TWI690415B - Polarizing film, image display apparatus, and method of producing polarizing film - Google Patents

Polarizing film, image display apparatus, and method of producing polarizing film Download PDF

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TWI690415B
TWI690415B TW107104486A TW107104486A TWI690415B TW I690415 B TWI690415 B TW I690415B TW 107104486 A TW107104486 A TW 107104486A TW 107104486 A TW107104486 A TW 107104486A TW I690415 B TWI690415 B TW I690415B
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support
polarizing film
polarizing
polarizing element
film
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TW107104486A
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TW201832912A (en
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上野友德
石原康隆
岸敦史
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日商日東電工股份有限公司
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/30Polarising elements
    • G02B5/3025Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Polarising Elements (AREA)
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Abstract

A polarizing film according to an embodiment of the present invention includes a polarizer and a support. The support is formed on at least one surface of the polarizer. The support has a pattern structure. The method of producing a polarizing film includes a step of forming a pattern of a resin material on at least one surface of a polarizer;and curing the resin material to provide a support having a pattern structure.

Description

偏光膜、圖像顯示裝置、及偏光膜之製造方法Polarizing film, image display device, and method of manufacturing polarizing film

本發明係關於一種偏光膜、圖像顯示裝置、及偏光膜之製造方法。The invention relates to a polarizing film, an image display device, and a method of manufacturing a polarizing film.

圖像顯示裝置所使用之先前之一般偏光板具備偏光元件與配置於偏光元件之單側或兩側之保護膜。偏光元件例如係藉由對聚乙烯醇系膜等親水性高分子膜實施利用碘或二色性染料等二色性物質之染色處理及延伸處理而獲得。又,近年來,隨著圖像顯示裝置所使用之光學構件之薄型化要求,已知有如下技術:藉由在樹脂基材之單側形成聚乙烯醇系樹脂層,對樹脂基材與聚乙烯醇系樹脂層之積層體實施染色處理及延伸處理,而獲得10 μm以下之薄型偏光元件(專利文獻1)。 [先前技術文獻] [專利文獻] [專利文獻1]日本專利特開2002-73580號公報The previous general polarizing plate used in the image display device includes a polarizing element and protective films disposed on one side or both sides of the polarizing element. The polarizing element is obtained, for example, by subjecting a hydrophilic polymer film such as a polyvinyl alcohol-based film to dyeing treatment and extension treatment using a dichroic substance such as iodine or a dichroic dye. In addition, in recent years, with the demand for thinner optical members used in image display devices, the following technique has been known: by forming a polyvinyl alcohol-based resin layer on one side of a resin substrate, The laminate of the vinyl alcohol-based resin layer is subjected to dyeing treatment and stretching treatment to obtain a thin polarizer having a thickness of 10 μm or less (Patent Document 1). [Prior Art Document] [Patent Document] [Patent Document 1] Japanese Patent Laid-Open No. 2002-73580

[發明所欲解決之問題] 然而,於偏光元件上積層保護膜而成之先前之偏光板無法充分滿足薄型化之要求,而要求進一步薄型化。另一方面,薄型之偏光元件單獨體之剛性較低(韌性較弱),不具有自支持性。因此,偏光元件單獨體之加工性較低。 本發明係為了解決上述先前之問題而成者,其主要目的在於提供具有自支持性且加工性優異之薄型之偏光膜、具備上述偏光膜之圖像顯示裝置、及偏光膜之製造方法。 [解決問題之技術手段] 本發明之偏光膜具備偏光元件與形成於上述偏光元件之至少一個面上之支持體,上述支持體具有圖案結構。 於一實施形態中,上述偏光元件之厚度為15 μm以下。 於一實施形態中,上述支持體具有選自由蜂窩結構、桁架結構、框架結構、條狀結構、及圓結構所組成之群中之至少任一種結構。 於一實施形態中,上述支持體之厚度為1 μm~15 μm。 於一實施形態中,俯視下之上述支持體之寬度為500 μm~3000 μm。 於一實施形態中,上述支持體於光學上具有等向性。 於一實施形態中,於上述偏光元件之上述一個面上具備將上述支持體包埋之包埋樹脂層。 於一實施形態中,上述支持體於23℃下之壓縮彈性模數為0.01 GPa~8.0 GPa。 根據本發明之另一態樣,提供一種圖像顯示裝置。該圖像顯示裝置具備上述偏光膜。 根據本發明之另一態樣,提供一種偏光膜之製造方法。該偏光膜之製造方法包括:於偏光元件之至少一個面上形成樹脂材料之圖案的步驟;與藉由使上述樹脂材料硬化而形成具有圖案結構之支持體的步驟。 [發明之效果] 根據本發明,可提供具有自支持性且加工性優異之薄型之偏光膜、具備上述偏光膜之圖像顯示裝置、及上述偏光膜之製造方法。[Problems to be Solved by the Invention] However, the previous polarizing plate formed by laminating a protective film on the polarizing element cannot sufficiently meet the requirement of thinning, and further thinning is required. On the other hand, the thin polarizing element alone has low rigidity (weak toughness) and is not self-supporting. Therefore, the workability of the polarizing element alone is low. The present invention was made to solve the aforementioned problems, and its main object is to provide a thin polarizing film having self-supportability and excellent processability, an image display device including the polarizing film, and a method of manufacturing the polarizing film. [Technical Means for Solving the Problems] The polarizing film of the present invention includes a polarizing element and a support formed on at least one surface of the polarizing element, and the support has a pattern structure. In one embodiment, the thickness of the polarizing element is 15 μm or less. In one embodiment, the support has at least any one structure selected from the group consisting of a honeycomb structure, a truss structure, a frame structure, a strip structure, and a circular structure. In one embodiment, the thickness of the support is 1 μm to 15 μm. In one embodiment, the width of the support in plan view is 500 μm to 3000 μm. In one embodiment, the support is optically isotropic. In one embodiment, an embedding resin layer for embedding the support is provided on the one surface of the polarizing element. In one embodiment, the compression modulus of the support at 23°C is 0.01 GPa to 8.0 GPa. According to another aspect of the present invention, an image display device is provided. This image display device includes the polarizing film. According to another aspect of the present invention, a method for manufacturing a polarizing film is provided. The manufacturing method of the polarizing film includes: a step of forming a pattern of a resin material on at least one surface of the polarizing element; and a step of forming a support having a pattern structure by hardening the resin material. [Effects of the Invention] According to the present invention, it is possible to provide a thin polarizing film having self-supportability and excellent processability, an image display device including the polarizing film, and a method of manufacturing the polarizing film.

以下,對本發明之實施形態進行說明,但本發明並不限定於該等實施形態。 A.偏光膜之整體構成 圖1係本發明之一實施形態之偏光膜的俯視圖。圖2係本發明之一實施形態之偏光膜的剖視圖。如圖2所示,偏光膜10具有偏光元件1與形成於偏光元件1之一個面上之支持體2。偏光膜10可為單片狀,亦可為長條狀。偏光元件1之厚度代表性而言為15 μm以下。支持體2之厚度代表性而言為1 μm~15 μm,俯視下之支持體2之寬度代表性而言為500 μm~3000 μm。支持體2較佳為透明,更佳為透明並且實質上於光學上具有等向性。支持體2具有圖案結構,作為圖案結構,代表性而言具有圖1所示之蜂窩結構。偏光膜10與單獨之偏光元件相比剛性更高(韌性較強),具有自支持性。因此,偏光膜10能夠抑制捲曲,並且操作性及加工性優異。又,偏光膜10與先前之偏光板相比,即便為薄型亦能夠維持膜形狀。 圖3~圖6係本發明之另一實施形態之偏光膜的俯視圖。支持體可具有如圖3所示之框架結構,亦可具有如圖4所示之桁架結構,亦可具有如圖5所示之圓結構(將圓配置為矩陣狀之結構),亦可具有如圖6所示之條狀結構。如此,於偏光元件1之表面形成圖案狀之支持體2之情形時,與於偏光元件1之整個表面形成支持體之情形相比,可減少構成支持體之材料之使用量。 圖7係本發明之又一實施形態之偏光膜的剖視圖。如圖7所示,偏光膜11於偏光元件1之一個面上具有支持體2(以下有時稱為第1支持體2),於偏光元件1之另一個面上具有支持體3(以下稱為第2支持體3)。第2支持體3具有圖案結構。第2支持體3之圖案結構可與第1支持體2之圖案結構相同,亦可不同。於第1支持體2之圖案結構與第2支持體3之圖案結構相同之情形時,較佳為如圖7所示第1支持體2與第2支持體3以俯視下相互重疊之部分之面積變小之方式配置。藉此,偏光膜11與僅於偏光元件之一個面上具有支持體之偏光膜相比,剛性更高,加工性更高。 圖8係本發明之又一實施形態之偏光膜的剖視圖。如圖8所示,偏光膜12於偏光元件1之一個面上具備將支持體2包埋之包埋樹脂層4。藉此,能夠使由支持體2所形成之階差平滑化。進而,包埋樹脂層4藉由覆蓋偏光元件1之露出部分,而可保護偏光元件1之表面。又,亦可將2個以上之上述實施形態加以組合。 偏光元件1代表性而言具有吸收軸。支持體2較佳為含有俯視下與偏光元件1之吸收軸交叉之部分。具體而言,於圖1所示之例中,支持體2具有蜂窩結構,俯視下構成蜂窩結構之六邊形之至少一條邊與偏光元件1之吸收軸交叉。更佳為沿著與偏光元件1之吸收軸平行之方向,從單片狀之偏光膜10之一端之任意點至另一端為止,至少於一處與支持體2交叉。先前之偏光元件於產生裂紋之情形時,上述裂紋會以使偏光元件開裂之方式沿著偏光元件之吸收軸方向行進。相對於此,本發明之偏光膜10具有支持體2,支持體2含有俯視下與偏光元件1之吸收軸交叉之部分,藉此支持體2會抑制偏光元件1之裂紋(裂縫)之行進。 偏光膜較佳為於實施扭轉試驗後沿著偏光元件之吸收軸方向不存在從一端延伸至另一端之裂紋、偏光膜之開裂、及漏光。扭轉試驗可使用YUASA SYSTEM機器公司製造之面狀體無負荷扭轉試驗機(產品名:主體TCDM111LH及治具:面狀體無負荷扭轉試驗治具)並按照以下順序進行。如圖9所示,將120 mm(吸收軸方向)×80 mm(透射軸方向)之單片狀之偏光膜10之兩條短邊用上述試驗機之扭轉用夾子18、19夾住固定後,在將一短邊用夾子19固定之情況下將另一短邊側之夾子18於下述條件下進行扭轉。 扭轉速度:10 rpm 扭轉角度:45度 扭轉次數:100次 偏光膜較佳為於實施U字形伸縮試驗後不存在偏光元件之斷裂、偏光膜之開裂、及漏光。U字形伸縮試驗可使用YUASA SYSTEM機器公司製造之面狀體無負荷U字形伸縮試驗機(產品名:主體DLDM111LH及治具:面狀體無負荷U字形伸縮試驗治具)並按照以下之順序進行。如圖10所示,將100 mm(吸收軸方向)×50 mm(透射軸方向)之單片狀之偏光膜10之兩端部x、y(50 mm)用雙面膠帶(未圖示)固定於上述試驗機之支持部21、22上後,於下述條件下進行偏光膜10之單面側(第1面)向內側形成U字形之伸縮,使偏光膜10彎曲(透射軸方向之第1面側之彎曲)。U字形伸縮係設定為彎曲R(彎曲半徑)成為3 mm,從平面之狀態彎曲至偏光膜10以對折狀態進行接觸為止。上述彎曲係藉由支持部之動作對兩端部x、y進行兩端部x、y之接觸,並且偏光膜10之其他部分係利用另外設置之板部23、24從兩外側無負荷地***至兩板部間而進行接觸。又,關於因上述伸縮引起之彎曲,對於偏光膜10之另一面側(第2面)亦同樣地進行向內側形成U字形之伸縮(透射軸方向之第2面側之彎曲)。 伸縮速度:30 rpm 彎曲R:3 mm 伸縮次數:100次 B.偏光元件 作為偏光元件,可採用任意適當之偏光元件。例如,形成偏光元件之樹脂膜可為單層之樹脂膜,亦可為兩層以上之積層體。 作為由單層樹脂膜構成之偏光元件之具體例,可列舉:聚乙烯醇(PVA)系膜、部分縮甲醛化PVA系膜,對乙烯-乙酸乙烯酯共聚物系部分皂化膜等親水性高分子膜實施利用碘或二色性染料等二色性物質之染色處理及延伸處理而獲得之膜,PVA之脫水處理物或聚氯乙烯之脫鹽酸處理物等多烯系配向膜等。利用碘對PVA膜進行染色並進行單軸延伸而獲得之偏光元件由於光學特性優異,故而可較佳地使用。 上述利用碘之染色例如係藉由將PVA膜浸漬於碘水溶液中而進行。上述單軸延伸之延伸倍率較佳為3~7倍。延伸可於染色處理後進行,亦可一邊染色一邊進行。又,延伸後亦可進行染色。視需要對PVA系膜實施膨潤處理、交聯處理、洗淨處理、乾燥處理等。例如藉由在染色前將PVA系膜浸漬於水中進行水洗,不僅可洗淨PVA系膜表面之污物或抗黏連劑,而且可使PVA系膜膨潤而防止染色不均等。 作為使用積層體所獲得之偏光元件之具體例,可列舉樹脂基材與積層於該樹脂基材上之PVA系樹脂層(PVA系樹脂膜)之積層體,或使用樹脂基材與塗佈形成於該樹脂基材上之PVA系樹脂層之積層體而獲得之偏光元件。使用樹脂基材與塗佈形成於該樹脂基材上之PVA系樹脂層之積層體而獲得之偏光元件例如可藉由如下方式製作:於樹脂基材上塗佈PVA系樹脂溶液,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;將該積層體延伸及染色,而將PVA系樹脂層製成偏光元件。於本實施形態中,延伸代表性而言包括將積層體浸漬於硼酸水溶液中進行延伸。進而,延伸視需要亦可包括:於硼酸水溶液中之延伸之前,於高溫(例如95℃以上)下對積層體進行空中延伸。所獲得之樹脂基材/偏光元件之積層體可直接使用(即,可將樹脂基材作為偏光元件之保護層),亦可從樹脂基材/偏光元件之積層體剝離樹脂基材,於該剝離面上根據目的積層任意適當之保護層而使用。此種偏光元件之製造方法之詳細內容記載於例如日本專利特開2002-73580號公報中。該公報之全部記載係作為參考而引用至本說明書中。 偏光元件之厚度較佳為15 μm以下,更佳為2 μm~10 μm,尤佳為3 μm~8 μm。若偏光元件之厚度為此種範圍內,則能夠良好地抑制加熱時之捲曲,並且能夠獲得良好之加熱時之外觀耐久性。 偏光元件較佳為於波長為380 nm~780 nm之任一波長下顯示出吸收二色性。偏光元件之單獨體透射率較佳為42.0%~46.0%,更佳為44.5%~46.0%。偏光元件之偏光度較佳為97.0%以上,更佳為99.0%以上,進而較佳為99.9%以上。 C.支持體 支持體具有如上所述之圖案結構。支持體較佳為具有選自由蜂窩結構、桁架結構、框架結構、條狀結構、及圓結構所組成之群中之至少任一種結構。支持體更佳為具有蜂窩結構、桁架結構、或圓結構,尤佳為具有蜂窩結構或圓結構。其原因在於,於支持體具有蜂窩結構、桁架結構、或圓結構之情形時,當偏光膜於一方向上受到應力時,可於與該方向不同之方向上分散應力,結果能夠抑制偏光元件產生裂紋。 支持體較佳為透明且實質上於光學上具有等向性。於本說明書中,「實質上於光學上具有等向性」係指相位差值小至實質上不影響偏光膜之光學特性之程度。例如支持體之面內相位差Re(550)及厚度方向相位差Rth(550)分別較佳為20 nm以下,更佳為10 nm以下。此處,「Re(550)」係於23℃下利用波長為550 nm之光所測得之面內相位差。Re(550)於將層(膜)之厚度設為d(nm)時根據式:Re(550)=(nx-ny)×d而求出。「Rth(550)」係於23℃下利用波長為550 nm之光所測得之厚度方向之相位差。Rth(550)於將層(膜)之厚度設為d(nm)時根據式:Rth(550)=(nx-nz)×d而求出。再者,「nx」係面內之折射率達到最大之方向(即遲相軸方向)之折射率,「ny」係於面內與遲相軸正交之方向(即進相軸方向)之折射率,「nz」係厚度方向之折射率。 支持體之厚度如上所述較佳為1 μm~15 μm,更佳為3 μm~8 μm。支持體之厚度(t2)相對於偏光元件之厚度(t1)之比(t2/t1)較佳為0.13~5.00,更佳為0.38~4.00,進而較佳為0.63~3.33。 支持體於23℃下之壓縮彈性模數較佳為0.01 GPa~8.0 GPa,更佳為0.02 GPa~6.0 GPa。藉此,能夠抑制偏光元件之裂紋之行進,並且提高偏光膜之加工性及可撓性。 支持體只要滿足上述構成且與偏光元件具有充分之密接性,則可藉由任意適當之材料及方法而形成。支持體對於偏光元件之密接性可依據JIS K5400之棋盤格剝離試驗進行評價。支持體對於偏光元件之密接性較佳為於上述棋盤格剝離試驗(棋盤格數:100個)中剝離數為0。 於一實施形態中,具有圖案結構之支持體可藉由在偏光元件之表面形成樹脂材料或含有樹脂材料之塗佈液之圖案,並使樹脂材料硬化(或固化)而形成。於另一實施形態中,支持體可藉由在偏光元件之表面蒸鍍SiO2 等無機氧化物而形成。 作為上述樹脂材料,只要能夠獲得本發明之效果,可使用任意適當之材料。作為上述樹脂材料,例如可列舉聚酯系樹脂、聚醚系樹脂、聚碳酸酯系樹脂、聚胺基甲酸酯系樹脂、聚矽氧系樹脂、聚醯胺系樹脂、聚醯亞胺系樹脂、PVA系樹脂、丙烯酸系樹脂、環氧系樹脂、氟系樹脂。該等可單獨使用,亦可組合(例如混合、共聚合)而使用。 於偏光元件之表面上形成上述樹脂材料或上述塗佈液之圖案之方法並無特別限定。作為上述方法,例如可列舉印刷、光微影、噴墨、噴嘴、模塗等。上述樹脂材料或上述塗佈液之圖案較佳為藉由印刷而形成。作為將塗佈液印刷為圖案狀之方法,可列舉凸版印刷法、直接凹版印刷法、凹版印刷法、平版印刷法、孔版印刷法等。塗佈液除上述樹脂材料以外,亦可於無損本發明效果之範圍內含有任意適當之其他成分。作為如此之其他成分,例如可列舉:作為主成分之上述樹脂材料以外之樹脂成分、增黏劑、無機填充劑、有機填充劑、金屬粉、顏料、箔狀物、軟化劑、抗老化劑、導電劑、紫外線吸收劑、抗氧化劑、光穩定劑、表面潤滑劑、調平劑、防腐劑、耐熱穩定劑、聚合抑制劑、潤滑劑、溶劑、觸媒等。 作為使上述樹脂材料(塗佈液)硬化(或固化)之條件,可根據樹脂材料之種類及組合物之組成等而適當設定。例如可藉由乾燥、活性能量線硬化、熱硬化等使樹脂材料硬化(或固化)。 D.包埋樹脂層 包埋樹脂層如上所述將形成於偏光元件之一面上之支持體包埋。包埋樹脂層之厚度厚於支持體之厚度,較佳為3 μm~150 μm,更佳為5 μm~100 μm。包埋樹脂層亦可為根據偏光膜所要求之特性而形成之任意適當之功能層。作為上述功能層,例如可列舉硬塗層、黏著劑層、透明光學黏著層等。於包埋樹脂層為硬塗層之情形時,其厚度例如為5 μm~15 μm,於包埋樹脂層為黏著劑層之情形時,其厚度例如為5 μm~30 μm,於包埋樹脂層為透明光學黏著層之情形時,其厚度例如為25 μm~125 μm。包埋樹脂層較佳為透明且實質上於光學上具有等向性。 包埋樹脂層只要與偏光元件及支持體具有充分之密接性,則可藉由任意適當之材料及方法而形成。於一實施形態中,包埋樹脂層可利用與支持體不同種類之樹脂材料而形成。包埋樹脂層可藉由在偏光元件之表面形成樹脂層以將支持體包埋,並使樹脂層硬化而形成。 於偏光元件之表面上形成上述樹脂層之方法並無特別限定。於一實施形態中,可藉由將包含樹脂材料之塗佈液塗佈至偏光元件之表面上,而形成樹脂層。作為塗佈方法,可使用任意適當之塗佈方法。作為具體例,可列舉淋幕式塗佈法、浸漬塗佈法、旋轉塗佈法、印刷塗佈法、噴霧塗佈法、狹縫塗佈法、輥塗佈法、斜板式塗佈法、刮刀塗佈法、凹版塗佈法、線棒塗佈法。硬化條件可根據所使用之樹脂材料之種類及組合物之組成等而適當設定。塗佈液除上述樹脂材料以外,亦可於無損本發明效果之範圍內含有任意適當之其他成分。作為如此之其他成分,例如可列舉:作為主成分之上述樹脂材料以外之樹脂成分、增黏劑、無機填充劑、有機填充劑、金屬粉、顏料、箔狀物、軟化劑、抗老化劑、導電劑、紫外線吸收劑、抗氧化劑、光穩定劑、表面潤滑劑、調平劑、防腐劑、耐熱穩定劑、聚合抑制劑、潤滑劑、溶劑、觸媒等。 E.第2支持體 如上所述,於第1支持體之圖案結構與第2支持體之圖案結構相同之情形時,第2支持體較佳為以俯視下與第1支持體重疊部分之面積變小之方式配置。第2支持體之構成、功能等如關於支持體(第1支持體)之C項中之說明所述。 F.其他光學膜及圖像顯示裝置 偏光膜可以積層有相位差膜等其他光學膜之光學積層體之形式使用。又,上述A項至E項中所記載之上述偏光膜及上述光學積層體可應用於液晶顯示裝置等圖像顯示裝置。因此,本發明包括使用有上述偏光膜之圖像顯示裝置。本發明之實施形態之圖像顯示裝置具備上述A項至E項中所記載之偏光膜。 [實施例] 以下,列舉實施例說明本發明,但本發明不限於以下所示之實施例。再者,各例中之份及%均為重量基準。以下,無特別規定之室溫放置條件均為23℃、65%RH。 1.偏光元件之製作 <製造例1> 對吸水率為0.75%、Tg為75℃之非晶質之間苯二甲酸共聚合聚對苯二甲酸乙二酯(IPA共聚合PET)膜(厚度:100 μm)基材之單面實施電暈處理,於該電暈處理面上,於25℃下塗佈以9:1之比含有聚乙烯醇(聚合度為4200,皂化度為99.2莫耳%)及乙醯乙醯基改性PVA(聚合度為1200,乙醯乙醯基改性度為4.6%,皂化度為99.0莫耳%以上,日本合成化學工業公司製造,商品名「GOHSEFIMER Z200」)之水溶液並乾燥,形成厚度為11 μm之PVA系樹脂層,而製作積層體。將所獲得之積層體於120℃之烘箱內於圓周速度不同之輥間沿縱向(長度方向)進行自由端單軸延伸(空中輔助延伸處理)至2.0倍。繼而,將積層體於液溫為30℃之不溶浴(對水100重量份調配硼酸4重量份而獲得之硼酸水溶液)中浸漬30秒(不溶處理)。繼而,於液溫為30℃之染色浴中,一邊以偏光板成為特定之透射率調整碘濃度、浸漬時間一邊浸漬。於本製造例中,於對水100重量份調配碘0.2重量份並調配碘化鉀1.0重量份而獲得之碘水溶液中浸漬60秒(染色處理)。繼而,於液溫為30℃之交聯浴(對水100重量份調配碘化鉀3重量份並調配硼酸3重量份而獲得之硼酸水溶液)中浸漬30秒(交聯處理)。其後,將積層體浸漬於液溫為70℃之硼酸水溶液(對水100重量份調配硼酸4重量份並調配碘化鉀5重量份而獲得之水溶液)中,同時於圓周速度不同之輥間沿縱向(長度方向)進行單軸延伸至總延伸倍率成為5.5倍(水中延伸處理)。其後,將積層體浸漬於液溫為30℃之洗淨浴(對水100重量份調配碘化鉀4重量份而獲得之水溶液)中(洗淨處理)。由此獲得含有厚度為5 μm之偏光元件的偏光元件積層體A。 <製造例2> 將塗佈乾燥後之PVA系樹脂層之厚度變更為15 μm,除此以外,與製造例1同樣地製作含有厚度為7 μm之偏光元件的偏光元件積層體B。 <製造例3> 將平均聚合度為2400、皂化度為99.9莫耳%之厚度為30 μm之聚乙烯醇膜於30℃之溫水中浸漬60秒,使其膨潤。繼而,浸漬於碘/碘化鉀(重量比=0.5/8)之濃度為0.3%之水溶液中,一邊延伸至3.5倍一邊對膜進行染色。其後,於65℃之硼酸酯水溶液中延伸至總延伸倍率成為6倍。延伸後,於40℃之烘箱中乾燥3分鐘,而獲得PVA系偏光元件C。所獲得之偏光元件C之厚度為12 μm。 2.支持體形成材料之製作 <製造例4> 對丙烯酸胺基甲酸酯寡聚物(日本合成化學公司製造、「紫光UV7560B」)100份加入N-(2-羥基乙基)丙烯醯胺(Kohjin公司製造、「HEAA」)20份、光起始劑(BASF公司製造,「IRUGACURE 907」)3份,使用甲基異丁基酮作為溶劑,而獲得以能夠以指定膜厚進行塗佈之方式調整固形物成分濃度的塗劑A。 <製造例5> 對丙烯酸胺基甲酸酯寡聚物(日本合成化學公司製造、「紫光UV7000B」)100份加入N-(2-羥基乙基)丙烯醯胺(Kohjin公司製造、「HEAA」)20份、光起始劑(BASF公司製造,「IRUGACURE 907」)3份,使用甲基異丁基酮作為溶劑,而獲得以能夠以指定膜厚進行塗佈之方式調整固形物成分濃度的塗劑B。 <製造例6> 對丙烯酸胺基甲酸酯寡聚物(日本合成化學公司製造、「紫光UV3520TL」)100份加入N-(2-羥基乙基)丙烯醯胺(Kohjin公司製造、「HEAA」)20份、光起始劑(BASF公司製造,「IRUGACURE 907」)3份,使用甲基異丁基酮作為溶劑,而獲得以能夠以指定膜厚進行塗佈之方式調整固形物成分濃度的塗劑C。 <製造例7> 對丙烯酸胺基甲酸酯寡聚物(日本合成化學公司製造、「紫光UV6640B」)100份加入N-(2-羥基乙基)丙烯醯胺(Kohjin公司製造、「HEAA」)20份、光起始劑(BASF公司製造,「IRUGACURE 907」)3份,使用甲基異丁基酮作為溶劑,而獲得以能夠以指定膜厚進行塗佈之方式調整固形物成分濃度的塗劑D。 <製造例8> 使用紫外線硬化型網版油墨(screen ink)(帝國油墨股份有限公司製造,「UV FIL網版油墨611白」(固形物成分為76%))、稀釋溶劑(帝國油墨股份有限公司製造,「RE-806 reducer」,而獲得以能夠以指定膜厚進行塗佈之方式調整固形物成分濃度的塗劑E。 <製造例9> 對丙烯酸胺基甲酸酯寡聚物(日本合成化學公司製造,「紫光UV1700」)100份加入N-(2-羥基乙基)丙烯醯胺(Kohjin公司製造,「HEAA」)20份、光起始劑(BASF公司製造,「IRUGACURE 907」)3份,使用甲基異丁基酮作為溶劑,而獲得以能夠以指定膜厚進行塗佈之方式調整固形物成分濃度的塗劑F。 <實施例1> 將上述塗劑A以硬化後之厚度成為7 μm之方式在上述偏光元件積層體A之偏光元件側之面上塗佈成蜂窩狀,於60℃、120秒之條件下使其乾燥。再者,塗劑之塗佈係使用精密台式印刷機(NEWLONG精密工業股份有限公司製造,「DP-320型」)與成形為蜂窩狀圖案之網版(網眼尺寸為#500、線徑為18 μm、厚度為38 μm、乳劑厚度為10 μm)。 其後,藉由利用高壓水銀燈照射累積光量為500 mJ/cm2 之紫外線,使塗劑硬化,而形成蜂窩結構(線寬:1.0 mm,正六邊形之一條邊之長度:4.0 mm)之支持體(第1支持體)。繼而,於上述支持體上貼合表面保護膜(日東電工公司製造,「RP301」),將上述偏光元件積層體A之非結晶性PET基材剝離。其後,藉由將表面保護膜剝離,而製作具有偏光元件與第1支持體之偏光膜1。 <實施例2> 使用塗劑B作為塗劑,除此以外,與實施例1同樣地製作偏光膜2。 <實施例3> 使用塗劑C作為塗劑,除此以外,與實施例1同樣地製作偏光膜3。 <實施例4> 使用塗劑D作為塗劑,除此以外,與實施例1同樣地製作偏光膜4。 <實施例5> 使用塗劑E作為塗劑,除此以外,與實施例1同樣地製作偏光膜5。 <實施例6> 將上述塗劑E以硬化後之厚度成為7 μm之方式在上述偏光元件積層體A之偏光元件側之面上塗佈成蜂窩狀,於60℃、120秒之條件下使其乾燥。又,塗劑之塗佈係使用精密台式印刷機(NEWLONG精密工業股份有限公司製造,「DP-320型」)與成形為蜂窩狀圖案之網版(網眼尺寸為#500、線徑為18 μm、厚度為38 μm、乳劑厚度為10 μm)。 其後,藉由利用高壓水銀燈照射累積光量為500 mJ/cm2 之紫外線,使塗劑硬化,而形成蜂窩結構(線寬:1.0 mm,正六邊形之一條邊之長度:4.0 mm)之支持體(第1支持體)。繼而,於上述支持體上貼合表面保護膜(日東電工公司製造,「RP301」),將上述偏光元件積層體A之非結晶性PET基材剝離。 繼而,使用上述塗劑E,於偏光元件之與形成有第1支持體之面相反側之面上,以俯視下與第1支持體重疊之方式與第1支持體同樣地形成蜂窩結構(線寬:1.0 mm,正六邊形之一條邊之長度:4.0 mm)之第2支持體。其後,藉由將表面保護膜剝離,而製作具有偏光元件與第1及第2支持體之偏光膜6。 <實施例7> 將第1及第2支持體之厚度設為3 μm,除此以外,與實施例6同樣地製作偏光膜7。 <實施例8> 將第1及第2支持體之厚度設為5 μm,除此以外,與實施例6同樣地製作偏光膜8。 <實施例9> 將第1及第2支持體之厚度設為14 μm,除此以外,與實施例6同樣地製作偏光膜9。 <實施例10> 以俯視下第2支持體之正六邊形之頂點與第1支持體之正六邊形之中心重疊之方式(俯視下第1支持體與第2支持體之位置相互錯開之方式)形成第2支持體,除此以外,與實施例6同樣地製作偏光膜10。 <實施例11> 使用偏光元件積層體B作為偏光元件積層體,除此以外,與實施例10同樣地製作偏光膜11及附帶黏著劑層之偏光膜11。 <實施例12> 於上述偏光元件C之一面上,以硬化後之厚度成為7 μm之方式將上述塗劑E塗佈為蜂窩狀,於60℃、120秒之條件下使其乾燥。又,塗劑之塗佈係使用精密台式印刷機(NEWLONG精密工業股份有限公司製造,「DP-320型」)與成形為蜂窩狀圖案之網版(網眼尺寸為#500、線徑為18 μm、厚度為38 μm、乳劑厚度為10 μm)。 其後,藉由利用高壓水銀燈照射累積光量為500 mJ/cm2 之紫外線,使塗劑硬化,而形成蜂窩結構(線寬:1.0 mm、正六邊形之一條邊之長度:4.0 mm)之支持體(第1支持體)。繼而,於上述支持體上貼合表面保護膜(日東電工公司製、「RP301」)。 繼而,使用上述塗劑E,於偏光元件C之與形成有第1支持體之面相反側之面上,以俯視下第2支持體之正六邊形之頂點與第1支持體之正六邊形之中心重疊之方式(俯視下第1支持體與第2支持體之位置相互錯開之方式)與第1支持體同樣地形成蜂窩結構(線寬:1.0 mm,正六邊形之一條邊之長度:4.0 mm)之第2支持體。其後,藉由將表面保護膜剝離,而製作具有偏光元件與第1及第2支持體之偏光膜12。 <實施例13> 將第1及第2支持體之蜂窩結構之線寬設為1.8 mm,除此以外,與實施例10同樣地製作偏光膜13。 <實施例14> 將第1及第2支持體之蜂窩結構之線寬設為0.8 mm,將正六邊形之一條邊之長度設為3.0 mm,除此以外,與實施例10同樣地製作偏光膜14。 <實施例15> 將第1及第2支持體之蜂窩結構之線寬設為0.5 mm,將正六邊形之一條邊之長度設為2.0 mm,除此以外,與實施例10同樣地製作偏光膜15。 <實施例16> 將第1及第2支持體之蜂窩結構之線寬設為1.5 mm,將正六邊形之一條邊之長度設為2 mm,除此以外,與實施例10同樣地製作偏光膜16。 <實施例17> 使用成形為桁架圖案之網版(網眼尺寸為#500、線徑為18 μm、厚度為38 μm、乳劑厚度為10 μm)塗佈塗劑,將第1及第2支持體製成桁架結構(線寬:0.6 mm、三角形之一條邊之長度為4.0 mm),並以俯視下第2支持體之三角形之頂點與第1支持體之三角形之中心重疊之方式(俯視下第1支持體與第2支持體之位置相互錯開之方式)形成第2支持體,除此以外,與實施例10同樣地製作偏光膜17。 <實施例18> 將第1及第2支持體之桁架結構之線寬設為0.5 mm,將三角形之一條邊之長度設為5.5 mm,除此以外,與實施例17同樣地製作偏光膜18。 <實施例19> 使用成形為框架狀圖案之網版(網眼尺寸為#500、線徑為18 μm、厚度為38 μm、乳劑厚度為10 μm)塗佈塗劑,將第1及第2支持體製成框架結構(線寬:1.0 mm,正方形之一條邊之長度:4.0 mm),並以俯視下第2支持體之正方形之頂點與第1支持體之正方形之中心重疊之方式(俯視下第1支持體與第2支持體之位置相互錯開之方式)形成第2支持體,除此以外,與實施例10同樣地製作偏光膜19。 <實施例20> 將第1及第2支持體之框架結構之線寬設為1.3 mm,將三角形之一條邊之長度設為3.0 mm,除此以外,與實施例19同樣地製作偏光膜20。 <實施例21> 使用成形為條狀圖案之網版(網眼尺寸為#500、線徑為18 μm、厚度為38 μm、乳劑厚度為10 μm)塗佈塗劑,將第1及第2支持體製成沿著與偏光元件之吸收軸正交之方向延伸之條狀結構(線寬:1.0 mm,條紋間隔:4.0 mm),並以俯視下與第1支持體重疊之方式形成第2支持體,除此以外,與實施例6同樣地製作偏光膜21。 <實施例22> 使用塗劑F作為塗劑,且將支持體之厚度設為5 μm,除此以外,與實施例1同樣地製作偏光膜22。 <比較例1> 將表面保護膜(日東電工公司製、「RP301」)貼合至上述偏光元件積層體A之偏光元件側之面上,並將上述偏光元件積層體A之非結晶性PET基材剝離。其後,將表面保護膜剝離,藉此製作包含偏光元件之偏光膜23。 <比較例2> 將第1及第2支持體製成沿著與偏光元件之吸收軸平行之方向延伸之條狀結構,除此以外,與實施例21同樣地製作偏光膜24。 <比較例3> 將上述偏光元件C作為偏光膜25。 <比較例4> 將N-羥乙基丙烯醯胺(HEAA)40重量份、丙烯醯嗎啉(ACMO)60重量份、與光起始劑(BASF公司製造,「IRGACURE 819」)3重量份加以混合,而製備紫外線硬化型接著劑。 於上述偏光元件積層體A之偏光元件側之面上,以硬化後之厚度成為1 μm之方式塗佈上述接著劑,並貼合對具有內酯環結構之(甲基)丙烯酸樹脂膜之易接著處理面實施電暈處理而成之保護膜(厚度:40 μm)後,照射紫外線作為活性能量線,而使接著劑硬化。再者,紫外線照射係使用封入有鎵之金屬鹵化物燈(Fusion UV Systems,Inc公司製造,產品名「Light HAMMER10」,燈泡:V形燈泡,峰值照度:1600 mW/cm2 ,累計照射量為1000/mJ/cm2 (波長為380~440 nm))。紫外線之照度係使用分光照度計(Solatell公司製造,產品名「Sola-Check系統」)進行測定。 繼而,將偏光元件積層體A之非結晶性PET基材剝離,而製作具有偏光元件與保護膜之偏光膜26。 <比較例5> 使用對具有內酯環結構之(甲基)丙烯酸樹脂膜之易接著處理面實施電暈處理而成之保護膜(厚度:20 μm)作為保護膜,除此以外,與比較例4同樣地製作偏光膜27。 (評價) 將偏光膜1~27供於以下之密接性試驗、扭轉試驗、及U字形伸縮試驗。將評價結果示於表1。 <密接性試驗> 依據JIS K5400之棋盤格剝離試驗(棋盤格數:100個)測定第1支持體對於偏光元件之密接性,並基於以下基準進行評價。 ○:第1支持體之剝離數為0。 ×:第1支持體之剝離數為1個以上。 <扭轉試驗> 使用YUASA SYSTEM機器公司製造之面狀體無負荷扭轉試驗機(產品名:主體TCDM111LH)及治具(面狀體無負荷扭轉試驗治具)進行。將扭轉試驗之情況示於圖9。 將偏光膜切成120 mm(吸收軸方向)×80 mm(透射軸方向)之尺寸作為試驗用樣品。將上述樣品之兩短邊利用上述試驗機之扭轉用夾子18、19夾住固定後,在利用夾子19固定一短邊之情況下,於下述條件下扭轉另一短邊側之夾子18。 扭轉速度:10 rpm 扭轉角度:45度 扭轉次數:100次 藉由目視並基於以下基準評價扭轉試驗後之樣品之狀態。又,於有因樣品之變形或捲曲導致無法測定之樣品之情形時,將該樣品判定為無法測定。 ○:未發生開裂及漏光。且未殘留折痕。 △:未發生開裂及漏光。但殘留折痕。 ×:發生開裂及漏光。且殘留折痕。 <U字形伸縮試驗> 使用YUASA SYSTEM機器公司製造之面狀體無負荷U字形伸縮試驗機(產品名:主體DLDM111LH)及治具(面狀體無負荷U字形伸縮試驗治具)進行。將U字形伸縮試驗之情況示於圖10。 將偏光膜切成100 mm(吸收軸方向)×50 mm(透射軸方向)之尺寸作為試驗用樣品。將上述樣品之兩端部利用雙面膠帶(未圖示)固定於上述試驗機之夾固部分21、22上之後,於下述條件下進行上述樣品之單面側(第1面)向內側形成U字形之伸縮,使上述樣品彎曲。關於U字形伸縮,以彎曲R(彎曲半徑)成為3 mm之方式進行設定,從平面之狀態將樣品彎曲成對折狀態。上述彎曲係藉由夾具之動作進行兩端部x、y之接觸,並且試樣之其他部分係利用另外設置之板部23、24從兩外側無負荷地***至兩板部間。 又,上述利用伸縮之彎曲於上述矩形物之另一面側(第2面)上亦與上述同樣地進行向內側形成為U字形之伸縮。 伸縮速度:30 rpm 彎曲R:3 mm 伸縮次數:100次 藉由目視基於下述標準評價U字形伸縮試驗之樣品之狀態。又,於有因試樣之變形或捲曲導致無法測定之樣品之情形時,將該樣品判定為無法測定。 ○:未發生開裂與漏光。並未殘留折痕。 ×:發生開裂或漏光。或確認到折痕。 <支持體之壓縮彈性模數> 按以下順序測定支持體於23℃下之壓縮彈性模數。 將塗劑A以硬化後之厚度成為5 μm之方式塗佈於偏光元件積層體A之偏光元件側之面上,於60℃、120秒之條件下使其乾燥,藉此製作於偏光元件積層體A上形成有包含塗劑A之硬化物之層的樣品A。同樣地使用塗劑B~F製作樣品B~F。使用上述所製作之樣品A~F,藉由下述方法測定壓縮彈性模數,將藉由測定而獲得之壓縮彈性模數之值作為支持體A~F於23℃下之壓縮彈性模數。 壓縮彈性模數之測定係使用TI900 TriboIndenter(Hysitron公司製造)。 將上述所獲得之樣品切割成10 mm×10 mm之尺寸,固定於具有TriboIndenter之支持體上,藉由奈米壓痕法測定壓縮彈性模數。此時,以所用壓頭壓入上述硬化物之中心部附近之方式調整位置。測定條件如下所示。 所用壓頭:Berkovich(三角錐形) 測定方法:單一壓入測定 測定溫度:23℃ 壓入深度設定:100 nm 支持體A~F於23℃下之壓縮彈性模數如下。 支持體A(塗劑A):2.57 GPa 支持體B(塗劑B):0.84Gpa 支持體C(塗劑C):0.07 GPa 支持體D(塗劑D):0.42 GPa 支持體E(塗劑E):0.02 GPa 支持體F(塗劑F):5.38 GPa [表1]

Figure 107104486-A0304-0001
由表1明確,比較例1~3之偏光膜之操作性(自支持性)較低,達到無法進行扭轉試驗與U字形伸縮試驗之測定之程度。又,比較例4及5之偏光膜發生開裂及漏光,且留下折痕。 相對於此,實施例1~22之偏光膜於密接性試驗、扭轉試驗及U字形伸縮試驗中之任一評價中均為良好之結果。 [產業上之可利用性] 本發明之偏光膜適用於液晶顯示裝置、有機EL顯示裝置等圖像顯示裝置。Hereinafter, embodiments of the present invention will be described, but the present invention is not limited to these embodiments. A. Overall configuration of polarizing film FIG. 1 is a plan view of a polarizing film according to an embodiment of the present invention. 2 is a cross-sectional view of a polarizing film according to an embodiment of the present invention. As shown in FIG. 2, the polarizing film 10 has a polarizing element 1 and a support 2 formed on one surface of the polarizing element 1. The polarizing film 10 may be monolithic or elongated. The thickness of the polarizing element 1 is typically 15 μm or less. The thickness of the support 2 is typically 1 μm to 15 μm, and the width of the support 2 in plan view is typically 500 μm to 3000 μm. The support 2 is preferably transparent, more preferably transparent, and substantially optically isotropic. The support 2 has a pattern structure, and as a pattern structure, typically has a honeycomb structure shown in FIG. 1. The polarizing film 10 has higher rigidity (stronger toughness) than the polarizing element alone, and has self-supporting properties. Therefore, the polarizing film 10 can suppress curling and is excellent in handleability and workability. In addition, the polarizing film 10 can maintain the film shape even if it is thin compared to the previous polarizing plate. 3 to 6 are plan views of polarizing films according to another embodiment of the present invention. The supporting body may have a frame structure as shown in FIG. 3, a truss structure as shown in FIG. 4, a round structure as shown in FIG. 5 (a circle is arranged in a matrix structure), or may have The strip structure shown in Figure 6. In this way, when the pattern-shaped support 2 is formed on the surface of the polarizing element 1, compared with the case where the support is formed on the entire surface of the polarizing element 1, the amount of materials constituting the support can be reduced. 7 is a cross-sectional view of a polarizing film according to still another embodiment of the present invention. As shown in FIG. 7, the polarizing film 11 has a support 2 (hereinafter sometimes referred to as a first support 2) on one surface of the polarizing element 1, and a support 3 (hereinafter referred to as the following) on the other surface of the polarizing element 1 It is the second support 3). The second support 3 has a pattern structure. The pattern structure of the second support 3 may be the same as or different from the pattern structure of the first support 2. When the pattern structure of the first support 2 and the pattern structure of the second support 3 are the same, it is preferable that the portions of the first support 2 and the second support 3 overlap each other in plan view as shown in FIG. 7 Configured in such a way that the area becomes smaller. As a result, the polarizing film 11 has higher rigidity and higher workability than a polarizing film having a support on only one surface of the polarizing element. 8 is a cross-sectional view of a polarizing film according to still another embodiment of the present invention. As shown in FIG. 8, the polarizing film 12 includes an embedding resin layer 4 embedding the support 2 on one surface of the polarizing element 1. This makes it possible to smooth the step formed by the support 2. Furthermore, the embedded resin layer 4 can protect the surface of the polarizing element 1 by covering the exposed portion of the polarizing element 1. In addition, two or more of the above embodiments may be combined. The polarizing element 1 typically has an absorption axis. The support 2 preferably includes a portion that crosses the absorption axis of the polarizing element 1 in a plan view. Specifically, in the example shown in FIG. 1, the support 2 has a honeycomb structure, and at least one side of the hexagon that constitutes the honeycomb structure crosses the absorption axis of the polarizing element 1 in plan view. It is more preferable to intersect the support 2 at least in one place from any point to the other end of the monolithic polarizing film 10 in a direction parallel to the absorption axis of the polarizing element 1. In the case of a crack in the previous polarizing element, the crack will travel in the direction of the absorption axis of the polarizing element in such a way that the polarizing element cracks. In contrast, the polarizing film 10 of the present invention has a support 2 that includes a portion that crosses the absorption axis of the polarizing element 1 in plan view, whereby the support 2 suppresses the travel of cracks (cracks) of the polarizing element 1. The polarizing film preferably has no cracks extending from one end to the other end, cracking of the polarizing film, and light leakage along the absorption axis direction of the polarizing element after the torsion test is performed. The torsion test can be carried out in the following order using a flat body unloaded torsion test machine (product name: main body TCDM111LH and fixture: flat body unloaded torsion test fixture) manufactured by YUASA SYSTEM. As shown in FIG. 9, the two short sides of the monolithic polarizing film 10 of 120 mm (absorption axis direction)×80 mm (transmission axis direction) are clamped and fixed by the torsion clamps 18 and 19 of the above test machine In the case of fixing one short side with the clip 19, twist the clip 18 on the other short side under the following conditions. Twisting speed: 10 rpm Twisting angle: 45 degrees Twisting times: 100 times The polarizing film preferably has no breakage of the polarizing element, cracking of the polarizing film, and light leakage after the U-shaped stretching test. The U-shaped expansion and contraction test can be carried out by using the flat body unloaded U-shaped expansion and contraction test machine (product name: main body DLDM111LH and jig: flat body and unloaded U-shaped expansion and contraction test fixture) manufactured by YUASA SYSTEM MACHINERY CO., LTD. in the following order . As shown in FIG. 10, use a double-sided adhesive tape (not shown) to apply x, y (50 mm) at both ends of a single-piece polarizing film 10 of 100 mm (absorption axis direction)×50 mm (transmission axis direction) After being fixed to the support parts 21 and 22 of the above test machine, the uniaxial side of the polarizing film 10 (the first surface) is stretched inward to form a U-shape under the following conditions to bend the polarizing film 10 (in the transmission axis direction) The first side is curved). The U-shaped expansion and contraction system is set so that the bending R (bending radius) becomes 3 mm, and it bends from a flat state until the polarizing film 10 comes into contact in a half-folded state. The above-mentioned bending is to contact the both ends x, y by the action of the supporting part, and the other parts of the polarizing film 10 are inserted from both outer sides with no load using the additionally provided plate portions 23, 24 Make contact between the two plate parts. In addition, regarding the bending due to the above-mentioned stretching, the other surface side (second surface) of the polarizing film 10 is also stretched inwardly formed in a U-shape (bending on the second surface side in the transmission axis direction). Stretching speed: 30 rpm Bending R: 3 mm Stretching times: 100 times B. Polarizing element As a polarizing element, any appropriate polarizing element can be used. For example, the resin film forming the polarizing element may be a single-layer resin film or a laminate of two or more layers. Specific examples of the polarizing element composed of a single-layer resin film include polyvinyl alcohol (PVA)-based films, partially formalized PVA-based films, and high hydrophilicity to ethylene-vinyl acetate copolymer-based partially saponified films. The molecular film is a film obtained by dyeing treatment and extension treatment using a dichroic substance such as iodine or a dichroic dye, a polyene-based alignment film such as a dehydration treatment product of PVA or a dehydrochlorination treatment product of polyvinyl chloride, and the like. The polarizing element obtained by dyeing the PVA film with iodine and uniaxially extending it is excellent in optical characteristics, and therefore can be preferably used. The above dyeing with iodine is performed, for example, by immersing the PVA film in an aqueous iodine solution. The stretching ratio of the uniaxial stretching is preferably 3 to 7 times. Elongation can be carried out after dyeing, or it can be carried out while dyeing. In addition, it can be dyed after stretching. The PVA-based film is subjected to swelling treatment, cross-linking treatment, washing treatment, drying treatment, etc. as necessary. For example, by immersing the PVA film in water for washing before dyeing, not only can the dirt or anti-blocking agent on the surface of the PVA film be washed away, but also the PVA film can be swollen to prevent uneven dyeing. As a specific example of the polarizing element obtained by using the laminate, a laminate of a resin substrate and a PVA-based resin layer (PVA-based resin film) laminated on the resin substrate, or using a resin substrate and coating A polarizing element obtained by stacking a PVA-based resin layer on the resin substrate. A polarizing element obtained by using a laminate of a resin substrate and a PVA-based resin layer formed on the resin substrate can be produced, for example, by applying a PVA-based resin solution on the resin substrate and drying it , 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; the laminate is stretched and dyed, and the PVA-based resin layer is made into a polarizing element. In the present embodiment, stretching typically includes immersing the laminate in a boric acid aqueous solution to perform stretching. Furthermore, the extension may include, if necessary, extending the laminate in the air at a high temperature (for example, 95° C. or higher) before the extension in the boric acid aqueous solution. The obtained resin substrate/polarizer lamination can be used directly (that is, the resin substrate can be used as a protective layer of the polarizer), or the resin substrate can be peeled from the resin substrate/polarizer lamination. Any appropriate protective layer is laminated on the peeling surface according to the purpose and used. The details of the manufacturing method of such a polarizing element are described in, for example, Japanese Patent Laid-Open No. 2002-73580. All the descriptions in this gazette are incorporated herein by reference. The thickness of the polarizing element is preferably 15 μm or less, more preferably 2 μm to 10 μm, and particularly preferably 3 μm to 8 μm. If the thickness of the polarizing element is within such a range, curling during heating can be suppressed satisfactorily, and good appearance durability during heating can be obtained. The polarizing element preferably exhibits absorption dichroism at any wavelength of 380 nm to 780 nm. The individual body transmittance of the polarizing element is preferably 42.0% to 46.0%, more preferably 44.5% to 46.0%. The polarization degree of the polarizing element is preferably 97.0% or more, more preferably 99.0% or more, and still more preferably 99.9% or more. C. Support The support has a pattern structure as described above. The support preferably has at least any one structure selected from the group consisting of a honeycomb structure, a truss structure, a frame structure, a strip structure, and a round structure. The support is more preferably a honeycomb structure, a truss structure, or a round structure, and particularly preferably a honeycomb structure or a round structure. The reason is that, when the support has a honeycomb structure, a truss structure, or a round structure, when the polarizing film is stressed in one direction, the stress can be dispersed in a direction different from that direction, and as a result, the polarizing element can be prevented from cracking. . The support is preferably transparent and substantially isotropic optically. In this specification, "substantially optically isotropic" means that the phase difference value is so small that it does not substantially affect the optical characteristics of the polarizing film. For example, the in-plane phase difference Re (550) and the thickness direction phase difference Rth (550) of the support are preferably 20 nm or less, more preferably 10 nm or less. Here, "Re(550)" is the in-plane phase difference measured at 23°C using light having a wavelength of 550 nm. Re(550) is obtained from the formula: Re(550)=(nx-ny)×d when the thickness of the layer (film) is d (nm). "Rth(550)" is the phase difference in the thickness direction measured at 23°C using light having a wavelength of 550 nm. Rth(550) is obtained from the formula: Rth(550)=(nx-nz)×d when the thickness of the layer (film) is d (nm). In addition, "nx" is the refractive index in the direction where the refractive index in the plane reaches the maximum (that is, the direction of the slow phase axis), and "ny" is the direction in the plane orthogonal to the slow phase axis (that is, the direction of the phase axis) Refractive index, "nz" is the refractive index in the thickness direction. As described above, the thickness of the support is preferably 1 μm to 15 μm, and more preferably 3 μm to 8 μm. The ratio (t2/t1) of the thickness (t2) of the support to the thickness (t1) of the polarizing element is preferably 0.13 to 5.00, more preferably 0.38 to 4.00, and even more preferably 0.63 to 3.33. The compression elastic modulus of the support at 23°C is preferably 0.01 GPa to 8.0 GPa, more preferably 0.02 GPa to 6.0 GPa. Thereby, the cracking of the polarizing element can be suppressed, and the workability and flexibility of the polarizing film can be improved. The support can be formed by any suitable material and method as long as it satisfies the above-mentioned configuration and has sufficient adhesion with the polarizing element. The adhesion of the support to the polarizing element can be evaluated according to the checkerboard peel test of JIS K5400. The adhesiveness of the support to the polarizing element is preferably 0 in the checkerboard peeling test (number of checkerboards: 100). In one embodiment, the support having a pattern structure can be formed by forming a pattern of a resin material or a coating liquid containing the resin material on the surface of the polarizing element, and hardening (or curing) the resin material. In another embodiment, the support can be deposited by SiO on the surface of the polarizing element 2 And other inorganic oxides. As the above resin material, any appropriate material can be used as long as the effect of the present invention can be obtained. Examples of the resin materials include polyester resins, polyether resins, polycarbonate resins, polyurethane resins, polysiloxane resins, polyamide resins, and polyimide resins. Resin, PVA resin, acrylic resin, epoxy resin, fluorine resin. These can be used alone or in combination (for example, mixing, copolymerization). The method of forming the pattern of the resin material or the coating liquid on the surface of the polarizing element is not particularly limited. Examples of the above method include printing, photolithography, inkjet, nozzle, and die coating. The pattern of the resin material or the coating liquid is preferably formed by printing. As a method of printing the coating liquid in a pattern, a letterpress printing method, a direct gravure printing method, a gravure printing method, a lithographic printing method, a stencil printing method, etc. may be mentioned. The coating liquid may contain any appropriate other components within the range that does not impair the effects of the present invention in addition to the above-mentioned resin materials. Examples of such other components include resin components other than the above-mentioned resin materials as main components, tackifiers, inorganic fillers, organic fillers, metal powders, pigments, foils, softeners, anti-aging agents, Conductive agents, ultraviolet absorbers, antioxidants, light stabilizers, surface lubricants, leveling agents, preservatives, heat stabilizers, polymerization inhibitors, lubricants, solvents, catalysts, etc. The conditions for curing (or curing) the above-mentioned resin material (coating liquid) can be appropriately set according to the type of the resin material and the composition of the composition. For example, the resin material can be hardened (or cured) by drying, active energy ray hardening, thermal hardening, or the like. D. Embedding resin layer The embedding resin layer embeds the support formed on one surface of the polarizing element as described above. The thickness of the embedding resin layer is thicker than the thickness of the support, preferably 3 μm to 150 μm, more preferably 5 μm to 100 μm. The embedding resin layer may be any suitable functional layer formed according to the characteristics required by the polarizing film. Examples of the functional layer include a hard coat layer, an adhesive layer, and a transparent optical adhesive layer. When the embedding resin layer is a hard coat layer, the thickness is, for example, 5 μm to 15 μm, and when the embedding resin layer is an adhesive layer, the thickness is, for example, 5 μm to 30 μm, for the embedding resin When the layer is a transparent optical adhesive layer, its thickness is, for example, 25 μm to 125 μm. The embedding resin layer is preferably transparent and substantially optically isotropic. The embedded resin layer can be formed by any appropriate material and method as long as it has sufficient adhesion to the polarizing element and the support. In one embodiment, the embedded resin layer can be formed using a resin material different from the support. The embedding resin layer can be formed by forming a resin layer on the surface of the polarizing element to embed the support and hardening the resin layer. The method of forming the above resin layer on the surface of the polarizing element is not particularly limited. In one embodiment, the resin layer can be formed by applying a coating liquid containing a resin material on the surface of the polarizing element. As the coating method, any appropriate coating method can be used. Specific examples include a curtain coating method, a dip coating method, a spin coating method, a printing coating method, a spray coating method, a slit coating method, a roll coating method, and a swash plate coating method, Blade coating method, gravure coating method, wire bar coating method. The curing conditions can be appropriately set according to the type of resin material used and the composition of the composition. The coating liquid may contain any appropriate other components within the range that does not impair the effects of the present invention in addition to the above-mentioned resin materials. Examples of such other components include resin components other than the above-mentioned resin materials as main components, tackifiers, inorganic fillers, organic fillers, metal powders, pigments, foils, softeners, anti-aging agents, Conductive agents, ultraviolet absorbers, antioxidants, light stabilizers, surface lubricants, leveling agents, preservatives, heat stabilizers, polymerization inhibitors, lubricants, solvents, catalysts, etc. E. The second support is as described above. In the case where the pattern structure of the first support is the same as the pattern structure of the second support, the area of the second support preferably overlaps with the first support in plan view Configure in a smaller way. The structure, functions, etc. of the second support are as described in the description of the support (first support) in item C. F. Other optical films and polarizing films for image display devices can be used in the form of optical laminates in which other optical films such as retardation films are laminated. In addition, the polarizing film and the optical layered body described in the above items A to E can be applied to an image display device such as a liquid crystal display device. Therefore, the present invention includes an image display device using the above polarizing film. An image display device according to an embodiment of the present invention includes the polarizing films described in the above items A to E. [Examples] Hereinafter, the present invention will be described with examples, but the present invention is not limited to the examples shown below. In addition, the parts and% in each case are based on weight. In the following, the room temperature storage conditions without special requirements are 23°C and 65%RH. 1. Production of polarizing element <Production Example 1> Amorphous inter-phthalic acid copolymerized polyethylene terephthalate (IPA copolymerized PET) film (thickness) of 0.75% water absorption rate and Tg of 75°C : 100 μm) One side of the substrate was corona-treated, and the corona-treated surface was coated at 25°C with a ratio of 9:1 containing polyvinyl alcohol (degree of polymerization 4200, degree of saponification 99.2 moles) %) and Acetyl Acetyl Modified PVA (Polymerization degree 1200, Acetyl Acetyl Modification degree 4.6%, Saponification degree 99.0 mol% or more, manufactured by Japan Synthetic Chemical Industry Corporation, trade name "GOHSEFIMER Z200"") The aqueous solution was dried to form a PVA-based resin layer with a thickness of 11 μm to produce a laminate. The obtained laminate was uniaxially stretched in the longitudinal direction (longitudinal direction) at a free end (air-assisted stretching process) to 2.0 times in a 120°C oven between rollers with different peripheral speeds. Next, the laminate was immersed in an insoluble bath (a boric acid aqueous solution obtained by mixing boric acid with 4 parts by weight to 100 parts by weight of water) at a liquid temperature of 30°C for 30 seconds (insoluble treatment). Then, in a dye bath having a liquid temperature of 30° C., the iodine concentration and the immersion time are adjusted while the polarizing plate has a specific transmittance to adjust the immersion. In this production example, an iodine aqueous solution obtained by mixing 0.2 part by weight of iodine with 100 parts by weight of water and 1.0 part by weight of potassium iodide was immersed for 60 seconds (dyeing treatment). Then, it was immersed in a crosslinking bath (a boric acid aqueous solution obtained by mixing potassium iodide 3 parts by weight with 100 parts by weight of water and 3 parts by weight of boric acid) at a liquid temperature of 30°C (crosslinking treatment). After that, the laminate was immersed in a boric acid aqueous solution having a liquid temperature of 70° C. (an aqueous solution obtained by mixing boric acid with 4 parts by weight to 100 parts by weight of water and 5 parts by weight with potassium iodide), and at the same time in the longitudinal direction between rollers with different peripheral speeds (Longitudinal) Uniaxial stretching is performed until the total stretching magnification becomes 5.5 times (underwater stretching treatment). Thereafter, the laminate was immersed in a washing bath (aqueous solution obtained by mixing 4 parts by weight of potassium iodide with 100 parts by weight of water) at a liquid temperature of 30°C (washing treatment). Thus, a polarizing element laminate A containing a polarizing element having a thickness of 5 μm was obtained. <Manufacturing Example 2> A polarizing element laminate B containing a polarizing element having a thickness of 7 μm was produced in the same manner as in Manufacturing Example 1 except that the thickness of the PVA-based resin layer after coating and drying was changed to 15 μm. <Production Example 3> A polyvinyl alcohol film with a thickness of 30 μm and an average degree of polymerization of 2400 and a degree of saponification of 99.9 mol% was immersed in warm water at 30° C. for 60 seconds to swell it. Then, it was immersed in an aqueous solution with a concentration of 0.3% of iodine/potassium iodide (weight ratio = 0.5/8), and the film was dyed while extending 3.5 times. Thereafter, the total elongation ratio was extended to 6 times in a 65°C borate aqueous solution. After stretching, it was dried in an oven at 40°C for 3 minutes to obtain a PVA-based polarizing element C. The thickness of the obtained polarizing element C was 12 μm. 2. Preparation of support forming material <Production Example 4> N-(2-hydroxyethyl)acrylamide is added to 100 parts of acrylic urethane oligomer (manufactured by Nippon Synthetic Chemical Co., Ltd., "violet UV7560B") 20 parts (manufactured by Kohjin, "HEAA"), 3 parts photoinitiator (manufactured by BASF, "IRUGACURE 907"), obtained using methyl isobutyl ketone as a solvent, and can be applied at a specified film thickness The coating agent A which adjusts the solid component concentration by the way. <Production Example 5> N-(2-hydroxyethyl)acrylamide (manufactured by Kohjin, "HEAA") is added to 100 parts of acrylic urethane oligomer (manufactured by Nippon Synthetic Chemical Co., Ltd., "violet UV7000B") ) 20 parts, 3 parts of a photoinitiator (made by BASF, "IRUGACURE 907"), using methyl isobutyl ketone as a solvent, to obtain a solid matter component whose concentration can be adjusted so that it can be applied at a specified film thickness Paint B. <Production Example 6> N-(2-hydroxyethyl)acrylamide (manufactured by Kohjin, "HEAA") is added to 100 parts of acrylic urethane oligomer (manufactured by Nippon Synthetic Chemical Co., Ltd., "violet UV3520TL") ) 20 parts, 3 parts of a photoinitiator (made by BASF, "IRUGACURE 907"), using methyl isobutyl ketone as a solvent, to obtain a solid matter component whose concentration can be adjusted so that it can be applied at a specified film thickness Paint C. <Production Example 7> N-(2-hydroxyethyl)acrylamide (manufactured by Kohjin Corporation, "HEAA") is added to 100 parts of acrylic urethane oligomer (manufactured by Nippon Synthetic Chemical Co., Ltd., "violet UV6640B") ) 20 parts, 3 parts of a photoinitiator (made by BASF, "IRUGACURE 907"), using methyl isobutyl ketone as a solvent, to obtain a solid matter component whose concentration can be adjusted so that it can be applied at a specified film thickness Paint D. <Production Example 8> Using UV-curable screen ink (manufactured by Imperial Ink Co., Ltd., "UV FIL Screen Ink 611 White" (solid content 76%)), diluent solvent (Imperial Ink Co., Ltd. limited Made by the company, "RE-806 reducer" and obtained coating agent E that can adjust the solid content concentration so that it can be applied with a specified film thickness. <Production Example 9> Para-acrylate urethane oligomer (Japan 100 parts of N-(2-hydroxyethyl) acrylamide (manufactured by Kohjin Co., Ltd., "HEAA"), 100 parts of photoinitiator (manufactured by BASF Co., Ltd., "IRUGACURE 907" ) 3 parts, using methyl isobutyl ketone as a solvent, to obtain a coating agent F whose solid content concentration can be adjusted so as to be applied at a specified film thickness. <Example 1> After curing the above coating agent A The surface of the polarizer layer A of the polarizer element A is coated in a honeycomb shape with a thickness of 7 μm, and dried at 60° C. for 120 seconds. Furthermore, the coating agent is used Precision desktop printing machine (manufactured by NEWLONG Precision Industry Co., Ltd., "DP-320 type") and screens formed into a honeycomb pattern (mesh size #500, wire diameter 18 μm, thickness 38 μm, emulsion thickness 10 μm). Afterwards, the cumulative light volume was 500 mJ/cm by irradiation with a high-pressure mercury lamp 2 The ultraviolet ray hardens the coating agent to form a support body (first support body) of a honeycomb structure (line width: 1.0 mm, length of one side of a regular hexagon: 4.0 mm). Then, a surface protective film (manufactured by Nitto Denko Corporation, "RP301") was bonded to the support, and the non-crystalline PET substrate of the polarizing element laminate A was peeled off. Thereafter, by peeling off the surface protective film, the polarizing film 1 having the polarizing element and the first support is produced. <Example 2> The polarizing film 2 was produced like Example 1 except having used the coating agent B as a coating agent. <Example 3> The polarizing film 3 was produced like Example 1 except having used the coating agent C as a coating agent. <Example 4> The polarizing film 4 was produced like Example 1 except having used the coating agent D as a coating agent. <Example 5> The polarizing film 5 was produced like Example 1 except having used the coating agent E as a coating agent. <Example 6> The coating agent E was applied in a honeycomb shape on the surface of the polarizing element layered body A on the polarizing element side so that the thickness after curing became 7 μm, and the coating was applied under the conditions of 60° C. and 120 seconds. Its dry. In addition, the coating agent is applied using a precision desktop printer (NEWLONG Precision Industry Co., Ltd., "DP-320 type") and a screen pattern formed into a honeycomb pattern (mesh size #500, wire diameter 18) μm, thickness 38 μm, emulsion thickness 10 μm). Afterwards, the cumulative light volume was 500 mJ/cm by irradiating with a high-pressure mercury lamp 2 The ultraviolet ray hardens the coating agent to form a support body (first support body) of a honeycomb structure (line width: 1.0 mm, length of one side of a regular hexagon: 4.0 mm). Then, a surface protective film (manufactured by Nitto Denko Corporation, "RP301") was bonded to the support, and the non-crystalline PET substrate of the polarizing element laminate A was peeled off. Then, using the above-mentioned coating agent E, a honeycomb structure was formed on the surface of the polarizing element opposite to the surface on which the first support was formed, in the same manner as the first support, in a plan view overlapping the first support Width: 1.0 mm, the length of one side of the regular hexagon: 4.0 mm) the second support. Thereafter, by peeling off the surface protective film, a polarizing film 6 having a polarizing element and first and second supports is produced. <Example 7> A polarizing film 7 was produced in the same manner as in Example 6, except that the thickness of the first and second supports was 3 μm. <Example 8> A polarizing film 8 was produced in the same manner as in Example 6, except that the thickness of the first and second supports was 5 μm. <Example 9> A polarizing film 9 was produced in the same manner as in Example 6, except that the thickness of the first and second supports was 14 μm. <Example 10> In a plan view, the apex of the regular hexagon of the second support and the center of the regular hexagon of the first support overlap (the way in which the positions of the first support and the second support are shifted from each other in plan view) ) A polarizing film 10 was produced in the same manner as in Example 6 except that the second support was formed. <Example 11> A polarizing film 11 and a polarizing film 11 with an adhesive layer were produced in the same manner as in Example 10 except that the polarizing element laminate B was used as the polarizing element laminate. <Example 12> On one surface of the polarizing element C, the coating agent E was applied in a honeycomb shape so that the thickness after curing became 7 μm, and dried at 60° C. for 120 seconds. In addition, the coating agent is applied using a precision desktop printer (NEWLONG Precision Industry Co., Ltd., "DP-320 type") and a screen pattern formed into a honeycomb pattern (mesh size #500, wire diameter 18) μm, thickness 38 μm, emulsion thickness 10 μm). Afterwards, the cumulative light volume was 500 mJ/cm by irradiating with a high-pressure mercury lamp 2 The ultraviolet ray hardens the coating agent to form a support (first support) of a honeycomb structure (line width: 1.0 mm, length of one side of regular hexagon: 4.0 mm). Then, a surface protective film ("RP301" manufactured by Nitto Denko Corporation) was bonded to the support. Then, using the above-mentioned coating agent E, on the surface of the polarizing element C opposite to the surface on which the first support is formed, the top point of the regular hexagon of the second support and the regular hexagon of the first support are viewed from above The way in which the centers overlap (the way in which the positions of the first support and the second support are shifted from each other when viewed from above) forms a honeycomb structure (line width: 1.0 mm, the length of one side of the regular hexagon) in the same way as the first support 4.0 mm) second support. Thereafter, by peeling the surface protective film, the polarizing film 12 having the polarizing element and the first and second supports is produced. <Example 13> A polarizing film 13 was produced in the same manner as in Example 10 except that the line width of the honeycomb structure of the first and second supports was 1.8 mm. <Example 14> A polarized light was produced in the same manner as in Example 10 except that the line width of the honeycomb structure of the first and second supports was 0.8 mm and the length of one side of the regular hexagon was 3.0 mm.膜14. The membrane 14. <Example 15> Polarized light was produced in the same manner as in Example 10 except that the line width of the honeycomb structure of the first and second supports was 0.5 mm, and the length of one side of the regular hexagon was set to 2.0 mm.膜15. Film 15. <Example 16> A polarized light was produced in the same manner as in Example 10 except that the line width of the honeycomb structure of the first and second supports was 1.5 mm, and the length of one side of the regular hexagon was set to 2 mm.膜16。 16 film. <Example 17> A stencil patterned screen (mesh size #500, wire diameter 18 μm, thickness 38 μm, emulsion thickness 10 μm) was applied to support the first and second The body is made into a truss structure (line width: 0.6 mm, the length of one side of the triangle is 4.0 mm), and the top of the triangle of the second support and the center of the triangle of the first support are overlapped in a plan view (viewed from below The polarizing film 17 was produced in the same manner as in Example 10 except that the positions of the first support and the second support were shifted from each other) except that the second support was formed. <Example 18> A polarizing film 18 was produced in the same manner as in Example 17 except that the line width of the truss structure of the first and second supports was 0.5 mm and the length of one side of the triangle was 5.5 mm. . <Example 19> Using a screen formed into a frame-like pattern (mesh size #500, wire diameter 18 μm, thickness 38 μm, emulsion thickness 10 μm), the first and second The support is made into a frame structure (line width: 1.0 mm, the length of one side of the square: 4.0 mm), and the top of the square of the second support overlaps with the center of the square of the first support in a plan view (view from above The polarizing film 19 was produced in the same manner as in Example 10, except that the positions of the lower first support and the second support were shifted from each other) except that the second support was formed. <Example 20> A polarizing film 20 was produced in the same manner as in Example 19 except that the line width of the frame structure of the first and second supports was 1.3 mm and the length of one side of the triangle was 3.0 mm. . <Example 21> Using a screen formed into a stripe pattern (mesh size #500, wire diameter 18 μm, thickness 38 μm, emulsion thickness 10 μm), the first and second The support is made into a stripe structure (line width: 1.0 mm, stripe interval: 4.0 mm) extending in a direction orthogonal to the absorption axis of the polarizing element, and the second structure is formed to overlap the first support in a plan view Except for the support, the polarizing film 21 was produced in the same manner as in Example 6. <Example 22> A polarizing film 22 was produced in the same manner as in Example 1, except that the coating agent F was used as the coating agent and the thickness of the support was 5 μm. <Comparative Example 1> A surface protective film (manufactured by Nitto Denko Corporation, "RP301") was bonded to the surface of the polarizing element laminate A on the polarizing element side, and the polarizing element laminate A of the non-crystalline PET base Material peeling. Thereafter, the surface protective film is peeled off, thereby producing a polarizing film 23 including a polarizing element. <Comparative Example 2> A polarizing film 24 was produced in the same manner as in Example 21 except that the first and second supports were formed in a stripe structure extending in a direction parallel to the absorption axis of the polarizing element. <Comparative Example 3> The polarizing element C was used as the polarizing film 25. <Comparative Example 4> 40 parts by weight of N-hydroxyethylacrylamide (HEAA), 60 parts by weight of acrylomorpholine (ACMO), and 3 parts by weight of a photoinitiator (manufactured by BASF, "IRGACURE 819") It is mixed to prepare an ultraviolet curing adhesive. On the surface of the polarizing element layered body A of the polarizing element side, apply the adhesive agent so that the thickness after curing becomes 1 μm, and attach it to the (meth)acrylic resin film having a lactone ring structure. Next, a corona-treated protective film (thickness: 40 μm) was applied to the treated surface, and then the ultraviolet ray was irradiated as an active energy ray to harden the adhesive. In addition, for the ultraviolet irradiation, a metal halide lamp (Fusion UV Systems, Inc., encapsulated with gallium), product name "Light HAMMER10", bulb: V-shaped bulb, peak illumination: 1600 mW/cm 2 , The cumulative exposure is 1000/mJ/cm 2 (The wavelength is 380~440 nm). The illuminance of ultraviolet rays was measured using a spectrophotometer (manufactured by Solatell Corporation, product name "Sola-Check system"). Next, the non-crystalline PET base material of the polarizing element laminate A was peeled off to produce a polarizing film 26 having a polarizing element and a protective film. <Comparative Example 5> A protective film (thickness: 20 μm) obtained by corona-treating the easy-to-treat surface of the (meth)acrylic resin film having a lactone ring structure was used as the protective film. Example 4 A polarizing film 27 was produced in the same manner. (Evaluation) The polarizing films 1 to 27 were subjected to the following adhesion test, torsion test, and U-shaped expansion and contraction test. Table 1 shows the evaluation results. <Adhesion Test> The adhesion of the first support to the polarizing element was measured in accordance with the checkerboard peel test (number of checkerboards: 100) of JIS K5400, and evaluated based on the following criteria. ○: The peeling number of the first support is 0. ×: The number of peeling of the first support is one or more. <Torsion Test> A flat body unloaded torsion test machine (product name: main body TCDM111LH) and a jig (flat body unloaded torsion test jig) manufactured by YUASA SYSTEM MACHINE CO., LTD. were used. The torsion test is shown in Figure 9. The polarizing film was cut into a size of 120 mm (absorption axis direction) × 80 mm (transmission axis direction) as a test sample. After the two short sides of the above-mentioned sample were clamped and fixed by the torsion clips 18 and 19 of the above-mentioned testing machine, when one short side was fixed by the clip 19, the clip 18 on the other short side was twisted under the following conditions. Twisting speed: 10 rpm Twisting angle: 45 degrees Twisting times: 100 times The state of the sample after the torsion test was evaluated by visual inspection and based on the following criteria. In addition, when there is a sample that cannot be measured due to deformation or curling of the sample, the sample is determined to be unmeasured. ○: Cracking and light leakage did not occur. No creases remain. △: Cracking and light leakage did not occur. But creases remain. ×: Cracking and light leakage occurred. And creases remain. <U-shaped expansion and contraction test> A flat body unloaded U-shaped expansion and contraction tester (product name: main body DLDM111LH) and a jig (plane-shaped body and unloaded U-shaped expansion and contraction test fixture) manufactured by YUASA SYSTEM MACHINE CO., LTD. The U-shaped expansion and contraction test is shown in Fig. 10. The polarizing film was cut into a size of 100 mm (absorption axis direction) × 50 mm (transmission axis direction) as a test sample. After fixing both ends of the sample to the clamping parts 21 and 22 of the testing machine with double-sided tape (not shown), the single side (first side) of the sample was turned inward under the following conditions A U-shaped expansion and contraction is formed to bend the above sample. Regarding U-shaped expansion and contraction, the bending R (bending radius) was set to 3 mm, and the sample was bent into a folded state from a flat state. The above-mentioned bending is to contact the two ends x, y by the action of the jig, and the other parts of the sample are inserted between the two plate portions from both outer sides without load by using the plate portions 23, 24 provided separately. In addition, the above-mentioned bending by expansion and contraction is performed on the other surface side (second surface) of the rectangular object in the same manner as above, and is formed into a U-shape inward and outward. Expansion speed: 30 rpm Bending R: 3 mm Number of expansion and contraction: 100 times The state of the sample in the U-shaped expansion and contraction test was evaluated by visual inspection based on the following criteria. In addition, when there is a sample that cannot be measured due to deformation or curling of the sample, the sample is determined to be unmeasured. ○: Cracking and light leakage did not occur. No creases remain. ×: Cracking or light leakage occurred. Or confirm the crease. <Compression Elastic Modulus of Support> The compression elastic modulus of the support at 23°C is measured in the following order. The coating agent A was applied to the surface of the polarizing element layered body A of the polarizing element layer A so that the thickness after curing became 5 μm, and dried at 60° C. for 120 seconds to prepare the polarizing element layer. On the body A, a sample A containing a layer of the hardened material of the coating agent A was formed. Similarly, samples B to F were prepared using paints B to F. Using the samples A to F prepared above, the compression elastic modulus was measured by the following method, and the value of the compression elastic modulus obtained by the measurement was used as the compression elastic modulus of the supports A to F at 23°C. The TI900 TriboIndenter (manufactured by Hysitron) was used for the measurement of the compression elastic modulus. The sample obtained above was cut into a size of 10 mm×10 mm, fixed on a support with TriboIndenter, and the compression elastic modulus was measured by the nanoindentation method. At this time, the position is adjusted so that the indenter used is pressed into the vicinity of the center of the hardened product. The measurement conditions are as follows. Indenter used: Berkovich (triangular cone) Measurement method: Single indentation measurement Temperature: 23°C Inset depth setting: 100 nm The compressive elastic modulus of the supports A to F at 23°C is as follows. Support A (coating agent A): 2.57 GPa Support B (coating agent B): 0.84Gpa Support C (coating agent C): 0.07 GPa Support D (coating agent D): 0.42 GPa Support E (coating agent) E): 0.02 GPa Support F (coating agent F): 5.38 GPa [Table 1]
Figure 107104486-A0304-0001
It is clear from Table 1 that the polarizing films of Comparative Examples 1 to 3 have low operability (self-supporting property), to the extent that the torsion test and the U-shaped expansion and contraction test cannot be measured. In addition, the polarizing films of Comparative Examples 4 and 5 cracked and leaked light, and left creases. On the other hand, the polarizing films of Examples 1 to 22 were found to be good results in any of the adhesion test, torsion test, and U-shaped expansion and contraction test. [Industrial Applicability] The polarizing film of the present invention is suitable for image display devices such as liquid crystal display devices and organic EL display devices.

1‧‧‧偏光元件2‧‧‧支持體(第1支持體)3‧‧‧支持體(第2支持體)4‧‧‧包埋樹脂層10‧‧‧偏光膜11‧‧‧偏光膜12‧‧‧偏光膜18‧‧‧夾子19‧‧‧夾子21‧‧‧支持部22‧‧‧支持部23‧‧‧板部24‧‧‧板部1‧‧‧Polarizing element 2‧‧‧Support (first support) 3‧‧‧Support (second support) 4‧‧‧Embedded resin layer 10 Polarized film 11‧‧‧ Polarized film 12‧‧‧Polarizing film 18‧‧‧Clamp 19‧‧‧Clamp 21‧‧‧Support section 22‧‧‧Support section 23‧‧‧ Plate section 24‧‧‧ Plate section

圖1係本發明之一實施形態之偏光膜的俯視圖。 圖2係本發明之一實施形態之偏光膜的剖視圖。 圖3係本發明之另一實施形態之偏光膜的俯視圖。 圖4係本發明之又一實施形態之偏光膜的俯視圖。 圖5係本發明之又一實施形態之偏光膜的俯視圖。 圖6係本發明之又一實施形態之偏光膜的俯視圖。 圖7係本發明之又一實施形態之偏光膜的剖視圖。 圖8係本發明之又一實施形態之偏光膜的剖視圖。 圖9係用於說明扭轉試驗之概略圖。 圖10係用以說明U次伸縮試驗之概略圖。FIG. 1 is a plan view of a polarizing film according to an embodiment of the present invention. 2 is a cross-sectional view of a polarizing film according to an embodiment of the present invention. 3 is a plan view of a polarizing film according to another embodiment of the present invention. 4 is a plan view of a polarizing film according to still another embodiment of the present invention. 5 is a plan view of a polarizing film according to still another embodiment of the present invention. 6 is a plan view of a polarizing film according to still another embodiment of the present invention. 7 is a cross-sectional view of a polarizing film according to still another embodiment of the present invention. 8 is a cross-sectional view of a polarizing film according to still another embodiment of the present invention. Fig. 9 is a schematic diagram for explaining a torsion test. FIG. 10 is a schematic diagram for explaining the U-times telescopic test.

1‧‧‧偏光元件 1‧‧‧ Polarizing element

2‧‧‧支持體(第1支持體) 2‧‧‧Support (1st support)

10‧‧‧偏光膜 10‧‧‧ Polarizing film

Claims (9)

一種偏光膜,其具備偏光元件與形成於上述偏光元件之至少一個面上之支持體,上述支持體具有圖案結構,上述偏光元件係由含有碘之聚乙烯醇系樹脂膜所構成,上述支持體於光學上具有等向性,上述支持體係以上述偏光元件之表面之一部分露出之方式而形成。 A polarizing film comprising a polarizing element and a support formed on at least one surface of the polarizing element, the support has a pattern structure, the polarizing element is composed of a polyvinyl alcohol-based resin film containing iodine, and the support Optically isotropic, the support system is formed in such a way that part of the surface of the polarizing element is exposed. 如請求項1之偏光膜,其中上述偏光元件之厚度為15μm以下。 The polarizing film according to claim 1, wherein the thickness of the polarizing element is 15 μm or less. 如請求項1或2之偏光膜,其中上述支持體具有選自由蜂窩結構、桁架結構、框架結構、條狀結構、及圓結構所組成之群中之至少任一種結構。 The polarizing film according to claim 1 or 2, wherein the support has at least any one structure selected from the group consisting of a honeycomb structure, a truss structure, a frame structure, a strip structure, and a round structure. 如請求項1或2之偏光膜,其中上述支持體之厚度為1μm~15μm。 The polarizing film according to claim 1 or 2, wherein the thickness of the support is 1 μm to 15 μm. 如請求項1或2之偏光膜,其中俯視下之上述支持體之線寬為500μm~3000μm。 The polarizing film according to claim 1 or 2, wherein the line width of the above-mentioned support in plan view is 500 μm to 3000 μm. 如請求項1或2之偏光膜,其中於上述偏光元件之上述一個面上具備將上述支持體包埋之包埋樹脂層。 The polarizing film according to claim 1 or 2, wherein an embedding resin layer for embedding the support is provided on the one surface of the polarizing element. 如請求項1或2之偏光膜,其中上述支持體於23℃下之壓縮彈性模數為0.01GPa~8.0GPa。 The polarizing film according to claim 1 or 2, wherein the compressive elastic modulus of the above support at 23°C is 0.01 GPa to 8.0 GPa. 一種圖像顯示裝置,其具備如請求項1至7中任一項之偏光膜。 An image display device provided with the polarizing film according to any one of claims 1 to 7. 一種偏光膜之製造方法,其包括如下步驟:於偏光元件之至少一個面上形成樹脂材料之圖案的步驟;與藉由使上述樹脂材料硬化而形成具有圖案結構之支持體的步驟;且上述偏光元件係由含有碘之聚乙烯醇系樹脂膜所構成,上述支持體於光學上具有等向性,上述支持體係以上述偏光元件之表面之一部分露出之方式而形成。A method of manufacturing a polarizing film, comprising the steps of: forming a pattern of a resin material on at least one surface of a polarizing element; and forming a support having a pattern structure by hardening the resin material; and the above polarized light The element is composed of a polyvinyl alcohol resin film containing iodine, the support is optically isotropic, and the support system is formed such that a part of the surface of the polarizing element is exposed.
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