JP2016532907A - Polarizing film manufacturing equipment - Google Patents
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- JP2016532907A JP2016532907A JP2016540823A JP2016540823A JP2016532907A JP 2016532907 A JP2016532907 A JP 2016532907A JP 2016540823 A JP2016540823 A JP 2016540823A JP 2016540823 A JP2016540823 A JP 2016540823A JP 2016532907 A JP2016532907 A JP 2016532907A
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- 238000004519 manufacturing process Methods 0.000 title description 23
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 claims abstract description 159
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims abstract description 107
- 229910052740 iodine Inorganic materials 0.000 claims abstract description 107
- 239000011630 iodine Substances 0.000 claims abstract description 107
- 238000004043 dyeing Methods 0.000 claims abstract description 66
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000004327 boric acid Substances 0.000 claims abstract description 36
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000010924 continuous production Methods 0.000 claims abstract description 8
- 239000007864 aqueous solution Substances 0.000 claims abstract description 7
- 229910052700 potassium Inorganic materials 0.000 claims abstract 2
- 239000011591 potassium Substances 0.000 claims abstract 2
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 62
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 62
- 230000000295 complement effect Effects 0.000 claims description 18
- 230000035699 permeability Effects 0.000 claims description 18
- 238000005406 washing Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 8
- 230000008961 swelling Effects 0.000 claims description 8
- 238000009792 diffusion process Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims 1
- -1 potassium halide Chemical class 0.000 abstract 1
- 238000002834 transmittance Methods 0.000 description 23
- 239000000243 solution Substances 0.000 description 16
- 239000000203 mixture Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- DKNPRRRKHAEUMW-UHFFFAOYSA-N Iodine aqueous Chemical compound [K+].I[I-]I DKNPRRRKHAEUMW-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 238000000611 regression analysis Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229920002284 Cellulose triacetate Polymers 0.000 description 1
- 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 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D21/00—Control of chemical or physico-chemical variables, e.g. pH value
- G05D21/02—Control of chemical or physico-chemical variables, e.g. pH value characterised by the use of electric means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00634—Production of filters
- B29D11/00644—Production of filters polarizing
-
- 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
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Health & Medical Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Ophthalmology & Optometry (AREA)
- Mechanical Engineering (AREA)
- Polarising Elements (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
本発明は、連続工程によって、基材フィルムにヨウ素、ヨウ化カリウムとホウ酸を染色して偏光特性を発揮するＰＶＡフィルム（偏光フィルム）を製造する装置であって、基材フィルムをヨウ素、ヨウ化カリウム及びホウ酸を含む水溶液に浸漬して染色し、前記ヨウ素が予め設定された範囲の低濃度に維持されている染着槽、及び前記染着槽の一側に備えられ、ヨウ素を連続的または断続的な点滴（ｄｒｏｐｐｉｎｇ）方式で投入する少なくとも１つのポンプを含んでおり、前記ポンプから離隔した染着槽の任意の地点で測定されたヨウ素濃度と、ヨウ素がポンプから投入される地点のヨウ素濃度との偏差に基づいて、前記任意の地点で測定されたヨウ素濃度が予め設定された範囲の低濃度に維持されるようにヨウ素の投入量を制御することを特徴とする装置を提供する。The present invention is an apparatus for producing a PVA film (polarizing film) that exhibits polarizing properties by dyeing iodine, potassium iodide, and boric acid on a base film by a continuous process. Dyeing by immersing in an aqueous solution containing potassium halide and boric acid, the iodine is maintained at a low concentration within a preset range, and provided on one side of the dyeing bath, iodine is continuously Including at least one pump that is charged in a continuous or intermittent dropping manner, the iodine concentration measured at any point in the dyeing tank remote from the pump, and the point where iodine is charged from the pump Based on the deviation from the iodine concentration, the amount of iodine input is controlled so that the iodine concentration measured at the arbitrary point is maintained at a low concentration within a preset range. Providing apparatus characterized.
Description
本発明は、偏光フィルムの製造装置に関する。 The present invention relates to a polarizing film manufacturing apparatus.
偏光板（Ｐｏｌａｒｉｚｉｎｇ Ｓｈｅｅｔ）または偏光フィルム（Ｐｏｌａｒｉｚｉｎｇ Ｆｉｌｍ）は、一般に自然光を偏光に変える機能を有しており、このような偏光機能は、偏光板に染着される材料によって具現される。一般に液晶ディスプレイは、偏光材料として、ヨウ素が染着されたヨウ素タイプの偏光フィルムを使用する。 A polarizing plate or a polarizing film generally has a function of converting natural light into polarized light, and such a polarizing function is realized by a material dyed on the polarizing plate. In general, a liquid crystal display uses an iodine type polarizing film dyed with iodine as a polarizing material.
ヨウ素タイプの偏光フィルムは、ポリビニルアルコール（ＰＶＡ）系列のフィルムを二色性ヨウ素または二色性染料などを用いて染色し、一軸延伸などの方法により一定の方向に配向させて製造し、ＬＣＤなどに多く使用される。例えば、非延伸ＰＶＡフィルムを水溶液中で一軸延伸した後、ヨウ素及びヨウ化カリウムを含有した溶液に浸漬（ｄｉｐｐｉｎｇ）したり、または非延伸ＰＶＡフィルムをヨウ素及びヨウ化カリウムを含有した溶液に浸漬した後、一軸延伸したり、または非延伸ＰＶＡフィルムをヨウ素及びヨウ化カリウムを含有した溶液中で一軸延伸したり、または非延伸ＰＶＡフィルムを乾燥状態で一軸延伸した後、ヨウ素及びヨウ化カリウムを含有した溶液に浸漬したりして偏光フィルムを製造する。 Iodine-type polarizing films are manufactured by dyeing polyvinyl alcohol (PVA) series films with dichroic iodine or dichroic dyes, etc., and orienting them in a certain direction by uniaxial stretching, etc. Used a lot. For example, the unstretched PVA film is uniaxially stretched in an aqueous solution and then dipped in a solution containing iodine and potassium iodide, or the unstretched PVA film is immersed in a solution containing iodine and potassium iodide. Thereafter, it is uniaxially stretched, or a non-stretched PVA film is uniaxially stretched in a solution containing iodine and potassium iodide, or a non-stretched PVA film is uniaxially stretched in a dry state and then contains iodine and potassium iodide. The polarizing film is manufactured by immersing in the solution.
ヨウ素が吸着及び配向されたＰＶＡフィルムを水洗浄や乾燥などの方法で後処理して偏光フィルムを収得し、収得された偏光フィルムの少なくとも一面以上に保護フィルムを積層すると、偏光板が得られる。 When a PVA film on which iodine is adsorbed and oriented is post-treated by a method such as washing with water or drying to obtain a polarizing film, and a protective film is laminated on at least one surface of the obtained polarizing film, a polarizing plate is obtained.
一方、前記のような偏光板の製造過程においてＰＶＡフィルムを交換する場合、試運転を通じて偏光フィルムを製造した後、前記偏光フィルムを切り取るなどの方法でサンプルを取って偏光フィルムの透過度を測定し、基準スペックと一致するように工程因子及び副原料を追加したり、希釈させたりする方法が広く使用されている。 On the other hand, when replacing the PVA film in the manufacturing process of the polarizing plate as described above, after manufacturing the polarizing film through a trial run, measure the transmittance of the polarizing film by taking a sample such as by cutting the polarizing film, A method of adding or diluting process factors and auxiliary materials so as to match the standard specifications is widely used.
しかし、上記のように試運転を通じて偏光フィルムを製造した後、透過度を測定する方法は、ＰＶＡフィルムの損失が多く、生産ラインの稼動が中断されるため、製造原価を上昇させるという問題がある。特に、偏光フィルムが、一般的に連続工程により製造されることを考慮すれば、透過度の測定のために、経験的な調節により透過度に大きく影響を及ぼすヨウ素を投入することによって、多量のヨウ素が消耗してしまい、高価のヨウ素溶液が大きく浪費されるという問題がある。 However, the method of measuring the transmittance after manufacturing the polarizing film through the trial operation as described above has a problem that the production cost is increased because the loss of the PVA film is large and the operation of the production line is interrupted. In particular, considering that the polarizing film is generally manufactured by a continuous process, a large amount of iodine can be measured by introducing iodine that greatly affects the transmittance by empirical adjustment for the measurement of the transmittance. There is a problem that iodine is consumed and an expensive iodine solution is largely wasted.
したがって、上記のような問題点を解決し、ＰＶＡの交換時にＰＶＡフィルムの材料損失及びヨウ素溶液の浪費を最小化することができる偏光フィルムの色相制御装置に対する技術が非常に必要な実情である。 Therefore, a technology for a hue control device for a polarizing film that can solve the above-described problems and can minimize material loss of the PVA film and waste of the iodine solution when the PVA is replaced is very necessary.
本発明は、上記のような従来技術の問題点及び過去から要請されてきた技術的課題を解決することを目的とする。 An object of the present invention is to solve the above-described problems of the prior art and technical problems that have been requested from the past.
本出願の発明者らは、鋭意研究と様々な実験を重ねた結果、染着槽のヨウ素、ヨウ化カリウとホウ酸濃度測定器、補色槽のヨウ化カリウム濃度測定器、及び素子オーブンと４段オーブンの温度測定器から測定された入力データの特性と、連続工程に投入されるＰＶＡフィルムの特性に対する情報に基づいて、偏光フィルムの主要因子として透過度を予測するために、前記染着槽のヨウ素濃度が予め設定された範囲の低濃度に維持されるようにヨウ素の投入量をリアルタイムで制御することによって、ＰＶＡフィルムの材料損失及びヨウ素溶液の使用を最小化することができることを見出し、本発明を完成するに至った。 The inventors of the present application have conducted extensive research and various experiments. As a result, iodine, potassium iodide and boric acid concentration measuring devices in the dyeing tank, potassium iodide concentration measuring device in the complementary color tank, and element oven 4 In order to predict the transmittance as the main factor of the polarizing film based on the characteristics of the input data measured from the temperature measuring device of the stage oven and the information on the characteristics of the PVA film put into the continuous process, the dyeing tank Finds that the loss of PVA film material and the use of iodine solution can be minimized by controlling the amount of iodine input in real time so that the iodine concentration is maintained at a low concentration within a preset range, The present invention has been completed.
したがって、本発明に係る装置は、連続工程によって、基材フィルムにヨウ素、ヨウ化カリウムとホウ酸を染色して偏光特性を発揮するＰＶＡフィルム（偏光フィルム）を製造する装置であって、
基材フィルムをヨウ素、ヨウ化カリウム及びホウ酸を含む水溶液に浸漬して染色し、前記ヨウ素が予め設定された範囲の低濃度に維持されている染着槽と、
前記染着槽の一側に備えられ、ヨウ素を連続的または断続的な点滴（ｄｒｏｐｐｉｎｇ）方式で投入する少なくとも１つのポンプと、
を含んでおり、
前記ポンプから離隔した染着槽の任意の地点で測定されたヨウ素濃度と、ヨウ素がポンプから投入される地点のヨウ素濃度との偏差に基づいて、前記任意の地点で測定されたヨウ素濃度が予め設定された範囲の低濃度に維持されるようにヨウ素の投入量を制御することを特徴とする装置からなることができる。
Therefore, the apparatus according to the present invention is an apparatus for producing a PVA film (polarizing film) that exhibits polarizing characteristics by dyeing iodine, potassium iodide and boric acid on a base film by a continuous process,
A dyeing tank in which the base film is immersed and dyed in an aqueous solution containing iodine, potassium iodide and boric acid, and the iodine is maintained at a low concentration within a preset range; and
At least one pump provided on one side of the dyeing tank for charging iodine in a continuous or intermittent dropping manner;
Contains
Based on the deviation between the iodine concentration measured at an arbitrary point of the dyeing tank separated from the pump and the iodine concentration at the point where iodine is charged from the pump, the iodine concentration measured at the arbitrary point is It can consist of the apparatus characterized by controlling the input amount of iodine so that it may be maintained in the low concentration of the set range.
一具体例において、前記ヨウ素の低濃度は、０．１ｐｐｍ〜１００ｐｐｍの範囲で設定されてもよく、好ましくは、前記ヨウ素の低濃度は、０．５ｐｐｍ〜５０ｐｐｍの範囲で設定されてもよい。 In one specific example, the low concentration of iodine may be set in a range of 0.1 ppm to 100 ppm, and preferably, the low concentration of iodine may be set in a range of 0.5 ppm to 50 ppm.
本発明によれば、前記ヨウ素の投入量は、予め設定された範囲の低濃度と、測定時点で染着槽のヨウ素濃度との偏差を反映した計算値または実験値の関数値によって決定され得る。前記偏差は、予め設定された低濃度の範囲での現在のヨウ素濃度と、測定時点の変化によるヨウ素濃度（Ｉ２）との間の交互作用による平均を考慮した値が反映される。ここで、交互作用とは、１つの因子の水準による従属変数の変化が、他の因子の水準によって異なって現れるとき、２つの因子間の相互作用が反映されるということを意味する。 According to the present invention, the input amount of iodine can be determined by a calculated value or a function value of an experimental value reflecting a deviation between a low concentration in a preset range and the iodine concentration in the dyeing tank at the time of measurement. . The deviation reflects a value in consideration of an average due to an interaction between a current iodine concentration in a preset low concentration range and an iodine concentration (I 2 ) due to a change in measurement time. Here, the interaction means that when the change of the dependent variable due to the level of one factor appears differently depending on the level of the other factor, the interaction between the two factors is reflected.
一例において、前記ポンプから離隔した染着槽の任意の地点は、染着槽の中央部位であってもよく、具体例において、前記ポンプから離隔した染着槽の任意の地点で測定されたヨウ素濃度と、ヨウ素がポンプから投入される地点のヨウ素濃度との偏差は、ヨウ素拡散の時間遅延（ｔｉｍｅ ｄｅｌａｙ）によって生じる構成であり得る。 In one example, the arbitrary point of the dyeing tank separated from the pump may be a central part of the dyeing tank, and in a specific example, iodine measured at an arbitrary point of the dyeing tank separated from the pump. The deviation between the concentration and the iodine concentration at the point where iodine is introduced from the pump can be a configuration caused by a time delay of iodine diffusion.
このような構造において、前記染着槽においてヨウ素の拡散速度は、０．０１ｍ／ｍｉｎ〜０．１０ｍ／ｍｉｎの範囲であってもよく、好ましくは、０．０４ｍ／ｍｉｎであってもよい。すなわち、本発明によれば、前記染着槽におけるヨウ素の拡散速度が偏光フィルムの透過度に影響を及ぼすので、前記ヨウ素の拡散速度を偏光フィルムの透過度入力モデルに反映することによって、ヨウ素投入量の調節を通じて、より正確な透過度の予測が可能である。 In such a structure, the diffusion rate of iodine in the dyeing tank may be in the range of 0.01 m / min to 0.10 m / min, and preferably 0.04 m / min. That is, according to the present invention, since the diffusion rate of iodine in the dyeing tank affects the transmittance of the polarizing film, the iodine input rate is reflected by reflecting the diffusion rate of iodine in the transmittance input model of the polarizing film. Through adjustment of the amount, it is possible to predict the transmission more accurately.
また、前記偏光フィルムは、前記染着槽で染着される過程において、前記染着槽内で２０ｍ／ｍｉｎ〜３５ｍ／ｍｉｎの速度で移動する構造であってもよい。 The polarizing film may have a structure that moves at a speed of 20 m / min to 35 m / min in the dyeing tank in the process of being dyed in the dyeing tank.
前記染着槽は、ヨウ素、ヨウ化カリウム及びホウ酸の濃度をそれぞれ測定するためのヨウ素濃度測定器、ヨウ化カリウム濃度測定器及びホウ酸濃度測定器を含む構造であってもよい。 The dyeing tank may have a structure including an iodine concentration measuring device, a potassium iodide concentration measuring device, and a boric acid concentration measuring device for measuring concentrations of iodine, potassium iodide, and boric acid, respectively.
一具体例において、前記装置は、
ヨウ素、ヨウ化カリウム及びホウ酸が染着されたＰＶＡフィルムをヨウ化カリウム水溶液に浸漬して染色する補色槽であって、ヨウ化カリウムの濃度を測定するためのヨウ化カリウム濃度測定器を備えている補色槽と、
ヨウ素、ヨウ化カリウム及びホウ酸が配向されたＰＶＡフィルムを乾燥する素子オーブンであって、素子オーブンの温度を測定するための素子オーブン温度測定器を備えている素子オーブンと、
前記染着槽及び／又は補色槽のヨウ素投入量を制御する中央制御部と、
をさらに含む構造であってもよい。
In one embodiment, the device is
A complementary color bath for immersing and dyeing a PVA film dyed with iodine, potassium iodide and boric acid in an aqueous solution of potassium iodide, comprising a potassium iodide concentration measuring device for measuring the concentration of potassium iodide A complementary color bath,
An element oven for drying a PVA film oriented with iodine, potassium iodide and boric acid, the element oven comprising an element oven temperature measuring device for measuring the temperature of the element oven;
A central control unit for controlling the iodine input amount of the dyeing tank and / or the complementary color tank;
May be included.
前記構造において、前記素子オーブンは、２つのオーブンで構成されている構造であってもよい。 In the above structure, the element oven may be composed of two ovens.
場合によって、前記素子オーブンで乾燥されたＰＶＡフィルムを乾燥する４段オーブンであって、４段オーブンの温度を測定するための４段オーブン測定器を備えている４段オーブンをさらに含む構造であってもよく、前記４段オーブンは、４つのオーブンで構成されている構造であってもよい。 According to circumstances, the structure further includes a four-stage oven for drying the PVA film dried in the element oven, and further including a four-stage oven measuring device for measuring the temperature of the four-stage oven. Alternatively, the four-stage oven may have a structure including four ovens.
一方、本発明によれば、前記ヨウ素投入量の制御による透過度の予測は、部分最小二乗法（Ｐａｒｔｉａｌ Ｌｅａｓｔ Ｓｑｕａｒｅｓ）に基づくＰＶＡフィルム透過度予測モデルによって達成することができる。 On the other hand, according to the present invention, the prediction of permeability by controlling the amount of iodine input can be achieved by a PVA film permeability prediction model based on a partial least squares method.
また、基材フィルムであるポリビニルアルコール（ＰＶＡ）フィルムを水洗する水洗槽、及びヨウ素、ヨウ化カリウム及びホウ酸が染着されたＰＶＡフィルムを延伸ローラによって延伸することで、染着されたヨウ素、ヨウ化カリウム及びホウ酸を配向させる延伸槽をさらに含む構造であってもよい。 In addition, a washing tank for washing a polyvinyl alcohol (PVA) film as a base film, and a dyed iodine by stretching a PVA film dyed with iodine, potassium iodide and boric acid by a stretching roller, The structure may further include a stretching tank for orienting potassium iodide and boric acid.
場合によって、前記ＰＶＡフィルムを膨潤させる膨潤槽、及び染着されたＰＶＡフィルムを洗浄する洗浄槽をさらに含む構造であってもよい。 Depending on the case, the structure may further include a swelling tank for swelling the PVA film and a washing tank for washing the dyed PVA film.
本発明はまた、前記装置を経て製造された偏光フィルムの上面及び下面にそれぞれ保護フィルムを付着して製造される偏光板を提供する。 The present invention also provides a polarizing plate produced by attaching protective films to the upper and lower surfaces of the polarizing film produced through the apparatus.
以下では、図面などを参照して本発明をより詳述するが、本発明の範疇がそれによって限定されるものではない。 Hereinafter, the present invention will be described in more detail with reference to the drawings and the like, but the scope of the present invention is not limited thereby.
図１には、本発明の一実施例に係る偏光フィルム製造装置の構成図が模式的に示されている。 FIG. 1 schematically shows a configuration diagram of a polarizing film manufacturing apparatus according to an embodiment of the present invention.
図１を参照すると、本発明に係る偏光フィルム製造装置９０は、水洗したＰＶＡフィルムをヨウ素水溶液とヨウ化カリウム水溶液に浸漬して染色する染着槽１０、ヨウ素、ヨウ化カリウムとホウ酸が染着されたＰＶＡフィルムをヨウ化カリウム水溶液に浸漬して染色する補色槽２０、ヨウ素、ヨウ化カリウムとホウ酸が配向されたＰＶＡフィルムを乾燥する素子オーブン３０、素子オーブンで乾燥されたＰＶＡフィルムを乾燥する４段オーブン４０、中央制御部６０の入力情報に基づいて素子オーブン３０及び４段オーブン４０の温度と染着槽１０及び補色槽２０に投入される組成物の投入量を補充する組成物供給装置５０、及び中央制御部６０で構成されている。 Referring to FIG. 1, a polarizing film manufacturing apparatus 90 according to the present invention includes a dyeing tank 10 for dyeing a washed PVA film by immersing it in an aqueous iodine solution and an aqueous potassium iodide solution, and dyeing iodine, potassium iodide and boric acid. A complementary color bath 20 for immersing and dyeing the attached PVA film in an aqueous potassium iodide solution, an element oven 30 for drying the PVA film oriented with iodine, potassium iodide and boric acid, and a PVA film dried in the element oven A composition for replenishing the temperature of the element oven 30 and the four-stage oven 40 and the amount of the composition to be charged into the dyeing tank 10 and the complementary color tank 20 based on the input information of the four-stage oven 40 and the central control unit 60 to be dried. A supply device 50 and a central control unit 60 are included.
したがって、ＰＶＡフィルムは、染着槽１０、補色槽２０、素子オーブン３０、及び４段オーブン４０を順次経て偏光フィルムとなる。 Therefore, the PVA film sequentially becomes a polarizing film through the dyeing tank 10, the complementary color tank 20, the element oven 30, and the four-stage oven 40.
染着槽１０には、ヨウ素、ヨウ化カリウムとホウ酸の濃度Ｃ１２，Ｃ１４を測定するためのヨウ素濃度測定器１２、ヨウ化カリウム濃度測定器１４及びホウ酸濃度測定器１６が設置されており、補色槽２０には、ヨウ化カリウムの濃度Ｃ２２を測定するためのヨウ化カリウム濃度測定器２２が設置されている。 The dyeing tank 10 is provided with an iodine concentration measuring device 12, a potassium iodide concentration measuring device 14, and a boric acid concentration measuring device 16 for measuring concentrations C12 and C14 of iodine, potassium iodide and boric acid. The complementary color tank 20 is provided with a potassium iodide concentration measuring device 22 for measuring the concentration C22 of potassium iodide.
また、２つのオーブンからなる素子オーブン３０と４つのオーブンからなる４段オーブン４０には、オーブンの温度Ｔ３２，Ｔ３４，Ｔ４２，Ｔ４４，Ｔ４６，Ｔ４８を測定するための２つの素子オーブン温度測定器３２，３４と４つの４段オーブン測定器４２，４４，４６，４８が設置されている。 The element oven 30 composed of two ovens and the four-stage oven 40 composed of four ovens include two element oven temperature measuring devices 32 for measuring oven temperatures T32, T34, T42, T44, T46, and T48. , 34 and four four-stage oven measuring instruments 42, 44, 46, 48 are installed.
中央制御部６０は、染着槽１０のヨウ素、ヨウ化カリウムとホウ酸濃度測定器１２、１４，１６、補色槽２０のヨウ化カリウム濃度測定器２２、及び素子オーブン３０と４段オーブン４０の温度測定器３２，３４，４２，４４，４６，４８から測定された入力データの特性と、連続工程に投入されるＰＶＡフィルムの特性に対する情報に基づいて、素子オーブン３０及び４段オーブン４０の温度と、染着槽１０及び補色槽２０に投入される組成物の投入量を制御している。 The central controller 60 includes iodine, potassium iodide and boric acid concentration measuring devices 12, 14 and 16 in the dyeing tank 10, a potassium iodide concentration measuring device 22 in the complementary color tank 20, and the element oven 30 and the four-stage oven 40. Based on the characteristics of the input data measured from the temperature measuring devices 32, 34, 42, 44, 46, and 48 and the information on the characteristics of the PVA film input to the continuous process, the temperature of the element oven 30 and the four-stage oven 40 The amount of the composition charged into the dyeing tank 10 and the complementary color tank 20 is controlled.
染着槽１０に投入される組成物はヨウ素、ヨウ化カリウム及びホウ酸であり、補色槽２０に投入される組成物はヨウ化カリウムである。さらに、中央制御部６０は、偏光フィルムの透過度を調節するために、染着槽１０のヨウ素濃度測定器１２を通じて、予め設定されたヨウ素の低濃度（０．５ｐｐｍ〜５０ｐｐｍ）を維持するためのヨウ素の投入量を決定して、組成物供給装置５０を介して投入するようにリアルタイムで制御している。 The composition charged into the dyeing tank 10 is iodine, potassium iodide and boric acid, and the composition charged into the complementary color tank 20 is potassium iodide. Further, the central control unit 60 maintains a preset low concentration of iodine (0.5 ppm to 50 ppm) through the iodine concentration measuring device 12 of the dyeing tank 10 in order to adjust the transmittance of the polarizing film. The amount of iodine is determined and controlled in real time so as to be charged via the composition supply device 50.
ＰＶＡフィルムの透過度の予測は、部分最小二乗法に基づくＰＶＡフィルム透過度モデルである多重回帰分析法によって達成される。 Prediction of PVA film permeability is achieved by multiple regression analysis, a PVA film permeability model based on the partial least squares method.
図２には、本発明の一実施例に係る偏光フィルム製造方法のフローチャートが模式的に示されている。 FIG. 2 schematically shows a flowchart of a method for producing a polarizing film according to an embodiment of the present invention.
図２を図１と共に参照すると、本発明に係る偏光フィルム製造方法９０２は、基材フィルムであるポリビニルアルコール（ＰＶＡ）フィルムを水洗する水洗段階１００と；水洗したＰＶＡフィルムを膨潤槽で膨潤させる膨潤段階２００と；水洗したＰＶＡフィルムをヨウ素水溶液とヨウ化カリウム水溶液が入っている染着槽１０に浸漬して染色し、ヨウ素濃度測定器１２とヨウ化カリウム濃度測定器１４が染着槽１０のヨウ素、ヨウ化カリウムとホウ酸の濃度を測定する染着段階３００と；染着されたＰＶＡフィルムを洗浄槽で洗浄する洗浄段階４００と；ヨウ素、ヨウ化カリウムとホウ酸が染着されたＰＶＡフィルムを延伸ローラによって延伸することで、染着されたヨウ素、ヨウ化カリウムとホウ酸を配向させる延伸段階５００と；ヨウ素、ヨウ化カリウムとホウ酸が染着されたＰＶＡフィルムをヨウ化カリウム水溶液が入っている補色槽２０に浸漬して染色し、ヨウ化カリウム濃度測定器２２が補色槽２０のヨウ化カリウムの濃度を測定する補色段階６００と；ヨウ素、ヨウ化カリウムとホウ酸が配向されたＰＶＡフィルムを素子オーブン３０で乾燥し、素子オーブン温度測定器３２，３４が素子オーブン３０の温度を測定する第１乾燥段階７００と；素子オーブン３０で乾燥されたＰＶＡフィルムを４段オーブン４０で乾燥し、４段オーブン測定器４２，４４，４６，４８が４段オーブン４０の温度を測定する第２乾燥段階８００と；中央制御部６０が、染着槽１０のヨウ素、ヨウ化カリウムとホウ酸濃度測定器１２，１４，１６、補色槽２０のヨウ化カリウム濃度測定器２２、及び素子オーブン３０と４段オーブン４０の温度測定器３２，３４，４２，４４，４６，４８から測定された入力データの特性と、連続工程に投入されるＰＶＡフィルムの特性に対する情報に基づいて、素子オーブン３０及び４段オーブン４０の温度と染着槽１０及び補色槽２０に投入される組成物の投入量を制御する制御段階９００と；で構成されている。 Referring to FIG. 2 together with FIG. 1, a polarizing film manufacturing method 902 according to the present invention includes a water washing step 100 for washing a polyvinyl alcohol (PVA) film as a base film, and a swelling for swelling the water washed PVA film in a swelling tank. Step 200; Dyeing the washed PVA film by immersing it in a dyeing tank 10 containing an aqueous iodine solution and an aqueous potassium iodide solution, and the iodine concentration measuring device 12 and the potassium iodide concentration measuring device 14 are A dyeing step 300 for measuring concentrations of iodine, potassium iodide and boric acid; a washing step 400 for washing the dyed PVA film in a washing tank; and a PVA dyed with iodine, potassium iodide and boric acid. A stretching step 500 for orienting the dyed iodine, potassium iodide and boric acid by stretching the film with a stretching roller; The PVA film dyed with potassium iodide and boric acid is immersed in a complementary color bath 20 containing a potassium iodide aqueous solution and dyed. A PVA film in which iodine, potassium iodide and boric acid are oriented is dried in the element oven 30, and the first oven temperature measuring devices 32 and 34 measure the temperature of the element oven 30. A second drying stage 800 in which the PVA film dried in the element oven 30 is dried in the four-stage oven 40, and the four-stage oven measuring devices 42, 44, 46, 48 measure the temperature of the four-stage oven 40; The central control unit 60 has iodine, potassium iodide and boric acid concentration measuring devices 12, 14, and 16 in the dyeing tank 10, and a potassium iodide concentration measuring device in the complementary color tank 20. 2 and information on the characteristics of the input data measured from the temperature measuring devices 32, 34, 42, 44, 46, and 48 of the element oven 30 and the four-stage oven 40 and the information on the characteristics of the PVA film to be put into the continuous process. And a control stage 900 for controlling the temperature of the element oven 30 and the four-stage oven 40 and the amount of the composition charged into the dyeing tank 10 and the complementary color tank 20.
染着段階３００において、ＰＶＡフィルムは、２０〜４０℃の温度のヨウ素、ヨウ化カリウムとホウ酸水溶液が入っている染着槽１０に浸漬して染色され、第１乾燥段階７００及び第２乾燥段階８００において、ＰＶＡフィルムは、４０〜６０℃の温度条件で素子オーブン３０及び４段オーブン４０で乾燥される。 In the dyeing stage 300, the PVA film is dyed by being immersed in a dyeing tank 10 containing iodine, potassium iodide and an aqueous boric acid solution at a temperature of 20 to 40 ° C., and the first drying stage 700 and the second drying stage. In step 800, the PVA film is dried in the element oven 30 and the four-stage oven 40 at a temperature condition of 40-60 ° C.
図３には、本発明の更に他の実施例に係る偏光フィルム製造装置の構成図が模式的に示されている。 The block diagram of the polarizing film manufacturing apparatus which concerns on the further another Example of this invention is typically shown by FIG.
図３を図１及び図２と共に参照すると、偏光板１０８は、図１の偏光フィルム製造装置９０によって延伸された偏光フィルム１０２の上面及び下面に、それぞれトリアセチルセルロースからなる保護フィルム１０４，１０６を付着して製造される。 Referring to FIG. 3 together with FIGS. 1 and 2, the polarizing plate 108 has protective films 104 and 106 made of triacetyl cellulose on the upper and lower surfaces of the polarizing film 102 stretched by the polarizing film manufacturing apparatus 90 of FIG. Manufactured with adhesion.
延伸段階５００は、延伸ローラの回転速度の変化に応じて、第１延伸水槽による第１延伸段階及び第２延伸水槽による第２延伸段階からなり、第１延伸段階でのＰＶＡフィルムの延伸倍率が１．５〜３．０倍であり、第２延伸段階でのＰＶＡフィルムの延伸倍率が２．０〜３．０倍となっている。 The stretching stage 500 includes a first stretching stage by the first stretching water tank and a second stretching stage by the second stretching water tank according to a change in the rotation speed of the stretching roller, and the stretching ratio of the PVA film in the first stretching stage is The draw ratio of the PVA film in the second stretching stage is 2.0 to 3.0 times.
また、偏光フィルム製造装置９２は、基材フィルムであるポリビニルアルコール（ＰＶＡ）フィルムを水洗する水洗槽５１、水洗したＰＶＡフィルムを膨潤させる膨潤槽５３、ヨウ素、ヨウ化カリウムとホウ酸が染着されたＰＶＡフィルムを延伸ローラによって延伸することで、染着されたヨウ素、ヨウ化カリウムとホウ酸を配向させる延伸槽５２、及び染着されたＰＶＡフィルムを洗浄する洗浄槽５４を含んでいる。 Moreover, the polarizing film manufacturing apparatus 92 is dye | stained with the washing tank 51 which wash | cleans the polyvinyl alcohol (PVA) film which is a base film, the swelling tank 53 which swells the washed PVA film, iodine, potassium iodide, and boric acid. In addition, a stretching tank 52 for orienting dyed iodine, potassium iodide and boric acid by stretching the PVA film with a stretching roller, and a cleaning tank 54 for cleaning the dyed PVA film are included.
図４及び図５には、本発明の一実施例に係る透過度を調節するためのヨウ素の制御過程の模式図が概略的に示されている。 FIGS. 4 and 5 schematically illustrate a process for controlling iodine for adjusting the permeability according to an embodiment of the present invention.
これらの図面を図１乃至図３と共に参照すると、まず、偏光フィルム製造装置９２の染着槽１０には、組成物供給装置５０の作動でポンプ２００を介してヨウ素が投入され、ポンプ２００から投入される開始地点で測定されたヨウ素濃度と、染着槽１０内の中央部位でのヨウ素濃度との偏差に基づいて、染着槽１０内の中央部位で測定されたヨウ素濃度が予め設定された範囲の低濃度（約０．５ｐｐｍ〜５０ｐｐｍ）に維持されるように、ポンプ２００からのヨウ素投入量が中央制御部６０の命令に従って組成物供給装置５０によって調節される。ここで、ポンプ２００を介して投入されるヨウ素投入量の調節は、使用環境に応じて要求される透過度Ｔｓの予め設定された値に応じて自動的に制御され、前記透過度Ｔｓは、図５に示されたように、染着槽１０及び素子乾燥オーブン３０の温度と延伸槽５２のフィルム延伸比を考慮したデータを反映して設定される。 Referring to these drawings together with FIGS. 1 to 3, first, iodine is charged into the dyeing tank 10 of the polarizing film manufacturing apparatus 92 through the pump 200 by the operation of the composition supply apparatus 50, and is charged from the pump 200. Based on the deviation between the iodine concentration measured at the starting point and the iodine concentration at the central part in the dyeing tank 10, the iodine concentration measured at the central part in the dyeing tank 10 was preset. The iodine input from the pump 200 is adjusted by the composition supply device 50 according to the command of the central controller 60 so that the low concentration in the range (about 0.5 ppm to 50 ppm) is maintained. Here, the adjustment of the amount of iodine introduced through the pump 200 is automatically controlled according to a preset value of the permeability T s required according to the use environment, and the permeability T s. As shown in FIG. 5, the value is set reflecting data considering the temperature of the dyeing tank 10 and the element drying oven 30 and the film stretching ratio of the stretching tank 52.
これによって、図４に示されているように、一次的にヨウ素濃度の模型化（Ａ）が行われると、現在のヨウ素濃度値と予測ヨウ素濃度値の相関度が約８６％を示し、二次的に透過度の模型化（Ｂ）が行われながら、実際の素子透過度と予測素子透過度の相関度が約９５％を示し、このような実験値に対する結果は、下記の図７乃至図８を通じて確認することができる。 As a result, as shown in FIG. 4, when the modeling (A) of the iodine concentration is performed temporarily, the degree of correlation between the current iodine concentration value and the predicted iodine concentration value is about 86%. While the transmittance modeling (B) is subsequently performed, the correlation between the actual device transmittance and the predicted device transmittance is about 95%, and the results for such experimental values are shown in FIGS. This can be confirmed through FIG.
図６には、本発明に係る偏光フィルム製造装置に適用される透過度予測モデルシステムが模式的に示されている。 FIG. 6 schematically shows a transmittance prediction model system applied to the polarizing film manufacturing apparatus according to the present invention.
図６を図１乃至図５と共に参照すると、透過度予測モデルシステムは、ヨウ素濃度値を入力して模型化するヨウ素入力モデルＭＩ２、及び透過度Ｔｓを入力して模型化する透過度入力モデルＭＴｓを含んでいる。 Referring to FIG. 6 together with FIGS. 1 to 5, the permeability predicting model system has an iodine input model MI 2 for modeling by inputting an iodine concentration value, and a permeability input for modeling by inputting the permeability T s. Includes model MT s .
まず、現在の染着槽１０内の現在のヨウ素濃度値２３０（１．８０ｍＭ）をベースとして目標ヨウ素濃度値２１０（１．８５ｍＭ）を入力すると、これらの差値２２０（０．０５ｍＭ）が表示される。ここで、透過度入力モデルＭＴｓには、目標素子透過度３００が現在の段階３１０に応じて上下限条件が変換される予め設定された値（４３．２％）が入力される。 First, when the target iodine concentration value 210 (1.85 mM) is input based on the current iodine concentration value 230 (1.80 mM) in the current dyeing tank 10, these difference values 220 (0.05 mM) are displayed. Is done. Here, a preset value (43.2%) in which the upper and lower limit conditions are converted according to the current stage 310 is input to the transmittance input model MT s .
その後、現在の染着槽１０内の偏光フィルムの透過度３２０（４３．７％）、偏光フィルムの移動速度４００（２７ｍ／ｍｉｎ）及び素子オーブンの温度５００（９０℃）が順次入力されながら、目標ヨウ素濃度値２１０と現在のヨウ素濃度値２３０との差値２２０（０．０５ｍＭ）が‘０’で表されるように、ポンプ２００を介して投入されるヨウ素投入量が、目標素子透過度３００の条件に応じてリアルタイムで調節される。 Thereafter, while the transmittance 320 (43.7%) of the polarizing film in the current dyeing tank 10, the moving speed 400 (27 m / min) of the polarizing film, and the temperature 500 (90 ° C.) of the element oven are sequentially input, The iodine input amount supplied through the pump 200 is the target element permeability so that the difference value 220 (0.05 mM) between the target iodine concentration value 210 and the current iodine concentration value 230 is represented by “0”. It is adjusted in real time according to 300 conditions.
また、本発明の実験結果によれば、前記偏光フィルムが前記染着槽１０の中央部位まで到達するのに必要な時間は、約１６分であるものと確認された。 Moreover, according to the experimental result of this invention, it was confirmed that the time required for the said polarizing film to reach | attain the center part of the said dyeing tank 10 is about 16 minutes.
図７には、本発明に係る予測ヨウ素濃度値と実測ヨウ素濃度値との相関関係を示すグラフが示されており、図８には、本発明に係る予測偏光フィルムの透過度及び実際の偏光フィルムの透過度の結果を示すグラフが模式的に示されている。 FIG. 7 shows a graph showing the correlation between the predicted iodine concentration value and the measured iodine concentration value according to the present invention, and FIG. 8 shows the transmittance and actual polarization of the predicted polarizing film according to the present invention. A graph showing the results of the transparency of the film is schematically shown.
図７及び図８を参照すると、染着槽の現在のヨウ素濃度とヨウ素薬液投入流量を入力データとして多重回帰分析モデルを行った結果、下記図７からわかるように、相関係数が０．８１１であって、予測ヨウ素濃度値と実測ヨウ素濃度値の分布度が非常に類似していることを確認することができ、偏光フィルムの透過度は、主要工程変数であるヨウ素の濃度を調節して達成できることを確認することができる。 Referring to FIGS. 7 and 8, as a result of performing a multiple regression analysis model using the current iodine concentration of the dyeing tank and the flow rate of iodine chemical solution as input data, the correlation coefficient is 0.811 as can be seen from FIG. 7 below. Therefore, it can be confirmed that the distribution degree of the predicted iodine concentration value and the measured iodine concentration value are very similar, and the transmittance of the polarizing film is adjusted by adjusting the concentration of iodine which is a main process variable. It can be confirmed that it can be achieved.
偏光フィルムの透過度は、図８に示されたように、相関係数が０．９７３であって、予め設定された予測素子透過度値と実測素子透過度値の正確度が非常に高いことを確認することができる。 As shown in FIG. 8, the transmittance of the polarizing film has a correlation coefficient of 0.973, and the accuracy of the preset predicted element transmittance value and measured element transmittance value is very high. Can be confirmed.
ここで、グラフに示されている実線は、当該変数の偏差を示す。 Here, the solid line shown in the graph indicates the deviation of the variable.
本発明の属する分野における通常の知識を有する者であれば、上記内容に基づいて本発明の範疇内で様々な応用及び変形を行うことが可能であろう。 A person having ordinary knowledge in the field to which the present invention belongs can make various applications and modifications within the scope of the present invention based on the above contents.
以上で説明したように、本発明に係る偏光フィルム製造装置は、染着槽のヨウ素、ヨウ化カリウムとホウ酸濃度測定器、補色槽のヨウ化カリウム濃度測定器、及び素子オーブンと４段オーブンの温度測定器から測定された入力データの特性と、連続工程に投入されるＰＶＡフィルムの特性に対する情報に基づいて、偏光フィルムの主要因子として透過度を予測するために、前記染着槽のヨウ素濃度が予め設定された範囲の低濃度に維持されるようにヨウ素の投入量をリアルタイムで制御することによって、ＰＶＡフィルムの材料損失及びヨウ素溶液の不必要な浪費を防止することができる。 As described above, the polarizing film manufacturing apparatus according to the present invention includes an iodine, potassium iodide and boric acid concentration measuring device in a dyeing tank, a potassium iodide concentration measuring device in a complementary color tank, and an element oven and a four-stage oven. In order to predict the transmittance as the main factor of the polarizing film, based on the characteristics of the input data measured from the temperature measuring device and the information on the characteristics of the PVA film input to the continuous process, the iodine in the dyeing tank By controlling the amount of iodine input in real time so that the concentration is maintained at a low concentration within a preset range, it is possible to prevent material loss of the PVA film and unnecessary waste of the iodine solution.
また、偏光フィルムの製造のために、投与される予測ヨウ素の濃度を基準として現在のヨウ素濃度及びその他の変数を考慮して、追加的なヨウ素溶液の投入量が制御されるので、一般的な染着過程で要求される時間を短縮させることができる。 In addition, for the production of polarizing films, the amount of additional iodine solution input is controlled in consideration of the current iodine concentration and other variables based on the expected iodine concentration to be administered. The time required in the dyeing process can be shortened.
１２ ヨウ素濃度測定器
１４ ヨウ化カリウム濃度測定器
１６ ホウ酸濃度測定器
２２ ヨウ化カリウム濃度測定器
３２、３４、４２、４４、４６、４８ 温度測定器
９０ 偏光フィルム製造装置
DESCRIPTION OF SYMBOLS 12 Iodine concentration measuring device 14 Potassium iodide concentration measuring device 16 Boric acid concentration measuring device 22 Potassium iodide concentration measuring device 32, 34, 42, 44, 46, 48 Temperature measuring device 90 Polarizing film manufacturing apparatus
Claims (17)
基材フィルムをヨウ素、ヨウ化カリウム及びホウ酸を含む水溶液に浸漬して染色し、前記ヨウ素が予め設定された範囲の低濃度に維持されている染着槽と、
前記染着槽の一側に備えられ、ヨウ素を連続的または断続的な点滴方式で投入する少なくとも１つのポンプと、
を含んでおり、
前記ポンプから離隔した染着槽の任意の地点で測定されたヨウ素濃度と、ヨウ素がポンプから投入される地点のヨウ素濃度との偏差に基づいて、前記任意の地点で測定されたヨウ素濃度が予め設定された範囲の低濃度に維持されるようにヨウ素の投入量を制御することを特徴とする、装置。 An apparatus for producing a PVA film (polarizing film) that exhibits polarizing properties by dyeing iodine, potassium iodide and boric acid on a base film by a continuous process,
A dyeing tank in which the base film is immersed and dyed in an aqueous solution containing iodine, potassium iodide and boric acid, and the iodine is maintained at a low concentration within a preset range; and
At least one pump provided on one side of the dyeing tank for charging iodine in a continuous or intermittent drip manner;
Contains
Based on the deviation between the iodine concentration measured at an arbitrary point of the dyeing tank separated from the pump and the iodine concentration at the point where iodine is charged from the pump, the iodine concentration measured at the arbitrary point is An apparatus characterized by controlling an input amount of iodine so as to maintain a low concentration within a set range.
ヨウ素、ヨウ化カリウム及びホウ酸が染着されたＰＶＡフィルムをヨウ化カリウム水溶液に浸漬して染色する補色槽であって、ヨウ化カリウムの濃度を測定するためのヨウ化カリウム濃度測定器を備えている補色槽と、
ヨウ素、ヨウ化カリウム及びホウ酸が配向されたＰＶＡフィルムを乾燥する素子オーブンであって、素子オーブンの温度を測定するための素子オーブン温度測定器を備えている素子オーブンと、
前記染着槽及び／又は補色槽のヨウ素投入量を制御する中央制御部と、
をさらに含むことを特徴とする、請求項１に記載の装置。 The device is
A complementary color bath for immersing and dyeing a PVA film dyed with iodine, potassium iodide and boric acid in an aqueous solution of potassium iodide, comprising a potassium iodide concentration measuring device for measuring the concentration of potassium iodide A complementary color bath,
An element oven for drying a PVA film oriented with iodine, potassium iodide and boric acid, the element oven comprising an element oven temperature measuring device for measuring the temperature of the element oven;
A central control unit for controlling the iodine input amount of the dyeing tank and / or the complementary color tank;
The apparatus of claim 1, further comprising:
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| CN106802446A (en) * | 2015-11-27 | 2017-06-06 | 住友化学株式会社 | The manufacture method of polarizer |
| CN113204067B (en) * | 2020-10-15 | 2023-05-23 | 合肥三利谱光电科技有限公司 | Dyeing process of PVA film for polaroid and polaroid |
| CN114047181A (en) * | 2021-10-09 | 2022-02-15 | 万华化学集团股份有限公司 | Method for detecting PVA coating on surface of composite reverse osmosis membrane |
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