TW201634961A - Preparing method for polarizer - Google Patents
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- TW201634961A TW201634961A TW105106679A TW105106679A TW201634961A TW 201634961 A TW201634961 A TW 201634961A TW 105106679 A TW105106679 A TW 105106679A TW 105106679 A TW105106679 A TW 105106679A TW 201634961 A TW201634961 A TW 201634961A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
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Abstract
Description
本發明是關於一種偏光器製造方法。 The present invention relates to a method of fabricating a polarizer.
使用於液晶顯示裝置（LCD）、電場發光（EL）顯示裝置、電漿顯示裝置（PDP）、電場發射顯示裝置（FED）、OLED等各種圖像顯示裝置的偏光板，一般包含吸附定向碘系化合物或二色偏光物質於聚乙烯醇（polyvinyl alcohol，PVA）系膜的偏光器，具有在該偏光器的一面依序積層有偏光器保護膜，在該偏光器的另一面依序積層有偏光器保護膜、與液晶胞元接合的黏著劑層以及離型膜的多層結構。A polarizing plate for various image display devices such as a liquid crystal display device (LCD), an electric field emission (EL) display device, a plasma display device (PDP), an electric field emission display device (FED), an OLED, etc., generally comprising an adsorption oriented iodine system A polarizer having a compound or a dichroic material in a polyvinyl alcohol (PVA) film has a polarizer protective film laminated on one surface of the polarizer, and a polarized film is sequentially laminated on the other surface of the polarizer. The protective film, the adhesive layer bonded to the liquid crystal cell, and the multilayer structure of the release film.
構成像這樣結構的偏光板的偏光器經由潤脹、染色、延伸、交聯、洗淨及乾燥的複雜步驟來製造PVA系膜，但在前述潤脹階段，因為吸收水而潤脹，所以在膜行進方向（MD）及垂直於前述行進方向的方向（TD）會產生皺褶。此皺褶誘發相位差不均勻性（stain）或二色性物質含量的不均勻，成為染色不均勻性產生的原因。The polarizer constituting the polarizing plate having such a structure is manufactured by a complicated process of swelling, dyeing, stretching, crosslinking, washing, and drying, but in the above-described swelling stage, since it absorbs water and swells, Wrinkles are generated in the film traveling direction (MD) and in the direction (TD) perpendicular to the aforementioned traveling direction. This wrinkle induces a phase difference unevenness (stain) or a non-uniformity of the dichroic substance content, which causes a dye unevenness.
又，為了提高透光率，使二色性物質含量減少，但前述染色不均勻性更加深化，產生成為阻礙視認性的主因的問題。Further, in order to increase the light transmittance, the content of the dichroic substance is reduced, but the dyeing unevenness is further deepened, which causes a problem that the visibility is hindered.
再者，最近的現狀是液晶顯示裝置的利用領域擴大，隨著周邊技術進步，對於偏光器性能的要求也更嚴苛。具體來說，要求高對比（高透光率與高偏光度），同時不均勻性減少，色感優良的偏光器。Furthermore, the recent state of the art is that the field of use of liquid crystal display devices is expanding, and as the peripheral technology advances, the requirements for the performance of the polarizer are also more stringent. Specifically, a polarizer that requires high contrast (high transmittance and high degree of polarization) while reducing unevenness and excellent color perception is required.
雖然在韓國公開專利第2009-82197號揭露了偏光器保護膜、偏光板以及圖像顯示裝置，但並沒有提出對前述問題點的建議。Although the polarizer protective film, the polarizing plate, and the image display device are disclosed in Korean Laid-Open Patent Publication No. 2009-82197, no suggestion is made for the aforementioned problems.
先前技術文獻
專利文獻1 韓國公開專利第2009-82197號 Prior Art Document Patent Document 1 Korean Patent Publication No. 2009-82197
發明所欲解決的問題
本發明的目的在於提供一種色感或偏光度優良，可減少染色不均勻性的偏光器製造方法。DISCLOSURE OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION An object of the present invention is to provide a polarizer manufacturing method which is excellent in color feeling or degree of polarization and can reduce dye unevenness.
又，本發明的目的在於提供一種藉由具有改善耐熱性來抑制耐熱條件下產生的紅變現象，收縮力低的偏光器製造方法。Further, an object of the present invention is to provide a method for producing a polarizer which has a red shrinkage phenomenon under heat-resistant conditions and has a low shrinkage force by improving heat resistance.
解決問題的手段
1. 一種偏光器製造方法，包含潤脹、染色、延伸、交聯、補色、水洗及乾燥階段，前述補色階段與水洗階段之間更包含事前熱處理階段。Means of solving problems
A method for producing a polarizer comprising a stage of swelling, dyeing, stretching, crosslinking, complementary color, water washing and drying, and a pre-heat treatment stage is further included between the color-retaining stage and the water washing stage.
2. 在前述項目1中，前述事前熱處理階段，進行熱處理成單位體積5～75cm3 的偏光器形成用膜受到0.1～500Kcal的熱量。2. In the above item 1, in the pre-heat treatment stage, the film for forming a polarizer which is heat-treated to a unit volume of 5 to 75 cm 3 is subjected to heat of 0.1 to 500 Kcal.
3. 在前述項目1中，前述事前熱處理階段施加照射紅外線於偏光器形成用膜。3. In the above item 1, the infrared ray is applied to the film for forming a polarizer in the pre-heat treatment stage.
4. 在前述項目3中，前述紅外線波長為1～5μm。4. In the above item 3, the infrared ray wavelength is 1 to 5 μm.
5. 在前述項目1中，在前述乾燥階段，進行成單位體積5～75cm3 的偏光器形成用膜受到0.1～500Kcal的熱量。5. In the above item 1, in the drying step, the film for forming a polarizer having a unit volume of 5 to 75 cm 3 is subjected to heat of 0.1 to 500 Kcal.
6. 在前述項目5中，在前述乾燥階段，照射波長1～5μm的紅外線。6. In the above item 5, infrared rays having a wavelength of 1 to 5 μm are irradiated in the drying step.
7. 在前述項目5中，在前述乾燥階段，偏光器形成用薄膜的表面溫度為50～100℃。7. In the above item 5, in the drying stage, the surface temperature of the film for forming a polarizer is 50 to 100 °C.
8. 一種偏光器製造方法，包含潤脹、染色、延伸、交聯、補色、水洗及乾燥階段，前述補色階段與水洗階段之間更包含事前熱處理階段，在前述事前熱處理階段及乾燥階段，分別施加照射波長1～5μm的紅外線使單位體積5～75cm3 的偏光器形成用膜受到0.1～500Kcal的熱量。8. A method for manufacturing a polarizer, comprising a stage of swelling, dyeing, stretching, cross-linking, complementary color, water washing and drying, wherein the pre-heat treatment stage and the water washing stage further comprise a pre-heat treatment stage, in the foregoing pre-heat treatment stage and the drying stage, respectively The infrared ray having an irradiation wavelength of 1 to 5 μm is applied to a film for forming a polarizer having a unit volume of 5 to 75 cm 3 to receive heat of 0.1 to 500 Kcal.
發明效果
本發明因大量包含含有I3
錯合物，垂直b值高，所以可製造色感優良，染色不均勻性減少，具有改善的偏光度的偏光器。又，藉此，製造時可以更充分地水洗偏光器形成用膜，所以可製造殘存異物少的偏光器。Advantageous Effects of Invention Since the present invention contains a large amount of I 3 complex and has a high vertical b value, it is possible to produce a polarizer which is excellent in color feeling, has reduced dye unevenness, and has an improved degree of polarization. Moreover, since the film for forming a polarizer can be washed more fully at the time of manufacture, it is possible to manufacture a polarizer having a small amount of foreign matter remaining.
又，本發明因大量包含含有I5 錯合物，所以可製造具有改善的耐熱性，抑制在耐熱條件下產生的紅變現象，收縮力低的偏光器。 Further, since the present invention contains a large amount of the I 5 complex, it is possible to produce a polarizer which has improved heat resistance, suppresses red deformation under heat-resistant conditions, and has low shrinkage force.
本發明是關於一種偏光器製造方法，藉由包含潤脹、染色、延伸、交聯、補色、水洗及乾燥階段，前述補色階段與水洗階段之間更包含事前熱處理階段，可製造大量包含含有I3 錯合物，垂直b值高，染色不均勻性減少，具有改善的偏光度的偏光器。The invention relates to a method for manufacturing a polarizer, which comprises a step of swelling, dyeing, stretching, cross-linking, complementary color, water washing and drying, and further comprises a pre-heat treatment stage between the color-retaining stage and the water-washing stage, and can manufacture a large amount of containing I. 3 complex, a high vertical b value, reduced dyeing unevenness, and a polarizer with improved polarization.
以下，更詳細說明本發明。Hereinafter, the present invention will be described in more detail.
本發明的偏光器製造方法，包含潤脹、染色、延伸、交聯、補色、水洗及乾燥階段，補色階段與水洗階段之間更包含事前熱處理階段。在未偏離本發明目的的情況下，各階段的重複次數、工序條件等並沒有特別限定。延伸階段可單獨施加，潤脹、染色及交聯階段內也可以同時施加一個以上的階段。The method for manufacturing a polarizer of the present invention comprises a stage of swelling, dyeing, stretching, cross-linking, complementary color, water washing and drying, and a pre-heat treatment stage is further included between the complementary color stage and the water washing stage. The number of repetitions of each stage, the process conditions, and the like are not particularly limited, without departing from the object of the present invention. The extension phase can be applied separately, and more than one stage can be applied simultaneously during the swelling, dyeing and crosslinking stages.
延伸方法代表性地列舉乾式延伸、濕式延伸或前述兩種類的延伸方法混合的混合延伸等，但以下以濕式延伸，在各階段中同時進行延伸的情況做為一例，來說明本發明的偏光器製造方法，但並非受限於此。前述階段內，除了事前熱處理及乾燥階段以外剩下的階段是在恆溫水槽（bath）內浸漬偏光器形成用膜的狀態下進行。The stretching method typically exemplifies a dry stretching, a wet stretching, or a mixing extension in which the above two types of stretching methods are mixed, but the following is a case where the stretching is performed at the same time in each stage by wet stretching, and the present invention is explained as an example. The method of manufacturing the polarizer, but is not limited thereto. In the above-described stage, the remaining stage except the pre-heat treatment and the drying stage is carried out in a state where the film for forming a polarizer is immersed in a constant temperature water bath.
偏光器形成用膜
偏光器形成用膜是二色性物質，即若是可以碘等染色的膜，其種類沒有特別限定，可列舉例如聚乙烯醇膜、部分皂化的聚乙烯醇膜；聚乙烯對苯二甲酸酯膜、乙烯-乙酸乙烯酯共聚物膜、乙烯-乙烯醇共聚物膜、纖維素膜、這些的部分皂化膜等親水性聚合物膜；或已脫水處理的聚乙烯醇系膜、已脫氯化氫處理的聚乙烯醇系膜等的多烯定向膜等。這些之中，由於強化面內偏光度的均勻性的效果優良，對碘的染色親和性也優良，較佳為聚乙烯醇系膜。The film for forming a polarizer for polarizer formation is a dichroic material, that is, a film which can be dyed with iodine or the like, and the type thereof is not particularly limited, and examples thereof include a polyvinyl alcohol film and a partially saponified polyvinyl alcohol film; a hydrophilic polymer film such as a phthalate film, an ethylene-vinyl acetate copolymer film, an ethylene-vinyl alcohol copolymer film, a cellulose film, or a partially saponified film thereof; or a dehydrated polyvinyl alcohol film A polyene oriented film or the like which has been subjected to a dehydrochlorination-treated polyvinyl alcohol-based film or the like. Among these, the effect of enhancing the uniformity of the in-plane degree of polarization is excellent, and the dyeing affinity for iodine is also excellent, and a polyvinyl alcohol-based film is preferable.
偏光器形成用膜的厚度並沒有特別限定，例如5～100μm，較佳為20～80μm。The thickness of the film for forming a polarizer is not particularly limited, and is, for example, 5 to 100 μm, or preferably 20 to 80 μm.
＜潤脹階段＞
潤脹階段是將未延伸的偏光器形成用膜在染色前，浸漬於以潤脹用水溶液充滿潤脹槽，除去偏光器形成用膜的表面上所堆積的如塵埃或防阻隔劑的不純物，使偏光器形成用膜潤脹，提昇延伸效率並防止染色不均勻性的，用來提昇偏光器物性的階段。<Running stage>
In the swelling stage, the unstretched film for forming a polarizer is immersed in a swelling tank filled with an aqueous solution for swelling before dyeing, and impurities such as dust or a barrier agent deposited on the surface of the film for forming a polarizer are removed. The stage for improving the physical properties of the polarizer by swelling the film for forming a polarizer, improving the elongation efficiency, and preventing the dye unevenness.
在潤脹用水溶液，通常單獨使用水（純淨、去離子水），也可以添加少量的甘油或碘化鉀。在這種情況下，可以與高分子膜的潤脹一起提昇加工性。In the aqueous solution for swelling, water (pure, deionized water) is usually used alone, and a small amount of glycerin or potassium iodide may also be added. In this case, workability can be improved together with the swelling of the polymer film.
甘油及碘化鉀的含量並沒有特別限定，但例如可在潤脹用水溶液的總重量中分別佔5重量％以下、10重量％以下。The content of glycerin and potassium iodide is not particularly limited, and may be, for example, 5% by weight or less and 10% by weight or less based on the total weight of the aqueous solution for swelling.
潤脹槽的溫度並沒有特別限定，例如0～60℃，較佳為10～50℃。潤脹槽的溫度在前述範圍內的情況下，之後的延伸及染色效率優良，可防止因過渡潤脹導致的膜膨脹。The temperature of the swelling tank is not particularly limited, and is, for example, 0 to 60 ° C, preferably 10 to 50 ° C. When the temperature of the swelling tank is within the above range, the subsequent stretching and dyeing efficiency are excellent, and film expansion due to transitional swelling can be prevented.
＜染色階段＞
染色階段是使偏光器形成用膜浸漬於以二色性物質例如包含碘的染色液所充滿的染色槽來使偏光器形成用膜吸附碘的階段。<dyeing stage>
In the dyeing stage, the film for forming a polarizer is immersed in a dyeing tank filled with a dichroic substance such as a dyeing liquid containing iodine, and the film for forming a polarizer adsorbs iodine.
染色液可以更包含水、水溶性有機溶劑或這些的混合溶劑及碘。碘的濃度也可以在染色液中0.4～400mmol/L，較佳為0.8～275mmol/L，更佳為1～200mmol/L。The dyeing liquid may further contain water, a water-soluble organic solvent or a mixed solvent of these and iodine. The concentration of iodine may be 0.4 to 400 mmol/L, preferably 0.8 to 275 mmol/L, more preferably 1 to 200 mmol/L in the dyeing solution.
為了改善染色效率，染色液也可以更包含碘化合物做為溶解輔助劑。In order to improve the dyeing efficiency, the dyeing liquid may further contain an iodine compound as a dissolution aid.
碘化物種類並沒有特別限定，可列舉例如碘化鉀、碘化鋰、碘化鈉、碘化鋅、碘化鋁、碘化鉛、碘化銅、碘化鋇、碘化鈣、碘化錫、碘化鈦等，以對水溶解度大的點，碘化鉀為較佳。這些可單獨使用或混合兩種以上使用。The type of the iodide is not particularly limited, and examples thereof include potassium iodide, lithium iodide, sodium iodide, zinc iodide, aluminum iodide, lead iodide, copper iodide, cesium iodide, calcium iodide, tin iodide, and iodine. Titanium iodide or the like is preferable because potassium iodide is preferable at a point where water solubility is large. These may be used alone or in combination of two or more.
前述碘化物含量並沒有特別限定，也可以是例如在染色液總重量中佔0.01～10重量％，較佳為0.1～5重量％。The iodide content is not particularly limited, and may be, for example, 0.01 to 10% by weight, preferably 0.1 to 5% by weight based on the total weight of the dyeing liquid.
本發明的染色階段所使用的染色液可以更包含硼酸化合物。前述染色溶液可藉由包含硼酸化合物在施行交聯反應前提高硼酸化合物的停留時間，在偏光器形成用膜增加二色性物質的錯合物形成率。藉此，可提昇偏光器的顏色耐久性，改善偏光度。The dyeing liquid used in the dyeing stage of the present invention may further contain a boric acid compound. The dyeing solution can increase the residence time of the boric acid compound by including the boric acid compound before the crosslinking reaction, and increase the complex formation rate of the dichroic substance in the film for forming a polarizer. Thereby, the color durability of the polarizer can be improved, and the degree of polarization can be improved.
前述染色液內的硼酸化合物濃度並沒有特別限定，但例如在染色液總重量中佔0.1～5重量％，較佳為0.3～3重量％。染色液內的硼酸化合物濃度未滿0.1重量％的情況下，增加碘錯合物的效果降低，超過5重量％的情況下，會有應力上昇導致產生切斷的狀況。The concentration of the boric acid compound in the dyeing liquid is not particularly limited, but it is, for example, 0.1 to 5% by weight, preferably 0.3 to 3% by weight based on the total weight of the dyeing liquid. When the concentration of the boric acid compound in the dyeing liquid is less than 0.1% by weight, the effect of increasing the iodine complex is lowered, and when it exceeds 5% by weight, the stress is increased and the cutting is caused.
前述硼酸化合物的種類並沒有特別限定，例如前述硼酸化合物列舉硼酸、硼酸鈉、硼酸鉀及硼酸鋰等，較佳可為硼酸。這些可單獨使用或混合兩種以上使用。The type of the boric acid compound is not particularly limited. For example, the boric acid compound may be boric acid, sodium borate, potassium borate or lithium borate, and preferably boric acid. These may be used alone or in combination of two or more.
染色槽的溫度並沒有特別限定，也可以是例如5～42℃，較佳為10～35℃。The temperature of the dyeing tank is not particularly limited, and may be, for example, 5 to 42 ° C, preferably 10 to 35 ° C.
浸漬在染色層的偏光器形成用膜的時間並沒有特別限定，例如1～20分，較佳為2～10分。The time for immersing the film for polarizer formation in the dye layer is not particularly limited, and is, for example, 1 to 20 minutes, preferably 2 to 10 minutes.
染色階段與延伸階段可以同時施行，在此情況下，延伸比可為1.01～2.0倍，較佳為1.1～1.8倍。The dyeing stage and the stretching stage can be carried out simultaneously, and in this case, the stretching ratio can be 1.01 to 2.0 times, preferably 1.1 to 1.8 times.
又，到潤脹及延伸階段的偏光器累積延伸比，較佳為1.2～4.0倍。前述累積延伸比未滿1.2倍的情況下，膜會有產生皺褶的情況，超過4.0倍的情況下，會有初始光學特性低落之虞。Further, the cumulative elongation ratio of the polarizer to the swelling and stretching stage is preferably 1.2 to 4.0 times. When the cumulative stretching ratio is less than 1.2 times, wrinkles may occur in the film, and when it exceeds 4.0 times, the initial optical characteristics may be lowered.
＜交聯階段＞
交聯階段是使已染色的偏光器形成用膜浸漬於交聯液並使吸附的碘分子固定成使因物理吸附的碘分子影響的染色性不因外部環境降低的階段。<Crosslinking stage>
In the crosslinking step, the dyed polarizer forming film is immersed in the cross-linking liquid, and the adsorbed iodine molecules are fixed so that the dyeability due to the physically adsorbed iodine molecules is not lowered by the external environment.
用於本發明的交聯階段的交聯液包含硼酸化合物。前述交聯液因包含硼酸化合物，可提昇交聯效率，抑制工序中的皺褶產生，形成二色性物質的定向，提昇光學特性。The cross-linking liquid used in the crosslinking stage of the present invention contains a boric acid compound. Since the cross-linking liquid contains a boric acid compound, the crosslinking efficiency can be improved, the wrinkles in the process can be suppressed, the orientation of the dichroic substance can be formed, and the optical characteristics can be improved.
雖然二色性染料很少在耐濕環境溶出，但碘在交聯反應不穩定的情況下，多半會因環境溶解或昇華碘分子，所以要求充分的交聯反應。Although dichroic dyes are rarely eluted in a moisture-resistant environment, in the case where the crosslinking reaction is unstable, iodine is likely to dissolve or sublimate iodine molecules due to the environment, so a sufficient crosslinking reaction is required.
本發明的交聯階段可在第一交聯階段與第二交聯階段施加，前述交聯階段中，可包含有硼酸化合物在使用於一個以上的階段的交聯液。The crosslinking step of the present invention may be applied in a first crosslinking stage and a second crosslinking stage, and the crosslinking stage may include a crosslinking liquid in which the boric acid compound is used in one or more stages.
前述交聯液內的硼酸化合物濃度可以是1～4.5重量％，較佳為1.5～3.8重量％。交聯液內的硼酸化合物濃度未滿1重量％時偏光度會降低，超過4.5重量％的情況下會有收縮力提高的問題。The concentration of the boric acid compound in the cross-linking liquid may be 1 to 4.5% by weight, preferably 1.5 to 3.8% by weight. When the concentration of the boric acid compound in the cross-linking liquid is less than 1% by weight, the degree of polarization is lowered, and when it exceeds 4.5% by weight, the shrinkage force is increased.
硼酸化合物可使用與染色階段所使用者相同。The boric acid compound can be used in the same manner as the user of the dyeing stage.
本發明的交聯液可包含做為溶劑的水以及可與水相互溶解的有機溶劑，為了防止在偏光器面內的偏光度均勻性與已染上的碘的脫離，更可以包含少量的碘化鉀。The cross-linking liquid of the present invention may comprise water as a solvent and an organic solvent which is mutually soluble with water, and may further contain a small amount of potassium iodide in order to prevent detachment of the polarized light in the plane of the polarizer from the iodine which has been dyed. .
前述交聯液內的碘化鉀濃度為1～15重量％，較佳為5～11重量％。交聯液內的碘化鉀濃度未滿1重量％則偏光度降低，超過15重量％則耐熱性降低，長時間暴露在高溫下會產生紅變現象。The potassium iodide concentration in the cross-linking liquid is 1 to 15% by weight, preferably 5 to 11% by weight. When the concentration of potassium iodide in the cross-linking liquid is less than 1% by weight, the degree of polarization is lowered. When the concentration exceeds 15% by weight, the heat resistance is lowered, and when exposed to a high temperature for a long period of time, redness is caused.
除此之外，交聯液在不損害本發明目的的範圍內，更可包含前述碘。Besides, the cross-linking liquid may further contain the aforementioned iodine within the range not impairing the object of the present invention.
交聯槽的溫度並沒有特別限定，但例如20～70℃，較佳為40～60℃。The temperature of the crosslinking tank is not particularly limited, but is, for example, 20 to 70 ° C, preferably 40 to 60 ° C.
浸漬偏光器形成用膜於交聯槽的時間並沒有特別限定，可以是例如1秒～15分，較佳為5秒到10分。The time for immersing the film for forming a polarizer in the crosslinking groove is not particularly limited, and may be, for example, 1 second to 15 minutes, preferably 5 seconds to 10 minutes.
交聯階段與延伸階段可以一起施行，在此情況下，第一交聯階段的延伸比為1.4～3.0倍，較佳為1.5～2.5倍。又，第二交聯階段的延伸比也可以是1.01～2.0倍，較佳為1.2～1.8倍。The crosslinking step and the stretching step can be carried out together. In this case, the stretching ratio of the first crosslinking step is 1.4 to 3.0 times, preferably 1.5 to 2.5 times. Further, the elongation ratio in the second crosslinking step may be 1.01 to 2.0 times, preferably 1.2 to 1.8 times.
前述第一交聯階段與第二交聯階段的累積延伸比可以1.5～5.0倍，較佳為1.7～4.5倍。前述累積延伸比未滿1.5倍時，會有交聯效率上昇效果不存在的可能性，超過5.0倍則因過度延伸產生膜破損斷裂，有降低生產效率性的可能性。The cumulative elongation ratio of the first crosslinking stage and the second crosslinking stage may be 1.5 to 5.0 times, preferably 1.7 to 4.5 times. When the cumulative elongation ratio is less than 1.5 times, there is a possibility that the effect of increasing the crosslinking efficiency does not occur. When the cumulative stretching ratio exceeds 5.0 times, film breakage occurs due to excessive stretching, and there is a possibility that productivity is lowered.
＜補色階段＞
補色階段是在交聯階段使不足的碘分子追加地固定的階段。<Complementary phase>
The complementary color stage is a stage in which insufficient iodine molecules are additionally fixed in the crosslinking stage.
本發明的補色階段所使用的補色液，包含硼酸化合物。前述補色液因包含硼酸化合物，可提升交聯效率，抑制在工程中產生的膜皺褶，使二色性物質的定向形成，提高光學特性。The complementary color liquid used in the complementary color stage of the present invention contains a boric acid compound. Since the above-mentioned complementary color liquid contains a boric acid compound, the crosslinking efficiency can be improved, the film wrinkles generated in the process can be suppressed, the orientation of the dichroic substance can be formed, and the optical characteristics can be improved.
雖然二色性染料很少在耐濕環境溶出，但碘在交聯反應不穩定的情況下，多半會因環境溶解或昇華碘分子，所以要求充分的交聯反應。Although dichroic dyes are rarely eluted in a moisture-resistant environment, in the case where the crosslinking reaction is unstable, iodine is likely to dissolve or sublimate iodine molecules due to the environment, so a sufficient crosslinking reaction is required.
前述補色液內的硼酸化合物濃度可以是0.5～3重量％，較佳為1～2.5重量％。補色液內的硼酸化合物濃度未滿0.5重量％時偏光度會降低，超過3重量％的情況下會產生收縮力提高的問題。The concentration of the boric acid compound in the color correction liquid may be 0.5 to 3% by weight, preferably 1 to 2.5% by weight. When the concentration of the boric acid compound in the color correction liquid is less than 0.5% by weight, the degree of polarization is lowered, and when it exceeds 3% by weight, the problem of an increase in shrinkage force occurs.
硼酸化合物可使用與染色階段所使用者相同。The boric acid compound can be used in the same manner as the user of the dyeing stage.
本發明的補色液可包含做為溶劑的水以及可與水相互溶解的有機溶劑，為了防止在偏光器面內的偏光度均勻性與已染上的碘的脫離，更可以包含少量的碘化鉀。The complementary color liquid of the present invention may contain water as a solvent and an organic solvent which is mutually soluble with water, and may contain a small amount of potassium iodide in order to prevent detachment of the degree of polarization in the plane of the polarizer from the iodine which has been stained.
前述補色液內的碘化鉀濃度為1～15重量％，較佳為5～11重量％。補色液內的碘化鉀濃度未滿1重量％則偏光度降低，超過15重量％則耐熱性降低，長時間暴露在高溫下會產生紅變現象。The potassium iodide concentration in the color correction liquid is 1 to 15% by weight, preferably 5 to 11% by weight. When the concentration of potassium iodide in the color correction liquid is less than 1% by weight, the degree of polarization is lowered. When the concentration is more than 15% by weight, the heat resistance is lowered, and when exposed to a high temperature for a long period of time, redness is caused.
除此之外，補色液在不損害本發明目的的範圍內，更可包含前述碘化物。In addition to this, the complementary color liquid may further contain the aforementioned iodide within a range not impairing the object of the present invention.
補色槽的溫度並沒有特別限定，但例如20～70℃，較佳為40～60℃。The temperature of the complementary color tank is not particularly limited, but is, for example, 20 to 70 ° C, preferably 40 to 60 ° C.
浸漬偏光器形成用膜於補色槽的時間並沒有特別限定，可以是例如1秒～15分，較佳為5秒到10分。The time for immersing the film for forming a polarizer in the complementary color groove is not particularly limited, and may be, for example, 1 second to 15 minutes, preferably 5 seconds to 10 minutes.
補色階段與延伸階段可以一起施行，在此情況下，補色階段的延伸比為1～1.15倍，較佳為1.01～1.1倍。The complementary color stage and the extension stage can be carried out together, and in this case, the extension ratio of the complementary color stage is from 1 to 1.15 times, preferably from 1.01 to 1.1 times.
前述補色階段的累積延伸比可以1.5～7倍，較佳為1.7～6倍。前述累積延伸比未滿1.5倍時，補色效率上昇效果降低，超過7倍則因過度延伸產生膜破損斷裂，生產效率降低。The cumulative extension ratio of the aforementioned color complementing step may be 1.5 to 7 times, preferably 1.7 to 6 times. When the cumulative stretching ratio is less than 1.5 times, the effect of increasing the complementary color efficiency is lowered. When the cumulative stretching ratio is less than 7 times, the film is broken and broken due to excessive stretching, and the production efficiency is lowered.
＜事前熱處理階段＞
事前熱處理階段是在補色階段與水洗階段之間進行。<Pre-heat treatment stage>
The pre-heat treatment stage is carried out between the complementary color stage and the water washing stage.
事前熱處理階段是更促進追加的硼酸交聯（高分子的分子內交聯增加），在偏光器形成用膜內使碘錯合物空間的形成增加，使偏光器形成用膜的高分子（例如聚乙烯醇）-I3 錯合物量增加的階段。藉此，可使垂直b值提升，改善顏色，抑制染色皺褶，改善偏光度。雖然也可確保後述的水洗階段的水洗裕度（margin），但關於此將在後具體地陳述。In the pre-heat treatment stage, the additional boric acid cross-linking (intramolecular cross-linking of the polymer) is further promoted, and the formation of the iodine complex space is increased in the film for forming a polarizer, and the polymer of the film for forming a polarizer is obtained (for example). The stage in which the amount of polyvinyl alcohol)-I 3 complex is increased. Thereby, the vertical b value can be increased, the color can be improved, the dyeing wrinkles can be suppressed, and the degree of polarization can be improved. Although the water washing margin of the water washing stage described later can also be secured, it will be specifically described later.
在事前熱處理階段的加熱方法並沒有特別限定，雖然可使用自然乾燥、加熱乾燥、微波乾燥、熱風乾燥、紅外線照射等公知方法，但紅外線照射方法因前述交聯促進導致色、染色皺褶、偏光度等改善的觀點來看為較佳。The heating method in the heat treatment stage is not particularly limited, and a known method such as natural drying, heat drying, microwave drying, hot air drying, or infrared irradiation may be used. However, the infrared irradiation method causes color, dyeing wrinkles, and polarized light due to the crosslinking promotion. It is preferable to improve the degree of improvement.
事前熱處理階段為施行例如單位體積5～75cm3 的偏光器形成用膜受到0.1～500Kcal的熱量。前述單位體積的偏光器形成用膜所接受的熱量未滿0.1Kcal的情況下，硼酸交聯提升與顏色改善效果會變少，超過500Kcal的情況，成為偏光器形成用膜的黃變原因。前述偏光器形成用膜所接受的熱量，可藉由變更熱處理溫度、與熱源的距離、輸出、熱源波長、熱處理時間等來調整，但並非受限於此。In the pre-heat treatment stage, for example, a film for forming a polarizer having a unit volume of 5 to 75 cm 3 is subjected to heat of 0.1 to 500 Kcal. When the heat received by the film for forming a polarizer per unit volume is less than 0.1 Kcal, the effect of improving the crosslinking of boric acid and the color is small, and when it exceeds 500 Kcal, it becomes a cause of yellowing of the film for forming a polarizer. The heat received by the polarizer forming film can be adjusted by changing the heat treatment temperature, the distance from the heat source, the output, the heat source wavelength, the heat treatment time, and the like, but is not limited thereto.
事前熱處理階段的執行時間並沒有特別限定，例如0.1～10分，較佳為0.1～5分，更佳為0.1～1分。The execution time of the pre-heat treatment stage is not particularly limited, and is, for example, 0.1 to 10 minutes, preferably 0.1 to 5 minutes, more preferably 0.1 to 1 minute.
在事前熱處理階段照射紅外線來執行的情況紅外線波長為1～5μm。在紅外線波長未滿1μm的情況下，硼酸交聯提升與顏色改善效果會變少，在超過5μm的情況下，誘發偏光器形成用膜的黃變。從硼酸交聯提升效果與黃變抑制的觀點來看，更佳為1.5～3μm。In the case where the infrared ray is irradiated in the prior heat treatment stage, the infrared ray wavelength is 1 to 5 μm. When the infrared wavelength is less than 1 μm, the effect of improving the cross-linking of boric acid and the color is small, and when it exceeds 5 μm, the yellowing of the film for forming a polarizer is induced. From the viewpoint of the effect of promoting the crosslinking of boric acid and the inhibition of yellowing, it is more preferably 1.5 to 3 μm.
＜水洗階段＞
水洗階段是將交聯與延伸結束的偏光器形成用膜浸漬於以水洗用水溶液充滿的水洗槽，將在以前的階段附著於偏光器形成用膜的硼酸等不必要的殘留物除去的階段。<washing stage>
In the water-washing stage, the membrane for forming a polarizer which has been subjected to crosslinking and stretching is immersed in a washing tank filled with an aqueous solution for washing, and the unnecessary residue such as boric acid adhered to the film for forming a polarizer in the previous stage is removed.
水洗用水溶液也可以是水（去離子水），也有進一步添加碘化物於此的狀況。可使用相同於在染色階段所使用者做為碘化物，在這些之中碘化鈉或碘化鉀為較佳。碘化物含量並沒有特別限定，例如水洗用水溶液的總重量之中佔0.1～10重量份，較佳為3～8重量份。The aqueous solution for water washing may be water (deionized water) or may be further added with iodide. The same can be used as the iodide in the dyeing stage, among which sodium iodide or potassium iodide is preferred. The iodide content is not particularly limited, and is, for example, 0.1 to 10 parts by weight, preferably 3 to 8 parts by weight, based on the total weight of the aqueous solution for washing.
水洗槽的溫度並沒有特別限定，例如5～60℃，較佳為8～40℃。The temperature of the washing tank is not particularly limited, and is, for example, 5 to 60 ° C, preferably 8 to 40 ° C.
當偏光器形成用膜長時間暴露於水中，則高分子（例如聚乙烯醇）-I3 錯合物過剩轉換為高分子-I5 錯合物，藉此，會產生垂直b值的降低或顏色變化等問題。通常，在偏光器製造時，為了減少含有I3 錯合物的損失，在短時間內進行水洗，水洗後在偏光器形成用膜上會有殘存異物的情況。When the film for forming a polarizer is exposed to water for a long period of time, the polymer (for example, polyvinyl alcohol)-I 3 complex is excessively converted into a polymer-I 5 complex, whereby a vertical b value is lowered or Problems such as color changes. In general, in the production of a polarizer, in order to reduce the loss of the I 3 complex, the water is washed in a short time, and the foreign matter may remain on the film for forming a polarizer after washing with water.
但是，本發明的偏光器製造方法的情況下，以前述的事前熱處理增加含有I3 錯合物，所以相較於以往，可更充分地水洗偏光器形成用膜。因此，可製造具有更少量的異物的偏光器。However, in the case of the method for producing a polarizer of the present invention, since the I 3 complex is contained in the above-described pretreatment heat treatment, the film for polarizer formation can be more sufficiently washed than in the related art. Therefore, a polarizer having a smaller amount of foreign matter can be manufactured.
水洗階段可以在每當被稱為染色階段、交聯階段或延伸階段的以前階段結束時施行。又，也可以重覆一次以上，其重複次數並沒有特別限制。The water washing stage can be performed at the end of each of the previous stages known as the dyeing stage, the crosslinking stage or the extension stage. Further, it may be repeated more than once, and the number of repetitions is not particularly limited.
＜乾燥階段＞
乾燥階段是當使已水洗的偏光器形成用膜乾燥，進一步提升同時染上的碘分子的定向，所以使光學特性優良，賦予耐久性的工序。<drying stage>
In the drying step, the film for forming a polarizer for water washing is dried, and the orientation of the iodine molecules dyed at the same time is further enhanced, so that the optical characteristics are excellent and the durability is imparted.
在乾燥階段的加熱方法並沒有特別限定，雖然可使用自然乾燥、加熱乾燥、微波乾燥、熱風乾燥、紅外線照射等公知方法，但較佳為可在加熱條件下施行照射紅外線。The heating method in the drying stage is not particularly limited, and a known method such as natural drying, heat drying, microwave drying, hot air drying, or infrared irradiation can be used. However, it is preferred to irradiate infrared rays under heating.
在照射紅外線的情況下，更促進追加的硼酸交聯（高分子的分子內交聯增加），在偏光器形成用膜內使碘錯合物空間的形成增加，獲得使偏光器形成用膜的高分子（例如聚乙烯醇）-I5 錯合物量增加的效果。藉此，耐熱信賴性改善，改善在耐熱條件下產生紅變。When the infrared ray is irradiated, the additional boric acid cross-linking is increased (the intramolecular cross-linking of the polymer is increased), and the formation of the iodine complex space is increased in the film for forming a polarizer, and the film for forming a polarizer is obtained. The effect of increasing the amount of a polymer (for example, polyvinyl alcohol)-I 5 complex. Thereby, heat resistance reliability is improved, and redness is caused under heat-resistant conditions.
又，藉由最大化在偏光器製造時執行的延伸所產生的膜內部應力的消除效果，可使偏光器的收縮力降低並使耐久性增加。Further, by maximizing the effect of eliminating the internal stress of the film generated by the stretching performed at the time of manufacture of the polarizer, the contraction force of the polarizer can be lowered and the durability can be increased.
做為本發明的較佳實施例，紅外線波長為1～5μm。在紅外線波長未滿1μm的情況下，硼酸交聯提升與顏色改善效果會變少，若超過5μm會誘發偏光器形成用膜的黃變。又，在前述範圍內也獲得優良的偏光度改善效果。從硼酸交聯提升效果、黃變抑制以及偏光度改善的觀點來看，更佳為1.5～3μm。As a preferred embodiment of the present invention, the infrared wavelength is 1 to 5 μm. When the infrared wavelength is less than 1 μm, the effect of improving the cross-linking of boric acid and the color is small, and if it exceeds 5 μm, the yellowing of the film for forming a polarizer is induced. Further, an excellent polarization improvement effect is also obtained within the above range. From the viewpoint of boric acid crosslinking enhancement effect, yellowing inhibition, and improvement in polarizing degree, it is more preferably 1.5 to 3 μm.
乾燥階段可施行成例如單位體積5～75cm3 的偏光器形成用膜受到0.1～500Kcal的熱量。若前述單位體積的偏光器形成用膜所接受的熱量未滿0.1Kcal，硼酸交聯提升與顏色改善效果會變少，若超過500Kcal，則產生偏光器形成用膜的黃變。前述偏光器形成用膜所接受的熱量，可藉由變更熱處理溫度、與熱源的距離、輸出、熱源波長、熱處理時間等來調整，但並非受限於此。In the drying stage, for example, a film for forming a polarizer having a unit volume of 5 to 75 cm 3 is subjected to heat of 0.1 to 500 Kcal. When the heat received by the film for forming a polarizer per unit volume is less than 0.1 Kcal, the effect of improving the cross-linking of boric acid and the color is small, and if it exceeds 500 Kcal, yellowing of the film for forming a polarizer occurs. The heat received by the polarizer forming film can be adjusted by changing the heat treatment temperature, the distance from the heat source, the output, the heat source wavelength, the heat treatment time, and the like, but is not limited thereto.
乾燥階段的處理溫度並沒有特別限定，例如60～120℃。乾燥階段進行例如30秒～5分間，但並非受限於此。The treatment temperature in the drying stage is not particularly limited, and is, for example, 60 to 120 °C. The drying stage is carried out, for example, for 30 seconds to 5 minutes, but is not limited thereto.
已乾燥的偏光器形成用膜的表面溫度較佳為可最大程度地消除內部應力的溫度，例如50～100℃。在前述範圍內可進一步防止膜高分子的惡化並優化內部應力的減少效果。若膜溫度未滿50℃則內部應力消除效果變少，若成為100℃以上則膜會惡化。The surface temperature of the dried film for polarizer formation is preferably a temperature at which internal stress can be most eliminated, for example, 50 to 100 °C. Within the foregoing range, the deterioration of the film polymer can be further prevented and the effect of reducing the internal stress can be optimized. When the film temperature is less than 50 ° C, the internal stress relieving effect is small, and when it is 100 ° C or more, the film is deteriorated.
以下為了更容易理解本發明，表示了較佳實施例，但這些實施例只不過是例示，並非限制附帶的申請專利範圍，在本發明的範圍及技術思想的範圍內，可對實施例進行許多變更及修正，是所屬領域中具有通常知識者所明瞭，如此變更及修正當然屬於附帶的申請專利範圍。In the following, in order to facilitate the understanding of the present invention, the preferred embodiments are illustrated, but the embodiments are merely illustrative and are not intended to limit the scope of the appended claims. Changes and modifications are apparent to those of ordinary skill in the art, and such changes and modifications are of course included in the scope of the appended claims.
實施例1
在25℃的水（去離子水）浸漬縱及橫100cm，厚30μm，皂化度99.9％以上的透明未延伸聚乙烯醇膜（PE60、平均聚合度2400、KURARAY CO.,LTD）1分20秒並使其潤脹後，浸漬在包含碘1.25mM/L與碘化鉀1.25重量％、硼酸0.3重量％的30℃染色用水溶液2分30秒來染色。此時，在潤脹及染色階段，分別以1.56倍、1.64倍的延伸比來延伸，延伸成到染色槽為止的累積延伸比為2.56倍。Example 1
A transparent unstretched polyvinyl alcohol film (PE60, average polymerization degree 2400, KURARAY CO., LTD) having a vertical and horizontal 100 cm, a thickness of 30 μm, and a saponification degree of 99.9% or more was immersed in water (deionized water) at 25 ° C for 1 minute and 20 seconds. After swelling, it was immersed in an aqueous solution containing 30 ml of iodine containing 1.25 mM/L of iodine and 1.25 wt% of potassium iodide and 0.3% by weight of boric acid for 2 minutes and 30 seconds. At this time, in the swelling and dyeing stages, the stretching ratio was extended by 1.56 times and 1.64 times, respectively, and the cumulative stretching ratio until the dyeing tank was extended to 2.56 times.
接下來，在包含碘化鉀11重量％、硼酸2重量％的59℃交聯用水溶液浸漬26秒（第一交聯階段）來使其交聯並以1.7倍的延伸比延伸。之後，在包含碘化鉀11重量％、硼酸2重量％的59℃交聯用水溶液浸漬20秒（第二交聯階段）來使其交聯並以1.34倍的延伸比延伸。接下來，在補色階段，在在包含碘化鉀5重量％、硼酸1重量％的50℃補色用水溶液浸漬10秒並延伸以1.01倍。此時，潤脹、染色、交聯及補色階段的總累積延伸比為6倍。Next, it was immersed in an aqueous solution for crosslinking at 59 ° C containing 11% by weight of potassium iodide and 2% by weight of boric acid for 26 seconds (first crosslinking step) to be crosslinked and extended at an elongation ratio of 1.7 times. Thereafter, the mixture was impregnated with an aqueous solution of cross-linking at 59° C. containing 11% by weight of potassium iodide and 2% by weight of boric acid for 20 seconds (second crosslinking step) to be crosslinked and extended at an extension ratio of 1.34 times. Next, in the color-compensation stage, it was immersed for 10 seconds in an aqueous solution containing 50% by weight of potassium iodide and 1% by weight of boric acid, and extended to 1.01 times. At this time, the total cumulative elongation ratio of the swelling, dyeing, cross-linking, and complementary color stages was 6 times.
補色階段結束後，進行事前熱處理，事前熱處理結束後，在6℃水溶液進行7秒水洗，除去附著於偏光器表面的異物。水洗結束後，使偏光器乾燥，製造低收縮偏光器。After the completion of the color-compensation stage, the heat treatment was performed in advance, and after the heat treatment was completed, the aqueous solution was washed with water at 6 ° C for 7 seconds to remove foreign matter adhering to the surface of the polarizer. After the completion of the washing, the polarizer was dried to produce a low-contraction polarizer.
做為遠紅外線（IR）加熱器，使用Heraeus公司的Twin Tube透明石英玻璃製的紅外線加熱器，使用快速響應中波（Fast Response Medium Wave，1.5μm燈）與中波（Medium Wave，2.5μm燈）的波長。As a far-infrared (IR) heater, use Heraeus's Twin Tube transparent quartz glass infrared heater, using Fast Response Medium Wave (1.5μm lamp) and Medium Wave (Medium Wave, 2.5μm lamp) The wavelength of ).
實施例2～16以及比較例1～5
除了變更下述表1所示的事前熱處理、乾燥條件以外，以與實施例1相同的方法製造偏光器。Examples 2 to 16 and Comparative Examples 1 to 5
A polarizer was produced in the same manner as in Example 1 except that the pre-heat treatment and drying conditions shown in Table 1 below were changed.
表1Table 1
實驗例
1.透光率及垂直b的測量
在實施例及比較例所製造的偏光器切斷成4cmx4cm大小後，使用紫光可見光線分光計（V-7100、JASCO公司）來測量透光率與垂直b。通常，垂直b值為-1.0以下的情況，觀察到染色皺褶。Experimental example
1. Measurement of light transmittance and vertical b After the polarizers manufactured in the examples and the comparative examples were cut into a size of 4 cm x 4 cm, a violet visible light spectrometer (V-7100, JASCO) was used to measure the light transmittance and the vertical b. . Generally, in the case where the vertical b value is -1.0 or less, dyeing wrinkles are observed.
2.偏光度測量
在實施例及比較例所製造的偏光器切斷成4cmx4cm大小後，使用紫光可見光線分光計（V-7100、JASCO公司）來測量透光率。此時，偏光度是以下述數學式1所定義。
[數學式1]
偏光度（P）=［（T1
－T2
）／（T1
＋T2
）］1 ／ 2
（式中，T1
是在吸收軸平行的狀態下配置一對偏光器時所獲得的平行透光率，T2
是在吸收軸垂直的狀態下配置一對偏光器時所獲得的垂直透光率。）2. Polarization Measurement After the polarizers manufactured in the examples and the comparative examples were cut into a size of 4 cm x 4 cm, the transmittance was measured using a violet visible light spectrometer (V-7100, JASCO). At this time, the degree of polarization is defined by the following mathematical formula 1.
[Math 1]
Polarization (P) = [(T 1 - T 2 ) / (T 1 + T 2 )] 1 / 2
(wherein T 1 is a parallel light transmittance obtained when a pair of polarizers are arranged in a state where the absorption axes are parallel, and T 2 is a vertical light transmittance obtained when a pair of polarizers are arranged in a state where the absorption axis is perpendicular. rate.)
作為參考，需要注意到，即使偏光度在約0.001的差，對於對比度有很大的影響。若偏光度未滿99.990，對比度降低，具體實現全黑（real black）會變得困難。For reference, it should be noted that even if the degree of polarization is about 0.001, there is a large influence on contrast. If the degree of polarization is less than 99.990, the contrast is lowered, and it is difficult to realize real black.
3.A700測量
測量在實施例及比較例所製造的偏光器的以下述數學式2所定義的A700。
[數學式2]
A700＝－Log10
｛（TMD,700
ＸTTF,700
）／10000｝
（式中，TMD,700
是在吸收軸平行狀態下配置一對偏光板時所獲得的在700nm波長的平行透光率，TTD,700
是在吸收軸垂直狀態下配置一對偏光板時所獲得的在700nm波長的垂直透光率。）3. A700 Measurement A700 of the polarizer manufactured in the examples and the comparative examples, which is defined by the following Mathematical Formula 2, was measured.
[Math 2]
A700=-Log 10 {(T MD,700 XT TF,700 )/10000}
(wherein, T MD, 700 is a parallel light transmittance at a wavelength of 700 nm obtained when a pair of polarizing plates are arranged in a state in which the absorption axis is parallel, and T TD, 700 is a case where a pair of polarizing plates are arranged in a state where the absorption axis is perpendicular. The obtained vertical transmittance at a wavelength of 700 nm.)
4.收縮力測量
在實施例及比較例所製造的偏光器切斷成3.0cmx2mm大小後，用DMA Q800（動態機械分析儀（Dynamic mechanical analyzer），TA儀器公司）測量收縮力。此時，在測量前維持偏光器在拉緊狀態，使用最低限度的預負載（Pre-load）來測量。4. Contraction force measurement After the polarizer manufactured in the examples and the comparative examples was cut into a size of 3.0 cm x 2 mm, the contraction force was measured with a DMA Q800 (Dynamic mechanical analyzer, TA Instruments). At this time, the polarizer is maintained in tension before measurement, and is measured using a minimum preload (Pre-load).
5.確認有無黃變產生
以肉眼觀察在實施例及比較例所製造的偏光器，確認有無產生黃色。
○：未產生黃變
△：偏光器的一部分區域產生黃變
Ｘ：偏光器所有區域產生黃變5. Confirmation of the presence or absence of yellowing The polarizers manufactured in the examples and the comparative examples were visually observed to confirm the presence or absence of yellow color.
○: No yellowing occurred △: Yellowing occurred in a part of the polarizer X: Yellowing occurred in all areas of the polarizer
表2Table 2
參照前述表2，實施例的偏光器係垂直b值高，不產生染色皺褶，偏光度提高。特別是在乾燥階段進行紅外線照射的實施例8、9、10及12的情況，確認A700值大，偏光器收縮力低。但是，比較例的偏光器因為垂直b值低，所以會產生染色皺褶。Referring to Table 2 above, the polarizer of the embodiment has a high vertical b value, does not cause dyeing wrinkles, and has a high degree of polarization. In particular, in the cases of Examples 8, 9, 10, and 12 in which infrared irradiation was performed in the drying stage, it was confirmed that the A700 value was large and the polarizer contraction force was low. However, in the polarizer of the comparative example, since the vertical b value is low, dyeing wrinkles are generated.
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| KR20170053037A (en) * | 2015-11-05 | 2017-05-15 | 스미또모 가가꾸 가부시키가이샤 | Polarizer and method of preparing the same |
| JP7030447B2 (en) * | 2016-08-18 | 2022-03-07 | 住友化学株式会社 | Method and equipment for manufacturing polarizing film |
| TWI746615B (en) * | 2016-08-18 | 2021-11-21 | 日商住友化學股份有限公司 | Method for manufacturing polarizing film, manufacturing apparatus and polarizing film |
| TWI659989B (en) * | 2017-05-23 | 2019-05-21 | 住華科技股份有限公司 | Method for manufacturing a polarizer film |
| TWI782046B (en) * | 2017-07-03 | 2022-11-01 | 日商住友化學股份有限公司 | Method and apparatus for manufacturing polarizing film |
| TWI748108B (en) * | 2017-09-13 | 2021-12-01 | 日商日東電工股份有限公司 | Polarizing film, polarizing plate, and manufacturing method of polarizing film |
| TWI743373B (en) * | 2017-09-13 | 2021-10-21 | 日商日東電工股份有限公司 | Polarizing film, polarizing plate, and manufacturing method of polarizing film |
| JP6470456B1 (en) * | 2017-09-13 | 2019-02-13 | 日東電工株式会社 | Polarizing film, polarizing plate, and manufacturing method of polarizing film |
| JP6470457B1 (en) * | 2017-09-13 | 2019-02-13 | 日東電工株式会社 | Polarizing film, polarizing plate, and manufacturing method of polarizing film |
| TWI749242B (en) * | 2017-09-13 | 2021-12-11 | 日商日東電工股份有限公司 | Polarizing film, polarizing plate, and manufacturing method of polarizing film |
| JP6470455B1 (en) * | 2017-09-13 | 2019-02-13 | 日東電工株式会社 | Polarizing film, polarizing plate, and manufacturing method of polarizing film |
| JP2019066751A (en) * | 2017-10-04 | 2019-04-25 | 日本合成化学工業株式会社 | Method of manufacturing polarizing film |
| CN108469698A (en) * | 2018-04-10 | 2018-08-31 | 信利半导体有限公司 | A kind of liquid crystal display die set is bonded production method entirely |
| JP6496862B2 (en) * | 2018-05-01 | 2019-04-10 | 日東電工株式会社 | Manufacturing method of polarizing film |
| KR102536728B1 (en) * | 2018-10-15 | 2023-05-26 | 닛토덴코 가부시키가이샤 | Polarizing plate with phase difference layer, and image display device using this |
| JP6890160B2 (en) * | 2018-10-15 | 2021-06-18 | 日東電工株式会社 | Polarizing plate with retardation layer and image display device using it |
| WO2020080173A1 (en) * | 2018-10-15 | 2020-04-23 | 日東電工株式会社 | Polarizing plate with phase difference layer, and image display device using this |
| JP6890162B2 (en) * | 2018-10-15 | 2021-06-18 | 日東電工株式会社 | Polarizing plate with retardation layer and image display device using it |
| JP6890161B2 (en) * | 2018-10-15 | 2021-06-18 | 日東電工株式会社 | Polarizing plate with retardation layer and image display device using it |
| KR20200091741A (en) * | 2019-01-23 | 2020-07-31 | 동우 화인켐 주식회사 | Polarizer and method of manufacturing the same |
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