JP2010013567A - Adhesive sheet - Google Patents

Adhesive sheet Download PDF

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JP2010013567A
JP2010013567A JP2008175439A JP2008175439A JP2010013567A JP 2010013567 A JP2010013567 A JP 2010013567A JP 2008175439 A JP2008175439 A JP 2008175439A JP 2008175439 A JP2008175439 A JP 2008175439A JP 2010013567 A JP2010013567 A JP 2010013567A
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adhesive
adhesive layer
film
metal
rubber
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JP4681634B2 (en
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Rikito Eguchi
力人 江口
Yoshizo Mizutani
良三 水谷
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NAKASHIMA RUBBER INDUSTRY CO L
NAKASHIMA RUBBER INDUSTRY CO Ltd
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NAKASHIMA RUBBER INDUSTRY CO L
NAKASHIMA RUBBER INDUSTRY CO Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an adhesive sheet bonding an unvulcanized rubber and metal together. <P>SOLUTION: The adhesive sheet 1 for bonding the unvulcanized rubber to metal comprises a film 10 consisting of a polymer compound, an over coating adhesive layer 11 formed by applying a solvent dispersion type vulcanizing adhesive having reactivity with the rubber onto the surface of the film and drying the applied adhesive, and an under coating adhesive layer 12 formed by applying an adhesive having reactivity with the metal onto the surface on the opposite side to the surface for the film of the over coating adhesive layer and drying the applied adhesive. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

この発明は接着シートに関し、特に未加硫ゴムを金属に接合する際に使用する接着シートに関する。   The present invention relates to an adhesive sheet, and more particularly to an adhesive sheet used when joining unvulcanized rubber to a metal.

従来、たとえば特許文献１に開示されるように、金属と未加硫のゴムとを接着剤を解して接着する際に、その接着剤を加熱かつ加圧してゴムを加硫し、ゴムと金属とを接着する方法がある。
特開２００１−２６０２３３号公報 Conventionally, as disclosed in, for example, Patent Document 1, when a metal and an unvulcanized rubber are bonded using an adhesive, the adhesive is heated and pressurized to vulcanize the rubber, There is a method of bonding to metal.
JP 2001-260233 A

このような接着方法では、まず、金属表面に、刷毛やスプレーなどで溶剤分散型加硫接着剤を塗布する必要がある。この作業では、接着剤の溶剤として、揮発性有機化合物（以下、「ＶＯＣ」）が使用される。近年では、作業者の健康の面および環境に対する配慮の面からＶＯＣの排出量の抑制が必要となっており、法律や行政指導による排出規制に加え、各事業者においての自主的な削減の取組が求められている。したがって、接着を行う作業場において、ＶＯＣの排出量の抑制する具体的な手段が必要となる。ＶＯＣの排出量の抑制するためには設備や場所などの作業環境の整備が必要となるが、接着を行う作業場においてこれを行うとその規模が大きくなる。   In such an adhesion method, first, it is necessary to apply a solvent-dispersed vulcanized adhesive to the metal surface with a brush or a spray. In this operation, a volatile organic compound (hereinafter “VOC”) is used as a solvent for the adhesive. In recent years, it has become necessary to reduce VOC emissions from the viewpoint of worker health and environmental considerations, and in addition to emission regulations based on laws and administrative guidance, voluntary reduction efforts by each operator. Is required. Therefore, a specific means for suppressing the VOC emission amount is required in the work place where the bonding is performed. In order to suppress the amount of VOC emission, it is necessary to improve the work environment such as equipment and place.

また、このような接着方法では、溶剤分散型加硫接着剤を薄く塗布する必要があるが、刷毛やスプレーなどで薄い接着剤の塗布層を形成しようとすると、膜厚を均一に管理することが困難となる。さらに塗着効率も悪く、金属面に塗着せずに散逸する接着剤の量も多くなってしまう。そこで、接着工程前に予め、接着剤の揮発性成分を飛ばしてしまうことができれば、便利である。   In addition, in such an adhesion method, it is necessary to apply a solvent-dispersed vulcanized adhesive thinly. However, if a thin adhesive coating layer is formed with a brush or spray, the film thickness must be uniformly controlled. It becomes difficult. Furthermore, the coating efficiency is poor, and the amount of adhesive that dissipates without being applied to the metal surface also increases. Therefore, it is convenient if the volatile components of the adhesive can be skipped in advance before the bonding step.

そこで、溶剤分散型加硫接着剤と塗布して、未加硫ゴムを金属に接合する接着シートにより解決する。   Then, it solves with the adhesive sheet which apply | coats with a solvent dispersion | distribution type vulcanization adhesive, and joins an unvulcanized rubber to a metal.

これにより、接着工程前に予め、接着剤の揮発性成分を飛ばしてしまうことができる。また、容易に、接着剤の膜厚を均一するような管理をすることができる。   Thereby, the volatile component of an adhesive agent can be skipped beforehand before an adhesion process. In addition, it is possible to easily manage the adhesive to have a uniform film thickness.

図１から図３および図６を参照して、本発明の実施の形態について説明する。図１は、本発明の接着シート１を製造するための装置概略図である。上塗接着剤層および下塗接着剤層のいずれを形成する際にも、同様である。図２は、上塗接着剤層を形成する際における図１のＸ−Ｘ断面を示した図である。図３は、下塗接着剤層を形成する際における図１のＸ−Ｘ断面を示した図であって、完成状態の接着シート１を示している。図６は、接着シート１の製造工程の流れを示した作業フロー図である。   An embodiment of the present invention will be described with reference to FIGS. 1 to 3 and FIG. FIG. 1 is a schematic view of an apparatus for producing the adhesive sheet 1 of the present invention. The same applies when forming either the top coat adhesive layer or the base coat adhesive layer. FIG. 2 is a view showing a cross section taken along the line XX in FIG. 1 when the top adhesive layer is formed. FIG. 3 is a diagram showing the XX cross section of FIG. 1 when the undercoat adhesive layer is formed, and shows the adhesive sheet 1 in a completed state. FIG. 6 is a work flow diagram showing the flow of the manufacturing process of the adhesive sheet 1.

接着シート１は、金属２０と未加硫のゴム３０とを接着するためのシートである。接着シート１は、フィルム１０と、上塗接着剤層１１と、下塗接着剤層１２とを備える。   The adhesive sheet 1 is a sheet for bonding the metal 20 and the unvulcanized rubber 30. The adhesive sheet 1 includes a film 10, a top coat adhesive layer 11, and a base coat adhesive layer 12.

まず、フィルム１０の材料としては、紙のシートはもとより、ナイロン、ポリプロピレン（ＰＰ）、ポリエチレン（ＰＥ）、ポリエステル、ポリイミドなどの高分子化合物を材料とするシートを広く用いることができる。さらに、耐熱性が高い材料が好ましいので、フィルム１０の材料としては、ポリエステルやポリイミドなどの耐熱性の高い高分子化合物を材料とするフィルムが好ましい。耐熱性と材料の価格の点で、ポリエステルの中でも、ポリエチレンテレフタレート（ＰＥＴ）がフィルム１０の材料として最適である。フィルム１０は、ロール状にしてローラ５に巻きつけておくとよい。このローラ５から、フィルム１０を等速で連続的に供給する。   First, as a material of the film 10, not only a paper sheet but also a sheet made of a polymer compound such as nylon, polypropylene (PP), polyethylene (PE), polyester, polyimide, etc. can be widely used. Furthermore, since a material having high heat resistance is preferable, the material of the film 10 is preferably a film made of a polymer compound having high heat resistance such as polyester or polyimide. Among polyesters, polyethylene terephthalate (PET) is the most suitable material for the film 10 in terms of heat resistance and material cost. The film 10 is preferably rolled and wound around the roller 5. From this roller 5, the film 10 is continuously supplied at a constant speed.

このフィルム１０の一方の面上に、ゴム３０と反応性を有する「溶剤分散型加硫接着剤」を塗布する（Ｓ１０１）。たとえば、図１に示すように、ローラ５から一定の速度で供給されるフィルム１０の一方の面上に、溶剤分散型加硫接着剤を、所定の厚さで均一に塗布する。溶剤分散型加硫接着剤を、所定の厚さで均一に塗布する方法としては、さまざまな方法が考えられる。例えば、塗布ローラを用いて塗布すること、塗布装置に配置されるマイクログラビア（登録商標）ヘッドを用いてマイクルグラビアロールコート法により塗布すること、塗布装置に配置されるスロットダイヘッドを用いたスロットダイコート法をはじめ、塗布装置に配置されるリバースロールコート法や、塗布装置に配置されるナイフコート法を用いて、接着剤を転写ないし吐出する方法等が好ましい。これらの方法を取ることにより，塗膜厚さを精密に管理できる。図１には、これらの一例として、スロットダイ６により、連続的に供給されるフィルム１０の一方の面上に溶剤分散型加硫接着剤を塗布する方法を示している。最終的に形成される上塗接着剤層１１の厚さが１０ミクロンから３０ミクロンぐらいの範囲となるように、溶剤分散型加硫接着剤の塗布厚さを管理することが好ましい。図１の断面Ｘ−Ｘの箇所のフィルム１０には、図２に示すような溶剤分散型加硫接着剤の層が形成される。塗布後，揮発成分の溶剤を蒸発させるように、その接着剤を乾燥させる（Ｓ１０２）。たとえば、図１に示すように、高温の乾燥ガス７を吹き付けて、所定時間加熱する。接着剤を約１分間摂氏８０度で保持して、その後３分間から４分間摂氏１２０度で保持する。これにより、図２に示すように、フィルム１０の一方の面上に溶剤分散型加硫接着剤の上塗接着剤層１１が形成される。上塗接着剤層１１が形成されたフィルム１０をラミネートローラ９により押し付けながらローラ８に巻き取る。   A “solvent dispersion type vulcanizing adhesive” having reactivity with the rubber 30 is applied on one surface of the film 10 (S101). For example, as shown in FIG. 1, a solvent-dispersed vulcanized adhesive is uniformly applied at a predetermined thickness on one surface of a film 10 supplied from a roller 5 at a constant speed. Various methods are conceivable as a method for uniformly applying the solvent-dispersed vulcanized adhesive with a predetermined thickness. For example, coating using a coating roller, coating using a micro gravure roll coating method using a micro gravure (registered trademark) head disposed in a coating apparatus, slot die coating using a slot die head disposed in a coating apparatus A method of transferring or discharging an adhesive using a reverse roll coating method disposed in a coating apparatus or a knife coating method disposed in a coating apparatus is preferable. By adopting these methods, the coating thickness can be precisely controlled. As an example of these, FIG. 1 shows a method of applying a solvent-dispersed vulcanized adhesive on one surface of a continuously supplied film 10 using a slot die 6. It is preferable to control the coating thickness of the solvent-dispersed vulcanized adhesive so that the thickness of the finally formed top adhesive layer 11 is in the range of about 10 to 30 microns. A layer of a solvent-dispersed vulcanized adhesive as shown in FIG. 2 is formed on the film 10 at the section XX in FIG. After the application, the adhesive is dried so as to evaporate the solvent of the volatile component (S102). For example, as shown in FIG. 1, high temperature dry gas 7 is sprayed and heated for a predetermined time. The adhesive is held at 80 degrees Celsius for about 1 minute, and then held at 120 degrees Celsius for 3 to 4 minutes. Thereby, as shown in FIG. 2, the top coat adhesive layer 11 of the solvent dispersion type vulcanized adhesive is formed on one surface of the film 10. The film 10 on which the top adhesive layer 11 is formed is wound around a roller 8 while being pressed by a laminating roller 9.

フィルム１０の面上に上塗接着剤層１１が形成された後に、上塗接着剤層１１のさらに上側の面（上塗接着剤層１１の面のうち、フィルム１０と反対側の面）に下塗接着剤層１２を形成する。下塗接着剤層１２は、まず金属と反応性を有する接着剤を塗布する（Ｓ１０３）。下塗接着剤層１２の形成の仕方は、上塗接着剤層１１を形成する場合と同じである。上塗接着剤層１１が形成されたフィルム１０を、図１に示すように、上塗接着剤層１１がノズル６の側となるように、ローラ５から一定の速度でフィルム１０を連続的に供給する。連続的に供給されるフィルム１０の上塗接着剤層１１の面上にスロットダイ６により、所定の厚さで接着剤を塗布する。５ミクロンから２５ミクロンの範囲の厚さで塗布するのが好ましい。塗布厚さは、最終的に形成される下塗接着剤層１２の厚さが１０ミクロンから３０ミクロンぐらいの範囲となるように塗布することが好ましい。図１の断面Ｘ−Ｘの箇所のフィルム１０には、図３に示すような溶剤分散型加硫接着剤の層が形成される。塗布後，揮発成分の溶剤を蒸発させるように、その接着剤を乾燥させる（Ｓ１０４）。図１に示すように、高温の乾燥ガス７を吹き付けて乾燥する。その結果、図３に示すように、フィルム１０の一方の面上に溶剤分散型加硫接着剤の上塗接着剤層１１が形成され、さらにその上に下塗接着剤層１２が形成される。上塗接着剤層１１と下塗接着剤層１２とが形成されたフィルム１０をラミネートローラ９により押し付けながらローラ８に巻き取る。これにより、接着シート１が完成する。   After the overcoat adhesive layer 11 is formed on the surface of the film 10, the undercoat adhesive is applied to the upper surface of the topcoat adhesive layer 11 (the surface of the topcoat adhesive layer 11 opposite to the film 10). Layer 12 is formed. The undercoat adhesive layer 12 first applies an adhesive having reactivity with a metal (S103). The method for forming the undercoat adhesive layer 12 is the same as that for forming the topcoat adhesive layer 11. As shown in FIG. 1, the film 10 on which the top adhesive layer 11 is formed is continuously supplied from the roller 5 at a constant speed so that the top adhesive layer 11 is on the nozzle 6 side. . On the surface of the top coating adhesive layer 11 of the film 10 that is continuously supplied, an adhesive is applied with a predetermined thickness by the slot die 6. It is preferred to apply at a thickness in the range of 5 to 25 microns. The coating thickness is preferably applied so that the finally formed primer adhesive layer 12 has a thickness of about 10 to 30 microns. A layer of a solvent-dispersed vulcanized adhesive as shown in FIG. 3 is formed on the film 10 at the location of the section XX in FIG. After the application, the adhesive is dried so as to evaporate the solvent of the volatile component (S104). As shown in FIG. 1, it dries by spraying the hot dry gas 7. FIG. As a result, as shown in FIG. 3, the top coat adhesive layer 11 of the solvent-dispersed vulcanized adhesive is formed on one surface of the film 10, and the base coat adhesive layer 12 is further formed thereon. The film 10 on which the top coat adhesive layer 11 and the base coat adhesive layer 12 are formed is wound around the roller 8 while being pressed by the laminating roller 9. Thereby, the adhesive sheet 1 is completed.

なお、フィルム１０の面上に上塗接着剤層１１を形成する前に、予め、上塗接着剤層１１が形成される側のフィルム１０の面にエンボス加工を行い、または面を荒らしておくなどするとよい。空気の層がフィルム１０と上塗接着剤層１１との間に形成され、接着シート１から接着シート１が剥れやすくなる。または、上塗接着剤層１１が形成される側のフィルム１０の面に離型剤を塗布することが考えられる。   In addition, before forming the top coat adhesive layer 11 on the surface of the film 10, the surface of the film 10 on the side where the top coat adhesive layer 11 is formed is embossed or the surface is roughened. Good. An air layer is formed between the film 10 and the top adhesive layer 11, and the adhesive sheet 1 is easily peeled off from the adhesive sheet 1. Alternatively, it is conceivable to apply a release agent to the surface of the film 10 on the side where the top coat adhesive layer 11 is formed.

続いて、図４，図５および図７を参照して、接着シート１を用いて、金属２０と未加硫のゴム３０とを接着する方法について説明する。図４および図５は、接着シート１を用いて、金属２０と未加硫のゴム３０とを接着する際の工程を示した図である。図７は、接着シート１を用いて金属２０と未加硫のゴム３０とを接着する工程を示した作業フロー図である。   Next, a method for bonding the metal 20 and the unvulcanized rubber 30 using the adhesive sheet 1 will be described with reference to FIGS. 4, 5, and 7. 4 and 5 are diagrams showing a process when the metal 20 and the unvulcanized rubber 30 are bonded using the adhesive sheet 1. FIG. 7 is a work flow diagram illustrating a process of bonding the metal 20 and the unvulcanized rubber 30 using the adhesive sheet 1.

まず、図４のように、接着対象である金属２０の上に、接着シート１を押し付ける。金属２０からみれば、金属の面上に下塗接着剤層１２の面のうち、上塗接着剤層１１と反対側の面を金属２０に押し付けて固定する（Ｓ２０１）。この状態でフィルム１０上にゴムマット１４を載せて均一に加圧しながら金属２０を加熱して、金属２０に下塗接着剤層１２を転写する（Ｓ２０２）。金属２０に下塗接着剤層１２が転写されて固着した後に、図５に示すように、フィルム１０を上塗接着剤層１１から剥がして、フィルム１０を剥がした面上に接着対象の未加硫ゴム３０を載せる。その後、ゴム３０と上塗接着剤層１１とを加熱しながら加圧して該未加硫ゴムの加硫とともに該上塗接着剤層と該ゴムとを固着させる（Ｓ２０４）。   First, as shown in FIG. 4, the adhesive sheet 1 is pressed onto the metal 20 to be bonded. When viewed from the metal 20, the surface of the undercoat adhesive layer 12 opposite to the top adhesive layer 11 is pressed against the metal 20 and fixed to the metal 20 (S201). In this state, the rubber mat 14 is placed on the film 10 and the metal 20 is heated while being uniformly pressed to transfer the undercoat adhesive layer 12 to the metal 20 (S202). After the base coat adhesive layer 12 is transferred and fixed to the metal 20, as shown in FIG. 5, the film 10 is peeled off from the top coat adhesive layer 11, and the unvulcanized rubber to be bonded on the surface from which the film 10 is peeled off. 30 is loaded. Thereafter, the rubber 30 and the top coat adhesive layer 11 are pressurized while being heated, and the top coat adhesive layer and the rubber are fixed together with the vulcanization of the unvulcanized rubber (S204).

これにより、接着剤を固化させて接着シート１を形成させる過程と、それを金属２０とゴム３０と圧着さして加圧することにより、ゴム３０との加硫による接合させる過程とを分離することが可能となる。   Thereby, it is possible to separate the process of solidifying the adhesive to form the adhesive sheet 1 and the process of joining the rubber 20 by vulcanization by pressing the metal 20 and the rubber 30 against pressure. It becomes.

本発明の接着シート１を製造するための装置概略図である。It is the apparatus schematic for manufacturing the adhesive sheet 1 of this invention. 上塗接着剤層を形成する際における図１のＸ−Ｘ断面を示した図である。It is the figure which showed the XX cross section of FIG. 1 at the time of forming a top-coat adhesive bond layer. 下塗接着剤層を形成する際における図１のＸ−Ｘ断面を示した図であって、完成状態の接着シート１を示している。It is the figure which showed the XX cross section of FIG. 1 in forming an undercoat adhesive bond layer, Comprising: The adhesive sheet 1 of the completion state is shown. 接着シート１を用いて、金属２０と未加硫のゴム３０とを接着する際の工程（フィルム剥離前）を示した図である。It is the figure which showed the process (before film peeling) at the time of adhere | attaching the metal 20 and the unvulcanized rubber 30 using the adhesive sheet. 接着シート１を用いて、金属２０と未加硫のゴム３０とを接着する際の工程（フィルム剥離後）を示した図である。It is the figure which showed the process (after film peeling) at the time of adhere | attaching the metal 20 and the unvulcanized rubber 30 using the adhesive sheet 1. FIG. 接着シート１の製造工程の流れを示した作業フロー図である。It is the work flow figure which showed the flow of the manufacturing process of the adhesive sheet. 接着シート１を用いて金属２０と未加硫のゴム３０とを接着する工程を示した作業フロー図である。FIG. 4 is a work flow diagram illustrating a process of bonding the metal 20 and the unvulcanized rubber 30 using the adhesive sheet 1.

符号の説明Explanation of symbols

１ 接着シート
５，８ ローラ
９ ラミネートローラ
１０ フィルム
１１ 上塗接着剤層
１２ 下塗接着剤層 DESCRIPTION OF SYMBOLS 1 Adhesive sheet 5,8 Roller 9 Laminating roller 10 Film 11 Top coat adhesive layer 12 Base coat adhesive layer

Claims (6)

未加硫ゴムを金属に接合する接着シートであって、
高分子化合物からなるフィルムと、
該フィルムの一方の面上に該ゴムと反応性を有する溶剤分散型加硫接着剤の塗布を行って乾燥させた上塗接着剤層と、
該上塗接着剤層の乾燥後に、該上塗接着剤層の該フィルムと反対側の面上に該金属と反応性を有する接着剤の塗布を行って乾燥させた下塗接着剤層とを備えることを特徴とする接着シート。 An adhesive sheet for joining unvulcanized rubber to metal,
A film made of a polymer compound;
A top-coat adhesive layer applied on one side of the film and dried by applying a solvent-dispersed vulcanized adhesive having reactivity with the rubber;
After drying the topcoat adhesive layer, a basecoat adhesive layer dried by applying an adhesive having reactivity with the metal on the surface of the topcoat adhesive layer opposite to the film is provided. Features an adhesive sheet. 請求項１に記載の接着シートであって、該接着シートは、該金属を下側にした状態で、その上面に該下層接着剤層の該上塗接着剤層と反対側の面を該金属に押し付けて固定し、この状態で該フィルム上にゴムマットを載せて均一に加圧しながら金属を加熱し、金属に下塗接着剤層が固着した後に、該フィルムを該上塗接着剤層から剥がし、該フィルムを剥がした面上に該未加硫ゴムを加熱しながら加圧して該未加硫ゴムの加硫とともに該上塗接着剤層と該ゴムとを固着させることを特徴とする接着シート。   2. The adhesive sheet according to claim 1, wherein the adhesive sheet has, on the upper surface, the surface of the lower adhesive layer opposite to the top adhesive layer on the metal with the metal facing down. In this state, the rubber mat is placed on the film, and the metal is heated while being uniformly pressed. After the base adhesive layer is fixed to the metal, the film is peeled off from the top adhesive layer, and the film is removed. An adhesive sheet, wherein the unvulcanized rubber is pressurized while being heated on the surface from which the uncoated rubber has been peeled off, and the uncoated rubber is vulcanized together with the overcoat adhesive layer and the rubber. 請求項１に記載の接着シートであって、
前記溶剤分散型加硫接着剤の塗布は、塗布装置に配置される塗布ヘッドから該溶剤分散型加硫接着剤を、連続的に供給される該フィルム上に吐出することにより行い、
前記金属と反応性を有する接着剤の塗布は、該フィルム上に塗布された該溶剤分散型加硫接着剤を所定時間加熱した後に、塗布装置に配置される塗布ヘッドから前記金属と反応性を有する接着剤を、連続的に供給される該フィルム上に形成された該上塗接着剤層の上に吐出することにより行うことを特徴とする接着シート。 The adhesive sheet according to claim 1,
Application of the solvent-dispersed vulcanized adhesive is performed by discharging the solvent-dispersed vulcanized adhesive from a coating head disposed in a coating apparatus onto the continuously supplied film.
The adhesive having reactivity with the metal is applied by reacting with the metal from a coating head disposed in a coating apparatus after heating the solvent-dispersed vulcanized adhesive coated on the film for a predetermined time. An adhesive sheet, wherein the adhesive sheet is discharged by discharging the adhesive on the top-coated adhesive layer formed on the continuously supplied film. 請求項１から３に記載の接着シートであって、該上塗接着剤層を形成する側の該フィルムの面が予め荒らされていることを特徴とする接着シート。   4. The adhesive sheet according to claim 1, wherein the surface of the film on the side on which the top coat adhesive layer is formed is roughened in advance. 請求項１から３に記載の接着シートであって、該上塗接着剤層の厚さは２０ミクロンから３０ミクロンの範囲であって、該下塗接着剤層の厚さは５ミクロンから２５ミクロンの範囲であることを特徴とする接着シート。   4. The adhesive sheet according to claim 1, wherein the thickness of the overcoat adhesive layer is in the range of 20 microns to 30 microns, and the thickness of the primer adhesive layer is in the range of 5 microns to 25 microns. An adhesive sheet, characterized in that 未加硫ゴムと金属とを接着シートによる接合する方法であって、
該接着シートは、
高分子化合物からなるフィルムと、
該フィルムの一方の面上に該ゴムと反応性を有する溶剤分散型加硫接着剤を塗布して乾燥させた上塗接着剤層と、
該上塗接着剤層の乾燥後に、該上塗接着剤層の該フィルムと反対側の面上に該金属と反応性を有する接着剤を塗布して乾燥させた下塗接着剤層とを備え、
該接着方法は、
該金属を下側にした状態で、該金属の上面に、該接着シートの該下層接着剤層の該上塗接着剤層と反対側の面を該金属に押し付けて固定する工程と、
該フィルム上にゴムマットを載せて均一に加圧しながら金属を加熱する工程と、
該金属に下塗接着剤層が固着した後に、該フィルムを該上塗接着剤層から剥がす工程と、
該フィルムを剥がした面上に該未加硫ゴムを加熱しながら加圧して該未加硫ゴムの加硫とともに該上塗接着剤層と該ゴムとを固着させる工程とを備えることを特徴とする接着方法。 A method of joining unvulcanized rubber and metal with an adhesive sheet,
The adhesive sheet is
A film made of a polymer compound;
A top adhesive layer coated with a solvent-dispersed vulcanized adhesive having reactivity with the rubber on one side of the film and dried;
An undercoat adhesive layer obtained by applying an adhesive having reactivity with the metal on the surface opposite to the film of the overcoat adhesive layer after drying the overcoat adhesive layer;
The bonding method is:
Pressing the surface of the lower adhesive layer of the adhesive sheet opposite to the top adhesive layer to the metal, with the metal facing down, and fixing the metal sheet to the upper surface of the adhesive sheet;
Heating the metal while placing a rubber mat on the film and applying uniform pressure;
Peeling the film from the topcoat adhesive layer after the basecoat adhesive layer is secured to the metal;
And a step of fixing the uncoated rubber layer and the rubber together with vulcanization of the unvulcanized rubber by applying pressure while heating the unvulcanized rubber on the surface from which the film has been peeled off. Bonding method.
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