201248218 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種作為構成液晶顯示裝置之光學零件之 一而有用之偏光板之製造方法。 【先前技術】 近年來’消耗電力較小，以低電壓運作，輕量且薄型之 液晶顯示裝置作為行動電話、個人數位助理、電腦用之監 視器、及電視等資訊用顯示裝置而迅速普及。 作為構成液晶顯示裝置之光學零件之一而有用之偏光板 具有於包含吸附配向有二色性色素之聚乙烯醇系樹脂的偏 光膜之至少一面、通常於兩面貼合有透明樹脂膜之構成， 並且經由黏著劑層貼著於液晶單元上而用作液晶面板。貼 合於偏光膜之一面上之透明樹脂膜係具有保護包含聚乙烯 醇系樹脂之偏光膜之所謂保護膜之功能者，但於將透明樹 月曰籐貼合於偏光膜之兩面上之情形時，另一透明樹脂膜除 了單純之保護膜之功能以外，亦較多具有以液晶單元之光 予補償或液晶顯示裝置之視角改良為目的之所謂光學補償 膜之功能。 士偏光膜與透明樹脂膜之貼合先前一直使用以聚乙烯醇系 樹月θ為主成分之水溶液作為接著劑’但該水溶液系之接著 劑可適用之樹脂膜有限，又，為了進行乾燥、硬化需要相 應之時間。並且’近年來’要求將多種多樣之透明樹脂膜 +為保°蔓臈’又’作為光學補償膜而貼合於偏光膜上。因 此揭不有使用紫外線硬化型接著劑，其原因在於紫外線 16328l.doc 201248218 硬化型接著劑具有可應用於各種透明樹脂膜、硬化時間較 短、不將有害物質擴散至大氣中等優點。例如jP2〇〇4_ 24 5 925-A中揭示有如下技術：使用包含以不含芳香環之環 氧化合物為主成分之組合物的接著劑將透明樹脂膜（同文 獻中稱為「保護膜」）重疊於偏光膜上，在此照射以紫外 線為代表例之活性能量線使接著劑硬化，而製成偏光板。 但是’如此使用紫外線硬化型接著劑並在此照射紫外線 而製造之偏光板存在如下問題：因自紫外線照射裝置產生 之熱，而於照射紫外線之透明樹脂膜面上產生稱為「熱不 均j之微小變形，而有損偏光板之外觀。關於此種熱不 均’例如使煢光燈之光於偏光板之表面反射時，若為無熱 不均之偏光板上，則螢光燈之像如實映出，相對於此，若 為產生熱不均之偏光板，則會以許多細小白點之形式觀察 到該不均（凹凸）。若將產生熱不均之偏光板應用於液晶顯 示裝置’則顯示之影像亦產生相同之白點。因此，期待製 造出不產生熱不均之偏光板。 JP2009-134190-A中揭示有一種偏光板之製造方法，其 係將偏光膜及透明樹脂膜分別以長條狀連續地搬送，經由 接著劑將透明樹脂膜貼合於該偏光膜上後，一面使所獲得 之積層體沿其搬送方向密接於形成為圓弧狀之凸曲面、典 型而s為輥上’一面使接著劑聚合硬化。並且，作為代表 性之接著劑，可列舉紫外線硬化型接著劑，其段落〇〇21中 記載有使上述輥作為表面溫度設定為2〇〜25〇c之冷卻輥而 發揮作用。若採用如此一面密接於冷卻輕上一面照射紫外 163281.doc 201248218 線之方法，則期待亦可抑制容易產生於使用紫外線硬化型 接著μ之偏光板上的上述熱不均。然而，即便採用密接於 冷部輥上之方法，根據紫外線之照射強度或偏光板之搬送 速度’依然存在產生熱不均之情形。 因此，本發明之課題在於開發並提供一種偏光板之製造 方法，其係經由紫外線硬化型接著劑將透明樹脂膜貼合於 偏光膜上，並在此照射紫外線而使紫外線硬化型接著劑硬 化的方法，並且難以於偏光板上產生熱不均。 本發明者等人為了解決該課題而反覆努力研究，結果發 現：將對經由紫外線硬化型接著劑於偏光膜上貼合透明樹 月S臈而成之積層體所照射之紫外線設為實質上僅包含4〇〇 nm以下之波長者較為有效，從而完成本發明。 【發明内容】 即，本發明包含下述内容。 Π] —種偏光板之製造方法，其包括經由紫外線硬化型接 著劑將透明樹脂膜貼合於包含聚乙烯醇系樹脂之偏光膜 上’並在此照射紫外線使上述接著劑硬化，並且上述接著 劑·<•硬化係藉由照射實質上僅包含4〇〇 nm以下之波長之紫 外線而進行。 U]如[1]之方法，其中實質上僅包含400 nm以下之波長之 紫外線係使自紫外線照射裝置發出之光通過可截止4〇〇 nm 以上之波長之光的波長濾波器而獲得之實質上遮斷4〇〇 nm 以上之波長之光的紫外線。 [3]如[1 ]或[2]之方法，其中經由上述紫外線硬化型接著 I6328J.doc 201248218 劑將透明樹脂膜分別貼合於偏光膜之兩面，並自一方之透 明樹脂膜側進行上述紫外線之照射。 [4] 如[1]至[3]中任一項之方法，其中將長條狀之偏光膜 及長條狀之透明樹脂膜分別連續地搬送，經由上述紫外線 硬化型接著劑將上述透明樹脂膜貼合於該偏光膜上，使所 獲付之積層體捲繞至具有與其搬送方向正交之轴的親之外 周面並密接，自所獲得之積層體之與上述輥成相反側之側 進行上述紫外線之照射。 [5] 如[4]之方法’其中將長條狀之偏光膜及2條長條狀之 透明樹脂膜分別連續地搬送，經由上述紫外線硬化型接著 劑將上述透明樹脂膜分別貼合於偏光膜之兩面，使所獲得 之積層體捲繞至上述報之外周面並密接，自上述積層體之 與上述輥成相反側之透明樹脂膜側進行上述紫外線之照 射。 根據本發明，可一面採用使用紫外線硬化型接著劑並在 此照射紫外線使其硬化，使偏光膜與透明樹脂膜密接之方 法’一面製造抑制熱不均之產生之偏光板。 【實施方式】 參照圖1，於本發明中，經由紫外線硬化型接著劑將透 明樹脂膜2、3貼合於偏光膜丨上而製成積層體4，對該積層 體4照射自紫外線照射裝置16發出之紫外線使上述接著劑 硬化，而製造偏光板5。 偏光膜1與透明樹脂膜2、3之貼合係使用貼合用夾輥 21、22。透明樹脂膜2、3可貼合於偏光膜1之一面，亦可 163281.doc 201248218[Technical Field] The present invention relates to a method of manufacturing a polarizing plate which is useful as one of optical components constituting a liquid crystal display device. [Prior Art] In recent years, a liquid crystal display device which is low in power consumption and operates at a low voltage, and which is lightweight and thin, has been rapidly spread as a display device for information such as a mobile phone, a personal digital assistant, a monitor for a computer, and a television. The polarizing plate which is useful as one of the optical components constituting the liquid crystal display device has a configuration in which at least one surface of the polarizing film which adsorbs the polyvinyl alcohol-based resin having the dichroic dye is adsorbed, and a transparent resin film is usually bonded to both surfaces. And it adheres to a liquid crystal cell via an adhesive layer, and is used as a liquid crystal panel. The transparent resin film which is bonded to one surface of the polarizing film has a function of protecting a so-called protective film containing a polarizing film of a polyvinyl alcohol-based resin, but the transparent tree is attached to both sides of the polarizing film. In addition to the function of a simple protective film, the other transparent resin film also has a function of a so-called optical compensation film for the purpose of compensating for the light of the liquid crystal cell or improving the viewing angle of the liquid crystal display device. For the bonding of a polarizing film and a transparent resin film, an aqueous solution containing a polyvinyl alcohol-based tree θ as a main component has been used as an adhesive agent. However, a resin film to which the aqueous solution-based adhesive is applicable is limited, and, for drying, Hardening requires a corresponding amount of time. Further, in recent years, a variety of transparent resin films have been required to be bonded to a polarizing film as an optical compensation film. Therefore, the ultraviolet curable adhesive is not used because the ultraviolet ray 16328l.doc 201248218 hardening type adhesive has the advantages that it can be applied to various transparent resin films, the curing time is short, and harmful substances are not diffused to the atmosphere. For example, jP2〇〇4_24 5 925-A discloses a technique in which a transparent resin film (referred to as "protective film" in the literature) is used as an adhesive comprising a composition containing an epoxy compound containing no aromatic ring as a main component. It is superposed on the polarizing film, and the active energy ray represented by ultraviolet rays is irradiated to harden the adhesive to form a polarizing plate. However, the polarizing plate produced by irradiating ultraviolet rays with the ultraviolet curable adhesive as described above has a problem in that heat generated by the ultraviolet irradiation device is generated on the surface of the transparent resin film which is irradiated with ultraviolet rays, and is called "heat unevenness". The slight deformation causes the appearance of the polarizing plate to be detrimental. Regarding such heat unevenness, for example, when the light of the neon lamp is reflected on the surface of the polarizing plate, if it is a polarizing plate having no heat unevenness, the fluorescent lamp is In contrast, in the case of a polarizing plate that generates heat unevenness, the unevenness (concavity and convexity) is observed in the form of a plurality of fine white spots. If a polarizing plate that generates heat unevenness is applied to a liquid crystal display The image displayed by the device also produces the same white point. Therefore, it is expected to produce a polarizing plate which does not cause thermal unevenness. JP2009-134190-A discloses a method for manufacturing a polarizing plate which is a polarizing film and a transparent resin. Each of the films is continuously conveyed in a long strip shape, and the transparent resin film is bonded to the polarizing film via an adhesive, and then the obtained laminated body is adhered to the arc-shaped convex shape in the conveying direction thereof. The surface is typically s-on the roll. The adhesive is polymerized and cured. A typical example of the adhesive is an ultraviolet curable adhesive, and the paragraph 〇〇 21 describes that the roll is set to a surface temperature of 2冷却~25〇c is used as a cooling roller. If the method of irradiating the UV 163281.doc 201248218 line in close contact with the cooling light is used, it is expected that it can be easily suppressed on the polarizing plate using the ultraviolet curing type followed by μ. However, even if the method of adhering to the cold roll is used, there is still a case where heat unevenness occurs depending on the irradiation intensity of the ultraviolet light or the transport speed of the polarizing plate. Therefore, the object of the present invention is to develop and provide A method for producing a polarizing plate, which is a method in which a transparent resin film is bonded to a polarizing film via an ultraviolet curable adhesive, and ultraviolet rays are irradiated thereto to cure the ultraviolet curable adhesive, and it is difficult to generate heat on the polarizing plate. The inventors of the present invention have repeatedly tried hard to solve this problem, and found that they will pass ultraviolet rays. The ultraviolet ray irradiated by the laminated body obtained by laminating the transparent slab S 臈 on the polarizing film is effective to substantially only include a wavelength of 4 〇〇 nm or less, and the present invention has been completed. In other words, the present invention includes the following: A method for producing a polarizing plate comprising: bonding a transparent resin film to a polarizing film comprising a polyvinyl alcohol resin via an ultraviolet curing type adhesive; and irradiating ultraviolet rays there The adhesive is cured, and the above-mentioned adhesive agent is cured by irradiating ultraviolet rays having substantially only a wavelength of 4 nm or less. U] The method of [1], wherein substantially only 400 is contained. Ultraviolet light having a wavelength of nm or less is an ultraviolet ray obtained by passing a light emitted from an ultraviolet ray irradiation device through a wavelength filter capable of cutting off light having a wavelength of 4 〇〇 nm or more and substantially blocking light having a wavelength of 4 〇〇 nm or more. [3] The method according to [1] or [2], wherein the transparent resin film is attached to both sides of the polarizing film via the ultraviolet curing type and then the I6328J.doc 201248218 agent, and the ultraviolet rays are applied from the side of the transparent resin film. Irradiation. [4] The method according to any one of [1] to [3] wherein the long polarizing film and the long transparent resin film are continuously conveyed, and the transparent resin is passed through the ultraviolet curing adhesive. The film is bonded to the polarizing film, and the obtained laminated body is wound up to the outer peripheral surface of the outer surface having the axis orthogonal to the conveying direction, and is adhered to the side opposite to the roller from the obtained laminated body. The above ultraviolet rays are irradiated. [5] The method according to [4], wherein the long polarizing film and the two long transparent resin films are continuously conveyed, and the transparent resin film is bonded to the polarized light via the ultraviolet curable adhesive. On both sides of the film, the obtained laminated body was wound around the outer peripheral surface of the above-mentioned newspaper and adhered to each other, and the ultraviolet ray was irradiated from the side of the transparent resin film of the laminated body opposite to the above-mentioned roll. According to the present invention, a polarizing plate which suppresses the occurrence of thermal unevenness can be produced by a method in which an ultraviolet curable adhesive is used and the ultraviolet light is irradiated and cured, and the polarizing film is adhered to the transparent resin film. [Embodiment] Referring to Fig. 1, in the present invention, a transparent resin film 2, 3 is bonded to a polarizing film by an ultraviolet curing type adhesive to form a laminated body 4, and the laminated body 4 is irradiated with an ultraviolet irradiation device. The ultraviolet rays emitted from 16 harden the above-mentioned adhesive to produce a polarizing plate 5. The bonding of the polarizing film 1 and the transparent resin films 2 and 3 uses the bonding nip rolls 21 and 22. The transparent resin films 2, 3 can be attached to one side of the polarizing film 1, or can be 163281.doc 201248218
貼合於偏光膜1之兩面，作鲂杜先二間-, A 較佳為如圖不般，貼合於偏光 膜1之兩面。於圖示之例Φ，日卜人从 1 ^ 貼合後之積層體4沿其搬送方 向密接於具有凸曲面之接觸體23上，夾持積層體4自配置 於其相反狀料線照射裝置16照射紫H接觸體23較 佳為如圖^㈣構成1製造之偏光板5係經由搬送用 導輥24及捲取前夾輥25、26而捲取至製品輥3〇上。於偏光 膜1之面、或第一透明樹脂膜2及第二透明樹脂膜3之各 自未塗佈接著劑之面上適宜設置搬送用之導輥28、28。圓 中之直線H頭表示敎行進方向，曲㈣頭表純之旋轉 方向。 並且，照射至積層體4上之紫外線係實質上僅包含4〇〇 nm以下之波長者。於圖示之例中係以如下方式構成：於紫 外線照射裝置16之發出光之側，於紫外線照射裝置16與積 層體4之間配置可截止4〇〇 nm以上之波長之光的波長濾波 器18，自紫外線照射裝置16發出之光通過該波長濾波器18 而實質上遮斷400 nm以上之波長之光，事實上僅包含4〇〇 nm以下之波長之紫外線照射至積層體4上β 於紫外線照射裝置16中，如下所述，使用水銀燈或金屬 鹵素燈等作為光源，上述一般紫外線光源雖然多包含波長 400 nm以下之紫外線，但其波長區域自紫外線區域至可見 光區域較廣地分佈，因此將此光源點亮時呈現白色或者紫 色。於使用此種通常之紫外線光源之情形時，如圖示般通 過波長濾波器18而實質上遮斷400 nm以上之波長之光。另 一方面’例如亦有如準分子雷射光源般實質上僅發出波長 163281.doc 201248218 400 nm以下之紫外線的光源，因此亦可使用此種光源。但 疋，此種實質上僅發出波長4〇〇 nm以下之紫外線的光源一 般價格昂貴，因此實用上採用如下形態：使用亦產生可見 光之紫外線光源，如圖示般通過波長濾波器丨8，實質上遮 斷400 nm以上之波長之光之形態。 本發明之製造方法當然亦可應用如下方式：使用剪裁為 單片之偏光膜及透明樹脂膜，經由紫外線硬化型接著劑貼 合該等，並在此照射紫外線使上述接著劑硬化，而製造偏 光板之單片形式，尤其於工性生產上，如圖丨所示適用 於連續地生產之方式《又，紫外線照射方式並不限定於如 圖不之以密接於較佳為由輥構成之接觸體23之狀態下進行 照射之形態，例如於與積層體4之紫外線照射裝置丨6相反 侧不配置特別之載體或者接觸體而照射紫外線之形態當然 亦包含於本發明中。 以下，首先說明構成偏光板5之偏光膜丨、透明樹脂膜2 與3、及接著劑，其後說明偏光板之製造方法。 [偏光膜] 偏光膜包含聚乙烯醇系樹脂，該聚乙烯醇系樹脂係藉由 使聚乙酸乙烯酯系樹脂皂化而獲得。聚乙酸乙烯酯系樹脂 除了作為乙酸乙烯酯之均聚物的聚乙酸乙烯酯以外，亦可 為乙酸乙烯酯與可與其共聚合之其他單體之共聚物。作為 與乙酸乙烯酯共聚合之其他單體，例如可列舉：不飽和羧 酸類、不飽和磺酸類、烯烴類、乙烯醚類、具有銨基之丙 烯醢胺類等。聚乙烯醇系樹脂之皂化度通常為85〜1〇〇莫耳 163281.doc 201248218 %，較佳為98莫耳％以上。聚乙烯醇系樹脂亦可進而獲得 改性，例如亦可使用經醛類改性之聚乙烯醇縮乙醛等。聚 乙烯醇系樹脂之平均聚合度通常為1,000〜1〇,〇〇〇左右，較 佳為1，500〜5,000之範圍。 將聚乙烯醇系樹脂製成膜狀，而用作偏光膜之原料膜。 將聚乙烯醇系樹脂成膜之方法並無特別限定，可利用公知 方法成膜。包含聚乙烯醇系樹脂之原料膜例如可設為 10〜150 μπι左右之膜厚。 偏光膜通常經由下述步驟而製造：延伸聚乙稀醇系樹脂 膜，利用二色性色素將聚乙稀醇系樹脂膜染色，而使該二 色性色素吸附；利用侧酸水溶液對吸附有二色性色素之聚 乙烯醇系樹脂膜進行處理；及於利用該硼酸水溶液之處理 後進行水洗。 延伸可於利用二色性色素進行染色之前進行，亦可與染 色同時進行，亦可於染色之後進行。於在染色之後進行延 伸之情形時，該延伸可於硼酸處理之前進行，亦可於硼酸 處理中進行。當然，亦可於該等複數個階段進行延伸。當 進行延伸時，可於周速不同之夾輥間進行延伸，亦可使用 熱棍進行延伸H採用於大氣中進行延伸之乾式延 伸’亦可採歸制溶驗㈣社㈣下進行延伸之濕 式延伸。其延伸倍率通常為3〜8倍左右。 於將聚乙烯醇系樹脂膜於利用二色性色素進行染色時， 例如採用於包含二色性色素之水溶液中浸潰聚乙烯醇系樹 脂膜之方法。作為二色性色素’具體而言，使用碘或二色 16328 丨.doc 201248218 性之有機染料。再者’於利用二色性色素進行染色處理之 前，聚乙烯醇系樹脂膜較佳為預先實施於水中之浸潰處 理’而使其充分地膨潤。 於使用埃作為二色性色素之情料，通常採用於包含峨 及碘化鉀之水溶液中，浸潰聚乙烯醇系樹脂膜而進行染色 之方法。㈣水溶液中之似魏鉀之含量為：每⑽重 量份水’㈣常為（UHM重量份，蛾化料常為Μ〜㈣ 量份。染色所使用之水溶液之溫度通常為2()〜贼，於該 水溶液中之浸潰時間（染色時間）通常為2〇〜18〇〇秒。Λ 另-方面’於使用二色性之有機染料作為二色性色素之 情形時，通常㈣於包含水溶性之二色性有機染料之水溶 液中，浸潰聚乙稀醇系樹脂膜而進行染色之方法。於該水 溶液中之二色性染料之含量為：每1〇〇重量份水，通常為 1ΧΗΤΜ0重量份，較佳為重量份。該水溶液亦可 含有硫酸納之類的無機鹽作為染色助劑。冑色所使用之染 科水溶液之溫度通常為20〜80t ’於該水溶液中之浸潰時 間（染色時間）通常為1〇〜1，8〇〇秒。 利用二色性色素之染色後之硼酸處理係藉由將經染色之 聚乙稀醇系樹脂膜浸潰於含有删酸之水溶液中之方法而進 订。含有侧酸之水溶液中之硼酸之量為：每100重量份 水1常為2〜15重量份’較佳為5〜12重量份。於使用礙作 二色f生色素之清形時，該含有蝴酸之水溶液較佳為進而 3有蛾化鉀。含有賴之水溶液中之魏^量為：每 100重量份水，通常為0.H5重量份，較佳為5〜12重量 16328 丨.doc 201248218 份》於含有硼酸之水溶液中之浸潰時間通常為604,200 秒，較佳為150〜600秒，進而較佳為200〜4〇〇秒》含有蝴酸 之水溶液之溫度通常為5(TC以上，較佳為50〜85°C，進而 較佳為60〜80°C。 侧酸處理後之聚乙烯醇系樹脂膜通常進行水洗處理。水 洗處理例如可藉由將經硼酸處理之聚乙烯醇系樹脂膜浸潰 於水中之方法而進行。水洗處理中之水之溫度通常為 2〜40 C ’浸潰時間通常為2〜120秒。水洗後實施乾燥處理 而獲得偏光膜。乾燥處理可使用熱風乾燥機或遠紅外線加 熱器等進行。 該乾燥處理係於保持為40〜100°C、較佳為50〜l〇〇t之乾 燥爐中’以30〜600秒左右而進行。乾燥爐亦可有複數個， 於設置複數個乾燥爐之情形時，各乾燥爐之溫度可相同， 亦可不同。於設置複數個乾燥爐進行乾燥之情形時，尤佳 為以使溫度自乾燥爐前段向乾燥爐後段提高之方式設置溫 度斜率。 如此所獲得之偏光膜之厚度例如可設為5〜4〇 μιη左右， 較佳為10〜3 5 μιη。 [透明樹脂膜] 於本發明中’經由紫外線硬化型接著劑將透明樹脂膜 2、：·丨貼合於包含藉由上述方式製造之聚乙烯醇系樹脂之偏 光膜1之一面或兩面，而製造偏光板5。 透明樹脂膜2、3為包含具有透明性之熱塑性樹脂之膜即 可’於偏光板領域使用之各種膜亦可於本發明中同樣地使 16328 丨.doc 201248218 用。若列舉可成為透明樹脂膜2、3之樹脂之例，則有以三 乙酿纖維素或二乙醯纖維素為代表例之乙酸纖維素系樹 脂’以環狀烯烴系樹脂為代表例之非晶質聚烯烴樹脂，以 聚丙稀系樹脂為代表例之晶質聚烯烴樹脂，以曱基丙烯酸 曱酯系樹脂為代表例之丙稀酸系樹脂，以聚對苯二曱酸乙 二酯系樹脂為代表例之聚酯樹脂、聚碳酸酯樹脂等。 乙酸纖維素系樹脂為纖維素之部分或完全酯化物，例如 可列舉：纖維素之乙酸乙酯 '丙酸酯、丁酸酯、該等之混 合醋等。更具體而言，可列舉：三乙醯纖維素、二乙醯纖 維素、乙酸丙酸纖維素、乙酸丁酸纖維素等。包含乙酸纖 維素系樹脂之膜可使用適宜之市售品。若列舉本發明中採 用之適且之市售乙酸纖維素系樹脂膜之例，則以商品名表 示，有由富士軟片股份有限公司銷售之「Fujitac TD8(^、 「Fujitac TD80UF」及「Fujitac TD80UZ」，由 KonicaIt is bonded to both sides of the polarizing film 1, and is preferably used as the two sides of the polarizing film 1. In the example Φ shown in the figure, the laminated body 4 after the lamination of the 1 ^ is adhered to the contact body 23 having the convex curved surface in the conveying direction thereof, and the sandwiched laminated body 4 is disposed in the opposite line irradiation device. It is preferable that the polarizing plate 5 manufactured as shown in Fig. 4 (4) is wound up onto the product roll 3 through the transfer guide roller 24 and the take-up front nip rollers 25 and 26. The guide rollers 28 and 28 for transport are suitably disposed on the surface of the polarizing film 1 or on the surfaces of the first transparent resin film 2 and the second transparent resin film 3 on which the adhesive is not applied. The straight line H in the circle indicates the direction of travel of the 敎, and the direction of rotation of the curved head (4) is pure. Further, the ultraviolet ray irradiated onto the laminated body 4 substantially includes only a wavelength of 4 〇〇 nm or less. In the example shown in the drawing, a wavelength filter that can cut off light of a wavelength of 4 〇〇 nm or more between the ultraviolet ray irradiation device 16 and the laminated body 4 is disposed on the side of the light emitted from the ultraviolet ray irradiation device 16 . 18, the light emitted from the ultraviolet ray irradiation device 16 passes through the wavelength filter 18 to substantially block the light of a wavelength of 400 nm or more, and in fact, only ultraviolet rays having a wavelength of 4 〇〇 nm or less are irradiated onto the laminated body 4 by β In the ultraviolet irradiation device 16, as described below, a mercury lamp, a metal halide lamp or the like is used as a light source. Although the above-mentioned general ultraviolet light source mostly includes ultraviolet rays having a wavelength of 400 nm or less, the wavelength region thereof is widely distributed from the ultraviolet region to the visible region. White or purple when lit by this light source. When such a general ultraviolet light source is used, light of a wavelength of 400 nm or more is substantially blocked by the wavelength filter 18 as shown. On the other hand, for example, there is also a light source which emits substantially only ultraviolet rays having a wavelength of 163281.doc 201248218 400 nm as an excimer laser light source, and therefore such a light source can also be used. However, such a light source which emits substantially only ultraviolet light having a wavelength of 4 〇〇 nm or less is generally expensive, and therefore practically adopts a form in which an ultraviolet light source which also generates visible light is used as a wavelength filter 丨8 as shown in the drawing, The shape of light that is interrupted by wavelengths above 400 nm. The production method of the present invention can of course be applied to a polarizing film cut into a single sheet and a transparent resin film, which are bonded together via an ultraviolet curing type adhesive, and irradiated with ultraviolet rays to harden the above-mentioned adhesive to produce polarized light. The single-piece form of the board, especially in the production of work, as shown in Figure 适用 is suitable for continuous production. “Also, the ultraviolet irradiation method is not limited to the contact with the roller, which is preferably formed by the roller. In the form of irradiation in the state of the body 23, for example, a form in which ultraviolet rays are not disposed on the side opposite to the ultraviolet irradiation device 丨6 of the laminate 4, and the ultraviolet ray is not disposed, is of course included in the present invention. Hereinafter, first, the polarizing film 构成, the transparent resin films 2 and 3, and the adhesive constituting the polarizing plate 5 will be described, and a method of manufacturing the polarizing plate will be described later. [Polarizing film] The polarizing film contains a polyvinyl alcohol-based resin obtained by saponifying a polyvinyl acetate-based resin. Polyvinyl acetate-based resin In addition to polyvinyl acetate which is a homopolymer of vinyl acetate, it may be a copolymer of vinyl acetate and another monomer copolymerizable therewith. Examples of the other monomer copolymerized with vinyl acetate include unsaturated carboxylic acids, unsaturated sulfonic acids, olefins, vinyl ethers, and acrylamides having an ammonium group. The degree of saponification of the polyvinyl alcohol-based resin is usually 85 to 1 Torr, 163,281.doc, 2012,482%, preferably 98% by mole or more. The polyvinyl alcohol-based resin may be further modified, and for example, an aldehyde-modified polyvinyl acetal or the like may be used. The average degree of polymerization of the polyvinyl alcohol-based resin is usually 1,000 to 1 Torr, preferably about 1,500 to 5,000. The polyvinyl alcohol-based resin is formed into a film shape and used as a raw material film of a polarizing film. The method of forming the polyvinyl alcohol-based resin into a film is not particularly limited, and a film can be formed by a known method. The raw material film containing a polyvinyl alcohol-based resin can be, for example, a film thickness of about 10 to 150 μm. The polarizing film is usually produced by stretching a polyethylene glycol-based resin film, dyeing the polyethylene-based resin film with a dichroic dye, and adsorbing the dichroic dye; The polyvinyl alcohol-based resin film of the dichroic dye is treated; and after the treatment with the aqueous boric acid solution, it is washed with water. The stretching can be carried out before the dyeing with the dichroic dye, or simultaneously with the dyeing, or after the dyeing. In the case of stretching after dyeing, the stretching may be carried out before the boric acid treatment or in the boric acid treatment. Of course, it is also possible to extend at these multiple stages. When extending, it can be extended between nip rolls with different peripheral speeds. It can also be extended by hot rods. H can be extended in the atmosphere for dry extension. It can also be used for the determination of wetness. Extended. The stretching ratio is usually about 3 to 8 times. When the polyvinyl alcohol-based resin film is dyed with a dichroic dye, for example, a method of impregnating a polyvinyl alcohol-based resin film in an aqueous solution containing a dichroic dye is used. As the dichroic pigment, specifically, iodine or a dichroic 16328 丨.doc 201248218 organic dye is used. In addition, the polyvinyl alcohol-based resin film is preferably subjected to a dipping treatment in water before being dyed by a dichroic dye to sufficiently swell. In the case of using erbium as a dichroic dye, it is usually used in a method of impregnating a polyvinyl alcohol-based resin film in an aqueous solution containing cerium and potassium iodide. (4) The content of Wei-like potassium in the aqueous solution is: per (10) parts by weight of water '(4) is usually (UHM parts by weight, moth material is usually Μ~(4) parts. The temperature of the aqueous solution used for dyeing is usually 2 () ~ thief The immersion time (dyeing time) in the aqueous solution is usually 2 〇 18 〇〇 Λ Λ Λ - 方面 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于 于A method of dyeing a polyethylene glycol-based resin film in an aqueous solution of a dichroic organic dye, wherein the content of the dichroic dye in the aqueous solution is: 1 ΧΗΤΜ0 per 1 part by weight of water. The aqueous solution may also contain an inorganic salt such as sodium sulphate as a dyeing aid. The temperature of the aqueous solution of the dyeing solution used in the ochre is usually 20 to 80 t's immersion time in the aqueous solution. (dyeing time) is usually 1 〇 to 1, 8 sec. The boric acid treatment after dyeing with a dichroic dye is obtained by immersing the dyed polyethylene resin film in an aqueous solution containing acid The method of ordering. Containing side acid The amount of boric acid in the solution is usually 2 to 15 parts by weight per 100 parts by weight of water 1 'preferably 5 to 12 parts by weight. When the use is a clear form of the dichromatic pigment, the butterfly is contained. Preferably, the aqueous solution further comprises potassium molybdenum. The amount of Wei in the aqueous solution containing Lai is: usually 0.5 parts by weight per 100 parts by weight of water, preferably 5 to 12 parts by weight, 16328 丨.doc 201248218 parts The immersion time in the aqueous solution containing boric acid is usually 604,200 seconds, preferably 150 to 600 seconds, and more preferably 200 to 4 sec. The temperature of the aqueous solution containing the citric acid is usually 5 (TC or more, preferably It is 50 to 85 ° C, and more preferably 60 to 80 ° C. The polyvinyl alcohol-based resin film after the side acid treatment is usually subjected to a water washing treatment, and the water washing treatment can be carried out, for example, by a boric acid-treated polyvinyl alcohol-based resin film. The temperature of the water in the water washing treatment is usually 2 to 40 C'. The impregnation time is usually 2 to 120 seconds. After washing with water, drying treatment is carried out to obtain a polarizing film. Drying can be carried out using a hot air dryer. Or a far infrared heater or the like. The drying process is maintained as In a drying oven of 40 to 100 ° C, preferably 50 to 1 〇〇t, it is carried out in about 30 to 600 seconds. There may be a plurality of drying ovens, and in the case of setting a plurality of drying furnaces, each drying furnace The temperature may be the same or different. When a plurality of drying ovens are provided for drying, it is preferable to set the temperature slope so that the temperature is increased from the front portion of the drying furnace to the rear portion of the drying furnace. The thickness of the polarizing film thus obtained For example, it can be set to about 5 to 4 〇μηη, preferably 10 to 3 5 μηη. [Transparent Resin Film] In the present invention, the transparent resin film 2, 丨, 丨 is attached via an ultraviolet curing type adhesive. The polarizing plate 5 is produced by one surface or both surfaces of the polarizing film 1 of the polyvinyl alcohol-based resin produced in the above manner. The transparent resin films 2 and 3 are films containing a thermoplastic resin having transparency, that is, various films which can be used in the field of polarizing plates. In the present invention, 16328 丨.doc 201248218 can also be used in the same manner. In the case of the resin which can be used as the resin of the transparent resin film 2, 3, the cellulose acetate-based resin which is a representative example of triethyl cellulose or diethyl acetyl cellulose is a representative example of the cyclic olefin resin. Crystalline polyolefin resin, a crystalline polyolefin resin represented by a polypropylene resin, an acrylic resin represented by a decyl acrylate resin, and a polyethylene terephthalate The resin is a representative example of a polyester resin, a polycarbonate resin or the like. The cellulose acetate-based resin is a partial or complete esterified product of cellulose, and examples thereof include ethyl acetate of cellulose, propionate, butyrate, and the like. More specifically, it may, for example, be triacetin cellulose, diacetyl cellulose, cellulose acetate propionate or cellulose acetate butyrate. As the film containing the cellulose acetate resin, a commercially available product can be used. In the example of the commercially available cellulose acetate-based resin film which is suitable for use in the present invention, "Fujitac TD8 (^, "Fujitac TD80UF" and "Fujitac TD80UZ" sold by Fujifilm Co., Ltd. By Konica
Minolta Opto股份有限公司銷售之「KC8UX2m」、 「KC8UY」及「KC4UY」等。 乙酸纖維素系樹脂膜於將偏光板貼著於液晶單元上時， 有時配置於液晶單元側。於此情形時，對於該乙酸纖維素 系樹脂膜，較佳為賦予光學補償功能。例如可列舉：使乙 酸纖維素系樹脂含有具有相位差調整功能之化合物而成之 膜、於乙酸纖維素系樹脂膜之表面塗佈具有相位差調整功 能之化合物而成之膜、將乙酸纖維素系樹脂膜單軸或雙軸 延伸而成之膜等。若列舉市售之乙酸纖維素系光學補償膜 之例，則有由富士軟片股份有限公司銷售之「 163281.doc 12 201248218"KC8UX2m", "KC8UY" and "KC4UY" sold by Minolta Opto Co., Ltd. When the cellulose acetate resin film is attached to the liquid crystal cell, the liquid crystal cell may be disposed on the liquid crystal cell side. In this case, it is preferred to impart an optical compensation function to the cellulose acetate resin film. For example, a film obtained by including a compound having a phase difference adjusting function in a cellulose acetate resin, a film having a phase difference adjusting function on the surface of the cellulose acetate resin film, and cellulose acetate are used. A film obtained by stretching a resin film uniaxially or biaxially. If an example of a commercially available cellulose acetate-based optical compensation film is listed, it is sold by Fujifilm Co., Ltd. "163281.doc 12 201248218
View)膜 WVBZ438」及「WV(WIDE VIEW)膜 WVEA」’由 Konica Minolta Opto股份有限公司銷售之「KC4FR-1」、 「KC4HR-1」及「KC4UEW」等。 非晶質聚烯烴樹脂係具有源自降冰片烯或多環降冰片稀 系單體之類的環狀烯烴之結構單元的樹脂，亦可為環狀缔 烴與其他具有聚合性碳-碳雙鍵之化合物的共聚物。具體 而言，可列舉：使降冰片烯或其衍生物進行開環複分解聚 合，將所獲得之聚合物氫化而使不飽和鍵消失之稱為熱塑 性飽和降冰片烯系樹脂者；對降冰片烯或其衍生物加成聚 合縫狀稀烴及/或芳香族乙稀基化合物而成者。 包含非晶質聚烯烴樹脂之膜可使用適宜之市售品。若列 舉本發明中採用之適宜之市售非晶質聚烯烴樹脂膜之例， 則以商品名表示’有由JSR(japari Synthetic Rubber)股份有 限公司銷售之「ART〇N膜」、由日本ZE〇N股份有限公司銷 售之「ZEONOR膜」、由積水化學工業股份有限公司銷售 之1' S-SINA相位差膜」等。 晶質聚烯烴樹脂係以如乙烯或丙烯之鏈狀烯烴為主要結 構早7L的晶質樹脂’尤其以聚丙稀系樹脂為代表。於聚丙 稀系树知中，除了丙烯之均聚物以外，亦包含丙稀與可與 其之其他單體、例如乙烯或α-烯烴之無規共聚物、 嵌段共聚物等。包含聚丙烯系樹脂之膜亦可使用適宜之市 若列舉適且之市售聚丙烯系樹脂膜之例，則以商品 示有由二井化學Tohcello股份有限公司銷售之View) Film WVBZ438" and "WV (WIDE VIEW) film WVEA" are sold by Konica Minolta Opto Co., Ltd. as "KC4FR-1", "KC4HR-1" and "KC4UEW". The amorphous polyolefin resin is a resin having a structural unit derived from a cyclic olefin such as norbornene or a polycyclic norbornene thin monomer, and may also be a cyclic hydrocarbon and other polymerizable carbon-carbon double A copolymer of a bond compound. Specifically, a method of subjecting norbornene or a derivative thereof to ring-opening metathesis polymerization, and hydrogenating the obtained polymer to cause the unsaturated bond to disappear is referred to as a thermoplastic saturated norbornene-based resin; Or a derivative thereof is obtained by adding a polymerized slit-like hydrocarbon and/or an aromatic vinyl compound. As the film containing the amorphous polyolefin resin, a commercially available product can be used. When an example of a commercially available amorphous polyolefin resin film suitable for use in the present invention is exemplified, the "ART〇N film" sold by JSR (japari Synthetic Rubber) Co., Ltd., and the Japanese ZE are shown by the trade name. "ZEONOR film" sold by 〇N Co., Ltd., 1' S-SINA retardation film sold by Sekisui Chemical Industry Co., Ltd., etc. The crystalline polyolefin resin is a crystalline resin having a chain structure of olefin such as ethylene or propylene as a main structure, and is particularly represented by a polypropylene resin. In the case of the polypropylene tree, in addition to the homopolymer of propylene, a random copolymer, a block copolymer or the like which may be propylene and other monomers such as ethylene or an α-olefin may be contained. A film containing a polypropylene-based resin may be used as an example of a commercially available polypropylene-based resin film, and is commercially available from Toki Chemical Co., Ltd.
Xohccllo I > rti φ ,-¾ ,.. 田果洋紡績股份有限公司銷售之「pylen 163281.doc 201248218 膜」由T〇ray股伤有限公司銷售之「T〇rayfan」、由§unT〇x 股份有限公司銷售之r SunTox」、由filmAX公司銷售之 「FILMAX 〇卩卩膜」等。 丙烯酸系樹脂係以甲基丙烯酸烷基酯為主要結構單元之 樹脂，尤其以將甲基丙烯酸甲酯作為主要結構單元之甲基 丙烯酸曱酯系樹脂為代表。包含丙烯酸系樹脂之膜亦可使 用適宜之市售品。若列舉適宜之市售丙烯酸系樹脂膜之 例，則以商品名表示，有由住友化學股份有限公司銷售之 「Technolloy」、由三菱麗陽股份有限公司銷售之 「ACRYPLEN」等。 聚酯樹脂係於主鏈上具有酯鍵_c〇〇_之樹脂，有聚對苯 二甲酸乙二酯系樹脂或聚對苯二曱酸丁二酯系樹脂、聚萘 二甲酸乙二酯系樹脂等，尤其以聚對苯二曱酸乙二酯系樹 脂為代表。聚對苯二甲酸乙二酯系樹脂通常為重複單元之 80莫耳％以上由對苯二曱酸乙二酯構成之樹脂，亦可含有 源自其他共聚合成分之結構單元。包含聚對苯二曱酸乙二 酯系樹脂之膜亦可使用適宜之市售品。若列舉適宜之市售 聚對苯二甲酸乙二酯系樹脂膜之例，則以商品名表示，有 由二菱樹脂股份有限公司銷售之「Diaf〇il」、由杜邦帝人 薄膜股份有限公司銷售之「Teijin Tetoron膜」、由東洋紡 績股份有限公司銷售之r東洋紡酯膜」及「cosmosh^l、 由T〇ray股份有限公司銷售之「Lumirr〇r」、由股份 有限公司銷售之「EMBLET」等。 聚碳酸醋樹脂係於主鏈上具有碳酸酯鍵-0-C〇-0_之樹 163281.doc 201248218 脂，例如以將雙紛A為原料之樹脂為代表。包含聚碳酸醋 樹脂之膜亦可使用適宜之市售品。若列舉適宜之市售聚碳 酸醋樹脂之例，則以商品名表示，有由三菱工程塑膠股份 有限公司㈣之「IupilGn Sheet」、由帝人化成股份有限公 司銷售之「Panlite Sheet」等。 於透明樹脂膜2、3上，亦可在貼合於偏光則上之前， 對貼合面實施矣化處理、電暈處理、底塗處理、增點塗層 處理等易接著處理。又，於透明樹脂膜2、3之與向偏光膜 1之貼合面相反側之面上亦可具有硬塗層、抗反㈣、防 眩層等各種處理層。透明樹脂膜2、3之厚度通常為5〜2〇〇 左右之範圍，較佳為10〜120㈣，進而較佳㈣〜85 μιη » [接著劑] 就耐候性或折射率、陽離子聚合性等觀點而言，用以將 偏光膜嘱明樹脂膜2、3貼合之接著劑使用紫外線硬化 型接著劑。關於紫外線硬化型接著劑，有藉由自由基聚合 而硬化者及藉由陽離子聚合而硬化者，但如上述之 JP2_-245925-〇所記載，尤佳為使用以分子内不含芳 香環之環氧化合物為主成分之陽離子聚合性之接著劑。作 為此種分子内不含芳香環之環氧化合物，例如有氫化環氧 樹脂、脂環式環氧樹腊、月旨肪族環氧樹脂等。藉由紫外線 之照射使以環氧化合物為代表例之陽離子聚合性之化合物 產生陽離子種或路易斯酸’並調配引發陽離子聚合性化合 物之陽離子聚合的光陽離子聚合起始劑，而製備紫外線硬 I63281.doc -15- 201248218 里接著劑λ外，於紫外線硬化型接著劑中亦可調配藉 由加熱而產生陽離子種或路易斯酸而引發陽離子聚合性化 。物之陽離子聚合的陽離子熱聚合起始劑、光敏劑等各種 添加劑。 [偏光板之製造方法] 其·人，參照圖1說明本發明之偏光板之製造方法。若對 圖1之裝置再次進行說明，則於該例中，以如下之方式構 成裝置.於沿著固定方向搬送之偏光膜丨之一面供給第一 透明樹脂膜2，於偏光膜丨之另一面供給第二透明樹脂膜 3，该等3個膜藉由貼合用夾輥21、22而貼合製成積層體 4 ’並接受來自紫外線照射裝置16之紫外線照射後，經由 搬送用導輥24及捲取前夾輥25、26，將所獲得之偏光板5 捲取至製品親3 0上。 偏光膜1於未圖示之偏光膜製造步驟中，藉由上述方 法’於經由單軸延伸、利用二色性色素之染色、及染色後 之棚酸處理而製造之狀態下直接供於聚乙烯醇系樹脂膜之 情形較多’當然’亦可將偏光膜製造步驟中之製造者暫時 捲取至輥上後’再利用捲出機捲出。另一方面，第一透明 樹脂膜2及第二透明樹脂膜3分別自未圖示之輥利用捲出機 捲出。各個膜以相同之搬送速度，以行進方向相同之方式 搬送。 第一透明樹脂膜2係於與其偏光膜1貼合之面上，預先自 第一塗佈機11塗佈接著劑後，將此接著劑塗佈面貼合於偏 光膜1之一面。另一方面’第二透明樹脂膜3係於與其偏光 163281.doc 16 201248218 膜1貼合之面上，預先自第二塗佈機13塗佈接著劑後，將 此接著劑塗佈面貼合於偏光膜1之另一面。 第一塗佈機11及第二塗佈機13係以自各自所具備之凹版 輥12、14 ’對第一透明樹脂膜2及第二透明脂膜3塗佈接著 劑。此處所謂凹版輥係指具有凹槽之輥，於此凹槽中預先 填充接著劑，於此狀態下在透明樹脂膜2、3上旋轉，藉此 將接著劑轉印至透明樹脂膜2、3上。此處所示之例中，凹 版輥12 ' 14相對於第一透明樹脂膜2及第二透明樹脂膜3之 各自搬送方向，以各自之接觸部反向旋轉。除此以外，塗 佈機11、13亦可應用到刀、線棒、模具塗佈、卡馬 (comma)塗佈等其他塗佈方式，若考慮到對薄膜塗覆、送 料線之自由度、寬幅化之對應等，則較佳為具備如圖示之 凹版輥12、14之凹版印刷塗佈機。 於使用具備凹版輥12、14之凹版印刷塗佈機作為第一塗 佈機11及第二塗佈機13而塗佈接著劑之情形時，藉由調整 相當於透明樹脂膜2、3之前進速度之線速與凹版輥12、14 之旋轉周速度的比，可適宜調節接著劑層之厚度。接著劑 層之塗佈厚度較佳為例如設為約1〜1 〇 μιη。 塗佈有接著劑之第一透明樹脂膜2及第二透明樹脂膜3係 將接著劑塗佈面分別貼合於偏光膜1上，利用貼合用夾輥 21、22進行夾持對厚度方向加壓，而製成三者之積層體 4，並向接觸體23搬送。接觸體23具有沿著上述積層體4之 搬送方向（長度方向）形成為圓弧狀之凸曲面。並且，積層 體4與接觸體23之凸曲面密接並搬送’於此過程中接受來 16328I.doc •17· 201248218 2外線照射裝置16之紫外線照射，使接著劑聚合硬化。 於圓不之例中，接觸體23由輕構成。除此以外，接觸_ 亦可由例如環形傳送帶等構成，但通常由如圖示之輕、而 且是金屬輥構成。 尤其疋’由金屬輥構成接觸體23，使其具有溫度調節功 能，而作為冷卻輥發揮作用，就減小因照射紫外線而產生 之熱之影響的觀點而言較為有效。溫度調節功能可藉由於 金屬輥之内部設置流體通路，於此處藉由冷卻用之流體、 例如流動水之方式等而賦予。於此情形時，冷卻輕之表面 溫度較佳為設為20〜25Τ' * 士· Α C左右。於由金屬輥構成接觸體23 ^情形時’於其表面實施鑛硬絡處理或陶竞喷敷處理等而 提高表面硬度亦較為有效。 使積層體4之第二透明樹脂膜3側與接觸體23密接，自紫 外線照射裝置對積層體4之相反側、即第一透明樹脂心 側照射紫外線。 此時，於紫外線照射裝置16之發出光之側、即紫外線照 射裝置16與積層體4之間，設置可截止4〇〇 nm以上之波長 之光之波長濾波器18，將自紫外線照射裝置16發出之光通 過其波長濾波器18，實質上遮斷4〇〇 nm以上之波長之光’ 使事實上僅包含400 nm以下之波長之紫外線照射至積層體 4上。藉由該紫外線照射，使位於第一透明樹脂膜2與偏光 膜1之間之接著劑、及位於偏光膜i與第二透明樹脂膜3之 間之接著劑分別硬化，使第一透明樹脂膜2與偏光膜1、及 第二透明樹脂膜3與偏光膜1接著。 16328 丨.doc 201248218 波長慮波器18之材質並無特別限定，但就耐熱性之觀點 而言，較佳為藉由真空蒸鍍法、離子輔助蒸鍍法、濺鍍法 等，於基板上製成介電膜或金屬膜者，波長濾波器18可使 用能夠截止4〇0 nm以上之波長之光之適宜市售品，尤佳為 波長位於250 nm至400 nm之間之光之穿透率之平均值為 80%以上，尤其為85。/。以上，且位於波長4〇〇 nm以上、至 少至500 nm為止之範圍之光之穿透率之平均值未達5%， 進而為2%以下，尤其是1%以下。 紫外線照射裝置16所使用之光源並無特別限定，可使用 於波長400 nm以下具有發光分佈之例如低壓水銀燈、中壓 水銀燈、高壓水銀燈、超高壓水銀燈、化學燈、黑光燈、 微波激發水銀燈、金；^素燈f ,對紫外線硬化型接著劑 之光照射強度根據所使用之接著劑之組成等決定即可，同 樣無特別限定，但較佳為使對起始劑之活性化有效之波長 區域之照射強度為(M〜！，〇〇〇 mW/em2。 用之紫外線硬Xohccllo I > rti φ , -3⁄4 ,.. "pylen 163281.doc 201248218 Membrane" sold by Tianguoyang Textile Co., Ltd. "T〇rayfan" sold by T〇ray Co., Ltd., by §unT〇x "SunTox" sold by the company, "FILMAX film" sold by filmAX, etc. The acrylic resin is a resin having an alkyl methacrylate as a main structural unit, and is particularly represented by a methacrylate-based resin having methyl methacrylate as a main structural unit. A film containing an acrylic resin may also be a commercially available product. In the case of a commercially available acrylic resin film, "Technolloy" sold by Sumitomo Chemical Co., Ltd., "ACRYPLEN" sold by Mitsubishi Rayon Co., Ltd., and the like are listed. The polyester resin is a resin having an ester bond _c〇〇_ in the main chain, and is a polyethylene terephthalate resin or a polybutylene terephthalate resin or polyethylene naphthalate. It is a resin or the like, and is particularly represented by a polyethylene terephthalate resin. The polyethylene terephthalate resin is usually a resin composed of 80 parts per million or more of repeating units of ethylene terephthalate, and may contain a structural unit derived from other copolymerized components. As the film containing the polyethylene terephthalate resin, a commercially available product can also be used. In the case of a commercially available polyethylene terephthalate resin film, it is sold under the trade name "Diaf〇il" sold by Mitsubishi Plastics Co., Ltd. and sold by DuPont Teijin Film Co., Ltd. "Teijin Tetoron Film", "Toyo Sewing Membrane" sold by Toyobo Co., Ltd. and "cosmosh^l", "Lumirr〇r" sold by T〇ray Co., Ltd., "EMBLET" sold by the company Wait. The polycarbonate resin is a tree having a carbonate bond-0-C〇-0_ in the main chain. 163281.doc 201248218 A grease is represented, for example, by a resin which uses a double-phase A as a raw material. As the film containing the polycarbonate resin, a commercially available product can also be used. For example, the "IupilGn Sheet" from Mitsubishi Engineering Plastics Co., Ltd. (4) and the "Panlite Sheet" sold by Teijin Chemicals Co., Ltd., etc., are listed in the trade name. On the transparent resin films 2 and 3, the bonding surface may be subjected to a subsequent treatment such as deuteration treatment, corona treatment, primer treatment, or spot coating treatment before bonding to polarized light. Further, various treatment layers such as a hard coat layer, an anti-reflective (tetra), and an anti-glare layer may be provided on the surface of the transparent resin films 2 and 3 opposite to the bonding surface to the polarizing film 1. The thickness of the transparent resin films 2, 3 is usually in the range of about 5 to 2 Torr, preferably 10 to 120 (four), and more preferably (four) to 85 μm. [Adhesive] viewpoints such as weather resistance, refractive index, and cationic polymerization property. In the adhesive for bonding the polarizing film varnish resin films 2 and 3, an ultraviolet curable adhesive is used. The ultraviolet curable adhesive is cured by radical polymerization and hardened by cationic polymerization. However, as described in JP 2_-245925-〇, it is particularly preferred to use a ring containing no aromatic ring in the molecule. A cationically polymerizable adhesive containing an oxygen compound as a main component. As such an epoxy compound which does not contain an aromatic ring in the molecule, there are, for example, a hydrogenated epoxy resin, an alicyclic epoxy resin wax, and a urethane epoxy resin. The cationically polymerizable compound represented by an epoxy compound is produced by ultraviolet irradiation to produce a cationic species or a Lewis acid', and a cationically polymerized photocationic polymerization initiator which initiates cationic polymerization of the cationically polymerizable compound is prepared to prepare an ultraviolet hard I63281. Doc -15-201248218 In addition to the adhesive λ, a cationic species or a Lewis acid can be generated by heating in the ultraviolet curable adhesive to initiate cationic polymerization. Various additives such as cationic thermal polymerization initiators and photosensitizers for cationic polymerization of the materials. [Manufacturing Method of Polarizing Plate] A method for producing a polarizing plate of the present invention will be described with reference to Fig. 1 . When the apparatus of Fig. 1 is described again, in this example, the apparatus is configured as follows. The first transparent resin film 2 is supplied to one side of the polarizing film 搬 conveyed in the fixed direction, on the other side of the polarizing film 丨The second transparent resin film 3 is supplied, and the three films are bonded together by the nip rollers 21 and 22 for bonding to form the laminated body 4', and after receiving the ultraviolet ray irradiation from the ultraviolet ray irradiation device 16, the transfer guide roller 24 is passed. And winding the front nip rollers 25, 26, and winding the obtained polarizing plate 5 onto the product pro 30. The polarizing film 1 is directly supplied to the polyethylene in a state in which the polarizing film (not shown) is produced by the above method in a state of being produced by uniaxial stretching, dyeing with a dichroic dye, and benzene acid treatment after dyeing. In the case of the alcohol-based resin film, the "of course" can be used to temporarily wind up the manufacturer in the polarizing film production step onto the roll and then rewind the product by the reeling machine. On the other hand, each of the first transparent resin film 2 and the second transparent resin film 3 is taken up by a roller from a roll (not shown). Each film is transported at the same transport speed in the same direction of travel. The first transparent resin film 2 is applied to the surface of the polarizing film 1 by applying an adhesive from the first coater 11 in advance to the surface of the polarizing film 1. On the other hand, the second transparent resin film 3 is attached to the surface of the film 1 which is bonded to the polarizing film 163281.doc 16 201248218, and the adhesive is applied to the adhesive surface after the application of the adhesive from the second coater 13 in advance. On the other side of the polarizing film 1. The first coater 11 and the second coater 13 apply an adhesive to the first transparent resin film 2 and the second transparent grease film 3 from the respective gravure rolls 12 and 14'. Here, the gravure roll refers to a roll having a groove in which an adhesive is preliminarily filled, and in this state, it is rotated on the transparent resin films 2, 3, whereby the adhesive is transferred to the transparent resin film 2, 3 on. In the example shown here, the gravure roll 12'14 is reversely rotated with respect to the respective contact portions with respect to the respective transfer directions of the first transparent resin film 2 and the second transparent resin film 3. In addition, the coaters 11, 13 can also be applied to other coating methods such as knives, wire rods, die coating, comma coating, etc., taking into account the degree of freedom in coating and feeding lines of the film, It is preferable to use a gravure coater including gravure rolls 12 and 14 as shown in the case of widening correspondence or the like. When the adhesive is applied using the gravure coater having the gravure rolls 12 and 14 as the first coater 11 and the second coater 13, the adjustment is made to correspond to the transparent resin film 2, 3 The ratio of the linear velocity of the speed to the rotational peripheral speed of the gravure rolls 12, 14 can be suitably adjusted to the thickness of the adhesive layer. The coating thickness of the layer is preferably set to, for example, about 1 to 1 〇 μιη. The first transparent resin film 2 and the second transparent resin film 3 to which the adhesive is applied are bonded to the polarizing film 1 by the adhesive application surface, and are sandwiched by the bonding nip rollers 21 and 22 in the thickness direction. The laminated body 4 of the three is formed by pressurization, and is conveyed to the contact body 23. The contact body 23 has a convex curved surface formed in an arc shape along the conveying direction (longitudinal direction) of the laminated body 4. Further, the laminated body 4 is in close contact with the convex curved surface of the contact body 23 and conveyed. In the process, the ultraviolet irradiation of the external line irradiation device 16 is received, and the adhesive is polymerized and hardened. In the case of the circle, the contact body 23 is composed of light. Alternatively, the contact _ may be constituted by, for example, an endless belt or the like, but is usually made of a light metal as shown in the figure and is a metal roll. In particular, the contact body 23 is formed of a metal roll to have a temperature adjustment function, and functions as a cooling roll to reduce the influence of heat generated by irradiation of ultraviolet rays. The temperature adjustment function can be provided by providing a fluid passage inside the metal roll, by means of a fluid for cooling, for example, flowing water. In this case, the surface temperature for cooling light is preferably set to about 20 to 25 Τ '* 士· Α C or so. It is also effective to increase the surface hardness by performing a hardening treatment or a ceramic spray treatment on the surface of the contact body 23^ by a metal roll. The second transparent resin film 3 side of the laminated body 4 is brought into close contact with the contact body 23, and ultraviolet rays are irradiated from the ultraviolet ray irradiation device to the opposite side of the laminated body 4, that is, the first transparent resin core side. At this time, a wavelength filter 18 that can cut off light having a wavelength of 4 nm or more is provided between the ultraviolet irradiation device 16 and the laminated body 4 on the side of the light emitted from the ultraviolet irradiation device 16, and the self-ultraviolet irradiation device 16 is provided. The emitted light passes through the wavelength filter 18 to substantially block the light of a wavelength of 4 〇〇 nm or more, and the ultraviolet light having a wavelength of only 400 nm or less is actually irradiated onto the laminated body 4. By the ultraviolet irradiation, the adhesive between the first transparent resin film 2 and the polarizing film 1 and the adhesive between the polarizing film i and the second transparent resin film 3 are respectively cured to form the first transparent resin film. 2, the polarizing film 1, and the second transparent resin film 3 are followed by the polarizing film 1. 16328 丨.doc 201248218 The material of the wavelength filter 18 is not particularly limited, but from the viewpoint of heat resistance, it is preferably deposited on a substrate by a vacuum deposition method, an ion assist deposition method, a sputtering method, or the like. For a dielectric film or a metal film, the wavelength filter 18 may be a commercially available product capable of cutting off light having a wavelength of 4 〇 0 nm or more, and particularly preferably a light having a wavelength between 250 nm and 400 nm. The average value of the rate is above 80%, especially 85. /. As described above, the average value of the transmittance of light in the range of 4 〇〇 nm or more and at least 500 nm is less than 5%, and further 2% or less, particularly 1% or less. The light source used in the ultraviolet irradiation device 16 is not particularly limited, and can be used for, for example, a low-pressure mercury lamp, a medium-pressure mercury lamp, a high-pressure mercury lamp, an ultra-high pressure mercury lamp, a chemical lamp, a black light lamp, a microwave-excited mercury lamp, and a gold having a light-emitting distribution at a wavelength of 400 nm or less. The light irradiation intensity of the ultraviolet curable adhesive is determined depending on the composition of the adhesive to be used, etc., and is not particularly limited, but is preferably a wavelength region effective for activation of the initiator. The intensity of the irradiation is (M~!, 〇〇〇mW/em2.
16328 丨.doc 對積層體4之紫外線之照射時間根據所使用之 化型接著劑之組成等決定，同樣無特別限定，但 轰示為照射強疮组B3 64·。主0日i •19· 201248218 過大’則有時因照射之紫外線，而使透明樹脂膜、偏光膜 及/或接著劑產生劣化。 積層體4之線速亦無特別限定，但較佳為以一面於搬送 方向（長度方向）上施加100〜800 N之張力，一面使累計光量 成為10〜2,000 mJ/cm2之方式，於1〇〜50 m/分左右之範圍内 設定線速。紫外線照射裝置16與積層體4之間距亦並無特 別限定，但較佳為以累計光量成為iO〜2,〇〇〇 mj/cm2之方 式’於10〜500 mm左右之範圍内設定自構成紫外線照射裝 置16之紫外線光源至積層體4之距離（如圖1所示使積層體4 與接觸體23密接之情形時為兩者之最短距離）。由於位於 紫外線照射裝置16側之透明樹脂膜2係利用所照射之紫外 線使接著劑有效地硬化，故而較佳為對構成接著劑之起始 劑之活性化有效之波長區域之一部分或全區域之穿透率成 為6 0 %以上者。 接受紫外線之照射使接著劑硬化之後之積層體4成為偏 光板5 ’經由搬送用導輥24及捲取前夾輥25、26而捲取至 製品輥30上。 [其他說明] 於本發明中，如上所述，於偏光膜1之一面或兩面貼合 透明樹脂膜2、3，可製成偏光板5，但較佳為如之前所說 明般’於偏光膜1之兩面貼合透明樹脂膜2、另一方 面’關於僅將透明樹脂膜貼合於偏光膜1之一面而製成偏 光板之形態，雖然以上說明中省略了關於一方之透明樹脂 膜之說明’但從業者應理解至可容易地實施之程度。 163281.doc •20· 201248218 實施例 以下，揭示實施例，更具體地說明本發明，但本發明不 受該等例之限定。 [實施例1] 使用大致如圖1所示而配置之裝置’將於聚乙稀醇膜上 吸附配向有碘之厚度大約30 μπι之偏光膜1連續地搬送，於 其一面供給自日本ΖΕΟΝ股份有限公司取得之厚度為6〇 且寬度為1，330 mm之作為非晶質聚烯烴樹脂膜之 「ZEONOR膜」作為第一透明樹脂膜2，於另一面供給自 富士軟片股份有限公司取得之厚度為80 μηι且寬度同樣為 1，330 mm之作為三乙醯纖維素膜之「Fujhac TD8〇」作為 第二透明樹脂膜3。並且，於第一透明樹脂膜2向偏光膜i 之貼合面上自具備凹版輥12之第一塗佈機u(富士機械股 伤有限公司製造之「Micro Chamber Doctor」），又，於第 二透明樹脂膜3向偏光膜1貼合面上同樣自具備相同凹版輥 14之第二塗佈機13(同為富士機械股份有限公司製造之 「Micro Chamber· Doctor」），分別以厚度成為約2 μπι之方 式塗佈調配有環氧化合物與光陽離子聚合起始劑之紫外線 硬化型接著劑。 其次，分別將第一透明樹脂膜2及第二透明樹脂膜3之接 著劑塗佈面與偏光膜丨之兩面重疊，並利用貼合用夾輥 21、22夾持而貼合，製成積層體繼續將積層體4之作為 第二透明樹脂膜3之三乙醯纖維素膜側捲繞至表面溫度設 定為坑之冷卻輥23之外周面且密接，同時以線速2〇m,分 16328I.doc 21 201248218 對長度方向施加600 N之張力而進行搬送。 於一面密接於冷卻輥23—面搬送之積層體4之與冷卻輥 23之相反側（作為第一透明樹脂膜2之非晶質聚烯烴樹脂膜 側）’配置紫外線照射裝置16(GS Yuasa股份有限公司製 造）°並且，將自其所具備之二燈式金屬画素燈發出之紫 外線通過波長濾波器18後照射至積層體4上，使接著劑硬 化。自紫外線照射裝置16中之燈至積層體4之最短距離設 定為200 mm。此處使用之波長濾波器18係自京濱光膜工業 股份有限公司取得者，自波長250 nm至400 nm之間之光之 平均穿透率為88%，自波長400 nm至500 nm之間之光之平 均穿透率為1 %。 於圖2中以較粗之曲線A表示用作紫外線光源之金屬鹵素 燈之波長250 nm至500 nm之發光光譜，又，於圖2中以較 細之曲線B表示波長濾波器18之波長250 nm至800 nm之穿 透光譜。於圖2中’橫軸表示A、B共通之波長（nm)，與曲 線A對應之左縱軸表示金屬函素燈之發光強度，與曲線b 對應之右縱軸表示穿透率（％)。再者，燈之發光強度係以 將賦予最大值之波長之強度設為100時之相對值表示。 將紫外線照射裝置16之功率設為120 W時，200〜400 nm 之波長域中之累計光量為510 mJ/cm2 ’照射紫外線時之積 層體4之冷卻輥23附近之環境溫度為liot：。於紫外線照射 後’繼續使搬送用導輥24及捲取前夾輥25、26依序通過， 於偏光膜1之一面貼合非晶質聚烯烴樹脂膜2,並於另一面 貼合三乙醯纖維素膜3 ’獲得厚度約為174 μηι之偏光板5 , 163281.doc •22· 201248218 將其捲取至製品輥30上。使螢光燈之光於所獲得之偏光板 上;又射並目視觀察後，螢光燈之像如實映出，未觀察到熱 不均。 [實施例2] 於實施例1中，使用自三菱樹脂股份有限公司取得之厚 度為38 μπι且寬度為i，33〇 mm之作為雙軸延伸聚對苯二甲 酸乙二酯膜之「Diafoi丨」代替作為非晶質聚烯烴樹脂膜之 「ZEONOR膜」作為第一透明樹脂膜2，使用實施例1中用 作第一透明樹脂膜2之作為非晶質聚烯烴樹脂膜之 「ZE0N0R膜」代替三乙醯纖維素膜「邮加td8〇」作 為第二透明樹脂膜3，λ ’將紫外線照射裝置16之功率設 為140 W ’除此以夕卜以與實施例1相同之方式製造偏光 板。此時，照射至積層體4上之2〇〇〜4〇〇 nm之波長域中之 累計光量為630 mj/cm2，‘照射紫外線時之積層體*之冷卻 親23附近之環境溫度為丨饥。㈣光燈之光於所獲得之 偏光板上反射並目才見觀察後，f光燈之像如實&出，未觀 察到熱不均。 [比較例1] 將自紫外線照射裝置16照射之紫外線不通過波長渡波器 18而照射至積層體4上’除此以外，以與實施例"目同之方 式製造偏光板。此時，照射至積層體4上之2〇〇〜4〇〇 nm之 波長域中之累計光量為51〇 mJ/em2,照射紫外線時之積声 體4之冷純23附近之環境溫度為使螢光燈之光於 所獲得之偏光板上反射並目視觀察後，於螢光燈之像中觀 I63281.doc •23· 201248218 察到許多細小白點，產生熱不均。 [比較例2] 將自紫外線照射裝置16照射之紫外線不通過波長滤波器 18而照射至積層體4上，除此以外，以與實施例2相同之方 式製造偏光板。此時，照射至積層體4上之2〇〇〜400 nm之 波長域中之累計光量為630 mJ/cm2，照射紫外線時之積層 體4之冷卻輥23附近之環境溫度為265。(：。使螢光燈之光於 所獲得之偏光板上反射並目視觀察後，於螢光燈之像令觀 察到許多細小白點，產生熱不均。 【圖式簡單說明】 圖1係表示適合於實施本發明之方法的偏光板之製造裝 置之一例的概略侧視圖。 圖2係表示於下述實施例中用作紫外線光源之金屬鹵素 燈之發光光譜（曲線A)、及用於截止波長4〇〇 nm以上之光 的波長濾波器之穿透光譜（曲線B)的圖表。 【主要元件符號說明】 1 偏光膜 2 第一透明樹脂膜 3 第二透明樹脂膜 4 硬化前之積層體 5 偏光板 11 第一塗佈機 12 第一塗佈機所具備之凹版輥 13 第二塗佈機 163281.doc -24· 201248218 14 第二塗佈機所具備之凹版輥 16 紫外線照射裝置 18 波長濾波器 21 貼合用夾輥 22 貼合用夾輥 23 接觸體（冷卻輥） 24 搬送用導輥 25 捲取前夾輥 26 捲取前夾輥 2 8 導輥 30 製品輥 A 金屬_素燈之發光光譜 B 波長濾波器之穿透光譜 163281.doc -25-16328 丨.doc The irradiation time of the ultraviolet rays of the laminated body 4 is determined according to the composition of the type of the adhesive to be used, and the like, and is also not particularly limited, but the exposure is the irradiation of the strong sore group B3 64·. When the main 0th day i 19·201248218 is too large, the transparent resin film, the polarizing film, and/or the adhesive may be deteriorated by the ultraviolet rays to be irradiated. The line speed of the laminated body 4 is not particularly limited, but it is preferable to apply a tension of 100 to 800 N in the conveying direction (longitudinal direction) so that the integrated light amount is 10 to 2,000 mJ/cm 2 . Set the line speed within the range of ~50 m/min. The distance between the ultraviolet ray irradiation device 16 and the laminated body 4 is not particularly limited. However, it is preferable to set the self-constituting ultraviolet ray in the range of about 10 to 500 mm in such a manner that the integrated light amount is iO 2 and 〇〇〇mj/cm 2 . The distance from the ultraviolet light source of the irradiation device 16 to the laminated body 4 (the shortest distance between the laminated body 4 and the contact body 23 as shown in Fig. 1) is the shortest distance between the two. Since the transparent resin film 2 located on the side of the ultraviolet irradiation device 16 is effective to harden the adhesive by the ultraviolet rays to be irradiated, it is preferably one part or the entire region of the wavelength region effective for activation of the initiator constituting the adhesive. The penetration rate is more than 60%. After the ultraviolet rays are irradiated, the laminate 4 after the adhesive is cured becomes the polarizing plate 5', and is taken up to the product roll 30 via the transfer guide rolls 24 and the take-up front nip rolls 25 and 26. [Others] In the present invention, as described above, the transparent resin films 2 and 3 are bonded to one surface or both surfaces of the polarizing film 1 to form the polarizing plate 5, but it is preferably as described above. On the other hand, the transparent resin film 2 is bonded to both surfaces of the polarizing film 1 to form a polarizing plate, and the description of the transparent resin film is omitted in the above description. 'But practitioners should understand the extent to which they can be easily implemented. 163281.doc • 20·201248218 EXAMPLES Hereinafter, the present invention will be described more specifically by way of examples, but the invention should not be construed as limited. [Example 1] A device which was arranged as shown in Fig. 1 was used, and a polarizing film 1 having a thickness of about 30 μm was adsorbed and adsorbed on a polyethylene film, and was continuously supplied on the one side. The "ZEONOR film" which is an amorphous polyolefin resin film having a thickness of 6 Å and a width of 1,330 mm is obtained as the first transparent resin film 2, and is supplied to the thickness obtained from Fujifilm Co., Ltd. on the other side. As the second transparent resin film 3, "Fujhac TD8" which is a triacetyl cellulose film of 80 μm and a width of 1,330 mm is also used. Further, the first coater u (the "Micro Chamber Doctor" manufactured by Fuji Machine Co., Ltd.) having the gravure roll 12 is attached to the bonding surface of the first transparent resin film 2 to the polarizing film i, and The second transparent resin film 3 is also applied to the second coating machine 13 (the same as the "Micro Chamber Doctor" manufactured by Fuji Machinery Co., Ltd.) having the same gravure roll 14 to the surface of the polarizing film 1, and the thickness is about An ultraviolet curable adhesive in which an epoxy compound and a photocationic polymerization initiator are blended is applied in a manner of 2 μm. Then, the adhesive-coated surface of the first transparent resin film 2 and the second transparent resin film 3 are superposed on both surfaces of the polarizing film ,, and are bonded by the bonding nip rolls 21 and 22 to form a laminate. The body continues to wind the triacetyl cellulose film side of the laminate 4 as the second transparent resin film 3 to the outer peripheral surface of the cooling roll 23 whose surface temperature is set to be pit, and is in close contact with each other while the line speed is 2 〇m, and is divided into 16328I. .doc 21 201248218 A tension of 600 N is applied to the longitudinal direction to carry it. The ultraviolet irradiation device 16 (GS Yuasa shares) is disposed on the side opposite to the cooling roller 23 (on the side of the amorphous polyolefin resin film of the first transparent resin film 2) on the side of the laminated body 4 which is in contact with the surface of the cooling roll 23 In addition, the ultraviolet rays emitted from the two-lamp metal lens lamp provided therein are passed through the wavelength filter 18, and then irradiated onto the laminated body 4 to harden the adhesive. The shortest distance from the lamp in the ultraviolet irradiation device 16 to the laminated body 4 is set to 200 mm. The wavelength filter 18 used here is obtained from Keihin Optical Film Industry Co., Ltd. The average transmittance of light from wavelengths between 250 nm and 400 nm is 88%, and the wavelength is between 400 nm and 500 nm. The average light penetration is 1%. In Fig. 2, the luminescence spectrum of the wavelength of the metal halide lamp used as the ultraviolet light source of 250 nm to 500 nm is indicated by a thicker curve A. Further, the wavelength of the wavelength filter 18 is indicated by a thin curve B in Fig. 2 A transmission spectrum from nm to 800 nm. In Fig. 2, the horizontal axis represents the wavelength (nm) common to A and B, and the left vertical axis corresponding to the curve A represents the luminous intensity of the metal element lamp, and the right vertical axis corresponding to the curve b represents the transmittance (%). . Further, the luminous intensity of the lamp is expressed by a relative value when the intensity of the wavelength to which the maximum value is given is set to 100. When the power of the ultraviolet irradiation device 16 is 120 W, the integrated light amount in the wavelength range of 200 to 400 nm is 510 mJ/cm2. The ambient temperature in the vicinity of the cooling roller 23 of the laminate 4 when irradiated with ultraviolet rays is liot:. After the ultraviolet irradiation, the transfer guide roller 24 and the pre-winding nip rollers 25 and 26 are sequentially passed, and the amorphous polyolefin resin film 2 is bonded to one surface of the polarizing film 1 and the other side is bonded to the other side. The 醯 cellulose film 3' obtained a polarizing plate 5 having a thickness of about 174 μm, 163281.doc • 22· 201248218, which was taken up onto the product roll 30. The fluorescent light was applied to the obtained polarizing plate; after being photographed and visually observed, the image of the fluorescent lamp was faithfully reflected, and no heat unevenness was observed. [Example 2] In Example 1, "Diafoi 作为 as a biaxially-oriented polyethylene terephthalate film having a thickness of 38 μm and a width of i, 33 〇 mm obtained from Mitsubishi Plastics Co., Ltd. was used. The "ZEONOR film" which is an amorphous polyolefin resin film is used as the first transparent resin film 2, and the "ZE0N0R film" which is the amorphous polyolefin resin film used as the first transparent resin film 2 in the first embodiment is used. In place of the triacetonitrile cellulose film "mail plus td8" as the second transparent resin film 3, λ 'the power of the ultraviolet irradiation device 16 was set to 140 W. In addition, polarized light was produced in the same manner as in the first embodiment. board. At this time, the cumulative amount of light in the wavelength range of 2 〇〇 to 4 〇〇 nm irradiated onto the laminated body 4 is 630 mj/cm 2 , and the ambient temperature near the cooling pro 23 of the laminated body* when irradiated with ultraviolet rays is hunger . (4) After the light of the light was reflected on the obtained polarizing plate and observed, the image of the f-light was faithful and unobserved, and no heat unevenness was observed. [Comparative Example 1] A polarizing plate was produced in the same manner as in Example " except that the ultraviolet ray irradiated from the ultraviolet ray irradiation device 16 was irradiated onto the laminated body 4 without passing through the wavelength ferrite 18. At this time, the integrated light amount in the wavelength range of 2 〇〇 to 4 〇〇 nm irradiated onto the laminated body 4 is 51 〇mJ/em 2 , and the ambient temperature in the vicinity of the cold pure 23 of the sound absorbing body 4 when irradiated with ultraviolet rays is After the light of the fluorescent lamp is reflected on the obtained polarizing plate and visually observed, in the image of the fluorescent lamp, I63281.doc • 23· 201248218 many small white spots are observed, resulting in uneven heat. [Comparative Example 2] A polarizing plate was produced in the same manner as in Example 2 except that the ultraviolet ray irradiated from the ultraviolet ray irradiation device 16 was irradiated onto the laminated body 4 without passing through the wavelength filter 18. At this time, the integrated light amount in the wavelength range of 2 〇〇 to 400 nm irradiated onto the laminated body 4 was 630 mJ/cm 2 , and the ambient temperature in the vicinity of the cooling roll 23 of the laminated body 4 when irradiated with ultraviolet rays was 265. (:: After the light of the fluorescent lamp is reflected on the obtained polarizing plate and visually observed, many small white spots are observed in the image of the fluorescent lamp, resulting in uneven heat. [Simple description of the drawing] A schematic side view showing an example of a manufacturing apparatus of a polarizing plate suitable for carrying out the method of the present invention. Fig. 2 is a view showing an emission spectrum (curve A) of a metal halide lamp used as an ultraviolet light source in the following embodiments, and Graph of the breakthrough spectrum (curve B) of the wavelength filter of light having a cutoff wavelength of 4 〇〇 nm or more. [Description of main component symbols] 1 Polarizing film 2 First transparent resin film 3 Second transparent resin film 4 Layer before hardening Body 5 Polarizing plate 11 First coater 12 Gravure roll 13 provided in the first coater Second coater 163281.doc -24· 201248218 14 Gravure roll 16 provided in the second coater UV irradiation device 18 Wavelength filter 21 Bonding nip roller 22 Bonding nip roller 23 Contact body (cooling roller) 24 Transfer guide roller 25 Winding front nip roller 26 Winding front nip roller 2 8 Guide roller 30 Product roller A Metal _ Light spectrum of the lamp B wavelength filter The transmittance spectrum is 163281.doc -25-