JP2005262123A - Waste liquid treatment method and manufacturing method for printing plate using the same - Google Patents
Waste liquid treatment method and manufacturing method for printing plate using the same Download PDFInfo
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- JP2005262123A JP2005262123A JP2004079924A JP2004079924A JP2005262123A JP 2005262123 A JP2005262123 A JP 2005262123A JP 2004079924 A JP2004079924 A JP 2004079924A JP 2004079924 A JP2004079924 A JP 2004079924A JP 2005262123 A JP2005262123 A JP 2005262123A
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- 239000002699 waste material Substances 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000007639 printing Methods 0.000 title claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
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- 238000004821 distillation Methods 0.000 claims description 25
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- 229920000642 polymer Polymers 0.000 claims description 5
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- 238000004140 cleaning Methods 0.000 description 10
- 238000005187 foaming Methods 0.000 description 10
- 235000010724 Wisteria floribunda Nutrition 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 8
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- 239000000126 substance Substances 0.000 description 7
- 239000004094 surface-active agent Substances 0.000 description 7
- 239000013039 cover film Substances 0.000 description 6
- -1 fatty acid sodium salt Chemical class 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 230000007935 neutral effect Effects 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 239000004743 Polypropylene Substances 0.000 description 5
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000004745 nonwoven fabric Substances 0.000 description 5
- 229920001155 polypropylene Polymers 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 238000005292 vacuum distillation Methods 0.000 description 5
- 230000004931 aggregating effect Effects 0.000 description 4
- 239000002518 antifoaming agent Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 235000014113 dietary fatty acids Nutrition 0.000 description 4
- 239000000194 fatty acid Substances 0.000 description 4
- 229930195729 fatty acid Natural products 0.000 description 4
- 239000000706 filtrate Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 230000002265 prevention Effects 0.000 description 4
- 238000003672 processing method Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 150000004665 fatty acids Chemical class 0.000 description 3
- 239000008394 flocculating agent Substances 0.000 description 3
- 239000005060 rubber Substances 0.000 description 3
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000002070 germicidal effect Effects 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 238000005191 phase separation Methods 0.000 description 2
- 239000011342 resin composition Substances 0.000 description 2
- JHJLBTNAGRQEKS-UHFFFAOYSA-M sodium bromide Chemical compound [Na+].[Br-] JHJLBTNAGRQEKS-UHFFFAOYSA-M 0.000 description 2
- 235000019333 sodium laurylsulphate Nutrition 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 229920003051 synthetic elastomer Polymers 0.000 description 2
- 239000005061 synthetic rubber Substances 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 206010034972 Photosensitivity reaction Diseases 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
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- 238000004090 dissolution Methods 0.000 description 1
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- 238000010828 elution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000010147 laser engraving Methods 0.000 description 1
- 238000007644 letterpress printing Methods 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000000016 photochemical curing Methods 0.000 description 1
- 230000036211 photosensitivity Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000000967 suction filtration Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
Description
本発明は廃液処理方法に関し、特に印刷版の製版工程において生じる廃液の処理に適した廃液処理方法に関する。 The present invention relates to a waste liquid processing method, and more particularly to a waste liquid processing method suitable for processing a waste liquid generated in a plate making process of a printing plate.
印刷版は凸版、平版、凹版の各分野においてそれぞれ異なる印刷方式に応じた版材が提供されており、製版工程も異なっている。しかしながら、それらはすべて樹脂やゴムの組成物によりレリーフ像を形成しその物理的高低差や化学的耐性などを利用することで、インキ転写を行い、印刷を可能としている。 For the printing plate, plate materials corresponding to different printing methods are provided in the fields of letterpress, planographic and intaglio, and the plate making process is also different. However, they all form a relief image with a resin or rubber composition and utilize the physical height difference, chemical resistance, etc., thereby enabling ink transfer and printing.
例えば、感光性樹脂凸版印刷版の一般的な現像方法は、現像液中に版を浸漬させ、または現像液をシャワー状に噴射しながら、ブラシ等で未露光部をこすりだすため、未露光部の感光性樹脂成分が現像液中に溶解または分散された状態で存在する。その現像液をそのまま繰り返し用いて感光性樹脂印刷版を現像すると、現像液中の感光性樹脂成分の濃度が上昇してゆき、その結果、現像速度の低下や、分散した感光性樹脂成分が版やブラシに付着するといった問題が生じる。そのため、頻繁に現像液を交換し、あるいは、ある程度以上感光性樹脂成分を含有した現像液を廃液として廃棄する必要があった。 For example, a general development method for a photosensitive resin relief printing plate is to rub the unexposed part with a brush or the like while immersing the plate in the developer or spraying the developer in a shower shape. The photosensitive resin component is dissolved or dispersed in the developer. When the photosensitive resin printing plate is developed by repeatedly using the developer as it is, the concentration of the photosensitive resin component in the developer increases. As a result, the developing speed decreases and the dispersed photosensitive resin component is removed from the plate. And the problem of sticking to the brush occurs. Therefore, it is necessary to change the developer frequently or to discard the developer containing the photosensitive resin component to some extent as a waste solution.
特に、凸版印刷に使用する版材はそのレリーフ像の凹凸が平版や凹版と比較して大きいため、レリーフ像形成のために版材から除去される樹脂や合成ゴムの容積が大きくなる。そのため、廃液処理費用がかさむ上、大量の廃棄物を発生させるため環境面からも問題があった。 In particular, a plate material used for letterpress printing has a relief image with larger irregularities than a lithographic plate or an intaglio plate, so that the volume of the resin or synthetic rubber removed from the plate material for forming a relief image increases. For this reason, waste liquid treatment costs are increased, and a large amount of waste is generated.
そこで、環境負荷を低減させる手法として、現像工程で使用する現像液を再利用するクローズドサイクルの方法が望まれている。 Therefore, as a technique for reducing the environmental load, a closed cycle method that reuses the developer used in the development process is desired.
このような印刷版の製版工程で生じる廃液の処理方法としては、減圧蒸留することで現像液として再利用する方法が提案されている（例えば、特許文献１参照。）。しかしながら、現像液が発泡しやすい場合にはそれが減圧配管を伝い真空発生デバイスに達して減圧能力が不足するおそれがあり、さらなる改良が求められていた。 As a method for treating the waste liquid generated in the plate making process of such a printing plate, a method of reusing it as a developer by distilling under reduced pressure has been proposed (for example, see Patent Document 1). However, if the developer tends to foam, it may travel through the decompression pipe and reach the vacuum generating device, resulting in insufficient decompression capability, and further improvements have been demanded.
また、従来から行われている簡便な廃液の処理方法として、凝集剤を添加する事で樹脂成分を凝集させることにより固液分離した後に濾過を行うものがある（例えば、特許文献２参照。）。しかしながら、この方法は凝集分離効果が十分でない、得られたスラッジの粘着性が大きく作業性が悪い、濾過性が劣るなどの課題を有しており、またその濾液は凝集剤成分を含んでいるため現像液として再利用をすることが出来ない場合や、再利用が可能である場合もその性能に大きな制約を受けることが多く、それらを解決する手段が求められていた。
本発明は、蒸留工程で発泡による問題を生じない廃液処理方法、およびその廃液処理方法により再生された現像液または版洗浄液を用いて現像または版洗浄を行う印刷版の製造方法を提供することを課題とする。 The present invention provides a waste liquid processing method that does not cause a problem due to foaming in a distillation process, and a printing plate manufacturing method that performs development or plate cleaning using a developer or a plate cleaning liquid regenerated by the waste liquid processing method. Let it be an issue.
本発明は、上記問題を解決するため、主として次の構成を有する。すなわち、「廃液に凝集剤を添加する工程と、ついで前記廃液を蒸留する工程を少なくとも有する廃液処理方法」である。また本発明は、「廃液に凝集剤を添加する工程と、ついで前記廃液を蒸留する工程を少なくとも有する廃液処理方法により再生された液を用いて、現像または版洗浄を行う印刷版の製造方法」である。 In order to solve the above problems, the present invention mainly has the following configuration. That is, “a waste liquid treatment method having at least a step of adding a flocculant to the waste liquid and then a step of distilling the waste liquid”. The present invention also provides a “printing plate manufacturing method in which development or plate washing is performed using a liquid regenerated by a waste liquid treatment method having at least a step of adding a flocculant to the waste liquid and then a step of distilling the waste liquid” It is.
本発明によれば、蒸留工程での処理液の発泡を抑制し安定した処理を進めることが可能である。また減圧下で蒸留を行う場合は真空デバイスの機能を保つことができる。こうして再生された処理液を現像液または版洗浄液として再利用することができる。 According to the present invention, it is possible to suppress the foaming of the treatment liquid in the distillation process and to proceed with a stable treatment. When performing distillation under reduced pressure, the function of the vacuum device can be maintained. The processing solution regenerated in this manner can be reused as a developer or a plate cleaning solution.
以下、本発明の実施の形態を説明する。 Embodiments of the present invention will be described below.
本発明における廃液は、印刷インキ洗浄廃液、機器洗浄廃液、現像廃液、エッチング廃液、クーラント廃液、塗装廃液、水性樹脂系廃液などがあげられるが、有機成分を含みやすい印刷版の製造工程において発生する現像廃液において効果的である。 Examples of the waste liquid in the present invention include printing ink cleaning waste liquid, equipment cleaning waste liquid, development waste liquid, etching waste liquid, coolant waste liquid, coating waste liquid, aqueous resin waste liquid, and the like, but are generated in a printing plate manufacturing process that easily contains organic components. Effective in developing waste liquid.
本発明における印刷版材は、凸版、平版、凹版の各分野における異なる印刷方式に対応した公知の版材が使用できる。それらの製版工程は異なっているが、樹脂やゴムの組成物によりレリーフ像を形成し、その物理的高低差や化学的耐性などを利用することで、版上にインキ転写のための印刷画像を形成して、印刷を可能としている。また、それら版材は感光性を有していなくてもよい。 As the printing plate material in the present invention, known plate materials corresponding to different printing methods in each field of letterpress, planographic and intaglio can be used. Although the plate making process is different, a relief image is formed by a resin or rubber composition, and a printed image for ink transfer is formed on the plate by utilizing its physical height difference and chemical resistance. It can be formed and printed. Moreover, these plate materials do not need to have photosensitivity.
本発明における印刷版の製版工程で生じる廃液は、現像廃液や版面洗浄液などがあげられる。次に、それらが生じる製版工程の一例を述べるが本発明はこれに限定されるものではない。 Examples of the waste liquid generated in the plate making process of the printing plate in the present invention include a developing waste liquid and a plate surface cleaning liquid. Next, although an example of the plate making process which produces them is described, this invention is not limited to this.
感光性フレキソ印刷版に印刷用のレリーフ像を形成するためには、まず支持体側より、波長３００〜４００ｎｍの紫外線を照射し、その後、カバーフィルムを剥離した感光性樹脂層上にネガティブまたはポジティブの原画フィルムを密着させ紫外線照射し、光重合によって光硬化を行わせる。光源としては、高圧水銀灯、超高圧水銀灯、メタルハライドランプ、キセノン灯、カーボンアーク灯、ケミカル灯などがあげられる。 In order to form a relief image for printing on a photosensitive flexographic printing plate, first, ultraviolet rays having a wavelength of 300 to 400 nm are irradiated from the support side, and then a negative or positive layer is formed on the photosensitive resin layer from which the cover film has been peeled off. The original film is brought into close contact and irradiated with ultraviolet light, and photocuring is performed by photopolymerization. Examples of the light source include a high pressure mercury lamp, an ultrahigh pressure mercury lamp, a metal halide lamp, a xenon lamp, a carbon arc lamp, and a chemical lamp.
次に、紫外線照射されなかった感光性樹脂層をスプレー式現像機やブラシ式現像機により現像液に溶出させることにより、支持体上にレリーフ像を形成することができる。現像後には版面に付着した現像液や感光性樹脂を取り除くために版洗浄液で版面を洗浄し、これを乾燥後、活性光線処理してフレキソ印刷版を得ることができる。 Next, a relief image can be formed on the support by eluting the photosensitive resin layer, which has not been irradiated with ultraviolet rays, into the developer using a spray type developing machine or a brush type developing machine. After the development, the plate surface is washed with a plate washing solution to remove the developer and the photosensitive resin adhering to the plate surface, dried, and then subjected to actinic ray treatment to obtain a flexographic printing plate.
この現像液としては水道水を用いることができるが、粉石鹸などの界面活性剤を含有した水を用いてもよい。現像液中に界面活性剤を添加することによって、現像速度を向上させたり、感光性樹脂が版やブラシに付着する問題を防止する効果が得られることがある。界面活性剤としては、脂肪酸ナトリウム塩、脂肪酸カリウムや炭酸塩など汎用の石鹸成分が好適に使用される。界面活性剤を添加する場合、その添加量は現像液の全重量に対して、０．０１重量％〜１０重量％が好ましく、０．１重量％〜３重量％がより好ましい。 As this developer, tap water can be used, but water containing a surfactant such as powdered soap may be used. By adding a surfactant in the developer, an effect of improving the developing speed or preventing the problem that the photosensitive resin adheres to the plate or the brush may be obtained. As the surfactant, general-purpose soap components such as fatty acid sodium salt, fatty acid potassium and carbonate are preferably used. When the surfactant is added, the addition amount is preferably 0.01% by weight to 10% by weight and more preferably 0.1% by weight to 3% by weight with respect to the total weight of the developer.
版洗浄液としては、水道水を用いることができるが、未使用の現像液を使用してもよい。 As the plate cleaning solution, tap water can be used, but an unused developer may be used.
これらの製版工程で発生した廃液は、蒸留工程での発泡の要因となる感光性樹脂成分をできるだけ固液分離しておくことが望ましく、凝集剤の添加による方法が簡便に実施できて好ましい。凝集剤による発泡抑制効果は消泡剤による効果とは異なり、発泡成分であるポリマを固液分離しているため、処理の進行による発泡成分濃度の変動がなく安定した処理が可能であるため好ましい。 The waste liquid generated in the plate making process is preferably separated from the photosensitive resin component that causes foaming in the distillation process by solid-liquid separation as much as possible. Unlike the effect of the antifoaming agent, the foaming suppression effect by the flocculant is preferable because the polymer as the foaming component is solid-liquid separated, so that the foaming component concentration does not fluctuate due to the progress of the treatment and stable treatment is possible. .
本発明において用いられる凝集剤は、従来公知の下水処理用の凝集剤を用いることができる。このような凝集剤としては、塩化ナトリウム、塩化カリウム、臭化ナトリウム、塩化カルシウム、硫酸アルミニウム、硫酸ナトリウムなどの金属塩、ポリアクリルアミド、ポリアクリル酸ナトリウムなどの高分子凝集剤が好ましい。安価かつ入手のしやすい硫酸アルミニウムがより好ましい。凝集剤の添加量は廃液に対して０．１重量％〜５重量％が好ましい。 As the flocculant used in the present invention, conventionally known flocculants for sewage treatment can be used. As such a flocculant, metal flocculants such as sodium chloride, potassium chloride, sodium bromide, calcium chloride, aluminum sulfate and sodium sulfate, and polymer flocculants such as polyacrylamide and sodium polyacrylate are preferable. Inexpensive and readily available aluminum sulfate is more preferable. The addition amount of the flocculant is preferably 0.1% by weight to 5% by weight with respect to the waste liquid.
凝集剤を用いることによって、廃液中に溶解または分散された状態の樹脂成分を凝集することができる。先に例示した感光性フレキソ印刷版の中でも水現像可能な感光性フレキソ印刷版の感光性樹脂層には、合成ゴムに親水性官能基を導入したポリマーとモノマーを均一に溶解した均一溶解系の構造をとるもの、感光性樹脂成分の水に対する親和性の高い相と水に対する親和性の低い相とがサブマイクロメートルからマイクロメートルオーダーで分散した相分離構造をとるものがある。例えば、相分離構造をとる感光性フレキソ印刷版を水現像した場合に生じる廃液では、水に対する親和性の低い相中の成分および水に対する親和性が高い相中の一部の成分は、水に溶解せず懸濁粒子となり、水に分散した状態になる。この懸濁粒子は概して水中で負に帯電することが多く、カウンターイオンの凝集剤を添加することによって、懸濁粒子がコロイドを形成して粒子サイズが増加して、水に沈降あるいは水上に浮遊するようになり、水から容易に凝集分離できるようになる。現像液に脂肪酸金属塩のような界面活性剤を添加している場合、脂肪酸金属塩と凝集剤が吸着性の高いコロイドを形成するため、現像廃液の固形分分離の効果は大きくなる。また凝集剤を添加する際には加熱、攪拌または加熱と攪拌を双方行うことが好ましい。 By using the flocculant, the resin component dissolved or dispersed in the waste liquid can be aggregated. Among the photosensitive flexographic printing plates exemplified above, the photosensitive resin layer of the photosensitive flexographic printing plate that can be developed with water has a uniform dissolution system in which a polymer and a monomer having a hydrophilic functional group introduced into a synthetic rubber are uniformly dissolved. Some have a structure, and others have a phase separation structure in which a phase having a high affinity for water and a phase having a low affinity for water are dispersed in submicrometer to micrometer order. For example, in a waste liquid generated when a photosensitive flexographic printing plate having a phase separation structure is developed with water, components in a phase having a low affinity for water and some components in a phase having a high affinity for water are in water. It does not dissolve and becomes suspended particles, which are dispersed in water. These suspended particles are generally negatively charged in water, and by adding a counter ion flocculant, the suspended particles form a colloid and the particle size increases, so that they settle in water or float on water. Thus, it becomes possible to easily agglomerate and separate from water. When a surfactant such as a fatty acid metal salt is added to the developer, the fatty acid metal salt and the flocculant form a highly adsorbing colloid, so that the effect of separating the solid content of the development waste liquid is increased. Moreover, when adding a flocculant, it is preferable to perform heating, stirring, or both heating and stirring.
凝集剤を添加した現像廃液から効率的に樹脂成分を分離するための方法としては、自然濾過、吸引濾過、遠心分離、不織布などに粘着させる方法、浮遊物を容器からオーバーフローさせる方法などが公知であるが、取り扱いの簡便さから自然濾過が好ましい。凝集剤を添加したあと一定時間静置することで凝集した固形層と液体層とに分離する性質がある廃液の場合、固形層が浮遊するものは処理槽底面から、固形層が沈殿するものは液面側から排液を行う事で液層から先に濾過を行うことが出来、濾過分離が簡便となるためより好ましい。液層の排液は、タンクに備わるドレンバルブからの抜き出しや、ポンプによる吸引や吸い上げ、サイホンなどの利用、処理槽そのものを傾斜させて壁面上端からの排出などの方法が用いられるが、これらに限定されるものではない。さらには不織布をフィルターとして使用する自然濾過が濾過後の取り扱いに優れておりより好ましい。不織布は、レーヨン、ポリエステル、ポリプロピレンなどからなるものが好ましく用いられるが、これらに限定されるものではない。 Known methods for efficiently separating the resin component from the developing waste liquid to which the flocculant is added include natural filtration, suction filtration, centrifugal separation, a method of adhering to a nonwoven fabric, a method of overflowing suspended matter from a container, and the like. However, natural filtration is preferable because of easy handling. In the case of waste liquid that has the property of separating into an agglomerated solid layer and liquid layer by adding a flocculant after standing for a certain period of time, if the solid layer floats, the solid layer is precipitated from the bottom of the treatment tank. By draining from the liquid surface side, filtration can be performed first from the liquid layer, and filtration and separation are simplified, which is more preferable. For drainage of the liquid layer, methods such as extraction from the drain valve provided in the tank, suction or suction by a pump, use of a siphon, etc., tilting the treatment tank itself and discharging from the upper end of the wall surface are used. It is not limited. Furthermore, natural filtration using a nonwoven fabric as a filter is more preferable because it is excellent in handling after filtration. The nonwoven fabric is preferably made of rayon, polyester, polypropylene or the like, but is not limited thereto.
本発明における蒸留工程について説明する。 The distillation process in the present invention will be described.
蒸留は、廃液または凝集剤の添加により樹脂成分が分離された廃液に対して行う。凝集剤が添加されていない廃液を蒸留処理する場合は、蒸留機の蒸発器内に廃液と共に凝集剤を添加する。添加量については、前記内容と同様でよい。この場合、事前に樹脂成分を分離する必要がなく、同様の効果を得ることができ、簡便で好ましい。 Distillation is performed on the waste liquid or the waste liquid from which the resin component has been separated by the addition of a flocculant. When the waste liquid to which the flocculant is not added is distilled, the flocculant is added together with the waste liquid in the evaporator of the distiller. The amount added may be the same as described above. In this case, it is not necessary to separate the resin component in advance, and the same effect can be obtained, which is convenient and preferable.
蒸留方法には常圧蒸留、高圧蒸留、減圧蒸留などがあるが、低温での蒸留が可能であることによる取り扱いの簡便さから減圧蒸留が好ましい。また、蒸留機は公知のものであれば限定されるものでないが、蒸発器内部に取り外し可能な内容器と現像液飛散防止具を具備している“ＴＴＲ５０ＶＤ”（東レ（株）製）が後処理の簡便さから好ましい。 Distillation methods include atmospheric distillation, high pressure distillation, and vacuum distillation, but vacuum distillation is preferred because of the ease of handling due to the fact that distillation at low temperature is possible. In addition, the distiller is not limited as long as it is a publicly known one, but “TTR50VD” (manufactured by Toray Industries, Inc.) equipped with a removable inner container and a developer splash prevention device inside the evaporator is later. It is preferable from the simplicity of processing.
発生した蒸気は冷却水等を流した冷却器等の冷却手段で冷却し凝縮回収する。このときの廃液の加熱温度は液の主成分となる溶剤によって適宜選択するが、水を主成分とする現像液の場合、蒸留効率の点から４０℃以上が好ましい。また、圧力も液の主成分となる溶剤によって適宜選択するが、水を主成分とする現像液の場合、蒸気圧以下であればよいが、蒸留効率の点から４８ｋＰａ以下が好ましく、２６ｋＰａ以下がより好ましい。 The generated steam is cooled and condensed by a cooling means such as a cooler in which cooling water or the like is passed. The heating temperature of the waste liquid at this time is appropriately selected depending on the solvent as the main component of the liquid, but in the case of a developer containing water as the main component, it is preferably 40 ° C. or higher from the viewpoint of distillation efficiency. The pressure is also appropriately selected depending on the solvent that is the main component of the liquid. In the case of a developer containing water as the main component, the pressure may be less than the vapor pressure, but is preferably 48 kPa or less, and preferably 26 kPa or less in terms of distillation efficiency. More preferred.
また蒸留終了後に蒸発器内に残存する濃縮液および樹脂の廃棄方法も液の主成分となる溶剤によって適宜選択するが、廃液として廃棄または高分子吸収剤等により固形化してから廃棄することが好ましく行われる。 The disposal method of the concentrated liquid and resin remaining in the evaporator after completion of distillation is also appropriately selected depending on the solvent that is the main component of the liquid. However, it is preferable to discard the liquid after it is discarded or solidified with a polymer absorbent or the like. Done.
このようにして凝縮回収した回収液は樹脂組成物などが除去されている。例えば水を主成分とする印刷版の現像液の場合、この処理による凝縮回収液は繰り返し現像液として利用することができる。現像液を再利用する際に用いる現像機と版材は特に限定されず、公知の現像機と版材が使用できる。 The resin composition or the like is removed from the recovered liquid condensed and recovered in this way. For example, in the case of a printing plate developer containing water as a main component, the condensed and recovered solution obtained by this treatment can be repeatedly used as a developer. The developing machine and the plate material used when the developer is reused are not particularly limited, and a known developing machine and a printing material can be used.
以下、本発明を実施例で詳細に説明する。 Hereinafter, the present invention will be described in detail with reference to examples.
実施例１
Ａ２サイズの"ＷＳ９５ＨIII"（東レ（株）製 水現像型感光性樹脂凸版材）を、"ＣＲＥＯ４０Ｗ"（フィリップス社製 ケミカルランプ）を１４本設置した"ＦＴＷ５００ＬII"（富士写真フイルム（株）製 製版機）により露光した。まず、カバーフィルムを剥がして感光性樹脂層上にネガフィルムを真空密着させ、ネガフィルム側から５分間露光した。ネガフィルムは版材評価用に１７５線２％の網点チャートや４０μm幅の細線などを含む。
Example 1
"FTW500LII" (made by Fuji Photo Film Co., Ltd.) with 14 "CREO40W" (chemical lamps made by Philips) installed on A2 size "WS95HIII" (manufactured by Toray Industries Co., Ltd.). Machine). First, the cover film was peeled off, the negative film was vacuum-adhered on the photosensitive resin layer, and exposed for 5 minutes from the negative film side. The negative film includes a 175 line 2% halftone dot chart and a 40 μm wide thin line for evaluation of the plate material.
露光終了後に、"ＦＴＰ６４０II"（富士写真フイルム（株）製 製版機）を使用して現像作業を行った。現像液としては４０℃の中性水４０Ｌに界面活性剤としてラウリル硫酸ナトリウム０．３重量％を溶解したものを使用し、製版機の自動通版による現像、乾燥、後露光連続処理により、印刷版を得た。 After completion of the exposure, development was performed using “FTP640II” (a plate making machine manufactured by Fuji Photo Film Co., Ltd.). The developer used is a solution of 0.3% by weight of sodium lauryl sulfate as a surfactant in 40 L of neutral water at 40 ° C. Got a version.
この作業を２０回繰り返し行い、感光性樹脂成分が約７重量％分散した廃液４０Ｌを得た。 This operation was repeated 20 times to obtain 40 L of a waste liquid in which about 7% by weight of the photosensitive resin component was dispersed.
製版機の使用済み現像廃液回収タンクから"ＦＴＲ５０ＶＤ"（東レ（株）製 減圧蒸留機）の蒸発器内部に備わるポリプロピレン樹脂袋に現像廃液を送液し、凝集剤として硫酸アルミニウムを１重量％添加し、さらに消泡剤として"ＡＦ"（富士写真フイルム（株）製）を現像廃液１０Ｌに対して２ｍＬの割合で添加し、蒸発器の備える飛散防止具を設置した。その後加熱溶媒温度１２５℃、真空度４ｋＰａの条件で蒸留処理を行った。冷却器には冷却チラーにより１５℃の水を毎分５Ｌの流量で通水し、冷却を行った。蒸留処理７時間経過時点で３５Ｌの回収水を得た。この間、蒸発器内部および蒸気配管は発泡による汚れもなく清浄に保たれていた。また、濃縮された現像廃液はポリプロピレン樹脂袋内に固形物として残ったため、樹脂袋とともにプラスチックとして廃棄した。 The developer waste liquid is sent from the used developer waste liquid collection tank of the plate making machine to the polypropylene resin bag inside the evaporator of "FTR50VD" (manufactured by Toray Industries, Ltd., vacuum distillation machine), and 1% by weight of aluminum sulfate is added as a flocculant. Furthermore, “AF” (manufactured by Fuji Photo Film Co., Ltd.) as an antifoaming agent was added at a rate of 2 mL with respect to 10 L of developing waste liquid, and a scattering prevention device provided in the evaporator was installed. Thereafter, distillation was performed under the conditions of a heating solvent temperature of 125 ° C. and a vacuum degree of 4 kPa. The cooler was cooled by passing water at 15 ° C. at a flow rate of 5 L / min with a cooling chiller. 35 L of recovered water was obtained after 7 hours of the distillation treatment. During this time, the inside of the evaporator and the steam piping were kept clean without being contaminated by foaming. Further, since the concentrated developer waste liquid remained as a solid in the polypropylene resin bag, it was discarded as a plastic together with the resin bag.
この結果得られた回収水３５Ｌに中性水５Ｌを加えて製版機に投入し、４０℃まで加熱、界面活性剤としてラウリル硫酸ナトリウム０．３重量％を加えた後、先述と同様に２０版の製版作業を行った。 5 L of neutral water was added to 35 L of the recovered water obtained as a result, and the resulting mixture was put into a plate making machine, heated to 40 ° C., 0.3% by weight of sodium lauryl sulfate as a surfactant was added, and then 20 plates as described above. The plate making work was performed.
この一連の製版作業を３回繰り返し実施し、得られた印刷版を評価したところ、所定の性能である１７５線２％の網点と４０μm幅の細線を再現しており、実用上問題のないことが確認できた。 This series of plate making operations was repeated three times, and the obtained printing plate was evaluated. As a result, the 175 line 2% halftone dot and the 40 μm width fine line, which are the predetermined performance, were reproduced, and there was no practical problem. I was able to confirm.
実施例２
Ａ３サイズの"ＬＴ１７０Ｒ"（東レ（株）製 水現像型感光性フレキソ印刷用版材）を、"ＴＬＫ４０Ｗ／１０Ｒ"（フィリップス社製ケミカルランプ）を６本設置した"ＦＴＷ３５０ＬII"（富士写真フイルム（株）製 製版機）により露光した。まず、版の支持体側から２分間露光し、次にカバーフィルムを剥がしてネガフィルムを真空密着させ、ネガフィルム側から１５分間露光した。ネガフィルムは版材評価用に１７５線２％の網点チャートや３級明朝文字などを含む。
Example 2
"FTW350LII" (Fuji Photo Film (Fuji Photo Film) (A3 size "LT170R" (water development type photosensitive flexographic printing plate manufactured by Toray Industries, Inc.) and "TLK40W / 10R" (Philips chemical lamp) installed The exposure was carried out using a plate making machine. First, exposure was performed for 2 minutes from the support side of the plate, then the cover film was peeled off, the negative film was brought into vacuum contact, and exposure was performed for 15 minutes from the negative film side. The negative film includes a halftone dot chart of 175 lines and 3rd grade Mincho characters for evaluation of the plate material.
露光終了後に、"ＧＰＰ５００"（東レ（株）製 水現像フレキソ印刷版用製版機）を使用して現像作業を行った。現像液としては５０℃の中性水２５Ｌに"ニッサン粉石鹸"（ニッサン石鹸（株）製）０．２重量％を溶解したものを使用し、製版機の現像部で１０分間現像作業を行い、０．７ｍｍのレリーフ深度を得た。次に６０℃の温風で１０分間乾燥し、殺菌灯による表面処理を１０分間、ケミカルランプによる後露光を１０分間実施し、印刷版を得た。 After completion of the exposure, development was performed using “GPP500” (a water developing flexographic printing plate making machine manufactured by Toray Industries, Inc.). The developer used was 0.2% by weight of “Nissan powder soap” (Nissan Soap Co., Ltd.) dissolved in 25 L of neutral water at 50 ° C. and developed for 10 minutes in the developing section of the plate making machine. A relief depth of 0.7 mm was obtained. Next, it was dried with warm air of 60 ° C. for 10 minutes, surface treatment with a germicidal lamp was carried out for 10 minutes, and post-exposure with a chemical lamp was carried out for 10 minutes to obtain a printing plate.
この作業を１５回繰り返し行い、感光性樹脂成分が約５重量％分散した廃液２５Ｌを得た。 This operation was repeated 15 times to obtain a waste liquid 25L in which the photosensitive resin component was dispersed by about 5% by weight.
製版機から別の容器にこの廃液を抜き出し、凝集剤として硫酸アルミニウムを１重量％添加、攪拌して約２時間放置したところ、樹脂分が凝集浮遊した状態となった。容器底面にあるドレンバルブから液を抜き出した。この時濾過フィルターとして"アクスターＧ５０７５"（東レ（株）製不織布 目付量７５ｇ／ｍ2、通気量１４５ｃｍ3／ｃｍ2／sec.、繊維径２４μｍ）を使用した。容器底面から樹脂成分をほとんど含まない廃液が先に排出され、最後に浮遊した樹脂成分がフィルターに流れ込み、目詰まりすることなく約３０分で水切りが完了し、良好な濾過性能を示した。 When this waste liquid was extracted from the plate making machine into another container, 1% by weight of aluminum sulfate was added as an aggregating agent, and the mixture was stirred and allowed to stand for about 2 hours, the resin component was in an agglomerated state. The liquid was extracted from the drain valve on the bottom of the container. At this time, “Axter G5075” (nonwoven fabric basis weight 75 g / m 2 , air flow rate 145 cm 3 / cm 2 / sec., Fiber diameter 24 μm) manufactured by Toray Industries, Inc. was used as a filtration filter. Waste liquid containing almost no resin component was first discharged from the bottom of the container, and finally the resin component that floated flowed into the filter, and draining was completed in about 30 minutes without clogging, indicating good filtration performance.
この濾過液に消泡剤として"ＡＦ"（富士写真フイルム（株）製）を現像廃液１０Ｌに対して２ｍＬの割合で添加し、"ＦＴＲ５０ＶＤ"（東レ（株）製 減圧蒸留機）の蒸発器内部に備わるポリプロピレン樹脂袋に送液し、飛散防止具を設置した。その後、加熱溶媒温度１２５℃、真空度４ｋＰａの条件で蒸留処理を行った。冷却器には冷却チラーにより１５℃の水を毎分５Ｌの流量で通水し、冷却を行った。蒸留処理５時間経過時点で２３Ｌの回収水を得た。この間、蒸発器内部および蒸気配管は発泡による汚れもなく清浄に保たれていた。 "AF" (produced by Fuji Photo Film Co., Ltd.) as an antifoaming agent is added to this filtrate at a rate of 2 mL with respect to 10 L of developing waste liquid, and the evaporator of "FTR50VD" (vacuum distillation machine produced by Toray Industries, Inc.) The solution was sent to a polypropylene resin bag inside, and a splash prevention device was installed. Thereafter, distillation was performed under the conditions of a heating solvent temperature of 125 ° C. and a degree of vacuum of 4 kPa. The cooler was cooled by passing water at 15 ° C. at a flow rate of 5 L / min with a cooling chiller. 23 L of recovered water was obtained after 5 hours of the distillation treatment. During this time, the inside of the evaporator and the steam piping were kept clean without being contaminated by foaming.
この結果得られた回収水２３Ｌに中性水２Ｌを加えて製版機に投入し、５０℃まで加熱し、ニッサン粉石鹸を０．２重量％加えた後、先述と同様に１５版の製版作業を行った。 After adding 2 L of neutral water to 23 L of the recovered water thus obtained and putting it into a plate making machine, heating to 50 ° C. and adding 0.2% by weight of Nissan powder soap, the plate making work of 15 plates as described above Went.
この一連の製版作業を３回繰り返し実施し、得られた印刷版を評価したところ、所定の性能である１７５線２％の網点と３級明朝文字を再現しており、実用上問題のないことが確認できた。 This series of plate making operations was repeated three times, and the obtained printing plate was evaluated. As a result, the 175 line 2% halftone dots and the third grade Mincho characters were reproduced, which was a practical problem. It was confirmed that there was no.
実施例３
Ａ３サイズの"ＬＴ１７０ＨＲ"（東レ（株）製 水現像型感光性フレキソ印刷用版材）を、"ＴＬＫ４０Ｗ／１０Ｒ"（フィリップス社製ケミカルランプ）を６本設置した"ＦＴＷ３５０ＬII"（富士写真フイルム（株）製 製版機）により露光した。まず、版の支持体側から２分間露光し、次にカバーフィルムを剥がさずにそのままカバーフィルム側から１５分間露光した。
Example 3
"FTW350LII" (Fuji Photo Film (Fuji Photo Film) (A3 size "LT170HR" (Toray Corp. water development type photosensitive flexographic printing plate) and "TLK40W / 10R" (Philips Chemical Lamp) installed. The exposure was carried out using a plate making machine. First, exposure was performed for 2 minutes from the support side of the plate, and then exposure was performed for 15 minutes from the cover film side without peeling off the cover film.
露光終了後にカバーフィルムを剥がして、"ＺＥＤ Ｍｉｎｉ１０００"（ZED Insturuments社 ＣＯ2レーザー彫刻機）のシリンダーに両面テープを用いて露光済み版材を装着し、レリーフ像形成作業を行った。あらかじめ用意しておいた１５０線３％の網点と４級明朝文字を含む１ｂｉｔＴＩＦＦ画像データファイルを"ＺＥＤ Ｍｉｎｉ１０００"の専用データに変換した後、シリンダーを回転させながらＣＯ2レーザーを照射することによる彫刻を行った結果、レリーフ深度０．４ｍｍのレリーフ像を得た。しかしながら、彫刻時の熱により溶解した樹脂やゴム組成物がレリーフ像の周囲に残存しているため、洗浄の必要があった。 After completion of the exposure, the cover film was peeled off, and the exposed plate material was attached to the cylinder of “ZED Mini1000” (ZED Instruments CO 2 laser engraving machine) using double-sided tape, and a relief image was formed. Convert a 1-bit TIFF image data file containing 150% 3% halftone dots and 4th grade Mincho characters prepared in advance into dedicated data for "ZED Mini1000", and then irradiate the CO 2 laser while rotating the cylinder As a result of engraving, a relief image having a relief depth of 0.4 mm was obtained. However, since the resin and the rubber composition dissolved by the heat at the time of engraving remain around the relief image, it has been necessary to wash them.
次に"ＧＰＰ５００"（東レ（株）製 水現像フレキソ印刷版用製版機）の現像部を利用して洗浄作業を行った。洗浄液としては５０℃の中性水２５Ｌに"ニッサン粉石鹸（ニッサン石鹸（株）製）０．２重量％を溶解したものを使用し、２分間洗浄作業を行い、０．５ｍｍのレリーフ深度を得た。次に６０度の温風で乾燥を１０分間、殺菌灯による表面処理を１０分間実施し、印刷版を得た。 Next, a cleaning operation was performed using a developing section of “GPP500” (a water developing flexographic printing plate making machine manufactured by Toray Industries, Inc.). As a cleaning solution, use a solution of 0.2% by weight of “Nissan powder soap (Nissan Soap Co., Ltd.)” dissolved in 25 L of neutral water at 50 ° C. and perform a cleaning operation for 2 minutes to obtain a relief depth of 0.5 mm. Next, drying was performed with warm air of 60 ° C. for 10 minutes, and surface treatment with a germicidal lamp was performed for 10 minutes to obtain a printing plate.
この洗浄作業を４０回繰り返し行い、感光性樹脂成分が約２重量％分散した廃液２５Ｌを得た。 This washing operation was repeated 40 times to obtain a waste liquid 25L in which about 2% by weight of the photosensitive resin component was dispersed.
製版機から別の容器にこの廃液を抜き出し、凝集剤として硫酸アルミニウムを１重量％添加、攪拌して約２時間放置したところ、樹脂分が凝集浮遊した状態となった。容器底面にあるドレンバルブから液を抜き出した。この時濾過フィルターとして"アクスターＧ５０７５"（東レ（株）製不織布 目付量７５ｇ／ｍ2、通気量１４５ｃｍ3／ｃｍ2／sec.、繊維径２４μｍ）を使用した。容器底面から樹脂成分をほとんど含まない廃液が先に排出され、最後に浮遊した樹脂成分がフィルターに流れ込み、目詰まりすることなく約１５分で水切りが完了し、良好な濾過性能を示した。 When this waste liquid was extracted from the plate making machine into another container, 1% by weight of aluminum sulfate was added as an aggregating agent, and the mixture was stirred and allowed to stand for about 2 hours, the resin component was in an agglomerated state. The liquid was extracted from the drain valve on the bottom of the container. At this time, “Axter G5075” (nonwoven fabric basis weight 75 g / m 2 , air flow rate 145 cm 3 / cm 2 / sec., Fiber diameter 24 μm) manufactured by Toray Industries, Inc. was used as a filtration filter. The waste liquid containing almost no resin component was discharged first from the bottom of the container, and finally the resin component that floated flowed into the filter, draining was completed in about 15 minutes without clogging, and good filtration performance was shown.
この濾過液に消泡剤として"ＡＦ"（富士写真フイルム（株）製）を現像廃液１０Ｌに対して２ｍＬの割合で添加し、"ＦＴＲ５０ＶＤ"（東レ（株）製 減圧蒸留機）の蒸発器内部に備わるポリプロピレン樹脂袋に送液し、飛散防止具を設置した。その後、加熱溶媒温度１２５℃、真空度４ｋＰａの条件で蒸留処理を行った。冷却器には冷却チラーにより１５℃の水を毎分５Ｌの流量で通水し、冷却を行った。蒸留処理５時間経過時点で２３Ｌの回収水を得た。この間、蒸発器内部および蒸気配管は発泡による汚れもなく清浄に保たれていた。 "AF" (produced by Fuji Photo Film Co., Ltd.) as an antifoaming agent is added to this filtrate at a rate of 2 mL with respect to 10 L of developing waste liquid, and the evaporator of "FTR50VD" (vacuum distillation machine produced by Toray Industries, Inc.) The solution was sent to a polypropylene resin bag inside, and a splash prevention device was installed. Thereafter, distillation was performed under the conditions of a heating solvent temperature of 125 ° C. and a degree of vacuum of 4 kPa. The cooler was cooled by passing water at 15 ° C. at a flow rate of 5 L / min with a cooling chiller. 23 L of recovered water was obtained after 5 hours of the distillation treatment. During this time, the inside of the evaporator and the steam piping were kept clean without being contaminated by foaming.
この結果得られた回収水２３Ｌに中性水２Ｌを加えて製版機に投入し、５０℃まで加熱、ニッサン粉石鹸を０．２重量％加えた後、先述と同様に４０版の洗浄作業を行った。 After adding 2 L of neutral water to the recovered water 23 L obtained as a result and putting it in the plate making machine, heating to 50 ° C., adding 0.2% by weight of Nissan powder soap, and then washing the 40 plate as described above. went.
得られた印刷版を評価したところ、所定の性能である１５０線３％の網点と４級明朝文字を再現しており、実用上問題のないことが確認できた。 When the obtained printing plate was evaluated, it was confirmed that the halftone dot of 150% 3% and the fourth grade Mincho characters, which are the predetermined performance, were reproduced, and there was no practical problem.
比較例１
実施例１と同様の方法で得られた樹脂組成物濃度約７重量％の現像液を利用して、凝集剤を添加することなく、その他は実施例１と同様の条件で蒸留処理を行った。その後蒸留処理を観察したところ、蒸留開始３０分後に真空度が低下し、さらに３５分後には蒸発機内の圧力が大気圧と同等となり、安全弁から水蒸気が吹き出したために、処理を中止した。その後、原因調査を行った結果、処理廃液の発泡により発泡した処理廃液が蒸気配管を伝い、真空発生装置であるポンプを空転させていたことが判明した。
Comparative Example 1
A developer having a resin composition concentration of about 7% by weight obtained in the same manner as in Example 1 was used, and the distillation treatment was performed under the same conditions as in Example 1 except that no flocculant was added. . Thereafter, when the distillation treatment was observed, the degree of vacuum decreased 30 minutes after the start of distillation, and further 35 minutes later, the pressure in the evaporator became equal to the atmospheric pressure, and steam was blown out from the safety valve, so the treatment was stopped. After that, as a result of investigating the cause, it was found that the processing waste liquid bubbling due to the foaming of the processing waste liquid traveled along the steam pipe, causing the pump, which was a vacuum generator, to idle.
比較例２
実施例２と同様の方法で得られた濾過液を、蒸留処理を行うことなく製版機に投入し現像液として５０℃まで加熱し、ニッサン粉石鹸を０．２重量％加えた後、先述と同様に製版作業を行った。現像液に凝集剤が含まれているため、現像液中に溶出または分散する感光性樹脂成分が溶出と同時に凝集し、版や現像機が備えるブラシに付着してしまうことがわかったため作業を中止した。
Comparative Example 2
The filtrate obtained in the same manner as in Example 2 was put into a plate making machine without being subjected to distillation treatment, heated to 50 ° C. as a developer, added with 0.2% by weight of Nissan soap, Similarly, plate making was performed. Because the developer contains an aggregating agent, it was found that the photosensitive resin component that was eluted or dispersed in the developer aggregated at the same time as the elution, and adhered to the brush provided in the plate or the developer. did.
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