JP2000266933A - Optical member - Google Patents

Optical member

Info

Publication number
JP2000266933A
JP2000266933A JP11071441A JP7144199A JP2000266933A JP 2000266933 A JP2000266933 A JP 2000266933A JP 11071441 A JP11071441 A JP 11071441A JP 7144199 A JP7144199 A JP 7144199A JP 2000266933 A JP2000266933 A JP 2000266933A
Authority
JP
Japan
Prior art keywords
optical member
layer
low oxygen
film
outermost surface
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
Application number
JP11071441A
Other languages
Japanese (ja)
Inventor
Masayuki Satake
正之 佐竹
Yasushi Takahashi
寧 高橋
Yuji Saiki
雄二 済木
Takamori Shoda
位守 正田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nitto Denko Corp
Original Assignee
Nitto Denko Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nitto Denko Corp filed Critical Nitto Denko Corp
Priority to JP11071441A priority Critical patent/JP2000266933A/en
Publication of JP2000266933A publication Critical patent/JP2000266933A/en
Pending legal-status Critical Current

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  • Surface Treatment Of Optical Elements (AREA)
  • Polarising Elements (AREA)

Abstract

PROBLEM TO BE SOLVED: To easily separate and remove an unnecessary surface protection film from an optical member by forming at least one side outermost surface into a specific low oxygen layer. SOLUTION: At least one side outermost surface of an optical member 2 is formed out of a low oxygen layer 21 containing under 35% oxygen atom and over 60% carbon atom on the element ratio. In this case, the low oxygen layer 21 intends to restrain rise of adhesion force with the lapse of time of a surface protection film 1, and formed out of a substance containing under 35% oxygen atom and over 60% carbon atom on the element ratio. This low oxygen layer 21 is enough to be on the outermost surface of the side covered by the surface protection film 1. Namely the low oxygen layer 21 can be formed as an optical layer such as a polarizing plate or a phase difference plate forming the outermost surface of the optical member 2, or can be formed as an addition layer by a suitable system such as a coat system or a transfer system on the outermost surface of the optical member 2.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の技術分野】本発明は、表面保護フィルムの剥離
性に優れる光学部材に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical member having excellent surface protective film releasability.

【0002】[0002]

【発明の背景】液晶表示装置(LCD)等の形成に用い
る光学部材、例えば偏光板や位相差板やそれらを積層し
た楕円偏光板などは、所定サイズへの打抜き加工、積重
ね輸送や保管、検査や接着処理等の取扱の際に光学部材
の表面が損傷されないようにその片面又は両面を接着カ
バーする表面保護フィルムが設けられる。その表面保護
フィルムは通例、保護基材に粘着層を設けたものにて形
成され、表面保護が不要になると光学部材より剥離除去
される。
BACKGROUND OF THE INVENTION Optical members used for forming a liquid crystal display (LCD) and the like, such as a polarizing plate, a retardation plate, and an elliptically polarizing plate obtained by laminating them, are punched into a predetermined size, stacked, transported, stored, and inspected. In order to prevent the surface of the optical member from being damaged at the time of handling such as a bonding process or the like, a surface protective film for covering one or both surfaces thereof is provided. The surface protective film is usually formed of a protective substrate provided with an adhesive layer, and is removed from the optical member when surface protection becomes unnecessary.

【0003】しかしながら、従来にあっては光学部材に
対する表面保護フィルムの接着力が経時的に上昇し表面
保護が不要になって光学部材より剥離除去する際には接
着初期の接着力よりも大きく上昇して、その剥離除去に
多時間多労力を要して作業効率に乏しく、接着力の過度
の上昇で光学部材を損壊する場合のある問題点があっ
た。LCDサイズの拡大と共に、その傾向はより顕著に
なってきている。
However, in the prior art, the adhesive strength of the surface protective film to the optical member increases with time, and the surface protection becomes unnecessary. In addition, there is a problem that the optical member is damaged due to an excessive increase in the adhesive force, which requires a lot of time and labor for stripping and removing, resulting in poor work efficiency. With the increase in LCD size, the trend has become more pronounced.

【0004】[0004]

【発明の技術的課題】本発明は、従来の表面保護フィル
ムを用いてもその接着力が経時上昇しにくくて表面保護
が不要となった際に光学部材より容易に剥離除去できる
光学部材の開発を課題とする。
SUMMARY OF THE INVENTION The present invention is directed to the development of an optical member that can be easily peeled off and removed from an optical member when the surface protection film is not required because the adhesive force of the conventional surface protective film hardly increases with time. As an issue.

【0005】[0005]

【課題の解決手段】本発明は、少なくとも片側の最表面
が、元素比率に基づいて酸素原子が35%以下で、かつ
炭素原子が60%以上である低酸素層からなることを特
徴とする光学部材を提供するものである。
According to the present invention, there is provided an optical device wherein at least one outermost surface comprises a low oxygen layer in which oxygen atoms are 35% or less and carbon atoms are 60% or more based on the element ratio. A member is provided.

【0006】[0006]

【発明の効果】本発明によれば、低酸素層を介して接着
した表面保護フィルムの接着力が経時上昇しにくく、従
来の表面保護フィルムを接着して必要な打抜き加工、積
重ね輸送や保管、検査や接着処理等の措置を施した後、
不要となった表面保護フィルムを光学部材より容易に剥
離除去することができ、その剥離除去作業を能率よく行
えて、剥離の際の光学部材の損壊を回避することができ
る。
According to the present invention, the adhesion of the surface protective film adhered via the low oxygen layer is unlikely to increase with time, and the conventional surface protective film is adhered and required for punching, stacking transportation and storage. After taking measures such as inspection and bonding,
The unnecessary surface protection film can be easily peeled and removed from the optical member, the peeling and removing operation can be performed efficiently, and damage to the optical member at the time of peeling can be avoided.

【0007】[0007]

【発明の実施形態】本発明による光学部材は、少なくと
も片側の最表面が、元素比率に基づいて酸素原子が35
%以下で、かつ炭素原子が60%以上である低酸素層か
らなるものである。その例を図1に示した。1が表面保
護フィルム、2が光学部材で、21がその低酸素層であ
り、3は粘着層、4はセパレータである。
BEST MODE FOR CARRYING OUT THE INVENTION In the optical member according to the present invention, at least one outermost surface has 35 oxygen atoms based on the element ratio.
% Or less and 60% or more of carbon atoms. An example is shown in FIG. 1 is a surface protective film, 2 is an optical member, 21 is its low oxygen layer, 3 is an adhesive layer, and 4 is a separator.

【0008】光学部材は、例えば偏光板や位相差板、そ
れらを積層した楕円偏光板等の液晶表示装置の形成など
に用いられる適宜なものであってよく、その種類につい
て特に限定はない。従って偏光板は、反射型のものなど
であってもよい。また位相差板も、1/2や1/4等の
波長板や視角補償などの適宜な目的を有するものであっ
てよい。なお前記した楕円偏光板の如き積層タイプの光
学部材の場合、その積層は粘着層等の適宜な接着手段を
介し行われたものであってよい。
The optical member may be any suitable one used for forming a liquid crystal display device such as a polarizing plate, a retardation plate, or an elliptically polarizing plate obtained by laminating them, and the type thereof is not particularly limited. Therefore, the polarizing plate may be a reflection type or the like. Also, the retardation plate may have an appropriate purpose, such as a half-wave plate or a quarter-wave plate or viewing angle compensation. In the case of a laminated optical member such as the above-mentioned elliptically polarizing plate, the lamination may be performed through an appropriate bonding means such as an adhesive layer.

【0009】ちなみに前記した偏光板の具体例として
は、ポリビニルアルコール系フィルムや部分ホルマール
化ポリビニルアルコール系フィルム、エチレン・酢酸ビ
ニル共重合体系部分ケン化フィルムの如き親水性高分子
フィルムにヨウ素及び/又は二色性染料を吸着させて延
伸したもの、ポリビニルアルコールの脱水処理物やポリ
塩化ビニルの脱塩酸処理物の如きポリエン配向フィルム
からなる偏光フィルムなどがあげられる。また偏光板
は、その片面又は両面に透明保護層を有するものなどで
あってもよい。
Incidentally, specific examples of the above-mentioned polarizing plate include iodine and / or iodine on a hydrophilic polymer film such as a polyvinyl alcohol-based film, a partially formalized polyvinyl alcohol-based film, and an ethylene / vinyl acetate copolymer-based partially saponified film. Examples thereof include a film obtained by adsorbing a dichroic dye and stretching, a polarizing film made of a polyene oriented film such as a dehydrated product of polyvinyl alcohol and a dehydrochlorinated product of polyvinyl chloride. The polarizing plate may have a transparent protective layer on one or both sides.

【0010】一方、反射型偏光板は、偏光板に反射層を
設けたもので、視認側(表示側)からの入射光を反射さ
せて表示するタイプの液晶表示装置などを形成するため
のものであり、バックライト等の光源の内蔵を省略でき
て液晶表示装置の薄型化をはかりやすいなどの利点を有
する。反射型偏光板の形成は、必要に応じ透明保護層等
を介して偏光板の片面に金属等からなる反射層を付設す
る方式などの適宜な方式にて行うことができる。
On the other hand, the reflection type polarizing plate is provided with a reflection layer on the polarizing plate, and is used for forming a liquid crystal display device or the like of a type that reflects incident light from the viewing side (display side) to display. In addition, there is an advantage that a built-in light source such as a backlight can be omitted, and the thickness of the liquid crystal display device can be easily reduced. The reflective polarizing plate can be formed by an appropriate method such as a method in which a reflective layer made of metal or the like is provided on one surface of the polarizing plate via a transparent protective layer or the like as necessary.

【0011】反射型偏光板の具体例としては、必要に応
じマット処理した透明保護層の片面に、アルミニウム等
の反射性金属からなる箔や蒸着膜を付設して反射層を形
成したものなどがあげられる。また前記の透明保護層に
微粒子を含有させて表面微細凹凸構造とし、その上に微
細凹凸構造の反射層を有するものなどもあげられる。な
お反射層は、その反射面が透明保護層や偏光板等で被覆
された状態の使用形態が、酸化による反射率の低下防
止、ひいては初期反射率の長期持続の点や、保護層の別
途付設の回避の点などより好ましい。
Specific examples of the reflective polarizing plate include a transparent protective layer which is matted if necessary, and a reflective layer formed by attaching a foil or a vapor-deposited film made of a reflective metal such as aluminum to one surface of the transparent protective layer. can give. Further, there may be mentioned, for example, those in which fine particles are contained in the transparent protective layer to form a fine surface uneven structure, and a reflective layer having a fine uneven structure is provided thereon. The reflective layer is used in a state where the reflective surface is covered with a transparent protective layer, a polarizing plate, or the like, in order to prevent a decrease in reflectance due to oxidation, and to maintain the initial reflectance for a long period of time, and to separately provide a protective layer. Is more preferable.

【0012】前記した微細凹凸構造の反射層は、入射光
を乱反射により拡散させて指向性やギラギラした見栄え
を防止し、明暗のムラを抑制しうる利点などを有する。
また微粒子含有の透明保護層は、入射光及びその反射光
がそれを透過する際に拡散されて明暗ムラをより抑制し
うる利点なども有している。
The reflective layer having the above-described fine uneven structure has an advantage that the incident light is diffused by irregular reflection to prevent directivity and glaring appearance, and that unevenness in brightness can be suppressed.
Further, the transparent protective layer containing fine particles also has an advantage that the incident light and the reflected light thereof are diffused when transmitting the light and the unevenness of light and darkness can be further suppressed.

【0013】透明保護層の表面微細凹凸構造を反映させ
た微細凹凸構造の反射層の形成は、例えば真空蒸着方
式、イオンプレーティング方式、スパッタリング方式等
の蒸着方式やメッキ方式などの適宜な方式で金属を透明
保護層の表面に直接付設する方法などにより行うことが
できる。
The reflection layer having a fine uneven structure reflecting the fine uneven structure on the surface of the transparent protective layer is formed by an appropriate method such as an evaporation method such as a vacuum evaporation method, an ion plating method and a sputtering method, and a plating method. The method can be performed by directly attaching a metal to the surface of the transparent protective layer.

【0014】なお上記した偏光板における透明保護層の
形成には、透明性、機械的強度、熱安定性、水分遮蔽性
等に優れるポリマーなどが好ましく用いられる。その例
としては、ポリエステル系樹脂やアセテート系樹脂、ポ
リエーテルサルホン系樹脂やポリカーボネート系樹脂、
ポリアミド系樹脂やポリイミド系樹脂、ポリオレフィン
系樹脂やアクリル系樹脂、あるいはアクリル系やウレタ
ン系、アクリルウレタン系やエポキシ系やシリコーン系
等の熱硬化型、ないし紫外線硬化型の樹脂などがあげら
れる。
For the formation of the transparent protective layer in the above-mentioned polarizing plate, a polymer or the like having excellent transparency, mechanical strength, heat stability and moisture shielding properties is preferably used. Examples of such resins include polyester resins and acetate resins, polyethersulfone resins and polycarbonate resins,
Examples of the resin include a polyamide resin, a polyimide resin, a polyolefin resin, an acrylic resin, and a thermosetting resin such as an acrylic resin, a urethane resin, an acrylic urethane resin, an epoxy resin, or a silicone resin, or an ultraviolet curable resin.

【0015】透明保護層は、ポリマーの塗布方式やフィ
ルムとしたものの積層方式などの適宜な方式で形成して
よく、厚さは適宜に決定してよい。一般には500μm
以下、就中1〜300μm、特に5〜200μmの厚さと
される。なお表面微細凹凸構造の透明保護層の形成に含
有させる微粒子としては、例えば平均粒径が0.5〜5
0μmのシリカやアルミナ、チタニアやジルコニア、酸
化錫や酸化インジウム、酸化カドミウムや酸化アンチモ
ン等からなる、導電性のこともある無機系微粒子、架橋
又は未架橋のポリマー等からなる有機系微粒子などの透
明微粒子が用いられる。微粒子の使用量は、透明樹脂1
00重量部あたり2〜50重量部、就中5〜25重量部
が一般的である。
The transparent protective layer may be formed by an appropriate method such as a method of applying a polymer or a method of laminating a film, and the thickness may be appropriately determined. Generally 500 μm
Hereinafter, the thickness is preferably 1 to 300 μm, particularly 5 to 200 μm. The fine particles to be contained in the formation of the transparent protective layer having the fine surface irregularity structure include, for example, an average particle size of 0.5 to 5
Transparent inorganic fine particles of 0 μm silica, alumina, titania, zirconia, tin oxide, indium oxide, cadmium oxide, antimony oxide, and the like, and organic fine particles of a crosslinked or uncrosslinked polymer, etc. Fine particles are used. The amount of fine particles used is 1
It is common to use 2 to 50 parts by weight, especially 5 to 25 parts by weight, per 100 parts by weight.

【0016】一方、上記した位相差板の具体例として
は、ポリカーボネートやポリビニルアルコール、ポリス
チレンやポリメチルメタクリレート、ポリプロピレンや
その他のポリオレフィン、ポリアリレートやポリアミド
の如き適宜なポリマーからなるフィルムを延伸処理して
なる複屈折性フィルムや液晶ポリマーの配向フィルム、
液晶ポリマーの配向層をフィルムにて支持したものなど
があげられる。
On the other hand, as a specific example of the above retardation plate, a film made of an appropriate polymer such as polycarbonate, polyvinyl alcohol, polystyrene, polymethyl methacrylate, polypropylene, other polyolefin, polyarylate, or polyamide is stretched. Birefringent film or liquid crystal polymer oriented film,
Examples thereof include a film in which an alignment layer of a liquid crystal polymer is supported by a film.

【0017】位相差板は、例えば各種波長板や液晶層の
複屈折による着色や視角等の補償を目的としたものなど
の使用目的に応じた適宜な位相差を有するものであって
よく、2種以上の位相差板を積層して位相差等の光学特
性を制御したものなどであってもよい。
The retardation plate may have an appropriate retardation in accordance with the intended use, for example, various wavelength plates or those for the purpose of compensating the viewing angle or the like by coloring the birefringence of the liquid crystal layer. A structure in which optical characteristics such as retardation are controlled by laminating more than two kinds of retardation plates may be used.

【0018】光学部材は、上記した楕円偏光板や反射型
偏光板や位相差板の積層体の如く、2層又は3層以上の
光学層を積層したものからなっていてもよい。従って反
射型偏光板と位相差板を組合せたものや偏光板と補償用
の位相差板を組合せたものなどであってもよい。
The optical member may be formed by laminating two or three or more optical layers, such as a laminate of the above-mentioned elliptically polarizing plate, reflection type polarizing plate and retardation plate. Therefore, a combination of a reflective polarizing plate and a retardation plate or a combination of a polarizing plate and a compensating retardation plate may be used.

【0019】2層又は3層以上の光学層を積層した光学
部材は、液晶表示装置等の製造過程で順次別個に積層す
る方式にても形成しうるものであるが、予め積層して光
学部材としたものは、品質の安定性や組立作業性等に優
れて液晶表示装置などの製造効率を向上させうる利点が
ある。
The optical member in which two or three or more optical layers are laminated can be formed by a method in which the optical members are sequentially laminated separately in a manufacturing process of a liquid crystal display device or the like. The method described above has an advantage in that it is excellent in quality stability, assembling workability, and the like, and can improve manufacturing efficiency of a liquid crystal display device and the like.

【0020】光学部材の表面保護フィルムにて接着カバ
ーする側の最表面を形成する低酸素層は、表面保護フィ
ルムの接着力の経時上昇を抑制することを目的とし、元
素比率に基づいて酸素原子が35%以下で、かつ炭素原
子が60%以上の物質にて形成される。
The low oxygen layer, which forms the outermost surface of the optical member on the side covered with the surface protective film with the adhesive cover, has the purpose of suppressing an increase in the adhesive force of the surface protective film over time. Is formed of a substance having 35% or less and 60% or more of carbon atoms.

【0021】前記の酸素原子が35%を超え、炭素原子
が60%未満の物質では前記接着力の経時上昇の抑制効
果に乏しい。当該接着力の経時上昇の抑制の点より好ま
しい低酸素層は、酸素原子が33%以下、就中30%以
下で、炭素原子が63%以上、就中65%以上の物質か
らなるものである。
The above-mentioned substance in which the oxygen atom exceeds 35% and the carbon atom is less than 60% has a poor effect of suppressing the increase in the adhesive force with time. The low oxygen layer, which is preferable from the viewpoint of suppressing the increase of the adhesive force with time, is composed of a substance containing 33% or less, particularly 30% or less of oxygen atoms, 63% or more, and especially 65% or more of carbon atoms. .

【0022】従って低酸素層は、酸素原子の含有率が3
5重量%以下で、炭素原子の含有率が60重量%以上の
分子組成を有する適宜な物質にて形成することができ
る。低酸素層は、上記の如く光学部材の表面保護フィル
ムにて接着カバーする側の最表面にあればよい。
Therefore, the oxygen content of the low oxygen layer is 3%.
It can be formed of an appropriate substance having a molecular composition of 5% by weight or less and a carbon atom content of 60% by weight or more. The low oxygen layer may be on the outermost surface of the optical member on the side covered with the surface protective film as described above.

【0023】よって低酸素層は、光学部材の最表面を形
成する上記した偏光板や位相差板等の光学層として形成
されていてもよいし、光学部材の最表面にコート方式や
転写方式等の適宜な方式による付加層として形成されて
いてもよい。その付加方式による場合には、上記した元
素比率を満足する透明性に優れる物質が光学部材の光学
特性の維持などの点より好ましく用いることができる。
Therefore, the low oxygen layer may be formed as an optical layer such as the above-mentioned polarizing plate or retardation plate which forms the outermost surface of the optical member, or may be formed on the outermost surface of the optical member by a coating method, a transfer method or the like. May be formed as an additional layer by an appropriate method. In the case of the addition method, a substance having excellent transparency that satisfies the above element ratio can be preferably used from the viewpoint of maintaining the optical characteristics of the optical member.

【0024】また前記の付加方式による低酸素層の場
合、光透過率の低下やヘイズの上昇等を防止して光学部
材の光学特性を高度に維持する点などより薄い厚さ、就
中5μm以下、特に1μm以下の厚さの低酸素層とするこ
とが好ましい。付加方式による低酸素層は、表面保護フ
ィルムを剥離除去する際にその表面保護フィルムと共に
光学部材より除去されるものであってもよいし、光学部
材に残存するものであってもよい。
In the case of the low-oxygen layer formed by the above-mentioned addition method, the thickness is thinner, for example, 5 μm or less, in order to prevent a decrease in light transmittance or an increase in haze and maintain a high optical characteristic of the optical member. It is particularly preferable to form a low oxygen layer having a thickness of 1 μm or less. The low oxygen layer by the addition method may be removed from the optical member together with the surface protective film when the surface protective film is peeled off, or may remain on the optical member.

【0025】一般には除去、不除去による低酸素層の残
存状態のバラツキによる光学部材の光学特性への影響を
防止する点などより、例えばエチレン・酢酸ビニル共重
合体の如く光学部材の表面に強力に接着して、表面保護
フィルムを剥離除去する際に光学部材より除去されない
で良好に残存する付加方式の低酸素層であることが好ま
しい。
In general, the surface of an optical member such as an ethylene-vinyl acetate copolymer is strongly applied to prevent the influence on the optical characteristics of the optical member due to the variation in the remaining state of the low oxygen layer due to removal or non-removal. It is preferable that the low-oxygen layer is an addition type low-oxygen layer which adheres to the surface protection film and remains well without being removed from the optical member when the surface protection film is peeled off.

【0026】従ってかかる残存を目的とする場合にはセ
パレータに付与する剥離コートの如く支持基材より剥離
して粘着層側に移着しやすいものは、上記の元素比率を
満足しても好ましくない。なお上記の如く低酸素層は、
光学部材の表面保護フィルムにて接着カバーする側の最
表面を形成するものであることより、光学部材の片側又
は表裏両側の最表面として形成しうる。
Therefore, in the case where such a residue is intended, a material such as a release coat applied to the separator which is easily peeled from the supporting substrate and transferred to the adhesive layer side is not preferable even if the above element ratio is satisfied. . In addition, as described above, the low oxygen layer
Since the outermost surface of the optical member on the side covered with the surface protection film is formed, the optical member can be formed as the outermost surface on one side or both sides of the optical member.

【0027】本発明による光学部材は、上記したように
必要に応じ図例の如く光学部材2の低酸素層21を表面
保護フィルム1にて接着カバーした形態、あるいは更に
光学部材の他面に露出面がセパレータ4にて仮着カバー
された粘着層3を設けた形態などとして加工や輸送等に
供される。
As described above, the optical member according to the present invention has a form in which the low oxygen layer 21 of the optical member 2 is adhered and covered with the surface protection film 1 as shown in the drawing, or is further exposed to the other surface of the optical member. The surface is provided for processing, transportation, and the like as a form in which the adhesive layer 3 whose surface is temporarily covered with the separator 4 is provided.

【0028】前記の表面保護フィルムとしては通例、上
記した如く保護基材に粘着層を設けてその保護基材を粘
着層と共に光学部材より剥離除去できるようにしたもの
が用いられる。図1において11が保護基材、12が粘
着層である。一方、光学部材にセパレータと共に設ける
粘着層は、液晶セル等の他部材と接着するためのもので
あり、セパレータを剥離除去する際にはその粘着層が光
学部材側に残存するように設けられる。
As the above-mentioned surface protective film, there is usually used a film in which an adhesive layer is provided on a protective substrate as described above so that the protective substrate can be peeled off from the optical member together with the adhesive layer. In FIG. 1, 11 is a protective substrate, and 12 is an adhesive layer. On the other hand, the adhesive layer provided on the optical member together with the separator is for bonding to another member such as a liquid crystal cell, and is provided so that the adhesive layer remains on the optical member side when the separator is peeled off.

【0029】前記した表面保護フィルムの粘着層や他部
材接着用の粘着層の形成には、例えばアクリル系重合体
やシリコーン系ポリマー、ポリエステルやポリウレタ
ン、ポリアミドやポリエーテル、フッ素系やゴム系など
の適宜なポリマーをベースポリマーとする粘着性物質や
粘着剤を用いることができ、特に限定はない。就中、他
部材接着用の粘着層の形成には、アクリル系粘着剤の如
く光学的透明性に優れ、適度な濡れ性と凝集性と接着性
の粘着特性を示して、耐候性や耐熱性などに優れるもの
が好ましく用いうる。
For forming the adhesive layer of the surface protective film and the adhesive layer for bonding other members, for example, acrylic polymer, silicone polymer, polyester, polyurethane, polyamide, polyether, fluorine-based, rubber-based, etc. An adhesive substance or an adhesive having an appropriate polymer as a base polymer can be used, and there is no particular limitation. Above all, for the formation of the adhesive layer for bonding other components, it has excellent optical transparency like acrylic adhesive, shows appropriate wettability, cohesiveness and adhesive adhesive properties, weather resistance and heat resistance Those having excellent properties can be preferably used.

【0030】また上記に加えて他部材接着用の粘着層
は、吸湿による発泡現象や剥がれ現象の防止、熱膨張差
等による光学特性の低下や液晶セルの反り防止、ひいて
は高品質で耐久性に優れる液晶表示装置の形成性などの
点より、吸湿率が低くて耐熱性に優れるものにて形成さ
れていることが好ましい。
In addition to the above, the pressure-sensitive adhesive layer for bonding other members can prevent a foaming phenomenon and a peeling phenomenon due to moisture absorption, prevent a decrease in optical characteristics due to a difference in thermal expansion, prevent a liquid crystal cell from warping, and provide high quality and durability. From the viewpoint of excellent formability of a liquid crystal display device, it is preferable that the liquid crystal display device is formed of a material having a low moisture absorption rate and excellent heat resistance.

【0031】粘着層は、例えば天然物や合成物の樹脂
類、就中、粘着性付与樹脂、ガラス繊維やガラスビー
ズ、金属粉やその他の無機粉末等からなる充填剤や顔
料、着色剤や酸化防止剤などの粘着層に添加されること
のある適宜な添加剤を含有していてもよい。また他部材
接着用の粘着層は、微粒子を含有して光拡散性を示すも
のなどであってもよい。
The adhesive layer is made of, for example, natural or synthetic resins, especially, tackifier resins, glass fibers and glass beads, fillers and pigments made of metal powders and other inorganic powders, coloring agents and oxidizing agents. It may contain an appropriate additive such as an inhibitor which may be added to the adhesive layer. Further, the pressure-sensitive adhesive layer for bonding other members may be one containing fine particles and exhibiting light diffusivity.

【0032】保護基材又は光学部材への粘着層の付設
は、適宜な方式で行いうる。ちなみにその例としては、
例えばトルエンや酢酸エチル等の適宜な溶剤の単独物又
は混合物からなる溶媒に粘着性物質ないしその組成物を
溶解又は分散させて10〜40重量%程度の粘着剤液を
調製し、それを流延方式や塗工方式等の適宜な展開方式
で保護基材又は光学部材の上に直接付設する方式、ある
いは前記に準じセパレータ上に粘着層を形成してそれを
保護基材又は光学部材の上に移着する方式などがあげら
れる。
The attachment of the adhesive layer to the protective substrate or the optical member can be performed by an appropriate method. By the way, as an example,
For example, an adhesive substance or a composition thereof is dissolved or dispersed in a solvent composed of an appropriate solvent alone or a mixture of appropriate solvents such as toluene and ethyl acetate to prepare an adhesive liquid of about 10 to 40% by weight, and it is cast. A method of directly attaching on a protective substrate or an optical member by an appropriate development method such as a method or a coating method, or forming an adhesive layer on a separator according to the above and forming it on a protective substrate or an optical member. Transfer method and the like.

【0033】粘着層は、異なる組成又は種類等のものの
重畳層として保護基材又は光学部材に設けることもでき
る。粘着層の厚さは、使用目的や接着力などに応じて適
宜に決定でき、一般には1〜500μm、就中5〜20
0μm、特に10〜100μmとされる。なお保護基材又
は光学部材に設ける粘着層は、組成や種類等が同じであ
ってもよいし、異なるものであってもよい。
The pressure-sensitive adhesive layer may be provided on the protective substrate or the optical member as a superposed layer of different compositions or types. The thickness of the pressure-sensitive adhesive layer can be appropriately determined depending on the purpose of use, adhesive strength, and the like, and is generally 1 to 500 μm, preferably 5 to 20 μm.
0 μm, especially 10 to 100 μm. The pressure-sensitive adhesive layer provided on the protective substrate or the optical member may have the same composition or type, or may have a different composition.

【0034】なお表面保護フィルムを形成する保護基材
には、例えばプラスチックフィルムやゴムシート、紙や
布、不織布やネット、発泡シートや金属箔、それらのラ
ミネート体等の従来に準じた適宜な薄葉体を用いること
ができる。保護基材の厚さは、強度等に応じて適宜に決
定でき、一般には500μm以下、就中5〜300μm、
特に10〜200μmとされる。
The protective substrate for forming the surface protective film may be a suitable thin leaf according to the prior art, for example, a plastic film or rubber sheet, paper or cloth, nonwoven fabric or net, foamed sheet or metal foil, or a laminate thereof. The body can be used. The thickness of the protective substrate can be appropriately determined according to the strength and the like, and is generally 500 μm or less, particularly 5 to 300 μm,
In particular, it is 10 to 200 μm.

【0035】一方、粘着層の露出面を仮着カバーするセ
パレータは、粘着層を実用に供するまでの間、その汚染
を防止することなどを目的とする。セパレータの形成
は、前記の保護基材に準じた適宜な薄葉体に、必要に応
じシリコーン系や長鎖アルキル系、フッ素系や硫化モリ
ブデン等の適宜な剥離剤のコートを設ける方式などによ
り行うことができる。
On the other hand, the purpose of the separator for temporarily covering the exposed surface of the adhesive layer is to prevent contamination of the adhesive layer until the adhesive layer is put to practical use. The separator is formed by, for example, providing a suitable thin film according to the above-mentioned protective base material with a coating of a suitable release agent such as a silicone-based or long-chain alkyl-based, fluorine-based or molybdenum sulfide, if necessary. Can be.

【0036】なお本発明において、上記した光学部材を
形成する偏光板や位相差板、透明保護層や粘着層などの
各層は、例えばサリチル酸エステル系化合物やベンゾフ
ェノール系化合物、ベンゾトリアゾール系化合物やシア
ノアクリレート系化合物、ニッケル錯塩系化合物等の紫
外線吸収剤で処理する方式などの適宜な方式により紫外
線吸収能をもたせたものなどであってもよい。
In the present invention, each layer such as a polarizing plate, a retardation plate, a transparent protective layer and an adhesive layer forming the above-mentioned optical member is formed of, for example, a salicylic acid ester compound, a benzophenol compound, a benzotriazole compound or a cyano compound. A material having an ultraviolet absorbing ability by an appropriate method such as a method of treating with an ultraviolet absorbent such as an acrylate compound or a nickel complex salt compound may be used.

【0037】本発明による光学部材は、液晶表示装置等
の各種装置の形成などに好ましく用いることができる。
The optical member according to the present invention can be preferably used for forming various devices such as a liquid crystal display device.

【0038】[0038]

【実施例】実施例1 ポリビニルアルコール系偏光フィルムの両側にポリビニ
ルアルコール系接着層を介してトリアセチルセルロース
フィルムからなる透明保護層を接着した厚さ180μm
の偏光板の片面に、エチレン・酢酸ビニル共重合体の1
重量%酢酸エチル溶液を塗布し乾燥させて厚さ1μm以
下の低酸素層を付設し、その上に厚さ50μmのPET
フィルムに厚さ20μmのアクリル系粘着層を設けてな
る表面保護フィルムを2kgのゴムローラーを一往復さ
せて接着し、光学部材を得た。
EXAMPLE 1 A transparent protective layer made of a triacetyl cellulose film was adhered to both sides of a polyvinyl alcohol-based polarizing film via a polyvinyl alcohol-based adhesive layer to a thickness of 180 μm.
One side of an ethylene-vinyl acetate copolymer
A low-oxygen layer having a thickness of 1 μm or less is provided by applying a weight-% ethyl acetate solution and drying, and a 50 μm-thick PET is formed thereon.
An optical member was obtained by adhering a surface protection film having a 20 μm-thick acrylic adhesive layer to the film by reciprocating a 2 kg rubber roller once.

【0039】比較例 低酸素層を設けずに、トリアセチルセルロースフィルム
(透明保護層)の上に表面保護フィルムを直接接着した
ほかは、実施例1に準じて光学部材を得た。
Comparative Example An optical member was obtained in the same manner as in Example 1 except that a surface protective film was directly adhered on a triacetyl cellulose film (transparent protective layer) without providing a low oxygen layer.

【0040】評価試験 実施例1、比較例で得た光学部材における表面保護フィ
ルムの接着力を接着直後(初期)、及び40℃で150
時間加熱後(経時)について調べた。なお接着力は、1
80度ピール(剥離速度300mm/分)に基づく。
Evaluation Test The adhesive strength of the surface protective film on the optical member obtained in Example 1 and Comparative Example was measured immediately after adhesion (initial stage) and at 150 ° C.
After heating for a period of time (elapsed time), it was examined. The adhesive strength is 1
Based on 80 degree peel (peeling speed 300 mm / min).

【0041】前記の結果を次表に示した。なお表にはエ
チレン・酢酸ビニル共重合体からなる層表面又はトリア
セチルセルロースフィルムからなる層表面のESCAに
よる元素分析にて調べた酸素原子及び炭素原子の元素比
率も示した。 酸素原子 炭素原子 初期接着力 経時接着力 (%) (%) g/50mm g/50mm 実施例1 27 69 30 45 比 較 例 40 55 34 92
The results are shown in the following table. The table also shows the elemental ratios of oxygen atoms and carbon atoms of the surface of the layer made of the ethylene / vinyl acetate copolymer or the surface of the layer made of the triacetyl cellulose film, which were examined by elemental analysis using ESCA. Oxygen atom Carbon atom Initial adhesive strength Adhesive strength with time (%) (%) g / 50 mm g / 50 mm Example 1 27 69 30 45 Comparative Example 40 55 34 92

【図面の簡単な説明】[Brief description of the drawings]

【図1】光学部材例の断面図FIG. 1 is a cross-sectional view of an example of an optical member.

【符号の説明】[Explanation of symbols]

1:表面保護フィルム 11:保護基材 12:粘着層 2:光学部材 21:低酸素層 3:粘着層 4:セパレータ 1: Surface protective film 11: Protective substrate 12: Adhesive layer 2: Optical member 21: Low oxygen layer 3: Adhesive layer 4: Separator

───────────────────────────────────────────────────── フロントページの続き (72)発明者 済木 雄二 大阪府茨木市下穂積1丁目1番2号日東電 工株式会社内 (72)発明者 正田 位守 大阪府茨木市下穂積1丁目1番2号日東電 工株式会社内 Fターム(参考) 2H049 BA02 BA04 BA06 BA07 BB03 BB23 BB28 BB33 BB43 BB54 2K009 AA12 BB11 CC03 CC14 CC34 CC42 DD01 DD02  ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yuji Shiki 1-1-2 Shimohozumi, Ibaraki City, Osaka Prefecture Inside Nitto Denko Corporation (72) Inventor Tomomori Masada 1-1-1, Shimohozumi, Ibaraki City, Osaka Prefecture No.2 Nitto Denko Corporation F term (reference) 2H049 BA02 BA04 BA06 BA07 BB03 BB23 BB28 BB33 BB43 BB54 2K009 AA12 BB11 CC03 CC14 CC34 CC42 DD01 DD02

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 少なくとも片側の最表面が、元素比率に
基づいて酸素原子が35%以下で、かつ炭素原子が60
%以上である低酸素層からなることを特徴とする光学部
材。
At least one outermost surface has an oxygen atom of 35% or less and a carbon atom of 60% based on the element ratio.
%, Which comprises a low oxygen layer having a concentration of not less than 10%.
【請求項2】 請求項1において、低酸素層を接着カバ
ーする表面保護フィルムを有し、光学部材の他面に露出
面がセパレータにて仮着カバーされた粘着層を有する光
学部材。
2. The optical member according to claim 1, further comprising a surface protection film for adhesively covering the low oxygen layer, and an adhesive layer having an exposed surface temporarily covered with a separator on the other surface of the optical member.
【請求項3】 請求項1又は2において、光学部材が少
なくとも偏光板又は位相差板を有するものである光学部
材。
3. The optical member according to claim 1, wherein the optical member has at least a polarizing plate or a retardation plate.
JP11071441A 1999-03-17 1999-03-17 Optical member Pending JP2000266933A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11071441A JP2000266933A (en) 1999-03-17 1999-03-17 Optical member

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11071441A JP2000266933A (en) 1999-03-17 1999-03-17 Optical member

Publications (1)

Publication Number Publication Date
JP2000266933A true JP2000266933A (en) 2000-09-29

Family

ID=13460641

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11071441A Pending JP2000266933A (en) 1999-03-17 1999-03-17 Optical member

Country Status (1)

Country Link
JP (1) JP2000266933A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004005102A (en) * 2002-05-31 2004-01-08 Gunze Ltd Touch panel
JP2013130895A (en) * 2013-04-03 2013-07-04 Mitsubishi Rayon Co Ltd Molded body with protective film
JP2014123068A (en) * 2012-12-21 2014-07-03 Dainippon Printing Co Ltd Transfer body for circular polarizing plate, circular polarizing plate, image display unit, manufacturing method of transfer body for circular polarizing plate and manufacturing method of circular polarizing plate
JP2015163995A (en) * 2015-06-15 2015-09-10 三菱レイヨン株式会社 Compact with protective film

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004005102A (en) * 2002-05-31 2004-01-08 Gunze Ltd Touch panel
JP4517218B2 (en) * 2002-05-31 2010-08-04 グンゼ株式会社 Touch panel
JP2014123068A (en) * 2012-12-21 2014-07-03 Dainippon Printing Co Ltd Transfer body for circular polarizing plate, circular polarizing plate, image display unit, manufacturing method of transfer body for circular polarizing plate and manufacturing method of circular polarizing plate
JP2013130895A (en) * 2013-04-03 2013-07-04 Mitsubishi Rayon Co Ltd Molded body with protective film
JP2015163995A (en) * 2015-06-15 2015-09-10 三菱レイヨン株式会社 Compact with protective film

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