TW202327885A - Optical multilayer body, image display panel and image display device - Google Patents

Optical multilayer body, image display panel and image display device Download PDF

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TW202327885A
TW202327885A TW111140834A TW111140834A TW202327885A TW 202327885 A TW202327885 A TW 202327885A TW 111140834 A TW111140834 A TW 111140834A TW 111140834 A TW111140834 A TW 111140834A TW 202327885 A TW202327885 A TW 202327885A
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optical laminate
polymer
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adhesive sheet
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木村智之
小野寬大
藤田雅人
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日商日東電工股份有限公司
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Publication of TW202327885A publication Critical patent/TW202327885A/en

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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/30Polarising elements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B7/00Automatic or semi-automatic turning-machines with a single working-spindle, e.g. controlled by cams; Equipment therefor; Features common to automatic and semi-automatic turning-machines with one or more working-spindles
    • B23B7/12Automatic or semi-automatic machines for turning of workpieces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02Physical, chemical or physicochemical properties
    • B32B7/023Optical properties
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02Non-macromolecular additives
    • C09J11/06Non-macromolecular additives organic
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/04Homopolymers or copolymers of esters
    • C09J133/14Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J201/00Adhesives based on unspecified macromolecular compounds
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00Adhesives in the form of films or foils
    • C09J7/30Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/38Pressure-sensitive adhesives [PSA]

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Polarising Elements (AREA)
  • Adhesive Tapes (AREA)

Abstract

The present invention provides an optical multilayer body which comprises an adhesive sheet having a sufficiently low surface resistance, and which is suitable for suppression of unwanted coloring of light from an image display device even in cases where the optical multilayer body has been in a high temperature environment. An optical multilayer body 10A according to the present invention comprises: an adhesive sheet 1 that is formed from an adhesive composition containing a polymer (A); and a polarizing plate 2. The polymer (A) has a relative dielectric constant of 5.0 or more at a frequency of 100 kHz. The adhesive sheet 1 has a surface resistance of 1.0 * 1010 [Omega]/□ or less. The haze as measured by the test method described below is 1.0% or less. Test method: A sample for evaluation is formed by sandwiching the optical multilayer body 10A between two alkali-free glass sheets. The haze of the sample for evaluation is measured after heating the sample for evaluation at 105 DEG C for 250 hours.

Description

光學積層體、影像顯示面板及影像顯示裝置Optical laminate, image display panel, and image display device

本發明涉及光學積層體、影像顯示面板及影像顯示裝置。The present invention relates to an optical laminate, an image display panel and an image display device.

近年來,以液晶顯示裝置及電致發光(EL)顯示裝置(例如有機EL顯示裝置、無機EL顯示裝置)為代表之影像顯示裝置急速普及。該等各種影像顯示裝置例如具有液晶單元、EL發光元件等影像顯示單元與光學積層體之積層結構,且該光學積層體包含偏光板及黏著片。 黏著片主要用於接合光學積層體所含之薄膜間或接合影像顯示單元與光學積層體。 In recent years, image display devices represented by liquid crystal display devices and electroluminescent (EL) display devices (such as organic EL display devices and inorganic EL display devices) have been rapidly popularized. These various image display devices have, for example, a laminated structure of an image display unit such as a liquid crystal cell and an EL light-emitting element, and an optical layered body, and the optical layered body includes a polarizing plate and an adhesive sheet. Adhesive sheets are mainly used to join the films contained in the optical laminate or to join the image display unit and the optical laminate.

影像顯示裝置在其製造時、例如在透過黏著片將光學積層體貼合至影像顯示單元時、或在使用時例如在使用者觸碰影像顯示裝置時,會產生靜電。影像顯示裝置若因該靜電而帶電,便可能發生顯示不良等問題。而專利文獻1中便揭示了為了防止影像顯示裝置靜電,而於黏著片中添加導電劑(抗靜電劑)。專利文獻1中,黏著片其表面電阻值係調節在1.34×10 10Ω/□~4.49×10 10Ω/□之範圍內。 先前技術文獻 專利文獻 When an image display device is manufactured, for example, when the optical laminate is bonded to the image display unit through an adhesive sheet, or when it is used, for example, when a user touches the image display device, static electricity is generated. If the image display device is charged by the static electricity, problems such as display failure may occur. Patent Document 1 discloses that a conductive agent (antistatic agent) is added to the adhesive sheet in order to prevent static electricity in the image display device. In Patent Document 1, the surface resistance of the adhesive sheet is adjusted within the range of 1.34×10 10 Ω/□ to 4.49×10 10 Ω/□. Prior Art Documents Patent Documents

專利文獻1:日本專利特開2020-180305號公報Patent Document 1: Japanese Patent Laid-Open No. 2020-180305

發明欲解決之課題 根據本發明人等之研討,在特別容易發生靜電之環境(例如像在車輛內部這種周圍存在其他電子機器的環境)下使用影像顯示裝置時,為了充分防止影像顯示裝置因靜電造成顯示不良,必須將黏著片之表面電阻值調節成較低的值。但,根據本發明人等之研討,若將黏著片之表面電阻值節成較低的值,在歷經高溫環境之情況下,有來自影像顯示裝置之光產生不需要之著色、尤其是產生綠色著色的傾向。 The problem to be solved by the invention According to the research of the inventors of the present invention, when using an image display device in an environment where static electricity is particularly prone to occur (for example, an environment such as inside a vehicle where there are other electronic devices around), in order to fully prevent the display failure of the image display device due to static electricity, The surface resistance value of the adhesive sheet must be adjusted to a lower value. However, according to the research of the inventors of the present invention, if the surface resistance value of the adhesive sheet is adjusted to a lower value, the light from the image display device may cause unnecessary coloring, especially green coloring, under the condition of going through a high temperature environment. Tendency to color.

因此,本發明目的在於供一種光學積層體,其包含表面電阻值夠低的黏著片,且即使在歷經高溫環境之情況下,仍適於抑制來自影像顯示裝置之光產生不需要之著色。Therefore, an object of the present invention is to provide an optical laminate comprising an adhesive sheet having a sufficiently low surface resistance and suitable for suppressing unwanted coloration of light from an image display device even when exposed to a high-temperature environment.

用以解決課題之手段 本發明提供一種光學積層體,包含黏著片與偏光板,且該黏著片係由含聚合物(A)之黏著劑組成物形成; 前述聚合物(A)在頻率100kHz下之相對介電常數為5.0以上; 前述黏著片之表面電阻值為1.0×10 10Ω/□以下; 該光學積層體藉由下述試驗方法測定之霧度為1.0%以下。 試驗方法:以2片無鹼玻璃包夾前述光學積層體,製作評估用試樣。將前述評估用試樣在105℃下加熱250小時後,測定該評估用試樣之霧度。 Means for Solving the Problems The present invention provides an optical laminate comprising an adhesive sheet and a polarizing plate, and the adhesive sheet is formed of an adhesive composition containing a polymer (A); The relative dielectric constant is 5.0 or more; the surface resistance value of the aforementioned adhesive sheet is 1.0×10 10 Ω/□ or less; the haze of the optical laminate measured by the following test method is 1.0% or less. Test method: The aforementioned optical laminate was sandwiched between two sheets of non-alkali glass to prepare a sample for evaluation. After heating the said evaluation sample at 105 degreeC for 250 hours, the haze of this evaluation sample was measured.

並且,本發明提供一種影像顯示面板,其具備上述光學積層體。Furthermore, the present invention provides an image display panel including the above-mentioned optical layered body.

並且,本發明提供一種影像顯示裝置,其具備上述影像顯示面板。Furthermore, the present invention provides an image display device including the above-mentioned image display panel.

發明效果 根據本發明可提供一種光學積層體,其包含表面電阻值夠低的黏著片,且即使在歷經高溫環境之情況下,仍適於抑制來自影像顯示裝置之光產生不需要之著色。 Invention effect According to the present invention, it is possible to provide an optical laminate comprising an adhesive sheet having a sufficiently low surface resistance value and suitable for suppressing unnecessary coloration of light from an image display device even when exposed to a high-temperature environment.

以下詳細說明本發明,惟本發明不受以下實施形態限定,可在不脫離本發明要旨之範圍內任意變更並實施。The present invention will be described in detail below, but the present invention is not limited by the following embodiments, and can be arbitrarily changed and implemented without departing from the gist of the present invention.

[光學積層體之實施形態] 於圖1顯示本實施形態之光學積層體之一例。圖1之光學積層體10A包含黏著片1與偏光板2。黏著片1與偏光板2係相互積層。光學積層體10A可透過黏著片1與對象物(例如影像顯示面板)貼合。光學積層體10A可作為附黏著片之偏光板使用。 [Example of Optical Laminate] An example of the optical layered body of this embodiment is shown in FIG. 1 . The optical laminate 10A in FIG. 1 includes an adhesive sheet 1 and a polarizing plate 2 . The adhesive sheet 1 and the polarizing plate 2 are laminated together. The optical laminate 10A can be bonded to an object (such as an image display panel) through the adhesive sheet 1 . The optical laminate 10A can be used as a polarizing plate with an adhesive sheet attached.

光學積層體10A中,藉由下述試驗方法1測定之霧度H為1.0%以下。此外,光學積層體包含剝離襯材時,係在剝離剝離襯材後進行下述試驗方法1。 試驗方法1:以2片無鹼玻璃包夾光學積層體10A,製作評估用試樣。將評估用試樣在105℃下加熱250小時後,測定該評估用試樣之霧度H。 In the optical layered body 10A, the haze H measured by the following test method 1 is 1.0% or less. In addition, when the optical layered body includes a release liner, the following test method 1 is performed after peeling off the release liner. Test method 1: The optical layered body 10A was sandwiched between two sheets of non-alkali glass to prepare a sample for evaluation. After heating the sample for evaluation at 105 degreeC for 250 hours, the haze H of the sample for evaluation was measured.

以下,詳細說明試驗方法1。首先,如圖2所示,透過黏著片1將光學積層體10A與無鹼玻璃20A貼合。所用之光學積層體10A之尺寸例如為長50mm×寬50mm。接著,於光學積層體10A之與黏著片1為相反側的表面上、典型上為於偏光板2之表面上,形成由光學透明黏著劑(OCA:Optical Clear Adhesive)構成之透明黏著片21。透明黏著片21係使用試驗方法1中可無視對霧度H值之影響者。黏著片21之具體例可舉日東電工公司製LUCIACS CS98210U。接著,透過透明黏著片21將光學積層體10A與無鹼玻璃20B貼合。藉此,可獲得光學積層體10A被2片無鹼玻璃20包夾之評估用試樣15。此外,無鹼玻璃20係實質上不含鹼成分(鹼金屬氧化物)的玻璃,詳細來說玻璃中之鹼成分之重量比率例如為1000ppm以下,進一步為500ppm以下。無鹼玻璃20例如為板狀,具有0.5mm以上之厚度。無鹼玻璃20係使用試驗方法1中可無視對霧度H值之影響者。Hereinafter, Test Method 1 will be described in detail. First, as shown in FIG. 2 , the optical layered body 10A and the alkali-free glass 20A are bonded together through the adhesive sheet 1 . The size of the optical layered body 10A to be used is, for example, 50 mm in length x 50 mm in width. Next, a transparent adhesive sheet 21 made of an optically clear adhesive (OCA: Optical Clear Adhesive) is formed on the surface of the optical laminate 10A opposite to the adhesive sheet 1 , typically on the surface of the polarizing plate 2 . The transparent adhesive sheet 21 is one that can ignore the influence on the haze H value in the test method 1. As a specific example of the adhesive sheet 21, LUCIACS CS98210U manufactured by Nitto Denko Co., Ltd. can be mentioned. Next, the optical layered body 10A and the alkali-free glass 20B are bonded together through the transparent adhesive sheet 21 . Thereby, the evaluation sample 15 in which the optical layered body 10A was sandwiched by the two non-alkali glass 20 was obtained. Moreover, the alkali-free glass 20 is glass which does not contain an alkali component (alkali metal oxide) substantially, Specifically, the weight ratio of the alkali component in glass is 1000 ppm or less, and further is 500 ppm or less. The alkali-free glass 20 is plate-shaped, for example, and has a thickness of 0.5 mm or more. Alkali-free glass 20 is the one that can ignore the influence on the haze H value in test method 1.

接著,將評估用試樣15配置在105℃之加熱環境下250小時後,將評估用試樣15自然冷卻至室溫(例如23℃)為止。針對該評估用試樣15,依循日本產業規格(舊日本工業規格;JIS)K7136:2000測定霧度H。霧度H可使用市售之霧度計(例如村上色彩技術研究所製之HM-150N)來測定。測定霧度H時,係使來自光源之光從無鹼玻璃20A側入射評估用試樣15。Next, after placing the sample 15 for evaluation in a heating environment at 105° C. for 250 hours, the sample 15 for evaluation was naturally cooled to room temperature (for example, 23° C.). About the sample 15 for this evaluation, the haze H was measured according to Japanese Industrial Standard (former Japanese Industrial Standard; JIS) K7136:2000. The haze H can be measured using a commercially available haze meter (for example, HM-150N manufactured by Murakami Color Research Laboratory). When measuring haze H, the light from a light source was made to inject the sample 15 for evaluation from the non-alkali glass 20A side.

霧度H宜為0.9%以下,亦可為0.8%以下、0.7%以下、0.6%以下、0.5%以下、0.4%以下、0.38%以下、0.35%以下,更可為0.33%以下。霧度H為1.0%以下之光學積層體10A即使在經過高溫環境之情況下,仍適於抑制來自影像顯示裝置之光產生不需要之著色。霧度H的下限值無特別限定,例如為0.1%。The haze H is preferably less than 0.9%, and may be less than 0.8%, less than 0.7%, less than 0.6%, less than 0.5%, less than 0.4%, less than 0.38%, less than 0.35%, and may be less than 0.33%. The optical layered body 10A having a haze H of 1.0% or less is suitable for suppressing unnecessary coloring of light from an image display device even when exposed to a high-temperature environment. The lower limit of the haze H is not particularly limited, and is, for example, 0.1%.

此外,排除未將評估用試樣15放置於加熱環境下之情況,藉由與試驗方法1相同方法測定之霧度H 0無特別限定,例如為1.0%以下,亦可為0.9%以下、0.8%以下、0.7%以下、0.6%以下、0.5%以下、0.4%以下、0.38%以下、0.35%以下,更可為0.33%以下。霧度H 0的下限值無特別限定,例如為0.1%。 In addition, excluding the case where the sample 15 for evaluation is not placed in a heated environment, the haze H0 measured by the same method as Test Method 1 is not particularly limited, for example, it is 1.0% or less, and can also be 0.9% or less, 0.8 % or less, 0.7% or less, 0.6% or less, 0.5% or less, 0.4% or less, 0.38% or less, 0.35% or less, and even 0.33% or less. The lower limit of the haze H 0 is not particularly limited, and is, for example, 0.1%.

並且,從霧度H減去霧度H 0所得之值(H-H 0)無特別限定,例如為0.5%以下,亦可為0.4%以下、0.3%以下、0.2%以下、0.1%以下、0.08%以下、0.05%以下,更可為0.02%以下。H-H 0之值的下限值例如為-0.05%。 In addition, the value (HH 0 ) obtained by subtracting the haze H 0 from the haze H is not particularly limited, and is, for example, 0.5% or less, and may be 0.4% or less, 0.3% or less, 0.2% or less, 0.1% or less, or 0.08% less than 0.05%, or less than 0.02%. The lower limit of the value of HH 0 is, for example, -0.05%.

在本實施形態中,利用下述試驗方法2測定之透射光之L *a *b *表色系統中的a *值及b *值宜滿足下述關係式(I)及(II)。 試驗方法2:以2片無鹼玻璃包夾光學積層體10A,製作評估用試樣。將評估用試樣在105℃下加熱250小時。準備配置有追加之偏光板的光源(CIE標準光源D65),該追加之偏光板係對光學積層體10A中之前述偏光板2的吸收軸形成正交偏光之關係。使來自光源之光透過追加之偏光板入射相較於偏光板2位在靠黏著片1側之評估用試樣表面。測定透射評估用試樣之透射光之L *a *b *表色系統中的a *值及b *值。 -0.3≦a *≦0.7      (I) -1.5≦b *≦0.5      (II) In this embodiment, the a * value and b * value in the L * a * b * colorimetric system of the transmitted light measured by the following test method 2 should satisfy the following relational formulas (I) and (II). Test method 2: The optical layered body 10A was sandwiched between two sheets of non-alkali glass to prepare a sample for evaluation. The sample for evaluation was heated at 105° C. for 250 hours. A light source (CIE standard light source D65) was prepared in which an additional polarizing plate forming a relationship of crossed polarization with respect to the absorption axis of the aforementioned polarizing plate 2 in the optical laminate 10A was prepared. Let the light from the light source pass through the additional polarizing plate and enter the surface of the evaluation sample on the side closer to the adhesive sheet 1 than the polarizing plate 2 . Measure the a * value and b * value in the L * a * b * colorimetric system of the transmitted light of the sample for transmission evaluation. -0.3≦a * ≦0.7 (I) -1.5≦b * ≦0.5 (II)

以下,詳細說明試驗方法2。首先,藉由與試驗方法1相同之方法,製作評估用試樣15。試驗方法2之評估用試樣15中,光學積層體10A之尺寸例如為長200mm×寬50mm。評估用試樣15中,透明黏著片21及無鹼玻璃20係使用試驗方法2中可無視對透射光之色相之影響者。接著,將評估用試樣15配置在105℃之加熱環境下250小時後,將評估用試樣15自然冷卻至室溫(例如23℃)為止。接著,如圖3所示,準備配置有追加之偏光板22的光源23(CIE標準光源D65)。光源23係配置成與相較於偏光板2位在靠黏著片1側之評估用試樣15表面(無鹼玻璃20A之表面)相對向。追加之偏光板22係在光源23與評估用試樣15之間,配置成對偏光板2之吸收軸形成正交偏光之關係。接著,透過追加之偏光板22使來自光源23之光入射無鹼玻璃20A之表面。詳細而言,係使來自光源23之光入射追加之偏光板22,並使透射追加之偏光板22的透射光入射無鹼玻璃20A之表面。針對透射評估用試樣15的透射光,特定在波長360nm~740nm之範圍中的分光透射率,從該分光透射率特定出XYZ表色系統(CIE1931)中之三刺激值(X、Y及Z)。三刺激值於JIS Z8701:1999中有詳細規定。使用所得之三刺激值,藉由JIS Z8781-4:2013所規定之下述式(i)及(ii)特定出a *值及b *值。 [數學式1] Hereinafter, the test method 2 will be described in detail. First, the sample 15 for evaluation was produced by the method similar to test method 1. In the evaluation sample 15 of the test method 2, the size of the optical layered body 10A is, for example, 200 mm in length x 50 mm in width. In sample 15 for evaluation, the transparent adhesive sheet 21 and the non-alkali glass 20 are those which can ignore the influence on the hue of the transmitted light in the use test method 2. Next, after placing the sample 15 for evaluation in a heating environment at 105° C. for 250 hours, the sample 15 for evaluation was naturally cooled to room temperature (for example, 23° C.). Next, as shown in FIG. 3 , a light source 23 (CIE standard light source D65) in which an additional polarizing plate 22 is arranged is prepared. The light source 23 is disposed so as to face the surface of the evaluation sample 15 (the surface of the non-alkali glass 20A) which is on the side closer to the adhesive sheet 1 than the polarizing plate 2 . The additional polarizing plate 22 is disposed between the light source 23 and the evaluation sample 15 so as to form a cross-polarized relationship with respect to the absorption axis of the polarizing plate 2 . Next, the light from the light source 23 is incident on the surface of the non-alkali glass 20A through the added polarizing plate 22 . Specifically, the light from the light source 23 is made incident on the additional polarizing plate 22, and the transmitted light transmitted through the additional polarizing plate 22 is made incident on the surface of the non-alkali glass 20A. For the transmitted light of the sample 15 for transmission evaluation, the spectral transmittance in the wavelength range of 360nm~740nm is specified, and the three stimulus values (X, Y and Z) in the XYZ colorimetric system (CIE1931) are specified from the spectral transmittance ). Tristimulus values are specified in detail in JIS Z8701:1999. Using the obtained tristimulus value, a * value and b * value were specified by the following formulas (i) and (ii) prescribed in JIS Z8781-4:2013. [mathematical formula 1]

上述a *值宜為-0.2以上且0.5以下,較宜為-0.1以上且0.4以下。上述b *值宜為-1.2以上且0.3以下,較宜為-1.0以上且0.1以下。 The above-mentioned a * value is preferably not less than -0.2 and not more than 0.5, more preferably not less than -0.1 and not more than 0.4. The above b * value is preferably not less than -1.2 and not more than 0.3, more preferably not less than -1.0 and not more than 0.1.

(黏著片) 黏著片1具有1.0×10 10Ω/□以下之表面電阻值R。具有低至該程度之表面電阻值R的黏著片1即便在容易產生靜電之環境下,仍可防止影像顯示裝置因靜電造成顯示不良。此外,表面電阻值R意指黏著片1進行後述加濕處理前之表面電阻值。表面電阻值R例如為黏著片1剛製作後之表面電阻值。 (Adhesive Sheet) The adhesive sheet 1 has a surface resistance value R of 1.0×10 10 Ω/□ or less. The adhesive sheet 1 having a surface resistance value R as low as this level can prevent display failure of an image display device due to static electricity even in an environment where static electricity is likely to be generated. In addition, the surface resistance value R means the surface resistance value of the adhesive sheet 1 before the humidification process mentioned later is performed. The surface resistance value R is, for example, the surface resistance value immediately after the adhesive sheet 1 is produced.

黏著片1之表面電阻值R亦可為1.0×10 9Ω/□以下、8.0×10 8Ω/□以下、5.0×10 8Ω/□以下、2.0×10 8Ω/□以下、1.0×10 8Ω/□以下、8.0×10 7Ω/□以下、5.0×10 7Ω/□以下,更可為2.0×10 7Ω/□以下。表面電阻值R的下限無特別限定,例如為1.0×10 6Ω/□以上,亦可為1.0×10 7Ω/□以上。惟,將光學積層體10A利用於內建觸控感測機能之影像顯示面板時,由抑制觸控感測器之誤動作之觀點來看,表面電阻值R宜為5.0×10 6Ω/□以上,更宜為1.0×10 7Ω/□以上。黏著片1之表面電阻值R例如可使用高電阻電阻率計(舉一例為三菱化學Analytech製,Hiresta系列),在施加電壓250V、施加時間10秒之條件下進行測定。 The surface resistance value R of the adhesive sheet 1 may be 1.0×10 9 Ω/□ or less, 8.0×10 8 Ω/□ or less, 5.0×10 8 Ω/□ or less, 2.0×10 8 Ω/□ or less, 1.0×10 8 Ω/□ or less, 8.0×10 7 Ω/□ or less, 5.0×10 7 Ω/□ or less, and may be 2.0×10 7 Ω/□ or less. The lower limit of the surface resistance value R is not particularly limited, and is, for example, 1.0×10 6 Ω/□ or more, or 1.0×10 7 Ω/□ or more. However, when the optical laminate 10A is used in an image display panel with a built-in touch sensor function, from the viewpoint of suppressing malfunction of the touch sensor, the surface resistance value R is preferably 5.0×10 6 Ω/□ or more , more preferably at least 1.0×10 7 Ω/□. The surface resistance value R of the adhesive sheet 1 can be measured, for example, using a high-resistance resistivity meter (for example, Hiresta series manufactured by Mitsubishi Chemical Analytech), under the conditions of an applied voltage of 250V and an applied time of 10 seconds.

黏著片1即使在歷經多濕環境之情況下,表面電阻值宜仍小。舉一例來說,黏著片1利用下述試驗方法3進行加濕處理後之表面電阻值R 1例如為1.0×10 10Ω/□以下。此外,下述試驗方法3亦可對光學積層體10A進行。 試驗方法3:將黏著片1配置在65℃95%RH之加濕環境下250小時。並且,將黏著片1配置在40℃之環境下1小時使其乾燥。 The surface resistance of the adhesive sheet 1 should be small even after experiencing a humid environment. For example, the surface resistance value R 1 of the adhesive sheet 1 after the humidification treatment by the following test method 3 is, for example, 1.0×10 10 Ω/□ or less. In addition, the following test method 3 can also be performed on the optical layered body 10A. Test method 3: Place the adhesive sheet 1 in a humidified environment of 65°C and 95%RH for 250 hours. And the adhesive sheet 1 was arrange|positioned in the environment of 40 degreeC for 1 hour, and it dried.

黏著片1之表面電阻值R 1亦可為例如1.0×10 9Ω/□以下、8.0×10 8Ω/□以下、5.0×10 8Ω/□以下、2.0×10 8Ω/□以下、1.0×10 8Ω/□以下、8.0×10 7Ω/□以下、5.0×10 7Ω/□以下,更可為2.0×10 7Ω/□以下。表面電阻值R 1的下限無特別限定,例如為1.0×10 6Ω/□以上,亦可為1.0×10 7Ω/□以上。惟,將光學積層體10A利用於內建觸控感測機能之影像顯示面板時,由抑制觸控感測器之誤動作之觀點來看,表面電阻值R 1宜為5.0×10 6Ω/□以上,更宜為1.0×10 7Ω/□以上。 The surface resistance value R1 of the adhesive sheet 1 may be, for example, 1.0×10 9 Ω/□ or less, 8.0×10 8 Ω/□ or less, 5.0×10 8 Ω/□ or less, 2.0×10 8 Ω/□ or less, 1.0 ×10 8 Ω/□ or less, 8.0×10 7 Ω/□ or less, 5.0×10 7 Ω/□ or less, and may be 2.0×10 7 Ω/□ or less. The lower limit of the surface resistance value R 1 is not particularly limited, and is, for example, 1.0×10 6 Ω/□ or more, or 1.0×10 7 Ω/□ or more. However, when the optical laminate 10A is used in an image display panel with a built-in touch sensor function, the surface resistance value R 1 is preferably 5.0×10 6 Ω/□ from the viewpoint of suppressing malfunction of the touch sensor Above, more preferably 1.0×10 7 Ω/□ or above.

黏著片1在加濕處理後之表面電阻值R 1(Ω/□)相對於加濕處理前之表面電阻值R(Ω/□)的比R 1/R無特別限定,例如為10以下,亦可為8以下、5以下、4以下、3以下、2以下、1.5以下、1.4以下、1.3以下、1.2以下,更可為1.1以下。比R 1/R的下限值無特別限定,例如為0.95。當比R 1/R在10以下時,可抑制抗靜電性能隨時間降低。 The ratio R 1 /R of the surface resistance value R 1 (Ω/□) of the adhesive sheet 1 after the humidification treatment to the surface resistance value R (Ω/□) before the humidification treatment is not particularly limited, for example, it is 10 or less, It may be 8 or less, 5 or less, 4 or less, 3 or less, 2 or less, 1.5 or less, 1.4 or less, 1.3 or less, 1.2 or less, and may be 1.1 or less. The lower limit of the ratio R 1 /R is not particularly limited, and is, for example, 0.95. When the ratio R 1 /R is 10 or less, the antistatic performance can be suppressed from decreasing over time.

<聚合物(A)> 黏著片1係由含聚合物(A)之黏著劑組成物(I)形成之片材。聚合物(A)在頻率100kHz下之相對介電常數P為5.0以上。相對介電常數P可利用以下方法測定。首先,製作僅由聚合物(A)構成之厚度30µm的試驗片。針對該試驗片,依循JIS K6911:1995測定其在頻率100kHz下之相對介電常數。可將所得之測定值視為相對介電常數P。相對介電常數之測定條件的詳細內容如下。 ・測定條件 測定方法:電容法(裝置:Agilent Technologies公司製之4294A Precision Impedance Analyzer) 電極構成:直徑12.1mm且厚度0.5mm之鋁板 對向電極:3oz 銅板 測定環境:23±1℃,52±1%RH <Polymer (A)> Adhesive sheet 1 is a sheet formed of an adhesive composition (I) containing a polymer (A). The relative permittivity P of the polymer (A) at a frequency of 100 kHz is 5.0 or more. The relative permittivity P can be measured by the following method. First, a test piece with a thickness of 30 µm consisting only of the polymer (A) was produced. For this test piece, the relative permittivity at a frequency of 100 kHz was measured in accordance with JIS K6911:1995. The obtained measured value can be regarded as relative permittivity P. The details of the measurement conditions of the relative permittivity are as follows. ・Measurement conditions Measuring method: capacitance method (device: 4294A Precision Impedance Analyzer manufactured by Agilent Technologies) Electrode composition: Aluminum plate with a diameter of 12.1mm and a thickness of 0.5mm Counter electrode: 3oz copper plate Measurement environment: 23±1℃, 52±1%RH

相對介電常數P宜為5.5以上,亦可為6.0以上、6.5以上、7.0以上、7.3以上、7.4以上、7.5以上、7.6以上、7.7以上,更可為7.8以上。聚合物(A)之相對介電常數P愈高,愈有可抑制後述導電劑之摻混量,同時可降低黏著片1之表面電阻值的傾向。又,相對介電常數P愈高,有黏著片1對無鹼玻璃或ITO等透明導電層之密著性提升之傾向,從而有可抑制在實施耐久性試驗後之剝落的傾向。相對介電常數P的上限值無特別限定,例如為10。The relative permittivity P is preferably at least 5.5, and can be at least 6.0, at least 6.5, at least 7.0, at least 7.3, at least 7.4, at least 7.5, at least 7.6, at least 7.7, and can be at least 7.8. The higher the relative permittivity P of the polymer (A), the more likely it is possible to suppress the blending amount of the conductive agent described later and at the same time reduce the surface resistance value of the adhesive sheet 1 . Moreover, the higher the relative permittivity P is, the more the adhesion of the adhesive sheet 1 to the transparent conductive layer such as non-alkali glass or ITO tends to be improved, and the peeling after the durability test is performed tends to be suppressed. The upper limit of the relative permittivity P is not particularly limited, and is 10, for example.

聚合物(A)可舉例如(甲基)丙烯酸系聚合物、胺甲酸酯系聚合物、聚矽氧系聚合物、橡膠系聚合物等,宜為(甲基)丙烯酸系聚合物。黏著劑組成物(I)例如包含(甲基)丙烯酸系聚合物作為主成分。換言之,黏著劑組成物(I)為丙烯酸系黏著劑組成物。主成分意指組成物中含有率最大之成分。主成分之含有率例如為50重量%以上,亦可為60重量%以上、70重量%以上、75重量%以上,更可為80重量%以上。此外,本說明書中,(甲基)丙烯酸系聚合物意指具有源自(甲基)丙烯酸酯等之(甲基)丙烯酸系單體之結構單元的聚合物。「(甲基)丙烯醯基」意指丙烯酸及甲基丙烯醯基。又,「(甲基)丙烯酸酯」意指丙烯酸酯及甲基丙烯酸酯。The polymer (A) can be, for example, a (meth)acrylic polymer, a urethane polymer, a silicone polymer, a rubber polymer, etc., and is preferably a (meth)acrylic polymer. The adhesive composition (I) contains, for example, a (meth)acrylic polymer as a main component. In other words, the adhesive composition (I) is an acrylic adhesive composition. The main component means the component with the largest content in the composition. The content rate of the main component is, for example, 50% by weight or more, may be 60% by weight or more, 70% by weight or more, 75% by weight or more, and may be 80% by weight or more. In addition, in this specification, a (meth)acrylic-type polymer means the polymer which has the structural unit derived from the (meth)acrylic-type monomer, such as (meth)acrylate. "(Meth)acryl" means acrylic and methacryl. Moreover, "(meth)acrylate" means acrylate and methacrylate.

聚合物(A)宜具有源自含烷氧基單體(A1)之結構單元。聚合物(A)亦可具有1種或2種以上源自含烷氧基單體(A1)之結構單元。作為含烷氧基單體(A1),可舉例如以下化學式(1)所示之(甲基)丙烯酸酯。式(1)之R 1為氫原子或甲基。式(1)之R 2為烷基。烷基可為直鏈狀,亦可具有支鏈。R 2宜為直鏈狀烷基。R 2之例為甲基及乙基。式(1)之n為1~30之整數,宜為1~5之整數。 [化學式1] The polymer (A) preferably has a structural unit derived from an alkoxy group-containing monomer (A1). The polymer (A) may have one or more structural units derived from the alkoxy group-containing monomer (A1). As an alkoxy group-containing monomer (A1), (meth)acrylate represented by following chemical formula (1) is mentioned, for example. R 1 in formula (1) is a hydrogen atom or a methyl group. R 2 in formula (1) is an alkyl group. The alkyl group may be linear or branched. R 2 is preferably a linear alkyl group. Examples of R 2 are methyl and ethyl. n in formula (1) is an integer of 1 to 30, preferably an integer of 1 to 5. [chemical formula 1]

式(1)所示之(甲基)丙烯酸酯之例為:(甲基)丙烯酸2-甲氧乙酯、(甲基)丙烯酸2-乙氧乙酯、(甲基)丙烯酸2-(2-乙氧乙氧基)乙酯、(甲基)丙烯酸甲氧基三乙二醇酯及(甲基)丙烯酸甲氧基聚乙二醇酯,宜為丙烯酸2-甲氧乙酯(MEA)。源自式(1)之(甲基)丙烯酸酯之結構單元可有助於降低黏著片1之表面電阻值。詳細而言,根據源自式(1)之(甲基)丙烯酸酯之結構單元,有可抑制後述導電劑之摻混量、且可降低黏著片1之表面電阻值的傾向。Examples of (meth)acrylates represented by formula (1) are: (meth)acrylate 2-methoxyethyl, (meth)acrylate 2-ethoxyethyl, (meth)acrylate 2-(2 - Ethoxyethoxy)ethyl, methoxytriethylene glycol (meth)acrylate and methoxypolyethylene glycol (meth)acrylate, preferably 2-methoxyethyl acrylate (MEA) . Structural units derived from (meth)acrylates of formula (1) can help reduce the surface resistance of the adhesive sheet 1 . Specifically, the structural unit derived from the (meth)acrylate of the formula (1) tends to suppress the compounding amount of the conductive agent described later and reduce the surface resistance value of the adhesive sheet 1 .

聚合物(A)中,源自含烷氧基單體(A1)之結構單元、尤其是源自式(1)之(甲基)丙烯酸酯之結構單元之含有率例如為15重量%以上,亦可為20重量%以上、30重量%以上、40重量%以上、50重量%以上、60重量%以上、70重量%以上、80重量%以上、90重量%以上,更可為95重量%以上。源自含烷氧基單體(A1)之結構單元之含有率的上限值無特別限定,例如為99重量%。In the polymer (A), the content rate of the structural unit derived from the alkoxy group-containing monomer (A1), especially the structural unit derived from the (meth)acrylate of formula (1), is, for example, 15% by weight or more, It can also be more than 20% by weight, more than 30% by weight, more than 40% by weight, more than 50% by weight, more than 60% by weight, more than 70% by weight, more than 80% by weight, more than 90% by weight, and more than 95% by weight . Although the upper limit of the content rate of the structural unit derived from an alkoxy group-containing monomer (A1) is not specifically limited, For example, it is 99 weight%.

聚合物(A)亦可具有源自含烷氧基單體(A1)之結構單元以外之結構單元。該結構單元係源自可與含烷氧基單體(A1)共聚之單體(A2)。聚合物(A)亦可具有1種或2種以上該結構單元。The polymer (A) may have a structural unit other than the structural unit derived from the alkoxy group-containing monomer (A1). The structural unit is derived from a monomer (A2) copolymerizable with the alkoxy-containing monomer (A1). The polymer (A) may have 1 type or 2 or more types of this structural unit.

單體(A2)之例為含羥基單體。含羥基單體亦可為含羥基(甲基)丙烯酸系單體。含羥基單體之例為:(甲基)丙烯酸2-羥乙酯、(甲基)丙烯酸3-羥丙酯、(甲基)丙烯酸4-羥丁酯、(甲基)丙烯酸6-羥己酯、(甲基)丙烯酸8-羥辛酯、(甲基)丙烯酸10-羥癸酯及(甲基)丙烯酸12-羥月桂酯等之(甲基)丙烯酸羥烷基酯以及(4-羥甲基環己基)-甲基丙烯酸酯。由使黏著片之耐久性提升之觀點來看,宜為(甲基)丙烯酸2-羥乙酯、(甲基)丙烯酸4-羥丁酯,較宜為(甲基)丙烯酸4-羥丁酯。聚合物(A)中源自含羥基單體之結構單元之含有率例如為1重量%~5重量%,亦可為3重量%以下,更可為2重量%以下。Examples of the monomer (A2) are hydroxyl group-containing monomers. The hydroxyl group-containing monomer may also be a hydroxyl group-containing (meth)acrylic monomer. Examples of hydroxyl-containing monomers are: 2-hydroxyethyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, 6-hydroxyhexyl (meth)acrylate hydroxyalkyl (meth)acrylate and (4-hydroxy Methylcyclohexyl)-methacrylate. From the viewpoint of improving the durability of the adhesive sheet, 2-hydroxyethyl (meth)acrylate and 4-hydroxybutyl (meth)acrylate are preferable, and 4-hydroxybutyl (meth)acrylate is more preferable. . The content of the structural unit derived from the hydroxyl group-containing monomer in the polymer (A) is, for example, 1% by weight to 5% by weight, may be 3% by weight or less, and may be 2% by weight or less.

單體(A2)之另一例為於側鏈具有碳數1~30烷基之(甲基)丙烯酸系單體。烷基可為直鏈狀,亦可具有支鏈。於側鏈具有烷基之(甲基)丙烯酸系單體之例為:(甲基)丙烯酸甲酯、(甲基)丙烯酸乙酯、(甲基)丙烯酸丙酯、(甲基)丙烯酸異丙酯、(甲基)丙烯酸正丁酯、(甲基)丙烯酸二級丁酯、(甲基)丙烯酸三級丁酯、(甲基)丙烯酸異丁酯、(甲基)丙烯酸正戊酯、(甲基)丙烯酸異戊酯、(甲基)丙烯酸正己酯、(甲基)丙烯酸異己酯、(甲基)丙烯酸異庚酯、(甲基)丙烯酸2-乙基己酯、(甲基)丙烯酸正辛酯、(甲基)丙烯酸異辛酯、(甲基)丙烯酸正壬酯、(甲基)丙烯酸異壬酯、(甲基)丙烯酸正癸酯、(甲基)丙烯酸異癸酯、(甲基)丙烯酸正十二酯((甲基)丙烯酸月桂酯)、(甲基)丙烯酸正十三酯、(甲基)丙烯酸正十四酯、(甲基)丙烯酸十五酯、(甲基)丙烯酸十六酯、(甲基)丙烯酸十七酯及(甲基)丙烯酸十八酯。聚合物(A)中源自於側鏈具有烷基之(甲基)丙烯酸系單體之結構單元之含有率例如為80重量%以下,可為70重量%以下、60重量%以下、50重量%以下、40重量%以下、30重量%以下、20重量%以下,更可為10重量%以下,亦可為0重量%(亦可不含該結構單元)。Another example of the monomer (A2) is a (meth)acrylic monomer having an alkyl group having 1 to 30 carbon atoms in the side chain. The alkyl group may be linear or branched. Examples of (meth)acrylic monomers having an alkyl group in the side chain are: methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, isopropyl (meth)acrylate Esters, n-butyl (meth)acrylate, secondary butyl (meth)acrylate, tertiary butyl (meth)acrylate, isobutyl (meth)acrylate, n-pentyl (meth)acrylate, ( Isoamyl methacrylate, n-hexyl (meth)acrylate, isohexyl (meth)acrylate, isoheptyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, (meth)acrylic acid n-octyl, isooctyl (meth)acrylate, n-nonyl (meth)acrylate, isononyl (meth)acrylate, n-decyl (meth)acrylate, isodecyl (meth)acrylate, ( n-dodecyl methacrylate (lauryl (meth)acrylate), n-tridecyl (meth)acrylate, n-tetradecyl (meth)acrylate, pentadecyl (meth)acrylate, (meth)acrylate ) cetyl acrylate, heptadecyl (meth)acrylate and stearyl (meth)acrylate. The content of the structural unit derived from the (meth)acrylic monomer having an alkyl group in the polymer (A) is, for example, 80% by weight or less, 70% by weight or less, 60% by weight or less, or 50% by weight. % or less, 40% by weight or less, 30% by weight or less, 20% by weight or less, more preferably 10% by weight or less, or 0% by weight (this structural unit may not be included).

單體(A2)亦可為含芳香環單體、含羧基單體、含胺基單體、含醯胺基單體。含芳香環單體亦可為含芳香環(甲基)丙烯酸系單體。含芳香環單體之例為:(甲基)丙烯酸苯酯、(甲基)丙烯酸苯氧乙酯、(甲基)丙烯酸苄酯、(甲基)丙烯酸苯氧基二乙二醇酯、氧化乙烯改質壬苯酚(甲基)丙烯酸酯、羥乙基化β-萘酚(甲基)丙烯酸酯及聯苯(甲基)丙烯酸酯。含羧基單體之例為(甲基)丙烯酸、(甲基)丙烯酸羧乙酯、(甲基)丙烯酸羧戊酯、伊康酸、馬來酸、延胡索酸及巴豆酸。含胺基單體之例為N,N-二甲基胺乙基(甲基)丙烯酸酯及N,N-二甲基胺丙基(甲基)丙烯酸酯等。含醯胺基單體之例為:(甲基)丙烯醯胺、N,N-二甲基(甲基)丙烯醯胺、N,N-二乙基(甲基)丙烯醯胺、N-異丙基丙烯醯胺、N-甲基(甲基)丙烯醯胺、N-丁基(甲基)丙烯醯胺、N-己基(甲基)丙烯醯胺、N-羥甲基(甲基)丙烯醯胺、N-羥甲基-N-丙烷(甲基)丙烯醯胺、胺甲基(甲基)丙烯醯胺、胺乙基(甲基)丙烯醯胺、巰甲基(甲基)丙烯醯胺及巰乙基(甲基)丙烯醯胺等丙烯醯胺系單體;N-(甲基)丙烯醯基嗎福林、N-(甲基)丙烯醯基哌啶及N-(甲基)丙烯醯基吡咯啶等N-丙烯醯基雜環單體;以及N-乙烯吡咯啶酮及N-乙烯基-ε-己內醯胺等含N-乙烯基內醯胺系單體。The monomer (A2) may also be an aromatic ring-containing monomer, a carboxyl-containing monomer, an amine-containing monomer, or an amide-containing monomer. The aromatic ring-containing monomer may also be an aromatic ring-containing (meth)acrylic monomer. Examples of aromatic ring-containing monomers are: phenyl (meth)acrylate, phenoxyethyl (meth)acrylate, benzyl (meth)acrylate, phenoxydiethylene glycol (meth)acrylate, oxidized Vinyl modified nonylphenol (meth)acrylate, hydroxyethylated β-naphthol (meth)acrylate and biphenyl (meth)acrylate. Examples of carboxyl group-containing monomers are (meth)acrylic acid, carboxyethyl (meth)acrylate, carboxypentyl (meth)acrylate, itaconic acid, maleic acid, fumaric acid and crotonic acid. Examples of amino group-containing monomers include N,N-dimethylaminoethyl (meth)acrylate and N,N-dimethylaminopropyl (meth)acrylate. Examples of amide-containing monomers are: (meth)acrylamide, N,N-dimethyl(meth)acrylamide, N,N-diethyl(meth)acrylamide, N- Isopropylacrylamide, N-methyl(meth)acrylamide, N-butyl(meth)acrylamide, N-hexyl(meth)acrylamide, N-methylol(methyl)acrylamide ) acrylamide, N-methylol-N-propane(meth)acrylamide, aminomethyl(meth)acrylamide, aminoethyl(meth)acrylamide, mercaptomethyl(methyl)acrylamide ) acrylamide and mercaptoethyl (meth)acrylamide and other acrylamide-based monomers; N-acryl heterocyclic monomers such as (meth)acrylpyrrolidine; body.

單體(A2)亦可為多官能性單體。多官能性單體之例為:己二醇二(甲基)丙烯酸酯(1,6-己二醇二(甲基)丙烯酸酯)、丁二醇二(甲基)丙烯酸酯、(聚)乙二醇二(甲基)丙烯酸酯、(聚)丙二醇二(甲基)丙烯酸酯、新戊二醇二(甲基)丙烯酸酯、新戊四醇二(甲基)丙烯酸酯、新戊四醇三(甲基)丙烯酸酯、二新戊四醇六(甲基)丙烯酸酯、三羥甲丙烷三(甲基)丙烯酸酯、四羥甲基甲烷三(甲基)丙烯酸酯、(甲基)丙烯酸烯丙酯、(甲基)丙烯酸乙烯酯、環氧丙烯酸酯、聚酯丙烯酸酯及胺甲酸酯丙烯酸酯等多官能丙烯酸酯;以及二乙烯苯。多官能丙烯酸酯宜為1,6-己二醇二丙烯酸酯、二新戊四醇六(甲基)丙烯酸酯。Monomer (A2) may also be a polyfunctional monomer. Examples of polyfunctional monomers are: hexanediol di(meth)acrylate (1,6-hexanediol di(meth)acrylate), butanediol di(meth)acrylate, (poly) Ethylene Glycol Di(meth)acrylate, (Poly)propylene Glycol Di(meth)acrylate, Neopentyl Glycol Di(meth)acrylate, Neopentyl Glycol Di(meth)acrylate, Neopentyl tetra Alcohol tri(meth)acrylate, Dineopentaerythritol hexa(meth)acrylate, Trimethylolpropane tri(meth)acrylate, Tetramethylolmethane tri(meth)acrylate, (Meth ) polyfunctional acrylates such as allyl acrylate, vinyl (meth)acrylate, epoxy acrylate, polyester acrylate and urethane acrylate; and divinylbenzene. The multifunctional acrylate is preferably 1,6-hexanediol diacrylate and dipenteoerythritol hexa(meth)acrylate.

聚合物(A)中,源自含芳香環單體之結構單元之含有率例如為3重量%~25重量%,宜為8重量%~24重量%,較宜為10重量%~22重量%,更宜為12重量%~18重量%。源自含芳香環單體之結構單元之含有率依情況而異,可為10重量%以下,亦可為8重量%以下。聚合物(A)亦可不含源自含芳香環單體之結構單元。In the polymer (A), the content rate of the structural unit derived from the aromatic ring-containing monomer is, for example, 3% by weight to 25% by weight, preferably 8% by weight to 24% by weight, more preferably 10% by weight to 22% by weight , more preferably 12% by weight to 18% by weight. The content of the structural unit derived from the aromatic ring-containing monomer varies depending on the case, but may be 10% by weight or less, or may be 8% by weight or less. The polymer (A) may not contain a structural unit derived from an aromatic ring-containing monomer.

聚合物(A)中源自含羧基單體、含胺基單體、含醯胺基單體及多官能性單體之結構單元之含有率的合計宜為20重量%以下,較宜為10重量%以下,更宜為8重量%以下。聚合物(A)具有該結構單元時,含有率的合計例如為0.01重量%以上,可為1重量%以上、2重量%以上,更可為3重量%以上。聚合物(A)亦可不含該等結構單元。尤其,聚合物(A)中,源自含羧基單體之結構單元之含有率可小於0.1重量%,亦可為0重量%(亦可不含該結構單元)。藉由令源自含羧基單體之結構單元之含有率小於0.1重量%,即便在黏著片1與ITO等之金屬氧化物接觸之情況下,仍有可抑制該金屬氧化物腐蝕的傾向。以以往之黏著片來說,當聚合物中源自含羧基單體之結構單元之含有率小於0.1重量%時,有在高溫試驗、尤其是在車載用顯示器等所要求之95℃以上之條件下之高溫試驗下容易發生黏著片剝落之傾向。另一方面,在本實施形態之黏著片1中,藉由將聚合物(A)之相對介電常數P調整成5.0以上,即便在聚合物(A)中源自含羧基單體之結構單元之含有率小於0.1重量%之情況下,仍有可抑制剝落之傾向,而可輕易兼顧高溫耐久性與耐腐蝕性。The total content of structural units derived from carboxyl group-containing monomers, amine group-containing monomers, amide group-containing monomers, and polyfunctional monomers in the polymer (A) is preferably 20% by weight or less, more preferably 10% by weight. % by weight or less, more preferably 8% by weight or less. When the polymer (A) has this structural unit, the total content is, for example, 0.01% by weight or more, may be 1% by weight or more, 2% by weight or more, and may be 3% by weight or more. The polymer (A) may not contain these structural units. In particular, in the polymer (A), the content of the structural unit derived from the carboxyl group-containing monomer may be less than 0.1% by weight, or may be 0% by weight (the structural unit may not be contained). By making the content of the structural unit derived from the carboxyl group-containing monomer less than 0.1% by weight, even when the adhesive sheet 1 is in contact with a metal oxide such as ITO, the tendency of the metal oxide to corrode can be suppressed. In the case of conventional adhesive sheets, when the content of structural units derived from carboxyl group-containing monomers in the polymer is less than 0.1% by weight, there are conditions above 95°C required in high temperature tests, especially in automotive displays. Under the high temperature test, the adhesive sheet tends to peel off easily. On the other hand, in the adhesive sheet 1 of the present embodiment, by adjusting the relative dielectric constant P of the polymer (A) to 5.0 or more, even structural units derived from carboxyl group-containing monomers in the polymer (A) When the content is less than 0.1% by weight, peeling tends to be suppressed, and high temperature durability and corrosion resistance can be easily balanced.

其他單體(A2)之例為:(甲基)丙烯腈等含腈基之(甲基)丙烯酸酯;(甲基)丙烯酸環氧丙酯及(甲基)丙烯酸甲基環氧丙酯等含環氧基單體;乙烯基磺酸鈉等含磺酸基單體;含磷酸基單體;(甲基)丙烯酸環戊酯、(甲基)丙烯酸環己酯及(甲基)丙烯酸異莰酯等具有脂環式烴基之(甲基)丙烯酸酯;乙酸乙烯酯及丙酸乙烯酯等乙烯酯類;苯乙烯及乙烯基甲苯等芳香族乙烯基化合物;乙烯、丙烯、丁二烯、異戊二烯及異丁烯等烯烴類或二烯類;乙烯基烷基醚等乙烯基醚類;以及氯乙烯。Examples of other monomers (A2) are: (meth)acrylonitrile and other nitrile-containing (meth)acrylates; glycidyl (meth)acrylate and methylglycidyl (meth)acrylate, etc. Monomers containing epoxy groups; Monomers containing sulfonic acid groups such as sodium vinyl sulfonate; Monomers containing phosphoric acid groups; Cyclopentyl (meth)acrylate, cyclohexyl (meth)acrylate and iso(meth)acrylate (meth)acrylates with alicyclic hydrocarbon groups such as camphor; vinyl esters such as vinyl acetate and vinyl propionate; aromatic vinyl compounds such as styrene and vinyl toluene; ethylene, propylene, butadiene, Olefins or dienes such as isoprene and isobutylene; vinyl ethers such as vinyl alkyl ethers; and vinyl chloride.

聚合物(A)中源自上述其他單體(A2)之結構單元之含有率的合計例如為30重量%以下,亦可為10重量%以下,宜為0重量%(不含該結構單元)。The total content of the structural units derived from the other monomer (A2) in the polymer (A) is, for example, 30% by weight or less, may be 10% by weight or less, preferably 0% by weight (excluding the structural unit) .

聚合物(A)可藉由公知方法將上述1種或2種以上單體聚合而形成。亦可將單體與單體之部分聚合物聚合。聚合例如可藉由溶液聚合、乳化聚合、塊狀聚合、熱聚合、活性能量線聚合來實施。由可形成光學透明性優異之黏著片之觀點來看,宜為溶液聚合、活性能量線聚合。聚合宜避免單體及/或部分聚合物與氧接觸來實施,因此可採用例如在氮等非活性氣體環境下之聚合、或是在藉由樹脂薄膜等阻隔氧之狀態下之聚合。形成之聚合物(A)可為無規共聚物、嵌段共聚物、接枝共聚物等之任一態樣。The polymer (A) can be formed by polymerizing one or more monomers described above by a known method. It is also possible to polymerize monomers and partial polymers of monomers. Polymerization can be implemented by, for example, solution polymerization, emulsion polymerization, bulk polymerization, thermal polymerization, or active energy ray polymerization. From the viewpoint of being able to form an adhesive sheet excellent in optical transparency, solution polymerization or active energy ray polymerization is preferable. Polymerization should be carried out by avoiding contact of monomer and/or part of the polymer with oxygen. Therefore, for example, polymerization in an inert gas environment such as nitrogen, or polymerization in a state where oxygen is blocked by a resin film or the like can be used. The formed polymer (A) may be any form of a random copolymer, a block copolymer, a graft copolymer, or the like.

形成聚合物(A)之聚合系統亦可包含有1種或2種以上聚合引發劑。聚合引發劑之種類可依聚合反應來選擇,例如亦可為熱聚合引發劑、光聚合引發劑。The polymerization system for forming the polymer (A) may also contain one or two or more polymerization initiators. The type of polymerization initiator can be selected according to the polymerization reaction, for example, it can also be a thermal polymerization initiator or a photopolymerization initiator.

溶液聚合所用之溶劑例如為:乙酸乙酯、乙酸正丁酯等酯類;甲苯、苯等芳香族烴類;正己烷、正庚烷等脂肪族烴類;環己烷、甲基環己烷等脂環式烴類;甲基乙基酮、甲基異丁基酮等酮類。惟,溶劑不受上述例所限。溶劑亦可為2種以上溶劑之混合溶劑。Solvents used in solution polymerization are, for example: esters such as ethyl acetate and n-butyl acetate; aromatic hydrocarbons such as toluene and benzene; aliphatic hydrocarbons such as n-hexane and n-heptane; cyclohexane and methylcyclohexane Alicyclic hydrocarbons such as methyl ethyl ketone, methyl isobutyl ketone and other ketones. However, the solvent is not limited to the above examples. The solvent may be a mixed solvent of two or more solvents.

溶液聚合所用之聚合引發劑例如為偶氮系聚合引發劑、過氧化物系聚合引發劑、氧化還原系聚合引發劑。過氧化物系聚合引發劑例如為二苯甲醯基過氧化物、過氧化馬來酸三級丁酯。其中又宜為日本專利特開2002-69411號公報中揭示之偶氮系聚合引發劑。該偶氮系聚合引發劑例如為2,2'-偶氮雙異丁腈(AIBN)、2,2'-偶氮雙-2-甲基丁腈、2,2'-偶氮雙(2-甲基丙酸)二甲酯、4,4'-偶氮雙-4-氰戊酸。惟,聚合引發劑不受上述例所限。偶氮系聚合引發劑之使用量例如相對於單體之總量100重量份為0.05~0.5重量份,亦可為0.1~0.3重量份。The polymerization initiator used for the solution polymerization is, for example, an azo-type polymerization initiator, a peroxide-type polymerization initiator, or a redox-type polymerization initiator. Peroxide-based polymerization initiators are, for example, dibenzoyl peroxide and tertiary butyl peroxymaleate. Among them, the azo-based polymerization initiator disclosed in Japanese Patent Application Laid-Open No. 2002-69411 is preferable. The azo-based polymerization initiator is, for example, 2,2'-azobisisobutyronitrile (AIBN), 2,2'-azobis-2-methylbutyronitrile, 2,2'-azobis(2 -dimethylpropionate), 4,4'-azobis-4-cyanovaleric acid. However, the polymerization initiator is not limited to the above examples. The usage-amount of an azo type polymerization initiator is 0.05-0.5 weight part with respect to 100 weight part of total monomers, for example, and may be 0.1-0.3 weight part.

活性能量線聚合所用之活性能量線例如為α射線、β射線、γ射線、中子射線、電子束等游離輻射線、及紫外線。活性能量線以紫外線為佳。利用紫外線照射之聚合亦稱為光聚合。活性能量線聚合之聚合系統典型上包含光聚合引發劑。活性能量聚合之聚合條件只要能形成聚合物(A),便無限定。The active energy rays used for active energy ray polymerization are, for example, alpha rays, beta rays, gamma rays, neutron rays, ionizing radiation rays such as electron beams, and ultraviolet rays. The active energy rays are preferably ultraviolet rays. Polymerization by ultraviolet irradiation is also called photopolymerization. The polymerization system of active energy ray polymerization typically includes a photopolymerization initiator. The polymerization conditions of the active energy polymerization are not limited as long as the polymer (A) can be formed.

光聚合引發劑例如為:苯偶姻醚系光聚合引發劑、苯乙酮系光聚合引發劑、α-酮醇系光聚合引發劑、芳香族磺醯氯系光聚合引發劑、光活性肟系光聚合引發劑、苯偶姻系光聚合引發劑、苯甲基系光聚合引發劑、二苯基酮系光聚合引發劑、縮酮系光聚合引發劑、9-氧硫𠮿系光聚合引發劑。惟,光聚合引發劑不受上述例所限。The photopolymerization initiator is, for example, a benzoin ether photopolymerization initiator, an acetophenone photopolymerization initiator, an α-ketol alcohol photopolymerization initiator, an aromatic sulfonyl chloride photopolymerization initiator, a photoactive oxime Photopolymerization initiator, benzoin photopolymerization initiator, benzyl photopolymerization initiator, benzophenone photopolymerization initiator, ketal photopolymerization initiator, 9-oxosulfur Department of photopolymerization initiator. However, the photopolymerization initiator is not limited to the above examples.

苯偶姻醚系光聚合引發劑例如為:苯偶姻甲醚、苯偶姻乙醚、苯偶姻丙醚、苯偶姻異丙醚、苯偶姻異丁醚、2,2-二甲氧基-1,2-二苯基乙-1-酮、苯甲醚甲醚。苯乙酮系光聚合引發劑例如為:2,2-二乙氧基苯乙酮、2,2-二甲氧基-2-苯基苯乙酮、1-羥環己基苯基酮、4-苯氧基二氯苯乙酮、4-(三級丁基)二氯苯乙酮。α-酮醇系光聚合引發劑例如為:2-甲基-2-羥苯丙酮、1-[4-(2-羥乙基)苯]-2-甲基丙-1-酮。芳香族磺醯氯系光聚合引發劑例如為2-萘磺醯氯。光活性肟系光聚合引發劑例如為1-苯-1,1-丙二酮-2-(鄰乙氧羰基)-肟。苯偶姻系光聚合引發劑例如為苯偶姻。苯甲基系光聚合引發劑例如為苯甲基。二苯基酮系光聚合引發劑例如為二苯基酮、苯甲醯苯甲酸、3,3'-二甲基-4-甲氧基二苯基酮、聚乙烯基二苯基酮、α-羥環己基苯基酮。縮酮系光聚合引發劑例如為苯甲基二甲基縮酮。9-氧硫𠮿系光聚合引發劑例如為:9-氧硫𠮿、2-氯9-氧硫𠮿、2-甲基9-氧硫𠮿、2,4-二甲基9-氧硫𠮿、異丙基9-氧硫𠮿、2,4-二異丙基9-氧硫𠮿、十二烷基9-氧硫𠮿Benzoin ether-based photopolymerization initiators are, for example: benzoin methyl ether, benzoin ethyl ether, benzoin propyl ether, benzoin isopropyl ether, benzoin isobutyl ether, 2,2-dimethoxy Base-1,2-diphenylethan-1-one, anisole methyl ether. Acetophenone-based photopolymerization initiators are, for example: 2,2-diethoxyacetophenone, 2,2-dimethoxy-2-phenylacetophenone, 1-hydroxycyclohexyl phenyl ketone, 4 -Phenoxydichloroacetophenone, 4-(tertiary butyl)dichloroacetophenone. The α-ketol-based photopolymerization initiators include, for example, 2-methyl-2-hydroxypropiophenone and 1-[4-(2-hydroxyethyl)benzene]-2-methylpropan-1-one. The aromatic sulfonyl chloride photopolymerization initiator is, for example, 2-naphthalenesulfonyl chloride. The photoactive oxime-based photopolymerization initiator is, for example, 1-benzene-1,1-propanedione-2-(o-ethoxycarbonyl)-oxime. The benzoin-based photopolymerization initiator is, for example, benzoin. The benzyl group photopolymerization initiator is, for example, benzyl group. Benzophenone-based photopolymerization initiators are, for example, diphenylketone, benzoylbenzoic acid, 3,3'-dimethyl-4-methoxydiphenylketone, polyvinyldiphenylketone, α - Hydroxycyclohexyl phenyl ketone. The ketal photopolymerization initiator is, for example, benzyl dimethyl ketal. 9-oxosulfur A photopolymerization initiator such as: 9-oxosulfur 𠮿 , 2-Chloro9-oxosulfur 𠮿 , 2-methyl 9-oxosulfur 𠮿 , 2,4-Dimethyl 9-oxosulfur 𠮿 , Isopropyl 9-oxosulfur , 2,4-Diisopropyl 9-oxosulfur 𠮿 , dodecyl 9-oxosulfur 𠮿 .

光聚合引發劑之使用量例如相對於單體之總量100重量份為0.01~1重量份,亦可為0.05~0.5重量份。The usage-amount of a photoinitiator is 0.01-1 weight part with respect to 100 weight part of total monomers, for example, and may be 0.05-0.5 weight part.

聚合物(A)之重量平均分子量(Mw)例如為100萬~300萬,宜為180萬~300萬。藉由聚合物(A)之重量平均分子量為100萬~300萬,有可抑制黏著片之裂痕、且可抑制發生黏度上升或凝膠化之傾向。聚合物(A)之重量平均分子量Mw相對於數量平均分子量Mn之比(Mw/Mn)例如為20以下,宜為10以下,較宜為7以下,更宜為2.5~5。根據Mw/Mn為20以下之聚合物(A),不僅容易將黏著片1調節成適當之硬度,還可抑制黏著片1在加熱試驗時發泡或剝落。根據該聚合物(A),還有黏著片1之加工性良好之傾向。本說明書中之聚合物及寡聚物之重量平均分子量(Mw)或Mw/Mn係根據GPC(凝膠滲透層析法;Gel Permeation Chromatography)測定之值(聚苯乙烯換算)。The weight average molecular weight (Mw) of the polymer (A) is, for example, 1 million to 3 million, preferably 1.8 million to 3 million. When the weight-average molecular weight of the polymer (A) is 1 million to 3 million, cracks in the adhesive sheet can be suppressed, and the occurrence of viscosity increase or gelation tends to be suppressed. The ratio (Mw/Mn) of the weight average molecular weight Mw of the polymer (A) to the number average molecular weight Mn is, for example, 20 or less, preferably 10 or less, more preferably 7 or less, more preferably 2.5-5. According to the polymer (A) whose Mw/Mn is 20 or less, it is not only easy to adjust the hardness of the adhesive sheet 1 to an appropriate degree, but also suppresses foaming or peeling of the adhesive sheet 1 during a heating test. According to this polymer (A), the processability of the adhesive sheet 1 also tends to be favorable. The weight average molecular weight (Mw) or Mw/Mn of the polymer and oligomer in this specification is the value (polystyrene conversion) measured by GPC (gel permeation chromatography; Gel Permeation Chromatography).

聚合物(A)之玻璃轉移溫度(Tg)例如為-50℃以下,宜為-52℃以下,較宜為-55℃以下。聚合物(A)之Tg的下限值例如為-75℃。聚合物(A)之Tg係對每個形成聚合物(A)之結構單元的單體求算製成均聚物時之Tg,並考慮結構單元之含有率,將該等Tg進行平均所得之值。The glass transition temperature (Tg) of the polymer (A) is, for example, -50°C or lower, preferably -52°C or lower, more preferably -55°C or lower. The lower limit of Tg of a polymer (A) is -75 degreeC, for example. The Tg of the polymer (A) is obtained by calculating the Tg of each monomer forming the structural unit of the polymer (A) when it is made into a homopolymer, and taking the content rate of the structural unit into consideration, and averaging these Tg value.

黏著劑組成物(I)中之聚合物(A)的含有率以固體成分比計,例如為50重量%以上,亦可為60重量%以上、70重量%以上,更可為80重量%以上。含有率的上限例如為99重量%以下,亦可為97重量%以下、95重量%以下、93重量%以下,更可為90重量%以下。The content of the polymer (A) in the adhesive composition (I) is, in terms of solid content ratio, for example, 50% by weight or more, may be 60% by weight or more, 70% by weight or more, and may be 80% by weight or more . The upper limit of the content rate is, for example, 99% by weight or less, may be 97% by weight or less, 95% by weight or less, 93% by weight or less, and may be 90% by weight or less.

<導電劑> 黏著劑組成物(I)更包含例如導電劑(抗靜電劑)。黏著劑組成物(I)亦可具有1種或2種以上導電劑。導電劑之例為鹽等的離子性化合物。離子性化合物亦可為在常溫(25℃)下為液體之離子液體。離子性化合物之熔點可低於25℃,可為25℃~90℃,亦可高於90℃。離子性化合物之熔點宜低於25℃或高於90℃。離子性化合物之熔點低於25℃時,會析出離子性化合物而可降低對外觀造成影響的風險。又,離子性化合物之熔點高於90℃時,有離子性化合物不易從黏著片1滲出之傾向。 <Conductive agent> The adhesive composition (I) further includes, for example, a conductive agent (antistatic agent). The adhesive composition (I) may have one or more conductive agents. Examples of the conductive agent are ionic compounds such as salts. The ionic compound may also be an ionic liquid that is liquid at normal temperature (25° C.). The melting point of ionic compounds can be lower than 25°C, 25°C~90°C, or higher than 90°C. The melting point of the ionic compound is preferably lower than 25°C or higher than 90°C. When the melting point of the ionic compound is lower than 25°C, the ionic compound will be precipitated to reduce the risk of affecting the appearance. In addition, when the melting point of the ionic compound is higher than 90° C., the ionic compound tends to bleed out from the adhesive sheet 1 less easily.

離子性化合物可舉例如無機陽離子鹽、有機陽離子鹽。無機陽離子鹽具體上為無機陽離子-陰離子鹽。無機陽離子鹽所含之陽離子可舉例如鹼金屬離子。鹼金屬離子可舉鋰離子、鈉離子、鉀離子等,宜為鋰離子。由降低黏著片1之表面電阻值之觀點來看,無機陽離子鹽宜為鋰鹽。Examples of ionic compounds include inorganic cation salts and organic cation salts. Inorganic cation salts are in particular inorganic cation-anion salts. The cations contained in the inorganic cation salts include, for example, alkali metal ions. Examples of alkali metal ions include lithium ions, sodium ions, potassium ions, etc., preferably lithium ions. From the viewpoint of reducing the surface resistance value of the adhesive sheet 1, the inorganic cation salt is preferably a lithium salt.

無機陽離子鹽所含之陰離子可舉Cl -、Br -、I -、AlCl 4 -、Al 2Cl 7 -、BF 4 -、PF 6 -、ClO 4 -、NO 3 -、CH 3COO -、CF 3COO -、CH 3SO 3 -、CF 3SO 3 -、(CF 3SO 2) 3C -、AsF 6 -、SbF 6 -、NbF 6 -、TaF 6 -、(CN) 2N -、C 4F 9SO 3 -、C 3F 7COO -、(CF 3SO 2)(CF 3CO)N --O 3S(CF 2) 3SO 3 -及下述通式(a)~(d)所示之陰離子。 (a)(C nF 2n+1SO 2) 2N -(n為1~10之整數) (b)CF 2(C mF 2mSO 2) 2N -(m為1~10之整數) (c) -O 3S(CF 2) lSO 3 -(l為1~10之整數) (d)(C pF 2p+1SO 2)N -(C qF 2q+1SO 2) (p及q彼此獨立為1~10之整數) Anions contained in inorganic cationic salts include Cl - , Br - , I - , AlCl 4 - , Al 2 Cl 7 - , BF 4 - , PF 6 - , ClO 4 - , NO 3 - , CH 3 COO - , CF 3 COO - , CH 3 SO 3 - , CF 3 SO 3 - , (CF 3 SO 2 ) 3 C - , AsF 6 - , SbF 6 - , NbF 6 - , TaF 6 - , (CN) 2 N - , C 4 F 9 SO 3 - , C 3 F 7 COO - , (CF 3 SO 2 )(CF 3 CO)N - , - O 3 S(CF 2 ) 3 SO 3 - and the following general formulas (a)~( d) Anions shown. (a)(C n F 2n+1 SO 2 ) 2 N - (n is an integer from 1 to 10) (b) CF 2 (C m F 2m SO 2 ) 2 N - (m is an integer from 1 to 10) (c) - O 3 S(CF 2 ) l SO 3 - (l is an integer from 1 to 10) (d)(C p F 2p+1 SO 2 )N - (C q F 2q+1 SO 2 ) ( p and q are independently integers from 1 to 10)

無機陽離子鹽所含之陰離子宜為含氟陰離子,較宜為含氟醯亞胺陰離子。含氟醯亞胺陰離子可舉例如具有全氟烷基之醯亞胺陰離子。含氟醯亞胺陰離子可舉(CF 3SO 2)(CF 3CO)N -、或是上述通式(a)、(b)或(d)所示之陰離子,宜為(CF 3SO 2) 2N -、(C 2F 5SO 2) 2N -等通式(a)所示之(全氟烷基磺醯基)醯亞胺,較宜為(CF 3SO 2) 2N -所示之雙(三氟甲磺醯基)醯亞胺。理想之無機陽離子鹽可舉例如鋰雙(三氟甲磺醯基)醯亞胺(LiTFSI)。 The anion contained in the inorganic cationic salt is preferably a fluorine-containing anion, more preferably a fluoride-containing imide anion. The fluorine-containing imide anion includes, for example, an imide anion having a perfluoroalkyl group. The fluorine-containing imide anion can be (CF 3 SO 2 )(CF 3 CO)N - , or an anion represented by the above general formula (a), (b) or (d), preferably (CF 3 SO 2 ) 2 N - , (C 2 F 5 SO 2 ) 2 N - and other (perfluoroalkylsulfonyl)imides represented by general formula (a), preferably (CF 3 SO 2 ) 2 N - The bis(trifluoromethanesulfonyl)imide shown. The ideal inorganic cation salt can be, for example, lithium bis(trifluoromethanesulfonyl)imide (LiTFSI).

有機陽離子鹽具體上為有機陽離子-陰離子鹽。有機陽離子鹽所含之陽離子可舉例如包含有機基之有機鎓。有機鎓所含之鎓可舉例如含氮鎓、含硫鎓、含磷鎓,宜為含氮鎓、含硫鎓。含氮鎓可列舉:銨陽離子、哌啶鎓陽離子、吡咯啶鎓陽離子、吡啶鎓陽離子、具有二氫吡咯骨架之陽離子、具有吡咯骨架之陽離子、咪唑鎓陽離子、四氫嘧啶鎓陽離子、二氫嘧啶鎓陽離子、吡唑鎓陽離子、吡唑啉鎓陽離子等。含硫鎓可舉例如鋶陽離子。含磷鎓可舉例如鏻陽離子。有機鎓中所含之有機基可舉例如烷基、烷氧基、烯基。理想之有機鎓之具體例可舉四烷基銨陽離子(例如三丁基甲基銨陽離子)、烷基哌啶鎓陽離子、烷基吡咯啶鎓陽離子等。Organic cation salts are in particular organic cation-anion salts. The cation contained in the organic cation salt is, for example, an organic onium containing an organic group. The onium contained in the organic onium includes, for example, nitrogen-containing onium, sulfur-containing onium, and phosphonium-containing onium, preferably nitrogen-containing onium and sulfur-containing onium. Examples of nitrogen-containing onium include: ammonium cation, piperidinium cation, pyrrolidinium cation, pyridinium cation, cation having a dihydropyrrole skeleton, cation having a pyrrole skeleton, imidazolium cation, tetrahydropyrimidinium cation, dihydropyrimidine Onium cation, pyrazolium cation, pyrazolinium cation, etc. The sulfur-containing onium can be exemplified by a caldium cation. Phosphonium-containing oniums include, for example, phosphonium cations. The organic group contained in the organic onium includes, for example, an alkyl group, an alkoxy group, and an alkenyl group. Specific examples of ideal organic onium include tetraalkylammonium cations (such as tributylmethylammonium cations), alkylpiperidinium cations, alkylpyrrolidinium cations, and the like.

有機陽離子鹽所含之陰離子可舉於上針對無機陽離子所述之物。理想之有機陽離子鹽可舉例如1-乙-3-甲基咪唑鎓雙(氟磺醯基)醯亞胺、三甲基丁基銨雙(三氟甲磺醯基)醯亞胺等。The anions contained in the organic cation salts may be those mentioned above for the inorganic cations. Desirable organic cation salts include, for example, 1-ethyl-3-methylimidazolium bis(fluorosulfonyl)imide, trimethylbutylammonium bis(trifluoromethanesulfonyl)imide, and the like.

黏著劑組成物(I)中,亦可組合無機陽離子鹽與有機陽離子鹽來使用。In the adhesive composition (I), an inorganic cation salt and an organic cation salt may be used in combination.

相對於聚合物(A)100重量份,導電劑之摻混量例如為0.5重量份以上,亦可為1.0重量份以上、2.0重量份以上、3.0重量份以上,更可為4.0重量份以上。相對於聚合物(A)100重量份,導電劑之摻混量例如為20重量份以下,亦可為15重量份以下、10重量份以下、小於10重量份、9.0重量份以下、8.0重量份以下、7.0重量份以下、6.0重量份以下,更可為5.0重量份以下。相對於聚合物(A)100重量份,導電劑之摻混量亦可為5.0重量份~10重量份。With respect to 100 parts by weight of the polymer (A), the blending amount of the conductive agent is, for example, 0.5 parts by weight or more, may be 1.0 parts by weight or more, 2.0 parts by weight or more, 3.0 parts by weight or more, and may be 4.0 parts by weight or more. With respect to 100 parts by weight of the polymer (A), the blending amount of the conductive agent is, for example, 20 parts by weight or less, or 15 parts by weight or less, 10 parts by weight or less, less than 10 parts by weight, 9.0 parts by weight or less, or 8.0 parts by weight Less than, 7.0 parts by weight or less, 6.0 parts by weight or less, more preferably 5.0 parts by weight or less. With respect to 100 parts by weight of the polymer (A), the blending amount of the conductive agent may be 5.0 parts by weight to 10 parts by weight.

如上述,在本實施形態中,聚合物(A)之相對介電常數P為5.0以上。相對介電常數P如所述程度般高之聚合物(A)可促進導電劑、尤其是促進離子性化合物之游離,而可使離子傳導率提升。即,若藉由聚合物(A),有可抑制導電劑之摻混量、且可降低黏著片1之表面電阻值的傾向。並且,若藉由聚合物(A),有還可抑制導電劑在高溫環境下從黏著片1析出之傾向。若導電劑在高溫環境下之析出受到抑制,便有可降低以上述試驗方法1所測定之霧度H、並可抑制來自影像顯示裝置之光產生不需要之著色的傾向。As mentioned above, in this embodiment, the relative dielectric constant P of a polymer (A) is 5.0 or more. The polymer (A) whose relative permittivity P is as high as the above-mentioned degree can promote the release of a conductive agent, especially an ionic compound, and can improve ion conductivity. That is, if the polymer (A) is used, the blending amount of the conductive agent can be suppressed, and the surface resistance value of the adhesive sheet 1 tends to be lowered. In addition, the polymer (A) tends to suppress the precipitation of the conductive agent from the adhesive sheet 1 in a high-temperature environment. If the precipitation of the conductive agent is suppressed in a high-temperature environment, the haze H measured by the above-mentioned test method 1 tends to be reduced, and unnecessary coloring of the light from the image display device tends to be suppressed.

<添加劑> 黏著劑組成物(I)亦可包含有其他添加劑。添加劑之例為:交聯劑、矽烷耦合劑、顏料及染料等著色劑、紫外線吸收劑、界面活性劑、塑化劑、增黏劑、表面潤滑劑、調平劑、重工提升劑、軟化劑、抗氧化劑、抗老化劑、光穩定劑、聚合抑制劑、防鏽劑、無機充填材、有機充填材、金屬粉等之粉體、粒子、箔狀物。相對於聚合物(A)100重量份,添加劑可以例如10重量份以下、宜為5重量份以下、較宜為1重量份以下之範圍摻混。 <Additives> The adhesive composition (I) may also contain other additives. Examples of additives are: crosslinking agent, silane coupling agent, colorant such as pigment and dye, ultraviolet absorber, surfactant, plasticizer, tackifier, surface lubricant, leveling agent, heavy industry enhancer, softener , Antioxidants, antiaging agents, light stabilizers, polymerization inhibitors, antirust agents, inorganic fillers, organic fillers, metal powders, etc., powders, particles, and foils. The additive can be blended in a range of, for example, 10 parts by weight or less, preferably 5 parts by weight or less, more preferably 1 part by weight or less, with respect to 100 parts by weight of the polymer (A).

交聯劑之例為有機系交聯劑及多官能性金屬螯合物。有機系交聯劑之例為異氰酸酯系交聯劑、過氧化物系交聯劑、環氧系交聯劑及亞胺系交聯劑。有機系交聯劑及多官能性金屬螯合物亦可對溶劑型及活性能量線硬化型中之任一型之黏著劑組成物使用。黏著劑組成物(I)為溶劑型時,交聯劑宜為過氧化物系交聯劑、異氰酸酯系交聯劑。亦可併用過氧化物系交聯劑與異氰酸酯系交聯劑。黏著劑組成物(I)宜包含過氧化物系交聯劑。Examples of crosslinking agents are organic crosslinking agents and polyfunctional metal chelate compounds. Examples of organic crosslinking agents are isocyanate crosslinking agents, peroxide crosslinking agents, epoxy crosslinking agents and imine crosslinking agents. Organic cross-linking agents and polyfunctional metal chelates can also be used for any type of adhesive composition of solvent type and active energy ray curing type. When the adhesive composition (I) is solvent-based, the crosslinking agent is preferably a peroxide-based crosslinking agent or an isocyanate-based crosslinking agent. A peroxide-based crosslinking agent and an isocyanate-based crosslinking agent may also be used in combination. The adhesive composition (I) preferably contains a peroxide-based crosslinking agent.

過氧化物系交聯劑可列舉例如:二(2-乙基己基)過氧二碳酸酯、二(4-三級丁基環己基)過氧二碳酸酯、二-二級丁基過氧二碳酸酯、三級丁基過氧新癸酸酯、過氧三甲基乙酸三級己酯、過氧三甲基乙酸三級丁酯、二月桂醯基過氧化物、二正辛醯基過氧化物、1,1,3,3-四甲基丁基過氧基-2-乙基己酸酯、二(4-甲基苯甲醯基)過氧化物、苯甲醯基過氧化物、三級丁基過氧異丁酸酯、1,1-二(三級己基過氧基)環己烷等,由交聯反應效率優異來看,宜為苯甲醯基過氧化物。Examples of peroxide-based crosslinking agents include bis(2-ethylhexyl)peroxydicarbonate, bis(4-tertiary butylcyclohexyl)peroxydicarbonate, di-secondary butylperoxydicarbonate, Dicarbonate, tertiary butyl peroxyneodecanoate, tertiary hexyl peroxytrimethylacetate, tertiary butyl peroxytrimethylacetate, dilauroyl peroxide, di-n-octyl peroxide substances, 1,1,3,3-tetramethylbutylperoxy-2-ethylhexanoate, bis(4-methylbenzoyl) peroxide, benzoyl peroxide, Tertiary butylperoxyisobutyrate, 1,1-di(tertiary hexylperoxy)cyclohexane, etc., are preferably benzoyl peroxide in terms of excellent crosslinking reaction efficiency.

異氰酸酯系交聯劑可列舉例如:二異氰酸甲苯酯、氯伸苯基二異氰酸酯、二苯甲烷二異氰酸酯、二甲苯二異氰酸酯及聚亞甲基聚苯基異氰酸酯等芳香族異氰酸酯化合物;伸環戊基二異氰酸酯、伸環己基二異氰酸酯、經氫化之二苯甲烷二異氰酸酯及異佛酮二異氰酸酯等脂環族異氰酸酯化合物;伸丁基二異氰酸酯、四亞甲基二異氰酸酯及六亞甲基二異氰酸酯等脂肪族異氰酸酯化合物。異氰酸酯系交聯劑亦可為:將上述異氰酸酯化合物加成至三羥甲丙烷等多元醇化合物而成之化合物(加成物);使上述異氰酸酯化合物與聚醚多元醇、聚酯多元醇、丙烯酸多元醇、聚丁二烯多元醇及聚異戊二烯多元醇等多元醇進行加成反應而成之化合物;三聚異氰酸酯化物等上述異氰酸酯化合物的衍生物。衍生物之具體例為:三羥甲丙烷/二異氰酸甲苯酯三聚物加成物(例如Nippon Polyurethane Industry製CORONATE L)、三羥甲丙烷/六亞甲基二異氰酸酯三聚物加成物(例如Nippon Polyurethane Industry製CORONATE HL)、六亞甲基二異氰酸酯之三聚異氰酸酯體(例如Nippon Polyurethane Industry製CORONATE HX)。Isocyanate-based crosslinking agents include, for example, aromatic isocyanate compounds such as toluene diisocyanate, chlorophenylene diisocyanate, diphenylmethane diisocyanate, xylene diisocyanate, and polymethylene polyphenylisocyanate; Alicyclic isocyanate compounds such as pentyl diisocyanate, cyclohexylene diisocyanate, hydrogenated diphenylmethane diisocyanate and isophorone diisocyanate; butylene diisocyanate, tetramethylene diisocyanate and hexamethylene diisocyanate Aliphatic isocyanate compounds such as isocyanates. The isocyanate-based crosslinking agent can also be: a compound (adduct) obtained by adding the above-mentioned isocyanate compound to a polyol compound such as trimethylolpropane; Polyols, polybutadiene polyols, polyisoprene polyols and other polyols through the addition reaction of polyols; derivatives of the above isocyanate compounds such as isocyanate isocyanate. Specific examples of derivatives include trimethylolpropane/cresyl diisocyanate trimer adducts (such as CORONATE L manufactured by Nippon Polyurethane Industry), trimethylolpropane/hexamethylene diisocyanate trimer adducts (for example, CORONATE HL manufactured by Nippon Polyurethane Industry), trimeric isocyanate body of hexamethylene diisocyanate (for example, CORONATE HX manufactured by Nippon Polyurethane Industry).

黏著劑組成物(I)包含交聯劑時,相對於聚合物(A)100重量份,交聯劑之摻混量例如為0.01~10重量份,可為0.1~5重量份、0.1~3重量份,更可為0.1~1重量份。交聯劑過少時,有時會在耐久性試驗中發生發泡、或加工性惡化。交聯劑過多時,有時會在耐久性試驗中發生剝落、或表面電阻值上升使抗靜電性變差。When the adhesive composition (I) contains a crosslinking agent, the blending amount of the crosslinking agent is, for example, 0.01 to 10 parts by weight, 0.1 to 5 parts by weight, 0.1 to 3 parts by weight relative to 100 parts by weight of the polymer (A). parts by weight, more preferably 0.1 to 1 part by weight. When the crosslinking agent is too small, foaming may occur in a durability test or processability may deteriorate. When the crosslinking agent is too large, peeling may occur in the durability test, or the surface resistance value may increase and the antistatic property may deteriorate.

矽烷耦合劑之具體例可列舉例如:3-環氧丙氧基丙基三甲氧基矽烷、3-環氧丙氧基丙基三乙氧基矽烷、3-環氧丙氧基丙基甲基二乙氧基矽烷、2-(3-4-環氧環己基)乙基三甲氧基矽烷等含環氧基之矽烷耦合劑;3-胺丙基三甲氧基矽烷、N-2-(胺乙基)-3-胺丙基甲基二甲氧基矽烷、3-三乙氧基矽基-N-(1,3-二甲基亞丁基)丙胺、N-苯基-γ-胺丙基三甲氧基矽烷等含胺基之矽烷耦合劑;3-丙烯醯氧基丙基三甲氧基矽烷、3-甲基丙烯醯氧丙基三乙氧基矽烷等含(甲基)丙烯醯基之矽烷耦合劑;3-異氰酸酯丙基三乙氧基矽烷等含異氰酸酯基之矽烷耦合劑等。Specific examples of silane coupling agents include, for example: 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-glycidoxypropylmethyl Diethoxysilane, 2-(3-4-epoxycyclohexyl)ethyltrimethoxysilane and other epoxy-containing silane coupling agents; 3-aminopropyltrimethoxysilane, N-2-(amine Ethyl)-3-aminopropylmethyldimethoxysilane, 3-triethoxysilyl-N-(1,3-dimethylbutylene)propylamine, N-phenyl-γ-aminopropyl Amino-containing silane coupling agents such as trimethoxysilane; 3-acryloxypropyltrimethoxysilane, 3-methacryloxypropyltriethoxysilane, etc. silane coupling agent; 3-isocyanate propyltriethoxysilane and other silane coupling agents containing isocyanate groups.

黏著劑組成物(I)包含矽烷耦合劑時,相對於聚合物(A)100重量份,矽烷耦合劑之摻混量例如為5重量份以下,亦可為3重量份以下、1重量份以下、0.5重量份以下、0.2重量份以下、0.1重量份以下,更可為0.05重量份以下。When the adhesive composition (I) contains a silane coupling agent, the blending amount of the silane coupling agent is, for example, not more than 5 parts by weight, or not more than 3 parts by weight, or not more than 1 part by weight relative to 100 parts by weight of the polymer (A). , 0.5 parts by weight or less, 0.2 parts by weight or less, 0.1 parts by weight or less, more preferably 0.05 parts by weight or less.

黏著劑組成物(I)之類型例如為乳膠型、溶劑型(溶液型)、活性能量線(光硬化型)、熱熔融型(熱熔型)等。由可形成耐久性優異之黏著片1之觀點來看,黏著劑組成物(I)可為溶劑型或活性能量線硬化型,亦可為溶劑型。溶劑型黏著劑組成物(I)亦可不含紫外線硬化劑等光硬化劑。The type of the adhesive composition (I) is, for example, latex type, solvent type (solution type), active energy ray (photocurable type), heat-melt type (hot-melt type), and the like. From the viewpoint of being able to form the adhesive sheet 1 with excellent durability, the adhesive composition (I) may be a solvent type, an active energy ray curing type, or a solvent type. The solvent-based adhesive composition (I) may not contain photocuring agents such as ultraviolet curing agents.

黏著片1可藉由以下方法由黏著劑組成物(I)製作。關於溶劑型,例如可將黏著劑組成物(I)、或黏著劑組成物(I)與溶劑之混合物塗佈於基材薄膜而形成塗佈膜,並將所形成之塗佈膜乾燥而形成黏著片1。黏著劑組成物(I)會因乾燥時之熱而熱硬化。關於活性能量線硬化型(光硬化型),例如可將下述混合物塗佈於基材薄膜,並對所形成之塗佈膜照射活性能量線而形成黏著片1,該混合物為藉由聚合而成為聚合物(A)之單體(群)、以及視需求之單體(群)之部分聚合物、聚合引發劑、添加劑及溶劑等之混合物。在照射活性能量線前,亦可將塗佈膜乾燥而去除溶劑。基材薄膜亦可為塗佈面經剝離處理之薄膜(剝離襯材)。The adhesive sheet 1 can be produced from the adhesive composition (I) by the following method. Regarding the solvent type, for example, the adhesive composition (I) or a mixture of the adhesive composition (I) and a solvent can be applied to a substrate film to form a coating film, and the formed coating film can be dried to form Adhesive sheet 1. The adhesive composition (I) is thermally cured by heat during drying. Regarding the active energy ray curing type (photocuring type), for example, the following mixture can be coated on a base film, and the formed coating film can be irradiated with active energy rays to form the adhesive sheet 1 . A mixture of the monomer (group) to be the polymer (A), and a partial polymer of the monomer (group) if necessary, a polymerization initiator, an additive, a solvent, and the like. Before irradiating active energy rays, the coating film may be dried to remove the solvent. The base film may be a film (release liner) whose coated surface has been released.

形成於基材薄膜上之黏著片1可轉印至任意層上。又,基材薄膜亦可為偏光板2,此時可獲得包含黏著片1與偏光板2之光學積層體10A。The adhesive sheet 1 formed on the base film can be transferred to any layer. In addition, the base film may be the polarizing plate 2, and in this case, an optical laminate 10A including the adhesive sheet 1 and the polarizing plate 2 can be obtained.

塗佈於基材薄膜上可採用公知方法。塗佈可藉由例如輥塗、接觸輥塗佈、凹版塗佈、反向塗佈、輥刷、噴塗、浸漬輥塗佈、棒塗、刮刀塗佈(knife coat)、氣刀塗佈、簾塗佈、唇塗、利用模塗機等的擠壓式塗佈來實施。A known method can be used for coating on a base film. Coating can be performed by, for example, roll coating, touch roll coating, gravure coating, reverse coating, roll brush coating, spray coating, dip roll coating, rod coating, knife coat, air knife coating, curtain coating, etc. Coating, lip coating, and extrusion coating using a die coater or the like are performed.

關於溶劑型,塗佈後之乾燥溫度例如為40~200℃。乾燥時間例如為5秒~20分鐘,亦可為5秒~10分鐘,更可為10秒~5分鐘。關於活性能量線硬化型,進行塗佈後之乾燥時的乾燥溫度及乾燥時間亦可為上述範圍。Regarding the solvent type, the drying temperature after coating is, for example, 40 to 200°C. The drying time is, for example, 5 seconds to 20 minutes, 5 seconds to 10 minutes, or 10 seconds to 5 minutes. Regarding the active energy ray curing type, the drying temperature and drying time when drying after coating may be within the above-mentioned ranges.

塗佈於基材薄膜之組成物及混合物宜具有適於處理及塗敷之黏度。因此,關於活性能量線硬化型,塗佈之混合物宜包含單體(群)之部分聚合物。Compositions and mixtures applied to substrate films preferably have a viscosity suitable for handling and coating. Therefore, regarding the active energy ray curing type, the coating mixture preferably contains a partial polymer of the monomer (group).

黏著片1之厚度例如為2µm~55µm,亦可為2µm~30µm,5µm~25µm,更可為10µm~20µm。The thickness of the adhesive sheet 1 is, for example, 2 µm to 55 µm, 2 µm to 30 µm, 5 µm to 25 µm, or 10 µm to 20 µm.

黏著片1對玻璃之黏著力宜為1.0N/25mm以上,較宜為1.5N/25mm以上,更宜為2.0N/25mm以上。黏著力若在所述範圍內,對影像顯示面板之密著性便佳,且重工性優異。黏著力的上限例如為6.0N/25mm。The adhesive force of the adhesive sheet 1 to glass is preferably 1.0 N/25mm or higher, more preferably 1.5 N/25 mm or higher, more preferably 2.0 N/25 mm or higher. If the adhesive force is within the above range, the adhesion to the image display panel will be good, and the reworkability will be excellent. The upper limit of the adhesive force is, for example, 6.0 N/25 mm.

本實施形態中,以穿透型電子顯微鏡(TEM)觀察黏著片1之截面時,於長6µm×寬6µm範圍內之領域的最大徑宜為150nm以下。本說明書中,領域意指形成於黏著片中之海島結構的島狀相。領域通常係觀察到實質上為圓形之島狀區域。In this embodiment, when the cross-section of the adhesive sheet 1 is observed with a transmission electron microscope (TEM), the maximum diameter of the area within the range of 6 µm in length and 6 µm in width is preferably 150 nm or less. In this specification, domain means an island-like phase of a sea-island structure formed in an adhesive sheet. Fields are usually observed as substantially circular island-like regions.

領域之最大徑可藉由以下方法特定。首先,切斷黏著片1,以TEM觀察截面。此時的放大倍率例如為20,000倍。在TEM影像中,特定出存在於長6µm×寬6µm之範圍內的領域。針對所特定之各領域,特定出徑長(可包圍領域之最小圓的直徑)。特定出之徑長中,可將最大值視為領域之最大徑。The maximum diameter of the field can be specified by the following method. First, the adhesive sheet 1 is cut, and the cross section is observed with TEM. The magnification at this time is, for example, 20,000 times. In the TEM image, a domain within a range of 6 µm in length and 6 µm in width was identified. For each specific field, specify the length of the exit diameter (the diameter of the smallest circle that can enclose the field). Among the specified out-of-path lengths, the maximum value can be regarded as the maximum diameter of the field.

領域的最大徑宜為70nm以下。本實施形態中,以TEM觀察黏著片1之截面時,在20,000倍之放大倍率下未見到領域則尤佳。The maximum diameter of the domain is preferably 70 nm or less. In this embodiment, when the cross section of the adhesive sheet 1 is observed by TEM, it is particularly preferable that no domain is seen at a magnification of 20,000 times.

(偏光板) 偏光板2例如為包含偏光件及保護薄膜(透明保護薄膜)之積層體。透明保護薄膜例如係配置成與層狀偏光件之主面(具有最寬廣面積之表面)相接。偏光件亦可配置於2個透明保護薄膜之間。 (polarizer) The polarizing plate 2 is, for example, a laminate including a polarizer and a protective film (transparent protective film). The transparent protective film is arranged, for example, so as to be in contact with the principal surface (the surface having the widest area) of the layered polarizer. The polarizer can also be arranged between two transparent protective films.

偏光件無特別限定,可舉例如使聚乙烯醇系薄膜、部分縮甲醛化聚乙烯醇系薄膜、乙烯-乙酸乙烯酯共聚物系部分皂化薄膜等親水性高分子薄膜吸附碘、二色性染料等二色性物質並單軸延伸者;聚乙烯醇之脫水處理物、聚氯乙烯之脫鹽酸處理物等多烯系定向薄膜等。偏光件宜由聚乙烯醇系薄膜及碘等二色性物質構成。The polarizer is not particularly limited, and for example, hydrophilic polymer films such as polyvinyl alcohol-based films, partially formalized polyvinyl alcohol-based films, and ethylene-vinyl acetate copolymer-based partially saponified films absorb iodine and dichroic dyes. Such as dichroic substances and uniaxially stretched ones; polyene-based oriented films such as dehydrated polyvinyl alcohol and polyvinyl chloride dehydrochloridized products, etc. The polarizer is preferably composed of a polyvinyl alcohol-based film and a dichroic substance such as iodine.

偏光件之厚度無特別限定,例如為80µm以下,亦可為50µm以下,更可為30µm以下。偏光件之厚度的下限值無特別限定,例如為1µm,亦可為10µm,更可為20µm。偏光件亦可為厚度為10µm以下、宜為1~7µm之薄型偏光件。薄型偏光件的厚度參差少,從而視辨性優異。薄型偏光件之尺寸變化受到抑制,從而耐久性優異。根據薄型偏光件,可將偏光板2薄型化。The thickness of the polarizer is not particularly limited, for example, it may be less than 80 µm, it may be less than 50 µm, and it may be less than 30 µm. The lower limit of the thickness of the polarizer is not particularly limited, for example, it may be 1 µm, it may be 10 µm, and it may be 20 µm. The polarizer can also be a thin polarizer with a thickness of 10µm or less, preferably 1-7µm. The thin polarizer has less variation in thickness and thus has excellent visibility. The dimensional change of the thin polarizer is suppressed, so that it is excellent in durability. According to the thin polarizer, the thickness of the polarizing plate 2 can be reduced.

透明保護薄膜之材料可使用例如透明性、機械強度、熱穩定性、水分阻隔性、各向同性等優異之熱塑性樹脂。所述熱塑性樹脂的具體例可列舉例如:三醋酸纖維素等之纖維素樹脂、聚酯樹脂、聚醚碸樹脂、聚碸樹脂、聚碳酸酯樹脂、聚醯胺樹脂、聚醯亞胺樹脂、聚烯烴樹脂、(甲基)丙烯酸樹脂、環狀聚烯烴樹脂(降𦯉烯系樹脂)、聚芳酯樹脂、聚苯乙烯樹脂、聚乙烯醇樹脂及該等之混合物。透明保護薄膜之材料亦可為(甲基)丙烯酸系、胺甲酸酯系、丙烯酸胺甲酸酯系、環氧系、聚矽氧系等熱硬化性樹脂或紫外線硬化型樹脂。偏光板2具有2個透明保護薄膜時,2個透明保護薄膜之材料可互同亦可互異。例如,亦可對偏光件之一主面透過接著劑貼合有以熱塑性樹脂構成之透明保護薄膜,且對偏光件之另一主面貼合有以熱硬化性樹脂或紫外線硬化型樹脂構成之透明保護薄膜。透明保護薄膜亦可包含有1種以上任意之添加劑。添加劑可列舉例如:紫外線吸收劑、抗氧化劑、滑劑、塑化劑、脫模劑、抗著色劑、阻燃劑、成核劑、抗靜電劑、顏料、著色劑等。As the material of the transparent protective film, for example, a thermoplastic resin excellent in transparency, mechanical strength, heat stability, moisture barrier property, isotropy, etc. can be used. Specific examples of the thermoplastic resin include, for example, cellulose resins such as cellulose triacetate, polyester resins, polyether resins, polyresins, polycarbonate resins, polyamide resins, polyimide resins, Polyolefin resins, (meth)acrylic resins, cyclic polyolefin resins (northylene-based resins), polyarylate resins, polystyrene resins, polyvinyl alcohol resins, and mixtures thereof. The material of the transparent protective film can also be thermosetting resins such as (meth)acrylic, urethane, acrylic urethane, epoxy, polysiloxane or ultraviolet curable resins. When the polarizing plate 2 has two transparent protective films, the materials of the two transparent protective films may be the same or different from each other. For example, a transparent protective film made of thermoplastic resin may be attached to one main surface of the polarizer through an adhesive, and a film made of thermosetting resin or ultraviolet curable resin may be attached to the other main surface of the polarizer. Transparent protective film. The transparent protective film may also contain one or more optional additives. Examples of additives include ultraviolet absorbers, antioxidants, slip agents, plasticizers, release agents, anti-coloring agents, flame retardants, nucleating agents, antistatic agents, pigments, and colorants.

透明保護薄膜之透濕度無特別限定,可為200g/(m 2・day)以下,亦可為50g/(m 2・day)以下。此時,可抑制空氣中的水分侵入偏光板2之內部,而可抑制偏光板2之水分率的變化。藉此,可在保存時等抑制偏光板2發生捲曲或尺寸變化。又,透明保護薄膜之透濕度愈低,愈有黏著片1中之導電劑不易溢出之傾向,而有可抑制黏著片1之表面電阻值隨時間之上升之傾向。形成透濕度低之透明保護薄膜的材料可列舉例如:聚酯系聚合物、聚碳酸酯系聚合物、芳酯系聚合物、醯胺系聚合物、烯烴系聚合物、環狀烯烴系聚合物、(甲基)丙烯酸系聚合物及該等之混合物。 The moisture permeability of the transparent protective film is not particularly limited, and may be less than 200g/(m 2 ·day) or less than 50g/(m 2 ·day). At this time, moisture in the air can be suppressed from invading into the polarizing plate 2 , so that changes in the moisture content of the polarizing plate 2 can be suppressed. Thereby, curling and dimensional changes of the polarizing plate 2 can be suppressed during storage or the like. Also, the lower the moisture permeability of the transparent protective film, the less likely the conductive agent in the adhesive sheet 1 will overflow, and the tendency to suppress the increase in the surface resistance of the adhesive sheet 1 over time. Materials for forming a transparent protective film with low moisture permeability include, for example, polyester-based polymers, polycarbonate-based polymers, arylate-based polymers, amide-based polymers, olefin-based polymers, and cyclic olefin-based polymers , (meth)acrylic polymers and mixtures thereof.

透明保護薄膜之透濕度可依循JIS Z0208:1976之透濕度試驗(透濕杯法),藉由以下方法來測定。首先,將透明保護薄膜切斷成直徑60mm,準備測定試樣。接著,將測定試樣安裝於配置有約15g之氯化鈣的透濕杯中。將該透濕杯配置在設定成溫度40℃、濕度92%RH之恆溫機中,放置24小時,藉此進行透濕度試驗。藉由測定氯化鈣在試驗前後之重量的增加量,可特定透明保護薄膜之透濕度。The moisture permeability of the transparent protective film can be measured by the following method in accordance with the moisture permeability test (moisture permeability cup method) of JIS Z0208:1976. First, the transparent protective film was cut into a diameter of 60 mm to prepare a measurement sample. Next, the measurement sample was attached to the moisture-permeable cup in which about 15 g of calcium chloride was placed. The moisture permeable cup was placed in a constant temperature machine set at a temperature of 40°C and a humidity of 92%RH, and left for 24 hours to perform a moisture permeability test. By measuring the weight increase of calcium chloride before and after the test, the moisture permeability of the transparent protective film can be specified.

保護薄膜之厚度可適當決定,惟一般由強度或操作性等作業性、薄膜性等方面來看,為10~200µm左右。The thickness of the protective film can be determined appropriately, but it is generally about 10~200µm in terms of workability such as strength and operability, and film properties.

偏光件與透明保護薄膜通常係透過水系接著劑等密著。就水系接著劑而言,可例示異氰酸酯系接著劑、聚乙烯醇系接著劑、明膠系接著劑、乙烯基系乳膠、水系聚胺甲酸酯、水系聚酯等。上述接著劑以外之其他接著劑可舉紫外線硬化型接著劑、電子束硬化型接著劑等。電子束硬化型偏光板用接著劑係對各種透明保護薄膜展現適宜之接著性。接著劑亦可包含有金屬化合物填料。The polarizer and the transparent protective film are usually adhered through water-based adhesives or the like. Examples of the water-based adhesive include isocyanate-based adhesives, polyvinyl alcohol-based adhesives, gelatin-based adhesives, vinyl-based latex, water-based polyurethane, and water-based polyester. Adhesives other than the above adhesives include ultraviolet curable adhesives, electron beam curable adhesives, and the like. Adhesives for electron beam hardening type polarizing plates exhibit suitable adhesiveness to various transparent protective films. The adhesive may also contain metallic compound fillers.

偏光板中,亦可於偏光件上形成相位差薄膜等來取代透明保護薄膜。透明保護薄膜上亦可進一步設置其他透明保護薄膜、設置相位差薄膜等。In the polarizing plate, a retardation film or the like may be formed on the polarizer instead of the transparent protective film. On the transparent protective film, another transparent protective film, a retardation film, etc. may be further provided.

關於透明保護薄膜,可於與偏光件接著之表面之相對向表面設置有硬塗層,亦可施行為了抗反射、抗黏、擴散、防眩等之處理。With regard to the transparent protective film, a hard coat layer may be provided on the surface opposite to the surface attached to the polarizer, or it may be treated for anti-reflection, anti-adhesion, diffusion, and anti-glare.

偏光板2之單體透射率例如為40%~43%。偏光板2之單體透射率係藉由JIS Z8701:1999之2度視野(C光源)進行視感度校正後之Y值。單體透射率可使用村上色彩技術研究所製之DOT-3等市售之分光光度計來測定。單體透射率的測定波長為380~700nm(每10nm)。The single transmittance of the polarizing plate 2 is, for example, 40%-43%. The single-body transmittance of the polarizing plate 2 is the Y value after the sensitivity is corrected according to the 2-degree field of view (C light source) of JIS Z8701:1999. The single transmittance can be measured using a commercially available spectrophotometer such as DOT-3 manufactured by Murakami Color Technology Laboratory. The measurement wavelength of monomer transmittance is 380~700nm (every 10nm).

此外,偏光板2亦可不具備抑制碘透過之層。抑制碘透過之層例如為具有包含源自下述式(2)所示之單體之結構單元的含硼之丙烯酸系樹脂之層,詳細而言其係包含藉由將單體混合物聚合而得之共聚物的層,該單體混合物包含大於50重量份之(甲基)丙烯酸系單體與大於0重量份且小於50重量份之下述式(2)所示之單體。式(2)之X表示包含反應性基之官能基,且該反應性基係選自於由乙烯基、(甲基)丙烯醯基、苯乙烯基、(甲基)丙烯醯胺基、乙烯基醚基、環氧基、氧雜環丁烷基、羥基、胺基、醛基及羧基所構成群組中之至少1種反應性基。式(2)之R 1及R 2分別獨立表示氫原子、可具有取代基之脂肪族烴基、可具有取代基之芳基或可具有取代基之雜環基,R 1及R 2可相互連結形成環。 [化學式2] In addition, the polarizing plate 2 does not have to have a layer for suppressing transmission of iodine. The layer that inhibits iodine permeation is, for example, a layer of a boron-containing acrylic resin having a structural unit derived from a monomer represented by the following formula (2). Specifically, it includes a layer obtained by polymerizing a monomer mixture. In the layer of the copolymer, the monomer mixture comprises more than 50 parts by weight of a (meth)acrylic monomer and more than 0 parts by weight and less than 50 parts by weight of a monomer represented by the following formula (2). X in formula (2) represents a functional group comprising a reactive group, and the reactive group is selected from vinyl, (meth)acryl, styryl, (meth)acrylamide, ethylene At least one reactive group selected from the group consisting of ether group, epoxy group, oxetanyl group, hydroxyl group, amine group, aldehyde group and carboxyl group. R 1 and R 2 of formula (2) independently represent a hydrogen atom, an aliphatic hydrocarbon group that may have a substituent, an aryl group that may have a substituent or a heterocyclic group that may have a substituent, and R 1 and R 2 may be connected to each other Form a ring. [chemical formula 2]

舉一例來說,本實施形態之光學積層體10A係排除下述偏光板,該偏光板具有: 偏光件、設於該偏光件之一側的保護層、設於該偏光件之另一側的抑制碘透過之層、及設於該抑制碘透過之層之與該偏光件為相反側的黏著劑層; 該抑制碘透過之層為樹脂之有機溶劑溶液的塗佈膜之固化物或熱硬化物; 構成該黏著劑層之黏著劑組成物包含基底聚合物與抗靜電劑; 該基底聚合物之玻璃轉移溫度為-50℃以下、及在100kHz下之介電常數為5.0以上; 該黏著劑層之表面電阻值為1.0×10 9Ω/□以下。 For example, the optical laminate 10A of this embodiment excludes the following polarizing plate, which has: a polarizer, a protective layer disposed on one side of the polarizer, and a protective layer disposed on the other side of the polarizer. A layer for inhibiting iodine transmission, and an adhesive layer disposed on the opposite side of the layer for inhibiting iodine transmission from the polarizer; the layer for inhibiting iodine transmission is a cured product or thermally cured coating film of an organic solvent solution of a resin The adhesive composition constituting the adhesive layer includes a base polymer and an antistatic agent; the glass transition temperature of the base polymer is below -50°C, and the dielectric constant at 100kHz is above 5.0; the adhesive The surface resistance value of the layer is 1.0×10 9 Ω/□ or less.

偏光板2之形狀例如在俯視下為矩形,亦可非為異形。詳細而言,偏光板2亦可不具有異形加工部。異形加工部可舉貫通孔、隅部之去角、俯視時成為凹部之切削加工部等。凹部之具體例可舉近似船形之形狀、近似浴缸形狀之形狀、V字缺口、U字缺口。異形加工部之另一例可舉與汽車之儀表盤對應之形狀。該形狀係其外緣形成沿循儀表針之旋轉方向的圓弧狀,且包含外緣形成往面方向內側凸出之V字形狀(包含弧狀)之部位。The shape of the polarizer 2 is, for example, rectangular in plan view, and may not be irregular. Specifically, the polarizing plate 2 does not need to have the irregularly processed portion. Irregularly processed parts include through holes, chamfered corners, and cut parts that become concave parts when viewed from above. Specific examples of the recess include a boat-like shape, a bathtub-like shape, a V-shaped notch, and a U-shaped notch. Another example of the special-shaped processing part is a shape corresponding to the dashboard of an automobile. The shape is that the outer edge forms a circular arc along the direction of rotation of the instrument needle, and includes a part where the outer edge forms a V-shape (including an arc) protruding inward in the surface direction.

舉一例來說,本實施形態之光學積層體10A係排除下述偏光板,該偏光板係具備黏著劑層者;且該偏光板具有異形; 構成該黏著劑層之黏著劑組成物包含基底聚合物與抗靜電劑; 該基底聚合物之玻璃轉移溫度為-50℃以下、及在100kHz下之介電常數為5.0以上; 該黏著劑層之表面電阻值為1.0×10 9Ω/□以下。 For example, the optical laminate 10A of this embodiment excludes the following polarizing plate, the polarizing plate is equipped with an adhesive layer; and the polarizing plate has an irregular shape; substance and antistatic agent; the glass transition temperature of the base polymer is below -50°C, and the dielectric constant at 100kHz is above 5.0; the surface resistance of the adhesive layer is below 1.0×10 9 Ω/□.

於圖4顯示本實施形態之光學積層體之另一例。圖4之光學積層體10B具有以下積層結構:依序積層有剝離襯材3、黏著片1及偏光板2。光學積層體10B可藉由剝離剝離襯材3而作為附黏著片之偏光板使用。以下各例只要技術上不矛盾,亦可相互組合。Another example of the optical layered body of this embodiment is shown in FIG. 4 . The optical laminate 10B in FIG. 4 has the following laminated structure: a release liner 3 , an adhesive sheet 1 and a polarizing plate 2 are laminated in this order. The optical layered body 10B can be used as a polarizing plate with an adhesive sheet by peeling off the release liner 3 . The following examples can also be combined with each other as long as there is no technical contradiction.

剝離襯材3之構成材料可列舉例如:聚乙烯、聚丙烯、聚對苯二甲酸乙二酯、聚酯薄膜等之塑膠薄膜;紙、布、不織布等之多孔質材料;網狀物、發泡片、金屬箔及該等之層合體等適當的薄片體等等,由表面平滑性優異方面來看,可適宜使用塑膠薄膜。The constituent materials of the release liner 3 include, for example: plastic films such as polyethylene, polypropylene, polyethylene terephthalate, and polyester film; porous materials such as paper, cloth, and non-woven fabric; Suitable thin sheets such as blister sheets, metal foils, and their laminates can be suitably used for plastic films because of their excellent surface smoothness.

塑膠薄膜若為可保護黏著劑片1之薄膜即無特別限定,可列舉例如:聚乙烯薄膜、聚丙烯薄膜、聚丁烯薄膜、聚丁二烯薄膜、聚甲基戊烯薄膜、聚氯乙烯薄膜、氯乙烯共聚物薄膜、聚對苯二甲酸乙二酯薄膜、聚對苯二甲酸丁二酯薄膜、聚胺甲酸酯薄膜、乙烯-乙酸乙酯共聚物薄膜等。The plastic film is not particularly limited if it is a film that can protect the adhesive sheet 1, for example: polyethylene film, polypropylene film, polybutene film, polybutadiene film, polymethylpentene film, polyvinyl chloride film Film, vinyl chloride copolymer film, polyethylene terephthalate film, polybutylene terephthalate film, polyurethane film, ethylene-ethyl acetate copolymer film, etc.

剝離襯材3之厚度通常為5~200µm,宜為5~100µm左右。對於剝離襯材3,可視需要利用聚矽氧系、氟系、長鏈烷基系或脂肪醯胺系脫模劑、矽粉等進行的脫模及防污處理、或者塗佈型、捏合型、蒸鍍型等抗靜電處理。尤其,藉由對於剝離襯材3之表面適當實施聚矽氧處理、長鏈烷基處理、氟處理等剝離處理,可更提高從黏著片1剝離之剝離性。The thickness of the release liner 3 is usually 5-200 µm, preferably about 5-100 µm. For the release liner 3, release and anti-fouling treatment, coating type, kneading type, etc. , Evaporation type and other antistatic treatment. In particular, by appropriately performing a release treatment such as silicone treatment, long-chain alkyl treatment, or fluorine treatment on the surface of the release liner 3, the releasability from the adhesive sheet 1 can be further improved.

此外,如上述,亦可將製作黏著片1時利用之脫模薄膜作為剝離襯材3來使用。In addition, as mentioned above, the release film used when producing the adhesive sheet 1 can also be used as the release liner 3 .

於圖5顯示本實施形態之光學積層體之另一例。圖5之光學積層體10C具有以下積層結構:依序積層有剝離襯材3、黏著片1、相位差薄膜5、層間黏著劑4及偏光板2。光學積層體10C可在剝離剝離襯材3後,例如貼附於影像顯示單元來使用。Another example of the optical layered body of this embodiment is shown in FIG. 5 . The optical laminate 10C in FIG. 5 has the following laminate structure: a release liner 3 , an adhesive sheet 1 , a retardation film 5 , an interlayer adhesive 4 and a polarizing plate 2 are laminated in sequence. The optical layered body 10C can be used after peeling off the release liner 3, for example, by affixing it to an image display unit.

相位差膜薄膜5可使用使高分子薄膜延伸而得者或已使液晶材料定向、固定化者。相位差薄膜5例如於面內及/或厚度方向上具有雙折射。As the retardation film 5, one obtained by stretching a polymer film or one in which a liquid crystal material is oriented and fixed can be used. The retardation film 5 has birefringence, for example, in the plane and/or in the thickness direction.

相位差薄膜5可舉抗反射用相位差薄膜(參照日本專利特開2012-133303號公報[0221]、[0222]、[0228])、視角補償用相位差薄膜(參照日本專利特開2012-133303號公報[0225]、[0226])、視角補償用傾斜定向相位差薄膜(參照日本專利特開2012-133303號公報[0227])等。Retardation film 5 can enumerate retardation film for anti-reflection (refer to Japanese Patent Laid-Open No. 2012-133303 communique [0221], [0222], [0228]), viewing angle compensation retardation film (refer to Japanese Patent Laid-Open No. 2012- [0225], [0226] of Publication No. 133303), oblique orientation retardation film for viewing angle compensation (refer to [0227] of Japanese Patent Application Laid-Open No. 2012-133303), etc.

相位差薄膜5若為實質上具有上述機能者,則例如相位差值、配置角度、3維雙折射率、單層或多層等無特別限制,可使用公知之相位差薄膜。As long as the retardation film 5 substantially has the above-mentioned functions, there are no particular limitations such as retardation value, arrangement angle, three-dimensional birefringence, single layer or multilayer, and known retardation films can be used.

相位差薄膜5之厚度宜為20µm以下,較宜為10µm以下,更宜為1~9µm,尤宜為3~8µm。The thickness of the retardation film 5 is preferably less than 20 µm, more preferably less than 10 µm, more preferably 1-9 µm, especially 3-8 µm.

相位差薄膜5例如係由液晶材料經定向、固定化之1/4波長板、1/2波長板這2層構成。The retardation film 5 is composed of, for example, two layers of a 1/4 wavelength plate and a 1/2 wavelength plate in which a liquid crystal material is oriented and immobilized.

層間黏著劑4可使用公知之黏著劑。亦可將黏著片1使用於層間黏著劑4。A well-known adhesive can be used for the interlayer adhesive 4. The adhesive sheet 1 can also be used for the interlayer adhesive 4 .

於圖6顯示本實施形態之光學積層體之另一例。圖6之光學積層體10D具有以下積層結構:依序積層有剝離襯材3、黏著片1、相位差薄膜5、層間黏著劑4、偏光板2及保護薄膜6。光學積層體10D可在剝離剝離襯材3後,例如貼附於影像顯示單元來使用。Another example of the optical layered body of this embodiment is shown in FIG. 6 . The optical laminate 10D in FIG. 6 has the following laminated structure: a release liner 3 , an adhesive sheet 1 , a retardation film 5 , an interlayer adhesive 4 , a polarizing plate 2 and a protective film 6 are laminated in sequence. The optical layered body 10D can be used after peeling off the release liner 3, for example, by being attached to an image display unit.

保護薄膜6在流通及保管光學積層體10D時、以及在光學積層體10D已組入影像顯示裝置之狀態下,具有保護最外層之偏光板2的功能。又,在已組入影像顯示裝置之狀態下,亦可為作為對外部空間之視窗發揮功能的保護薄膜6。保護薄膜6典型上為樹脂薄膜。構成保護薄膜6之樹脂例如為PET等聚酯、聚乙烯及聚丙烯等聚烯烴、丙烯酸、環烯烴、聚醯亞胺以及聚醯胺,宜為聚酯。惟,保護薄膜6不受上述例所限。保護薄膜6亦可為玻璃製薄膜、或包含玻璃製薄膜之積層薄膜。於保護薄膜6亦可施有防眩、抗反射、抗靜電等之表面處理。The protective film 6 has the function of protecting the outermost polarizing plate 2 when the optical layered body 10D is distributed and stored, and when the optical layered body 10D is incorporated into an image display device. In addition, in a state where an image display device is incorporated, the protective film 6 functioning as a window to the external space may also be used. The protective film 6 is typically a resin film. The resin constituting the protective film 6 is, for example, polyester such as PET, polyolefin such as polyethylene and polypropylene, acrylic, cycloolefin, polyimide and polyamide, preferably polyester. However, the protective film 6 is not limited to the above examples. The protective film 6 may be a glass film or a laminated film including a glass film. Surface treatments such as anti-glare, anti-reflection, and anti-static can also be applied to the protective film 6 .

保護薄膜6亦可藉由任意之黏著劑接合於偏光板2。亦可藉由黏著片1來接合。The protective film 6 can also be bonded to the polarizer 2 by any adhesive. It can also be joined by the adhesive sheet 1 .

本實施形態之光學積層體例如可以將帶狀光學積層體捲繞而成之捲繞體之形態、或以單片狀光學積層體之形態進行流通及保管。本實施形態之光學積層體適於用於特別容易產生靜電之環境的影像顯示裝置之用途,尤其適於用於車載用顯示器之用途。車載用顯示器可舉例如汽車導航裝置用面板、儀表盤、鏡面顯示器等。儀表盤係顯示車輛之行進速度或引擎之旋轉數等的面板。The optical layered body of this embodiment can be distributed and stored, for example, in the form of a winding body in which a belt-shaped optical layered body is wound, or in the form of a single-sheet optical layered body. The optical layered body of this embodiment is suitable for use in image display devices in an environment where static electricity is particularly likely to be generated, and is particularly suitable for use in in-vehicle displays. Examples of in-vehicle displays include panels for car navigation devices, instrument panels, mirror displays, and the like. A dashboard is a panel that displays the speed of the vehicle or the number of revolutions of the engine, etc.

[影像顯示面板之實施形態] 於圖7顯示本實施形態之影像顯示面板之一例。圖7之影像顯示面板11A具備光學積層體10A,且更具備例如影像顯示單元30A。詳細而言,光學積層體10A係透過黏著片1貼合於影像顯示單元30A。此外,亦可使用圖4~6之光學積層體10B、10C或10D來取代光學積層體10A(惟,剝離襯材3除外)。 [Example of video display panel] An example of the video display panel of this embodiment is shown in FIG. 7 . The image display panel 11A of FIG. 7 includes an optical laminate 10A, and further includes, for example, an image display unit 30A. Specifically, the optical laminate 10A is attached to the image display unit 30A through the adhesive sheet 1 . In addition, the optical layered body 10B, 10C, or 10D of FIGS. 4 to 6 may be used instead of the optical layered body 10A (except for the release liner 3 ).

影像顯示單元30A例如具備有影像形成層32、第1透明基板31及第2透明基板33。影像形成層32例如係配置於第1透明基板31及第2透明基板33之間,且分別與第1透明基板31及第2透明基板33相接。光學積層體10A之黏著片1例如係與影像顯示單元30A之第1透明基板31相接。The image display unit 30A includes, for example, an image forming layer 32 , a first transparent substrate 31 , and a second transparent substrate 33 . The image forming layer 32 is, for example, arranged between the first transparent substrate 31 and the second transparent substrate 33 , and is in contact with the first transparent substrate 31 and the second transparent substrate 33 respectively. The adhesive sheet 1 of the optical laminate 10A is in contact with the first transparent substrate 31 of the image display unit 30A, for example.

影像形成層32例如為包含在電場不存在之狀態下沿面定向之液晶分子的液晶層。包含這類液晶分子之液晶層適於IPS(In-Plane Switching,面內切換)方式。惟,液晶層亦可用於TN(Twisted Nematic)型、STN(Super Twisted Nematic)型、π型、VA(Vertical Alignment)型等。本說明書中,有時會將具備液晶層之影像顯示單元稱為液晶單元,將具備液晶單元之影像顯示面板稱為液晶面板。此外,影像形成層32亦可為EL發光層。The image forming layer 32 is, for example, a liquid crystal layer including liquid crystal molecules that are homeotropically aligned in the absence of an electric field. A liquid crystal layer containing such liquid crystal molecules is suitable for an IPS (In-Plane Switching, in-plane switching) method. However, the liquid crystal layer can also be used in TN (Twisted Nematic) type, STN (Super Twisted Nematic) type, π type, VA (Vertical Alignment) type, etc. In this specification, an image display unit including a liquid crystal layer may be referred to as a liquid crystal unit, and an image display panel including a liquid crystal unit may be referred to as a liquid crystal panel. In addition, the image forming layer 32 can also be an EL light emitting layer.

影像形成層32之厚度例如為1.5µm~4µm。The thickness of the image forming layer 32 is, for example, 1.5 µm to 4 µm.

第1透明基板31及第2透明基板33的材料可舉例如玻璃及聚合物。在本說明書中,有時會將以聚合物構成之透明基板稱為聚合物薄膜。構成透明基板之聚合物可舉例如聚對苯二甲酸乙二酯、聚環烯烴、聚碳酸酯等。以玻璃構成之透明基板之厚度例如為0.1mm~1mm。以聚合物構成之透明基板之厚度例如為10µm~200µm。Materials of the first transparent substrate 31 and the second transparent substrate 33 can be, for example, glass and polymer. In this specification, a transparent substrate made of a polymer may be referred to as a polymer film. The polymer constituting the transparent substrate can be, for example, polyethylene terephthalate, polycycloolefin, polycarbonate, and the like. The thickness of the transparent substrate made of glass is, for example, 0.1 mm˜1 mm. The thickness of the transparent substrate made of polymer is, for example, 10 µm-200 µm.

影像顯示單元30A亦可更包含有影像形成層32、第1透明基板31及第2透明基板33以外之其他層。其他層可舉例如彩色濾光片、易接著層及硬塗層。彩色濾光片例如係配置於較影像形成層32更靠視辨側,宜位於第1透明基板31與光學積層體10A之黏著片1之間。易接著層及硬塗層例如係配置於第1透明基板31或第2透明基板33之表面上。The image display unit 30A may further include other layers other than the image forming layer 32 , the first transparent substrate 31 and the second transparent substrate 33 . Other layers include, for example, color filters, easy-adhesive layers, and hard coat layers. The color filter is arranged, for example, on the viewing side of the image forming layer 32 , preferably between the first transparent substrate 31 and the adhesive sheet 1 of the optical laminate 10A. The easy-adhesive layer and the hard coat layer are arranged, for example, on the surface of the first transparent substrate 31 or the second transparent substrate 33 .

影像顯示面板11A亦可更具備有光學積層體10A及影像顯示單元30A以外之其他構件。例如,影像顯示面板11A亦可更具備有與光學積層體10A之側面電連接之導通結構(未圖示)。若將導通結構與接地連接,便容易抑制光學積層體10A因靜電而帶電。導通結構可覆蓋光學積層體10A之側面整體,亦可局部覆蓋光學積層體10A之側面。光學積層體10A之側面的面積相對於光學積層體10A之側面整體的面積之比率例如為1%以上,宜為3%以上。The image display panel 11A may further include members other than the optical laminate 10A and the image display unit 30A. For example, the image display panel 11A may further include a conductive structure (not shown) electrically connected to the side surface of the optical laminate 10A. If the conductive structure is connected to the ground, it becomes easy to suppress electrostatic charging of the optical layered body 10A. The conduction structure may cover the entire side of the optical laminate 10A, or partially cover the side of the optical laminate 10A. The ratio of the area of the side surface of the optical layered body 10A to the area of the entire side surface of the optical layered body 10A is, for example, 1% or more, preferably 3% or more.

導通結構之材料可舉例如:以銀、金等金屬構成之導電性糊料;導電性接著劑;其他導電材料。導通結構亦可為從光學積層體10A之側面伸長的配線。The material of the conduction structure can be, for example: conductive paste made of metals such as silver and gold; conductive adhesive; other conductive materials. The conductive structure may be a wiring extending from the side surface of the optical layered body 10A.

影像顯示面板11A亦可更具備有偏光板2以外之其他光學薄膜。其他光學薄膜可舉例如偏光板、反射板、反透射板、視角補償薄膜、增亮薄膜等可用於影像顯示裝置之薄膜。影像顯示面板11A亦可具備有該等中之1種或2種以上其他光學薄膜。The image display panel 11A may further include other optical films other than the polarizer 2 . Other optical films can be, for example, polarizers, reflectors, anti-transmission films, viewing angle compensation films, brightness enhancement films and other films that can be used in image display devices. The image display panel 11A may also include one or more than two other optical films among these.

其他光學薄膜為偏光板時,該偏光板例如係透過黏著片而與影像顯示單元30A之第2透明基板33貼合。該偏光板例如具有於上針對偏光板2所述之構成。作為其他光學薄膜之偏光板中,偏光件之透射軸(或吸收軸)例如係與偏光板2中之偏光件的透射軸(或吸收軸)正交。用以貼合偏光板與第2透明基板33之黏著片的材料,可使用於上針對黏著片1所述之物。該黏著片之厚度無特別限定,例如為1~100µm,宜為2~50µm,較宜為2~40µm,更宜為5~35µm。When the other optical film is a polarizing plate, the polarizing plate is bonded to the second transparent substrate 33 of the image display unit 30A, for example, through an adhesive sheet. The polarizer has, for example, the configuration described above for the polarizer 2 . In polarizing plates used as other optical films, the transmission axis (or absorption axis) of the polarizer is, for example, perpendicular to the transmission axis (or absorption axis) of the polarizer in the polarizing plate 2 . The material of the adhesive sheet for laminating the polarizing plate and the second transparent substrate 33 can be used as described above for the adhesive sheet 1 . The thickness of the adhesive sheet is not particularly limited, for example, it is 1-100 µm, preferably 2-50 µm, more preferably 2-40 µm, more preferably 5-35 µm.

於圖8顯示本實施形態之影像顯示面板之另一例。圖8之影像顯示面板11B更具備有導電層40,該導電層40係配置於光學積層體10A及影像顯示單元30A之間。惟,影像顯示面板宜為不含導電層40之影像顯示面板11A。設有導電層40之影像顯示面板11B有反射率變高之傾向,而有時顯示器之視辨性會降低。在不含導電層40之影像顯示面板11A中,宜設置與黏著劑片1鄰接之導通部(上述導通結構)。導通部可使用例如導電性銀糊料。於影像顯示單元30A貼合光學積層體10A後,於黏著劑片1之側面部塗佈導電性銀糊料等設置導通部,並從該處導通至其他配線或影像顯示裝置之框體等,藉此可提高影像顯示面板之抗靜電性。Another example of the image display panel of this embodiment is shown in FIG. 8 . The image display panel 11B of FIG. 8 is further provided with a conductive layer 40 , and the conductive layer 40 is disposed between the optical laminate 10A and the image display unit 30A. However, the image display panel is preferably the image display panel 11A without the conductive layer 40 . The image display panel 11B provided with the conductive layer 40 tends to have high reflectance, and the visibility of the display may be reduced. In the image display panel 11A that does not contain the conductive layer 40, it is preferable to provide a conduction portion adjacent to the adhesive sheet 1 (the above-mentioned conduction structure). For the vias, for example, conductive silver paste can be used. After bonding the optical laminate 10A to the image display unit 30A, apply conductive silver paste or the like to the side of the adhesive sheet 1 to form a conduction portion, and conduct from there to other wiring or the frame of the image display device, etc. Thereby, the antistatic property of the image display panel can be improved.

導電層40例如為含導電劑之層。導電劑可使用金屬氧化物、導電性聚合物、於上針對黏著片1所述之物等。導電層40之厚度例如為5nm~180nm。導電層40之表面電阻值例如為1.0×10 6Ω/□~1.0×10 10Ω/□,宜為1.0×10 8Ω/□~1.0×10 9Ω/□。 The conductive layer 40 is, for example, a layer containing a conductive agent. As the conductive agent, metal oxides, conductive polymers, those described above for the adhesive sheet 1, and the like can be used. The thickness of the conductive layer 40 is, for example, 5 nm˜180 nm. The surface resistance of the conductive layer 40 is, for example, 1.0×10 6 Ω/□~1.0×10 10 Ω/□, preferably 1.0×10 8 Ω/□~1.0×10 9 Ω/□.

本實施形態之影像顯示面板亦可為內建觸控感測機能之影像顯示面板。於圖9顯示內建觸控感測機能之影像顯示面板之一例。圖9之影像顯示面板11C具備有更包含觸控感測電極部35的影像顯示單元30B。影像顯示單元30B中,觸控感測電極部35係配置於第1透明基板31與第2透明基板33之間。觸控感測電極部35具有觸控感測器及觸控驅動之機能。影像顯示面板11C係所謂的內置型影像顯示面板,影像顯示單元30B係所謂的內置型影像顯示單元。惟,在影像顯示單元30B中,觸控感測電極部35亦可配置於較第1透明基板31更靠視辨側。即,影像顯示面板11C可為所謂的上置型影像顯示面板,影像顯示單元30B亦可為所謂的上置型影像顯示單元。The image display panel in this embodiment can also be an image display panel with a built-in touch sensing function. An example of an image display panel with a built-in touch sensing function is shown in FIG. 9 . The image display panel 11C of FIG. 9 is provided with an image display unit 30B further including a touch sensing electrode portion 35 . In the image display unit 30B, the touch sensing electrode portion 35 is disposed between the first transparent substrate 31 and the second transparent substrate 33 . The touch sensing electrode part 35 has functions of a touch sensor and a touch driver. Video display panel 11C is a so-called built-in video display panel, and video display unit 30B is a so-called built-in video display unit. However, in the image display unit 30B, the touch-sensing electrode portion 35 may also be disposed on the viewing side of the first transparent substrate 31 . That is, the image display panel 11C may be a so-called top-mounted image display panel, and the image display unit 30B may also be a so-called top-mounted image display unit.

觸控感測電極部35例如具有觸控感測器電極36及觸控驅動電極37。觸控感測器電極36意指觸控檢測用(接收)電極。觸控感測器電極36及觸控驅動電極37各自可獨立藉由各種圖案來形成。例如,影像顯示單元30B為平板狀時,觸控感測器電極36及觸控驅動電極37可分別獨立設於X軸方向及Y軸方向上,形成成該等以直角方式交錯的圖案。圖9中,觸控感測電極部35中,觸控感測器電極36係配置於較觸控驅動電極37更靠視辨側。惟,觸控驅動電極37亦可配置於較觸控感測器電極36更靠視辨側。觸控感測電極部35中,觸控感測器電極36及觸控驅動電極37亦可經一體化。The touch sensing electrode part 35 has, for example, a touch sensor electrode 36 and a touch driving electrode 37 . The touch sensor electrode 36 means a (receiving) electrode for touch detection. Each of the touch sensor electrodes 36 and the touch driving electrodes 37 can be independently formed by various patterns. For example, when the image display unit 30B is flat, the touch sensor electrodes 36 and the touch driving electrodes 37 can be independently arranged in the X-axis direction and the Y-axis direction respectively, forming these patterns that intersect at right angles. In FIG. 9 , in the touch sensing electrode portion 35 , the touch sensor electrode 36 is disposed on the viewing side of the touch driving electrode 37 . However, the touch driving electrodes 37 may also be disposed on the viewing side of the touch sensor electrodes 36 . In the touch sensing electrode portion 35 , the touch sensor electrodes 36 and the touch driving electrodes 37 may also be integrated.

圖9中,觸控感測電極部35係配置於影像形成層32與第1透明基板31之間(較影像形成層32更靠視辨側)。惟,觸控感測電極部35亦可配置於影像形成層32與第2透明基板33之間(較影像形成層32更靠照明系統側)。In FIG. 9 , the touch-sensing electrode portion 35 is disposed between the image forming layer 32 and the first transparent substrate 31 (more visible side than the image forming layer 32 ). However, the touch-sensing electrode portion 35 may also be disposed between the image forming layer 32 and the second transparent substrate 33 (closer to the lighting system side than the image forming layer 32 ).

在觸控感測電極部35中,觸控感測器電極36及觸控驅動電極37亦可不相接。例如,觸控感測器電極36亦可配置於影像形成層32與第1透明基板31之間,且觸控驅動電極37亦可配置於影像形成層32與第2透明基板33之間。In the touch sensing electrode portion 35 , the touch sensor electrodes 36 and the touch driving electrodes 37 may not be in contact with each other. For example, the touch sensor electrodes 36 can also be disposed between the image forming layer 32 and the first transparent substrate 31 , and the touch driving electrodes 37 can also be disposed between the image forming layer 32 and the second transparent substrate 33 .

觸控感測電極部35中之驅動電極(觸控驅動電極37、或觸控感測器電極36與觸控驅動電極37一體化而成的電極)可兼作控制影像形成層32的共通電極。The driving electrodes (the touch driving electrodes 37 , or the integrated electrodes of the touch sensor electrodes 36 and the touch driving electrodes 37 ) in the touch sensing electrode portion 35 can also serve as common electrodes for controlling the image forming layer 32 .

構成觸控感測電極部35之觸控感測器電極36(電容感測器)、觸控驅動電極37、或該等一體化而形成之電極係作為透明導電層發揮功能。該透明導電層之材料無特別限定,可舉例如金、銀、銅、鉑、鈀、鋁、鎳、鉻、鈦、鐵、鈷、錫、鎂、鎢等金屬及該等之合金等。透明導電層的材料亦可為銦、錫、鋅、鎵、銻、鋯、鎘等之金屬的氧化物。該氧化物具體上可舉氧化銦、氧化錫、氧化鈦、氧化鎘及該等之混合物等。透明導電層的材料亦可為碘化銅等金屬化合物。透明導電層之材料宜為含氧化錫之氧化銦(ITO)、含銻之氧化錫等,且ITO尤佳。透明導電層之材料為ITO時,透明導電層中之氧化銦的含有率宜為80~99重量%,且氧化錫的含有率宜為1~20重量%。The touch sensor electrodes 36 (capacitive sensors), the touch drive electrodes 37 , or the integrated electrodes forming the touch sensing electrode portion 35 function as a transparent conductive layer. The material of the transparent conductive layer is not particularly limited, and examples include metals such as gold, silver, copper, platinum, palladium, aluminum, nickel, chromium, titanium, iron, cobalt, tin, magnesium, tungsten, and alloys thereof. The material of the transparent conductive layer can also be oxides of metals such as indium, tin, zinc, gallium, antimony, zirconium, and cadmium. The oxide specifically includes indium oxide, tin oxide, titanium oxide, cadmium oxide, and mixtures thereof. The material of the transparent conductive layer can also be a metal compound such as copper iodide. The material of the transparent conductive layer is preferably indium oxide containing tin oxide (ITO), tin oxide containing antimony, etc., and ITO is particularly preferred. When the material of the transparent conductive layer is ITO, the content of indium oxide in the transparent conductive layer is preferably 80-99% by weight, and the content of tin oxide is preferably 1-20% by weight.

構成觸控感測電極部35之電極(觸控感測器電極36、觸控驅動電極37或該等一體化而形成之電極)可在第1透明基板31與第2透明基板33之間利用常規方法以透明電極圖案來形成。該透明電極圖案例如係與形成於透明基板之端部的繞線電連接。繞線例如係與控制器IC連接。透明電極圖案之形狀可因應用途採用梳狀、條紋狀、菱形狀等任意形狀。透明電極圖案之厚度例如為10nm~100nm。透明電極圖案之寬度例如為0.1mm~5mm。The electrodes (the touch sensor electrodes 36 , the touch drive electrodes 37 , or the integrated electrodes) constituting the touch sensing electrode portion 35 can be used between the first transparent substrate 31 and the second transparent substrate 33 A conventional method is to form a transparent electrode pattern. The transparent electrode pattern is, for example, electrically connected to the winding wire formed at the end of the transparent substrate. The wires are connected to, for example, a controller IC. The shape of the transparent electrode pattern can be any shape such as comb shape, stripe shape, rhombus shape, etc. according to the application. The thickness of the transparent electrode pattern is, for example, 10 nm˜100 nm. The width of the transparent electrode pattern is, for example, 0.1 mm˜5 mm.

[影像顯示裝置之實施形態] 本實施形態之影像顯示裝置例如具備有影像顯示面板11A及照明系統。此外,亦可使用圖8~9之影像顯示面板11B及11C來取代影像顯示面板11A。影像顯示裝置中,影像顯示面板11A例如係配置於較照明系統更靠視辨側。照明系統例如具有背光件或反射板,對影像顯示面板11A照射光。 [Embodiment of Image Display Device] The image display device of this embodiment includes, for example, an image display panel 11A and an illumination system. In addition, the image display panels 11B and 11C in FIGS. 8 to 9 may also be used instead of the image display panel 11A. In the image display device, for example, the image display panel 11A is disposed on the viewing side of the lighting system. The lighting system includes, for example, a backlight or a reflector, and irradiates light to the image display panel 11A.

影像顯示裝置可為有機EL顯示器,亦可為液晶顯示器。惟,影像顯示裝置不受該例所限。影像顯示裝置亦可為電致發光(EL)顯示器、電漿顯示器(PD)、場發射顯示器(FED:Field Emission Display)等。影像顯示裝置可用於家電用途、車載用途、公共資訊顯示器(PID)用途等,宜為車載用顯示器。The image display device may be an organic EL display or a liquid crystal display. However, the image display device is not limited to this example. The image display device may also be an electroluminescence (EL) display, a plasma display (PD), a field emission display (FED: Field Emission Display) and the like. The image display device can be used in home appliances, in-vehicles, public information displays (PIDs), etc., and is preferably an in-vehicle display.

實施例 以下藉由實施例更詳細說明本發明。本發明不受以下所示實施例所限。 Example The present invention will be described in detail below by means of examples. The present invention is not limited by the Examples shown below.

(偏光板之製作) 首先,將厚度80µm的聚乙烯醇薄膜在速度比不同之輥件間,於溫度30℃、濃度0.3%的碘溶液中染色1分鐘並延伸達3倍為止。接著,一邊將其浸漬於以濃度4%包含硼酸且以濃度10%包含碘化鉀之溫度60℃的水溶液中0.5分鐘,一邊進行延伸至總和延伸倍率達6倍為止。接著,將其浸漬於以濃度1.5%包含碘化鉀之溫度30℃的水溶液中10秒鐘洗淨後,在50℃下進行4分鐘乾燥,藉此獲得了厚度28µm之偏光件。將由具有內酯環結構之改質丙烯酸系聚合物構成的厚度30µm之透明保護薄膜,藉由聚乙烯醇系接著劑貼合於該偏光件之單面。並將三醋酸纖維素薄膜(Konica Minolta製,商品名「KC4UY」)上形成有硬塗層(HC)之厚度47µm的透明保護薄膜,藉由聚乙烯醇系接著劑貼合於偏光件之另一面。使其在設定成70℃之烘箱內加熱乾燥5分鐘,藉此製作出偏光板。 (Production of Polarizing Plate) First, the polyvinyl alcohol film with a thickness of 80 μm is dyed in an iodine solution with a temperature of 30°C and a concentration of 0.3% between rollers with different speed ratios for 1 minute and stretched until it reaches 3 times. Next, it was stretched until the total stretching ratio reached 6 times while dipping it in an aqueous solution at a temperature of 60° C. containing 4% boric acid and 10% potassium iodide for 0.5 minutes. Next, it was dipped in an aqueous solution containing potassium iodide at a concentration of 1.5% at a temperature of 30° C. for 10 seconds, and then dried at 50° C. for 4 minutes to obtain a polarizer with a thickness of 28 μm. A transparent protective film with a thickness of 30 µm made of a modified acrylic polymer with a lactone ring structure was bonded to one side of the polarizer with a polyvinyl alcohol-based adhesive. A cellulose triacetate film (manufactured by Konica Minolta, trade name "KC4UY") with a hard coat layer (HC) formed on a transparent protective film with a thickness of 47 µm was bonded to the other side of the polarizer with a polyvinyl alcohol-based adhesive. one side. This was heated and dried for 5 minutes in an oven set at 70° C., thereby producing a polarizing plate.

<(甲基)丙烯酸系聚合物之重量平均分子量> 以下實施例中,(甲基)丙烯酸系聚合物之重量平均分子量(Mw)係利用GPC(凝膠滲透層析法)來測定。針對(甲基)丙烯酸系聚合物之Mw/Mn亦同樣進行測定。 ・分析裝置:Tosoh(東曹)公司製,HLC-8120GPC ・管柱:Tosoh公司製,G7000H XL+GMH XL+GMH XL・管柱尺寸:各7.8mmφ×30cm 計90cm ・管柱溫度:40℃ ・流量:0.8mL/分鐘 ・注入量:100µL ・溶析液:四氫呋喃 ・檢測器:示差折射計(RI) ・標準試料:聚苯乙烯 <The weight-average molecular weight of the (meth)acrylic polymer> In the following examples, the weight-average molecular weight (Mw) of the (meth)acrylic polymer was measured by GPC (gel permeation chromatography). The Mw/Mn of the (meth)acrylic polymer was also measured in the same manner.・Analyzer: Tosoh Corporation, HLC-8120GPC ・Column: Tosoh Corporation, G7000H XL + GMH XL + GMH XL・Column size: 7.8mmφ×30cm each, 90cm in total ・Column temperature: 40°C・Flow rate: 0.8mL/min ・Injection volume: 100µL ・Eluent: THF ・Detector: Differential refractometer (RI) ・Standard sample: Polystyrene

(實施例1) <(甲基)丙烯酸系聚合物A1之調製> 首先,於具備攪拌葉片、溫度計、氮氣導入管及冷卻器之四口燒瓶中,饋入含有丙烯酸甲氧乙酯99重量份及丙烯酸4-羥丁酯1重量份之單體混合物。並且,相對於單體混合物100重量份,將作為聚合引發劑之2,2'-偶氮雙異丁腈(AIBN)0.1重量份與乙酸乙酯100重量份一同饋入。一邊緩慢地攪拌混合物一邊將氮氣導入燒瓶內進行氮取代。藉由將燒瓶內之液溫維持在55℃附近進行8小時聚合反應,調製出重量平均分子量(Mw)180萬、Mw/Mn=4.4之(甲基)丙烯酸系聚合物A1之溶液。 (Example 1) <Preparation of (meth)acrylic polymer A1> First, a monomer mixture containing 99 parts by weight of methoxyethyl acrylate and 1 part by weight of 4-hydroxybutyl acrylate was fed into a four-necked flask equipped with a stirring blade, a thermometer, a nitrogen gas introduction tube, and a cooler. And 0.1 weight part of 2,2'- azobisisobutyronitrile (AIBN) as a polymerization initiator was fed with 100 weight part of ethyl acetate with respect to 100 weight part of monomer mixtures. While slowly stirring the mixture, nitrogen gas was introduced into the flask to perform nitrogen substitution. A solution of (meth)acrylic polymer A1 with a weight average molecular weight (Mw) of 1,800,000 and Mw/Mn=4.4 was prepared by maintaining the liquid temperature in the flask at around 55° C. for 8 hours of polymerization reaction.

[(甲基)丙烯酸系黏著劑組成物之調製] 接著,相對於(甲基)丙烯酸系聚合物A1之溶液的固體成分100重量份,進一步摻混0.4重量份之異氰酸酯系交聯劑(Tosoh公司製之Coronate L,三羥甲丙烷甲苯二異氰酸酯)、0.1重量份之過氧化物系交聯劑(日本油脂公司製之NYPER BMT)、0.2重量份之矽烷耦合劑(信越化學工業公司製之KBM-403,γ-環氧丙氧基丙基甲氧基矽烷)及作為導電劑之5重量份的雙(三氟甲磺醯基)醯亞胺鋰(LiTFSI,Mitsubishi Materials Electronic Chemicals Co.,Ltd製),藉此調製出(甲基)丙烯酸系黏著劑組成物之溶液。 [Preparation of (meth)acrylic adhesive composition] Next, 0.4 parts by weight of an isocyanate-based crosslinking agent (Coronate L manufactured by Tosoh, trimethylolpropane toluene diisocyanate) was further blended with respect to 100 parts by weight of the solid content of the solution of the (meth)acrylic polymer A1. , 0.1 parts by weight of peroxide-based crosslinking agent (NYPER BMT manufactured by NOF Corporation), 0.2 parts by weight of silane coupling agent (KBM-403 manufactured by Shin-Etsu Chemical Industry Co., Ltd., γ-glycidoxypropyl methyl oxysilane) and 5 parts by weight of lithium bis(trifluoromethanesulfonyl)imide (LiTFSI, manufactured by Mitsubishi Materials Electronic Chemicals Co., Ltd) as a conductive agent to prepare a (meth)acrylic Solution of adhesive composition.

[光學積層體之製作] 接著,將(甲基)丙烯酸系黏著劑組成物之溶液以使乾燥後之黏著片厚度成為20µm之方式,塗佈於經聚矽氧系剝離劑處理過之聚對苯二甲酸乙二酯薄膜(剝離襯材:Mitsubishi Polyester Film公司製,MRF38)之單面。使所得之塗佈膜在155℃下乾燥1分鐘,藉此於剝離襯材之表面形成黏著片。接著,將形成於剝離襯材上之黏著片轉印至上述偏光板,而製作出實施例1之光學積層體(附黏著片之偏光板)。此外,黏著片係轉印至由改質丙烯酸系聚合物構成之透明保護薄膜側之偏光板表面。 [Production of optical laminates] Next, apply the solution of the (meth)acrylic adhesive composition on the polyethylene terephthalate film treated with the silicone release agent so that the thickness of the adhesive sheet after drying becomes 20 µm (Release liner: MRF38, manufactured by Mitsubishi Polyester Film Co., Ltd.) on one side. The obtained coating film was dried at 155° C. for 1 minute, thereby forming an adhesive sheet on the surface of the release liner. Next, the adhesive sheet formed on the release liner was transferred to the above-mentioned polarizing plate, and the optical laminate of Example 1 (polarizing plate with an adhesive sheet) was produced. In addition, the adhesive sheet was transferred to the surface of the polarizing plate on the side of the transparent protective film made of modified acrylic polymer.

(實施例2) 在(甲基)丙烯酸系黏著劑組成物之調製中,將雙(三氟甲磺醯基)醯亞胺鋰(LiTFSI,Mitsubishi Materials Electronic Chemicals Co.,Ltd製))之摻混量變更成10重量份,除此之外依與實施例1相同方法製作出實施例2之光學積層體。 (Example 2) In preparing the (meth)acrylic adhesive composition, the blending amount of lithium bis(trifluoromethanesulfonyl)imide (LiTFSI, manufactured by Mitsubishi Materials Electronic Chemicals Co., Ltd.)) was changed to 10 In addition to this, the optical laminate of Example 2 was produced in the same manner as in Example 1.

(實施例3) 在(甲基)丙烯酸系黏著劑組成物之調製中,使用1-乙-3-甲基咪唑鎓雙(氟磺醯基)醯亞胺(Elexcel AS-110,第一工業製藥公司製)5重量份作為導電劑,除此之外依與實施例1相同方法製作出實施例3之光學積層體。 (Example 3) In preparing the (meth)acrylic adhesive composition, 1-ethyl-3-methylimidazolium bis(fluorosulfonyl)imide (Elexcel AS-110, manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd.)5 was used The optical laminate of Example 3 was produced in the same manner as in Example 1 except that the weight part was used as a conductive agent.

(實施例4) 在(甲基)丙烯酸系黏著劑組成物之調製中,使用1-乙-3-甲基咪唑鎓雙(氟磺醯基)醯亞胺(Elexcel AS-110,第一工業製藥公司製)10重量份作為導電劑,除此之外依與實施例1相同方法製作出實施例4之光學積層體。 (Example 4) In preparing the (meth)acrylic adhesive composition, 1-ethyl-3-methylimidazolium bis(fluorosulfonyl)imide (Elexcel AS-110, manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd.) was used10 The optical laminate of Example 4 was produced in the same manner as in Example 1 except that the weight part was used as a conductive agent.

(實施例5) 使用含有丙烯酸丁酯69重量份、丙烯酸甲氧乙酯30重量份及丙烯酸4-羥丁酯1重量份之單體混合物調製出(甲基)丙烯酸系聚合物A2,來取代(甲基)丙烯酸系聚合物A1,除此之外依與實施例1相同方法製作出實施例5之光學積層體。(甲基)丙烯酸系聚合物A2為重量平均分子量(Mw)180萬,Mw/Mn=4.1。 (Example 5) Use a monomer mixture containing 69 parts by weight of butyl acrylate, 30 parts by weight of methoxyethyl acrylate and 1 part by weight of 4-hydroxybutyl acrylate to prepare (meth)acrylic polymer A2 to replace (meth)acrylic acid The optical laminate of Example 5 was produced in the same manner as in Example 1 except that it was polymer A1. The (meth)acrylic polymer A2 had a weight average molecular weight (Mw) of 1,800,000, and Mw/Mn=4.1.

(實施例6) 使用含有丙烯酸丁酯79重量份、丙烯酸甲氧基三乙二醇酯20重量份及丙烯酸4-羥丁酯1重量份之單體混合物調製出(甲基)丙烯酸系聚合物A3,來取代(甲基)丙烯酸系聚合物A1,除此之外依與實施例1相同方法製作出實施例6之光學積層體。(甲基)丙烯酸系聚合物A3為重量平均分子量(Mw)180萬,Mw/Mn=4.0。 (Example 6) Use a monomer mixture containing 79 parts by weight of butyl acrylate, 20 parts by weight of methoxytriethylene glycol acrylate and 1 part by weight of 4-hydroxybutyl acrylate to prepare (meth)acrylic polymer A3 to replace ( The optical laminate of Example 6 was produced in the same manner as in Example 1 except for the meth)acrylic polymer A1. The (meth)acrylic polymer A3 had a weight average molecular weight (Mw) of 1,800,000, and Mw/Mn=4.0.

(實施例7) 使用含有丙烯酸甲氧基乙酯79重量份、丙烯酸甲氧基三乙二醇酯20重量份及丙烯酸4-羥丁酯1重量份之單體混合物調製出(甲基)丙烯酸系聚合物A4,來取代(甲基)丙烯酸系聚合物A1,除此之外依與實施例1相同方法製作出實施例7之光學積層體。(甲基)丙烯酸系聚合物A4為重量平均分子量(Mw)180萬,Mw/Mn=4.3。 (Example 7) (meth)acrylic polymer A4 was prepared using a monomer mixture containing 79 parts by weight of methoxyethyl acrylate, 20 parts by weight of methoxytriethylene glycol acrylate and 1 part by weight of 4-hydroxybutyl acrylate. The optical laminate of Example 7 was produced in the same manner as in Example 1 except that the (meth)acrylic polymer A1 was replaced. The (meth)acrylic polymer A4 had a weight average molecular weight (Mw) of 1,800,000, and Mw/Mn=4.3.

(比較例1) [(甲基)丙烯酸系聚合物A5之調製] 首先,於具備攪拌葉片、溫度計、氮氣導入管及冷卻器之四口燒瓶中,饋入含有丙烯酸丁酯77重量份、丙烯酸苄酯18重量份、丙烯酸4.8重量份及丙烯酸4-羥丁酯0.2重量份之單體混合物。並且,相對於單體混合物100重量份,將作為聚合引發劑之2,2'-偶氮雙異丁腈(AIBN)0.1重量份與乙酸乙酯100重量份一同饋入。一邊緩慢地攪拌混合物一邊將氮氣導入燒瓶內進行氮取代。藉由將燒瓶內之液溫維持在55℃附近進行8小時聚合反應,調製出重量平均分子量(Mw)200萬、Mw/Mn=4.0之(甲基)丙烯酸系聚合物A5之溶液。 (comparative example 1) [Preparation of (meth)acrylic polymer A5] First, in a four-necked flask equipped with a stirring blade, a thermometer, a nitrogen inlet pipe and a cooler, feed 77 parts by weight of butyl acrylate, 18 parts by weight of benzyl acrylate, 4.8 parts by weight of acrylic acid and 0.2 parts by weight of 4-hydroxybutyl acrylate. A monomer mixture in parts by weight. And 0.1 weight part of 2,2'- azobisisobutyronitrile (AIBN) as a polymerization initiator was fed with 100 weight part of ethyl acetate with respect to 100 weight part of monomer mixtures. While slowly stirring the mixture, nitrogen gas was introduced into the flask to perform nitrogen substitution. A solution of (meth)acrylic polymer A5 with a weight average molecular weight (Mw) of 2,000,000 and Mw/Mn=4.0 was prepared by maintaining the liquid temperature in the flask at around 55° C. for 8 hours of polymerization reaction.

[(甲基)丙烯酸系黏著劑組成物之調製] 接著,相對於(甲基)丙烯酸系聚合物A5之溶液的固體成分100重量份,進一步摻混0.45重量份之異氰酸酯系交聯劑(Tosoh公司製之Coronate L,三羥甲丙烷甲苯二異氰酸酯)、0.1重量份之過氧化物系交聯劑(日本油脂公司製之NYPER BMT)、0.2重量份之矽烷耦合劑(信越化學工業公司製之KBM-403,γ-環氧丙氧基丙基甲氧基矽烷)及作為導電劑之10重量份的雙(三氟甲磺醯基)醯亞胺鋰(LiTFSI,Mitsubishi Materials Electronic Chemicals Co.,Ltd製),藉此調製出(甲基)丙烯酸系黏著劑組成物之溶液。 [Preparation of (meth)acrylic adhesive composition] Next, 0.45 parts by weight of an isocyanate-based crosslinking agent (Coronate L manufactured by Tosoh, trimethylolpropane toluene diisocyanate) was further blended with respect to 100 parts by weight of the solid content of the solution of (meth)acrylic polymer A5. , 0.1 parts by weight of peroxide-based crosslinking agent (NYPER BMT manufactured by NOF Corporation), 0.2 parts by weight of silane coupling agent (KBM-403 manufactured by Shin-Etsu Chemical Industry Co., Ltd., γ-glycidoxypropyl methyl oxysilane) and 10 parts by weight of lithium bis(trifluoromethanesulfonyl)imide (LiTFSI, manufactured by Mitsubishi Materials Electronic Chemicals Co., Ltd.) as a conductive agent to prepare a (meth)acrylic acid Solution of adhesive composition.

[光學積層體之製作] 接著,將(甲基)丙烯酸系黏著劑組成物之溶液以使乾燥後之黏著片厚度成為20µm之方式,塗佈於經聚矽氧系剝離劑處理過之聚對苯二甲酸乙二酯薄膜(剝離襯材:Mitsubishi Polyester Film公司製,MRF38)之單面。使所得之塗佈膜在155℃下乾燥1分鐘,藉此於剝離襯材之表面形成黏著片。接著,將形成於剝離襯材上之黏著片轉印至上述偏光板,製作出比較例1之光學積層體。此外,黏著片係轉印至由改質丙烯酸系聚合物構成之透明保護薄膜側之偏光板表面。 [Production of optical laminates] Next, apply the solution of the (meth)acrylic adhesive composition on the polyethylene terephthalate film treated with the silicone release agent so that the thickness of the adhesive sheet after drying becomes 20 µm (Release liner: MRF38, manufactured by Mitsubishi Polyester Film Co., Ltd.) on one side. The obtained coating film was dried at 155° C. for 1 minute, thereby forming an adhesive sheet on the surface of the release liner. Next, the adhesive sheet formed on the release liner was transferred to the above-mentioned polarizing plate, and an optical laminate of Comparative Example 1 was produced. In addition, the adhesive sheet was transferred to the surface of the polarizing plate on the side of the transparent protective film made of modified acrylic polymer.

(比較例2) 除了在(甲基)丙烯酸系黏著劑組成物之調製中未摻混導電劑外,依與比較例1相同方法製作出比較例2之光學積層體。 (comparative example 2) The optical laminate of Comparative Example 2 was produced in the same manner as in Comparative Example 1 except that no conductive agent was mixed in the preparation of the (meth)acrylic adhesive composition.

<相對介電常數之測定> 製作出之(甲基)丙烯酸系聚合物在頻率100kHz下之相對介電常數之測定係藉由上述方法實施。 <Measurement of Relative Permittivity> The measurement of the relative permittivity of the produced (meth)acrylic polymer at a frequency of 100 kHz was carried out by the above-mentioned method.

<表面電阻值之測定> 針對製作出之光學積層體剝除剝離襯材,測定黏著片之表面電阻值。表面電阻值之測定係使用Mitsubishi Chemical Analytech公司製MCP-HT450,在施加電壓250V、施加時間10秒之條件下進行。黏著片之表面電阻值的測定係針對剛製作後之光學積層體與加濕處理後之光學積層體進行。加濕處理係藉由上述試驗方法3進行。 <Measurement of Surface Resistance> The release liner was peeled off from the prepared optical laminate, and the surface resistance value of the adhesive sheet was measured. The measurement of the surface resistance value was carried out using MCP-HT450 manufactured by Mitsubishi Chemical Analytech under conditions of an applied voltage of 250 V and an applied time of 10 seconds. The measurement of the surface resistance value of the adhesive sheet was carried out on the optical layered body immediately after production and the optical layered body after humidification treatment. The humidification treatment was carried out by the above-mentioned test method 3.

<ESD試驗> 針對製作出之光學積層體,利用以下方法進行靜電放電(ESD)試驗。首先,從光學積層體剝除剝離襯材,並貼合於內置型液晶單元之視辨側表面,製作出內建觸控感測機能之液晶面板。接著,使用施加電壓經調節成10kV之靜電放電(ESD)槍,對液晶面板之視辨側(偏光板側)賦予靜電。賦予靜電後,測定泛白部分消失為止的時間,按下述基準進行評估。此外,ESD試驗係針對剛製作後之光學積層體與加濕處理後之光學積層體進行。加濕處理係藉由於上針對表面電阻值之測定所述之方法進行。 (評估基準) A:未視辨到泛白。 B:泛白在1秒內消失。 C:泛白在大於1秒且在10秒內消失。 D:泛白在超過10秒後消失。 <ESD test> Electrostatic discharge (ESD) tests were performed on the produced optical laminates by the following method. First, the release liner is peeled off from the optical laminate, and attached to the viewing side surface of the built-in liquid crystal unit to produce a liquid crystal panel with built-in touch sensing function. Next, static electricity was applied to the viewing side (polarizer side) of the liquid crystal panel using an electrostatic discharge (ESD) gun whose applied voltage was adjusted to 10 kV. After static electricity was applied, the time until the whitish part disappeared was measured, and the following criteria were used for evaluation. In addition, the ESD test is carried out on the optical layered body just after production and the optical layered body after humidification treatment. The humidification treatment was carried out by the method described above for the measurement of the surface resistance value. (Assessment basis) A: Whitening was not recognized. B: Whitening disappeared within 1 second. C: The whitening disappeared within more than 1 second and within 10 seconds. D: Whitening disappeared after more than 10 seconds.

<霧度測定> 藉由上述方法,製作出具備光學積層體之評估用試樣,測定評估用試樣之初始霧度H 0與評估用試樣配置在105℃之加熱環境下250小時後之霧度H。詳細而言,評估用試樣係利用以下方法製作。首先,將光學積層體裁切成長50mm×寬50mm之尺寸,並剝離剝離襯材。透過黏著片貼合光學積層體與無鹼玻璃。接著,於偏光板之HC層上配置由丙烯酸系透明黏著劑構成之厚度250µm的透明黏著片(日東電工公司製LUCIACS CS98210U)。透過透明黏著片將光學積層體與另一無鹼玻璃貼合,藉此製作出評估用試樣。此外,霧度之測定係使用霧度計(村上色彩技術研究所製之HM-150N)。 <Measurement of haze> An evaluation sample with an optical laminate was produced by the above method, and the initial haze H0 of the evaluation sample was measured and the evaluation sample was placed in a heating environment at 105°C for 250 hours. Haze H. Specifically, samples for evaluation were produced by the following method. First, the optical layered body was cut into a size of 50 mm in length and 50 mm in width, and the release liner was peeled off. Bond the optical laminate and the alkali-free glass through the adhesive sheet. Next, a 250-µm-thick transparent adhesive sheet (LUCIACS CS98210U manufactured by Nitto Denko Co., Ltd.) made of an acrylic transparent adhesive was placed on the HC layer of the polarizing plate. The optical laminate was bonded to another non-alkali glass through a transparent adhesive sheet to prepare a sample for evaluation. In addition, the haze was measured using a haze meter (HM-150N manufactured by Murakami Color Technology Laboratory).

<色調評估> 藉由以下方法,製作出具備光學積層體之評估用試樣,進行色調之評估。首先,將光學積層體裁切成長200mm×寬50mm之尺寸,並剝離剝離襯材。透過黏著片貼合光學積層體與無鹼玻璃。接著,於偏光板之HC層上配置由丙烯酸系透明黏著劑構成之厚度250µm的透明黏著片(日東電工公司製LUCIACS CS98210U)。透過透明黏著片將光學積層體與另一無鹼玻璃貼合,藉此製作出評估用試樣。接著,準備配置有追加之偏光板的光源(CIE標準光源D65),配置成與相較於偏光板位在靠黏著片側之評估用試樣表面相對向。此時,追加之偏光板係在光源與評估用試樣之間,配置成對光學積層體中之偏光板的吸收軸形成正交偏光之關係。接著,於暗房內使來自光源之光透過追加之偏光板入射評估用試樣之表面。針對透射評估用試樣之透射光,以肉眼確認其色調,並以具備不含導電劑之比較例2的光學積層體之評估用試樣的結果為基準,按下述指標進行評估。此外,色調之評估亦針對配置在105℃之加熱環境下250小時後之評估用試樣進行。關於具備比較例2的光學積層體之評估用試樣,在配置於加熱環境下之前後,未於上述透射光見到不需要的著色。 (評估基準) A:透射光顯示出與透射具備比較例2的光學積層體之評估用試樣之透射光相同程度的色調。 C:透射光顯示出較透射具備比較例2的光學積層體之評估用試樣之透射光更深的色調(綠色)。 <Tint evaluation> An evaluation sample having an optical layered body was produced by the following method, and the color tone was evaluated. First, the optical laminate was cut into a size of 200 mm long x 50 mm wide, and the release liner was peeled off. Bond the optical laminate and the alkali-free glass through the adhesive sheet. Next, a 250-µm-thick transparent adhesive sheet (LUCIACS CS98210U manufactured by Nitto Denko Co., Ltd.) made of an acrylic transparent adhesive was placed on the HC layer of the polarizing plate. The optical laminate was bonded to another non-alkali glass through a transparent adhesive sheet to prepare a sample for evaluation. Next, a light source (CIE standard light source D65) in which an additional polarizing plate was arranged was prepared, and it was arranged to face the surface of the evaluation sample on the side closer to the adhesive sheet than the polarizing plate. In this case, the additional polarizing plate was arranged between the light source and the evaluation sample so as to form a cross-polarized relationship with respect to the absorption axis of the polarizing plate in the optical layered body. Next, the light from the light source was made incident on the surface of the sample for evaluation through the additional polarizing plate in the dark room. The color tone of the transmitted light of the transmission evaluation sample was confirmed with the naked eye, and the evaluation was performed based on the results of the evaluation sample having the optical laminate of Comparative Example 2 that did not contain a conductive agent, according to the following indicators. In addition, the evaluation of color tone was also performed about the evaluation sample arrange|positioned in the heating environment of 105 degreeC after 250 hours. Regarding the evaluation sample including the optical layered body of Comparative Example 2, unnecessary coloring was not seen in the above-mentioned transmitted light before and after being placed in a heating environment. (Assessment basis) A: The transmitted light exhibited the same level of color tone as the transmitted light transmitted through the evaluation sample including the optical layered body of Comparative Example 2. C: The transmitted light exhibited a deeper color tone (green) than the transmitted light transmitted through the evaluation sample having the optical layered body of Comparative Example 2.

[表1] [Table 1]

表1中之簡稱如下。 BA:丙烯酸正丁酯 MEA:丙烯酸甲氧乙酯 MTGA:丙烯酸甲氧基三乙二醇酯 BzA:丙烯酸苄酯 AA:丙烯酸 HBA:丙烯酸4-羥丁酯 AIBN:偶氮系聚合引發劑,2,2'-偶氮雙異丁腈(KISHIDA化學公司製) The abbreviations in Table 1 are as follows. BA: n-butyl acrylate MEA: methoxyethyl acrylate MTGA: Methoxytriethylene glycol acrylate BzA: benzyl acrylate AA: Acrylic HBA: 4-Hydroxybutyl Acrylate AIBN: Azo-based polymerization initiator, 2,2'-azobisisobutyronitrile (manufactured by KISHIDA Chemical Co., Ltd.)

[表2] [Table 2]

表2中之簡稱如下。 LiTFSI:鋰雙(三氟甲磺醯基)醯亞胺 AS-110:1-乙-3-甲基咪唑鎓雙(氟磺醯基)醯亞胺 The abbreviations in Table 2 are as follows. LiTFSI: lithium bis(trifluoromethanesulfonyl)imide AS-110: 1-Eth-3-methylimidazolium bis(fluorosulfonyl)imide

由表2可知,實施例之光學積層體包含表面電阻值夠低的黏著片,且即使在歷經高溫環境之情況下,色調評估之結果仍良好。由表2之結果可推測,實施例之光學積層體即使在歷經高溫環境之情況下,仍適於抑制來自影像顯示裝置之光產生不需要之著色。It can be seen from Table 2 that the optical laminates of the examples include an adhesive sheet with a sufficiently low surface resistance, and even after being exposed to a high temperature environment, the results of color tone evaluation are still good. From the results in Table 2, it can be inferred that the optical laminates of the examples are suitable for suppressing unwanted coloring of light from an image display device even after being subjected to a high-temperature environment.

相對於此,比較例1的光學積層體在歷經高溫環境之情況下,在色調評估中透射光產生了綠色著色。比較例2的光學積層體中,黏著片之表面電阻值不足,ESD試驗之結果較實施例差。On the other hand, when the optical layered body of Comparative Example 1 passed through a high-temperature environment, the transmitted light was colored green in color tone evaluation. In the optical laminate of Comparative Example 2, the surface resistance value of the adhesive sheet was insufficient, and the result of the ESD test was inferior to that of Examples.

產業上之可利用性 本發明光學積層體可適合利用於EL顯示器、液晶顯示器等影像顯示裝置。 Industrial availability The optical layered body of the present invention can be suitably utilized for image display devices such as EL displays and liquid crystal displays.

1:黏著片 2:偏光板 3:剝離襯材 4:層間黏著劑4 5:相位差薄膜 6:保護薄膜 10A,10B,10C,10D:光學積層體 11A,11B,11C:影像顯示面板 15:評估用試樣 20,20A,20B:無鹼玻璃 21:透明黏著片 22:追加之偏光板 23:光源 30A,30B:影像顯示單元 31:第1透明基板 32:影像形成層 33:第2透明基板 35:觸控感測電極部 36:觸控感測器電極 37:觸控驅動電極 40:導電層 1: Adhesive sheet 2: polarizer 3: Peel off the lining 4: interlayer adhesive 4 5: Retardation film 6: Protective film 10A, 10B, 10C, 10D: optical laminates 11A, 11B, 11C: video display panel 15: Samples for evaluation 20, 20A, 20B: Alkali-free glass 21: Transparent adhesive sheet 22: Additional polarizer 23: light source 30A, 30B: image display unit 31: The first transparent substrate 32: Image cambium 33: Second transparent substrate 35: Touch sensing electrode part 36: Touch sensor electrode 37: Touch driving electrode 40: Conductive layer

圖1係示意顯示本發明光學積層體之一例的截面圖。 圖2係示意顯示包含光學積層體之評估用試樣的截面圖。 圖3係用以說明使用評估用試樣之評估方法的圖。 圖4係示意顯示本發明光學積層體之一例的截面圖。 圖5係示意顯示本發明光學積層體之一例的截面圖。 圖6係示意顯示本發明光學積層體之一例的截面圖。 圖7係示意顯示本發明影像顯示面板之一例的截面圖。 圖8係示意顯示本發明影像顯示面板之一例的截面圖。 圖9係示意顯示本發明影像顯示面板之一例的截面圖。 Fig. 1 is a cross-sectional view schematically showing an example of the optical layered body of the present invention. Fig. 2 is a cross-sectional view schematically showing an evaluation sample including an optical layered body. Fig. 3 is a diagram for explaining an evaluation method using an evaluation sample. Fig. 4 is a cross-sectional view schematically showing an example of the optical layered body of the present invention. Fig. 5 is a cross-sectional view schematically showing an example of the optical layered body of the present invention. Fig. 6 is a cross-sectional view schematically showing an example of the optical layered body of the present invention. FIG. 7 is a cross-sectional view schematically showing an example of an image display panel of the present invention. FIG. 8 is a cross-sectional view schematically showing an example of the image display panel of the present invention. FIG. 9 is a cross-sectional view schematically showing an example of an image display panel of the present invention.

1:黏著片 1: Adhesive sheet

2:偏光板 2: polarizer

10A:光學積層體 10A: Optical laminate

Claims (18)

一種光學積層體,包含黏著片與偏光板,且該黏著片係由含聚合物(A)之黏著劑組成物形成; 前述聚合物(A)在頻率100kHz下之相對介電常數為5.0以上; 前述黏著片之表面電阻值為1.0×10 10Ω/□以下; 該光學積層體藉由下述試驗方法測定之霧度為1.0%以下; 試驗方法:以2片無鹼玻璃包夾前述光學積層體,製作評估用試樣;將前述評估用試樣在105℃下加熱250小時後,測定該評估用試樣之霧度。 An optical laminate comprising an adhesive sheet and a polarizing plate, and the adhesive sheet is formed of an adhesive composition containing a polymer (A); the relative dielectric constant of the aforementioned polymer (A) at a frequency of 100 kHz is 5.0 or more; The surface resistance value of the above-mentioned adhesive sheet is 1.0×10 10 Ω/□ or less; the haze of the optical laminate measured by the following test method is 1.0% or less; Test method: The above-mentioned optical laminate is sandwiched by two pieces of non-alkali glass body to prepare a sample for evaluation; after heating the sample for evaluation at 105° C. for 250 hours, measure the haze of the sample for evaluation. 如請求項1之光學積層體,其中前述表面電阻值為2.0×10 8Ω/□以下。 The optical laminate according to claim 1, wherein the surface resistance value is 2.0×10 8 Ω/□ or less. 如請求項1或2之光學積層體,其中前述相對介電常數為7.5以上。The optical laminate according to claim 1 or 2, wherein the relative permittivity is 7.5 or more. 如請求項1至3中任一項之光學積層體,其中前述黏著劑組成物包含導電劑。The optical laminate according to any one of claims 1 to 3, wherein the adhesive composition contains a conductive agent. 如請求項4之光學積層體,其中前述黏著劑組成物中,相對於前述聚合物(A)100重量份,前述導電劑之摻混量為3.0重量份以上。The optical laminate according to claim 4, wherein in the adhesive composition, the blending amount of the conductive agent is 3.0 parts by weight or more with respect to 100 parts by weight of the polymer (A). 如請求項4或5之光學積層體,其中前述黏著劑組成物中,相對於前述聚合物(A)100重量份,前述導電劑之摻混量為10重量份以下。The optical laminate according to claim 4 or 5, wherein in the adhesive composition, the blending amount of the conductive agent is 10 parts by weight or less with respect to 100 parts by weight of the polymer (A). 如請求項4至6中任一項之光學積層體,其中前述導電劑為離子性化合物。The optical laminate according to any one of claims 4 to 6, wherein the conductive agent is an ionic compound. 如請求項1至7中任一項之光學積層體,其中前述黏著劑組成物包含過氧化物系交聯劑。The optical laminate according to any one of claims 1 to 7, wherein the adhesive composition contains a peroxide-based crosslinking agent. 如請求項1至8中任一項之光學積層體,其中前述聚合物(A)具有源自含烷氧基單體之結構單元。The optical laminate according to any one of claims 1 to 8, wherein the aforementioned polymer (A) has a structural unit derived from an alkoxy group-containing monomer. 如請求項9之光學積層體,其中前述含烷氧基單體係以下述式(1)表示: [化學式1] 前述式(1)中,R 1為氫原子或甲基,R 2為烷基,n為1~30之整數。 The optical laminate according to Claim 9, wherein the aforementioned alkoxy-containing monomer system is represented by the following formula (1): [Chemical Formula 1] In the aforementioned formula (1), R 1 is a hydrogen atom or a methyl group, R 2 is an alkyl group, and n is an integer of 1 to 30. 如請求項9或10之光學積層體,其中前述聚合物(A)中源自前述含烷氧基單體之前述結構單元的含有率為15重量%以上。The optical laminate according to claim 9 or 10, wherein the content of the structural unit derived from the alkoxy-containing monomer in the polymer (A) is 15% by weight or more. 如請求項1至11中任一項之光學積層體,其中前述聚合物(A)中源自含羧基單體之結構單元的含有率小於0.1重量%。The optical laminate according to any one of claims 1 to 11, wherein the content of the structural unit derived from a carboxyl group-containing monomer in the polymer (A) is less than 0.1% by weight. 如請求項1至12中任一項之光學積層體,其中前述聚合物(A)之玻璃轉移溫度為-50℃以下。The optical laminate according to any one of claims 1 to 12, wherein the glass transition temperature of the polymer (A) is -50°C or lower. 如請求項1至13中任一項之光學積層體,其中前述聚合物(A)之重量平均分子量Mw相對於數量平均分子量Mn的比(Mw/Mn)為20以下。The optical laminate according to any one of claims 1 to 13, wherein the ratio (Mw/Mn) of the weight average molecular weight Mw of the polymer (A) to the number average molecular weight Mn is 20 or less. 如請求項1至14中任一項之光學積層體,其中前述偏光板之單體透射率為40%~43%。The optical laminate according to any one of claims 1 to 14, wherein the single transmittance of the polarizing plate is 40% to 43%. 如請求項1至15中任一項之光學積層體,其藉由下述試驗方法測定之透射光之L *a *b *表色系統中的a *值及b *值滿足下述關係式(I)及(II): 試驗方法:以2片無鹼玻璃包夾前述光學積層體,製作評估用試樣;將前述評估用試樣在105℃下加熱250小時;準備配置有追加之偏光板的光源(CIE標準光源D65),該追加之偏光板係對前述光學積層體中之前述偏光板的吸收軸形成正交偏光之關係;使來自前述光源之光透過前述追加之偏光板入射相較於前述偏光板位在靠前述黏著片側之前述評估用試樣表面;測定透射前述評估用試樣之透射光之L *a *b *表色系統中的a *值及b *值; -0.3≦a *≦0.7      (I) -1.5≦b *≦0.5      (II)。 The optical laminate according to any one of Claims 1 to 15, wherein the a * value and b * value in the L * a * b * colorimetric system of the transmitted light measured by the following test method satisfy the following relationship (I) and (II): Test method: The above-mentioned optical laminate is sandwiched by two pieces of non-alkali glass to make an evaluation sample; the above-mentioned evaluation sample is heated at 105°C for 250 hours; an additional polarized light is prepared and placed The light source of the plate (CIE standard light source D65), the additional polarizing plate forms a relationship of orthogonal polarization to the absorption axis of the aforementioned polarizing plate in the aforementioned optical laminate; the light from the aforementioned light source passes through the aforementioned additional polarizing plate incident phase The surface of the aforementioned evaluation sample on the side closer to the aforementioned adhesive sheet than the aforementioned polarizing plate; measure the a * value and b * value in the L * a * b * colorimetric system of the transmitted light transmitted through the aforementioned evaluation sample; - 0.3≦a * ≦0.7 (I) -1.5≦b * ≦0.5 (II). 一種影像顯示面板,具備如請求項1至16中任一項之光學積層體。An image display panel comprising the optical laminate according to any one of Claims 1 to 16. 一種影像顯示裝置,具備如請求項17之影像顯示面板。An image display device, comprising the image display panel according to claim 17.
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