JP4199483B2 - Cleaning agent for printing - Google Patents
Cleaning agent for printing Download PDFInfo
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- JP4199483B2 JP4199483B2 JP2002164707A JP2002164707A JP4199483B2 JP 4199483 B2 JP4199483 B2 JP 4199483B2 JP 2002164707 A JP2002164707 A JP 2002164707A JP 2002164707 A JP2002164707 A JP 2002164707A JP 4199483 B2 JP4199483 B2 JP 4199483B2
- Authority
- JP
- Japan
- Prior art keywords
- printing
- pyruvic acid
- cleaning agent
- weight
- dimethyl carbonate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Printing Plates And Materials Therefor (AREA)
- Detergent Compositions (AREA)
Description
【0001】
【発明の属する技術分野】
本発明は印刷用洗浄剤に関し、特に印刷用ゴムブランケット及び印刷用ゴムロールにおいて使用される印刷用洗浄剤に関する。
【0002】
【従来の技術】
周知の如く、印刷機では、停止時に洗浄剤によりインキ汚れを洗浄、除去する必要がある。しかし、印刷用ブランケットや印刷用ゴムロールにおいては、紙粉、紙の添加剤である炭酸カルシウム等の付着物質が問題となっており、洗浄剤はインキのみならずこれらの付着物質を同時に除去できる必要がある。
【0003】
ところで、従来の洗浄剤としては、ガソリン、ミネラルスピリット、灯油等の炭化水素油、ジクロルメタン、トリクロロエチレン等の塩素系溶剤が使用されていた。
【0004】
【発明が解決しようとする課題】
しかし、灯油等の炭化水素油は、紙粉汚れに対する除去効果が悪いという問題点があった。また、塩素系溶剤は洗浄効果を有するものの、近年、環境汚染の問題があり、洗浄溶剤として使用することが問題になってきた。
【0005】
本発明は上記事情を考慮してなされたもので、ピルビン酸と炭酸ジメチルを含有した構成とすることにより、インキのみならず紙の添加剤である炭酸カルシウム等の付着物質を同時に除去できるとともに、毒性が低く、環境汚染性が極めて低い印刷用洗浄剤を提供することを目的とする。
【0006】
【課題を解決するための手段】
本発明に係る印刷用洗浄剤は、ピルビン酸と炭酸ジメチルを含有してなることを特徴とする。また、本発明に係る印刷用洗浄剤は、ピルビン酸、炭酸ジメチルの他、アルコール系有機溶剤とグリコール系有機溶剤を含有してなることを特徴とする
【0007】
更に、本発明に係る印刷用洗浄剤は、ピルビン酸0.5〜10重量%と炭酸ジメチル5〜40重量%を含有してなることを特徴とする。
【0008】
【発明の実施の形態】
以下、本発明の印刷用洗浄剤について更に詳しく説明する。
本発明は、ピルビン酸と炭酸ジメチルを含有することを特徴とするが、好ましくは両者の配合割合をピルビン酸0.5〜10重量%、炭酸ジメチル5〜40重量%とし、更に好ましくはピルビン酸0.5〜1重量%、炭酸ジメチル10〜30重量%とする。
【0009】
ピルビン酸の配合割合を上記のように規定したのは、ピルビン酸が0.5重量%未満ではインキや付着物質特に紙の添加剤である炭酸カルシウムを十分に洗浄できず、10重量%を超えると酸が多すぎて乾燥が悪くなり、かつ洗浄性も悪くなるからである。
【0010】
また、炭酸ジメチルが5重量%未満ではインキや付着物質特に紙粉を十分に洗浄できず、40重量%を越えると印刷用ゴムブランケット、ゴムロールの膨潤、乾燥後の収縮が大きくなってしまうからである。
【0011】
本発明において、上記ピルビン酸は臭気が少ない点で好ましい。また、ピルビン酸を炭酸ジメチルと組み合わせると、特に紙の添加剤である炭酸カルシウムの洗浄性が優れているため、好ましい。
【0012】
本発明において、上記炭酸ジメチルが好ましいのは、低沸点(沸点:90℃)であり乾燥性が良好で、除去作業が容易になるからである。通常、低沸点の有機溶剤は、引火点もそれなりに低い物となってしまうが、炭酸ジメチルは引火点が高めである(引火点:17℃)。また、インキに対する溶解性も充分である。
【0013】
本発明によれば、印刷用洗浄剤にピルビン酸と炭酸ジメチルを含有しているので、インキに加え、紙粉、紙の添加剤である炭酸カルシウム等の付着物質を同時に洗浄でき、かつ、毒性が低く、環境汚染性を抑制できるという利点を有する。なお、ピルビン酸の代替えとして、脂肪族炭化水素例えばイソオクタンと炭酸エステルとを組み合わせることが考えられるが、紙粉、紙の添加剤である炭酸カルシウム等の付着に関する洗浄性が悪い。また、イソオクタンは、各都道府県条例による使用禁止あるいは削減対象物質として挙げられているので,環境汚染の問題が解決できない。
【0014】
本発明において、前記ピルビン酸、炭酸ジメチルの他、アルコール系有機溶剤とグリコール系有機溶剤を含有することができる。ここで、アルコール系有機溶剤としては、例えばメタノール、エタノール、イソプロピルアルコール、イソブチルアルコール、n−ブチルアルコール、n−プロピルアルコール、sec−ブチルアルコール、tert−ブチルアルコールが挙げられる。
【0015】
前記グリコール系有機溶剤としては、例えば1,3ジオキソラン、テトラヒドロフラン、エチレングリコールモノエチルエーテル、エチレングリコールモノブチルエーテル、メチルメトキシブタノール、エチレングリコールモノイソプロピルエーテル、エチレングリコールモノイソブチルエーテル、エチレングリコールモノt−ブチルエーテル、プロピレングリコールモノメチルエーテル、プロピレングリコールモノプロピルエーテル、エチレングリコールモノプロピルエーテル、ジエチレングリコールモノメチルエーテル、ジエチレングリコールモノエチルエーテル、ジエチレングリコールモノブチルエーテル、ジプロピレングリコールモノメチルエーテルが挙げられる。
【0016】
【実施例】
以下、本発明の各実施例及び比較例に係る印刷用洗浄剤について説明する。
(実施例1)
本実施例1では、下記表1に示すように、炭酸ジメチル30重量%、ピルビン酸2重量%、プロピレングリコールモノメチルエーテル30重量%及びn−プロピルアルコール38重量%を配合して印刷用洗浄剤を製造した。
【0017】
事実、実機印刷を行い、印刷後にゴムブランケット表面に付着したインキ及び紙粉、その他布に含ませた実施例1の印刷用洗浄剤にて拭き取り、その効果(インキ洗浄性、紙粉除去、炭酸カルシウム除去、都道府県条例等による使用可否)を調べたところ、下記表2に結果が得られた。表2より、実施例1の印刷用洗浄剤によれば、いずれの試験項目についても良好な結果が得られることが確認できた。
【0018】
【表1】
【0019】
【表2】
【0020】
(比較例1)
比較例1では、上記表1に示すような配合割合、即ちプロピレングリコールモノメチルエーテル40重量%、及び1,1’−ジクロロ−1−フルオロエタン60重量%を配合して印刷用洗浄剤を製造した。
【0021】
比較例1による印刷用洗浄剤の場合も、実施例1と同様、インキ洗浄性、紙粉除去、炭酸カルシウム除去、都道府県条例等による使用可否を調べたところ、上記表2に示す結果が得られた。表2より、比較例1の場合、インキ洗浄性に優れるが、紙粉除去、炭酸カルシウム除去、都道府県条例等による使用可否のいずれの項目についても良好な結果が得られなかった。
【0022】
(比較例2)
比較例2では、上記表1のような配合割合、ピルビン酸2重量%、プロピレングリコールモノメチルエーテル30重量%、n−プロピルアルコール38重量%、及びイソオクタン30重量%を配合して印刷用洗浄剤を製造した。
【0023】
比較例2による印刷用洗浄剤の場合も、実施例1と同様、インキ洗浄性、紙粉除去、炭酸カルシウム除去、都道府県条例等による使用可否を調べたところ、上記表2に示す結果が得られた。表2より、比較例2の場合も、インキ洗浄性に優れるが、紙粉除去、炭酸カルシウム除去、都道府県条例等による使用可否のいずれの項目についても良好な結果が得られなかった。
【0024】
(実施例2〜6)
実施例2〜6では、実施例1で用いた炭酸ジメチル、ピルビン酸、プロピレングリコールモノメチルエーテル及びn−プロピルアルコールの配合割合を下記表3に示すように夫々変えて各種の印刷用洗浄剤を製造した。
【0025】
実施例2〜6による印刷用洗浄剤について、夫々インキ洗浄性、紙粉除去、炭酸カルシウム除去、乾燥性、ゴムの膨潤について調べたところ、下記表5に結果が得られた。表5より、何れの実施例2〜6の場合も良好な結果が得られ、特に実施例1については最良の結果が得られた。
【0026】
(比較例3〜8)
比較例3〜8では、炭酸ジメチル、ピルビン酸、プロピレングリコールモノメチルエーテル及びn−プロピルアルコールの配合割合を下記表4に示すように、変えて印刷用洗浄剤を製造した。
【0027】
比較例3〜8による印刷用洗浄剤の場合についても、インキ洗浄性、紙粉除去、炭酸カルシウム除去、乾燥性、ゴムの膨潤について調べたところ、下記表6に結果が得られた。表6より、いずれの比較例3〜8の場合も、インキ洗浄性、紙粉除去、炭酸カルシウム除去、乾燥性、ゴムの膨潤の全てを満足するものはなく、紙粉除去、炭酸カルシウム除去、乾燥性、ゴムの膨潤の少なくともいずれかで満足な結果が得られなかった。
【0028】
【表3】
【0029】
【表4】
【0030】
【表5】
【0031】
【表6】
【0032】
以上より、実施例のように炭酸ジメチル、ピルビン酸、プロピレングリコールモノメチルエーテル及びn−プロピルアルコールを含む印刷用洗浄剤、特に炭酸ジメチル5〜40重量%、ピルビン酸0.5〜10重量%である印刷用洗浄剤は優れた特性を有することが確認できた。
【0033】
【発明の効果】
以上詳述した如く本発明によれば、ピルビン酸と炭酸ジメチルを含有した構成とすることにより、インキのみならず紙の添加剤である炭酸カルシウム等の付着物質を同時に除去できるとともに、毒性が低く、環境汚染性が極めて低い印刷用洗浄剤を提供できる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a printing cleaning agent, and more particularly to a printing cleaning agent used in a printing rubber blanket and a printing rubber roll.
[0002]
[Prior art]
As is well known, in a printing machine, it is necessary to clean and remove ink stains with a cleaning agent when stopped. However, in printing blankets and printing rubber rolls, adhering substances such as paper dust and calcium carbonate, which is a paper additive, are problematic, and the cleaning agent must be able to remove not only ink but also these adhering substances at the same time. There is.
[0003]
By the way, as conventional cleaning agents, hydrocarbon oils such as gasoline, mineral spirits and kerosene, and chlorinated solvents such as dichloromethane and trichloroethylene have been used.
[0004]
[Problems to be solved by the invention]
However, hydrocarbon oils such as kerosene have a problem that the removal effect against paper dust stains is poor. Moreover, although a chlorinated solvent has a cleaning effect, it has a problem of environmental pollution in recent years, and it has become a problem to use it as a cleaning solvent.
[0005]
The present invention has been made in consideration of the above circumstances, and by having a constitution containing pyruvic acid and dimethyl carbonate , it is possible to simultaneously remove not only ink but also adhering substances such as calcium carbonate which is an additive of paper, An object of the present invention is to provide a printing cleaning agent having low toxicity and extremely low environmental pollution.
[0006]
[Means for Solving the Problems]
The printing detergent according to the present invention comprises pyruvic acid and dimethyl carbonate . Further, the printing cleaning agent according to the present invention is characterized by containing an alcohol organic solvent and a glycol organic solvent in addition to pyruvic acid and dimethyl carbonate.
Furthermore, the printing detergent according to the present invention is characterized by containing 0.5 to 10% by weight of pyruvic acid and 5 to 40% by weight of dimethyl carbonate .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the printing cleaning agent of the present invention will be described in more detail.
The present invention is characterized in that it contains pyruvic acid and dimethyl carbonate, but preferably the blending ratio of both is 0.5 to 10% by weight of pyruvic acid and 5 to 40% by weight of dimethyl carbonate , more preferably pyruvic acid. 0.5 to 1 wt% and dimethyl carbonate 10 to 30 wt%.
[0009]
The compounding ratio of pyruvic acid is defined as described above. If the amount of pyruvic acid is less than 0.5% by weight, ink and adhering substances, especially calcium carbonate, which is an additive for paper, cannot be sufficiently washed, and the amount exceeds 10% by weight. This is because there is too much acid and the drying becomes worse and the detergency becomes worse.
[0010]
In addition, if dimethyl carbonate is less than 5% by weight, ink and adhering substances, particularly paper dust, cannot be washed sufficiently, and if it exceeds 40% by weight, the printing rubber blanket and rubber roll swell and shrinkage after drying increases. is there.
[0011]
In the present invention, the pyruvic acid is preferable in that it has less odor. Further, it is preferable to combine pyruvic acid with dimethyl carbonate because it is particularly excellent in the detergency of calcium carbonate which is an additive for paper.
[0012]
In the present invention, the reason why the dimethyl carbonate is preferred is that it has a low boiling point (boiling point: 90 ° C.), good drying properties, and facilitates removal. Usually, a low boiling point organic solvent has a low flash point, but dimethyl carbonate has a high flash point (flash point: 17 ° C.). Also, the solubility in ink is sufficient.
[0013]
According to the present invention, since the printing detergent contains pyruvic acid and dimethyl carbonate , in addition to the ink, it is possible to simultaneously wash the adhering substances such as paper dust, calcium carbonate which is an additive of paper, and toxicity. Is low and has the advantage of being able to suppress environmental pollution. As an alternative to pyruvic acid , it is conceivable to combine aliphatic hydrocarbons such as isooctane and carbonate, but the detergency of adhesion of paper powder, calcium carbonate, which is an additive for paper, etc. is poor. In addition, isooctane is listed as a banned or reduced substance by each prefectural ordinance, so the problem of environmental pollution cannot be solved.
[0014]
In the present invention, in addition to pyruvic acid and dimethyl carbonate , an alcohol organic solvent and a glycol organic solvent can be contained. Here, examples of the alcohol-based organic solvent include methanol, ethanol, isopropyl alcohol, isobutyl alcohol, n-butyl alcohol, n-propyl alcohol, sec-butyl alcohol, and tert-butyl alcohol.
[0015]
Examples of the glycol organic solvent include 1,3 dioxolane, tetrahydrofuran, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, methyl methoxybutanol, ethylene glycol monoisopropyl ether, ethylene glycol monoisobutyl ether, ethylene glycol mono t-butyl ether, Examples include propylene glycol monomethyl ether, propylene glycol monopropyl ether, ethylene glycol monopropyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, and dipropylene glycol monomethyl ether.
[0016]
【Example】
Hereinafter, the cleaning agent for printing which concerns on each Example and comparative example of this invention is demonstrated.
(Example 1)
In this Example 1, as shown in Table 1 below, a printing detergent comprising 30% by weight of dimethyl carbonate, 2% by weight of pyruvic acid, 30% by weight of propylene glycol monomethyl ether and 38% by weight of n-propyl alcohol was blended. Manufactured.
[0017]
In fact, actual printing was performed and the ink and paper dust adhered to the rubber blanket surface after printing were wiped off with the printing detergent of Example 1 contained in the cloth, and the effects (ink cleaning properties, paper dust removal, carbonic acid removal) As a result of examining calcium removal and use by prefectural ordinances, the results are shown in Table 2 below. From Table 2, according to the cleaning agent for printing of Example 1, it has confirmed that a favorable result was obtained also about any test item.
[0018]
[Table 1]
[0019]
[Table 2]
[0020]
(Comparative Example 1)
In Comparative Example 1, a printing detergent was prepared by blending a blending ratio as shown in Table 1 above, that is, 40% by weight of propylene glycol monomethyl ether and 60% by weight of 1,1′-dichloro-1-fluoroethane. .
[0021]
In the case of the cleaning agent for printing according to Comparative Example 1, as in Example 1, when the ink washing property, paper powder removal, calcium carbonate removal, prefectural regulations, etc. were examined, the results shown in Table 2 above were obtained. It was. From Table 2, in the case of Comparative Example 1, the ink washability was excellent, but good results were not obtained for any of the items of paper powder removal, calcium carbonate removal, prefectural regulations.
[0022]
(Comparative Example 2)
In Comparative Example 2, a cleaning agent for printing was prepared by blending a blending ratio as shown in Table 1 above, 2% by weight pyruvic acid, 30% by weight propylene glycol monomethyl ether, 38% by weight n-propyl alcohol, and 30% by weight isooctane. Manufactured.
[0023]
In the case of the cleaning agent for printing according to Comparative Example 2, as in Example 1, when the ink washing property, paper powder removal, calcium carbonate removal, prefectural regulations were examined, the results shown in Table 2 above were obtained. It was. From Table 2, in Comparative Example 2, the ink cleaning properties are also excellent, but good results were not obtained for any of the items of paper powder removal, calcium carbonate removal, prefectural regulations.
[0024]
(Examples 2 to 6)
In Examples 2 to 6, various printing detergents were produced by changing the blending ratios of dimethyl carbonate, pyruvic acid, propylene glycol monomethyl ether and n-propyl alcohol used in Example 1 as shown in Table 3 below. did.
[0025]
The printing detergents according to Examples 2 to 6 were examined for ink washability, paper dust removal, calcium carbonate removal, drying property, and rubber swelling, and the results are shown in Table 5 below. From Table 5, good results were obtained in any of Examples 2 to 6, and in particular, the best result was obtained for Example 1.
[0026]
(Comparative Examples 3 to 8)
In Comparative Examples 3 to 8, printing detergents were produced by changing the blending ratio of dimethyl carbonate, pyruvic acid, propylene glycol monomethyl ether and n-propyl alcohol as shown in Table 4 below.
[0027]
In the case of printing detergents according to Comparative Examples 3 to 8, the ink washing property, paper dust removal, calcium carbonate removal, drying property, and rubber swelling were examined. The results are shown in Table 6 below. From Table 6, in any of Comparative Examples 3 to 8, none of the ink cleaning properties, paper powder removal, calcium carbonate removal, drying properties, and rubber swelling were satisfied. Paper dust removal, calcium carbonate removal, Satisfactory results were not obtained with at least one of drying and rubber swelling.
[0028]
[Table 3]
[0029]
[Table 4]
[0030]
[Table 5]
[0031]
[Table 6]
[0032]
From the above, as in the examples, printing detergents containing dimethyl carbonate, pyruvic acid, propylene glycol monomethyl ether and n-propyl alcohol, particularly dimethyl carbonate 5 to 40% by weight, pyruvic acid 0.5 to 10% by weight. It was confirmed that the printing detergent has excellent characteristics.
[0033]
【The invention's effect】
As described above in detail, according to the present invention, by including pyruvic acid and dimethyl carbonate , it is possible to remove not only ink but also adhering substances such as calcium carbonate, which is an additive of paper, and low toxicity. In addition, it is possible to provide a printing cleaning agent with extremely low environmental pollution.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2002164707A JP4199483B2 (en) | 2002-06-05 | 2002-06-05 | Cleaning agent for printing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP2002164707A JP4199483B2 (en) | 2002-06-05 | 2002-06-05 | Cleaning agent for printing |
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JP2004010725A JP2004010725A (en) | 2004-01-15 |
JP4199483B2 true JP4199483B2 (en) | 2008-12-17 |
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JP2002164707A Expired - Lifetime JP4199483B2 (en) | 2002-06-05 | 2002-06-05 | Cleaning agent for printing |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104004603A (en) * | 2014-05-26 | 2014-08-27 | 芜湖风雪橡胶有限公司 | Cleaner composition for cleaning surface of rubber and preparation method thereof |
CN104004606A (en) * | 2014-05-26 | 2014-08-27 | 芜湖风雪橡胶有限公司 | Cleaner composition for cleaning surface of rubber and preparation method thereof |
-
2002
- 2002-06-05 JP JP2002164707A patent/JP4199483B2/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104004603A (en) * | 2014-05-26 | 2014-08-27 | 芜湖风雪橡胶有限公司 | Cleaner composition for cleaning surface of rubber and preparation method thereof |
CN104004606A (en) * | 2014-05-26 | 2014-08-27 | 芜湖风雪橡胶有限公司 | Cleaner composition for cleaning surface of rubber and preparation method thereof |
Also Published As
Publication number | Publication date |
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JP2004010725A (en) | 2004-01-15 |
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