JP2009199069A - 粘着型光学フィルムの剥離方法、及び粘着型光学フィルム - Google Patents
粘着型光学フィルムの剥離方法、及び粘着型光学フィルム Download PDFInfo
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- JP2009199069A JP2009199069A JP2009009115A JP2009009115A JP2009199069A JP 2009199069 A JP2009199069 A JP 2009199069A JP 2009009115 A JP2009009115 A JP 2009009115A JP 2009009115 A JP2009009115 A JP 2009009115A JP 2009199069 A JP2009199069 A JP 2009199069A
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- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- 229960001763 zinc sulfate Drugs 0.000 description 1
- 229910000368 zinc sulfate Inorganic materials 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
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Abstract
【解決手段】ガラス基板に粘着型光学フィルムが貼り付けられている光学フィルム付きガラス基板から粘着型光学フィルムを剥離する粘着型光学フィルムの剥離方法において、
光学フィルム付きガラス基板を温度40〜98℃かつ相対湿度60〜99%の環境下に3分間以上曝した後に、前記環境下でガラス基板から粘着型光学フィルムを剥離することを特徴とする粘着型光学フィルムの剥離方法。
【選択図】なし
Description
光学フィルム付きガラス基板を温度40〜98℃かつ相対湿度60〜99%の環境下に3分間以上曝した後に、前記環境下でガラス基板から粘着型光学フィルムを剥離することを特徴とする粘着型光学フィルムの剥離方法、に関する。
架橋処理した直後の粘着剤層を約0.1gとり、これを秤量して重量(W1)を求めた。次いでこれを微孔性テトラフルオロエチレン膜に包んで(膜重量W2)、約50mlの酢酸エチル中23℃下で2日間浸漬したのち、可溶分を抽出した。その後、上記粘着剤層を膜と一緒に取り出し、これを120℃で2時間乾燥し、全体の重量(W3)を測定した。これらの測定値から、下記の式にしたがって、粘着剤層のゲル分率(%)を求めた。また、塗工後、室温で1週間保存したのち(エージング後)のゲル分率を測定した。
ゲル分率(%)={(W3−W2)/W1}×100
作製した粘着型偏光板を320mm×240mmに裁断し、厚さ0.7mmの無アルカリガラス(コーニング社製、♯1737)に貼り付け、50℃、0.5MPaのオートクレーブにて15分間処理した後、60℃/90%RH(加湿試験)、又は80℃(耐熱試験)の条件下で500時間放置した。その後、サンプルの状態を目視にて下記基準で評価した。
○:偏光板の剥がれや浮きがない。
×:偏光板の剥がれや浮きがある。
(アクリル系ポリマーの合成)
撹拌羽根、温度計、窒素ガス導入管、冷却器を備えた四つロフラスコに、ブチルアクリレート100部、4−ヒドロキシブチルアクリレート1部、アクリル酸5部、重合開始剤として2,2´‐アゾビスイソブチロニトリル0.1部(和光純薬社製)、重合溶媒として酢酸エチル200部を仕込み、充分に窒素置換した後、窒素気流下で撹拌しながら約60℃で9時間重合反応を行い、アクリル系ポリマーA1溶液を調製した。
アクリル系ポリマーA1溶液の固形分100部に対して、シランカップリング剤としてN−フェニル−3−アミノプロピルトリメトキシシラン(信越シリコーン社製、KBM573)0.1部、ジベンゾイルパーオキシド(和光純薬社製)0.2部、トリメチロールプロパンのヘキサメチレンジイソシアネート付加物(三井武田ケミカル社製、D−160N)0.05部を均一に混合撹拌し、有機溶剤系アクリル系粘着剤A2を調整した。
有機溶剤系アクリル系粘着剤A2を、シリコーン処理を施したポリエチレンテレフタレートフィルム(東レ社製,厚さ:38μm)の片面に塗布し、130℃で3分間加熱して(計算で得られる過酸化物の分解量は約88%)、乾燥後の厚さが20μmの粘着剤層を形成した。乾燥直後の粘着剤層のゲル分率は65%、エージング後の粘着剤層のゲル分率は77%であった。次いで、偏光板の表面に上記粘着剤層を転写し、粘着型偏光板A3を作製した。粘着型偏光板A3の加湿試験における評価は○及び耐熱試験における評価は○であった。
粘着型偏光板A3をガラス基板(コーニング社製、コーニング#1737)に、2kgローラーで1往復圧着して貼り付け、次いで50℃、0.5MPaのオートクレーブ中に15分間放置し、その後25℃に冷却して偏光板付きガラス基板A4を作製した。
(アクリル系ポリマーの合成)
撹拌羽根、温度計、窒素ガス導入管、冷却器を備えた四つロフラスコに、ブチルアクリレート100部、4−ヒドロキシブチルアクリレート1部、重合開始剤として2,2´‐アゾビスイソブチロニトリル0.1部(和光純薬社製)、重合溶媒として酢酸エチル200部を仕込み、充分に窒素置換した後、窒素気流下で撹拌しながら約60℃で9時間重合反応を行い、アクリル系ポリマーB1溶液を調製した。
アクリル系ポリマーB1溶液の固形分100部に対して、シランカップリング剤としてN−フェニル−3−アミノプロピルトリメトキシシラン(信越シリコーン社製、KBM573)0.1部、ジベンゾイルパーオキシド(和光純薬社製)0.2部、トリメチロールプロパンのヘキサメチレンジイソシアネート付加物(三井武田ケミカル社製、D−160N)0.05部を均一に混合撹拌し、有機溶剤系アクリル系粘着剤B2を調整した。
有機溶剤系アクリル系粘着剤B2を、シリコーン処理を施したポリエチレンテレフタレートフィルム(東レ社製,厚さ:38μm)の片面に塗布し、130℃で3分間加熱して(計算で得られる過酸化物の分解量は約88%)、乾燥後の厚さが20μmの粘着剤層を形成した。乾燥直後の粘着剤層のゲル分率は52%、エージング後の粘着剤層のゲル分率は68%であった。次いで、偏光板の表面に上記粘着剤層を転写し、粘着型偏光板B3を作製した。粘着型偏光板B3の加湿試験における評価は○及び耐熱試験における評価は○であった。
粘着型偏光板B3をガラス基板(コーニング社製、コーニング#1737)に、2kgローラーで1往復圧着して貼り付け、次いで50℃、0.5MPaのオートクレーブ中に15分間放置し、その後25℃に冷却して偏光板付きガラス基板B4を作製した。
偏光板付きガラス基板A4を温度60℃、相対湿度90%の恒温恒湿器中に15分間放置し、その後、前記環境下で粘着型偏光板をガラス基板の角部から剥離した。ガラス基板の表面を目視にて観察したところ、糊残りは全くなかった。
偏光板付きガラス基板A4を温度80℃、相対湿度92%の恒温恒湿器中に5分間放置し、その後、前記環境下で粘着型偏光板をガラス基板の角部から剥離した。ガラス基板の表面を目視にて観察したところ、糊残りは全くなかった。
偏光板付きガラス基板A4を温度60℃、相対湿度90%の恒温恒湿器中に5分間放置し、その後、温度80℃、相対湿度92%の水蒸気を粘着型偏光板とガラス基板との間に吹きつけながら粘着型偏光板をガラス基板の角部から剥離した。ガラス基板の表面を目視にて観察したところ、糊残りは全くなかった。
偏光板付きガラス基板A4を温度50℃、相対湿度90%の恒温恒湿器中に15分間放置し、その後、前記環境下で粘着型偏光板をガラス基板の角部から剥離した。ガラス基板の表面を目視にて観察したところ、糊残りは全くなかった。
偏光板付きガラス基板B4を温度60℃、相対湿度90%の恒温恒湿器中に15分間放置し、その後、前記環境下で粘着型偏光板をガラス基板の角部から剥離した。ガラス基板の表面を目視にて観察したところ、糊残りは全くなかった。
偏光板付きガラス基板A4を温度23℃、相対湿度50%の恒温恒湿器中に15分間放置し、その後、前記環境下で粘着型偏光板をガラス基板の角部から剥離したところ、偏光板が途中で割れて、粘着型偏光板を完全に剥離することができなかった。
偏光板付きガラス基板A4を温度80℃、相対湿度5%の恒温恒湿器中に15分間放置し、その後、前記環境下で粘着型偏光板をガラス基板の角部から剥離した。ガラス基板の表面を目視にて観察したところ、糊残りが多かった。
Claims (5)
- ガラス基板に粘着型光学フィルムが貼り付けられている光学フィルム付きガラス基板から粘着型光学フィルムを剥離する粘着型光学フィルムの剥離方法において、
光学フィルム付きガラス基板を温度40〜98℃かつ相対湿度60〜99%の環境下に3分間以上曝した後に、前記環境下でガラス基板から粘着型光学フィルムを剥離することを特徴とする粘着型光学フィルムの剥離方法。 - 粘着型光学フィルムの粘着剤層は有機溶剤系粘着剤から形成されており、前記有機溶剤系粘着剤は、
1)モノマー単位として、アルキル(メタ)アクリレートを50重量%以上、及び水酸基含有モノマーを0.05〜2重量%含有してなる(メタ)アクリル系ポリマー、
2)シランカップリング剤を前記(メタ)アクリル系ポリマー100重量部に対して0.01〜5重量部、及び
3)架橋剤を前記(メタ)アクリル系ポリマー100重量部に対して0.01〜5重量部含有する請求項1記載の粘着型光学フィルムの剥離方法。 - 前記シランカップリング剤は、アミン系シランカップリング剤である請求項2記載の粘着型光学フィルムの剥離方法。
- 前記架橋剤は、イソシアネート系架橋剤である請求項2又は3記載の粘着型光学フィルムの剥離方法。
- 請求項1〜4のいずれかに記載の粘着型光学フィルムの剥離方法に用いられ、光学フィルムの少なくとも片面に粘着剤層を有する粘着型光学フィルムにおいて、ガラス基板に貼り付けて、温度40〜98℃かつ相対湿度60〜99%の環境下に3分間以上曝した後の接着力が10N/25mm幅以下であることを特徴とする粘着型光学フィルム。
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CN2009801013434A CN101896841A (zh) | 2008-01-25 | 2009-01-20 | 粘合型光学薄膜的剥离方法以及粘合型光学薄膜 |
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US12/864,047 US8685204B2 (en) | 2008-01-25 | 2009-01-20 | Method for peeling pressure-sensitive adhesive optical film, and pressure-sensitive adhesive optical film |
KR1020107018785A KR20100138888A (ko) | 2008-01-25 | 2009-01-20 | 점착형 광학 필름의 박리 방법, 및 점착형 광학 필름 |
EP09703706.3A EP2241911A4 (en) | 2008-01-25 | 2009-01-20 | METHOD FOR REMOVING AN OPTICAL ADHESIVE FILM AND OPTICAL ADHESIVE FILM |
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JP5314439B2 (ja) | 2013-10-16 |
KR20100138888A (ko) | 2010-12-31 |
CN101896841A (zh) | 2010-11-24 |
WO2009093577A1 (ja) | 2009-07-30 |
EP2241911A4 (en) | 2014-03-05 |
US8685204B2 (en) | 2014-04-01 |
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