JP2020101814A5 - - Google Patents

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JP2020101814A5
JP2020101814A5 JP2020022109A JP2020022109A JP2020101814A5 JP 2020101814 A5 JP2020101814 A5 JP 2020101814A5 JP 2020022109 A JP2020022109 A JP 2020022109A JP 2020022109 A JP2020022109 A JP 2020022109A JP 2020101814 A5 JP2020101814 A5 JP 2020101814A5
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Japan
Prior art keywords
adhesive layer
sensitive adhesive
pressure
polarizing film
double
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JP2020022109A
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Japanese (ja)
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JP7149975B2 (en
JP2020101814A (en
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Priority claimed from JP2020022109A external-priority patent/JP7149975B2/en
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Publication of JP2020101814A5 publication Critical patent/JP2020101814A5/ja
Priority to JP2021074619A priority patent/JP2021140160A/en
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Claims (13)

画像表示装置において最も視認側に設けられる偏光フィルム並びに当該偏光フィルムの視認側に配置される粘着剤層Ａおよび前記粘着剤層Ａの反対側に配置される粘着剤層Ｂを有し、前記粘着剤層ＡにセパレータＳＡ、前記粘着剤層ＢにセパレータＳＢを備えている両面粘着剤層付偏光フィルムであって、
前記偏光フィルムは、厚み１５μｍ以下の偏光子の片側にのみ透明保護フィルムを有する片保護偏光フィルムであり、前記偏光子の側に粘着剤層Ｂが配置されており、
前記粘着剤層Ａの厚みは２５μｍ以上であり、
前記粘着剤層Ｂの厚みは２５μｍ以下であり、前記片保護偏光フィルムの偏光子に、１５μｍ以下の機能層を介して貼り合されていることを特徴とすることをする両面粘着剤層付偏光フィルム。 In the image display device, the polarizing film is provided on the most visible side, the pressure-sensitive adhesive layer A disposed on the visible side of the polarizing film, and the pressure-sensitive adhesive layer B disposed on the opposite side of the pressure-sensitive adhesive layer A. A double-sided pressure-sensitive adhesive layer-attached polarizing film comprising a separator SA on the agent layer A and a separator SB on the pressure-sensitive adhesive layer B,
The polarizing film is a one-sided protective polarizing film having a transparent protective film only on one side of a polarizer having a thickness of 15 μm or less, and an adhesive layer B is arranged on the side of the polarizer,
The pressure-sensitive adhesive layer A has a thickness of 25 μm or more,
The thickness of the pressure-sensitive adhesive layer B is Ri der below 25 [mu] m, the polarizer of the piece protective polarizing film, double-sided pressure-sensitive adhesive layer to that characterized that you have been bonded together through the following functional layer 15μm Polarizing film. 前記粘着剤層Ｂは、前記片保護偏光フィルムの偏光子に、直接、貼り合されていることを特徴とする請求項１記載の両面粘着剤層付偏光フィルム。 The double-sided pressure-sensitive adhesive layer-attached polarizing film according to claim 1, wherein the pressure-sensitive adhesive layer B is directly attached to the polarizer of the one-sided protective polarizing film. 前記粘着剤層Ａは、２３℃の貯蔵弾性率が０．０５ＭＰａ以上であることを特徴とする請求項１または２記載の両面粘着剤層付偏光フィルム。 The pressure-sensitive adhesive layer A polarizing film double-sided pressure-sensitive adhesive layer according to claim 1 or 2, wherein the storage elastic modulus of 23 ° C. is not less than 0.05 MPa. 前記粘着剤層Ａは端部の少なくとも一部が、前記片保護偏光フィルムの面の端辺よりも内側にあることを特徴とする請求項１〜３のいずれかに記載の両面粘着剤層付き偏光フィルム。 The pressure-sensitive adhesive layer A is at least a portion of the end, with the double-sided pressure-sensitive adhesive layer according to any one of claims 1 to 3, characterized in that on the inside than the edge sides of the surface of the piece protective polarizing film Polarizing film. 前記セパレータＳＡの剥離力が、前記セパレータＳＢの剥離力より高いことを特徴とする請求項１〜４のいずれかに記載の両面粘着剤層付偏光フィルム。 The release force of the separator SA is attached polarizing film sided pressure-sensitive adhesive layer according to any one of claims 1 to 4, wherein the higher than the release force of the separator SB. 前記セパレータＳＡは、厚みが４０μｍ以上であり、かつ、セパレータ剥離力が０．１Ｎ／５０ｍｍ以上であることを特徴とする請求項１〜５のいずれかに記載の両面粘着剤層付偏光フィルム。 The separator SA has a thickness is not less 40μm or more, and a polarizing film double-sided pressure-sensitive adhesive layer according to any one of claims 1 to 5, wherein the separator peeling force is 0.1 N / 50 mm or more. 前記粘着剤層Ａが積層される前記片保護偏光フィルムの透明保護フィルムは易接着処理が施されていることを特徴とする請求項１〜６のいずれかに記載の両面粘着剤層付偏光フィルム。 Transparent protective film-attached polarizing film sided pressure-sensitive adhesive layer according to any one of claims 1 to 6, characterized in that the easy-adhesion treatment is applied in the piece protective polarizing film in which the pressure-sensitive adhesive layer A is laminated .. 前記粘着剤層Ａおよび前記粘着剤層Ｂは、いずれも、アルキル（メタ）アクリレートをモノマー単位として含有する（メタ）アクリル系ポリマーをベースポリマーとするアクリル系粘着剤により形成されており、
前記粘着剤層Ａに係る（メタ）アクリル系ポリマーは、モノマー単位として、２−エチルヘキシルアクリレートを３０重量％以上含み、
前記粘着剤層Ｂに係る（メタ）アクリル系ポリマーは、モノマー単位として、ブチルアクリレートを最も多く含むことを特徴とする請求項１〜７のいずれかに記載の両面粘着剤層付偏光フィルム。 Each of the pressure-sensitive adhesive layer A and the pressure-sensitive adhesive layer B is formed of an acrylic pressure-sensitive adhesive having a (meth)acrylic polymer containing an alkyl (meth)acrylate as a monomer unit as a base polymer,
The (meth)acrylic polymer relating to the pressure-sensitive adhesive layer A contains 30 wt% or more of 2-ethylhexyl acrylate as a monomer unit,
Wherein according to the pressure-sensitive adhesive layer B (meth) acrylic polymer, as a monomer unit, polarizing film double-sided pressure-sensitive adhesive layer according to any one of claims 1 to 7, characterized in that the highest concentration of butyl acrylate. 前記粘着剤層Ａおよび前記粘着剤層Ｂは、いずれも、アルキル（メタ）アクリレートをモノマー単位として含有する（メタ）アクリル系ポリマーをベースポリマーとするアクリル系粘着剤により形成されており、
前記粘着剤層Ａおよび前記粘着剤層Ｂに係る（メタ）アクリル系ポリマーのいずれか少なくとも一方には、モノマー単位として、（メタ）アクリル酸および環状窒素含有モノマーのいずれか少なくとも１つを含んでいることを特徴とする請求項１〜８のいずれかに記載の両面粘着剤層付き偏光フィルム。 Each of the pressure-sensitive adhesive layer A and the pressure-sensitive adhesive layer B is formed of an acrylic pressure-sensitive adhesive having a (meth)acrylic polymer containing an alkyl (meth)acrylate as a monomer unit as a base polymer,
At least one of the (meth)acrylic polymers relating to the pressure-sensitive adhesive layer A and the pressure-sensitive adhesive layer B contains at least one of (meth)acrylic acid and a cyclic nitrogen-containing monomer as a monomer unit. polarizing film with double-sided pressure-sensitive adhesive layer according to any one of claims 1 to 8, characterized in that there. 前記粘着剤層Ａは、活性エネルギー線の照射により貯蔵弾性率が大きくなるものであることを特徴とする請求項１〜９のいずれかに記載の両面粘着剤層付偏光フィルム。 The pressure-sensitive adhesive layer A polarizing film double-sided pressure-sensitive adhesive layer according to any one of claims 1 to 9, characterized in that the irradiation of the active energy beam in which the storage elastic modulus increases. 前記粘着剤層Ａが紫外線吸収剤を含んでいることを特徴とする請求項１〜１０のいずれかに記載の両面粘着剤層付偏光フィルム。 Polarizing film double-sided pressure-sensitive adhesive layer according to any one of claims 1 to 10, characterized in that the pressure-sensitive adhesive layer A contains an ultraviolet absorber. 少なくとも１枚の両面粘着剤層付偏光フィルムを有する画像表示装置であって、
画像表示装置において最も視認側に設けられる両面粘着剤層付偏光フィルムが、請求項１〜１１のいずれかに記載の両面粘着剤層付偏光フィルムであり、
前記両面粘着剤層付偏光フィルムの粘着剤層Ａが視認側に、粘着剤層Ｂが表示部側になるように配置されていることを特徴とする画像表示装置。 An image display device having at least one polarizing film with a double-sided adhesive layer,
Most polarizing film double-sided pressure-sensitive adhesive layer provided on the viewing side in the image display device, a polarizing film with double-sided pressure-sensitive adhesive layer according to any one of claims 1 to 11
An image display device characterized in that the pressure-sensitive adhesive layer A of the polarizing film with a double-sided pressure-sensitive adhesive layer is arranged on the viewing side and the pressure-sensitive adhesive layer B is arranged on the display unit side. インセル型またはオンセル型のタッチセンサー内蔵液晶表示装置に適用されることを特徴とする請求項１２記載の画像表示装置。
13. The image display device according to claim 12, which is applied to an in-cell type or on-cell type liquid crystal display device with a built-in touch sensor.
JP2020022109A 2020-02-13 2020-02-13 Polarizing film with double-sided adhesive layer and image display device Active JP7149975B2 (en)

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JP2021074619A JP2021140160A (en) 2020-02-13 2021-04-27 Polarization film with adhesive layer on both sides, and image display device

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JP2020101814A5 true JP2020101814A5 (en) 2020-08-13
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