JP3605787B2 - Method for dissolving powdery polymer compound - Google Patents
Method for dissolving powdery polymer compound Download PDFInfo
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- JP3605787B2 JP3605787B2 JP01032798A JP1032798A JP3605787B2 JP 3605787 B2 JP3605787 B2 JP 3605787B2 JP 01032798 A JP01032798 A JP 01032798A JP 1032798 A JP1032798 A JP 1032798A JP 3605787 B2 JP3605787 B2 JP 3605787B2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F21/00—Dissolving
- B01F21/02—Methods
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F21/00—Dissolving
- B01F21/10—Dissolving using driven stirrers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/85—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with two or more stirrers on separate shafts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/90—Heating or cooling systems
- B01F35/92—Heating or cooling systems for heating the outside of the receptacle, e.g. heated jackets or burners
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/90—Heating or cooling systems
- B01F2035/99—Heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
- B01F2101/2805—Mixing plastics, polymer material ingredients, monomers or oligomers
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Description
【０００１】
【発明の属する技術分野】
本発明は、粉体状高分子化合物の溶解方法に関し、詳しくはハロゲン化銀写真感光材料の製造工程における親水性コロイド、例えばゼラチンの効率的な溶解方法に関する。
【０００２】
【従来の技術】
従来、高分子化合物の粉体を溶解する場合に、いわゆる「ママコ」とか「ダマ」が発生するという問題があった。「ママコ」あるいは「ダマ」は、粉体が凝集した塊状物であって、粉体状高分子、例えばゼラチン等を溶解する際、粉体に溶媒である水が十分浸透しない間に高温にさらされた場合、該粉体の表面のみが溶解してゲル状の高濃度の薄層となり、内部が粉体のままで溶解しない状態になることである。
【０００３】
このため、粉体状高分子化合物の溶解にあたっては、内部まで十分に溶媒を浸透させてから温度を上げ溶解することが必要となり、できれば該高分子化合物を溶媒で膨潤してから溶解することが望ましい。しかしながらこのような方法では、時間がかかり、かつ膨潤した高分子化合物の撹拌にも多大な動力が必要となり、工業的に実施するには問題が多い。
【０００４】
また、溶解中に泡が発生し、効率的な溶解ができないという問題、泡による故障（例えば、ハロゲン化銀写真感光材料の塗布の際、泡による塗布ムラ）が生じた。
【０００５】
そのため、従来よりこの問題に対していくつかの対策が提案されている。例えば低温の溶媒に粉体を添加、分散させた後、強力な撹拌のもとに昇温、溶解させる方法であるが、なお、時間的に十分短縮されていない。
【０００６】
また、高分子化合物の溶解温度以上の溶媒温度を用いる方法についても提案されている。例えば特開昭５０−９７５８７号、同６２−２３４５３４号、特開平４−１５０９３３号等に記載されており、超音波照射による方法、あるいは脱泡との併用等種々提案されているが、作業効率、費用あるいは確実性の点でいずれも十分満足できるものではない。また特開平２−２７５２９０号の方法では、撹拌動力エネルギー密度が５〜１５ｋｗｈ／ｌであって、撹拌動力エネルギー密度から判断すると十分満足できる効率ではない。
【０００７】
【発明が解決しようとする課題】
上記のような問題に対して、本発明の課題は、粉体状高分子化合物、特にゼラチンについて、溶解が単時間で行え、設備費ならびにランニングコストも安く、しかもママコ、泡を発生することのない粉体状高分子化合物の溶解方法を提供することにある。
【０００８】
【課題を解決するための手段】
本発明の上記課題は、下記手段により達成される。
【０００９】
１．溶媒を撹拌機を有する恒温ジャケット付きタンク内に投入して温度３０〜３９℃で、撹拌レイノルズ数が２．０×１０５以上となる様に撹拌しつつ、高分子化合物の粉体を投入して、分散後、４０℃までは１℃／ｍｉｎ以上の速度で昇温し、さらに５０〜６０℃まで昇温することを特徴とする粉体状高分子化合物の溶解方法。
【００１０】
２．溶媒として脱気水を使用することを特徴とする前記１に記載の粉体状高分子化合物の溶解方法。
【００１１】
３．減圧状態で溶解することを特徴とする前記１又は２に記載の粉体状高分子化合物の溶解方法。
【００１２】
４．粉体状高分子化合物の溶解濃度が１０〜３０％の範囲にあることを特徴とする前記１、２又は３に記載の粉体状高分子化合物の溶解方法。
【００１３】
５．前記粉体状高分子化合物がゼラチンであることを特徴とする前記１〜４のいずれか１項に記載の粉体状高分子化合物の溶解方法。
【００１４】
６．前記撹拌機が、撹拌翼径がタンク内径の１／３以上である４枚ピッチドパドル、又はＴＫコンビミックスであることを特徴とする前記１〜５のいずれか１項に記載の粉体状高分子化合物の溶解方法。
【００１５】
以下、本発明について具体的に説明する。
【００１６】
本発明でいうママコを発生する粉体状高分子化合物としては、例えば次のようなものの粉体が挙げられる。ゼラチン、ゼラチン誘導体、アラビアゴム、ガム、澱粉、ポリビニルアルコール、カルボキシメチルセルロース、ポリアクリルアミド、ポリアクリル酸ナトリウム等溶解度の熱依存性が高く、吸湿膨潤性のものである。
【００１７】
本発明では特にハロゲン化銀写真感光材料用バインダーとして用いられるゼラチンを主たる対象とするがこれに限定されるものではない。
【００１８】
本発明における脱気水とは、使用温度における飽和溶存酸素量に対して７０％以下の溶存酸素量である水をいい、溶存酸素が少なければ少ない程好ましい。溶存酸素量はＤＯメーターｍｏｄｅｌ５８（日科機装［株］製）測定器により測定したものとする。脱気水を溶媒として用いることにより撹拌により混入または発生する泡を溶解し、泡として顕在化することによる故障の発生を防止することができる。
【００１９】
本発明においては、減圧状態で溶解することが好ましいが、減圧することにより溶媒の溶存酸素を低下させることでゼラチン水溶液の脱泡が可能となり、さらに脱泡効果が期待できる。このことは特にハロゲン化銀写真感光材料のように塗布に際して気泡の発生が大きな塗布故障を誘発する場合には極めて重要な問題となる。
【００２０】
本発明における減圧状態とは、３００Ｔｏｒｒ以下で一定減圧値で減圧する状態をいう。
【００２１】
本発明において溶解する粉体状高分子化合物の溶解濃度は、本発明を効果より奏する点で、１０〜３０％であることが好ましい。。
【００２２】
本発明に用いられる撹拌装置は粉体状高分子化合物を投入する撹拌翼付近の撹拌レイノルズ数が２．０×１０５以上であれば得に限定しないが、撹拌翼径がタンク内径１／３以上である４枚ピッチドパドル又はＴＫコンビミックスであることが好ましい。
【００２３】
図１はこれらの撹拌装置を装着した恒温ジャケット付きタンクの断面図である。図１において、１は溶解槽、２は恒温ジャケット、５は温度センサーである。
【００２４】
図１（ａ）は４枚ピッチドパドル撹拌機を装着した例であって、３ｄは撹拌機を示す。４は邪魔板である。
【００２５】
図１（ｂ）はＴＫコンビミックス撹拌機を装着した例である。ＴＫコンビミックスはアンカーミキサー（３ｃ）＋ＴＫホモミキサー（３ａ）＋ＴＫホモディスパー（３ｂ）から構成されている。
【００２６】
本発明において、撹拌レイノルズ数とは撹拌翼近傍の液の流動状態を示すパラメータで、撹拌レイノルズ数Ｒは下記式により算出することができる。
【００２７】
Ｒ＝μｄ２／υ
μ：翼回転数、ｄ：翼径、υ：液の動粘度
本発明における溶解槽中の撹拌レイノルズ数２．０×１０５以上が必要である。本発明の技術的な制約からして自ずと上限はある。
【００２８】
本発明の粉体状高分子化合物をタンク内に添加するには、まず前記撹拌装置を有するタンク中の好ましくは脱気された溶媒の温度を３０〜３９℃、好ましくは３０〜３５℃とし、投入位置とその周辺の撹拌機の撹拌レイノルズ数２．０×１０５以上になるように撹拌する。この中に粉体状高分子化合物を添加するに当たっては、ママコの発生を防ぎ、分散した状態にするために、当然のことながら撹拌速度の速い撹拌羽根の翼端付近に徐々に添加することが好ましく、工業的には翼端部分のできるだけ広い面積に分散して、徐々に（１０ｋｇ／ｍｉｎ以下）添加することが望ましい。粉体状高分子化合物の添加、分散後、急速（１℃／ｍｉｎ）に温度を４０℃まで上げ、さらに４５〜６０℃まで上げ、溶解後４０℃まで下げる。
【００２９】
本発明により、膨潤速度と溶解速度のバランスを効率よく取ることができるのである。
【００３０】
【実施例】
以下、実施例により本発明の効果を例証する。
【００３１】
実施例１
図１は恒温ジャケット付きタンクであって、タンク直径は１０００ｍｍである。図１（ａ）には４枚ピッチドパドル撹拌機（直径４００ｍｍ）、図１（ｂ）にはＴＫコンビミックス撹拌機（アンカーミキサーの直径８８０ｍｍ、ホモディスパーの直径２００ｍｍ、ホモミキサーの直径１５０ｍｍ）（特殊機化［株］製）の例を示した。
【００３２】
上記それぞれの撹拌機を装着したタンクに、溶媒として３５℃に温めた水又は脱気水（溶存酸素量２ｐｐｍ）８００ｌを投入し、投入後、投入付近の撹拌翼付近の撹拌レイノルズ数が４．７×１０５になるように回転させ、その後高分子化合物の粉末としてゼラチンをエアー搬送により投入した。タンク内の撹拌動力のエネルギー密度は１．４ｋｗｈ／ｌ、ゼラチン投入期間は１０ｋｇ／ｍｉｎとした。
【００３３】
ゼラチン投入終了後より恒温ジャケットの温水を調節してタンク内の温度を１℃／ｍｉｎの上昇速度で４０℃まで急速昇温させた。その後、そのままの場合とタンク内を３００Ｔｏｒｒで減圧した場合について、３０分かけて５０℃まで昇温させ、ゼラチン投入後４０分で溶解させた。
【００３４】
その時のタンク内の温度を温度センサーで測定した状態を図２に示す。４０分後、溶解したゼラチン液を濾過し、未溶解物を調査したがいずれの撹拌機を用いた場合にも未溶解物は確認されず完全に溶解された。
【００３５】
また、溶解したゼラチン液をサンプリングして泡の量を測定した。上記、常圧かつ通常の溶解水を用いた場合はゼラチン溶液１０００ｍｌ中に泡量が３０ｍｌあったのに対して、常圧で溶解水に脱気水を用いた場合は、０．０１ｍｌであり、脱気水と減圧を併用した場合には、泡量は０．００１ｍｌであった。これにより、脱気水及び／又は減圧した場合の効果は明らかである。
【００３６】
実施例２
実施例１で下記条件を変更した以外は実施例１と同様に行った。
【００３７】
溶媒としては３９℃の温水を使用し、撹拌レイノルズ数を７．３×１０５とした。溶解時間は３５分で、実施例１と同様に溶解したゼラチン液を濾過した結果、未溶解のゼラチンは認められず、完全に溶解されていた。
【００３８】
比較例１
実施例１で下記条件を変更した以外は実施例１と同様に行った。
【００３９】
溶媒として２５℃の温水を使用し、撹拌レイノルズ数は１．０×１０５とした。ゼラチン投入後８０分後に実施例１と同様にしてチェックしたところ未溶解物が散見された。
【００４０】
比較例２
実施例１で下記条件を変更した以外は実施例１と同様に行った。
【００４１】
溶媒として６０℃の温水を使用し、撹拌レイノルズ数は１．５×１０５とした。ゼラチン投入後８０分後に実施例１と同様にしてチェックしたところ未溶解物が散見された。
【００４２】
【発明の効果】
本発明により粉体状高分子化合物、特にゼラチンについて、溶解が単時間で行え、設備費ならびにランニングコストも安く、しかもママコ、泡を発生することのない粉体状高分子化合物の溶解方法を提供することができた。
【図面の簡単な説明】
【図１】本発明の恒温ジャケット付きのタンクの１例を示す断面図である。
【図２】タンク内の温度を温度センサーで測定した状態を示す図である。
【符号の説明】
１ 溶解槽
２ 恒温ジャケット
４ 邪魔板[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for dissolving a powdery polymer compound, and more particularly, to a method for efficiently dissolving a hydrophilic colloid, for example, gelatin in a process for producing a silver halide photographic light-sensitive material.
[0002]
[Prior art]
Heretofore, there has been a problem that when a powder of a polymer compound is dissolved, a so-called “mamako” or “dama” is generated. "Mamako" or "Dama" is a lump of agglomerated powder and is exposed to a high temperature while dissolving a powdery polymer, for example, gelatin, etc., while water as a solvent does not sufficiently penetrate the powder. In this case, only the surface of the powder is dissolved to form a gel-like high-concentration thin layer, and the inside is in a state where the powder remains undissolved.
[0003]
Therefore, in dissolving the powdery polymer compound, it is necessary to sufficiently dissolve the solvent into the inside and then raise the temperature to dissolve the polymer compound. desirable. However, such a method is time-consuming and requires a large amount of power to stir the swollen polymer compound, which is problematic for industrial implementation.
[0004]
In addition, bubbles were generated during dissolution, resulting in a problem that efficient dissolution was not possible, and failure due to bubbles (for example, coating unevenness due to bubbles when applying a silver halide photographic light-sensitive material) occurred.
[0005]
Therefore, several countermeasures have been proposed for this problem. For example, a method of adding and dispersing a powder in a low-temperature solvent and then raising and dissolving the temperature under vigorous stirring has not yet been sufficiently shortened in terms of time.
[0006]
Further, a method using a solvent temperature equal to or higher than the dissolution temperature of the polymer compound has also been proposed. For example, it is described in JP-A-50-97587, JP-A-62-234534, JP-A-4-150933, etc., and various methods such as a method by ultrasonic irradiation or a combined use with defoaming have been proposed. Neither cost nor reliability is satisfactory. Further, in the method disclosed in JP-A-2-275290, the stirring power energy density is 5 to 15 kwh / l, and the efficiency is not sufficiently satisfactory when judged from the stirring power energy density.
[0007]
[Problems to be solved by the invention]
In view of the above-mentioned problems, an object of the present invention is to dissolve a powdery polymer compound, particularly gelatin, in a single hour, reduce equipment costs and running costs, and generate mamako and bubbles. To provide a method for dissolving a powdery polymer compound.
[0008]
[Means for Solving the Problems]
The above object of the present invention is achieved by the following means.
[0009]
1. The solvent is charged into a tank with a thermostat jacket having a stirrer, and the polymer compound powder is charged while stirring at a temperature of 30 to 39 ° C. so that the stirring Reynolds number becomes 2.0 × 10 5 or more. A method of dissolving the powdery polymer compound, wherein after dispersing, the temperature is increased at a rate of 1 ° C./min or more to 40 ° C., and further increased to 50 to 60 ° C.
[0010]
2. 2. The method for dissolving a powdery polymer compound according to the above 1, wherein degassed water is used as a solvent.
[0011]
3. 3. The method for dissolving a powdery polymer compound according to the above 1 or 2, wherein the dissolving is performed under reduced pressure.
[0012]
4. 4. The method for dissolving a powdery polymer compound according to the
[0013]
5. The method for dissolving a powdery polymer compound according to any one of the above items 1 to 4, wherein the powdery polymer compound is gelatin.
[0014]
6. The powdery polymer according to any one of the above items 1 to 5, wherein the stirrer is a four-pitch paddle having a stirring blade diameter equal to or more than 1/3 of a tank inner diameter or a TK combination. Compound dissolution method.
[0015]
Hereinafter, the present invention will be described specifically.
[0016]
Examples of the powdery polymer compound that generates momako in the present invention include the following powders. Gelatin, gelatin derivatives, gum arabic, gum, starch, polyvinyl alcohol, carboxymethylcellulose, polyacrylamide, sodium polyacrylate, and the like have a high heat dependence on solubility and are hygroscopic and swellable.
[0017]
In the present invention, gelatin mainly used as a binder for a silver halide photographic light-sensitive material is mainly used, but the present invention is not limited thereto.
[0018]
The degassed water in the present invention refers to water having a dissolved oxygen amount of 70% or less with respect to a saturated dissolved oxygen amount at a use temperature, and the smaller the dissolved oxygen, the better. The dissolved oxygen amount is measured by a DO meter model 58 (manufactured by Nikkakiso Co., Ltd.) measuring device. By using degassed water as a solvent, bubbles mixed or generated by agitation can be dissolved, and the occurrence of a failure due to manifestation as bubbles can be prevented.
[0019]
In the present invention, it is preferable to dissolve in a reduced pressure state, but by reducing the dissolved oxygen in the solvent by reducing the pressure, the gelatin aqueous solution can be defoamed, and a defoaming effect can be expected. This is a very important problem particularly when the generation of bubbles induces a large coating failure as in the case of a silver halide photographic light-sensitive material.
[0020]
The reduced pressure state in the present invention refers to a state where the pressure is reduced at a constant reduced pressure value at 300 Torr or less.
[0021]
The dissolution concentration of the powdery polymer compound dissolved in the present invention is preferably 10 to 30% from the viewpoint of achieving the effects of the present invention. .
[0022]
The stirring device used in the present invention is not particularly limited as long as the stirring Reynolds number near the stirring blade into which the powdery polymer compound is charged is 2.0 × 10 5 or more. The above-mentioned four-pitch paddle or TK combination is preferable.
[0023]
FIG. 1 is a cross-sectional view of a tank with a constant temperature jacket equipped with these stirring devices. In FIG. 1, 1 is a melting tank, 2 is a constant temperature jacket, and 5 is a temperature sensor.
[0024]
FIG. 1A shows an example in which a four-pitch paddle stirrer is mounted, and 3d shows a stirrer. 4 is a baffle board.
[0025]
FIG. 1B shows an example in which a TK combination mixer is mounted. The TK combimix is composed of an anchor mixer (3c) + TK homomixer (3a) + TK homodisper (3b).
[0026]
In the present invention, the stirring Reynolds number is a parameter indicating the flow state of the liquid near the stirring blade, and the stirring Reynolds number R can be calculated by the following equation.
[0027]
R = μd 2 / υ
μ: blade rotation speed, d: blade diameter, Δ: kinematic viscosity of liquid A stirring Reynolds number of 2.0 × 10 5 or more in the dissolution tank in the present invention is required. There is naturally an upper limit due to technical restrictions of the present invention.
[0028]
To add the powdery polymer compound of the present invention into the tank, first, the temperature of the preferably degassed solvent in the tank having the stirring device is 30 to 39 ° C, preferably 30 to 35 ° C, Stirring is performed so that the Reynolds number of the stirrer at the charging position and its surroundings is 2.0 × 10 5 or more. When adding the powdery polymer compound to this, naturally, it is necessary to gradually add it to the vicinity of the tip of the stirring blade with a high stirring speed in order to prevent the generation of mamako and to make the dispersed state. Preferably, industrially, it is desirable to disperse it over as large an area as possible at the tip of the blade and gradually add (10 kg / min or less). After the addition and dispersion of the powdery polymer compound, the temperature is rapidly (1 ° C / min) raised to 40 ° C, further raised to 45 to 60 ° C, and lowered to 40 ° C after dissolution.
[0029]
According to the present invention, the swelling rate and the dissolution rate can be efficiently balanced.
[0030]
【Example】
Hereinafter, the effects of the present invention will be illustrated by examples.
[0031]
Example 1
FIG. 1 shows a tank with a constant temperature jacket, and the tank diameter is 1000 mm. FIG. 1 (a) shows a 4-pitch paddle stirrer (400 mm in diameter), and FIG. 1 (b) shows a TK combimix stirrer (880 mm in diameter of anchor mixer, 200 mm in diameter of homodisper, 150 mm in diameter of homomixer) (special An example of this is shown below.
[0032]
800 l of water or degassed water (dissolved oxygen content: 2 ppm) warmed to 35 ° C. as a solvent is introduced into a tank equipped with each of the above stirrers, and after the introduction, the stirring Reynolds number near the stirring blade near the introduction is 4. It was rotated to 7 × 10 5 , and then gelatin as a powder of a polymer compound was introduced by air conveyance. The energy density of the stirring power in the tank was 1.4 kwh / l, and the gelatin injection period was 10 kg / min.
[0033]
After the completion of the addition of gelatin, the temperature in the tank was rapidly increased to 40 ° C. at a rate of 1 ° C./min by adjusting warm water in a constant temperature jacket. Thereafter, the temperature was raised to 50 ° C. over 30 minutes in the case where the pressure was maintained as it was and the case where the pressure in the tank was reduced at 300 Torr, and dissolved 40 minutes after the gelatin was charged.
[0034]
FIG. 2 shows a state where the temperature in the tank at that time was measured by the temperature sensor. After 40 minutes, the dissolved gelatin solution was filtered and undissolved matter was examined. However, no undissolved matter was confirmed using any of the agitators, and the dissolved matter was completely dissolved.
[0035]
Further, the dissolved gelatin solution was sampled to measure the amount of foam. Above, when using normal pressure and normal dissolved water, the foam amount was 30 ml in 1000 ml of gelatin solution, whereas when using degassed water as dissolved water at normal pressure, it was 0.01 ml. When degassed water and reduced pressure were used together, the foam amount was 0.001 ml. Thereby, the effect of degassed water and / or reduced pressure is clear.
[0036]
Example 2
Example 1 was repeated, except that the following conditions were changed.
[0037]
Hot water at 39 ° C. was used as a solvent, and the stirring Reynolds number was 7.3 × 10 5 . The dissolution time was 35 minutes, and the gelatin solution dissolved in the same manner as in Example 1 was filtered. As a result, no undissolved gelatin was observed and the gelatin was completely dissolved.
[0038]
Comparative Example 1
Example 1 was repeated, except that the following conditions were changed.
[0039]
Warm water at 25 ° C. was used as a solvent, and the stirring Reynolds number was 1.0 × 10 5 . When checked in the same manner as in Example 1 80 minutes after the addition of gelatin, undissolved substances were found.
[0040]
Comparative Example 2
Example 1 was repeated, except that the following conditions were changed.
[0041]
Warm water at 60 ° C. was used as the solvent, and the stirring Reynolds number was 1.5 × 10 5 . When checked in the same manner as in Example 1 80 minutes after the addition of gelatin, undissolved substances were found.
[0042]
【The invention's effect】
According to the present invention, there is provided a method for dissolving a powdery polymer compound, particularly gelatin, which can be dissolved in a single hour, equipment costs and running costs are low, and mamako and bubbles are not generated. We were able to.
[Brief description of the drawings]
FIG. 1 is a sectional view showing an example of a tank with a constant temperature jacket according to the present invention.
FIG. 2 is a diagram showing a state where the temperature in a tank is measured by a temperature sensor.
[Explanation of symbols]
1
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01032798A JP3605787B2 (en) | 1998-01-22 | 1998-01-22 | Method for dissolving powdery polymer compound |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01032798A JP3605787B2 (en) | 1998-01-22 | 1998-01-22 | Method for dissolving powdery polymer compound |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11209476A JPH11209476A (en) | 1999-08-03 |
| JP3605787B2 true JP3605787B2 (en) | 2004-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP01032798A Expired - Fee Related JP3605787B2 (en) | 1998-01-22 | 1998-01-22 | Method for dissolving powdery polymer compound |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2008184344A (en) * | 2007-01-29 | 2008-08-14 | Grace Chemicals Kk | Segregation-resistant cement admixture |
| JP5212630B2 (en) * | 2008-08-13 | 2013-06-19 | 花王株式会社 | Analytical method of fluid flow state in combined stirred tank |
| JP2010204306A (en) * | 2009-03-02 | 2010-09-16 | Jsr Corp | Method for producing resin solution for photoresist |
| JP2011195457A (en) * | 2010-03-17 | 2011-10-06 | Denki Kagaku Kogyo Kk | Method for deaerating liquid containing hyaluronic acid and/or salt thereof |
| JP5690497B2 (en) * | 2010-03-17 | 2015-03-25 | 電気化学工業株式会社 | Method for producing liquid containing high purity hyaluronic acid and / or salt thereof |
| JP6024091B2 (en) * | 2011-10-18 | 2016-11-09 | 三菱レイヨン株式会社 | Method for dissolving powdered water-soluble polymer compound |
| CN106975419A (en) * | 2017-03-27 | 2017-07-25 | 成都蒲江珂贤科技有限公司 | A kind of pharmaceutical raw material stirring integratedization equipment |
| CN109200838A (en) * | 2018-09-20 | 2019-01-15 | 佛山市海天（江苏）调味食品有限公司 | Continuous colloidal sol system |
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1998
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| Publication number | Publication date |
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| JPH11209476A (en) | 1999-08-03 |
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