JP2004307604A - Transparent pressure-sensitive adhesive sheet - Google Patents
Transparent pressure-sensitive adhesive sheet Download PDFInfo
- Publication number
- JP2004307604A JP2004307604A JP2003101175A JP2003101175A JP2004307604A JP 2004307604 A JP2004307604 A JP 2004307604A JP 2003101175 A JP2003101175 A JP 2003101175A JP 2003101175 A JP2003101175 A JP 2003101175A JP 2004307604 A JP2004307604 A JP 2004307604A
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- Prior art keywords
- sensitive adhesive
- transparent
- film substrate
- weather resistance
- adhesive sheet
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
Description
【０００１】
【発明の属する技術分野】
本発明は屋外で使用する透明な粘着シートに関するものである。
【０００２】
【従来の技術】
従来、屋外で使用する透明な粘着シートとしては、透明なフィルム基材としてセロファン、アセテートフィルム、ポリプロピレンフィルム、ポリエステル系フィルム、ナイロンフィルム等を使用し、それらのフィルム基材の一方の面に粘着剤層を積層した積層体が多く使用されている。しかしながら、前記積層構成の粘着シートは、特に屋外で長期間使用すると紫外線などでフィルム基材あるいは粘着剤が経時で劣化し、貼り合わせた面から簡単に剥がれ落ちてしまったり、フィルム基材に印刷された文字、絵柄等が同様に紫外線などで劣化して識別困難になることが多く、種々不都合が生じていた。
【０００３】
前記の問題点を改善するべく種々提案されている（例えば、特許文献１、特許文献２、特許文献３、特許文献４、特許文献５、特許文献６参照。）。
【０００４】
【特許文献１】
特開平７−４０７５３号公報
【特許文献２】
特開平８−１４３８３１号公報
【特許文献３】
特開平８−１７００５５号公報
【特許文献４】
特開平８−２３１９３２号公報
【特許文献５】
特開平８−３２５５３７号公報
【特許文献６】
特開２００１−１１５１０５号公報
【０００５】
【発明が解決しようとする課題】
本発明の課題は、屋外で長期間使用しても、紫外線などによる劣化が少ない透明粘着シートを提供することにある。
【０００６】
【課題を解決するための手段】
本発明の請求項１に係る発明は、透明な高耐候性フィルム基材の一方の面に高耐候性を有する粘着層を積層した積層体からなることを特徴とする透明粘着シートである。
【０００７】
本発明の請求項２に係る発明は、上記請求項１に係る発明において、前記高耐候性フィルム基材が高耐候性高分子樹脂単体若しくは高分子樹脂に少なくとも紫外線吸収剤を添加した混合樹脂からなることを特徴とする透明粘着シートである。
【０００８】
本発明の請求項３に係る発明は、透明で高耐候性を有しない汎用フィルム基材の一方の面に高耐候性を有する組成物からなる表面コート層を積層し、他方の面に高耐候性を有する粘着層を積層した積層体からなることを特徴とする透明粘着シートである。
【０００９】
【作用】
本発明によれば、高耐候性高分子樹脂単体若しくは高分子樹脂に少なくとも紫外線吸収剤を添加した混合樹脂からなる透明な高耐候性フィルム基材の一方の面に高耐候性を有する粘着層を積層しているか、あるいは透明で高耐候性を有しない汎用フィルム基材の一方の面に高耐候性を有する組成物からなる表面コート層を積層し、他方の面に高耐候性を有する粘着層を積層しているので、耐候性が優れており、屋外で長期間使用しても、貼られた面から剥がれ落ちたりすることが無く、また、印刷層を設ける場合でも、印刷層が高耐候性を有する層の間に挟まれて設けられているので、透明粘着シートが屋外で貼られて使用される場合でも紫外線等で劣化し難くなり、印刷された文字、絵柄などが識別出来なくなることが少ない。
【００１０】
【発明の実施の形態】
本発明の透明粘着シートを、実施の形態に沿って以下に詳細に説明する。
【００１１】
図１（ａ）は本発明の透明粘着シートの一実施例の側断面図であり、高耐候性フィルム基材（１）の一方の面に粘着層（３）が積層された構成になっており、（ｂ）は他の実施例の側断面図であり、厚み方向に順に、表面コート層（４）、汎用フィルム基材（２）、粘着層（３）が積層された構成になっている。
【００１２】
さらに、文字、絵柄等の印刷層を設ける場合は、前記高耐候性フィルム基材（１）と粘着層（３）の中間に設けるか、または、汎用フィルム基材（２）と表面コート層（４）の中間若しくは汎用フィルム基材（２）と粘着層（３）の中間に設ける。前記のように印刷層を設けることにより、印刷層が耐候性を有する層で常に保護される状態になるので、紫外線などにより劣化せず、文字などが識別し難くなることが少ない。
【００１３】
前記高耐候性フィルム基材（１）は、無色透明な高耐候性高分子樹脂単体若しくは無色透明で高耐候性を有しない高分子樹脂に少なくとも紫外線吸収剤が添加された混合樹脂からなっており、さらに、前記汎用フィルム基材（２）は無色透明で高耐候性を有しない高分子樹脂からなっている。
【００１４】
前記高耐候性高分子樹脂としてはアクリル系樹脂又はポリフッ化ビニリデン系樹脂が使用可能であり、また、前記高耐候性を有しない高分子樹脂としてはポリエチレンテレフタレート（ＰＥＴ）樹脂、ポリエチレンナフタレート（ＰＥＮ）樹脂、ポリプロピレン樹脂、又はポリアミド樹脂などが使用可能である。
【００１５】
前記高耐候性を有しない高分子樹脂に添加する紫外線吸収剤としては、ベンゾトリアゾール系、ベッゾフェノン系、シアノアクリレート系、ベッゾエート系等の紫外線吸収剤が利用できる。
【００１６】
前記高耐候性フィルム基材（１）及び汎用フィルム基材（２）の他の層が積層される側の表面に、密着性を良くするために、前処理としてコロナ処理、低温プラズマ処理、イオンボンバード処理を施しておいてもよく、さらに薬品処理、溶剤処理などを施してもよい。
【００１７】
前記高耐候性フィルム基材（１）及び汎用フィルム基材（２）の厚さは特に制限を受けるものではないが、粘着シートとしての適性、他の層を積層する場合の加工性等を考慮すると、６〜１００μｍの範囲のものが好ましい。
【００１８】
前記粘着層（３）は、高耐候性を有するアクリル系樹脂を主成分とする粘着剤からなっており、その積層方法は、アクリル系樹脂を主成分とする溶剤タイプあるいはエマルジョンタイプの塗工液をグラビアコート法、ロールコート法、リバースロールコート法等で高耐候性フィルム基材（１）あるいは汎用フィルム基材（２）上に塗布し、乾燥する。塗布量は１０〜２０ｇ／ｍ２（乾燥状態）が好ましい。
【００１９】
前記表面コート層（４）は高耐候性を有する組成物からなっており、例えば熱可塑性樹脂に少なくとも紫外線吸収剤を混合した混合樹脂などを使用する。前記熱可塑性樹脂は使用されている汎用フィルム基材（２）に接着の良い樹脂を適宜選定し、例えば、ポリアミド系樹脂、塩化ビニル／酢酸ビニル共重合体樹脂、ポリエステル系樹脂、ポリウレタン系樹脂、塩素化ポリプロピレン樹脂、アクリル系樹脂等が使用でき、混合する紫外線吸収剤としては、ベンゾトリアゾール系、ベッゾフェノン系、シアノアクリレート系、ベッゾエート系等の紫外線吸収剤が使用できる。その混合量は前記熱可塑性樹脂９５〜７０重量％に対し紫外線吸収剤５〜３０重量％を混合するのが好ましい。前記混合量が５重量％未満であると紫外線吸収性が悪くなり、耐候性が低下し、３０重量％を超えると汎用フィルム基材との接着が悪くなり、良くない。前記熱可塑性樹脂に混合する材料は紫外線吸収剤の他にフェノール系、アミン系、リン系等の酸化防止剤や脂肪族炭化水素、高級脂肪酸、高級脂肪族系アルコール、脂肪酸アマイド系等滑剤やその他Ｎｉ化合物等の光安定剤等を混合しても良い。さらに、具体的な一例をあげると、大日本インキ化学工業（株）製の塗布液（商品名：ＵＣクリアーコート液）を使用して、表面コート層（４）を形成することもできる。
【００２０】
前記表面コート層（４）の積層方法は、総固形分２０〜３０重量％のコート液を公知のグラビアコート法等で塗布、乾燥し積層する。その塗布量は９〜１０ｇ／ｍ２（乾燥状態）が好ましい。
【００２１】
【発明の効果】
本発明の透明粘着シートは、高耐候性高分子樹脂単体若しくは高分子樹脂に少なくとも紫外線吸収剤を添加した混合樹脂からなる透明な高耐候性フィルム基材の一方の面に高耐候性を有する粘着層を積層した積層体、あるいは透明で高耐候性を有しない汎用フィルム基材の一方の面に高耐候性を有する組成物からなる表面コート層を積層し、他方の面に高耐候性を有する粘着層を積層した積層体であるので、耐候性が優れており、屋外で長期間使用しても、貼られた面から剥がれ落ちたりすることが無く、印刷層を設ける場合でも、印刷層が高耐候性を有する層の間に挟まれて積層されているので、常に保護される状態になり、屋外で貼られて使用された場合でも紫外線などで劣化し、文字、絵柄などが識別出来なくなることが少ない。
【図面の簡単な説明】
【図１】（ａ）は本発明の透明粘着シートの一実施例を示す側断面図であり、（ｂ）は他の実施例の側断面図である。
【符号の説明】
１…高耐候性フィルム基材
２…汎用フィルム基材
３…粘着層
４…表面コート層[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a transparent pressure-sensitive adhesive sheet used outdoors.
[0002]
[Prior art]
Conventionally, as a transparent adhesive sheet used outdoors, cellophane, acetate film, polypropylene film, polyester film, nylon film, etc. are used as a transparent film substrate, and an adhesive is applied to one surface of those film substrates. A laminate in which layers are stacked is often used. However, the pressure-sensitive adhesive sheet having the laminated structure, especially when used outdoors for a long period of time, deteriorates the film substrate or the pressure-sensitive adhesive with the passage of time due to ultraviolet rays or the like, and easily peels off from the bonded surface or prints on the film substrate. In many cases, the characters, pictures, etc., which have been degraded, are similarly deteriorated by ultraviolet rays or the like, making it difficult to identify them, resulting in various inconveniences.
[0003]
Various proposals have been made to improve the above problem (for example, see
[0004]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 7-40753 [Patent Document 2]
JP-A-8-143831 [Patent Document 3]
JP-A-8-170055 [Patent Document 4]
Japanese Patent Application Laid-Open No. Hei 8-231932 [Patent Document 5]
Japanese Patent Application Laid-Open No. H8-325537 [Patent Document 6]
JP 2001-115105 A [0005]
[Problems to be solved by the invention]
An object of the present invention is to provide a transparent pressure-sensitive adhesive sheet which is less deteriorated by ultraviolet rays even when used outdoors for a long period of time.
[0006]
[Means for Solving the Problems]
The invention according to
[0007]
The invention according to
[0008]
The invention according to
[0009]
[Action]
According to the present invention, an adhesive layer having high weather resistance on one surface of a transparent high weather resistance film substrate composed of a high weather resistance polymer resin alone or a mixed resin obtained by adding at least an ultraviolet absorber to the polymer resin. Laminated or laminated surface coat layer made of a composition having high weather resistance on one surface of a general-purpose film base material that is transparent and does not have high weather resistance, and an adhesive layer having high weather resistance on the other surface It is excellent in weather resistance because it is laminated, it does not peel off from the pasted surface even if it is used for a long time outdoors, and even if a print layer is provided, the print layer has high weather resistance Since it is provided between layers having properties, even when the transparent pressure-sensitive adhesive sheet is used outdoors pasted, it is hardly deteriorated by ultraviolet rays or the like, and printed characters, pictures, etc. can not be identified. Less is.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
The transparent pressure-sensitive adhesive sheet of the present invention will be described below in detail along with embodiments.
[0011]
FIG. 1A is a side sectional view of one embodiment of the transparent pressure-sensitive adhesive sheet of the present invention, which has a structure in which a pressure-sensitive adhesive layer (3) is laminated on one surface of a highly weather-resistant film substrate (1). (B) is a side sectional view of another embodiment, in which a surface coat layer (4), a general-purpose film substrate (2), and an adhesive layer (3) are laminated in order in the thickness direction. I have.
[0012]
Further, when providing a printed layer of characters, pictures, etc., it is provided between the highly weather-resistant film substrate (1) and the adhesive layer (3), or a general-purpose film substrate (2) and a surface coat layer ( 4) or between the general-purpose film substrate (2) and the adhesive layer (3). By providing the printing layer as described above, the printing layer is always protected by a layer having weather resistance, so that the printing layer is not deteriorated by ultraviolet rays or the like, and characters and the like are hardly distinguished.
[0013]
The high weather resistant film base material (1) is made of a colorless and transparent high weather resistant polymer resin alone or a mixed resin obtained by adding at least an ultraviolet absorber to a colorless and transparent polymer resin having no high weather resistance. Further, the general-purpose film substrate (2) is made of a polymer resin which is colorless and transparent and does not have high weather resistance.
[0014]
Acrylic resin or polyvinylidene fluoride resin can be used as the high weather resistant polymer resin, and polyethylene terephthalate (PET) resin, polyethylene naphthalate (PEN) can be used as the high weather resistant polymer resin. ) Resins, polypropylene resins, polyamide resins and the like can be used.
[0015]
As the UV absorber to be added to the polymer resin having no high weather resistance, UV absorbers such as benzotriazole, bezophenone, cyanoacrylate, and bezoate can be used.
[0016]
Corona treatment, low-temperature plasma treatment, ionization, and the like are performed on the surface on which the other layers of the high weather resistant film substrate (1) and the general-purpose film substrate (2) are laminated, in order to improve the adhesion. A bombardment treatment may be performed, and a chemical treatment, a solvent treatment, or the like may be further performed.
[0017]
The thicknesses of the highly weather-resistant film substrate (1) and the general-purpose film substrate (2) are not particularly limited, but they are determined in consideration of suitability as an adhesive sheet, workability when another layer is laminated, and the like. Then, those having a range of 6 to 100 μm are preferable.
[0018]
The pressure-sensitive adhesive layer (3) is made of a pressure-sensitive adhesive mainly composed of an acrylic resin having high weather resistance. The laminating method is a solvent type or emulsion type coating liquid mainly composed of an acrylic resin. Is applied onto a highly weather-resistant film substrate (1) or a general-purpose film substrate (2) by a gravure coating method, a roll coating method, a reverse roll coating method, or the like, and dried. The coating amount is preferably 10 to 20 g / m 2 (dry state).
[0019]
The surface coat layer (4) is made of a composition having high weather resistance. For example, a mixed resin obtained by mixing at least an ultraviolet absorber with a thermoplastic resin is used. As the thermoplastic resin, a resin having good adhesion to the general-purpose film base material (2) used is appropriately selected. For example, a polyamide resin, a vinyl chloride / vinyl acetate copolymer resin, a polyester resin, a polyurethane resin, A chlorinated polypropylene resin, an acrylic resin, or the like can be used. As the ultraviolet absorber to be mixed, a benzotriazole-based, bezophenone-based, cyanoacrylate-based, or bezoate-based ultraviolet absorber can be used. The mixing amount is preferably such that 5 to 30% by weight of the ultraviolet absorber is mixed with 95 to 70% by weight of the thermoplastic resin. If the mixing amount is less than 5% by weight, the ultraviolet absorption becomes poor, and the weather resistance is lowered. If it exceeds 30% by weight, the adhesion to a general-purpose film substrate becomes poor, which is not good. Materials to be mixed with the thermoplastic resin are phenol-based, amine-based, phosphorus-based antioxidants and aliphatic hydrocarbons, higher fatty acids, higher fatty alcohols, fatty acid amide-based lubricants and the like in addition to ultraviolet absorbers. A light stabilizer such as a Ni compound may be mixed. Furthermore, as a specific example, the surface coating layer (4) can be formed using a coating liquid (trade name: UC clear coat liquid) manufactured by Dainippon Ink and Chemicals, Inc.
[0020]
In the method of laminating the surface coat layer (4), a coating solution having a total solid content of 20 to 30% by weight is applied by a known gravure coating method or the like, dried and laminated. The coating amount is preferably 9 to 10 g / m 2 (dry state).
[0021]
【The invention's effect】
The transparent pressure-sensitive adhesive sheet of the present invention is an adhesive having high weather resistance on one surface of a transparent high weather resistance film substrate composed of a high weather resistance polymer resin alone or a mixed resin obtained by adding at least an ultraviolet absorber to a polymer resin. One surface of a laminated body in which layers are laminated, or a general-purpose film base material that is transparent and does not have high weather resistance is laminated with a surface coat layer made of a composition having high weather resistance, and has high weather resistance on the other surface Since it is a laminate in which an adhesive layer is laminated, it has excellent weather resistance, does not peel off from the surface to which it is adhered even when used outdoors for a long time, and even when a printing layer is provided, the printing layer is As it is sandwiched and laminated between layers having high weather resistance, it is always protected, and even when used outdoors, it is deteriorated by ultraviolet rays etc., and characters and pictures can not be identified Less.
[Brief description of the drawings]
FIG. 1 (a) is a side sectional view showing one embodiment of the transparent pressure-sensitive adhesive sheet of the present invention, and FIG. 1 (b) is a side sectional view of another embodiment.
[Explanation of symbols]
DESCRIPTION OF
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003101175A JP2004307604A (en) | 2003-04-04 | 2003-04-04 | Transparent pressure-sensitive adhesive sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003101175A JP2004307604A (en) | 2003-04-04 | 2003-04-04 | Transparent pressure-sensitive adhesive sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2004307604A true JP2004307604A (en) | 2004-11-04 |
Family
ID=33465058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003101175A Pending JP2004307604A (en) | 2003-04-04 | 2003-04-04 | Transparent pressure-sensitive adhesive sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2004307604A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3786242A1 (en) | 2019-08-27 | 2021-03-03 | Nitto Belgium N.V | Pressure-sensitive adhesive sheet with improved weatherability |
-
2003
- 2003-04-04 JP JP2003101175A patent/JP2004307604A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3786242A1 (en) | 2019-08-27 | 2021-03-03 | Nitto Belgium N.V | Pressure-sensitive adhesive sheet with improved weatherability |
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