JPWO2003082564A1 - Phosphorescent sheet - Google Patents
Phosphorescent sheet Download PDFInfo
- Publication number
- JPWO2003082564A1 JPWO2003082564A1 JP2003580068A JP2003580068A JPWO2003082564A1 JP WO2003082564 A1 JPWO2003082564 A1 JP WO2003082564A1 JP 2003580068 A JP2003580068 A JP 2003580068A JP 2003580068 A JP2003580068 A JP 2003580068A JP WO2003082564 A1 JPWO2003082564 A1 JP WO2003082564A1
- Authority
- JP
- Japan
- Prior art keywords
- phosphorescent
- powder
- sheet
- sheet according
- resin
- Prior art date
- 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.)
- Pending
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7728—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing europium
- C09K11/7734—Aluminates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/22—Luminous paints
Abstract
本発明では、ポリエチレン、ポリプロピレン、ポリエステル及びポリアミドからなる群から選ばれるプラスチックフィルムの片面に蓄光粉末を含む塗料を塗布した蓄光シートにおいて、蓄光粉末として、Ｅｕを主賦活剤とするアルカリ土類金属のアルミン酸塩よりなる蓄光性蛍光体で、粒子径が２０〜１００μｍであるものを使用することにより、従来の蓄光シートに比して、数倍以上の蓄光性を有する実用性ある蓄光シートの提供を可能とする。In the present invention, in a phosphorescent sheet in which a paint containing phosphorescent powder is applied to one side of a plastic film selected from the group consisting of polyethylene, polypropylene, polyester and polyamide, the phosphorescent powder is an alkaline earth metal having Eu as a main activator. Provision of a practical phosphorescent sheet having a phosphorescent property several times or more compared to a conventional phosphorescent sheet by using a phosphorescent phosphor made of aluminate and having a particle diameter of 20 to 100 μm Is possible.
Description
技術分野
本発明は、蓄光持続性に優れた蓄光シートに関するものである。
背景技術
プラスチックフィルムに蓄光粉末を塗布して蓄光シートを製造することは、広く実施されているものであり、例えば特開平１１−２４１０５２号公報や特開２００１−２４９６１５号公報等の特許出願も存在する。
しかし、蓄光持続性がよいとする特開２００１−２４９６１５号公報の実施例で得られる効果は、蛍光灯照射後１時間経過した後の輝度が１５〜１７ｍｃｄ／ｍ２とされるものである。周囲の物をはっきり確認するためには５ｍｃｄ／ｍ２以上の輝度を必要とするので、この例では、１〜２時間程度の蓄光性しか得られないものと思われる。
本発明は、このような従来の蓄光シートに比して、数倍以上の蓄光性を有する実用性ある蓄光シートを提供することを課題とする。
発明の開示
本発明では、ポリエチレン、ポリプロピレン、ポリエステル及びポリアミドからなる群から選ばれるプラスチックフィルムの片面に蓄光粉末を含む塗料を塗布した蓄光シートにおいて、蓄光粉末として、Ｅｕを主賦活剤とするアルカリ土類金属のアルミン酸塩よりなる蓄光性蛍光体で、粒子径が２０〜１００μｍであるものを使用することにより、上記課題を解決した。
Ｅｕを主賦活剤とするアルカリ土類金属のアルミン酸塩よりなる蓄光性蛍光体を蓄光粉末とすることによって、持続性ある蓄光効果を得ることができるが、本発明では、その粒子径を特定することにより、驚異的に持続性ある蓄光効果を得ることを可能としたのである。粒子径が２０μｍ未満や１００μｍを越えると、所望の効果を得難くなる。なお、蓄光粉末の粒子径は、４０〜８０μｍであるのが特に好ましい。
蓄光粉末を含む塗料の樹脂分としては、ポリウレタン樹脂、アクリル樹脂及びポリエステル樹脂からなる群から選ばれるものを使用するのが好ましい。
なお、塗料における蓄光粉末と樹脂分の割合は、固形分重量比率で１０〜８０：１００、特に２０〜６０：１００程度であるのが好ましい。また、フィルム上への塗料の塗布量は、１００〜３００ｇ／ｍ２、特に１５０〜２５０ｇ／ｍ２程度であるのが好ましい。
蓄光粉末を含む塗料を塗布する基材となるプラスチックフィルムの厚さは特に限定されないが、５０〜２５０μｍ、特に７５〜１５０μｍ程度であるのが好ましい。また、塗料の接着性を高めるため、フィルム表面に、コロナ処理やアンダーコーティング処理を施してもよい。
更に、蓄光シートとしては、プラスチックフィルムの片面に設けた蓄光粉末を含む塗料の塗布層表面に隠蔽層を設けるのが好ましい。この場合、隠蔽層は、ポリウレタン樹脂、ポリエステル樹脂又はアクリル樹脂等に酸化チタンを混合した塗料を塗布して形成するのがよい。
なお、該隠蔽層表面に粘着剤層を介して剥離シートを貼着することにより、蓄光性ある粘着シートとして提供可能となる。
この粘着剤層は、アクリル系粘着剤を２０〜１００μｍ、好ましくは４０〜６０μｍ程度の厚さに塗布して形成すればよい。
かかる本発明では、実施例に示されるように、ＪＩＳ−Ｚ９１０７（安全標識板）の、りん光輝度測定で１０分後の輝度が１００ｍｃｄ／ｍ２以上で、６０分後の輝度が２０ｍｃｄ／ｍ２以上であるような、非常に持続性に優れた蓄光性を有する製品を得ることができる。
発明を実施するための最良の形態
次に本発明の実施例を示すが、これにより本発明の技術的範囲が限定されるものではない。
実施例１
厚さ１００μｍのポリエチレンテレフタレートフィルムを基材とし、粒径６０μｍの蓄光粉末（Ｅｕを主賦活剤とするアルカリ土類金属のアルミン酸塩）を使用し、下記の組成からなる塗料を付着量２００ｇ／ｍ２になるように塗布し、乾燥した。
ポリウレタン樹脂 １００部
蓄光粉末（粒径６０μｍ） ４０部
架橋剤 ３部
メチルエチルケトン ３０部
次に、このようにして得た蓄光粉末含有塗料の塗布層上に、隠蔽性を高めるため、下記配合物で付着量１００ｇ／ｍ２（ｗｅｔ）になるように塗布し、乾燥して、蓄光シートとした。
ポリウレタン樹脂 １００部
酸化チタン ３０部
架橋剤 ３部
メチルエチルケトン ３０部
このようにして得た蓄光シートを、ＪＩＳ−Ｚ９１０７の、りん光輝度測定条件（暗所に３時間外光を遮断し、２００ルクスの照度で２０分間照射）で照射を止めた後、１０分後、６０分後および３００分後の輝度を測定した。なお、輝度計はミノルタＬＳ−１００を使用した。
比較例１
厚さ７５μｍのポリエチレンテレフタレートフィルムポリエステルフィルムを基材とし、蓄光粉末（粒径７μｍ）を使用した以外は、実施例と同様の方法で蓄光シートを得た。これについても、実施例と同様の方法で経時残光輝度を測定した。
実施例２
塗料配合のポリウレタン樹脂をアクリル樹脂に変更した以外は、実施例１と同様の方法で蓄光シートを得た。これについても実施例１と同様の方法で経時残光輝度を測定した。
比較例２
実施例１と同様な方法で蓄光層のみを作成し、蓄光シートを得た。これについても実施例１と同様の方法で経時残光輝度を測定した。
実施例及び比較例で得た試験結果を次表に示す。
．輝度（ｍｃｄ／ｍ ２ ） 暗闇での明るさの感覚
． ５以上 非常に明るく、周囲の物がはっきりと確認できる。
． ３ 物の輪郭がで確認できる程度である。
． ２ 薄くぼやけて、何となく物の存在が確認できる。
． １以下 ほとんど何も確認できない。
本発明の蓄光シートは、実施例に示される如く、５時間〜１０時間というような驚異的な持続性ある蓄光性を示すため、従来の製品では、予想されなかったような広範な用途に蓄光シートの使用を可能とする。TECHNICAL FIELD The present invention relates to a phosphorescent sheet having excellent phosphorescence sustainability.
Background Art It is widely practiced to produce a phosphorescent sheet by applying phosphorescent powder to a plastic film, and there are also patent applications such as JP-A-11-241052 and JP-A-2001-249615. To do.
However, the effect obtained in the example of Japanese Patent Application Laid-Open No. 2001-249615, which has good light storage durability, is that the luminance after 1 hour has elapsed from the fluorescent lamp irradiation is 15 to 17 mcd / m 2 . Since brightness of 5 mcd / m 2 or more is required to clearly confirm the surrounding objects, it is considered that in this example, only phosphorescence of about 1 to 2 hours can be obtained.
An object of the present invention is to provide a practical phosphorescent sheet having a luminous property several times or more compared to such a conventional phosphorescent sheet.
DISCLOSURE OF THE INVENTION In the present invention, in a phosphorescent sheet in which a paint containing phosphorescent powder is applied to one side of a plastic film selected from the group consisting of polyethylene, polypropylene, polyester and polyamide, alkaline earth containing Eu as the main activator as the phosphorescent powder. The above-mentioned problems have been solved by using a phosphorescent phosphor made of a similar metal aluminate having a particle diameter of 20 to 100 μm.
By using a phosphorescent powder composed of an alkaline earth metal aluminate containing Eu as a main activator, a long-lasting phosphorescent effect can be obtained. In the present invention, the particle diameter is specified. By doing so, it was possible to obtain a surprisingly long-lasting phosphorescent effect. When the particle diameter is less than 20 μm or exceeds 100 μm, it is difficult to obtain a desired effect. The particle diameter of the phosphorescent powder is particularly preferably 40 to 80 μm.
As the resin component of the paint containing the phosphorescent powder, it is preferable to use a resin selected from the group consisting of polyurethane resin, acrylic resin and polyester resin.
In addition, it is preferable that the ratio of the phosphorescent powder and the resin component in the coating is about 10 to 80: 100, particularly about 20 to 60: 100 in terms of solid content weight ratio. The coating amount of the coating material onto the film, 100 to 300 g / m 2, it is preferred in particular 150 to 250 g / m 2 approximately.
Although the thickness of the plastic film used as the base material to which the paint containing the phosphorescent powder is applied is not particularly limited, it is preferably about 50 to 250 μm, particularly about 75 to 150 μm. Moreover, in order to improve the adhesiveness of a coating material, you may perform a corona treatment and an undercoating process on the film surface.
Furthermore, as the phosphorescent sheet, it is preferable to provide a concealing layer on the coating layer surface of the coating material containing phosphorescent powder provided on one side of the plastic film. In this case, the concealing layer is preferably formed by applying a paint in which titanium oxide is mixed with polyurethane resin, polyester resin, acrylic resin, or the like.
In addition, it becomes possible to provide as a pressure-sensitive adhesive sheet by sticking a release sheet to the surface of the concealing layer via an adhesive layer.
The pressure-sensitive adhesive layer may be formed by applying an acrylic pressure-sensitive adhesive to a thickness of about 20 to 100 μm, preferably about 40 to 60 μm.
In the present invention, as shown in Examples, the luminance of JIS-Z9107 (safety sign board) after 10 minutes in phosphorescence luminance measurement is 100 mcd / m 2 or more, and the luminance after 60 minutes is 20 mcd / m. The product which has the luminous property which was very excellent in sustainability which is 2 or more can be obtained.
BEST MODE FOR CARRYING OUT THE INVENTION Examples of the present invention will be described below, but the technical scope of the present invention is not limited thereby.
Example 1
Using a polyethylene terephthalate film having a thickness of 100 μm as a base material, a phosphorescent powder having a particle size of 60 μm (an alkaline earth metal aluminate containing Eu as a main activator), and using a coating composition having the following composition with an adhesion amount of 200 g / and m 2, and the coating was dried.
Polyurethane resin 100 parts Luminous powder (particle size 60 μm) 40 parts Cross-linking agent 3 parts Methyl ethyl ketone 30 parts Next, in order to enhance the concealability on the coating layer of the phosphorescent powder-containing paint obtained in this way, adhere with the following composition It apply | coated so that it might become the quantity of 100 g / m < 2 > (wet), it dried, and it was set as the luminous sheet | seat.
Polyurethane resin 100 parts Titanium oxide 30 parts Crosslinker 3 parts Methyl ethyl ketone 30 parts The phosphorescent sheet thus obtained was subjected to phosphorescent luminance measurement conditions of JIS-Z9107 (blocking external light in the dark for 3 hours, After stopping the irradiation at the illuminance for 20 minutes, the luminance after 10 minutes, 60 minutes and 300 minutes was measured. In addition, Minolta LS-100 was used for the luminance meter.
Comparative Example 1
A phosphorescent sheet was obtained in the same manner as in Example except that a polyethylene terephthalate film having a thickness of 75 μm was used as a base material and phosphorescent powder (particle size: 7 μm) was used. Also for this, the afterglow luminance with time was measured by the same method as in the example.
Example 2
A phosphorescent sheet was obtained in the same manner as in Example 1 except that the polyurethane resin containing the paint was changed to an acrylic resin. Also for this, the afterglow luminance with time was measured in the same manner as in Example 1.
Comparative Example 2
Only the phosphorescent layer was prepared in the same manner as in Example 1 to obtain a phosphorescent sheet. Also for this, the afterglow luminance with time was measured in the same manner as in Example 1.
The test results obtained in the examples and comparative examples are shown in the following table.
. Luminance (mcd / m 2 ) Sensation of brightness in the dark . 5 or more Very bright and the surrounding objects are clearly visible.
. 3 To the extent that the outline of an object can be confirmed.
. 2 It is faintly blurred and the presence of something can be confirmed.
. 1 or less Almost nothing can be confirmed.
As shown in the examples, the phosphorescent sheet of the present invention exhibits a surprisingly long-lasting phosphorescent property of 5 hours to 10 hours. The sheet can be used.
Claims (4)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002100408 | 2002-04-02 | ||
| JP2002100408 | 2002-04-02 | ||
| PCT/JP2003/004194 WO2003082564A1 (en) | 2002-04-02 | 2003-04-02 | Luminous sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPWO2003082564A1 true JPWO2003082564A1 (en) | 2005-08-04 |
Family
ID=28672036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003580068A Pending JPWO2003082564A1 (en) | 2002-04-02 | 2003-04-02 | Phosphorescent sheet |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPWO2003082564A1 (en) |
| AU (1) | AU2003236337A1 (en) |
| WO (1) | WO2003082564A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4788944B2 (en) * | 2005-03-18 | 2011-10-05 | 株式会社フジクラ | Powdered phosphor, method for manufacturing the same, light emitting device, and lighting apparatus |
| GR20190100111A (en) * | 2019-03-08 | 2020-10-14 | Editions Carouzel Stickers-Cards-Tags Μονοπροσωπη Ιδιωτικη Κεφαλαιουχικη Εταιρεια | Special fluorescent ink printings at the front side of magnetic or metal plugs or metal cards, at the cover of albums and collection boxes |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11106685A (en) * | 1997-10-02 | 1999-04-20 | Nemoto Tokushu Kagaku Kk | Luminous coating material and display by using the same |
| JPH11140351A (en) * | 1997-11-07 | 1999-05-25 | Kowa Chem Ind Co Ltd | Water-based phosphorescent coating composition and method for applying same |
| JP2000153571A (en) * | 1998-11-18 | 2000-06-06 | C I Kasei Co Ltd | Heat-shrinkable resin laminated film |
| JP3172999B2 (en) * | 1998-12-04 | 2001-06-04 | 日本製紙株式会社 | Luminescent recording sheet |
| JP2000238168A (en) * | 1999-02-19 | 2000-09-05 | Amitei:Kk | Luminous film |
-
2003
- 2003-04-02 WO PCT/JP2003/004194 patent/WO2003082564A1/en active Application Filing
- 2003-04-02 JP JP2003580068A patent/JPWO2003082564A1/en active Pending
- 2003-04-02 AU AU2003236337A patent/AU2003236337A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003236337A1 (en) | 2003-10-13 |
| WO2003082564A1 (en) | 2003-10-09 |
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