JP2006225531A - Film adhesive tape - Google Patents

Film adhesive tape Download PDF

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Publication number
JP2006225531A
JP2006225531A JP2005041613A JP2005041613A JP2006225531A JP 2006225531 A JP2006225531 A JP 2006225531A JP 2005041613 A JP2005041613 A JP 2005041613A JP 2005041613 A JP2005041613 A JP 2005041613A JP 2006225531 A JP2006225531 A JP 2006225531A
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JP
Japan
Prior art keywords
film
visible light
light transmittance
adhesive tape
tackifier
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JP2005041613A
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Japanese (ja)
Inventor
Akiyoshi Masuda
晃良 増田
Yugo Matsuura
雄午 松浦
Minoru Nishimura
稔 西村
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SUGAWARA IND
Maxell Sliontec Ltd
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SUGAWARA IND
Maxell Sliontec Ltd
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Priority to JP2005041613A priority Critical patent/JP2006225531A/en
Priority to PCT/JP2006/303518 priority patent/WO2006088255A1/en
Publication of JP2006225531A publication Critical patent/JP2006225531A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/04—Homopolymers or copolymers of esters
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
    • C08L2666/02—Organic macromolecular compounds, natural resins, waxes or and bituminous materials
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2427/00—Presence of halogenated polymer
    • C09J2427/006—Presence of halogenated polymer in the substrate

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Adhesive Tapes (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a film adhesive tape capable of being suitably used for fixing the circuits of an outdoor water type sun system, air type sun system and solar cells, having a high visible light transmittance, and excellent in weather resistance and waterproof property. <P>SOLUTION: This film adhesive tape is provided by coating an acrylic adhesive having ≥70% visible light transmittance on a fluorine-based tape substrate having ≥90% visible light transmittance. In this case, the acrylic adhesive contains no tackifier, or at least 1 kind of tackifier among a hydrogenated rosin resin tackifier, an aliphatic completely saturated hydrocarbon resin tackifier and a hydrogenated terpene resin tackifier. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、例えば、水式太陽システムパネル、空気式太陽システムパネル、太陽電池パネル、天窓、及び太陽光が透過するプラスチック材表面に配線を固定、補修及び飛散防止するために使用するフィルム粘着テープに関するものである。   The present invention is, for example, a water-based solar system panel, a pneumatic solar system panel, a solar cell panel, a skylight, and a film adhesive tape used for fixing, repairing and preventing scattering of wiring on the surface of a plastic material through which sunlight passes. It is about.

従来より、水式太陽システムパネル、空気式太陽システムパネル、太陽電池パネル、天窓及び太陽光が透過するプラスチック材表面に配線を固定、補修及び飛散防止するためには、太陽光は透過しないが、耐候性のあるアルミ粘着テープ、または、耐候性は低いが、太陽光透過率(以下、可視光透過率という)の高いポリエステルフィルムやポリプロピレンフィルムを基材としたフィルム粘着テープが使用されてきた。しかし、このポリエステルフィルムやポリプロピレンフィルムを基材としたフィルム粘着テープは、太陽光を照射されることにより、ポリエステルフィルムやポリプロピレンフィルム中の可塑剤が劣化し、黄変することに起因するものと、粘着剤中の粘着付与剤が紫外線を照射されることにより劣化し、黄変することに起因するものの、一方又は両方により、経時的に可視光透過率が低下する。上記粘着剤中の粘着付与剤の紫外線劣化に対し、劣化抑制を目的として、紫外線吸収剤（老化防止剤）等を添加する方法もあるが、劣化防止剤を添加することにより、結果的に、可視光透過率が低くなるため、好ましくない。   Conventionally, in order to fix, repair, and prevent scattering of the water solar system panel, pneumatic solar system panel, solar panel, skylight and plastic material surface through which sunlight passes, sunlight does not pass, A weather-resistant aluminum pressure-sensitive adhesive tape or a film pressure-sensitive adhesive tape based on a polyester film or a polypropylene film having a low sunlight resistance but a high sunlight transmittance (hereinafter referred to as visible light transmittance) has been used. However, the film adhesive tape based on this polyester film or polypropylene film is caused by the fact that the plasticizer in the polyester film or polypropylene film deteriorates and yellows when irradiated with sunlight, Although the tackifier in the pressure-sensitive adhesive deteriorates when it is irradiated with ultraviolet rays and is yellowed, the visible light transmittance decreases with time due to one or both. There is also a method of adding an ultraviolet absorber (anti-aging agent) or the like for the purpose of suppressing deterioration against ultraviolet deterioration of the tackifier in the above-mentioned adhesive, but as a result, by adding a deterioration inhibitor, Since the visible light transmittance is lowered, it is not preferable.

太陽電池パネルは、水式太陽システムパネル、空気式太陽システムパネルに比べ、可視光透過率の影響が大きいこと、償却年数が２０年と長く、従来のポリエステルフィルムやポリプロピレンフィルムを基材としたフィルム粘着テープでは、満足する特性を得るに至っていない。   Solar cell panels are more affected by visible light transmittance than water solar system panels and pneumatic solar system panels, and have a long depreciation period of 20 years. Films based on conventional polyester and polypropylene films Adhesive tape has not yet achieved satisfactory characteristics.

また、耐候性を有するフィルムとしては、ポリイミドフィルム、フッ素系フィルム等が知られている。ポリイミドフィルムは、オレンジ色で、かつ、可視光透過率が２０％以下であることから、本用途には不適である。一方、フッ素系フィルムは、透明のものから白色のものまであり、かつ、可視光透過率が０〜９８％
の範囲のものがある。 Moreover, a polyimide film, a fluorine-type film, etc. are known as a film which has a weather resistance. Since the polyimide film is orange and has a visible light transmittance of 20% or less, it is not suitable for this application. On the other hand, the fluorine-based film ranges from transparent to white and has a visible light transmittance of 0 to 98%.
There are things in the range.

また、フッ素系フィルム基材に粘着剤層を施したフィルム粘着テープとしては、基材の等方性を特徴としたもの（特許文献１）、フッ素フィルムに粘着剤を間隔塗工したもの（特許文献２）、フッ素フィルム表面に有機珪素化合物をプラズマ重合により成膜したもの（特許文献３）、フッ素フィルム粘着テープの背面剥離力を小さくしたもの（特許文献４）がある。   In addition, as a film adhesive tape in which a pressure-sensitive adhesive layer is applied to a fluorine-based film substrate, the film is characterized by the isotropic property of the substrate (Patent Document 1), and is a film in which a pressure-sensitive adhesive is applied to a fluorine film (patent) Document 2), a film formed by plasma polymerization of an organosilicon compound on the surface of a fluorine film (Patent Document 3), and a film having a reduced back peeling force of a fluorine film adhesive tape (Patent Document 4).

特開平８−２５３７４０号公報JP-A-8-253740 特開平７−２９２３３２号公報JP 7-292332 A 特開平６−２００２１７号公報Japanese Patent Laid-Open No. 6-200217 特開平７−１９６９９１号公報JP 7-196991 A

しかし、特許文献１〜４に記載のフィルム粘着テープは、耐候性、特に、ウェザー試験後のフッ素系フィルム粘着テープの可視光透過率について規定したものはない。   However, the film adhesive tapes described in Patent Documents 1 to 4 do not define weather resistance, particularly the visible light transmittance of the fluorine-based film adhesive tape after the weather test.

本発明の目的は、上記課題を解決するためになされたものであり、屋外の水式太陽システム、空気式太陽システム及び太陽電池の配線固定用に好適に用いることができる、可視光透過率が高く、耐候性、耐水性に優れたフィルム粘着テープを提供しようとするものである。   An object of the present invention is to solve the above-described problems, and has a visible light transmittance that can be suitably used for fixing a wiring of an outdoor water solar system, a pneumatic solar system, and a solar cell. An object of the present invention is to provide a film adhesive tape that is high and has excellent weather resistance and water resistance.

本発明の目的を達成するために、本発明は特許請求の範囲に記載のような構成とするものである。   In order to achieve the object of the present invention, the present invention is configured as described in the claims.

すなわち、本発明は、フッ素系テープ基材上にアクリル系粘着剤が塗工されたフィルム粘着テープであって、ウェザー試験５００時間後の可視光透過率を６５％以上とする。   That is, the present invention is a film pressure-sensitive adhesive tape in which an acrylic pressure-sensitive adhesive is coated on a fluorine-based tape substrate, and has a visible light transmittance of 65% or more after 500 hours of a weather test.

この場合、本発明は、上記フッ素系テープ基材の可視光透過率を９０％以上、かつ、上記アクリル系粘着剤の可視光透過率を７０％以上とする。   In this case, according to the present invention, the visible light transmittance of the fluorine-based tape base material is 90% or more, and the visible light transmittance of the acrylic pressure-sensitive adhesive is 70% or more.

また、これらの場合、上記アクリル系粘着剤は、粘着付与剤を含有しない。   In these cases, the acrylic pressure-sensitive adhesive does not contain a tackifier.

また、これらの場合、上記アクリル系粘着剤は、水素化ロジン樹脂粘着付与剤、または、脂肪族完全飽和炭化水素樹脂粘着付与剤、または、水素化テルペン樹脂粘着付与剤のうちの少なくとも１種類の粘着付与剤を含有する。   In these cases, the acrylic pressure-sensitive adhesive is at least one of a hydrogenated rosin resin tackifier, an aliphatic fully saturated hydrocarbon resin tackifier, or a hydrogenated terpene resin tackifier. Contains a tackifier.

また、これらの場合、上記フッ素系テープ基材の厚さを１２〜１２５μｍ、かつ、フィルム粘着テープの総厚さを３０〜５００μｍとする。   Moreover, in these cases, the thickness of the said fluorine-type tape base material shall be 12-125 micrometers, and the total thickness of a film adhesive tape shall be 30-500 micrometers.

以上、説明したように、本発明は、フッ素系テープ基材上にアクリル系粘着剤が塗工されたフィルム粘着テープであって、ウェザー試験５００時間後の可視光透過率が６５％以上であるから、耐候性、耐水性、可視光透過性に優れている。   As described above, the present invention is a film pressure-sensitive adhesive tape in which an acrylic pressure-sensitive adhesive is coated on a fluorine-based tape substrate, and has a visible light transmittance of 65% or more after 500 hours of a weather test. Therefore, it is excellent in weather resistance, water resistance and visible light transmission.

また、この場合、上記フッ素系テープ基材の可視光透過率が９０％以上であり、かつ、上記アクリル系粘着剤の可視光透過率が７０％以上であるから、可視光透過性に優れている。   In this case, since the visible light transmittance of the fluorine-based tape base material is 90% or more and the visible light transmittance of the acrylic pressure-sensitive adhesive is 70% or more, the visible light transmittance is excellent. Yes.

また、これらの場合、上記アクリル系粘着剤は、粘着付与剤を含有しないから、耐候性に優れている。   In these cases, the acrylic pressure-sensitive adhesive does not contain a tackifier, and thus has excellent weather resistance.

また、これらの場合、上記アクリル系粘着剤は、水素化ロジン樹脂粘着付与剤、または、脂肪族完全飽和炭化水素樹脂粘着付与剤、または、水素化テルペン樹脂粘着付与剤のうちの少なくとも１種類の粘着付与剤を含有するから、耐候性に優れている。   In these cases, the acrylic pressure-sensitive adhesive is at least one of a hydrogenated rosin resin tackifier, an aliphatic fully saturated hydrocarbon resin tackifier, or a hydrogenated terpene resin tackifier. Since it contains a tackifier, it has excellent weather resistance.

また、これらの場合、上記フッ素系テープ基材の厚さが１２〜１２５μｍ、かつ、フィルム粘着テープの総厚さが３０〜５００μｍであるから、可視光透過性及び粘着性に優れている。   In these cases, since the thickness of the fluorine-based tape substrate is 12 to 125 μm and the total thickness of the film adhesive tape is 30 to 500 μm, the visible light permeability and the adhesiveness are excellent.

本発明者らは、可視光（399-800nm）透過率の初期値が９０％以上あるフッ素系テープ基材上に、可視光（399-800nm）透過率の初期値が７０％以上あるアクリル系粘着剤が塗工されたフィルム粘着テープが、ウェザー試験５００時間後の可視光（399-800nm）透過率の最小値が６５％以上であることを見出し、本発明に至ったものである。   The inventors of the present invention have provided an acrylic system having an initial value of visible light (399-800 nm) transmittance of 70% or more on a fluorine-based tape substrate having an initial value of visible light (399-800 nm) transmittance of 90% or more. The film pressure-sensitive adhesive tape coated with the pressure-sensitive adhesive has been found to have a minimum value of visible light (399-800 nm) transmittance of 65% or more after 500 hours of the weather test, and has led to the present invention.

この場合、上記アクリル系粘着剤は粘着付与剤を含有しないので、本発明のフィルム粘着テープは、耐候性が優れていることが分かった。また、上記アクリル系粘着剤が、水素化ロジン樹脂粘着付与剤、または、脂肪族完全飽和炭化水素樹脂粘着付与剤、または、水素化テルペン樹脂粘着付与剤のうちの少なくとも１種類の粘着付与剤を含有する場合にも、耐候性に優れることを見出した。   In this case, since the said acrylic adhesive did not contain a tackifier, it turned out that the film adhesive tape of this invention is excellent in weather resistance. The acrylic pressure-sensitive adhesive is a hydrogenated rosin resin tackifier, an aliphatic fully saturated hydrocarbon resin tackifier, or a hydrogenated terpene resin tackifier. Also when it contained, it discovered that it was excellent in a weather resistance.

ここで使用されるフッ素系テープ基材は、フッ素を有する高分子量体であって、具体的には、ポリビニルフルオライド（ＰＶＦ）、ポリテトラフルオロエチレン（ＰＴＦＥ）、テトラフルオロエチレン−パーフルオロアルキルビニルエーテル共重合体（ＰＦＡ）、テトラフルオロエチレン−ヘキサフルオロプロピレン共重合体（ＦＥＰ）、テトラフルオロエチレン−エチレン共重合体（ＥＴＦＥ）、ポリクロロトリフルオロエチレン（ＰＣＴＦＥ）、ポリビニリデンフルオライド（ＰＶＤＦ）などが挙げられる。基材厚は１２〜１２５μｍのものであり、フィルム表面は可視光透過率を低下させることなく、アクリル系粘着剤に対する易接着処理が可能なコロナ放電処理、プラズマ処理等を施したものである。   The fluorine-based tape base material used here is a high molecular weight substance having fluorine, and specifically, polyvinyl fluoride (PVF), polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoroalkyl vinyl ether. Copolymer (PFA), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), tetrafluoroethylene-ethylene copolymer (ETFE), polychlorotrifluoroethylene (PCTFE), polyvinylidene fluoride (PVDF), etc. Is mentioned. The substrate thickness is 12 to 125 μm, and the film surface is subjected to corona discharge treatment, plasma treatment, etc. that can be easily adhered to an acrylic pressure-sensitive adhesive without reducing visible light transmittance.

一般に、フッ素系フィルムは、厚さが薄いものほど、可視光透過率が高く、厚さが１２〜１２５μｍでは、可視光透過率は９０％以上で、かつ、耐候性に優れる特徴を有している。   In general, the thinner the fluorine-based film, the higher the visible light transmittance. When the thickness is 12 to 125 μm, the visible light transmittance is 90% or more, and the weather resistance is excellent. Yes.

本発明で使用されるアクリル系粘着剤は、可視光透過率が７０％以上で、かつ、（メタ）アクリル酸アルキルエステル単量体と極性基含有単量体との共重合体と架橋剤からなり、粘着剤中の溶剤（例えば、トルエン、酢酸エチル、キシレン等）または水を乾燥、もしくは粘着剤中の（メタ）アクリル酸アルキルエステル単量体、極性基含有単量体及び多官能アクリレートに光重合開始剤（例えば、イルガキュア１８４、イルガキュア６５１、イルガキュア３６９、イルガキュア１８００（チバ・スペシャリティ・ケミカルズ社）、Chivacure TPO、Chivacure １０７、Chivacure １７３、Chivacure １２５６（チャイテック社）等）を添加し、紫外線（ＵＶ）重合させ、粘着テープとする。（メタ）アクリル酸アルキルエステル単量体と極性基含有単量体との共重合体とは、例えば、アクリル酸２−エチルヘキシルとアクリル酸との共重合体、アクリル酸イソオクチルとメタクリル酸２−ヒドロキシエチルとの共重合体、アクリル酸ブチルとアクリル酸とメタクリル酸２−ヒドロキシエチルとの三元共重合体等が使用されるが、特に、これらに限定されるものではない。   The acrylic pressure-sensitive adhesive used in the present invention has a visible light transmittance of 70% or more, and is composed of a copolymer of a (meth) acrylic acid alkyl ester monomer and a polar group-containing monomer, and a crosslinking agent. The solvent in the adhesive (eg, toluene, ethyl acetate, xylene, etc.) or water is dried, or the (meth) acrylic acid alkyl ester monomer, polar group-containing monomer and polyfunctional acrylate in the adhesive Add photopolymerization initiator (for example, Irgacure 184, Irgacure 651, Irgacure 369, Irgacure 1800 (Ciba Specialty Chemicals), Chivacure TPO, Chivacure 107, Chivacure 173, Chivacure 1256 (Chaitech), etc.) (UV) is polymerized to form an adhesive tape. Examples of the copolymer of the (meth) acrylic acid alkyl ester monomer and the polar group-containing monomer include, for example, a copolymer of 2-ethylhexyl acrylate and acrylic acid, isooctyl acrylate and 2-hydroxy methacrylate. A copolymer with ethyl, a terpolymer of butyl acrylate, acrylic acid and 2-hydroxyethyl methacrylate, and the like are used, but not particularly limited thereto.

上記した（メタ）アクリル酸アルキルエステル単量体としては、例えば、エチル基、プロピル基、ブチル基、ペンチル基、イソボルニル基、ヘキシル基、２−エチルヘキシル基、オクチル基、イソオクチル基、ノニル基、イソノニル基、デシル基などで代表される、通常、炭素数が２０以下のアルキル基を有する（メタ）アクリル酸のエステル等が挙げられる。なお、上記した（メタ）アクリル酸アルキルエステルは、単独もしくは２種以上で使用される。   Examples of the (meth) acrylic acid alkyl ester monomer include, for example, ethyl group, propyl group, butyl group, pentyl group, isobornyl group, hexyl group, 2-ethylhexyl group, octyl group, isooctyl group, nonyl group, and isononyl. (Meth) acrylic acid ester having an alkyl group having 20 or less carbon atoms, typically represented by a group, decyl group, and the like. The above (meth) acrylic acid alkyl esters are used alone or in combination of two or more.

また、上記した極性基含有単量体としては、アクリル酸、メタクリル酸、イタコン酸、メタクリル酸２−ヒドロキシエチル、メタクリル酸２−ヒドロキシプロピル、アクリル酸ジメチルアミノエチル、アクリロニトリル、アクリル酸−β−カルボキシエチル（β−ＣＥＡ）、メタクリロニトリル、Ｎ−ビニル−２−ピロリドン等で代表される、分子中にカルボキシル基、水酸基、アミノ基等の極性基を有する重合性不飽和単量体等が挙げられる。   Examples of the polar group-containing monomer include acrylic acid, methacrylic acid, itaconic acid, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, dimethylaminoethyl acrylate, acrylonitrile, and acrylic acid-β-carboxyl. Examples include ethylenic (β-CEA), methacrylonitrile, N-vinyl-2-pyrrolidone and the like, and polymerizable unsaturated monomers having polar groups such as carboxyl, hydroxyl and amino groups in the molecule. It is done.

上記した架橋剤とは、例えば、分子中にイソシアネート基（ポリイソシアネート）、エポキシ基（エポキシ樹脂）等の官能基を２個以上持つもの、または、１、６−ヘキサンジオールジアクリレート、トリエチレングリコールジアクリレートなどの多官能アクリレート、または、金属キレート化合物が使用されるが、特にこれらに限定されるものではない。   Examples of the crosslinking agent include those having two or more functional groups such as isocyanate group (polyisocyanate) and epoxy group (epoxy resin) in the molecule, or 1,6-hexanediol diacrylate, triethylene glycol. A polyfunctional acrylate such as diacrylate or a metal chelate compound is used, but is not particularly limited thereto.

また、本発明では、基本的に、アクリル系粘着剤には粘着付与剤を添加しないが、粘着付与剤を添加する場合には、紫外線劣化しない粘着付与剤が添加される。即ち、使用される粘着付与剤は、耐候性の高い水素化ロジン樹脂（完全水素化ロジン樹脂）、脂肪族完全飽和炭化水素樹脂、水素化テルペン樹脂（完全水素化テルペン樹脂）であって、具体的には、荒川化学工業製のパインクリスタルＫＥ−１００、パインクリスタルＫＥ−３１１、パインクリスタルＫＥ−３５９、パインクリスタルＫＥ−６０４、同じく荒川化学工業製のアルコンＰ−７０、アルコンＰ−１００、アルコンＰ−１１５、アルコンＰ−１２５、アルコンＰ−１４０、ヤスハラケミカル製のクリアロンＰ−８５、クリアロンＰ−１０５、クリアロンＰ−１１５、クリアロンＰ−１２５、クリアロンＭ−１０５、クリアロンＫ−１００、クリアロンＫ−１１０等が使用されるが、特に、これらに限定されるものではない。   In the present invention, basically, no tackifier is added to the acrylic pressure-sensitive adhesive. However, when a tackifier is added, a tackifier that does not deteriorate with ultraviolet rays is added. That is, the tackifier used is a highly weatherable hydrogenated rosin resin (fully hydrogenated rosin resin), an aliphatic fully saturated hydrocarbon resin, or a hydrogenated terpene resin (fully hydrogenated terpene resin). Specifically, Pine Crystal KE-100, Pine Crystal KE-311, Pine Crystal KE-359, Pine Crystal KE-604 from Arakawa Chemical Industries, Archon P-70, Archon P-100, Archon from Arakawa Chemical Industries, Ltd. P-115, Alcon P-125, Alcon P-140, Clearon P-85, Clearon P-105, Clearon P-115, Clearon P-125, Clearon M-105, Clearon K-100, Clearon K- from Yashara Chemical 110 or the like is used, but is not particularly limited thereto.

本発明のフィルム粘着テープは、可視光透過率が５０％以上、好ましくは、６５％以上であることが望ましい。この可視光透過率が５０％未満では、太陽光が水式太陽システムパネル、空気式太陽システムパネル及び太陽電池パネル表面に届かないため、効果が低く、好ましくない。   The film pressure-sensitive adhesive tape of the present invention has a visible light transmittance of 50% or more, preferably 65% or more. If the visible light transmittance is less than 50%, the sunlight does not reach the surfaces of the water solar system panel, the pneumatic solar system panel, and the solar cell panel.

また、本発明のフィルム粘着テープのフッ素系テープ基材は、１２μｍ以上、１２５μｍ以下が好ましく、粘着剤層の厚さは１０μｍ以上、好ましくは、５０μｍ以上であることが望ましい。   The fluorine-based tape substrate of the film adhesive tape of the present invention preferably has a thickness of 12 μm or more and 125 μm or less, and the thickness of the pressure-sensitive adhesive layer is 10 μm or more, preferably 50 μm or more.

粘着剤の塗工厚が１０μｍ未満では、太陽光が水式太陽システムパネル、空気式太陽システムパネル及び太陽電池パネル表面等表面の固定力が得られず好ましくない。   When the coating thickness of the pressure-sensitive adhesive is less than 10 μm, it is not preferable because sunlight cannot obtain a fixing force on the surface of a water solar system panel, a pneumatic solar system panel, or a solar cell panel.

本発明のフィルム粘着テープは、その用途が太陽光エネルギーを透過し、かつ、耐候性を要求される限り、特に、限定されないが、特に、屋外の水式太陽システムパネル、空気式太陽システムパネル及び太陽電池パネル表面の配線固定用に好適に用いられ、パネルに配線を固定する。   The film adhesive tape of the present invention is not particularly limited as long as its use is transparent to solar energy and weather resistance is required, and in particular, an outdoor water solar system panel, a pneumatic solar system panel, and It is suitably used for fixing the wiring on the surface of the solar cell panel, and the wiring is fixed to the panel.

本発明のフィルム粘着テープのテープ構成について、実施例によって具体的に説明する。但し、本発明のフィルム粘着テープ及びそのテープ構成はこれに限定されるものではない。なお、本発明の実施例の記述中における「部」は、重量部を表し、「可視光透過率」の値は、399〜800nmの可視光領域において測定した透過率の最小値を表す。   The tape structure of the film adhesive tape of the present invention will be specifically described with reference to examples. However, the film adhesive tape of this invention and its tape structure are not limited to this. In the description of the examples of the present invention, “part” represents part by weight, and the value of “visible light transmittance” represents the minimum value of transmittance measured in the visible light region of 399 to 800 nm.

［実施例１］
アクリル酸２部、アクリル酸ブチル９８部の粘着剤組成に架橋剤の金属キレート２．５部を添加し、均一に混合して得た可視光透過率８６％の粘着剤を可視光透過率９８％のＥＴＦＥフィルム（１２μｍ厚）に総厚で３０μｍになるように塗布してフィルム粘着テープを得た。このフィルム粘着テープは、表１に示すとおり、可視光透過率の初期値は高かった。また、ウェザー試験５００時間後の可視光透過率と粘着力は著しい低下が認められなかった。 [Example 1]
A pressure-sensitive adhesive having a visible light transmittance of 86% obtained by adding 2.5 parts of a metal chelate as a crosslinking agent to a pressure-sensitive adhesive composition of 2 parts of acrylic acid and 98 parts of butyl acrylate was mixed uniformly. % ETFE film (12 μm thick) was applied to a total thickness of 30 μm to obtain a film adhesive tape. As shown in Table 1, this film adhesive tape had a high initial value of visible light transmittance. Further, the visible light transmittance and the adhesive strength after 500 hours of the weather test were not significantly reduced.

［実施例２］
アクリル酸７部、アクリル酸−２−エチルヘキシル９０部、アクリル酸−β−カルボキシエチル（β−ＣＥＡ）３部の粘着剤組成に架橋剤の多官能アクリレート０．１８部を添加し、均一に混合して得た可視光透過率９０％の粘着剤を可視光透過率９８％のＥＴＦＥフィルム（５０μｍ厚）に総厚で１５０μｍになるように塗布してフィルム粘着テープを得た。このフィルム粘着テープは、表１に示すとおり、可視光透過率の初期値は高かった。また、ウェザー試験５００時間後の可視光透過率と粘着力は著しい低下が認められなかった。 [Example 2]
Add 0.18 parts of a polyfunctional acrylate as a cross-linking agent to an adhesive composition of 7 parts acrylic acid, 90 parts acrylic acid-2-ethylhexyl, and 3 parts acrylic acid-β-carboxyethyl (β-CEA) and mix evenly. The adhesive having a visible light transmittance of 90% was applied to an ETFE film (50 μm thickness) having a visible light transmittance of 98% so as to have a total thickness of 150 μm to obtain a film adhesive tape. As shown in Table 1, this film adhesive tape had a high initial value of visible light transmittance. Further, the visible light transmittance and the adhesive strength after 500 hours of the weather test were not significantly reduced.

［実施例３］
アクリル酸５部、アクリル酸ブチル１０部、アクリル酸−２−エチルヘキシル８５部の粘着剤組成に架橋剤のエポキシ樹脂２部を添加し、均一に混合して得た可視光透過率９０％の粘着剤を可視光透過率９７％のＰＶＦフィルム（２５μｍ厚）に総厚で１２５μｍになるように塗布してフィルム粘着テープを得た。このフィルム粘着テープは、表１に示すとおり、可視光透過率の初期値は高かった。また、ウェザー試験５００時間後の可視光透過率と粘着力は著しい低下が認められなかった。 [Example 3]
Adhesive with 90% visible light transmittance obtained by adding 2 parts of an epoxy resin as a crosslinking agent to an adhesive composition of 5 parts of acrylic acid, 10 parts of butyl acrylate, and 85 parts of 2-ethylhexyl acrylate, and mixing them uniformly. The agent was applied to a PVF film having a visible light transmittance of 97% (25 μm thickness) to a total thickness of 125 μm to obtain a film adhesive tape. As shown in Table 1, this film adhesive tape had a high initial value of visible light transmittance. Further, the visible light transmittance and the adhesive strength after 500 hours of the weather test were not significantly reduced.

［実施例４］
アクリル酸１０部、アクリル酸−２−エチルヘキシル９０部の粘着剤組成に架橋剤の多官能アクリレート０．２０部を添加し、均一に混合して得た可視光透過率８５％の粘着剤を可視光透過率９８％のＥＴＦＥフィルム（５０μｍ厚）に総厚で１５０μｍになるように塗布してフィルム粘着テープを得た。このフィルム粘着テープは、表１に示すとおり、可視光透過率の初期値は高かった。また、ウェザー試験５００時間後の可視光透過率と粘着力は著しい低下が認められなかった。 [Example 4]
A pressure-sensitive adhesive having a visible light transmittance of 85% obtained by adding 0.20 part of a polyfunctional acrylate as a crosslinking agent to a pressure-sensitive adhesive composition of 10 parts of acrylic acid and 90 parts of 2-ethylhexyl acrylate is visible. The film was applied to an ETFE film (thickness: 50 μm) having a light transmittance of 98% so as to have a total thickness of 150 μm to obtain a film adhesive tape. As shown in Table 1, this film adhesive tape had a high initial value of visible light transmittance. Further, the visible light transmittance and the adhesive strength after 500 hours of the weather test were not significantly reduced.

［実施例５］
アクリル酸２部、アクリル酸ブチル９５部、アクリル酸−２−ヒドロキシエチル３部の粘着剤組成に架橋剤のポリイソシアネート１．５部を添加し、均一に混合して得た可視光透過率８１％の粘着剤を可視光透過率９６％のＰＶＦフィルム（５０μｍ厚）に総厚で２００μｍになるように塗布してフィルム粘着テープを得た。このフィルム粘着テープは、表１に示すとおり、可視光透過率の初期値は高かった。また、ウェザー試験５００時間後の可視光透過率と粘着力は著しい低下が認められなかった。 [Example 5]
Visible light transmittance 81 obtained by adding 1.5 parts of polyisocyanate as a crosslinking agent to an adhesive composition of 2 parts of acrylic acid, 95 parts of butyl acrylate, and 3 parts of 2-hydroxyethyl acrylate and mixing them uniformly. % Adhesive was applied to a PVF film (50 μm thickness) with a visible light transmittance of 96% to a total thickness of 200 μm to obtain a film adhesive tape. As shown in Table 1, this film adhesive tape had a high initial value of visible light transmittance. Further, the visible light transmittance and the adhesive strength after 500 hours of the weather test were not significantly reduced.

［実施例６］
アクリル酸イソオクチル９０部、アクリル酸−２−ヒドロキシエチル５部、β-ＣＥＡの粘着剤組成に架橋剤のポリイソシアネート２部を添加し、均一に混合して得た可視光透過率７８％の粘着剤を可視光透過率９６％のＦＥＰフィルム（７５μｍ厚）に総厚で２５０μｍになるように塗布してフィルム粘着テープを得た。このフィルム粘着テープは、表１に示すとおり、可視光透過率の初期値は高かった。また、ウェザー試験５００時間後の可視光透過率と粘着力は著しい低下が認められなかった。
［実施例７］
アクリル酸６部、アクリル酸ブチル９４部の粘着剤組成に架橋剤のエポキシ樹脂０．３部を添加し、均一に混合して得た可視光透過率８０％の粘着剤を可視光透過率９４％のＰＦＡフィルム（１２５μｍ厚）に総厚で３７５μｍになるように塗布してフィルム粘着テープを得た。このフィルム粘着テープは、表１に示すとおり、可視光透過率の初期値は高かった。また、ウェザー試験５００時間後の可視光透過率と粘着力は著しい低下が認められなかった。 [Example 6]
Adhesive with a visible light transmittance of 78% obtained by adding 90 parts of isooctyl acrylate, 5 parts of 2-hydroxyethyl acrylate, and 2 parts of polyisocyanate as a crosslinking agent to an adhesive composition of β-CEA and mixing them uniformly. The agent was applied to an FEP film (thickness 75 μm) having a visible light transmittance of 96% to a total thickness of 250 μm to obtain a film adhesive tape. As shown in Table 1, this film adhesive tape had a high initial value of visible light transmittance. Further, the visible light transmittance and the adhesive strength after 500 hours of the weather test were not significantly reduced.
[Example 7]
An adhesive having a visible light transmittance of 80% obtained by adding 0.3 part of an epoxy resin as a cross-linking agent to an adhesive composition of 6 parts of acrylic acid and 94 parts of butyl acrylate, and having a visible light transmittance of 94% % PFA film (125 μm thick) was applied to a total thickness of 375 μm to obtain a film adhesive tape. As shown in Table 1, this film adhesive tape had a high initial value of visible light transmittance. Further, the visible light transmittance and the adhesive strength after 500 hours of the weather test were not significantly reduced.

［実施例８］
アクリル酸ブチル８０部、アクリル酸イソボルニル２０部の粘着剤組成に架橋剤の多官能アクリレート０．２部を添加し、均一に混合して得た可視光透過率８４％の粘着剤を可視光透過率９３％のＦＥＰフィルム（１２５μｍ厚）に総厚で５００μｍになるように塗布してフィルム粘着テープを得た。このフィルム粘着テープは、表１に示すとおり、可視光透過率の初期値は高かった。また、ウェザー試験５００時間後の可視光透過率と粘着力は著しい低下が認められなかった。 [Example 8]
80 parts of butyl acrylate and 20 parts of isobornyl acrylate are added with 0.2 parts of polyfunctional acrylate as a cross-linking agent and mixed uniformly to obtain visible light transmittance of 84%. A film adhesive tape was obtained by applying to a 93% FEP film (125 μm thick) so that the total thickness was 500 μm. As shown in Table 1, this film adhesive tape had a high initial value of visible light transmittance. Further, the visible light transmittance and the adhesive strength after 500 hours of the weather test were not significantly reduced.

［実施例９］
アクリル酸１０部、アクリル酸−２−エチルヘキシル９０部の粘着剤組成に架橋剤の多官能アクリレート０．２部を添加し、更に、水素化ロジン樹脂（完全水素化ロジン樹脂）系粘着付与剤５部を添加し、均一に混合して得た可視光透過率８２％の粘着剤を可視光透過率98％のＥＴＦＥフィルム（５０μｍ厚）に総厚で１５０μｍになるように塗布してフィルム粘着テープを得た。このフィルム粘着テープは、表１に示すとおり、可視光透過率の初期値は高かった。また、ウェザー試験５００時間後の可視光透過率と粘着力は著しい低下が認められなかった。 [Example 9]
0.2 parts of a polyfunctional acrylate as a crosslinking agent is added to an adhesive composition of 10 parts of acrylic acid and 90 parts of acrylic acid-2-ethylhexyl, and a hydrogenated rosin resin (fully hydrogenated rosin resin) tackifier 5 A film adhesive tape with an adhesive having a visible light transmittance of 82% obtained by adding a part and uniformly mixing it onto an ETFE film (50 μm thickness) with a visible light transmittance of 98% so that the total thickness is 150 μm. Got. As shown in Table 1, this film adhesive tape had a high initial value of visible light transmittance. Further, the visible light transmittance and the adhesive strength after 500 hours of the weather test were not significantly reduced.

［比較例１］
アクリル酸６部、アクリル酸ブチル９４部の粘着剤組成に架橋剤のエポキシ樹脂０．３部を添加し、均一に混合して得た可視光透過率７８％の粘着剤を可視光透過率９８％のポリプロピレンフィルム（４０μｍ厚）に総厚で１２５μｍになるように塗布してフィルム粘着テープを得た。このフィルム粘着テープは、表１に示すとおり、可視光透過率の初期値は高かった。しかし、ウェザー試験５００時間後の可視光透過率と粘着力は著しい低下が認められた。 [Comparative Example 1]
A pressure-sensitive adhesive having a visible light transmittance of 78% obtained by adding 0.3 part of an epoxy resin as a crosslinking agent to a pressure-sensitive adhesive composition of 6 parts of acrylic acid and 94 parts of butyl acrylate was obtained by uniformly mixing the adhesive with a visible light transmittance of 98%. % Film of polypropylene (40 μm thick) was applied to a total thickness of 125 μm to obtain a film adhesive tape. As shown in Table 1, this film adhesive tape had a high initial value of visible light transmittance. However, the visible light transmittance and the adhesive strength after 500 hours of the weather test were significantly reduced.

［比較例２］
アクリル酸８部、アクリル酸−２−エチルヘキシル９２部の粘着剤組成に架橋剤の多官能アクリレート０．２５部を添加し、均一に混合して得た可視光透過率８２％の粘着剤を可視光透過率９８％のポリエチレンテレフタレートフィルム（５０μｍ厚）に総厚で２００μｍになるように塗布してフィルム粘着テープを得た。このフィルム粘着テープは、表１に示すとおり、可視光透過率の初期値は高かった。しかし、ウェザー試験５００時間後の可視光透過率は著しい低下が認められた。 [Comparative Example 2]
A pressure-sensitive adhesive having a visible light transmittance of 82% obtained by adding 0.25 parts of a polyfunctional acrylate as a crosslinking agent to a pressure-sensitive adhesive composition of 8 parts of acrylic acid and 92 parts of acrylic acid-2-ethylhexyl is visible. The film was applied to a polyethylene terephthalate film (thickness: 50 μm) having a light transmittance of 98% so as to have a total thickness of 200 μm to obtain a film adhesive tape. As shown in Table 1, this film adhesive tape had a high initial value of visible light transmittance. However, a significant decrease in visible light transmittance after 500 hours of weather test was observed.

［比較例３］
アクリル酸４部、アクリル酸ブチル９６部の粘着剤組成に架橋剤の多官能アクリレート０．２部を添加し、均一に混合して得た可視光透過率７７％の粘着剤を可視光透過率９０％のＰＥＴフィルム（１８８μｍ厚）に総厚で２３８μｍになるように塗布してフィルム粘着テープを得た。このフィルム粘着テープは、表１に示すとおり、ウェザー試験５００時間後の可視光透過率は著しい低下が認められた。 [Comparative Example 3]
A pressure-sensitive adhesive having a visible light transmittance of 77% was obtained by adding 0.2 part of a polyfunctional acrylate as a crosslinking agent to a pressure-sensitive adhesive composition of 4 parts of acrylic acid and 96 parts of butyl acrylate, and mixing them uniformly. A 90% PET film (188 μm thick) was applied to a total thickness of 238 μm to obtain a film adhesive tape. As shown in Table 1, this film pressure-sensitive adhesive tape showed a significant decrease in visible light transmittance after 500 hours of weather test.

［比較例４］
アクリル酸５部、アクリル酸ブチル１０部、アクリル酸−２−エチルヘキシル８５部の粘着剤組成に架橋剤のポリイソシアネート２部を添加し、更に、石油樹脂系粘着付与剤１０部を添加し、均一に混合して得た可視光透過率８０％の粘着剤を可視光透過率９８％のＥＴＦＥフィルム（５０μｍ厚）に総厚で１００μｍになるように塗布してフィルム粘着テープを得た。このフィルム粘着テープは、表１に示すとおり、可視光透過率の初期値は高かった。しかし、ウェザー試験５００時間後の可視光透過率と粘着力は著しい低下が認められた。 [Comparative Example 4]
Add 2 parts of a polyisocyanate as a crosslinking agent to an adhesive composition of 5 parts of acrylic acid, 10 parts of butyl acrylate, and 85 parts of 2-ethylhexyl acrylate, and then add 10 parts of a petroleum resin-based tackifier. A pressure-sensitive adhesive having a visible light transmittance of 80% was applied to an ETFE film (thickness: 50 μm) having a visible light transmittance of 98% so as to have a total thickness of 100 μm to obtain a film pressure-sensitive adhesive tape. As shown in Table 1, this film adhesive tape had a high initial value of visible light transmittance. However, the visible light transmittance and the adhesive strength after 500 hours of the weather test were significantly reduced.

［比較例５］
アクリル酸８部、アクリル酸−２−エチルヘキシル９２部の粘着剤組成に架橋剤の多官能アクリレート０．１８部を添加し、更に、ロジンエステル系粘着付与剤１０部を添加し、均一に混合して得た可視光透過率８１％の粘着剤を可視光透過率９４％のＰＦＡフィルム（１２５μｍ厚）に総厚で２００μｍになるように塗布してフィルム粘着テープを得た。このフィルム粘着テープは、表１に示すとおり、可視光透過率の初期値は高かった。しかし、ウェザー試験５００時間後の可視光透過率と粘着力は著しい低下が認められた。 [Comparative Example 5]
Add 0.18 part of a polyfunctional acrylate as a crosslinking agent to an adhesive composition of 8 parts of acrylic acid and 92 parts of acrylic acid-2-ethylhexyl, and then add 10 parts of a rosin ester-based tackifier and mix uniformly. The pressure-sensitive adhesive having a visible light transmittance of 81% was applied to a PFA film (thickness of 125 μm) having a visible light transmittance of 94% to a total thickness of 200 μm to obtain a film pressure-sensitive adhesive tape. As shown in Table 1, this film adhesive tape had a high initial value of visible light transmittance. However, the visible light transmittance and the adhesive strength after 500 hours of the weather test were significantly reduced.

Figure 2006225531
［可視光透過率］日立製作所製Ｕ-３２１０型紫外赤外分光光度計にて、399〜800nmの波長において測定した。
Figure 2006225531
 [Visible light transmittance] It was measured at a wavelength of 399 to 800 nm with a U-3210 type ultraviolet infrared spectrophotometer manufactured by Hitachi, Ltd.

［粘着力］被着体としてステンレス板に、荷重２ｋｇのローラーで一往復させてフィルム粘着テープを貼り合わせた後、２０分後、アイコー引張試験機にて剥離速度３００ｍｍ／ｍｉｎにて測定した。   [Adhesive strength] After being reciprocated once by a roller with a load of 2 kg on a stainless steel plate as an adherend, a film adhesive tape was attached, and after 20 minutes, it was measured with an Aiko tensile tester at a peeling rate of 300 mm / min.

［ウェザー試験］ＪＩＳ−Ｂ−７７５３に準じ、ポリエステルフィルムセパレーターに貼り合せた、フィルム粘着テープのフィルム側から５００時間暴露するよう設置し、測定した。

[Weather test] According to JIS-B-7753, it was installed and exposed for 500 hours from the film side of the film adhesive tape bonded to the polyester film separator.

Claims (5)

フッ素系テープ基材上にアクリル系粘着剤が塗工されたフィルム粘着テープであって、ウェザー試験５００時間後の可視光透過率が６５％以上であることを特徴とするフィルム粘着テープ。   A film pressure-sensitive adhesive tape comprising an acrylic pressure-sensitive adhesive coated on a fluorine-based tape substrate, and having a visible light transmittance of 65% or more after 500 hours of a weather test. 上記フッ素系テープ基材の可視光透過率が９０％以上であり、かつ、上記アクリル系粘着剤の可視光透過率が７０％以上であることを特徴とする請求項１記載のフィルム粘着テープ。   The film pressure-sensitive adhesive tape according to claim 1, wherein the visible light transmittance of the fluorine-based tape substrate is 90% or more, and the visible light transmittance of the acrylic pressure-sensitive adhesive is 70% or more. 上記アクリル系粘着剤が粘着付与剤を含有しないことを特徴とする請求項１乃至請求項２のいずれかに記載のフィルム粘着テープ。   The film adhesive tape according to claim 1, wherein the acrylic adhesive does not contain a tackifier. 上記アクリル系粘着剤が水素化ロジン樹脂粘着付与剤、または、脂肪族完全飽和炭化水素樹脂粘着付与剤、または、水素化テルペン樹脂粘着付与剤のうちの少なくとも１種類の粘着付与剤を含有することを特徴とする請求項１乃至請求項２のいずれかに記載のフィルム粘着テープ。   The acrylic pressure-sensitive adhesive contains at least one kind of a hydrogenated rosin resin tackifier, an aliphatic fully saturated hydrocarbon resin tackifier, or a hydrogenated terpene resin tackifier. The film adhesive tape according to claim 1, wherein the film adhesive tape is a film. 上記フッ素系テープ基材の厚さが１２〜１２５μｍであり、かつ、上記フィルム粘着テープの総厚さが３０〜５００μｍであることを特徴とする請求項１乃至請求項２のいずれかに記載の記載のフィルム粘着テープ。   The thickness of the said fluorine-type tape base material is 12-125 micrometers, and the total thickness of the said film adhesive tape is 30-500 micrometers, It is any one of Claim 1 thru | or 2 characterized by the above-mentioned. The film adhesive tape of description.
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