JP5442988B2 - 蓄光性積層体 - Google Patents
蓄光性積層体 Download PDFInfo
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- JP5442988B2 JP5442988B2 JP2008317253A JP2008317253A JP5442988B2 JP 5442988 B2 JP5442988 B2 JP 5442988B2 JP 2008317253 A JP2008317253 A JP 2008317253A JP 2008317253 A JP2008317253 A JP 2008317253A JP 5442988 B2 JP5442988 B2 JP 5442988B2
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- meth
- sensitive adhesive
- acrylic
- phosphorescent
- pressure
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Description
このようなシートや床材は、蓄光性材料が吸収した光エネルギーが暗闇で発光する性質を利用して、防災や安全用の標示や、種々の案内標示に用いられている。蓄光性材料が発光する際、蓄光性材料の背面に光を隠蔽する層を設けると、より蓄光性能が向上するため、蓄光性材料を含む層の背面に隠蔽性のある層が設けられていることがある。この場合、このような隠蔽性のある層に、さらに粘着剤層が設けられている。
前記カルボキシル基含有(メタ)アクリル系ポリマーは、モノエチレン性不飽和モノマーを主成分とするポリマーであって、その一部にカルボキシル基を含有するモノエチレン性不飽和モノマー(カルボキシル基含有モノエチレン性不飽和モノマー)を含有するものである。前記モノエチレン性不飽和モノマーは、ポリマーの主成分となるものであって、一般には式CH2=CR1COOR2(式中、R1は水素又はメチル基であり、R2は直鎖、環状又は分岐状のアルキル基やフェニル基、アルコキシアルキル基、フェノキシアルキル基、ヒドロキシアルキル基、環状エーテル基である)で表される。このようなモノマーとしては、例えば、メチル(メタ)アクリレート、エチル(メタ)アクリレート、n−ブチル(メタ)アクリレート、イソアミル(メタ)アクリレート、n−ヘキシル(メタ)アクリレート、2−エチルヘキシル(メタ)アクリレート、イソオクチル(メタ)アクリレート、イソノニル(メタ)アクリレート、デシル(メタ)アクリレート、またはドデシル(メタ)アクリレート、シクロヘキシル(メタ)アクリレート等のアルキル(メタ)アクリレート;フェノキシエチル(メタ)アクリレート等のフェノキシアルキル(メタ)アクリレート;メトキシプロピル(メタ)アクリレート、2−メトキシブチル(メタ)アクリレート等のアルコキシアルキル(メタ)アクリレート;2−ヒドロキシエチル(メタ)アクリレート、2−ヒドロキシプロピル(メタ)アクリレート、4−ヒドロキシブチル(メタ)アクリレート等のヒドロキシアルキル(メタ)アクリレート;グリシジル(メタ)アクリレート、テトラヒドロフルフリル(メタ)アクリレート等の環状エーテル含有(メタ)アクリレートなどを挙げることができる。必要に応じ、1種又は2種以上のモノエチレン性不飽和モノマーを使用することができる。
前記芳香族ビニルモノマーを含まないアミノ基含有(メタ)アクリル系ポリマーとは、モノエチレン性不飽和モノマーを主成分とするポリマーであって、その一部にアミノ基含有不飽和モノマーを含有し、かつ芳香族ビニルモノマーをポリマーの構成成分として含まないものである。かかるモノエチレン性不飽和モノマーは、前記カルボキシル基含有(メタ)剤中アクリル系ポリマーの場合と同様であり、前記芳香族ビニルモノマーは、スチレン、α−メチルスチレン、ビニルトルエン、ビニルナフタレン、ビニルアントラセン、ビニルアントラキノン、芳香族アミンの(メタ)アクリルアミド、または水酸基含有芳香族化合物の(メタ)アクリレート等を含む。前記芳香族アミンとしてはアニリン、ベンジルアミン、ナフチルアミン、アミノアントラセン、アミノアントラキノン又はこれらの誘導体が挙げられる。また前記水酸基含有芳香族化合物は前記芳香族アミンに対応する水酸基含有化合物が挙げられる。前記アミノ基含有(メタ)アクリル系ポリマーを得る方法として、モノエチレン性不飽和モノマーとアミノ基を含有する不飽和モノマーとを共重合することが挙げられる。
前記白色顔料として、従来公知の白色顔料、例えば、炭酸亜鉛、酸化亜鉛、硫化亜鉛、または酸化チタン(二酸化チタン)を挙げることができる。また、添加剤としてタルク、カオリン、炭酸カルシウムを含んでもよい。これら白色顔料は単体で、あるいは二種以上を混合して用いることができる。また、これらの白色顔料はいずれの形態でもよく、あるいは従来公知の方法によって各種の分散処理が施されたものであってもよい。
前記着色剤は、白色顔料と芳香族ビニルモノマーを含まないアミノ基含有(メタ)アクリル系ポリマーとを含有する。ここで、前記白色顔料、及び前記芳香族ビニルモノマーを含まないアミノ基含有(メタ)アクリル系ポリマーはそれぞれ上述のとおりである。
蓄光層202は、蓄光性蛍光体を含む樹脂からなる蓄光部203と、実質的に蓄光性蛍光体を含まない樹脂からなる支持部205とから構成することができる。図2に示される態様において、蓄光部203および支持部205に用いられる樹脂は、特に限定されない。例えば図1の説明に記載したような、透明で柔軟性を有する樹脂を使用できる。
このようなライナーは、粘着テープなどの分野で一般的に使用されているものでよく、特定の部材に限定されるものではない。好適なライナーとしては、例えば、紙;ポリエチレン、ポリプロピレン、ポリエステル、または酢酸セルロース等のプラスチック材料;あるいはこのようなプラスチック材料で被覆又はそれを積層された紙やその他の材料などを挙げることができる。これらのライナーは、そのまま使用してもよいが、シリコーン処理あるいはその他の方法で処理して剥離特性を向上させた後に使用することができる。
蓄光性蛍光体(根本特殊化学社製GLL−300M)を30質量部含むポリ塩化ビニル樹脂層(信越ポリマー社製TUJ−7854)を準備した。
アクリル樹脂1(メチルメタクリレート(MMA)/ブチルメタアクリレート(BMA)/ジメチルアミノエチルメタクリレート(Di−methyl−amino−ethyl−methacrylate、DEMAEMA)共重合体、組成比は60:34:6(質量比)、分子量(Mw)は68,000、Tgは63℃(計算値)、酢酸エチル溶液。固形分39%)が10質量部、顔料1(白色顔料、DuPont製TiPureR960、酸化チタン)が50質量部に対してメチルイソブチルケトン(MIBK)を40質量部添加しペイントシェイカー(株式会社シンキー(Thinky)製ARE250)で10分間攪拌し顔料プレミックス溶液を得た。
ゴム系粘着剤(GRN−13B、ビッグテクノス社製)とポリイソシアネート架橋剤(コロネートL−55E、日本ポリウレタン工業社製)を100:1(質量比)で混合し、溶剤はトルエンを用いて固形分約30%となるよう調整し、ナイフコートにより紙ベース両面ポリエチレンラミネート剥離紙上に乾燥後の厚さが50μmになるように塗布して90℃で5分間加熱、乾燥した。
上記の様にして得られたアクリル系白色粘着剤層と床面粘着剤層とを貼り合せて粘着剤層の積層体を得た。上記で得られた蓄光層にプライマー(住友スリーエム社製N200)を塗布・乾燥し、前記粘着剤層の積層体のアクリル系白色粘着剤層をドライラミネートにより貼り合わせて蓄光性積層体を得た。
蓄光性蛍光体(根本特殊化学社製GLL−300M)を30質量部含むポリ塩化ビニル樹脂層(信越ポリマー社製TUJ−7854)の背面に、プライマー(住友スリーエム社製N−200)を塗布・乾燥後、床面粘着剤溶液(淡黄色ゴム系粘着剤(ビッグテクノス社製GRN−13B)とポリイソシアネート架橋剤(日本ポリウレタン工業社製コロネートL−55E)とを100:1で混合した溶液)を、乾燥後厚みが80μmとなるようにナイフコートにより塗布・乾燥して蓄光性積層体を得た。
蓄光性蛍光体(根本特殊化学社製GLL−300M)を30質量部含むポリ塩化ビニル樹脂層(信越ポリマー社製TUJ−7854)の背面に、プライマー(住友スリーエム社製N−200)を塗布・乾燥後、白色顔料(住友スリーエム社製BW9310(アルキド白色顔料分散溶液))を50質量部含む床面粘着剤溶液(ゴム系粘着剤(ビッグテクノス社製GRN−13B)とポリイソシアネート架橋剤(日本ポリウレタン工業社製コロネートL−55E)とを100:1で混合した溶液)を、乾燥後厚みが80μmとなるようにナイフコートにより塗布・乾燥して蓄光性積層体を得た。
黒色と白色が交互に印刷された隠蔽性試験用シート上に、実施例、比較例1〜2で得られた蓄光性積層体を貼り付け、JIS Z 9107 6.3.2に基づき、常用光源ランプD65を用いて200luxで20分間照射後暗転させた後の残光輝度を輝度測定システムにてそれぞれの黒色部、白色部の蓄光性能を測定した。残光輝度値を表1に、黒色部における輝度減衰率を図4にそれぞれ示した。また、蓄光層側からの外観の写真を撮影し図7に示した。
実施例、比較例1および比較例2で得た蓄光性積層体を25mm幅にカットし、モルタル板に貼付して24時間(一日)後および、耐湿試験機(65℃95%)にて一週間養生後の90度剥離接着力(N/25mm)をデジタルフォースゲージ(株式会社イマダ製)にて測定した。結果をそれぞれ図5及び図6に示した。値は接着力(N/25mm+標準偏差)である。
102、202、302 蓄光層
104、204、304 アクリル系白色粘着剤層
203 蓄光部
205 支持部
Claims (5)
- 蓄光層、及び、
前記蓄光層上に積層されたアクリル系白色粘着剤層であって、
(1)カルボキシル基含有(メタ)アクリル系ポリマーと、
(2)白色顔料と、芳香族ビニルモノマーを含まないアミノ基含有(メタ)アクリル系ポリマーとを含む着色剤と、
を含む前記アクリル系白色粘着剤層、
を含む蓄光性積層体。 - 前記アクリル系白色粘着剤が、カルボキシル基含有(メタ)アクリル系ポリマー100質量部に対して、25〜150質量部の白色顔料を含む請求項1に記載の蓄光性積層体。
- 前記アクリル系白色粘着剤層の厚さが、0.02mm〜0.1mmである請求項1または2に記載の蓄光性積層体。
- 前記蓄光層が蓄光部と支持部とから構成される請求項1〜3のいずれか一項に記載の蓄光性積層体。
- 前記蓄光性積層体のアクリル系白色粘着剤層に、さらに床面粘着剤層が積層されている請求項1〜4のいずれか一項に記載の蓄光性積層体。
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KR1020117016052A KR20110098950A (ko) | 2008-12-12 | 2009-12-09 | 광 축적 적층체 |
CN2009801536719A CN102271912A (zh) | 2008-12-12 | 2009-12-09 | 蓄光层合体 |
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