JP5715573B2 - 引き伸ばし剥離可能な接着テープ - Google Patents
引き伸ばし剥離可能な接着テープ Download PDFInfo
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- JP5715573B2 JP5715573B2 JP2011544590A JP2011544590A JP5715573B2 JP 5715573 B2 JP5715573 B2 JP 5715573B2 JP 2011544590 A JP2011544590 A JP 2011544590A JP 2011544590 A JP2011544590 A JP 2011544590A JP 5715573 B2 JP5715573 B2 JP 5715573B2
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- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B25/08—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Adhesive Tapes (AREA)
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- Laminated Bodies (AREA)
- Polymerisation Methods In General (AREA)
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Description
ブチルアクリレートは、Mitsubishi Chemical Co.(Minato−ku,Tokyo−to,Japan)から購入したアルキルアクリレートである。
最大引張り伸び/最大引張り強度−方法A
寸法が幅10mm、長さ70mmとなるように、裏材層のテストストリップを調製した。テストストリップの両末端部を、20mmのサンプル標点距離を用いて引張試験機のロードセル(Shimasdzu:AGS−100D)にクランプした。このサンプルを500mm/分のクロスヘッド速度でストリップが破断するまで引っ張った。最大引張り強度(N/cm2)及び最大伸び(%)を求めた。
方法Bは方法Aと同様であるが、サンプル幅を12.5mmとし、標点距離を25mmとした。クロスヘッド速度は305mm/分とした。
幅15mm、長さ30mmの寸法を有する接着テープのテストストリップを調製した。各接着テープは裏材層及び2つの感圧性接着剤層を有した。接着テープの20mmの部分を、ポリ(メチルメタクリレート)基材(Mitsubishi RayonのMR−200)とガラス基材(Nihon Tact Co.,Ltd.のEagle 2000)との間に位置付け、接着テープの10mmを引張りツメとして機能するように残した。得られた物品は、1キログラムのおもり(おもりは物品の上部に配置した)を用いて20分間そのまま置いた。片方のつかみ具がツメをクランプし、もう一方が基材をクランプするようにサンプルを引張試験機に装着し、次いでロードセル(Shimasdzu:AGS−100D)を用いて500mm/分の速度で引っ張った。サンプルのツメを引張り、2つの基材の間から引き伸ばした。接着テープが2つの基材の間からきれいに除かれたことを示す「あり」、又はテープストリップが基材から完全に除かれる前に接着テープが引き裂かれたか、相当量の残留物が基材上に残ったことを示す「なし」のいずれかで結果を特徴づけた。
二重コーティングした接着テープストリップ(1.25cm×2.5cm)を2枚のガラス製顕微鏡スライド(7.6cm×3.80cm)の間に配置し、このアセンブリの一方の末端から突出した25mmのツメを残した。このアセンブリを4.5kgのローラーで2回加圧し、スライドにサンプルをしっかりと結合させた。ガラススライドを下位(固定)のつかみ具で把持し、ツメを上位(クロスヘッド)のつかみ具でクランプするように、アセンブリを引張り試験機(Instron model 4501,Instron Co,Canton,MA)に装着した。つかみ具を30.5cm/分の速度で分離し、引き伸ばしにより脱接着(すなわち剥離)を生じるのに必要な平均力(剥離応力と言い、N/cm2で表す)を記録した。接着テープが2つの基材の間からきれいに除かれたことを示す「あり」、又はテープストリップが基材(ガラススライド)から完全に除かれる前に接着テープが引き裂かれたか、相当量の残留物が基材上に残ったことを示す「なし」のいずれかで結果を特徴づけた。
曇りパーセント及び視感透過率パーセントをASTM法D1003−07に従って決定した。商品名GARDNER BYK COLOR TCS PLUS Model 8870として市販されているBYK Gardner(Columbia,Md.)の分光光度計を用いて測定を行った。CIE標準発光体Aを使用した。
2−エチルヘキシルアクリレート(90部)、アクリル酸(10部)、及び2,2−ジメトキシ−2−フェニルアセトフェノン反応開始剤(0.04phr)の初期混合物から感圧性接着剤シロップを調製した。本明細書で使用されるとき、略語「phr」は、樹脂100部に対する部を表す。この初期混合物を、窒素雰囲気下で、Brookfield粘度が1000〜3000センチポアズになるまで、紫外線で部分重合した。部分重合に続き、2,2−ジメトキシ−2−フェニルアセトフェノン反応開始剤(0.2phr)を1,6−ヘキサンジオールジアクリレート架橋剤(0.08phr)と共に添加した。生じた混合物をプロペラミキサーを使用して十分に混合し、続いて真空ポンプを用いてデシケータ内で慎重に脱気した。シリコーン剥離剤(Teijin DuPont Films Japan Ltd.)で処理したポリエチレンフタレートフィルムに、濡れた状態の厚さ50マイクロメートルのシロップのコーティングを適用した。硬化プロセスを起こすため、約900mJ/平方センチメートルの光量で、このコーティングをUVA(紫外線)光に暴露した。
ヒュームドシリカ(10phr、AEROSIL R972)をコーティング前にシロップに混合した以外は、準備的実施例1に記載するように、別の感圧性接着剤層を調製した。
2−エチルヘキシルアクリレート(75部)、イソボルニルアクリレート(15部)、2−HEA(10部)、及び2,2−ジメトキシ−2−フェニルアセトフェノン反応開始剤(0.04phr)の初期混合物から感圧性接着剤シロップを調製した。この初期混合物を、窒素雰囲気下で、Brookfield粘度が1000〜3000センチポアズになるまで、紫外線で部分重合した。部分重合に続き、2,2−ジメトキシ−2−フェニルアセトフェノン反応開始剤(0.2phr)を1,6−ヘキサンジオールジアクリレート架橋剤(0.03phr)及びヒュームドシリカ(10phr、AEROSIL R300)と共に添加した。生じた混合物をプロペラミキサーを使用して十分に混合した。シリコーン剥離剤(Teijin DuPont Films Japan Ltd.)で処理したポリエチレンフタレートフィルムに、濡れた状態の厚さ50マイクロメートルのシロップのコーティングを適用した。硬化プロセスを起こすため、約900mJ/平方センチメートルの光量で、このコーティングをUVA(紫外線)光に暴露した。
ヒュームドシリカAEROSIL R300(10phr)をヒュームドシリカAEROSIL R972(10phr)に置き換えた以外は、準備的実施例3の手順を用いて、別の感圧性接着剤層を調製した。
一価のモノマーをイソオクチルアクリレート(90phr)及び第三オクチルアクリルアミド(10phr)に置き替え、並びにヒュームドシリカをAEROSIL R972(10phr)に置き換えた以外は、準備的実施例3の手順を用いて、別の感圧性接着剤層を調製した。
一価のモノマーをイソオクチルアクリレート(90phr)及び第三オクチルアクリルアミド(10phr)に置き替えた以外は、準備的実施例3の手順を用いて、別の感圧性接着剤層を調製した。ヒュームドシリカをAEROSIL R972(5phr)に置き換えた。
シリカエアロゲル粉末(10phr、NANOGEL grade OBD201)をコーティング前にシロップに混合した以外は、準備的実施例1に記載するように、別の感圧性接着剤層を調製した。
2−エチルヘキシルアクリレート(66部)、イソボルニルアクリレート(22部)、アクリル酸(10部)、及び2,2−ジメトキシ−2−フェニルアセトフェノン反応開始剤(0.04phr)を含有する初期混合物からシロップを調製した。この初期混合物を、窒素雰囲気下で、Brookfield粘度が1000〜3000センチポアズになるまで、紫外線で部分重合した。部分重合に続き、ネオペンチルグリコールヒドロキシピバレートジアクリレート変性カプロラクトン(0.1phr)及び追加の2,2−ジメトキシ−2−フェニルアセトフェノン反応開始剤(0.2phr)をシロップに追加した。この混合物をプロペラミキサーで十分に混合し、続いて真空ポンプを用いてデシケータ内で慎重に脱気した。濡れた状態の厚さが200マイクロメートルのシロップ層をシリコーン剥離剤で処理したポリエチレンフタレートフィルム上にコーティングし、硬化プロセスを起こすため、UVA光に暴露した。得られた硬化層を裏材層とした。
表1に示すモノマー混合物を用いて、実施例1で記載の方法と同様に実施例2〜7を調製した。各サンプルで裏材層にラミネートした感圧性接着剤層(PSA層)も表1に示した。実施例2〜8の試験結果を表2に含める。方法Aを用いて、最大引張り強度及び最大引張り伸びを決定した。方法Cを用いて、ストリップがきれいに除去できるかを確認した。
表3に示すモノマー混合物を用いて、実施例で記載の方法と同様に実施例8〜13を調製した。各サンプルで裏材層にラミネートした感圧性接着剤層も表3に示した。実施例8〜13の試験結果を表4に含める。方法Dを用いて、サンプルがきれいに除去できるかを確認し、剥離応力を決定した。
100部のブチルアクリレート、及び0.04phr(シロップ100部に対する部)の2,2−ジメトキシ−2−フェニルアセトフェノン反応開始剤を含有する初期混合物からシロップを調製した。この初期混合物を、窒素雰囲気下で、Brookfield粘度が1000〜3000センチポアズに達するまで、紫外線で部分重合した。部分重合後、0.1phrの1,6−ヘキサンジオールジアクリレート及び追加の0.2phrの2,2−ジメトキシ−2−フェニルアセトフェノン反応開始剤をシロップに追加した。この混合物をプロペラミキサーで十分に混合し、続いて真空ポンプを用いてデシケータ内で慎重に脱気した。濡れた状態の厚さが200マイクロメートルのシロップをシリコーン剥離剤で処理したポリエチレンフタレートフィルム上にコーティングし、硬化プロセスを起こすため、UVA光に暴露した。得られた硬化層を裏材層とした。
表2に示すモノマー混合物を用いて、比較例1で記載の方法と同様に比較例2〜4を調製した。各サンプルで裏材層にラミネートした感圧性接着剤層(PSA層)も表5に示した。これら比較例の試験結果を表6に含める。方法Aを用いて、サンプルの最大引張り強度及び最大伸びを決定した。方法Cを用いて、テストサンプルがきれいに除去できるかを確認した。
Claims (3)
- 裏材層と、前記裏材層の主表面に隣接する少なくとも1つの感圧性接着剤層と、を含む接着テープであって、
前記裏材層は、(1)第1の重合性反応混合物の第1の重合生成物を含む、第1のアクリルコポリマーを含み、
前記第1の重合性反応混合物は、
(a)第1の重合性反応混合物中の重合性材料の総重量に基づき0.01〜50重量パーセントの量の少なくとも2つの(メタ)アクリロイル基を含む第1の架橋剤と、
(b)(i)第1の一価のモノマー混合物、又は、(ii)前記第1の一価のモノマー混合物の部分重合生成物と、を含み、
前記第1の一価のモノマー混合物は、
1)前記第1の重合性反応混合物中の前記重合性材料の総重量に基づき少なくとも40重量パーセントに等しい量の低Tg生成アクリルモノマーであって、重合されると、20℃以下のガラス転移温度(Tg)を有するホモポリマーを形成できるアクリルモノマーと、
2)前記第1の重合性反応混合物中の前記重合性材料の総重量に基づき1〜35重量パーセントの量の第1の極性モノマーと、を含み、
前記少なくとも1つの感圧性接着剤層は、
(1)第2の重合性反応混合物の第2の重合生成物を含む、前記第1のアクリルコポリマーとは異なる第2のアクリルコポリマーと、
(2)前記第2のアクリルコポリマーの総重量に基づき1〜25重量パーセントの量で前記第2のアクリルコポリマー中に分散又は懸濁される無機粒子と、を含み、
前記第2の重合性反応混合物は、
(a)前記第2の重合性反応混合物中の重合性材料の総重量に基づき0.01〜25重量パーセントの量の少なくとも2つの(メタ)アクリロイル基を有する第2の架橋剤と、
(b)(i)第2の一価モノマー混合物、又は、(ii)前記第2の一価のモノマー混合物の部分重合生成物のいずれかと、を含み、
前記第2の一価のモノマー混合物は、
1)前記第2の重合性反応混合物中の重合性材料の総重量に基づき少なくとも40重量パーセントに等しい量の少なくとも4個の炭素原子のアルキル基を有するアルキル(メタ)アクリレートと、
2)前記第2の重合性反応混合物中の重合性材料の総重量に基づき1〜40重量パーセントの量の第2の極性モノマーと、を含み、
引き伸ばして剥離され、破断せずに第1の方向に少なくとも50パーセント引き伸ばし可能である、接着テープ。 - 第1の基材、
第2の基材と、
前記第1の基材と前記第2の基材との間に位置付けられる接着テープを含む物品であって、
前記接着テープは、前記第1の基材を前記第2の基材に連結し、
前記接着テープは、
(A)裏材層と、
(B)前記裏材層の第1の主表面に隣接する第1の感圧性接着剤層、及び、前記裏材層の第2の主表面に隣接する第2の感圧性接着剤層と、
(C)前記第1の基材及び前記第2の基材の少なくとも1つを超えて延在するツメと、
を含み、
前記裏材層は、(1)第1の重合性反応混合物の第1の重合生成物を含む第1のアクリルコポリマーを含み、
前記第1の重合性反応混合物は、
(a)前記第1の重合性反応混合物中の重合性材料の総重量に基づき0.01〜50重量パーセントの量の少なくとも2つの(メタ)アクリロイル基を含む第1の架橋剤と、
(b)(i)第1の一価のモノマー混合物、又は、ii)前記第1の一価のモノマー混合物の部分重合生成物と、を含み、
前記第1の一価のモノマー混合物は、
1)前記第1の重合性反応混合物中の前記重合性材料の総重量に基づき少なくとも40重量パーセントに等しい量の低Tg生成アクリルモノマーであって、重合されると、20℃以下のガラス転移温度(Tg)を有するホモポリマーを形成できるアクリルモノマーと、
2)前記第1の重合性反応混合物中の前記重合性材料の総重量に基づき1〜35重量パーセントの量の第1の極性モノマーと、を含み、
前記第1の感圧性接着剤層及び第2の感圧性接着剤層はそれぞれ、
(1)第2の重合性反応混合物の第2の重合生成物を含む、前記第1のアクリルコポリマーとは異なる第2のアクリルコポリマーと、
(2)前記第2のアクリルコポリマーの重量に基づき1〜25重量パーセントの量で前記第2のアクリルコポリマー中に分散又は懸濁される無機粒子と、を含み、
前記第2の重合性反応混合物は、
(a)前記第2の重合性反応混合物中の重合性材料の総重量に基づき0.01〜25重量パーセントの量の少なくとも2つの(メタ)アクリロイル基を有する第2の架橋剤と、
(b)(i)第2の一価のモノマー混合物、又は、(ii)前記第2の一価のモノマー混合物の部分重合生成物と、を含み、
前記第2の一価のモノマー混合物は、
1)前記第2の重合性反応混合物中の重合性材料の総重量に基づき少なくとも40重量パーセントに等しい量の少なくとも4個の炭素のアルキル基を有するアルキル(メタ)アクリレートと、
2)前記第2の重合性反応混合物中の重合性材料の総重量に基づき1〜40重量パーセントの量の第2の極性モノマーと、を含み、
前記ツメを引くことによって前記接着テープが引き伸ばされ、前記第1の基材から、又は前記第2の基材から、又は前記第1の基材及び前記第2の基材の両方から前記接着テープが剥離され、
前記ツメが引かれるとき、前記接着テープが破断せずに第1の方向に少なくとも50パーセント引き伸ばし可能である、物品。 - 第1の基材と、
前記第1の基材に接着される接着テープと、を含む物品であって、
前記接着テープは、
(A)裏材層と、
(B)前記裏材層の第1の主表面に隣接する第1の感圧性接着剤層と、
(C)前記第1の基材を超えて延在するツメと、を含み、
前記裏材層は、(1)第1の重合性反応混合物の第1の重合生成物を含む第1のアクリルコポリマーを含み、
前記第1の重合性反応混合物は、
(a)第1の重合性反応混合物中の重合性材料の総重量に基づき0.01〜50重量パーセントの量の少なくとも2つの(メタ)アクリロイル基を含む第1の架橋剤と、
(b)(i)第1の一価のモノマー混合物、又は、(ii)前記第1の一価のモノマー混合物の部分重合生成物と、を含み、
前記第1の一価のモノマー混合物は、
1)前記第1の重合性反応混合物中の重合性材料の総重量に基づき少なくとも40重量パーセントに等しい量の低Tg生成アクリルモノマーであって、重合されると、20℃以下のガラス転移温度(Tg)を有するホモポリマーを形成できるアクリルモノマーと、
2)前記第1の重合性反応混合物中の重合性材料の総重量に基づき1〜35重量パーセントの量の第1の極性モノマーと、を含み、
前記第1の感圧性接着剤層は、
(1)第2の重合性反応混合物の第2の重合生成物を含む、前記第1のアクリルコポリマーとは異なる第2のアクリルコポリマーと、
(2)前記第2のアクリルコポリマーの重量に基づき1〜25重量パーセントの量で第2のアクリルコポリマー中に分散又は懸濁される無機粒子と、を含み、
前記第2の重合性反応混合物は、
(a)前記第2の重合性反応混合物中の重合性材料の総重量に基づき0.01〜25重量パーセントの量の少なくとも2つの(メタ)アクリロイル基を有する第2の架橋剤と、
(b)(i)第2の一価のモノマー混合物、又は、(ii)前記第2の一価のモノマー混合物の部分重合生成物のいずれかと、を含み、
前記第2の一価のモノマー混合物は、
1)前記第2の重合性反応混合物中の重合性材料の総重量に基づき少なくとも40重量パーセントに等しい量の少なくとも4個の炭素のアルキル基を有するアルキル(メタ)アクリレートと、
2)前記第2の重合性反応混合物中の重合性材料の総重量に基づき1〜40重量パーセントの量の第2の極性モノマーと、を含み、
前記ツメを引くことによって前記接着テープが引き伸ばされ、前記第1の基材から前記接着テープが剥離され、
前記ツメが引かれるとき、前記接着テープが破断せずに第1の方向に少なくとも50パーセント引き伸ばし可能である、物品。
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- 2009-12-29 JP JP2011544590A patent/JP5715573B2/ja not_active Expired - Fee Related
- 2009-12-29 EP EP09797240A patent/EP2379660A1/en not_active Withdrawn
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Publication number | Publication date |
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KR20110102480A (ko) | 2011-09-16 |
TWI452106B (zh) | 2014-09-11 |
WO2010078346A1 (en) | 2010-07-08 |
US20110253301A1 (en) | 2011-10-20 |
TW201033321A (en) | 2010-09-16 |
EP2379660A1 (en) | 2011-10-26 |
CN102325851A (zh) | 2012-01-18 |
US8557378B2 (en) | 2013-10-15 |
KR101668131B1 (ko) | 2016-10-20 |
JP2012514119A (ja) | 2012-06-21 |
SG172431A1 (en) | 2011-07-28 |
CN102325851B (zh) | 2013-12-25 |
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