TW202218878A - Polarizing plate with attached hard coat layer and image display device including polarizing plate with attached hard coat layer - Google Patents
Polarizing plate with attached hard coat layer and image display device including polarizing plate with attached hard coat layer Download PDFInfo
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B23/00—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose
- B32B23/04—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered 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
- B32B7/02—Physical, chemical or physicochemical properties
- B32B7/022—Mechanical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered 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
- B32B7/02—Physical, chemical or physicochemical properties
- B32B7/023—Optical properties
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/02—Details
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/8793—Arrangements for polarized light emission
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Nonlinear Science (AREA)
- Mechanical Engineering (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Theoretical Computer Science (AREA)
- Polarising Elements (AREA)
Abstract
Description
本發明涉及附硬塗層之偏光板及包含該附硬塗層之偏光板之影像顯示裝置。The present invention relates to a polarizing plate with a hard coating and an image display device including the polarizing plate with a hard coating.
手機、筆記型個人電腦等影像顯示裝置中，為了實現影像顯示及/或提高該影像顯示性能而廣泛使用偏光板。當影像顯示裝置因來自外部之接觸而於其表面發生損傷時，會有顯示影像之視辨性降低之情形。因此，為了保護影像顯示裝置之表面，有使用於表面側(視辨側)形成有硬塗層之偏光板(附硬塗層之偏光板)之情形。近年來，有期望將光學薄膜加工成矩形以外之形狀(異形加工：例如形成缺口及/或貫通孔)之情形。但以附硬塗層之偏光板的異形加工部來說，卻有容易於硬塗層發生破損及/或裂痕之問題。 先前技術文獻 專利文獻 In image display devices such as mobile phones and notebook personal computers, polarizing plates are widely used in order to realize image display and/or improve the image display performance. When the surface of the image display device is damaged due to external contact, the visibility of the displayed image may decrease. Therefore, in order to protect the surface of an image display device, a polarizing plate (polarizing plate with a hard coating layer) having a hard coat layer formed on the surface side (viewing side) is sometimes used. In recent years, it has been desired to process an optical film into a shape other than a rectangle (different shape processing: for example, forming a notch and/or a through hole). However, for the deformed part of the polarizing plate with the hard coating, there is a problem that the hard coating is easily damaged and/or cracked. prior art literature Patent Literature
專利文獻1：日本專利特開2012-234163號公報Patent Document 1: Japanese Patent Laid-Open No. 2012-234163
發明欲解決之課題 本發明是為了解決上述以往課題而成者，其主要目的在於提供一種已顯著抑制住異形加工部中硬塗層之破損及裂痕之附硬塗層之光學薄膜。 The problem to be solved by the invention The present invention was made in order to solve the above-mentioned conventional problems, and its main object is to provide an optical film with a hard coat layer in which breakage and cracks of the hard coat layer in a deformed part are remarkably suppressed.
用以解決課題之手段 本發明實施形態之附硬塗層之偏光板依序具有偏光件、保護層、厚度為0.1µm~8µm之中間層及硬塗層，且具有矩形以外之異形；並且該中間層每1µm厚度之剪切破壞強度為10MPa以上。 在一實施形態中，上述中間層係包含上述硬塗層之成分與上述保護層之成分的相溶區域。 在一實施形態中，上述中間層之厚度為0.3µm~5µm。 在一實施形態中，上述中間層每1µm厚度之剪切破壞強度為14MPa以上。 在一實施形態中，上述硬塗層之厚度為5µm以下。 在一實施形態中，上述保護層係以三醋酸纖維素薄膜構成。 在一實施形態中，上述異形係選自於由下述所構成之群組：貫通孔、V字缺口、U字缺口、俯視時呈近似船形之形狀的凹部、俯視時呈矩形之凹部、俯視時呈近似浴缸形狀之R形狀的凹部及該等之組合。 根據本發明另一面向提供一種影像顯示裝置。該影像顯示裝置於視辨側包含上述附硬塗層之偏光板。 means of solving problems The polarizing plate with a hard coat layer according to the embodiment of the present invention has a polarizer, a protective layer, an intermediate layer with a thickness of 0.1 μm~8 μm, and a hard coat layer in sequence, and has a special shape other than a rectangle; and the thickness of the intermediate layer per 1 μm is The shear fracture strength is 10 MPa or more. In one Embodiment, the said intermediate layer contains the compatible region of the component of the said hard-coat layer, and the component of the said protective layer. In one embodiment, the thickness of the above-mentioned intermediate layer is 0.3µm˜5µm. In one embodiment, the shear failure strength per 1 µm of thickness of the intermediate layer is 14 MPa or more. In one embodiment, the thickness of the hard coat layer is 5 µm or less. In one embodiment, the protective layer is formed of a triacetate cellulose film. In one embodiment, the above-mentioned special-shaped system is selected from the group consisting of: through-holes, V-shaped notch, U-shaped notch, a concave portion with a shape similar to a boat shape in plan view, a rectangular concave portion in plan view, and a plan view. It is an R-shaped recess and a combination of these. According to another aspect of the present invention, an image display device is provided. The image display device includes the above-mentioned polarizing plate with a hard coating on the viewing side.
發明效果 根據本發明實施形態，在具有矩形以外之異形(異形加工部)之附硬塗層之偏光板中，於保護層與硬塗層之間形成代表上為相溶區域之中間層，並將該中間層之厚度及每單位厚度之剪切破壞強度最佳化，藉此可實現一種已顯著抑制住異形加工部中硬塗層之破損及裂痕之附硬塗層之偏光板。 Invention effect According to an embodiment of the present invention, in a polarizing plate with a hard coat layer having a deformed shape other than a rectangular shape (different-shaped processed portion), an intermediate layer representing a compatible region is formed between the protective layer and the hard coat layer, and the The thickness of the intermediate layer and the shear failure strength per unit thickness are optimized, thereby realizing a hard-coating polarizing plate that has remarkably suppressed breakage and cracking of the hard-coating layer in the deformed portion.
以下參照圖式針對本發明具體實施形態進行說明，惟本發明不受該等實施形態限定。此外，為了便於觀看而示意顯示圖式，並且圖式中之長度、寬度、厚度等比率、以及角度等與實際不同。The following describes specific embodiments of the present invention with reference to the drawings, but the present invention is not limited to these embodiments. In addition, the drawings are schematically shown for convenience of viewing, and ratios such as length, width, thickness, etc., and angles in the drawings are different from actual ones.
本說明書中，「硬塗層」可作為具有表面保護功能之硬質表面處理層之總稱使用。因此，硬塗層不僅包含一般的硬塗層，還可包含抗反射層、抗黏層、防眩層、抗黏結層。In this specification, "hard coat layer" can be used as a general term for hard surface treatment layers with surface protection function. Therefore, the hard coat layer includes not only a general hard coat layer, but also an anti-reflection layer, an anti-adhesion layer, an anti-glare layer, and an anti-adhesion layer.
A.附硬塗層之偏光板之概略
圖1係本發明一實施形態之附硬塗層之偏光板的概略截面圖。圖式例之附硬塗層之偏光板100依序具有偏光件10、保護層20、中間層30及硬塗層40。中間層30代表上係包含硬塗層40之成分與保護層20之成分的相溶區域。本發明實施形態中，中間層之厚度為0.1µm~8µm，且中間層每1µm厚度之剪切破壞強度為10MPa以上。根據本發明實施形態，在具有矩形以外之異形(異形加工部)之附硬塗層之偏光板中，於保護層與硬塗層之間形成中間層，並令中間層之厚度及每單位厚度之剪切破壞強度為如上述之範圍，藉此可顯著抑制異形加工部中硬塗層之破損及裂痕。剪切破壞強度係切削(破壞)單一薄膜或積層體之各層時所需之力，例如可藉由SAICAS(Surface And Interfacial Cutting Analysis System；表面界面物性解析儀)求算。參照圖2來說明求算剪切破壞強度之具體程序。圖2中係顯示由上而下依序具有硬塗層、中間層及保護層之積層體。使用精密斜向切削裝置(例如DAIPLA WINTES CO., LTD.製，「SAICAS DN-20型」)將該積層體斜向切削時之剪切強度即成為剪切破壞強度。斜向切削可藉由使切刀進行雙軸運動(水平方向及垂直方向之運動)來進行。剪切破壞強度T(MPa)可由下述式求算。
T(MPa)=F
H(kN)/(2×Wd(m
2)×cotφ)
在此，F
H係切刀所致之水平方向的荷重，W係切刀之寬度(m)，d係切刀之垂直方向之位移量(m)，φ為剪切角度。此外，剪切角度可因應切削條件、切削對象物之構成材料等變化，大致上為45°。此外，中間層之厚度與剪切破壞強度實質上具有比例關係，故中間層每1µm厚度之剪切破壞強度可由計算來求出。例如測定厚度0.5µm之中間層之剪切破壞強度時，令該測定值為2倍即可；而例如測定厚度2.0µm之中間層之剪切破壞強度時，令該測定值為1/2倍即可。
A. Outline of polarizing plate with hard coat layer FIG. 1 is a schematic cross-sectional view of a polarizing plate with hard coat layer according to one embodiment of the present invention. The polarizing
本發明實施形態中，附硬塗層之偏光板具有矩形以外之異形。本說明書中「具有矩形以外之異形」係指附硬塗層之偏光板之俯視形狀具有矩形(包含長方形、隅部去角時之情況)以外之形狀。異形代表上係經異形加工之異形加工部。因此，「具有矩形以外之異形的附硬塗層之偏光板」(以下有時稱為「異形偏光板」)不僅包含異形偏光板整體(即，用來規定偏光板之俯視形狀的外緣)為矩形以外之情況，還包含在自矩形偏光板之外緣往內退離之部分形成有異形加工部之情況。以附硬塗層之偏光板來說，在所述異形加工部中容易發生硬塗層之破損及/或裂痕，但根據本發明實施形態，可顯著抑制所述破損及裂痕。異形(異形加工部)例如如圖3及圖4所示，可列舉貫通孔、於俯視時成為凹部之切削加工部。凹部之代表例可列舉近似船形之形狀、矩形、近似浴缸形狀之R形狀、V字缺口、U字缺口。異形(異形加工部)之另一例如圖5及圖6所示，可舉與汽車之儀表盤對應之形狀。該形狀係外緣形成沿著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之V字形狀(包含R形狀)之部位。當然，異形(異形加工部)之形狀不限於圖式例。例如，貫通孔之形狀除圖式例之大致圓形外，還可因應目的採用任意適當之形狀(例如橢圓形、三角形、四角形、五角形、六角形、八角形)。又，貫通孔可因應目的設於任意適當之位置。貫通孔可如圖4所示設於矩形偏光板之長邊方向端部的大致中央部，可設於長邊方向端部之預定位置，亦可設於偏光板之隅部；雖未圖示，但可設於矩形偏光板之短邊方向端部；亦可如圖5或圖6所示，設於異形偏光板之中央部。如圖4所示，亦可設置複數個貫通孔。並且可視目的適當組合圖式例之形狀。例如，可於圖3之異形偏光板之任意位置形成貫通孔；亦可於圖5或圖6之異形偏光板之外緣的任意適當位置形成V字缺口及/或U字缺口。所述異形偏光板可適宜用於汽車儀表盤、智慧型手機、平板型PC或智慧手錶等影像顯示裝置。此外，異形包含R形狀時，其曲率半徑例如為0.2mm以上，又例如為1mm以上，又例如為2mm以上。另一方面，曲率半徑例如為10mm以下，又例如為5mm以下。In the embodiment of the present invention, the polarizing plate with a hard coat layer has an irregular shape other than a rectangle. In this specification, "having an irregular shape other than a rectangle" means that the top view shape of the polarizing plate with a hard coat layer has a shape other than a rectangle (including a rectangle and when the corners are chamfered). The special shape represents the special-shaped processing part that has been processed by special-shaped processing. Therefore, the "polarizing plate with a hard coat having an irregular shape other than a rectangle" (hereinafter sometimes referred to as "an irregularly shaped polarizing plate") includes not only the entire irregularly shaped polarizing plate (ie, the outer edge for defining the planar shape of the polarizing plate) The case other than the rectangular shape also includes the case where a deformed part is formed in the part retreated from the outer edge of the rectangular polarizing plate inwardly. In the case of a polarizing plate with a hard coat layer, breakage and/or cracks of the hard coat layer are likely to occur in the deformed portion, but according to the embodiment of the present invention, the breakage and cracks can be significantly suppressed. As an irregular shape (different shape processing part), as shown in FIG. 3 and FIG. 4, for example, a through hole and a cutting part which becomes a recessed part in a plan view are mentioned. Representative examples of the concave portion include a boat-like shape, a rectangle, an R-shape near a bathtub shape, a V-shaped notch, and a U-shaped notch. As another example of the deformed shape (special-shaped processing portion), as shown in FIGS. 5 and 6 , a shape corresponding to a dashboard of an automobile can be given. This shape is formed in an arc shape along the rotation direction of the meter needle at the outer edge, and includes a portion where the outer edge forms a V-shape (including an R shape) that protrudes inward in the surface direction. Of course, the shape of the deformed shape (different-shaped processed portion) is not limited to the illustrated example. For example, the shape of the through hole may be any appropriate shape (eg, ellipse, triangle, quadrangle, pentagon, hexagon, and octagon) according to the purpose, in addition to the substantially circular shape shown in the drawings. In addition, the through hole can be provided at any appropriate position according to the purpose. The through hole can be arranged in the approximate center of the end of the rectangular polarizer in the longitudinal direction as shown in FIG. 4 , can be arranged at a predetermined position of the end in the longitudinal direction, or can be arranged in the corner of the polarizer; although not shown in the figure , but it can be set at the end of the short-side direction of the rectangular polarizing plate; as shown in Figure 5 or Figure 6, it can also be set at the central part of the special-shaped polarizing plate. As shown in FIG. 4, a plurality of through holes may also be provided. And the shapes of the schematic examples can be appropriately combined according to the purpose. For example, through holes can be formed at any position of the special-shaped polarizer shown in FIG. 3 ; V-shaped notch and/or U-shaped notch can also be formed at any appropriate position on the outer edge of the special-shaped polarizer shown in FIG. 5 or 6 . The special-shaped polarizing plate can be suitably used for image display devices such as car dashboards, smart phones, tablet PCs or smart watches. In addition, when the irregular shape includes an R shape, the radius of curvature thereof is, for example, 0.2 mm or more, for example, 1 mm or more, or, for example, 2 mm or more. On the other hand, the curvature radius is, for example, 10 mm or less, or, for example, 5 mm or less.
附硬塗層之偏光板中，亦可因應需求在偏光件10之與保護層20為相反側配置另一保護層(未圖示)。此外，為求方便，有時會將保護層20稱為外側保護層、且將另一保護層稱為內側保護層。並且，附硬塗層之偏光板中，亦可於偏光件10之與保護層20為相反側(在有另一保護層存在時則為另一保護層之與偏光件為相反側)設置符合目的之任意適當之機能層。機能層之代表例可舉相位差層、導電層。機能層之種類、數量、組合等，可按目的適當設定。例如，相位差層之光學特性(例如折射率特性、面內相位差、Nz係數、光彈性係數)、厚度、配置位置等可按目的適當設定。In the polarizing plate with a hard coating, another protective layer (not shown) can also be arranged on the opposite side of the
於實際使用上，可設置黏著劑層(未圖示)作為附硬塗層之偏光板之與硬塗層為相反側的最外層，而可將附硬塗層之偏光板貼附於影像顯示單元。並且，在附硬塗層之偏光板供於使用之前，宜於黏著劑層之表面暫時黏附有剝離薄膜。藉由暫時黏附剝離薄膜，可在保護黏著劑層的同時形成附硬塗層之偏光板的捲料。In practical use, an adhesive layer (not shown) can be set as the outermost layer on the opposite side of the polarizing plate with a hard coating and the polarizing plate with a hard coating can be attached to the image display. unit. Also, before the polarizing plate with the hard coat layer is put into use, it is preferable that a release film is temporarily adhered to the surface of the adhesive layer. By temporarily adhering the release film, a roll of polarizing plate with a hard coat layer can be formed while protecting the adhesive layer.
以下針對附硬塗層之偏光板的構成要素進行更詳細說明。Hereinafter, the constituent elements of the polarizing plate with a hard coat layer will be described in more detail.
B.偏光件 偏光件代表上係以包含二色性物質之樹脂薄膜構成。就樹脂薄膜而言，可採用可作為偏光件使用之任意適當的樹脂薄膜。樹脂薄膜代表上為聚乙烯醇系樹脂(以下稱為「PVA系樹脂」)薄膜。樹脂薄膜可為單層樹脂薄膜亦可為二層以上之積層體。 B. Polarizer The polarizer is represented by a resin film containing a dichroic substance. As the resin film, any appropriate resin film that can be used as a polarizer can be used. The resin film is typically a polyvinyl alcohol-based resin (hereinafter referred to as "PVA-based resin") film. The resin film may be a single-layer resin film or a laminate of two or more layers.
由單層樹脂薄膜構成之偏光件的具體例，可舉已對PVA系樹脂薄膜施行利用碘進行之染色處理及延伸處理(代表上為單軸延伸)者。上述藉由碘進行之染色，例如可藉由將PVA系薄膜浸漬於碘水溶液中來進行。上述單軸延伸之延伸倍率宜為3~7倍。延伸可在染色處理後進行，亦可邊染色邊進行。又，亦可延伸後再染色。因應需求對PVA系樹脂薄膜施行膨潤處理、交聯處理、洗淨處理、乾燥處理等。例如，在染色前將PVA系樹脂薄膜浸漬於水中進行水洗，不僅可洗淨PVA系薄膜表面的污垢或抗黏結劑，還可使PVA系樹脂薄膜膨潤，從而防止染色不均等情況。As a specific example of the polarizer which consists of a single-layer resin film, the dyeing process with iodine and the stretching process (representatively, uniaxial stretching) are given to a PVA-type resin film. The above-mentioned dyeing with iodine can be performed, for example, by immersing a PVA-based film in an aqueous iodine solution. The stretching ratio of the above-mentioned uniaxial stretching is preferably 3 to 7 times. The stretching may be performed after the dyeing treatment, or may be performed while dyeing. Moreover, it is also possible to extend and then dye. The PVA-based resin film is subjected to swelling treatment, cross-linking treatment, cleaning treatment, drying treatment, etc. as required. For example, immersing the PVA-based resin film in water and washing it before dyeing can not only remove the dirt or anti-adhesive on the surface of the PVA-based film, but also swell the PVA-based resin film, thereby preventing uneven dyeing.
作為使用積層體而得之偏光件的具體例可舉使用樹脂基材與積層在該樹脂基材之PVA系樹脂層(PVA系樹脂薄膜)之積層體、或者是使用樹脂基材與塗佈形成於該樹脂基材之PVA系樹脂層之積層體而得之偏光件。使用樹脂基材與塗佈形成於該樹脂基材之PVA系樹脂層之積層體而得之偏光件，例如可藉由以下步驟來製作：將PVA系樹脂溶液塗佈於樹脂基材並使其乾燥，於樹脂基材上形成PVA系樹脂層，而獲得樹脂基材與PVA系樹脂層之積層體；及，將該積層體延伸及染色，以將PVA系樹脂層製成偏光件。在本實施形態中，延伸在代表上包含使積層體浸漬於硼酸水溶液中並延伸。並且視需要，延伸更可包含在硼酸水溶液中進行延伸前將積層體在高溫(例如95℃以上)下進行空中延伸。所得樹脂基材/偏光件之積層體可直接使用(即，亦可將樹脂基材作為偏光件之保護層)，亦可從樹脂基材/偏光件之積層體剝離樹脂基材並於該剝離面積層符合目的之任意適當的保護層後來使用。所述偏光件之製造方法之詳細內容記載於例如日本專利特開2012-73580號公報、日本專利第6470455號中。本說明書中即引用該等公報整體之記載作為參考。Specific examples of the polarizer obtained by using the laminate include a laminate using a resin substrate and a PVA-based resin layer (PVA-based resin film) laminated on the resin substrate, or a resin substrate and coating A polarizer obtained by a laminate of PVA-based resin layers on the resin substrate. A polarizer obtained by using a laminate of a resin substrate and coating a PVA-based resin layer formed on the resin substrate can be produced, for example, by the following steps: apply a PVA-based resin solution to a resin substrate and make it After drying, a PVA-based resin layer is formed on the resin substrate to obtain a laminate of the resin substrate and the PVA-based resin layer; and the laminate is extended and dyed to form the PVA-based resin layer into a polarizer. In the present embodiment, the stretching represents that the layered body is immersed in a boric acid aqueous solution and stretched. And if necessary, the stretching may further include in-air stretching of the laminate at a high temperature (eg, 95° C. or higher) before stretching in a boric acid aqueous solution. The obtained laminate of resin substrate/polarizer can be used as it is (that is, the resin substrate can also be used as a protective layer of the polarizer), or the resin substrate can be peeled off from the laminate of resin substrate/polarizer and the Any suitable protective layer suitable for the purpose of the area layer is then used. Details of the manufacturing method of the polarizer are described in, for example, Japanese Patent Laid-Open No. 2012-73580 and Japanese Patent No. 6470455 . The entirety of these publications is incorporated herein by reference.
偏光件之厚度宜為25µm以下，較宜為1µm~12µm，更宜為3µm~12µm，尤宜為3µm~8µm。偏光件之厚度若在所述範圍內，便可良好地抑制加熱時之捲曲，及可獲得良好的加熱時之外觀耐久性。The thickness of the polarizer is preferably 25µm or less, preferably 1µm~12µm, more preferably 3µm~12µm, especially 3µm~8µm. When the thickness of the polarizer is within the above range, curling during heating can be suppressed favorably, and favorable appearance durability during heating can be obtained.
偏光件宜在波長380nm~780nm之任一波長下顯示吸收二色性。偏光件之單體透射率例如為41.5%~46.0%，宜為43.0%~46.0%，較宜為44.5%~46.0%。偏光件之偏光度以97.0%以上為佳，99.0%以上較佳，99.9%以上更佳。The polarizer should exhibit absorption dichroism at any wavelength from 380nm to 780nm. The single transmittance of the polarizer is, for example, 41.5% to 46.0%, preferably 43.0% to 46.0%, and more preferably 44.5% to 46.0%. The degree of polarization of the polarizer is preferably above 97.0%, preferably above 99.0%, and even more preferably above 99.9%.
C.保護層 外側保護層及內側保護層(有時統稱為保護層)皆係以可作為偏光件之保護層使用之任意適當之薄膜形成。作為成為該薄膜之主成分的材料之具體例，可舉三醋酸纖維素(TAC)等之纖維素系樹脂、或聚酯系、聚乙烯醇系、聚碳酸酯系、聚醯胺系、聚醯亞胺系、聚醚碸系、聚碸系、聚苯乙烯系、聚降莰烯系、聚烯烴系、(甲基)丙烯酸系及乙酸酯系等之透明樹脂等。又，亦可舉(甲基)丙烯酸系、胺甲酸酯系、(甲基)丙烯酸胺甲酸酯系、環氧系、聚矽氧系等之熱硬化型樹脂或紫外線硬化型樹脂等。其他還可舉例如矽氧烷系聚合物等玻璃質系聚合物。又，亦可使用日本專利特開2001-343529號公報(WO01/37007)所記載之聚合物薄膜。作為該薄膜之材料，例如可以使用含有在側鏈具有取代或非取代之醯亞胺基之熱塑性樹脂與在側鏈具有取代或非取代之苯基以及腈基之熱塑性樹脂的樹脂組成物，可舉例如具有由異丁烯與N-甲基馬來醯亞胺構成之交替共聚物與丙烯腈-苯乙烯共聚物之樹脂組成物。該聚合物薄膜例如可為上述樹脂組成物之擠製成形物。 C. Protective layer Both the outer protective layer and the inner protective layer (sometimes collectively referred to as protective layers) are formed of any suitable film that can be used as a protective layer of a polarizer. Specific examples of the material used as the main component of the film include cellulose-based resins such as triacetate cellulose (TAC), polyester-based, polyvinyl alcohol-based, polycarbonate-based, polyamide-based, polymer Imide-based, polyether-based, poly-based, polystyrene-based, polynorbornene-based, polyolefin-based, (meth)acrylic-based and acetate-based transparent resins, etc. Moreover, (meth)acrylic type, urethane type, (meth)acrylate urethane type, epoxy type, polysiloxane type|system|group thermosetting resin, ultraviolet-curable resin, etc. are also mentioned. Other examples include glass-based polymers such as siloxane-based polymers. Moreover, the polymer film described in Unexamined-Japanese-Patent No. 2001-343529 (WO01/37007) can also be used. As the material of the film, for example, a resin composition containing a thermoplastic resin having a substituted or unsubstituted imide group in a side chain and a thermoplastic resin having a substituted or unsubstituted phenyl group and a nitrile group in the side chain can be used. For example, a resin composition having an alternating copolymer composed of isobutylene and N-methylmaleimide and an acrylonitrile-styrene copolymer is exemplified. The polymer film may be, for example, an extruded product of the above-mentioned resin composition.
外側保護層宜以三醋酸纖維素(TAC)薄膜或丙烯酸系樹脂薄膜構成，較佳可以TAC薄膜構成。藉由將外側保護層以所述薄膜構成，可良好地形成具有所期望厚度及剪切破壞強度之中間層。The outer protective layer is preferably composed of triacetate cellulose (TAC) film or acrylic resin film, preferably TAC film. By forming the outer protective layer with the above-mentioned thin film, an intermediate layer having a desired thickness and shear rupture strength can be formed favorably.
內側保護層(在有存在內側保護層時)在一實施形態中宜在光學上為各向同性。本說明書中，「在光學上為各向同性」意指面內相位差Re(550)為0nm~10nm，且厚度方向之相位差Rth(550)為-10nm~+10nm。內側保護層在另一實施形態中亦可為相位差薄膜、增亮薄膜、擴散薄膜等。The inner protective layer (if the inner protective layer is present) is preferably optically isotropic in one embodiment. In this specification, "optically isotropic" means that the in-plane retardation Re(550) is 0 nm to 10 nm, and the retardation Rth(550) in the thickness direction is -10 nm to +10 nm. In another embodiment, the inner protective layer may also be a retardation film, a brightness enhancement film, a diffusion film, or the like.
保護層之厚度可採用任意適當之厚度。保護層之厚度宜為5µm~200µm，15µm~45µm較佳，20µm~40µm更佳。The thickness of the protective layer can be any appropriate thickness. The thickness of the protective layer is preferably 5µm~200µm, preferably 15µm~45µm, and more preferably 20µm~40µm.
D.硬塗層 硬塗層宜具有H以上、較宜具有2H以上、更宜具有3H以上之鉛筆硬度。另一方面，硬塗層之鉛筆硬度宜為6H以下，較宜為5H以下。硬塗層之鉛筆硬度若在所述範圍內，則在將附硬塗層之偏光板應用於影像顯示裝置時，可賦予優異之表面保護性能。鉛筆硬度可依循JIS K 5400之「鉛筆硬度試驗」測定。 D. Hard coating The hard coat layer preferably has a pencil hardness of H or more, preferably 2H or more, and more preferably 3H or more. On the other hand, the pencil hardness of the hard coat layer is preferably 6H or less, more preferably 5H or less. If the pencil hardness of the hard coat layer is within the above range, when the polarizing plate with the hard coat layer is applied to an image display device, excellent surface protection performance can be imparted. The pencil hardness can be measured according to the "Pencil Hardness Test" of JIS K 5400.
硬塗層之厚度宜為5µm以下，較宜為0.5µm~4µm，更宜為1µm~3.5µm。硬塗層之厚度若在所述範圍內，便可實現優異之耐擦傷性。並且，藉由適當選擇硬塗層之材料與保護層之材料，可良好地形成具有所期望厚度及剪切破壞強度之中間層。The thickness of the hard coat layer is preferably 5µm or less, preferably 0.5µm~4µm, more preferably 1µm~3.5µm. If the thickness of the hard coat layer is within the above range, excellent scratch resistance can be achieved. In addition, by appropriately selecting the material of the hard coat layer and the material of the protective layer, an intermediate layer having a desired thickness and shear rupture strength can be formed favorably.
硬塗層只要可獲得本發明實施形態之效果，便可以任意適當之材料構成。硬塗層例如可為熱硬化性樹脂或游離輻射線(例如可見光、紫外線)硬化型樹脂之硬化層。宜為紫外線硬化型樹脂。因為可由簡便之操作及以高效率形成硬塗層。紫外線硬化型樹脂之具體例可列舉聚酯系、(甲基)丙烯酸系、胺甲酸酯系、醯胺系、聚矽氧系、環氧系、不飽和聚酯系之紫外線硬化型樹脂。(甲基)丙烯酸系紫外線硬化型樹脂包含胺甲酸酯(甲基)丙烯酸酯、聚酯(甲基)丙烯酸酯、環氧(甲基)丙烯酸酯。紫外線硬化型樹脂中可包含紫外線硬化型之單體、寡聚物、聚合物。理想的紫外線硬化型樹脂，可舉含有丙烯酸系單體成分或寡聚物成分之樹脂組成物，且該丙烯酸系單體成分或寡聚物成分宜具有2個以上、較宜具有3~6個紫外線聚合性官能基。代表上，紫外線硬化型樹脂中摻混有光聚合引發劑。The hard coat layer may be composed of any appropriate material as long as the effects of the embodiments of the present invention can be obtained. The hard coat layer may be, for example, a hardened layer of a thermosetting resin or an ion radiation (eg, visible light, ultraviolet) hardening resin. Preferably, it is a UV-curable resin. Because the hard coat layer can be formed with a simple operation and high efficiency. Specific examples of the UV-curable resin include polyester-based, (meth)acrylic-based, urethane-based, amide-based, polysiloxane-based, epoxy-based, and unsaturated polyester-based UV-curable resins. (Meth)acrylic-type ultraviolet curable resin includes urethane (meth)acrylate, polyester (meth)acrylate, and epoxy (meth)acrylate. The UV-curable resin may contain UV-curable monomers, oligomers, and polymers. The ideal UV-curable resin includes a resin composition containing an acrylic monomer component or oligomer component, and the acrylic monomer component or oligomer component preferably has 2 or more, preferably 3 to 6 components UV-polymerizable functional group. Typically, a photopolymerization initiator is blended into the UV-curable resin.
硬塗層可利用任意適當之方法形成。硬塗層宜可於保護層上塗敷硬塗層形成用樹脂組成物並使其乾燥，再對已乾燥之塗敷膜照射紫外線使其硬化來形成。藉由將硬塗層形成用樹脂組成物直接塗敷於保護層，可良好地形成中間層。The hard coat layer can be formed by any suitable method. The hard coat layer is preferably formed by coating a resin composition for forming a hard coat layer on the protective layer, drying it, and irradiating the dried coating film with ultraviolet rays to harden it. The intermediate layer can be favorably formed by directly applying the resin composition for forming a hard coat layer to the protective layer.
硬塗層之詳細內容記載於例如日本專利特開2011-237789號公報、日本專利特開2016-224443號公報中。本說明書中即援用該等公報之記載作為參考。The details of the hard coat layer are described in, for example, Japanese Patent Laid-Open No. 2011-237789 and Japanese Patent Laid-Open No. 2016-224443. In this specification, the descriptions of these gazettes are incorporated by reference.
E.中間層 中間層代表上如上述係包含硬塗層之成分與保護層之成分的相溶區域。換言之，中間層係硬塗層成分(實質上為硬塗層形成用組成物)滲透至保護層而形成之滲透層。藉由形成中間層，保護層與硬塗層可透過中間層牢固地密著，而可顯著抑制硬塗層之破損、裂痕及剝落。中間層中，宜為保護層成分之濃度從硬塗層側至保護層側連續變大。藉由保護層成分之濃度連續變化，可防止在中間層內因保護層成分之濃度變化而形成界面。結果可抑制中間層內之界面反射，而可獲得少有干涉不均之附硬塗層之偏光板。較佳為保護層成分之濃度從硬塗層至中間層連續變大，且從中間層至保護層連續變大。亦即，較宜不形成硬塗層與中間層之明確的界面、及中間層與保護層之明確的界面。若為所述構成，便可獲得干涉不均更少之附硬塗層之偏光板。 E. Middle layer The intermediate layer represents a compatible region containing the components of the hard coat layer and the components of the protective layer as described above. In other words, the intermediate layer is a permeable layer formed by permeating the protective layer with the hard coat layer component (substantially, the hard coat layer forming composition). By forming the intermediate layer, the protective layer and the hard coat layer can be firmly adhered through the intermediate layer, and breakage, cracks and peeling of the hard coat layer can be significantly suppressed. In the intermediate layer, the concentration of the protective layer component is preferably continuously increased from the hard coat layer side to the protective layer side. By continuously changing the concentration of the components of the protective layer, it is possible to prevent the formation of an interface in the intermediate layer due to changes in the concentration of the components of the protective layer. As a result, the interface reflection in the intermediate layer can be suppressed, and a polarizing plate with a hard coating with less interference unevenness can be obtained. It is preferable that the concentration of the protective layer component increases continuously from the hard coat layer to the intermediate layer, and increases continuously from the intermediate layer to the protective layer. That is, it is preferable not to form a clear interface between the hard coat layer and the intermediate layer, and a clear interface between the intermediate layer and the protective layer. With the above configuration, a polarizing plate with a hard coat layer with less interference unevenness can be obtained.
中間層之厚度如上述為0.1µm~8µm，宜為0.3µm~7.7µm，更宜為1.0µm~7.5µm，尤宜為1.2µm~7.5µm。又，中間層之厚度可為5.0µm以下，可為2.0µm以下，亦可為1.5µm以下。中間層之厚度若大於8µm，便有無法充分抑制異形加工部中硬塗層之破損及/或裂痕之情形。中間層之厚度若小於0.1µm，便有在高溫高濕環境下發生硬塗層剝落之情形。As mentioned above, the thickness of the intermediate layer is 0.1µm~8µm, preferably 0.3µm~7.7µm, more preferably 1.0µm~7.5µm, especially 1.2µm~7.5µm. Moreover, the thickness of the intermediate layer may be 5.0 µm or less, 2.0 µm or less, or 1.5 µm or less. If the thickness of the intermediate layer is greater than 8 µm, there may be cases where the breakage and/or cracking of the hard coat layer in the deformed part cannot be sufficiently suppressed. If the thickness of the intermediate layer is less than 0.1µm, the hard coat may peel off in a high temperature and high humidity environment.
中間層每1µm厚度之剪切破壞強度如上述為10MPa以上，宜為14MPa以上。中間層每1µm厚度之剪切破壞強度例如可為16MPa以上，又例如可為20MPa以上，又例如可為25MPa以上，又例如可為40MPa以上，又例如可為70MPa以上，又例如可為100MPa以上，又例如亦可為120MPa以上。中間層每1µm厚度之剪切破壞強度例如可為200MPa以下。中間層每1µm厚度之剪切破壞強度若在上述範圍內，便可顯著抑制異形加工部中硬塗層之破損及/或裂痕。The shear failure strength per 1µm thickness of the intermediate layer is 10MPa or more as above, preferably 14MPa or more. The shear failure strength of the intermediate layer per 1µm thickness can be, for example, 16 MPa or more, or 20 MPa or more, 25 MPa or more, 40 MPa or more, 70 MPa or more, or 100 MPa or more. , and, for example, may be 120 MPa or more. The shear failure strength per 1 µm thickness of the intermediate layer may be, for example, 200 MPa or less. If the shear failure strength per 1µm thickness of the intermediate layer is within the above range, the breakage and/or cracking of the hard coat layer in the deformed part can be significantly suppressed.
中間層之厚度及剪切破壞強度可藉由適當組合以下條件並設定來調整：形成硬塗層時之基材(最後會成為保護層)之構成材料及表面性狀、硬塗層之構成材料、硬塗層形成用組成物之組成(例如固體成分濃度、溶劑組成、或者添加物之種類、數量或添加量)、硬塗層之形成條件(例如塗膜之乾燥或加熱條件、紫外線之照射量或照射方法)。The thickness and shear failure strength of the intermediate layer can be adjusted by appropriately combining and setting the following conditions: the constituent materials and surface properties of the substrate (which will eventually become the protective layer) when the hard coat layer is formed, the constituent materials of the hard coat layer, The composition of the composition for forming the hard coat layer (such as the solid content concentration, the composition of the solvent, or the type, quantity or amount of additives), the formation conditions of the hard coat layer (such as the drying or heating conditions of the coating film, the irradiation amount of ultraviolet rays) or irradiation method).
F.影像顯示裝置 本發明實施形態之附硬塗層之偏光板如上述可適宜應用於影像顯示裝置。因此，包含附硬塗層之偏光板之影像顯示裝置亦包含於本發明實施形態中。影像顯示裝置代表上包含影像顯示單元與透過黏著劑層貼合於影像顯示單元之附硬塗層之偏光板。附硬塗層之偏光板代表上係配置於影像顯示單元之視辨側，且以使硬塗層成為在視辨側之方式配置。影像顯示裝置可舉例如液晶顯示裝置、有機電致發光(EL)顯示裝置、量子點顯示裝置。 F. Video display device The polarizing plate with a hard coat layer according to the embodiment of the present invention can be suitably applied to an image display device as described above. Therefore, an image display device including a polarizing plate with a hard coat layer is also included in the embodiments of the present invention. The image display device represents an image display unit and a polarizing plate with a hard coat attached to the image display unit through an adhesive layer. The polarizing plate with a hard coat layer means that it is arranged on the viewing side of the image display unit, and the hard coat layer is arranged on the viewing side. The image display device includes, for example, a liquid crystal display device, an organic electroluminescence (EL) display device, and a quantum dot display device.
實施例 以下，以實施例來具體說明本發明，惟本發明不受該等實施例限定。實施例之評估項目如下。又，無特別註記時，實施例中之「份」及「%」即為重量基準。 Example Hereinafter, the present invention will be specifically described with examples, but the present invention is not limited by these examples. The evaluation items of the examples are as follows. In addition, unless otherwise noted, "parts" and "%" in the examples are based on weight.
(1)厚度 使用干涉膜厚計(大塚電子公司製，製品名「MCPD-3000」)進行測定。 (2)剪切破壞強度 使用精密斜向切削裝置(例如DAIPLA WINTES CO., LTD.製，「SAICAS DN-20型」)將實施例及比較例所用硬塗層、中間層(比較例中有未形成中間層之情形)及保護層之積層體斜向切削，並由切削時之剪切強度求出剪切破壞強度。切削條件如下。 切刀：單晶鑽石製 刀寬：1mm 切刀之斜角：10° 切刀之水平速度：1µm/秒 切刀之垂直速度：0.05µm/秒 使用下述式求算中間層之剪切破壞強度T(MPa)，並換算成每1µm厚度之量。 T(MPa)=F H(kN)/(2×Wd(m 2)×cotφ) 在此，F H係切刀所致之水平方向的荷重，W係切刀之寬度(m)，d係切刀之垂直方向之位移量(m)，φ為45°。 (3)硬塗層之破損或裂痕 以光學顯微鏡(倍率：×5倍)拍攝實施例及比較例之附硬塗層之偏光板中貫通孔周邊部分。以肉眼從拍攝影像確認有無因形成貫通孔造成之硬塗層(具有中間層時包含中間層)之破損及裂痕，並按以下基準進行評估。 良好：確認無破損及裂痕中之任一者。 不良：確認有破損及/或裂痕。 (4)硬塗層之密著耐久性 將實施例及比較例之附硬塗層之偏光板在高溫高濕條件下(65℃及90%RH之烘箱中)放置72小時後，以肉眼確認有無硬塗層(具有中間層時包含中間層)剝落，並按以下基準進行評估。 良好：確認無剝落。 不良：確認有剝落。 (5)耐擦傷性 將實施例及比較例之附硬塗層之偏光板以使未形成有硬塗層之面朝下之方式載置於玻璃板上。將鋼絲絨#0000均勻安裝於直徑11mm之圓柱的平滑截面，並在荷重1.0kg下對試驗試樣表面以每秒約100mm之速度往復10次後，以肉眼確認硬塗層表面之損傷狀態，並按以下基準進行評估。 良好：確認無傷痕。 不良：確認有傷痕。 (1) Thickness was measured using an interference film thickness meter (manufactured by Otsuka Electronics Co., Ltd., product name "MCPD-3000"). (2) Shear failure strength Using a precision oblique cutting device (for example, "SAICAS DN-20 type" manufactured by DAIPLA WINTES CO., LTD.) The case where the intermediate layer is not formed) and the layered product of the protective layer are cut obliquely, and the shear failure strength is obtained from the shear strength during cutting. The cutting conditions are as follows. Knife: Single crystal diamond Knife width: 1mm Bevel angle of the knife: 10° Horizontal speed of the knife: 1µm/sec Vertical speed of the knife: 0.05µm/sec Use the following formula to calculate the shear failure of the intermediate layer Strength T (MPa), and converted into the amount per 1µm thickness. T(MPa)=F H (kN)/(2×Wd(m 2 )×cotφ) Here, F H is the horizontal load caused by the cutter, W is the width of the cutter (m), and d is the The displacement of the cutter in the vertical direction (m), φ is 45°. (3) Breakage or crack of hard coat layer The peripheral portion of the through hole in the polarizing plates with hard coat layers of Examples and Comparative Examples was photographed with an optical microscope (magnification: ×5 times). The presence or absence of breakage and cracks in the hard coat layer (including the intermediate layer when it has an intermediate layer) due to the formation of through-holes was visually confirmed from the photographed image, and evaluated according to the following criteria. Good: It was confirmed that there was no breakage or crack. Defective: Damage and/or cracks are confirmed. (4) Adhesion durability of hard coat layers The polarizing plates with hard coat layers of the examples and comparative examples were placed under high temperature and high humidity conditions (65°C and 90% RH oven) for 72 hours, and confirmed with the naked eye. The presence or absence of peeling of the hard coat layer (including the intermediate layer in the case of having an intermediate layer) was evaluated according to the following criteria. Good: No peeling was confirmed. Defect: Peeling was confirmed. (5) Scratch resistance The polarizing plate with a hard coat layer of an Example and a comparative example was mounted on a glass plate so that the surface on which the hard coat layer was not formed may face downward. Install steel wool #0000 evenly on a smooth section of a cylinder with a diameter of 11mm, and reciprocate 10 times on the surface of the test sample at a speed of about 100mm per second under a load of 1.0kg, and confirm the damage state of the surface of the hard coating with the naked eye. and evaluated against the following benchmarks. Good: No scratches were confirmed. Defect: Confirmed to have scratches.
＜實施例1＞
1.偏光板之製作
作為熱塑性樹脂基材係使用長條狀且Tg約75℃之非晶質間苯二甲酸共聚聚對苯二甲酸乙二酯薄膜(厚度：100µm)，並對樹脂基材之單面施行了電暈處理。
在以9：1混合聚乙烯醇(聚合度4200，皂化度99.2莫耳%)及乙醯乙醯基改質PVA(日本合成化學工業公司製，商品名「GOHSEFIMER」)而成之PVA系樹脂100重量份中添加碘化鉀13重量份，並將所得者溶於水中而調製出PVA水溶液(塗佈液)。
於樹脂基材之電暈處理面塗佈上述PVA水溶液並在60℃下乾燥，藉此形成厚度13µm之PVA系樹脂層，而製作出積層體。
將所得積層體於130℃之烘箱內沿縱向(長邊方向)進行單軸延伸成2.4倍(空中輔助延伸處理)。
接著，使積層體浸漬於液溫40℃的不溶解浴(相對於水100重量份摻混4重量份之硼酸而得之硼酸水溶液)中30秒鐘(不溶解處理)。
接著，於液溫30℃之染色浴(相對於水100重量份，以1：7之重量比摻混碘與碘化鉀而得之碘水溶液)中調整濃度的同時使其浸漬於其中60秒鐘，以使最後所得偏光件之單體透射率(Ts)成為所期望之值(染色處理)。
接著，使其浸漬於液溫40℃的交聯浴(相對於水100重量份摻混3重量份之碘化鉀並摻混5重量份之硼酸而得之硼酸水溶液)中30秒鐘(交聯處理)。
然後，一邊使積層體浸漬於液溫70℃之硼酸水溶液(硼酸濃度4重量%、碘化鉀濃度5重量%)中，一邊在周速相異之輥間沿縱向(長邊方向)進行單軸延伸以使總延伸倍率達5.5倍(水中延伸處理)。
之後，使積層體浸漬於液溫20℃的洗淨浴(相對於水100重量份摻混4重量份之碘化鉀而得之水溶液)中(洗淨處理)。
然後，一邊在保持在約90℃之烘箱中乾燥，一邊使其接觸表面溫度保持在約75℃之SUS製加熱輥(乾燥收縮處理)。
依上述方式，於樹脂基材上形成厚度約5µm之偏光件，而獲得具有樹脂基材/偏光件之構成的偏光板。
<Example 1>
1. Production of polarizing plate
As the thermoplastic resin base material, a long amorphous copolyethylene terephthalate film (thickness: 100µm) with Tg of about 75°C was used, and one side of the resin base material was electro- Halo treatment.
PVA-based resin obtained by mixing polyvinyl alcohol (degree of polymerization 4200, degree of saponification 99.2 mol%) and acetylacetate modified PVA (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., trade name "GOHSEFIMER") at a ratio of 9:1 13 parts by weight of potassium iodide was added to 100 parts by weight, and the resultant was dissolved in water to prepare an aqueous PVA solution (coating liquid).
The above-mentioned PVA aqueous solution was coated on the corona-treated surface of the resin substrate and dried at 60° C. to form a PVA-based resin layer with a thickness of 13 μm, thereby producing a laminate.
The obtained laminate was uniaxially stretched 2.4 times in the longitudinal direction (longitudinal direction) in an oven at 130° C. (a mid-air stretching treatment).
Next, the layered body was immersed in an insolubilization bath (a boric acid aqueous solution obtained by blending 4 parts by weight of boric acid with respect to 100 parts by weight of water) at a liquid temperature of 40° C. for 30 seconds (insolubility treatment).
Next, it was immersed for 60 seconds in a dyeing bath at a liquid temperature of 30° C. (an aqueous iodine solution obtained by mixing iodine and potassium iodide in a weight ratio of 1:7 with respect to 100 parts by weight of water) while adjusting the concentration. So that the single transmittance (Ts) of the polarizer finally obtained becomes a desired value (dyeing treatment).
Next, it was immersed in a cross-linking bath (a boric acid aqueous solution obtained by mixing 3 parts by weight of potassium iodide and 5 parts by weight of boric acid with respect to 100 parts by weight of water) for 30 seconds in a cross-linking bath (cross-linking treatment). ).
Then, while immersing the layered body in an aqueous solution of boric acid (
2.硬塗層及中間層之形成
作為硬塗層之膜形成成分係準備紫外線硬化型丙烯酸酯樹脂(東亞合成(股)製，商品名「M-920」，固體成分100%)50重量份、紫外線硬化型丙烯酸酯樹脂(Mitsubishi Chemical Co.製，商品名「UV1700-TL」，固體成分80%)50重量份。以該等樹脂之樹脂固體成分每100重量份，混合光聚合引發劑(BASF公司製，商品名「OMNIRAD907」)3重量份、調平劑(共榮社化學(股)製，商品名「LE-303」，固體成分40%)0.15重量份。將該混合物以MIBK/環戊酮混合溶劑(重量比70/30)稀釋成固體成分濃度成為30%，而調製出硬塗層形成用塗敷液。
作為基材(最後會成為保護層)係準備TAC薄膜(FUJIFILM(股)製，商品名「TJ25」，厚度25µm)。使用棒塗機將上述硬塗層形成用塗敷液塗敷於該基材之單面(於TAC薄膜流延時與空氣面相接之側的面：A面)而形成塗膜。接著，將形成有塗膜之基材在80℃下加熱1分鐘使該塗膜乾燥。之後，以高壓水銀燈照射累積光量300mJ/cm
2之紫外線，使塗膜硬化。依上述方式而獲得基材/硬化塗膜之積層體。硬化塗膜之整體厚度為2.6µm，其中硬塗層之厚度為1.3µm，中間層之厚度為1.3µm。中間層每1µm厚度之剪切破壞強度為125MPa。
2. Formation of hard coat layer and intermediate layer As the film forming component of the hard coat layer, prepare 50 parts by weight of ultraviolet curable acrylate resin (manufactured by Toagosei Co., Ltd., trade name "M-920",
3.附硬塗層之偏光板之製作
透過丙烯酸系黏著劑將上述2.所得基材/硬化塗膜之積層體以基材與偏光件鄰接之方式貼合於上述1.所得樹脂基材/偏光件之積層體(偏光板)的偏光件表面。接著，剝離樹脂基材，並於剝離面透過活性能量線硬化型接著劑(厚度0.7µm)貼合作為異形加工用襯底材之一般TAC薄膜。活性能量線硬化型接著劑係使用MCD塗佈機(富士機械公司製)(凹槽形狀：蜂巢狀，凹版輥筒線數：1000條/inch，旋轉速度140%/相對生產線速度)進行塗敷。接著，藉由活性能量線照射裝置從兩側照射可見光線，使活性能量線硬化型接著劑硬化後，在70℃下熱風乾燥3分鐘，而獲得具有硬塗層/中間層/保護層/偏光件/襯底材之構成的附硬塗層之偏光板。此外，活性能量線硬化型接著劑係依以下方式調製。
以自由基聚合性化合物(a)12重量份、自由基聚合性化合物(b)35重量份、自由基聚合性化合物(c)40重量份、寡聚物化合物(d)10重量份、光聚合引發劑(e)2重量份及光敏劑(f)1重量份之比率進行混合，在50℃下攪拌1小時而獲得活性能量線硬化型接著劑。此外，自由基聚合性化合物(a)係HEAA(羥乙基丙烯醯胺)(KJ Chemicals Corporation製)；自由基聚合性化合物(b)係ACMO(丙烯醯基嗎福林)(KJ Chemicals Corporation製)；自由基聚合性化合物(c)係LIGHT ACRYLATE 1,9ND-A(1,9-壬二醇二丙烯酸酯)(共榮社化學公司製)；寡聚物化合物(d)係ARUFON UG-4010(環氧基改質丙烯酸寡聚物)(東亞合成公司製)；光聚合引發劑(e)係Omnirad907(2-甲基-1-(4-甲硫基苯基)-2-嗎福林基丙1-酮)(IGM Resins B.V.公司製)；光敏劑(f)係KAYACURE DETX-S(2,4-二乙基9-氧硫𠮿
4.附硬塗層之偏光板的異形加工
將上述3.所得附硬塗層之偏光板沖裁成長142.0mm及寬66.8mm之尺寸且於4個角部設置有R 7.0mm之R部的形狀。此時係以偏光件之吸收軸方向為短邊方向之方式進行沖裁。並於距離長邊2mm及距離短邊2mm之位置形成直徑4.0mm的貫通孔。貫通孔係藉由端銑刀加工而形成。端銑刀之進給速度為750mm/分鐘，旋轉數為10000rpm，切屑量為0.1mm/次。依以上所述方式，而獲得具有貫通孔之附硬塗層之偏光板。將所得附硬塗層之偏光板供於上述(3)~(5)之評估。將結果列於表1。
4. Special-shaped processing of polarizing plate with hard coating
The polarizing plate with a hard coat layer obtained in the above 3. was punched out to a size of 142.0 mm in length and 66.8 mm in width, and the shape of an R portion of R 7.0 mm was provided at four corners. At this time, punching is carried out in such a way that the absorption axis direction of the polarizer is the short side direction. Through holes with a diameter of 4.0 mm were formed at
＜實施例2＞ 使用下述硬塗層形成用塗敷液形成整體厚度7.4µm之硬化塗膜，除此之外依與實施例1相同方式而獲得具有貫通孔之附硬塗層之偏光板。硬塗層之厚度為3.0µm，中間層之厚度為4.4µm。中間層每1µm厚度之剪切破壞強度為14MPa。將所得附硬塗層之偏光板供於與實施例1相同之評估。將結果列於表1。 作為硬塗層之膜形成成分係準備紫外線硬化型丙烯酸酯樹脂(DIC(股)製，商品名「LUXYDIR 17-806」，固體成分80%)100重量份。以樹脂固體成分每100重量份，混合光聚合引發劑(BASF公司製，商品名「OMNIRAD907」)3重量份、調平劑(DIC(股)製，商品名「GRANDIC PC4100」，固體成分10%)0.01重量份。將該混合物以PGME/環戊酮混合溶劑(重量比65/35)稀釋成固體成分濃度成為36%，而調製出硬塗層形成用塗敷液。 <Example 2> A hard-coat-attached polarizing plate having through-holes was obtained in the same manner as in Example 1, except that a hard-coat layer having an overall thickness of 7.4 µm was formed using the coating liquid for forming a hard-coat layer described below. The thickness of the hard coat layer is 3.0µm, and the thickness of the intermediate layer is 4.4µm. The shear failure strength of the intermediate layer per 1µm thickness is 14MPa. The obtained polarizing plate with a hard coat layer was used for the same evaluation as in Example 1. The results are listed in Table 1. As a film-forming component of the hard coat layer, 100 parts by weight of ultraviolet curable acrylate resin (manufactured by DIC Corporation, trade name "LUXYDIR 17-806", solid content 80%) was prepared. 3 parts by weight of a photopolymerization initiator (manufactured by BASF, trade name "OMNIRAD907"), a leveling agent (manufactured by DIC Corporation, trade name "GRANDIC PC4100", 10% solid content per 100 parts by weight of resin solid content ) 0.01 parts by weight. This mixture was diluted with a PGME/cyclopentanone mixed solvent (weight ratio 65/35) so that the solid content concentration was 36% to prepare a coating liquid for forming a hard coat layer.
＜實施例3＞
使用厚度40µm之TAC薄膜(FUJIFILM(股)製，商品名「TJ40」)作為基材(保護層)、使用下述硬塗層形成用塗敷液、將硬化前之塗膜在60℃下加熱1分鐘、及形成整體厚度10.1µm之硬化塗膜，除此之外依與實施例1相同方式而獲得具有貫通孔之附硬塗層之偏光板。硬塗層之厚度為3.3µm，中間層之厚度為6.8µm。中間層每1µm厚度之剪切破壞強度為18MPa。將所得附硬塗層之偏光板供於與實施例1相同之評估。將結果列於表1。
作為硬塗層之膜形成成分係準備紫外線硬化型丙烯酸酯樹脂(DIC(股)製，商品名「LUXYDIR 17-806」，固體成分80%)100重量份。以前述樹脂之樹脂固體成分每100重量份，混合光聚合引發劑(BASF公司製，商品名「OMNIRAD907」)3重量份、調平劑(DIC(股)製，商品名「GRANDIC PC4100」，固體成分10%)0.01重量份。將該混合物以PGME/環戊酮混合溶劑(重量比50/50)稀釋成固體成分濃度成為36%，而調製出硬塗層形成用塗敷液。
<Example 3>
A TAC film with a thickness of 40 µm (manufactured by FUJIFILM Co., Ltd., trade name "TJ40") was used as the base material (protective layer), the coating liquid for forming a hard coat layer described below was used, and the coating film before curing was heated at 60°C A polarizing plate with a hard coat layer having through-holes was obtained in the same manner as in Example 1, except that a hard coating film with a total thickness of 10.1 µm was formed for 1 minute. The thickness of the hard coat layer is 3.3µm, and the thickness of the intermediate layer is 6.8µm. The shear failure strength of the intermediate layer per 1µm thickness is 18MPa. The obtained polarizing plate with a hard coat layer was used for the same evaluation as in Example 1. The results are listed in Table 1.
As a film-forming component of the hard coat layer, 100 parts by weight of ultraviolet curable acrylate resin (manufactured by DIC Corporation, trade name "LUXYDIR 17-806", solid content 80%) was prepared. 3 parts by weight of a photopolymerization initiator (manufactured by BASF, trade name "OMNIRAD907"), a leveling agent (manufactured by DIC Corporation, trade name "GRANDIC PC4100",
＜實施例4＞
使用厚度25µm之TAC薄膜(FUJIFILM(股)製，商品名「TJ25UL」)作為基材(保護層)、及使用下述防眩層(anti-glare layer)形成用塗敷液形成整體厚度9.3µm之硬化塗膜，除此之外依與實施例1相同方式而獲得具有貫通孔之附硬塗層之偏光板。防眩層之厚度為1.8µm，中間層之厚度為7.5µm。中間層每1µm厚度之剪切破壞強度為27MPa。將所得附硬塗層之偏光板供於與實施例1相同之評估。將結果列於表1。
作為防眩層之膜形成成分係準備紫外線硬化型胺甲酸酯丙烯酸酯樹脂(Mitsubishi Chemical Co.製，商品名「UV1700B」)50重量份及以新戊四醇三丙烯酸酯為主成分之多官能丙烯酸酯(大阪有機化學工業(股)製，商品名「Viscoat #300」)50重量份。以該等樹脂之樹脂合計固體成分每100重量份，混合作為防眩層形成粒子之丙烯酸與苯乙烯之共聚粒子(積水化成品工業(股)製，「Techpolymer SSX1055QXE」)2重量份、作為觸變性賦予劑之合成膨潤石(KUNIMINE INDUSTRIES CO., LTD.製，「SUMECTON SAN」)1.5重量份、光聚合引發劑(BASF公司製，商品名「OMNIRAD907」)3重量份、調平劑(DIC(股)製，商品名「GRANDIC PC4100」，固體成分10%)0.15重量份。將該混合物以甲苯/環戊酮混合溶劑(重量比80/20)稀釋成固體成分濃度成為50%，而調製出防眩層形成用塗敷液。
<Example 4>
A TAC film with a thickness of 25µm (manufactured by FUJIFILM Co., Ltd., trade name "TJ25UL") was used as a substrate (protective layer), and the following coating solution for forming an anti-glare layer was used to form an overall thickness of 9.3µm A polarizing plate with a hard coat layer having through holes was obtained in the same manner as in Example 1 except that the hard coating film was obtained. The thickness of the anti-glare layer is 1.8µm, and the thickness of the intermediate layer is 7.5µm. The shear failure strength of the intermediate layer per 1µm thickness is 27MPa. The obtained polarizing plate with a hard coat layer was used for the same evaluation as in Example 1. The results are listed in Table 1.
As the film-forming components of the anti-glare layer, 50 parts by weight of an ultraviolet curable urethane acrylate resin (manufactured by Mitsubishi Chemical Co., trade name "UV1700B") and neopentaerythritol triacrylate as the main components were prepared 50 parts by weight of functional acrylate (manufactured by Osaka Organic Chemical Co., Ltd., trade name "Viscoat #300"). 2 parts by weight of copolymerized particles of acrylic acid and styrene (manufactured by Sekisui Chemical Industry Co., Ltd., "Techpolymer SSX1055QXE") as anti-glare layer-forming particles per 100 parts by weight of the total resin solid content of these resins, 1.5 parts by weight of synthetic bentonite (manufactured by KUNIMINE INDUSTRIES CO., LTD., "SUMECTON SAN"), denaturation imparting agent, 3 parts by weight of photopolymerization initiator (manufactured by BASF, trade name "OMNIRAD907"), leveling agent (DIC (stock) system, trade name "GRANDIC PC4100",
＜實施例5＞
以與實施例1相同方式製作出偏光板。另一方面，依以下方式形成硬塗層及中間層。作為硬塗層所含樹脂係準備紫外線硬化型丙烯酸酯樹脂(新中村化學(股)製，商品名「A-DCP」，固體成分100%)50重量份、紫外線硬化型丙烯酸酯樹脂(Mitsubishi Chemical Co.製，商品名「UV1700-TL」，固體成分80%)50重量份。以前述樹脂之樹脂固體成分每100重量份，混合光聚合引發劑(BASF公司製，商品名「OMNIRAD907」)5重量份、調平劑(共榮社化學(股)製，商品名「LE-303」，固體成分40%)0.2重量份。將該混合物以MIBK/環戊酮混合溶劑(重量比60/40)稀釋成固體成分濃度成為30%，而調製出硬塗層形成用塗敷液。作為基材(最後會成為保護層)係準備TAC薄膜(FUJIFILM(股)製，商品名「TJ25UL」)。使用棒塗機將上述硬塗層形成用塗敷液塗敷於該基材之單面(於TAC薄膜流延時與空氣面相接之側的面：A面)而形成塗膜。接著，將形成有塗膜之基材在60℃下加熱1分鐘使該塗膜乾燥。之後，以高壓水銀燈照射累積光量220mJ/cm
2之紫外線，使塗膜硬化。依上述方式而獲得基材/硬化塗膜之積層體。硬塗層之厚度為2.8µm，中間層之厚度為0.4µm。中間層每1µm厚度之剪切破壞強度為148MPa。
以下程序依與實施例1相同方式而獲得具有貫通孔之附硬塗層之偏光板。將所得附硬塗層之偏光板供於與實施例1相同之評估。將結果列於表1。
<Example 5> A polarizing plate was produced in the same manner as in Example 1. On the other hand, the hard coat layer and the intermediate layer were formed in the following manner. As the resin system contained in the hard coat layer, 50 parts by weight of UV-curable acrylate resin (manufactured by Shin-Nakamura Chemical Co., Ltd., trade name "A-DCP",
＜實施例6＞
以與實施例1相同方式製作出偏光板。另一方面，依以下方式形成硬塗層及中間層。作為硬塗層所含樹脂係準備紫外線硬化型丙烯酸酯樹脂(新中村化學(股)製，商品名「A-DCP」，固體成分100%)50重量份、紫外線硬化型丙烯酸酯樹脂(Mitsubishi Chemical Co.製，商品名「UV1700-TL」，固體成分80%)50重量份。以前述樹脂之樹脂固體成分每100重量份，混合光聚合引發劑(BASF公司製，商品名「OMNIRAD907」)5重量份、調平劑(共榮社化學(股)製，商品名「LE-303」，固體成分40%)0.1重量份。將該混合物以MIBK/環戊酮混合溶劑(重量比60/40)稀釋成固體成分濃度成為30%，而調製出硬塗層形成用塗敷液。作為基材(最後會成為保護層)係準備TAC薄膜(FUJIFILM(股)製，商品名「TJ25UL」)。使用棒塗機將上述硬塗層形成用塗敷液塗敷於該基材之單面(於TAC薄膜流延時與空氣面相接之側的面：A面)而形成塗膜。接著，將形成有塗膜之基材在60℃下加熱1分鐘使該塗膜乾燥。之後，以高壓水銀燈照射累積光量260mJ/cm
2之紫外線，使塗膜硬化。依上述方式而獲得基材/硬化塗膜之積層體。硬塗層之厚度為2.5µm，中間層之厚度為0.7µm。中間層每1µm厚度之剪切破壞強度為86MPa。
以下程序依與實施例1相同方式而獲得具有貫通孔之附硬塗層之偏光板。將所得附硬塗層之偏光板供於與實施例1相同之評估。將結果列於表1。
<Example 6> A polarizing plate was produced in the same manner as in Example 1. On the other hand, the hard coat layer and the intermediate layer were formed in the following manner. As the resin system contained in the hard coat layer, 50 parts by weight of UV-curable acrylate resin (manufactured by Shin-Nakamura Chemical Co., Ltd., trade name "A-DCP",
＜比較例1＞ 將硬化塗膜之整體厚度設為6.6µm、使用厚度25µm之TAC薄膜(Konica Minolta(股)製，商品名「KC2UA」)作為基材(保護層)、及於TAC薄膜之B面(於TAC薄膜流延時與支持體面相接之側的面)形成硬塗層，除此之外依與實施例2相同方式而獲得具有貫通孔之附硬塗層之偏光板。硬塗層之厚度為2.7µm，中間層之厚度為3.9µm。中間層之剪切破壞強度為9MPa。將所得附硬塗層之偏光板供於與實施例1相同之評估。將結果列於表1。 <Comparative Example 1> The overall thickness of the hardened coating film was set to 6.6 µm, and a TAC film with a thickness of 25 µm (Konica Minolta Co., Ltd., trade name "KC2UA") was used as the base material (protective layer), and the B side of the TAC film (on the TAC film) was used. A hard coat layer with through holes was obtained in the same manner as in Example 2, except that a hard coat layer was formed on the side that was in contact with the support surface during film casting. The thickness of the hard coat layer is 2.7µm, and the thickness of the intermediate layer is 3.9µm. The shear failure strength of the intermediate layer was 9 MPa. The obtained polarizing plate with a hard coat layer was used for the same evaluation as in Example 1. The results are listed in Table 1.
＜比較例2＞
使用下述硬塗層形成用塗敷液形成整體厚度8.7µm之硬化塗膜，除此之外依與比較例1相同方式而獲得具有貫通孔之附硬塗層之偏光板。硬塗層之厚度為3.3µm，中間層之厚度為5.4µm。中間層之剪切破壞強度為9MPa。將所得附硬塗層之偏光板供於與實施例1相同之評估。將結果列於表1。
作為硬塗層之膜形成成分係準備紫外線硬化型丙烯酸酯樹脂(DIC(股)製，商品名「LUXYDIR 17-806」，固體成分80%)100重量份。以前述樹脂之樹脂固體成分每100重量份，混合光聚合引發劑(BASF公司製，商品名「OMNIRAD907」)3重量份、調平劑(DIC(股)製，商品名「GRANDIC PC4100」，固體成分10%)0.01重量份。將該混合物以PGME/環戊酮/乙酸丁酯混合溶劑(重量比9/40/51)稀釋成固體成分濃度成為36%，而調製出硬塗層形成用塗敷液。
<Comparative Example 2>
A polarizing plate with a hard coat layer having through-holes was obtained in the same manner as in Comparative Example 1, except that a hard coat layer having a thickness of 8.7 µm was formed using the coating liquid for forming a hard coat layer described below. The thickness of the hard coat layer is 3.3µm, and the thickness of the intermediate layer is 5.4µm. The shear failure strength of the intermediate layer was 9 MPa. The obtained polarizing plate with a hard coat layer was used for the same evaluation as in Example 1. The results are listed in Table 1.
As a film-forming component of the hard coat layer, 100 parts by weight of ultraviolet curable acrylate resin (manufactured by DIC Corporation, trade name "LUXYDIR 17-806", solid content 80%) was prepared. 3 parts by weight of a photopolymerization initiator (manufactured by BASF, trade name "OMNIRAD907"), a leveling agent (manufactured by DIC Corporation, trade name "GRANDIC PC4100",
＜比較例3＞ 將硬化塗膜之整體厚度設為1.6µm、及使用厚度20µm之聚碳酸酯(PC)系樹脂薄膜(將Mitsubishi Chemical Co.製、商品名「DURABIO」擠製成形之薄膜)作為基材(保護層)，除此之外依與實施例2相同方式而獲得具有貫通孔之附硬塗層之偏光板。硬塗層之厚度為1.6µm，且未形成中間層。將所得附硬塗層之偏光板供於與實施例1相同之評估。將結果列於表1。 <Comparative Example 3> The overall thickness of the cured coating film was set to 1.6 µm, and a polycarbonate (PC)-based resin film with a thickness of 20 µm (a film extruded from Mitsubishi Chemical Co., trade name "DURABIO") was used as a base material (protection). layer), except that in the same manner as in Example 2, a polarizing plate with a through hole with a hard coat layer was obtained. The thickness of the hard coat layer was 1.6 µm, and no intermediate layer was formed. The obtained polarizing plate with a hard coat layer was used for the same evaluation as in Example 1. The results are listed in Table 1.
＜比較例4＞ 將硬化塗膜之整體厚度設為1.4µm、及使用厚度26µm之環狀烯烴系樹脂(COP)薄膜(日本ZEON公司製，商品名「ZF12」)作為基材(保護層)，除此之外依與實施例2相同方式而獲得具有貫通孔之附硬塗層之偏光板。硬塗層之厚度為1.4µm，且未形成中間層。將所得附硬塗層之偏光板供於與實施例1相同之評估。將結果列於表1。 <Comparative Example 4> The overall thickness of the cured coating film was 1.4 µm, and a 26 µm thick cyclic olefin resin (COP) film (manufactured by ZEON, Japan, trade name "ZF12") was used as the base material (protective layer), except that In the same manner as in Example 2, a polarizing plate with a through hole with a hard coat layer was obtained. The thickness of the hard coat layer was 1.4 µm, and no intermediate layer was formed. The obtained polarizing plate with a hard coat layer was used for the same evaluation as in Example 1. The results are listed in Table 1.
＜比較例5＞ 將硬化塗膜之整體厚度設為10.4µm、及使用厚度40µm之丙烯酸系樹脂薄膜(日東電工公司製，商品名「HX-40UF」)作為基材(保護層)，除此之外依與實施例2相同方式而獲得具有貫通孔之附硬塗層之偏光板。硬塗層之厚度為1.2µm，中間層之厚度為9.2µm。中間層之剪切破壞強度為17MPa。將所得附硬塗層之偏光板供於與實施例1相同之評估。將結果列於表1。 <Comparative Example 5> The entire thickness of the cured coating film was set to 10.4 µm, and the acrylic resin film (manufactured by Nitto Denko Co., Ltd., trade name "HX-40UF") with a thickness of 40 µm was used as the base material (protective layer). Example 2 In the same manner, a polarizing plate with a through hole with a hard coat layer was obtained. The thickness of the hard coat layer is 1.2µm, and the thickness of the intermediate layer is 9.2µm. The shear failure strength of the intermediate layer was 17 MPa. The obtained polarizing plate with a hard coat layer was used for the same evaluation as in Example 1. The results are listed in Table 1.
＜參考例＞ 將以實施例1~4及比較例1~5各自記載之構成製出之附硬塗層之偏光板沖裁成長142.0mm及寬66.8mm之尺寸。此時係以偏光件之吸收軸方向為短邊方向之方式進行沖裁。利用4邊形成10度角度之加工刀，以每0.5mm切削來進行端面加工。加工刀之進給速度為600mm/分鐘，旋轉數為6000rpm。依上述方式而獲得經端面加工之矩形之(亦即不具有異形之)附硬塗層之偏光板。將所得附硬塗層之偏光板分別供於上述(3)之評估後，以所有附硬塗層之偏光板來說皆獲得良好之結果。 <Reference example> The polarizing plate with a hard coat layer produced by the constitutions described in each of Examples 1 to 4 and Comparative Examples 1 to 5 was punched out to a size of 142.0 mm in length and 66.8 mm in width. At this time, punching is carried out in such a way that the absorption axis direction of the polarizer is the short side direction. The end face is processed by cutting every 0.5mm using a processing blade with four sides forming an angle of 10 degrees. The feed rate of the processing knife was 600 mm/min, and the number of revolutions was 6000 rpm. According to the above method, a rectangular (that is, no special-shaped) polarizing plate with a hard coating that has been end-faced is obtained. After the obtained polarizing plates with a hard coat layer were respectively subjected to the evaluation of the above (3), good results were obtained for all the polarizing plates with a hard coat layer.
[表1]
＜評估＞ 由表1明顯可知，根據本發明實施例，在具有異形加工部之附硬塗層之偏光板中，於保護層與硬塗層之間形成中間層，並令該中間層之厚度及每單位厚度之剪切破壞強度為預定值以上，藉此可顯著抑制異形加工部中硬塗層之破損及裂痕。並且，本發明實施例之附硬塗層之偏光板的硬塗層之密著耐久性及耐擦傷性亦優異。 ＜Assessment＞ It can be seen from Table 1 that, according to the embodiment of the present invention, in the polarizing plate with a hard coating with a special-shaped processing portion, an intermediate layer is formed between the protective layer and the hard coating, and the thickness of the intermediate layer and the per unit thickness of the intermediate layer are determined. The shear failure strength of the thickness is more than a predetermined value, whereby the breakage and cracking of the hard coat layer in the deformed part can be significantly suppressed. In addition, the hard coat layer of the polarizing plate with a hard coat layer of the examples of the present invention is also excellent in adhesion durability and scratch resistance.
產業上之可利用性 本發明附硬塗層之偏光板可適宜用於影像顯示裝置，尤其可適宜用於以汽車儀表盤、智慧型手機、平板型PC或智慧型手錶為代表之具有異形加工部之影像顯示裝置。 industrial availability The polarizing plate with a hard coating of the present invention can be suitably used in image display devices, especially image display devices with special-shaped processing parts represented by automobile dashboards, smart phones, tablet PCs or smart watches.
10:偏光件 20:保護層 30:中間層 40:硬塗層 100:附硬塗層之偏光板 d:切刀之垂直方向之位移量 F H:切刀所致之水平方向的荷重 W:切刀之寬度 10: polarizer 20: protective layer 30: intermediate layer 40: hard coating 100: polarizing plate with hard coating d: vertical displacement of the cutter F H : horizontal load caused by the cutter W: Knife width
圖1係本發明一實施形態之附硬塗層之偏光板的概略截面圖。 圖2係用以說明求算剪切破壞強度之具體程序的概略圖。 圖3係說明本發明實施形態之附硬塗層之偏光板的異形或異形加工部之一例的概略俯視圖。 圖4係說明本發明實施形態之附硬塗層之偏光板的異形或異形加工部之變形例的概略俯視圖。 圖5係說明本發明實施形態之附硬塗層之偏光板的異形或異形加工部之又一變形例的概略俯視圖。 圖6係說明本發明實施形態之附硬塗層之偏光板的異形或異形加工部之又一變形例的概略俯視圖。 FIG. 1 is a schematic cross-sectional view of a polarizing plate with a hard coat layer according to an embodiment of the present invention. FIG. 2 is a schematic diagram for explaining a specific procedure for calculating the shear fracture strength. 3 is a schematic plan view illustrating an example of a deformed or deformed portion of the polarizing plate with a hard coat layer according to the embodiment of the present invention. 4 is a schematic plan view illustrating a modification of the deformed or deformed portion of the polarizing plate with a hard coat layer according to the embodiment of the present invention. 5 is a schematic plan view illustrating still another modification of the deformed or deformed portion of the polarizing plate with a hard coat layer according to the embodiment of the present invention. 6 is a schematic plan view illustrating still another modification of the deformed or deformed portion of the polarizing plate with a hard coat layer according to the embodiment of the present invention.
10:偏光件 10: Polarizer
20:保護層 20: Protective layer
30:中間層 30: middle layer
40:硬塗層 40: Hard coating
100:附硬塗層之偏光板 100: polarizer with hard coating
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