JPH0990125A - Polarizing plate and ellipsoid polarizing plate adhesive sheet - Google Patents
Polarizing plate and ellipsoid polarizing plate adhesive sheetInfo
- Publication number
- JPH0990125A JPH0990125A JP7244524A JP24452495A JPH0990125A JP H0990125 A JPH0990125 A JP H0990125A JP 7244524 A JP7244524 A JP 7244524A JP 24452495 A JP24452495 A JP 24452495A JP H0990125 A JPH0990125 A JP H0990125A
- Authority
- JP
- Japan
- Prior art keywords
- polarizing plate
- sensitive adhesive
- pressure
- adhesive layer
- adhesive sheet
- 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
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、偏光板及び楕円偏
光板粘着シートに関する。TECHNICAL FIELD The present invention relates to a polarizing plate and an elliptically polarizing plate adhesive sheet.
【０００２】[0002]
【従来の技術】近年、液晶ディスプレーは、高温或いは
高温多湿環境となる車内や屋外での使用機会も増えてき
ており、使用環境の多様化が進んでいる。これに伴い高
温或いは高温多湿環境下にあって、ガラスセルその他の
被着体に貼合された偏光板及び偏光板と位相差板を粘着
剤層を介して貼合した楕円偏光板の粘着剤層が発泡し
て、液晶ディスプレーの表示を不鮮明にしたり、時には
表示不能に至る場合もあって、上記偏光板及び楕円偏光
板粘着剤層に発泡を起こさない上記環境に対する耐久性
が強く求められるようになってきている。2. Description of the Related Art In recent years, liquid crystal displays have been used more and more in vehicles and outdoors where the environment is hot or hot and humid, and the usage environment is diversifying. Along with this, in an environment of high temperature or high temperature and high humidity, a polarizing plate attached to a glass cell or other adherend and an adhesive for an elliptical polarizing plate in which a polarizing plate and a retardation plate are attached via an adhesive layer. There is a case where the layer is foamed to obscure the display of the liquid crystal display or sometimes the display is impossible. Is becoming.
【０００３】従来より上記偏光板及び楕円偏光板粘着シ
ートの高温或いは高温多湿環境に対する耐久性を向上す
る手段として、基材側の高温或いは高温多湿環境におけ
る寸法安定性をアニーリング技術によって改善しようと
するもの、又、接着力と弾性率のバランスにより改善し
ようとするもの、例えば、特開平３−１２４７１号公報
に、アルキル基の炭素数が１〜１２のアクリル酸アルキ
ルエステルを成分とするアクリル系ポリマーを用いたア
クリル系感圧接着剤の上記アクリル系ポリマーの架橋度
がゲル分率に基づいて５０〜９５重量％、好ましくは６
５〜８５重量％であり、且つ、未架橋ポリマーの重量平
均分子量が、１０万以上、好ましくは１５万以上である
と共に、ガラス板に対する７０℃における１８０度剥離
接着力が１００ｇ／２０ｍｍ以上である感圧接着層付偏
光板が開示されている。Conventionally, as a means for improving the durability of the above-mentioned polarizing plate and elliptically polarizing plate pressure-sensitive adhesive sheet against high temperature or high temperature and high humidity environment, the dimensional stability in the high temperature or high temperature and high humidity environment on the base material side has been improved by an annealing technique. And those to be improved by the balance between the adhesive force and the elastic modulus, for example, an acrylic polymer containing an acrylic acid alkyl ester having an alkyl group having 1 to 12 carbon atoms as a component in JP-A-3-12471. The cross-linking degree of the acrylic polymer of the acrylic pressure-sensitive adhesive using is 50 to 95% by weight, preferably 6 based on the gel fraction.
5 to 85% by weight, the weight average molecular weight of the uncrosslinked polymer is 100,000 or more, preferably 150,000 or more, and the 180 ° peel adhesive strength at 70 ° C. to the glass plate is 100 g / 20 mm or more. A polarizing plate with a pressure sensitive adhesive layer is disclosed.
【０００４】しかし、基材側の改善として、偏光板を高
温でアニールすると、偏光板の光学的性能が低下すると
いう欠点があり、上記特開平３−１２４７１号公報に開
示された感圧接着剤層の接着力と弾性率のバランスを重
量平均分子量や架橋度の調整することによって改善しよ
うとする試みも、その調整できる範囲は狭く、多くを期
待し得ないものである。However, as an improvement on the substrate side, when the polarizing plate is annealed at a high temperature, there is a drawback that the optical performance of the polarizing plate is deteriorated, and the pressure-sensitive adhesive disclosed in the above-mentioned JP-A-3-12471. Attempts to improve the balance between the adhesive strength and the elastic modulus of the layer by adjusting the weight average molecular weight and the degree of cross-linking have a narrow adjustable range, and many cannot be expected.
【０００５】本発明者らは、高温或いは高温多湿環境下
で、ガラスセルその他の被着体に貼合された偏光板及び
位相差板の粘着剤層が発泡する作用機構について鋭意検
討し、高温或いは高温多湿環境下で偏光板が収縮し、該
偏光板の収縮に伴い、粘着剤層の粘着剤が変形し、該粘
着剤層の厚さに大きいムラがあると、該粘着剤層の厚さ
ムラの大きい部分が発泡を誘発することを発見した。The present inventors diligently studied the mechanism of action of foaming of the pressure-sensitive adhesive layer of the polarizing plate and the retardation plate attached to the adherend such as a glass cell under a high temperature or high temperature and high humidity environment. Alternatively, when the polarizing plate shrinks in a high temperature and high humidity environment, and the shrinking of the polarizing plate deforms the pressure-sensitive adhesive of the pressure-sensitive adhesive layer, and there is large unevenness in the thickness of the pressure-sensitive adhesive layer, the thickness of the pressure-sensitive adhesive layer It was discovered that the large unevenness portion induces foaming.
【０００６】上記偏光板及び楕円偏光板粘着シートの粘
着剤層の厚さの大きいムラと発泡の関係について検討を
すすめ、全てを解明したものではないが、主たる原因と
して、粘着剤層の厚さに大きいムラがあると該粘着剤
塗膜の乾燥が不均一になり、該粘着剤の架橋も塗布面内
で不均一になること、粘着剤層の大きい厚さムラによ
って発生するガラスセルその他の被着体に貼合時の残留
応力が判明した。Although the relationship between the large unevenness of the pressure-sensitive adhesive layer and the foaming of the pressure-sensitive adhesive sheet of the above-mentioned polarizing plate and elliptically polarizing plate has been investigated and not all have been elucidated, the main cause is the thickness of the pressure-sensitive adhesive layer. If there is a large unevenness in the drying of the pressure-sensitive adhesive coating becomes non-uniform, the cross-linking of the pressure-sensitive adhesive also becomes non-uniform in the coating surface, glass cells and other caused by the large thickness unevenness of the pressure-sensitive adhesive layer The residual stress at the time of sticking to the adherend was found.
【０００７】然るに、上記偏光板及び楕円偏光板粘着シ
ートの粘着剤層の厚さのバラツキが、標準偏差で０．０
５以下であると上記、等の発泡原因が消去されるも
のと推定され、偏光板及び楕円偏光板粘着シートとして
高温或いは高温多湿環境においても安定した光学的性能
を保持し得ることを知見し、本発明を完成するに至った
のである。However, the variation in the thickness of the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet of the polarizing plate and the elliptically polarizing plate is 0.0 in standard deviation.
It is presumed that the causes of foaming such as the above are eliminated when it is 5 or less, and it is found that the polarizing plate and the elliptical polarizing plate adhesive sheet can maintain stable optical performance even in a high temperature or high temperature and high humidity environment, The present invention has been completed.
【０００８】[0008]
【発明が解決しようとする課題】本発明は、叙上の事実
に鑑みなされたものであって、その目的とするところ
は、高温或いは高温多湿環境下で、ガラスセルやその他
の被着体との間で、光学的欠陥を生ぜしめる原因の発泡
を抑制した偏光板及び楕円偏光板粘着シートを提供する
にある。SUMMARY OF THE INVENTION The present invention has been made in view of the above facts, and its purpose is to provide a glass cell and other adherends under high temperature or high temperature and high humidity environment. In between, there is provided a polarizing plate and an elliptically polarizing plate pressure-sensitive adhesive sheet in which foaming which causes an optical defect is suppressed.
【０００９】[0009]
【課題を解決するための手段】本発明は、偏光板及び／
もしくは位相差補償板の表面にアクリル系粘着剤層が設
けられており、その面内のアクリル系粘着剤層の厚さの
バラツキが標準偏差で０．０５以下であることを特徴と
する偏光板及び楕円偏光板粘着シートをその要旨とする
ものである。The present invention is directed to a polarizing plate and / or
Alternatively, the acrylic pressure-sensitive adhesive layer is provided on the surface of the phase difference compensating plate, and the variation in the thickness of the acrylic pressure-sensitive adhesive layer in the surface is a standard deviation of 0.05 or less. And an elliptically polarizing plate adhesive sheet.
【００１０】上記偏光板は、特に限定されるものではな
いが一例を挙げれば、ポリビニルアルコール−ヨウ素錯
体からなるヨウ素系偏光フィルム、ポリビニルアルコー
ル−二色性染料からなる染料系偏光フィルム等の偏光子
をトリアセチルセルロースやポリメタクリル酸メチル等
の光学的異方性がなく、透明性に優れたフィルムからな
る保護層を積層したもの、及び、更に、上記偏光板積層
体にガラスセルや位相差板等の被着体に貼着するための
粘着剤層を設けたものであって、本発明においては、後
者を偏光板粘着シートと称する。上記位相差板は、液晶
表示装置における液晶の複屈折性に基づく着色を位相差
補償板の有する複屈折性を利用して補償し、解消するた
めのものであって、その構成は特に限定されるものでは
ないが一例を挙げれば、ポリカーボネート、ポリサルホ
ン、ポリビニルアルコール、ポリスチレン、ポリアミ
ド、ポリエチレンテレフタレート等の耐熱性、透明性、
延伸性に優れた熱可塑性樹脂フィルムに１．１〜１．５
倍程度の１軸延伸処理を施したもの、及び、更に、上記
位相差補償板にガラスセル等の被着体に貼着するための
粘着剤層を設けたものであって、本発明においては、後
者を位相差補償板粘着シートと称する。上記偏光板粘着
シートを位相差補償板粘着シートの粘着剤層の反対面に
貼合したものを楕円偏光板粘着シートと称する。The polarizing plate is not particularly limited, but one example thereof is a polarizer such as an iodine type polarizing film made of polyvinyl alcohol-iodine complex or a dye type polarizing film made of polyvinyl alcohol-dichroic dye. A laminate of a protective layer made of a film having excellent transparency, which does not have optical anisotropy such as triacetyl cellulose or polymethylmethacrylate, and further, a glass cell or a retardation plate on the polarizing plate laminate. In the present invention, the latter is referred to as a polarizing plate pressure-sensitive adhesive sheet. The retardation plate is for compensating for the coloring based on the birefringence of the liquid crystal in the liquid crystal display device by utilizing the birefringence of the retardation compensating plate and eliminating it, and the configuration thereof is not particularly limited. Although not limited to, one example is heat resistance, transparency, such as polycarbonate, polysulfone, polyvinyl alcohol, polystyrene, polyamide, polyethylene terephthalate,
1.1 to 1.5 for thermoplastic resin film with excellent stretchability
A uniaxially stretched film having a doubling rate, and a retardation compensating plate further provided with a pressure-sensitive adhesive layer for sticking to an adherend such as a glass cell. The latter is referred to as a retardation compensation plate pressure-sensitive adhesive sheet. The polarizing plate pressure-sensitive adhesive sheet bonded to the opposite surface of the pressure-sensitive adhesive layer of the retardation compensation plate pressure-sensitive adhesive sheet is referred to as an elliptically polarizing plate pressure-sensitive adhesive sheet.
【００１１】上記アクリル系粘着剤層は、（メタ）アク
リル酸アルキルエステルを主成分とし、これに極性モノ
マー成分を共重合したアクリル系ポリマーを用いた粘着
剤からなる。上記（メタ）アクリル酸アルキルエステル
とは、アクリル酸アルキルエステル又はメタクリル酸ア
ルキルエステルであって、特に限定されるものではない
が、例えば、（メタ）アクリル酸エチル、（メタ）アク
リル酸イソプロピル、（メタ）アクリル酸ｎ−ブチル、
（メタ）アクリル酸イソブチル、（メタ）アクリル酸ペ
ンチル、（メタ）アクリル酸ベンジル、（メタ）アクリ
ル酸２−エチルヘキシル、（メタ）アクリル酸イソオク
チル、（メタ）アクリル酸オクチル、（メタ）アクリル
酸イソノニル、（メタ）アクリル酸デシル、（メタ）ア
クリル酸ラウリル、（メタ）アクリル酸２−ヒドロキシ
エチル等が挙げられる。The acrylic pressure-sensitive adhesive layer is composed of a pressure-sensitive adhesive using an acrylic polymer having (meth) acrylic acid alkyl ester as a main component and a polar monomer component copolymerized therewith. The (meth) acrylic acid alkyl ester is an acrylic acid alkyl ester or a methacrylic acid alkyl ester and is not particularly limited, and examples thereof include ethyl (meth) acrylate, isopropyl (meth) acrylate, ( N-butyl meth) acrylate,
Isobutyl (meth) acrylate, pentyl (meth) acrylate, benzyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, octyl (meth) acrylate, isononyl (meth) acrylate , Decyl (meth) acrylate, lauryl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, and the like.
【００１２】上記（メタ）アクリル酸アルキルエステル
と共重合する極性モノマーは、例えば、アクリル酸、メ
タクリル酸、イタコン酸、クロトン酸、マレイン酸、フ
マル酸等のカルボキシル基含有モノマー、Ｎ−ビニルピ
ロリドン、Ｎ−ビニルカプロラクタム、アクリロイルモ
ルホリン、（メタ）アクリルアミド、Ｎ−メチロール
（メタ）アクリルアミド、ジメチルアミノエチル（メ
タ）アクリレート、ジエチルアミノエチル（メタ）アク
リレート、ジメチルアミノプロピル（メタ）アクリレー
ト等の窒素含有モノマー、グリシジル（メタ）アクリレ
ート等のエポキシ基含有モノマー、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、ポリオキシプロピレン（メタ）アクリレー
ト、カプロラクトン変成（メタ）アクリレート等の水酸
基含有モノマー等が挙げられる。The polar monomer copolymerizable with the (meth) acrylic acid alkyl ester is, for example, a carboxyl group-containing monomer such as acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic acid or fumaric acid, N-vinylpyrrolidone, Nitrogen-containing monomers such as N-vinylcaprolactam, acryloylmorpholine, (meth) acrylamide, N-methylol (meth) acrylamide, dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate, dimethylaminopropyl (meth) acrylate, glycidyl Epoxy group-containing monomer such as (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, polyoxy Propylene (meth) acrylate, hydroxyl group-containing monomers such as caprolactone-modified (meth) acrylate.
【００１３】上記極性モノマーは、架橋剤を用いて上記
アクリル系ポリマーを架橋する際の架橋点として作用す
る。又、上記極性モノマーの配合量は、上記アクリル系
ポリマーを構成する全モノマーに対し、０．５〜２０重
量％程度が好ましい。The polar monomer acts as a crosslinking point when the acrylic polymer is crosslinked with a crosslinking agent. Further, the blending amount of the polar monomer is preferably about 0.5 to 20% by weight with respect to all the monomers constituting the acrylic polymer.
【００１４】上記架橋剤としては、特に限定されるもの
ではないが、例えば、脂肪族系ジイソシアネート、芳香
族系ジイソシアネート、芳香族系トリイソシアネートの
如きポリイソシアネート化合物、ブチルエーテル化スチ
ロールメラミン、トリメチロールメラミンの如きメラミ
ン系化合物、ポリエチレングリコール、トリメチロール
プロパンの如きグリコール化合物、ヘキサメチレンジア
ミン、ジエチレントリアミンの如きポリアミン系化合
物、その他フェノール樹脂系化合物、エポキシ樹脂系化
合物、尿素樹脂系化合物、ポリアルデヒド系化合物等が
挙げられる。上記架橋剤の配合量は、上記アクリル系ポ
リマー１００重量部に対し、０．３〜１０重量部程度が
好ましい。The cross-linking agent is not particularly limited, but examples thereof include polyisocyanate compounds such as aliphatic diisocyanates, aromatic diisocyanates and aromatic triisocyanates, butyl etherified styrene melamine and trimethylol melamine. Such as melamine compounds, polyethylene glycol, glycol compounds such as trimethylolpropane, hexamethylenediamine, polyamine compounds such as diethylenetriamine, other phenol resin compounds, epoxy resin compounds, urea resin compounds, polyaldehyde compounds and the like. To be The amount of the cross-linking agent blended is preferably about 0.3 to 10 parts by weight with respect to 100 parts by weight of the acrylic polymer.
【００１５】本発明の偏光板及び楕円偏光板粘着シート
は、叙上の如き構成であるので、高温もしくは高温多湿
の環境下の使用であっても、液晶表示装置のガラスセル
に貼着されている偏光板及び位相差板基材フィルムが、
各部材を構成する素材の熱膨張率又は熱収縮率の相違に
よって生ずる寸法変化に起因する気泡の発生を、製造時
に生ずる偏光板及び位相差板粘着シートの不均一性を排
除することによる他、上記偏光板及び位相差補償板基材
フィルムの使用時に生ずる応力を均一に分散する等によ
り抑制することができ、美麗な画像を映写することがで
きる。Since the polarizing plate and the elliptically polarizing plate pressure-sensitive adhesive sheet of the present invention are constructed as described above, they can be adhered to the glass cell of a liquid crystal display device even when used in a high temperature or high temperature and high humidity environment. Polarizing plate and retardation film base film
In addition to eliminating the non-uniformity of the polarizing plate and the retardation plate pressure-sensitive adhesive sheet that occur during manufacturing, the generation of bubbles due to the dimensional change caused by the difference in the coefficient of thermal expansion or the coefficient of thermal contraction of the material that constitutes each member, The stress generated when the polarizing plate and the retardation compensating plate base film are used can be suppressed by uniformly dispersing them, and a beautiful image can be projected.
【００１６】[0016]
【発明の実施の形態】以下、本発明の実施例を挙げて更
に詳細に説明する。アクリル系粘着剤の調製 アクリル酸ブチル９４．８重量部、アクリル酸５重量
部、２−ヒドロキシエチルメタクリレート０．２重量部
を過酸化ベンゾイル０．３重量部の存在下、酢酸エチル
を溶媒として用いて共重合し、重量平均分子量（Ｍw ）
１００万、重量平均分子量と数平均分子量（Ｍn ）の比
（Ｍw ／Ｍn ）４．９のアクリル系ポリマーの酢酸エチ
ル溶液を得た。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail with reference to Examples. Preparation of acrylic pressure-sensitive adhesive 94.8 parts by weight of butyl acrylate, 5 parts by weight of acrylic acid, 0.2 parts by weight of 2-hydroxyethyl methacrylate were used in the presence of 0.3 part by weight of benzoyl peroxide, and ethyl acetate was used as a solvent. Weight average molecular weight (M w )
An ethyl acetate solution of an acrylic polymer having a weight average molecular weight to number average molecular weight (M n ) ratio (M w / M n ) of 4.9 million was obtained.
【００１７】得られた上記アクリル系ポリマーの酢酸エ
チル溶液に、トルエンを加え、、上記アクリル系ポリマ
ー１８重量％のトルエン溶液とし、更に、イソシアネー
ト架橋剤（日本ポリウレタン社製、商品名：コロネート
Ｌ）２重量部を加えアクリル系粘着剤を調製した。Toluene was added to the obtained ethyl acetate solution of the acrylic polymer to prepare a toluene solution containing 18% by weight of the acrylic polymer, and an isocyanate crosslinking agent (manufactured by Nippon Polyurethane Company, trade name: Coronate L). An acrylic pressure-sensitive adhesive was prepared by adding 2 parts by weight.
【００１８】偏光板の作製 ポリビニルアルコール系フィルムを沃素濃度０．５重量
％、沃化カリウム濃度２０重量％及びほう酸濃度１０重
量％に調製した水溶液に浸漬し、５２℃に加熱して３倍
に均一延伸した後、水洗し、風乾して厚さ２４μｍの偏
光フィルムを得た。得られた偏光フィルムの両面に接着
剤を用いて厚さ７５μｍのトリアセチルセルロースフィ
ルムを貼合わせて偏光板を作製した。Preparation of Polarizing Plate A polyvinyl alcohol film was immersed in an aqueous solution having an iodine concentration of 0.5% by weight, a potassium iodide concentration of 20% by weight and a boric acid concentration of 10% by weight, and heated to 52 ° C. to triple the amount. The film was uniformly stretched, washed with water and air-dried to obtain a polarizing film having a thickness of 24 μm. A 75 μm thick triacetyl cellulose film was attached to both surfaces of the obtained polarizing film using an adhesive to prepare a polarizing plate.
【００１９】位相差板の作製 ポリカーボネート樹脂フィルムを、１．３倍に一軸延伸
処理を行い、厚さ５０μｍの位相差補償板を作製した。 Preparation of Retardation Plate A polycarbonate resin film was uniaxially stretched 1.3 times to prepare a retardation compensation plate having a thickness of 50 μm.
【００２０】（実施例１）上記偏光板の表面に溶液キャ
スティング法により上記アクリル系粘着剤を塗工し、乾
燥後の塗膜の厚さの平均値２５．５μｍ、同標準偏差
０．０２μｍの粘着剤層を形成した後、上記偏光板の延
伸方向が辺に４５°の角度をなすように１５０ｍｍ×７
５ｍｍの長方形に切断して偏光板粘着シートを作製し
た。Example 1 The surface of the polarizing plate was coated with the acrylic pressure-sensitive adhesive by the solution casting method, and the average thickness of the coating film after drying was 25.5 μm and the standard deviation was 0.02 μm. After forming the pressure-sensitive adhesive layer, 150 mm × 7 so that the stretching direction of the polarizing plate forms an angle of 45 ° with the side.
A polarizing plate pressure-sensitive adhesive sheet was prepared by cutting into a 5 mm rectangle.
【００２１】（実施例２）実施例１と同様にして、上記
位相差補償板に乾燥後の塗膜の厚さの平均値２５．５μ
ｍ、同標準偏差０．０２μｍの粘着剤層を形成した後、
上記位相差補償板の延伸方向が長辺に平行になるように
１５０ｍｍ×７５ｍｍの長方形に切断して位相差補償板
粘着シートを作製した。(Example 2) In the same manner as in Example 1, the average value of the thickness of the coating film after drying on the above retardation compensating plate was 25.5μ.
m, after forming an adhesive layer having the same standard deviation of 0.02 μm,
The retardation compensating plate pressure-sensitive adhesive sheet was produced by cutting the retardation compensating plate into a rectangle of 150 mm × 75 mm so that the stretching direction was parallel to the long side.
【００２２】（実施例３）実施例１及び実施例２と同様
にして、乾燥後の塗膜の厚さの平均値２５．６μｍ、同
標準偏差０．０１μｍの粘着剤層を有する１５０ｍｍ×
７５ｍｍの楕円偏光板粘着シートを作製した。(Example 3) In the same manner as in Example 1 and Example 2, 150 mm × having an adhesive layer having an average thickness of the dried film of 25.6 μm and a standard deviation of 0.01 μm.
A 75 mm elliptically polarizing plate pressure-sensitive adhesive sheet was prepared.
【００２３】（実施例４）実施例３と同様にして、乾燥
後の塗膜の厚さの平均値２５．１μｍ、同標準偏差０．
０３μｍの粘着剤層を有する１５０ｍｍ×７５ｍｍの楕
円偏光板粘着シートを作製した。(Example 4) In the same manner as in Example 3, the average thickness of the coating film after drying was 25.1 μm and the standard deviation was 0.2.
A 150 mm × 75 mm elliptical polarizing plate pressure-sensitive adhesive sheet having a 03 μm pressure-sensitive adhesive layer was prepared.
【００２４】（比較例１）実施例１と同様にして、乾燥
後の塗膜の厚さの平均値２５．３μｍ、同標準偏差０．
０８μｍの粘着剤層を有する偏光板粘着シートを作製し
た。(Comparative Example 1) In the same manner as in Example 1, the average thickness of the coating film after drying was 25.3 μm and the standard deviation was 0.
A polarizing plate pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer of 08 μm was produced.
【００２５】（比較例２）実施例３と同様にして、乾燥
後の塗膜の厚さの平均値２５．６μｍ、同標準偏差０．
０９μｍの粘着剤層を有する楕円偏光板粘着シートを作
製した。(Comparative Example 2) In the same manner as in Example 3, the average thickness of the coating film after drying was 25.6 μm and the standard deviation thereof was 0.
An elliptically polarizing plate pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer of 09 μm was produced.
【００２６】（比較例３）実施例３と同様にして、乾燥
後の塗膜の厚さの平均値２５．５μｍ、同標準偏差０．
１０μｍの粘着剤層を有する楕円偏光板粘着シートを作
製した。Comparative Example 3 In the same manner as in Example 3, the average thickness of the coating film after drying was 25.5 μm and the standard deviation was 0.
An elliptically polarizing plate pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer of 10 μm was produced.
【００２７】上記実施例及び比較例で得られた偏光板粘
着シート及び楕円偏光板粘着シートの性能を評価するた
め以下の試験を行った。評価結果は表１に示す。 １．高温耐久性試験：試験片の作成 実施例１〜２及び比較例１の偏光板粘着シート及び位相
差補償板粘着シートは、剥離紙を除き、３ｋｇ／ｃｍ2
のラミネート圧でガラス板に積層し、試験片を作成し
た。又、実施例３〜４及び比較例２〜３の楕円偏光板粘
着シートは、予めラミネーターを用いて、位相差補償板
粘着シートの粘着剤層に剥離紙を仮着して保護した反対
の面に、互いに長辺と短辺とが一致するように偏光板粘
着シートの粘着剤層を３ｋｇ／ｃｍ2 のラミネート圧で
貼合わせ、次いで、位相差補償板粘着シートの剥離紙を
除き、同条件で液晶標示装置に用いられるガラス板に積
層して試験片を作成した。上記試験片を温度９０℃に保
たれたギヤオーブン内に１０００時間暴露し、放冷して
常温になった後、目視により各粘着剤層を透視して観察
し、発泡の有無、着色その他の外観異常の有無を評価し
た。The following tests were conducted to evaluate the performance of the polarizing plate pressure-sensitive adhesive sheets and the elliptically polarizing plate pressure-sensitive adhesive sheets obtained in the above Examples and Comparative Examples. The evaluation results are shown in Table 1. 1. High temperature durability test: Preparation of test piece The polarizing plate pressure-sensitive adhesive sheet and the retardation compensating plate pressure-sensitive adhesive sheet of Examples 1 and 2 and Comparative Example 1 were 3 kg / cm 2 excluding release paper.
A test piece was prepared by laminating it on a glass plate with a laminating pressure of. In addition, the elliptically polarizing plate pressure-sensitive adhesive sheets of Examples 3 to 4 and Comparative Examples 2 to 3 were opposite surfaces which were previously protected by temporarily attaching a release paper to the pressure-sensitive adhesive layer of the retardation compensation plate pressure-sensitive adhesive sheet using a laminator. And the pressure-sensitive adhesive layer of the polarizing plate pressure-sensitive adhesive sheet is laminated with a laminating pressure of 3 kg / cm 2 so that the long side and the short side of the sheet are the same, and then the release paper of the phase difference compensating plate pressure-sensitive adhesive sheet is removed under the same conditions. A test piece was prepared by laminating on a glass plate used in the liquid crystal display device. The test piece was exposed in a gear oven maintained at a temperature of 90 ° C. for 1000 hours, allowed to cool to room temperature, and then visually observed through each pressure-sensitive adhesive layer to observe the presence or absence of foaming, coloring, and other factors. The presence or absence of abnormal appearance was evaluated.
【００２８】２．高温多湿耐久性試験：上記試験片を温
度６０℃×９５％ＲＨに保たれた環境試験機内に１００
０時間暴露し、放冷して常温になった後、目視により各
粘着剤層を透視して観察し、発泡の有無、着色その他の
外観異常の有無を評価した。2. High-temperature and high-humidity durability test: 100% of the above test piece in an environmental tester kept at a temperature of 60 ° C and 95% RH.
After exposure for 0 hours and allowing to cool to normal temperature, each pressure-sensitive adhesive layer was visually observed and observed to evaluate whether or not there was foaming and whether or not there was coloring or other appearance abnormality.
【００２９】３．粘着剤層の厚み測定：粘着剤層の厚み
測定は、得られた偏光板粘着シート及び位相差補償板粘
着シートについて、ランダムサンプリングにより測定点
３０を選び定法により厚み測定を行い、平均値及び標準
偏差を算出した。3. Thickness measurement of the pressure-sensitive adhesive layer: For the thickness measurement of the pressure-sensitive adhesive layer, the thickness of the obtained polarizing plate pressure-sensitive adhesive sheet and retardation compensating plate pressure-sensitive adhesive sheet was measured by random sampling, and the thickness was measured by a standard method. The deviation was calculated.
【００３０】[0030]
【表１】 [Table 1]
【００３１】[0031]
【発明の効果】本発明の光学用透明フィルムの製造方法
は、叙上の如く構成されているので、高温もしくは高温
多湿の環境下の使用であっても、液晶表示装置のガラス
セルに貼着されている偏光板及び位相差補償板基材フィ
ルムに気泡の発生がなく、広範な分野での液晶表示装置
の使用において常に美麗な画像を映写することができ
る。Since the method for producing an optical transparent film of the present invention is constructed as described above, it is adhered to a glass cell of a liquid crystal display device even when used in a high temperature or high temperature and high humidity environment. Since no bubbles are generated in the polarizing plate and the retardation compensating plate base film which are used, it is possible to always project a beautiful image in the use of the liquid crystal display device in a wide range of fields.
Claims (1)
面にアクリル系粘着剤層が設けられており、その面内の
アクリル系粘着剤層の厚さのバラツキが標準偏差で０．
０５以下であることを特徴とする偏光板及び楕円偏光板
粘着シート。1. An acrylic pressure-sensitive adhesive layer is provided on the surface of a polarizing plate and / or a retardation compensating plate, and variations in the thickness of the acrylic pressure-sensitive adhesive layer within the surface are standard deviations of 0.
A polarizing plate and an elliptically polarizing plate pressure-sensitive adhesive sheet, characterized by having a ratio of 05 or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7244524A JPH0990125A (en) | 1995-09-22 | 1995-09-22 | Polarizing plate and ellipsoid polarizing plate adhesive sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7244524A JPH0990125A (en) | 1995-09-22 | 1995-09-22 | Polarizing plate and ellipsoid polarizing plate adhesive sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0990125A true JPH0990125A (en) | 1997-04-04 |
Family
ID=17119975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7244524A Pending JPH0990125A (en) | 1995-09-22 | 1995-09-22 | Polarizing plate and ellipsoid polarizing plate adhesive sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0990125A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000313871A (en) * | 1999-04-30 | 2000-11-14 | Nitto Denko Corp | Pressure-sensitive adhesive composition for attaching functional film and image display device |
| JP2002173650A (en) * | 2000-12-04 | 2002-06-21 | Hitachi Chem Co Ltd | Pressure-sensitive adhesive film for protecting optical sheet |
| WO2004099334A1 (en) * | 2003-05-07 | 2004-11-18 | Soken Chemical & Engineering Co., Ltd. | Pressure sensitive adhesive for optical member and laminate |
| JP2009215522A (en) * | 2008-03-13 | 2009-09-24 | Nitto Denko Corp | Double coated pressure-sensitive adhesive sheet and method for fixing plastic film |
| WO2012029471A1 (en) * | 2010-09-03 | 2012-03-08 | 日東電工株式会社 | Adhesive optical film, manufacturing method for same and image display device using same |
| KR20120084682A (en) * | 2011-01-20 | 2012-07-30 | 닛토덴코 가부시키가이샤 | Pressure-sensitive adhesive tape |
| JP2012215889A (en) * | 2010-09-03 | 2012-11-08 | Nitto Denko Corp | Adhesive optical film, manufacturing method therefor, and image display device |
| JP2018199817A (en) * | 2009-06-18 | 2018-12-20 | 日東電工株式会社 | Adhesive sheet for optical use |
| WO2023163119A1 (en) * | 2022-02-25 | 2023-08-31 | 富士フイルム株式会社 | Antireflection film and organic electroluminescent display device |
-
1995
- 1995-09-22 JP JP7244524A patent/JPH0990125A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000313871A (en) * | 1999-04-30 | 2000-11-14 | Nitto Denko Corp | Pressure-sensitive adhesive composition for attaching functional film and image display device |
| JP2002173650A (en) * | 2000-12-04 | 2002-06-21 | Hitachi Chem Co Ltd | Pressure-sensitive adhesive film for protecting optical sheet |
| WO2004099334A1 (en) * | 2003-05-07 | 2004-11-18 | Soken Chemical & Engineering Co., Ltd. | Pressure sensitive adhesive for optical member and laminate |
| JP2009215522A (en) * | 2008-03-13 | 2009-09-24 | Nitto Denko Corp | Double coated pressure-sensitive adhesive sheet and method for fixing plastic film |
| JP2018199817A (en) * | 2009-06-18 | 2018-12-20 | 日東電工株式会社 | Adhesive sheet for optical use |
| CN103257389A (en) * | 2010-09-03 | 2013-08-21 | 日东电工株式会社 | Adhesive optical film, manufacturing method for same and image display device |
| JP2012215889A (en) * | 2010-09-03 | 2012-11-08 | Nitto Denko Corp | Adhesive optical film, manufacturing method therefor, and image display device |
| KR101253020B1 (en) * | 2010-09-03 | 2013-04-15 | 닛토덴코 가부시키가이샤 | Adhesive optical film, manufacturing method for same and image display device using same |
| JP2012133308A (en) * | 2010-09-03 | 2012-07-12 | Nitto Denko Corp | Adhesive optical film, method of manufacturing the same, and image display device |
| TWI413816B (en) * | 2010-09-03 | 2013-11-01 | Nitto Denko Corp | An adhesive type optical film, a manufacturing method thereof, and an image display device |
| US9039861B2 (en) | 2010-09-03 | 2015-05-26 | Nitto Denko Corporation | Adhesive optical film, manufacturing method for the same and image display device using the same |
| US9169423B2 (en) | 2010-09-03 | 2015-10-27 | Nitto Denko Corporation | Adhesive optical film, manufacturing method for the same and image display device using the same |
| WO2012029471A1 (en) * | 2010-09-03 | 2012-03-08 | 日東電工株式会社 | Adhesive optical film, manufacturing method for same and image display device using same |
| KR20120084682A (en) * | 2011-01-20 | 2012-07-30 | 닛토덴코 가부시키가이샤 | Pressure-sensitive adhesive tape |
| WO2023163119A1 (en) * | 2022-02-25 | 2023-08-31 | 富士フイルム株式会社 | Antireflection film and organic electroluminescent display device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7976669B2 (en) | Pressure-sensitive adhesive and retardation layer-attached polarizing plate, method for manufacturing thereof, optical film, and image display | |
| JP5324316B2 (en) | Adhesive polarizing plate, image display device, and manufacturing method thereof | |
| US7435779B2 (en) | Pressure sensitive adhesives for optical film, manufacturing methods for pressure sensitive adhesive layer for optical film, pressure sensitive adhesive layers for optical film, pressure sensitive adhesion type optical films and image displays | |
| KR100960731B1 (en) | Adhesive composition and polarizer using the same | |
| KR20130023183A (en) | Pressure sensitive adhesive | |
| JP5697023B2 (en) | Polarizing plate with pressure-sensitive adhesive layer and method for producing the same | |
| KR100955334B1 (en) | Polarizer having Pressure-Sensitive Adhesive Layer with improved light-leakage property | |
| JP2002212526A (en) | Adhesive type optical film | |
| JPH0990125A (en) | Polarizing plate and ellipsoid polarizing plate adhesive sheet | |
| KR101351623B1 (en) | Adhesive Composition and Optical Member Using the Same | |
| KR20020056447A (en) | Acrylic pressure sensitive adhesive for the polarizing firm | |
| JP2018205497A (en) | Optical laminate, polarization film, and image display unit | |
| JP2002341141A (en) | Adhesion type optical film and liquid crystal display device | |
| JP2001350019A (en) | Pressure-sensitive adhesive polarizing plate and liquid crystal display device | |
| JP2001350020A (en) | Pressure-sensitive adhesive polarizing plat with optical compensation film, and liquid crystal display device | |
| JP2002250814A (en) | Adhesive optical film | |
| JPH09227841A (en) | Preparation of pressure-sensitive adhesive polarizing plate | |
| CN107960128B (en) | The measuring method of the birefringent temperature dependency of adhesive, design/manufacture adhesive method, adhesive, display and optical thin film | |
| JPH09243824A (en) | Adhesive tape for surface protection and production of polarizing plate composite body | |
| JP2002277634A (en) | Adhesive optical film and adhesive for optical film | |
| WO2022224494A1 (en) | Retardation layer-equipped polarizing plate | |
| KR102469376B1 (en) | Polarizing plate and optical display apparatus comprising the same | |
| JP2002139626A (en) | Optical film with adhesive layer | |
| JPH09189810A (en) | Production of polarizing plate having tacky adhesive layer or phase difference plate or elliptical polarizing plate | |
| JP2002169017A (en) | Adhesive optical film and adhesive for optical film |