and the metal roofing material, and the adhesive layer and the polyolefin system The manufacturing method which performs the process which makes the adhesive force with the surface which gave the slice process of the foam sheet | seat each become 1.0 N / cm or less.
(B) a step of bonding films on both surfaces of a polyolefin-based foam sheet having a closed-cell structure, and having the skin strength of the surfaces on which the films are bonded be 1000 kPa or more; A step of slicing one side of the bonded polyolefin foam sheet, and forming an adhesive layer on the film opposite to the surface of the polyolefin foam sheet subjected to slicing, the adhesive layer and the The manufacturing method which performs the process of making the adhesive force with the metal roofing material and the adhesive force of the said adhesion layer and the surface which gave the slice process of the said polyolefin-type foam sheet each become 1.0 N / cm or less.

上記スライス加工は、断熱材による結露水の保水および断熱材の外傷防止のために行われるものであり、発泡体シートの厚さ方向を回転刃によって半裁にするような方法で適宜実施される。   The slicing process is performed in order to retain the condensed water by the heat insulating material and prevent the heat insulating material from being damaged, and is appropriately performed by a method in which the thickness direction of the foam sheet is cut in half by a rotary blade.

本発明においては、以上のような構成を採用することにより、金属屋根の温度が70℃を超える高温となった場合でも、断熱材と金属屋根材とを容易に分別・解体することが可能である。また、粘着加工品としては従来必要であった粘着加工面への離型シートの適用や、粘着加工面の反対面への離型処理の付与をしなくても、断熱材をロール状で供給することができ、金属屋根材と円滑に貼合することができる。この場合、粘着加工面と金属面との粘着力の特定は、金属屋根材を折り曲げ加工し、また金属屋根を解体する際に必要であるのに対し、粘着加工面とその反対面との粘着力の特定は、断熱材をロール状に巻き取った際に粘着加工面のはく離を容易に行うために必要であり、本発明においてはいずれの場合にも問題を起こすことがない。   In the present invention, by adopting the configuration as described above, even when the temperature of the metal roof reaches a high temperature exceeding 70 ° C., it is possible to easily separate and disassemble the heat insulating material and the metal roof material. is there. In addition, as an adhesive processed product, heat insulation is supplied in roll form without applying a release sheet to the adhesive processing surface, which was required in the past, or applying a release treatment to the opposite surface of the adhesive processing surface. Can be smoothly bonded to the metal roofing material. In this case, the adhesive strength between the adhesive processed surface and the metal surface is necessary when bending the metal roofing material and dismantling the metal roof, whereas the adhesion between the adhesive processed surface and the opposite surface is required. The identification of the force is necessary in order to easily peel off the adhesive-processed surface when the heat insulating material is rolled up, and in the present invention, no problem occurs.

次に、本発明の実施例を示すが、本発明は下記例に限定されるものではない。   Next, although the Example of this invention is shown, this invention is not limited to the following example.

(実施例1)
密度25kg/mの架橋発泡ポリエチレンシート(商品名:フォームエース、古河電気工業株式会社製)に厚さ40μmのコロナ処理付きポリエチレンフィルムを熱貼合した。架橋発泡ポリエチレンシートのポリエチレンフィルム貼合面の表皮強さは1650kPaであった。次に、ポリエチレンフィルムのコロナ処理面にアクリル系粘着剤(綜研化学株式会社製)を30g/m塗布して本発明の金属屋根用断熱材を作製した。得られた金属屋根用断熱材の粘着層と亜鉛めっき鋼板とを貼り合わせた後、所定の形状に折り曲げ加工した。加工後に200mm/分のはく離速度にてはく離強さを測定したところ、粘着層と鋼板面とのはく離強さは0.3N/cmであった。また、断熱材を80℃の恒温槽に744時間放置した後にはく離試験を行ったところ、粘着層と鋼板面とのはく離強さは1.0N/cmであり、鋼板面に発泡体シートを残すことなくはく離することができた。さらに、粘着層と架橋発泡ポリエチレンシートのフィルムを貼合していない面とのはく離強さは0.11N/cmであった。
Example 1
A polyethylene film with a corona treatment having a thickness of 40 μm was thermally bonded to a crosslinked foamed polyethylene sheet having a density of 25 kg / m 3 (trade name: Foam Ace, manufactured by Furukawa Electric Co., Ltd.). The skin strength of the polyethylene film bonding surface of the crosslinked foamed polyethylene sheet was 1650 kPa. Next, 30 g / m 2 of acrylic pressure-sensitive adhesive (manufactured by Soken Chemical Co., Ltd.) was applied to the corona-treated surface of the polyethylene film to produce the metal roof heat insulating material of the present invention. After sticking the adhesion layer of the obtained heat insulating material for metal roofs, and the galvanized steel sheet, it was bent into a predetermined shape. When the peel strength was measured at a peel speed of 200 mm / min after processing, the peel strength between the adhesive layer and the steel sheet surface was 0.3 N / cm. Further, when the peel test was performed after the heat insulating material was left in a thermostat at 80 ° C. for 744 hours, the peel strength between the adhesive layer and the steel plate surface was 1.0 N / cm, and the foam sheet was left on the steel plate surface. It was possible to release without any problem. Furthermore, the peel strength between the adhesive layer and the surface on which the film of the crosslinked foamed polyethylene sheet was not bonded was 0.11 N / cm.

(実施例2)
密度25kg/mの架橋発泡ポリエチレンシート(商品名:フォームエース、古河電気工業株式会社製)に厚さ40μmのコロナ処理付きポリエチレンフィルムを熱貼合した。架橋発泡ポリエチレンシートのポリエチレンフィルム貼合面の表皮強さは1085kPaであった。その後、架橋発泡ポリエチレンシートのポリエチレンフィルム貼合面に、底辺2mm、高さ1mmの四角ピラミッド型シボ加工を施した。次に、ポリエチレンフィルムのコロナ処理面にアクリル系粘着剤(綜研化学株式会社製)を30g/m塗布して本発明の金属屋根用断熱材を作製した。得られた金属屋根用断熱材の粘着層と亜鉛めっき鋼板とを貼り合わせた後、所定の形状に折り曲げ加工した。加工後に200mm/分のはく離速度にてはく離強さを測定したところ、粘着層と鋼板面とのはく離強さは0.2N/cmであった。また、断熱材を80℃の恒温槽に744時間放置した後にはく離試験を行ったところ、粘着層と鋼板面とのはく離強さは0.6N/cmであり、鋼板面に発泡体シートを残すことなくはく離することができた。さらに、粘着層と架橋発泡ポリエチレンシートのフィルムを貼合していない面とのはく離強さは0.08N/cmであった。
(Example 2)
A polyethylene film with a corona treatment having a thickness of 40 μm was thermally bonded to a crosslinked foamed polyethylene sheet having a density of 25 kg / m 3 (trade name: Foam Ace, manufactured by Furukawa Electric Co., Ltd.). The skin strength of the polyethylene film bonding surface of the crosslinked foamed polyethylene sheet was 1085 kPa. Thereafter, a square pyramid-type embossing with a bottom of 2 mm and a height of 1 mm was applied to the polyethylene film bonding surface of the crosslinked foamed polyethylene sheet. Next, 30 g / m 2 of acrylic pressure-sensitive adhesive (manufactured by Soken Chemical Co., Ltd.) was applied to the corona-treated surface of the polyethylene film to produce the metal roof heat insulating material of the present invention. After sticking the adhesion layer of the obtained heat insulating material for metal roofs, and the galvanized steel sheet, it was bent into a predetermined shape. When the peel strength was measured at a peel speed of 200 mm / min after processing, the peel strength between the adhesive layer and the steel sheet surface was 0.2 N / cm. Further, when the peel test was performed after the heat insulating material was left in a thermostat at 80 ° C. for 744 hours, the peel strength between the adhesive layer and the steel plate surface was 0.6 N / cm, and the foam sheet was left on the steel plate surface. It was possible to release without any problem. Furthermore, the peel strength between the adhesive layer and the surface on which the film of the crosslinked foamed polyethylene sheet was not bonded was 0.08 N / cm.

(比較例1)
密度23kg/m、表皮強さ812kPaの架橋発泡ポリエチレンシート(商品名:フォームエース、古河電気工業株式会社製)の片面にアクリル系粘着剤(綜研化学株式会社製)を30g/m塗布して金属屋根用断熱材を作製した。得られた金属屋根用断熱材の粘着層と亜鉛めっき鋼板とを貼り合わせた後、所定の形状に折り曲げ加工した。加工後に200mm/分のはく離速度にてはく離強さを測定したところ、粘着層と鋼板面とのはく離強さは0.5N/cmであった。また、断熱材を80℃の恒温槽に720時間放置した後にはく離試験を行ったところ、粘着層と鋼板面とのはく離強さは5.8N/cmであり、架橋発泡ポリエチレンシートの表皮が鋼板面に残る材料破壊が観察された。
(Comparative Example 1)
An acrylic adhesive (manufactured by Soken Chemical Co., Ltd.) is applied at 30 g / m 2 on one side of a cross-linked foamed polyethylene sheet (trade name: Foam Ace, manufactured by Furukawa Electric Co., Ltd.) having a density of 23 kg / m 3 and a skin strength of 812 kPa. A metal roof insulation was produced. After sticking the adhesion layer of the obtained heat insulating material for metal roofs, and the galvanized steel plate, it was bent into a predetermined shape. When the peel strength was measured at a peel rate of 200 mm / min after processing, the peel strength between the adhesive layer and the steel sheet surface was 0.5 N / cm. Further, when the peel test was performed after the heat insulating material was left in a constant temperature bath at 80 ° C. for 720 hours, the peel strength between the adhesive layer and the steel plate surface was 5.8 N / cm, and the surface of the cross-linked foamed polyethylene sheet was a steel plate. Material destruction remaining on the surface was observed.

(比較例2)
密度25kg/m、表皮強さ812kPaの架橋発泡ポリエチレンシート(商品名:フォームエース、古河電気工業株式会社製)の片面にアクリル系粘着剤(綜研化学株式会社製)を30g/m塗布して金属屋根用断熱材を作製した。得られた金属屋根用断熱材の粘着層と亜鉛めっき鋼板とを貼り合わせた後、所定の形状に折り曲げ加工した。断熱材を80℃の恒温槽に720時間放置した後にはく離試験を行ったところ、粘着層と鋼板面とのはく離強さは2.0N/cmであり、架橋発泡ポリエチレンシートの表皮の一部が鋼板面に残る材料破壊が観察された。
(Comparative Example 2)
Acrylic adhesive (manufactured by Soken Chemical Co., Ltd.) is applied at 30 g / m 2 on one side of a cross-linked foamed polyethylene sheet (trade name: Foam Ace, manufactured by Furukawa Electric Co., Ltd.) having a density of 25 kg / m 3 and a skin strength of 812 kPa. Thus, a heat insulating material for a metal roof was produced. After sticking the adhesion layer of the obtained heat insulating material for metal roofs, and the galvanized steel sheet, it was bent into a predetermined shape. When the peel test was performed after the heat insulating material was left in a thermostat at 80 ° C. for 720 hours, the peel strength between the adhesive layer and the steel sheet surface was 2.0 N / cm, and a part of the skin of the crosslinked foamed polyethylene sheet was Material destruction remaining on the steel plate surface was observed.

本発明に係る金属屋根用断熱材の一例を示す模式図である。It is a schematic diagram which shows an example of the heat insulating material for metal roofs which concerns on this invention.

符号の説明Explanation of symbols

10 ポリオレフィン系発泡体シート
12 ポリオレフィン系発泡体シートの一面
14 フィルム
16 粘着層
18 発泡体シートのフィルム貼合面
20 ポリオレフィン系発泡体シートの他面
DESCRIPTION OF SYMBOLS 10 Polyolefin-type foam sheet 12 One side of polyolefin-type foam sheet 14 Film 16 Adhesive layer 18 Film bonding surface of foam sheet 20 Other side of polyolefin-type foam sheet

Claims (6)

ポリオレフィン系発泡体シートと、前記ポリオレフィン系発泡体シートの一面に貼合されたフィルムと、前記フィルム上に形成された粘着層とを具備し、前記粘着層を金属屋根材に粘着させる金属屋根用断熱材であって、前記一面にフィルムが貼合されたフィルム貼合面の表皮強さが1000kPa以上であり、かつ、前記粘着層と前記金属屋根材との粘着力および前記粘着層と前記ポリオレフィン系発泡体シートの他面との粘着力がそれぞれ1.0N/cm以下であることを特徴とする金属屋根用断熱材。 For metal roof, comprising a polyolefin foam sheet, a film bonded to one surface of the polyolefin foam sheet, and an adhesive layer formed on the film, and causing the adhesive layer to adhere to a metal roofing material It is a heat insulating material, and the skin strength of the film bonding surface in which the film is bonded to the one surface is 1000 kPa or more, and the adhesive force between the adhesive layer and the metal roof material, and the adhesive layer and the polyolefin A metal roof heat insulating material, wherein the adhesive strength to the other surface of the polyurethane foam sheet is 1.0 N / cm or less. 前記ポリオレフィン系発泡体シートは独立気泡構造を有することを特徴とする請求項1に記載の金属屋根用断熱材。   The heat insulating material for metal roof according to claim 1, wherein the polyolefin-based foam sheet has a closed cell structure. 前記粘着層に離型シートを適用することなく、ポリオレフィン系発泡体シートをロール状に巻いたことを特徴とする請求項1または2に記載の金属屋根用断熱材。   The heat insulating material for metal roof according to claim 1 or 2, wherein a polyolefin-based foam sheet is wound into a roll shape without applying a release sheet to the adhesive layer. 前記ポリオレフィン系発泡体シートの他面に離型処理を施すことなく、ポリオレフィン系発泡体シートをロール状に巻いたことを特徴とする請求項1〜3のいずれか1項に記載の金属屋根用断熱材。   The metal foam for metal roof according to any one of claims 1 to 3, wherein the polyolefin foam sheet is wound in a roll shape without performing a release treatment on the other surface of the polyolefin foam sheet. Insulation. 請求項1〜4のいずれか1項に記載の金属屋根用断熱材の製造方法であって、独立気泡構造を有するポリオレフィン系発泡体シートの片面にスライス加工を施す工程と、前記ポリオレフィン系発泡体シートのスライス加工を施した面の反対面にフィルムを貼合して、そのフィルムを貼合した面の表皮強さが1000kPa以上となるようにする工程と、前記フィルム上に粘着層を形成して、当該粘着層と前記金属屋根材との粘着力および当該粘着層と前記ポリオレフィン系発泡体シートのスライス加工を施した面との粘着力がそれぞれ1.0N/cm以下となるようにする工程とを具備することを特徴とする金属屋根用断熱材の製造方法。   It is a manufacturing method of the heat insulating material for metal roofs of any one of Claims 1-4, Comprising: The process which slices the single side | surface of the polyolefin-type foam sheet which has a closed cell structure, The said polyolefin-type foam A step of pasting a film on the opposite side of the sheet subjected to slicing, and forming an adhesive layer on the film so that the skin strength of the surface on which the film is pasted is 1000 kPa or more; The adhesive force between the adhesive layer and the metal roof material and the adhesive force between the adhesive layer and the surface of the polyolefin foam sheet subjected to slicing are 1.0 N / cm or less, respectively. The manufacturing method of the heat insulating material for metal roofs characterized by these. 請求項1〜4のいずれか1項に記載の金属屋根用断熱材の製造方法であって、独立気泡構造を有するポリオレフィン系発泡体シートの両面にフィルムを貼合して、それらフィルムを貼合した面の表皮強さが1000kPa以上となるようにする工程と、前記両面にフィルムを貼合したポリオレフィン系発泡体シートの片面にスライス加工を施す工程と、前記ポリオレフィン系発泡体シートのスライス加工を施した面の反対面のフィルム上に粘着層を形成して、当該粘着層と前記金属屋根材との粘着力および当該粘着層と前記ポリオレフィン系発泡体シートのスライス加工を施した面との粘着力がそれぞれ1.0N/cm以下となるようにする工程とを具備することを特徴とする金属屋根用断熱材の製造方法。   It is a manufacturing method of the heat insulating material for metal roofs of any one of Claims 1-4, Comprising: A film is bonded on both surfaces of the polyolefin-type foam sheet which has a closed cell structure, and these films are bonded. A step of making the skin strength of the surface to be 1000 kPa or more, a step of slicing one side of the polyolefin foam sheet having a film bonded to both sides, and a slicing process of the polyolefin foam sheet An adhesive layer is formed on the film opposite to the applied surface, and the adhesive force between the adhesive layer and the metal roofing material and the adhesion between the adhesive layer and the surface on which the polyolefin foam sheet is sliced And a step of making each of the forces be 1.0 N / cm or less.
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