JPS62226104A - Production of polarizing film - Google Patents
Production of polarizing filmInfo
- Publication number
- JPS62226104A JPS62226104A JP6940586A JP6940586A JPS62226104A JP S62226104 A JPS62226104 A JP S62226104A JP 6940586 A JP6940586 A JP 6940586A JP 6940586 A JP6940586 A JP 6940586A JP S62226104 A JPS62226104 A JP S62226104A
- Authority
- JP
- Japan
- Prior art keywords
- film
- polarizing film
- polarizing
- durability
- inorg
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 14
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 14
- 229910052740 iodine Inorganic materials 0.000 claims abstract description 6
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000011630 iodine Substances 0.000 claims abstract description 5
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 claims description 12
- 239000007864 aqueous solution Substances 0.000 claims description 11
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 11
- 239000004327 boric acid Substances 0.000 claims description 11
- 239000000243 solution Substances 0.000 claims description 10
- 229910017053 inorganic salt Inorganic materials 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 4
- DKNPRRRKHAEUMW-UHFFFAOYSA-N Iodine aqueous Chemical compound [K+].I[I-]I DKNPRRRKHAEUMW-UHFFFAOYSA-N 0.000 claims description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 abstract description 7
- 239000000975 dye Substances 0.000 abstract description 5
- 229910052783 alkali metal Inorganic materials 0.000 abstract description 2
- 150000001340 alkali metals Chemical class 0.000 abstract description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 abstract description 2
- 150000001342 alkaline earth metals Chemical class 0.000 abstract description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 abstract description 2
- 235000011152 sodium sulphate Nutrition 0.000 abstract description 2
- 150000003839 salts Chemical class 0.000 abstract 4
- 235000019422 polyvinyl alcohol Nutrition 0.000 abstract 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract 1
- 238000000034 method Methods 0.000 description 12
- 230000010287 polarization Effects 0.000 description 7
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 6
- 238000002834 transmittance Methods 0.000 description 5
- 229920002284 Cellulose triacetate Polymers 0.000 description 4
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- AVERNFJXXRIVQN-XSDYUOFFSA-N 5-[(4-ethoxyphenyl)diazenyl]-2-[(e)-2-[4-[(4-ethoxyphenyl)diazenyl]-2-sulfophenyl]ethenyl]benzenesulfonic acid Chemical compound C1=CC(OCC)=CC=C1N=NC(C=C1S(O)(=O)=O)=CC=C1\C=C\C1=CC=C(N=NC=2C=CC(OCC)=CC=2)C=C1S(O)(=O)=O AVERNFJXXRIVQN-XSDYUOFFSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- -1 formalin Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229920002978 Vinylon Polymers 0.000 description 1
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 150000003840 hydrochlorides Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ポリビニルア〃コー／Ｉ／またはその誘導体
からなる偏光膜の製造方法に関するものである０
〔従来の技術〕
従来の偏光膜は延伸配向したポリビニルアルコール又は
その誘導体に、ヨウ素や二色性染料を吸着せしめたのち
、５０℃以下のホルマリン等のアルデヒドを含む水溶液
又はホウ酸を含む水溶液で耐久化処理をおこなったのち
、その両面にセルロースアセテート系樹脂やアクリμ糸
樹脂からなる保護膜を貼合することにより作製している
のが一般的である◎
しかしながら、これらの方法によって得られた偏光膜も
、耐久性能および偏光性能という点ではまだ充分とは言
い難い０
耐久性能および偏光性能を向上させるために、ホルマリ
ン等のアルデヒドを含む水溶液、またはホウ酸を含む水
溶液で耐久化処理をおこなうに際し、５０℃以上の高温
で処理することによシ、偏光膜の耐久性が向上すると同
時に偏光性能が向上することが明らかになっている０（
特開昭６１−１８９０２、特開昭６１−２０００８ ）
しかしながら、５００以上の高温で処理するとそれ以下
の低温で処理した場合と比較してポリビニルアルコール
又はその誘導体フィルムの横方向の収縮が大きく（いわ
ゆるネックインが大きく）、広幅の偏光膜が得られがた
い０広幅の偏光膜を得るために、原反幅を広くする方法
が考えられるが、この方法では延伸ムラ、染色ムラ等が
今以上に生じやすく偏光膜の品質上問題があシ、良好な
方法ではない。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a polarizing film made of polyvinyl alcohol/I/or its derivatives. [Prior Art] A conventional polarizing film is After adsorbing iodine or dichroic dye to stretched and oriented polyvinyl alcohol or its derivatives, it is subjected to durability treatment with an aqueous solution containing an aldehyde such as formalin or an aqueous solution containing boric acid at a temperature of 50°C or less. It is generally produced by laminating a protective film made of cellulose acetate resin or acrylic μ-thread resin to the film. However, the polarizing films obtained by these methods also have poor durability and polarizing performance. In order to improve durability and polarization performance, when performing durability treatment with an aqueous solution containing aldehyde such as formalin, or an aqueous solution containing boric acid, treat at a high temperature of 50°C or higher. In particular, it has been shown that the durability of the polarizing film improves as well as the polarizing performance.
JP-A-61-18902, JP-A-61-20008)
However, when processed at a high temperature of 500°C or higher, the transverse shrinkage of the polyvinyl alcohol or its derivative film is larger (so-called neck-in is larger) than when processed at a lower temperature, making it difficult to obtain a wide polarizing film. In order to obtain a polarizing film with a wide width, it is possible to widen the width of the original fabric, but this method is more likely to cause uneven stretching, uneven dyeing, etc., and has problems with the quality of the polarizing film. Not the method.
本発明は、ポリビニルアルコール又はその誘導体からな
る偏光膜の耐久性能と偏光性能をおとすことなく、よシ
広幅の偏光膜を安定して製造する方法を提供することを
目的とするものである０
〔問題を解決するための手段〕
本発明者らは、上記目的を達成するためにポリビニルア
ルコ−〃又はその誘導体からなる偏光膜の耐久化処理工
程について鋭意検討したところ、耐久化処理液のなかに
無機塩を添加すると、偏光膜の耐久性と偏光性能をおと
すことなく横方向の収縮の小さい広幅の偏光膜を製造す
ることができることを見い出し、本発明に至ったもので
ある。An object of the present invention is to provide a method for stably manufacturing a polarizing film with a wider width without compromising the durability and polarization performance of a polarizing film made of polyvinyl alcohol or its derivatives. Means for Solving the Problem] In order to achieve the above object, the present inventors conducted extensive studies on the durability treatment process for polarizing films made of polyvinyl alcohol or its derivatives, and found that It was discovered that by adding an inorganic salt, a wide polarizing film with small lateral shrinkage can be produced without reducing the durability and polarizing performance of the polarizing film, leading to the present invention.
すなわち本発明は、よう素あるいは二色性染料等の偏光
素子を吸着・配向させたポリビニルア〃コー〃又はその
誘導体のフィルムからなる偏光膜を耐久化処理液で処理
する際して、耐久化処理液のなかに無機塩を添加したこ
とを特徴とする偏光膜の製造方法に関するものである〇
無機塩を添加するととＫよって横方向の収縮（ネックイ
ン）が軽減され、偏光膜の広幅化が達成されるものであ
る０耐久化処理温度は必ずしも限定されないが、５０〜
８０℃が好ましい０耐久化処理温度を５０℃〜８０℃と
すると、偏光膜の耐久性能と偏光性能が向上し、有効な
方法であるが、従来の処理方法では同時に横方向の収縮
も大になるので、このような場合には本発明は特に有用
となる〇
本発明において用いる無機塩は、アルカリ金属あるいは
アルカリ土類金属の硫酸塩、硝酸塩、塩酸塩等を一般的
に用いることが出来る０なかでも硫酸ナトリウムは特に
有用である。In other words, the present invention provides durability treatment when treating a polarizing film made of polyvinyl alcohol or its derivative film on which a polarizing element such as iodine or dichroic dye is adsorbed and oriented with a durability treatment solution. This relates to a method for manufacturing a polarizing film characterized by adding an inorganic salt to a processing solution. Adding an inorganic salt reduces lateral shrinkage (neck-in) and increases the width of the polarizing film. The temperature at which the 0 durability treatment is achieved is not necessarily limited, but is between 50 and
80°C is preferable 0 Setting the durability treatment temperature to 50°C to 80°C improves the durability and polarization performance of the polarizing film and is an effective method, but the conventional treatment method also causes large lateral shrinkage. Therefore, the present invention is particularly useful in such cases. The inorganic salt used in the present invention may generally include sulfates, nitrates, hydrochlorides, etc. of alkali metals or alkaline earth metals. Among them, sodium sulfate is particularly useful.
耐久化処理液のなかに用いる無機塩の濃度は１〜１５％
、好ましくは８〜ｌθ％程度である０１％以下の場合は
、横方向の収縮防止効果が少ないので好ましくない。The concentration of inorganic salt used in the durability treatment solution is 1 to 15%.
If it is less than 0.01%, which is preferably about 8 to lθ%, it is not preferable because the effect of preventing shrinkage in the lateral direction is small.
耐久化処理液としては、ホルマリン等のアルデヒドを含
む水溶液、ホウ酸を含む水溶液等が有効である。またこ
れらの耐久化処理液中によう素、又はよう化カリウム又
はよう素とよう化カリウム又は二色性染料を添加すると
さらに効果的である〇
従来、ポリビニルアルコール又はその誘導体フィルムの
延伸は、８０℃以下の低温で湿式法にて行なわれている
０高温で湿式延伸することも可能ではあるが、高温にす
れば水分によって分子間水素結合が切断され易くな）、
分子の運動性が増すために安定加工は容品ではなく延伸
ムラが生じ易くなるので好ましくない０したがって低温
での延伸を行なった後５０℃以上で耐久化処理を行なえ
ば、ネックインが大きく、延伸軸方向く割れが生じた）
、延伸軸と９０度をなす方向に切断し易くなるなどの問
題があシ安定的に耐久化処理を行なうことが困難であっ
た。As the durability treatment liquid, an aqueous solution containing an aldehyde such as formalin, an aqueous solution containing boric acid, etc. are effective. It is also more effective to add iodine, potassium iodide, iodine and potassium iodide, or a dichroic dye to these durable treatment solutions. Conventionally, polyvinyl alcohol or its derivative films have been stretched at 80% Although it is possible to carry out wet stretching at a high temperature (which is carried out in a wet method at a low temperature below ℃), intermolecular hydrogen bonds are likely to be broken by moisture at high temperatures).
Due to the increased mobility of molecules, stable processing is not desirable because it tends to result in uneven stretching, which is not desirable.0 Therefore, if durability treatment is performed at 50°C or higher after stretching at low temperature, neck-in will be large. Cracking occurred in the direction of the stretching axis)
However, it has been difficult to carry out durability treatment stably due to problems such as easy cutting in a direction that makes 90 degrees with the drawing axis.
しかしながら、本発明のように耐久化処理液のなかに無
機塩を添加して処理を行なえば５０℃以上の高温処理の
場合でもネックインが緩和されて、耐久化処理を安定的
に行なうことが可能となる＠
本発明者らは、先に乾式法にて２０℃以上１８０℃以下
の温度でポリビニルアルコール又はその誘導体の圧縮延
伸配向を延伸ムラなく安定的に行なえることを見出して
いる０（特開昭５７−２１２０２５号公報）本発明に用
いるよシ好ま温度で乾式法にて圧縮延伸を行なうことで
ある。However, if an inorganic salt is added to the durability treatment solution as in the present invention, neck-in can be alleviated even in high-temperature treatment of 50°C or higher, and the durability treatment can be performed stably. Possible @ The present inventors have previously discovered that compression stretching orientation of polyvinyl alcohol or its derivatives can be stably performed without stretching unevenness at a temperature of 20° C. or higher and 180° C. or lower using a dry method. (Japanese Unexamined Patent Publication No. 57-212025) Compression and stretching is carried out by a dry method at a temperature preferred for use in the present invention.
本発明によシ得られた偏光膜には、その片面あるいは両
面に光学的透視感のすぐれたフィルム、例えば三酢酸セ
ルロースのごときセルロース糸フィ〃ム、アクリｌｖ系
樹脂からなるフィルム、ポリエステル系樹脂からなるフ
ィルム等を設け、偏光板とすることができる◎
このように得られた偏光板は、液晶表示体の用途あるい
は各種光学用途に有用である〇〔実施例〕
以下実施例によυ本発明をさらにくわしく説明するが、
本発明はこれらに限定されるものではない。The polarizing film obtained according to the present invention may include a film having excellent optical transparency on one or both sides, such as a cellulose thread film such as cellulose triacetate, a film made of acrylic lv-based resin, or a polyester-based resin. ◎ The polarizing plate obtained in this way is useful for liquid crystal display applications or various optical applications. To explain the invention in more detail,
The present invention is not limited to these.
なお、本発明における偏光度とは偏光膜あるいは偏光板
を２枚準備しこの２枚の偏光板を重ね合せた状態で光線
透過率曲線を測定しく測定器：島津製作所ＵＶ−２１０
分光光度計）、以下の式によシ求めた値である◇
ここでＨ１＋は２枚のサンプルの重ね合せ時において偏
光膜の配向方向が同一方向になるよう重ね合せた状態で
測定した値（平行透過率と呼ばれている）であシ、Ｈ上
は２枚のサンプμの重ね合せ時において偏光膜の配向方
向が互いに直交する方向になるように重ね合せた状態で
測定した値（直交透過率と呼ばれている）である。なお
実施例・比較例に示す偏光度の値は４００ｎｍ〜７００
ｎｍの波長において１０μｍ毎の各波長における偏光度
を算出した後４００ ｎｍ〜７００ａｍにおける平均値
を記載した◎
実施例１
厚さ７５μのポリビニルアルコールフィルム（クラレビ
ニロＡｓｙ＋５ｏｏ）を縦−軸に１０５℃で４倍の延伸
を施こし偏光膜基材とした０このポリビニルアμコー／
Ｌ／４倍延伸フィルムを緊張状態に保ったままヨウ素１
０ｆ・ヨウ化カリウム１５０ｆ・水５ｓｏｏｔからなる
２８℃の液に約６０秒間浸漬した０さらにホウ酸１５０
ｆ・よう化カリウム７０Ｆ・無水芒硝１００ｆ水２００
０Ｆからなる６５℃の液に約８００秒間浸漬後、さらに
２０℃の水で洗浄を施こし偏光膜を得た〇
この偏光膜の横方向の収縮率は初期幅に対して約１４ｇ
６であった０この偏光膜の両面に市販のセルローストリ
アセテートフィルム（８０μ、富士写真フィルム社製）
をウレタン系接着剤を用いて貼合した０こうして得られ
た偏光板を６０℃−９０％ＲＨの恒温恒湿槽に９２時間
放置（耐湿テスト）シたのち、偏光性能を測定し、初期
性能からの低下度をみた０結果を第１表に示す。同様に
して他の偏光板を８０℃の熱風乾燥器内に２００時間放
置（耐熱テスト）シたのち、偏光性能を測定し、初期性
能からの低下度をみた口同じく結果を第１表に示す◇
比較例１
ホウ酸水溶液のなかに無水芒硝を添加しない以外は、実
施例１と全く同様ＩＣ５！施し、偏光−膜を得た。この
偏光膜の横方向の収縮率は初期幅に対して、約２６％で
あった０実施例１と同様にセルローストリアセテートフ
ィルムｔ−両面に貼合し、同一の耐久性試験を実施した
。結果を同じく第１表に示す。In addition, the degree of polarization in the present invention refers to preparing two polarizing films or plates and measuring the light transmittance curve with the two polarizing plates superimposed.Measuring device: Shimadzu UV-210
spectrophotometer), and is the value obtained using the following formula. ◇ Here, H1+ is the value measured when the two samples are stacked so that the polarizing films are aligned in the same direction ( Parallel transmittance (parallel transmittance) (also called transmittance). Note that the values of the degree of polarization shown in Examples and Comparative Examples are 400 nm to 700 nm.
After calculating the degree of polarization at each wavelength of 10 μm, the average value from 400 nm to 700 am was recorded. 0 This polyvinyl alcohol is double stretched and made into a polarizing film base material.
Iodine 1 is added to the L/4x stretched film while keeping it in tension.
0f, potassium iodide 150f, water 5soot immersed in a 28°C solution for about 60 seconds, and boric acid 150
f・Potassium iodide 70F・Anhydrous sodium sulfate 100F Water 200F
After being immersed in a 65°C solution consisting of 0F for about 800 seconds, the polarizing film was obtained by further washing with 20°C water.The horizontal shrinkage rate of this polarizing film was about 14g with respect to the initial width.
A commercially available cellulose triacetate film (80μ, manufactured by Fuji Photo Film Co., Ltd.) was coated on both sides of this polarizing film.
The polarizing plate obtained in this way was left in a constant temperature and humidity chamber at 60°C and 90% RH for 92 hours (humidity test), and then the polarizing performance was measured and the initial performance was determined. Table 1 shows the results of the degree of decrease from 0 to 0. In the same way, other polarizing plates were left in a hot air dryer at 80°C for 200 hours (heat resistance test), and then the polarizing performance was measured and the degree of deterioration from the initial performance was observed.The results are shown in Table 1. ◇ Comparative Example 1 Exactly the same as Example 1 except that anhydrous sodium sulfate was not added to the boric acid aqueous solution, IC5! A polarizing film was obtained. The shrinkage rate of this polarizing film in the lateral direction was about 26% with respect to the initial width.Similarly to Example 1, it was laminated on both sides of a cellulose triacetate film, and the same durability test was conducted. The results are also shown in Table 1.
比較例２
ホウ酸水溶液のなかに無水芒硝を添加しない仁と、およ
びホウ酸処理液の温度を４５℃にすること以外は、実施
例１と全く同様に実施し偏光膜を得た０この偏光膜の横
方向の収縮率は初期幅に対して約１８９６であった０実
施例１と同様にセルローストリアセテートフィルムを両
面に貼合し、同一の附久性試験を実施した。結果を同じ
く第１表に示す。Comparative Example 2 A polarizing film was obtained in exactly the same manner as in Example 1, except that anhydrous sodium sulfate was not added to the boric acid aqueous solution and the temperature of the boric acid treatment solution was set to 45°C. The transverse shrinkage ratio of the membrane was approximately 1896% relative to the initial width. Cellulose triacetate films were laminated on both sides in the same manner as in Example 1, and the same durability test was conducted. The results are also shown in Table 1.
実施例２
厚さ７５μのポリビニルアルコールフィルム（クラレビ
ニロン■＃７５００ ） ヲｋ −軸Ｋ ４ 倍の延伸
を施し、偏光膜基材とした。このＰｖＡフイ〜ムを緊張
状態に保ったまま、！種類の染料、ジャパノール ファ
ースト プフック Ｄ コーンク（Ｊａｐａｎｏｌ Ｆ
ａｓｔ Ｂｌａｃｋ Ｄ ｃｏｎｅ ＝ｍｍカッーイン
デックス ジェネリック ネーム（Ｃ，１，Ｇ＠ｎ＠ｒ
１ｃＮａｍｅ ）で表わして、シー、アイ、ダイレクト
グラツク１７）、クリソフェニン（Ｃｈｒｙｓｏｐｈ＠
ｎ１ｎｅ・・・・・ シー、アイ、ダイレクト イエロ
ー１２）、Ｓｕｐｒａ Ｂｌｕｅ ｌ Ｇ Ｓ ｓｅａ
シー、アイ、ダイレフトープ／Ｌ／−２０２）、いずれ
も住友化学工業製を、各々０．０８ ｗｔ＊、 ０．
０６ ｖｔ＊、２．５ ｗｔ優および無水芒硝７． Ｏ
ｗｔ％からなる６０℃の水溶液に１０分間浸漬した０さ
らにホウ酸７．５ｗｔ％および無水芒硝５ｖｔ９６から
なる６５℃の水溶液に６分間浸漬後、２０℃の水で８０
秒間浸漬をおこない偏光膜を得た。この偏光膜の横方向
の収縮率は初期幅に対して約１５９６であった。またこ
の偏光膜の性能は単体透過率４１％、偏光度９２９６で
あった◎
比較例３
ホウ酸水溶液のなかに無水芒硝を添加しない以外は、寮
旅例２と全く同様に来施し、偏光膜を得ｆｃｏこの偏光
膜の横方向の初期幅に対する収縮率は約２６％であった
◇またこの偏光膜の性能は、宍施例２の場合と同一であ
った〇第 １ 表Example 2 A polyvinyl alcohol film (Kuraray Vinylon ■#7500) having a thickness of 75 μm was stretched 4 times on the axis K and was used as a polarizing film base material. While keeping this PvA film in a tense state! Types of dyes, Japanol F
ast Black D cone =mm index generic name (C, 1, G@n@r
Chrysophenine (Chrysoph@
n1ne... sea, eye, direct yellow 12), Supra Blue l G S sea
C, I, Daileftope/L/-202), all manufactured by Sumitomo Chemical, 0.08 wt*, 0.
06 vt*, 2.5 wt excellent and anhydrous mirabilite7. O
After immersing for 10 minutes in a 60°C aqueous solution consisting of 7.5 wt% boric acid and 5vt96 of anhydrous sodium sulfate,
A polarizing film was obtained by dipping for a second. The lateral shrinkage rate of this polarizing film was about 1596 points with respect to the initial width. The performance of this polarizing film was 41% in single transmittance and a polarization degree of 9296.◎ Comparative Example 3 The polarizing film was applied in exactly the same manner as in Example 2 except that anhydrous sodium sulfate was not added to the boric acid aqueous solution. The shrinkage rate of this polarizing film with respect to the initial width in the lateral direction was approximately 26% ◇ Also, the performance of this polarizing film was the same as in Shishi Example 2 〇Table 1
Claims (1)
ルまたはその誘導体のフィルムからなる偏光膜を耐久化
処理液で処理するに際して、耐久化処理液のなかに無機
塩を添加することを特徴とする偏光膜の製造法。 （２）耐久化処理液が５０℃以上８０℃以下の温度範囲
にあるホウ酸水溶液である特許請求の範囲第１項記載の
偏光膜の製造法。 （８）耐久化処理液がよう素又はよう化カリウム又はよ
う素とよう化カリウム又は二色性染料を添加した５０℃
以上８０℃以下の温度範囲にあるホウ酸水溶液である特
許請求の範囲第１項記載の偏光膜の製造法。 （４）ポリビニルアルコール又はその誘導体のフィルム
が５０℃以上１８０℃以下の温度範囲にある対をなす加
圧ロールにより、一軸方向に圧縮延伸処理されたもので
ある特許請求の範囲第１項記載の偏光膜の製造法。[Claims] (1) When treating a polarizing film made of a film of polyvinyl alcohol or its derivatives with a polarizing element adsorbed and oriented with a durable treatment liquid, an inorganic salt is added to the durable treatment liquid. A method for producing a polarizing film characterized by: (2) The method for producing a polarizing film according to claim 1, wherein the durability treatment liquid is an aqueous boric acid solution having a temperature range of 50°C or higher and 80°C or lower. (8) 50°C where the durability treatment solution added iodine or potassium iodide or iodine and potassium iodide or dichroic dye
The method for producing a polarizing film according to claim 1, wherein the boric acid aqueous solution is in a temperature range of 80° C. or higher. (4) A film of polyvinyl alcohol or a derivative thereof is uniaxially compressed and stretched by a pair of pressure rolls at a temperature range of 50°C or higher and 180°C or lower. Manufacturing method of polarizing film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61069405A JPH0823608B2 (en) | 1986-03-27 | 1986-03-27 | Polarizing film manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61069405A JPH0823608B2 (en) | 1986-03-27 | 1986-03-27 | Polarizing film manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62226104A true JPS62226104A (en) | 1987-10-05 |
| JPH0823608B2 JPH0823608B2 (en) | 1996-03-06 |
Family
ID=13401660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61069405A Expired - Fee Related JPH0823608B2 (en) | 1986-03-27 | 1986-03-27 | Polarizing film manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0823608B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63311203A (en) * | 1987-06-12 | 1988-12-20 | Mitsubishi Gas Chem Co Inc | Production of polarizing film |
| JPH01227101A (en) * | 1988-03-08 | 1989-09-11 | Toray Ind Inc | Polarizing film |
| JPH01227102A (en) * | 1988-03-08 | 1989-09-11 | Toray Ind Inc | Modified polarizing film |
| JPH02135402A (en) * | 1988-11-17 | 1990-05-24 | Nippon Synthetic Chem Ind Co Ltd:The | Production of polarizing plate |
| JPH02253204A (en) * | 1989-03-27 | 1990-10-12 | Nippon Synthetic Chem Ind Co Ltd:The | Production of polarizing film having superior durability |
| CN114474691A (en) * | 2022-01-18 | 2022-05-13 | 深圳市三利谱光电科技股份有限公司 | Method for producing polarizer and polarizing film |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6188187B2 (en) * | 2012-01-05 | 2017-08-30 | 日東電工株式会社 | Iodine polarizer, polarizing plate, optical film, and image display device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55126202A (en) * | 1979-03-20 | 1980-09-29 | Nitto Electric Ind Co Ltd | Polarizing film |
-
1986
- 1986-03-27 JP JP61069405A patent/JPH0823608B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55126202A (en) * | 1979-03-20 | 1980-09-29 | Nitto Electric Ind Co Ltd | Polarizing film |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63311203A (en) * | 1987-06-12 | 1988-12-20 | Mitsubishi Gas Chem Co Inc | Production of polarizing film |
| JPH01227101A (en) * | 1988-03-08 | 1989-09-11 | Toray Ind Inc | Polarizing film |
| JPH01227102A (en) * | 1988-03-08 | 1989-09-11 | Toray Ind Inc | Modified polarizing film |
| JPH0565842B2 (en) * | 1988-03-08 | 1993-09-20 | Toray Industries | |
| JPH0565843B2 (en) * | 1988-03-08 | 1993-09-20 | Toray Industries | |
| JPH02135402A (en) * | 1988-11-17 | 1990-05-24 | Nippon Synthetic Chem Ind Co Ltd:The | Production of polarizing plate |
| JPH02253204A (en) * | 1989-03-27 | 1990-10-12 | Nippon Synthetic Chem Ind Co Ltd:The | Production of polarizing film having superior durability |
| CN114474691A (en) * | 2022-01-18 | 2022-05-13 | 深圳市三利谱光电科技股份有限公司 | Method for producing polarizer and polarizing film |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0823608B2 (en) | 1996-03-06 |
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