KR101766209B1 - Cleaning solution composition for offset-printing cliche and cleaning method using the same - Google Patents

Abstract

The present invention relates to an offset printing plate cleaning liquid composition and a cleaning method using the same, more specifically, an alkali metal hydroxide 0.1 to 12 wt%; From 1 to 35% by weight of an organic amine compound; And 50 to 90% by weight of the amide-based compound, it is possible to uniformly and simultaneously remove the solidified ink remaining on the scaffold, that is, both the RGB ink and the RGB ink, without damaging the intaglio plate in which the fine pattern is formed The present invention relates to an offset printing plate cleaning liquid composition capable of ensuring reproducibility of a printing pattern and capable of continuously performing a direct cleaning process during an offset process, thereby improving process yield and productivity, and a cleaning method using the same.

Description

TECHNICAL FIELD [0001] The present invention relates to an offset printing plate cleaning liquid composition for offset printing and a cleaning method using the same. BACKGROUND ART [0002]

The present invention relates to an offset printing plate precursor cleaning composition capable of rapidly removing solidified ink remaining on an intaglio after offset printing, and a cleaning method using the same.

In the offset printing method, ink is filled in an intaglio plate on which a pattern to be printed is formed, the filled ink is transferred to a cylindrical blanket in a pattern shape, and then the blanket is rotated on the printed body to transfer So that the printed pattern is printed.

Such an offset printing method is advantageous in that it can precisely print fine patterns having a size of several tens to several hundreds of microns at a low cost without generating harmful waste liquid, and has become a technology capable of replacing the photolithography process.

Of the offset printing methods, the intaglio offset printing method has been studied as a technique suitable for forming a fine pattern for wiring which is easy to form a fine pattern having a line width of 200 mu m or less and a relatively high height and is required to have high electrical conductivity.

In the intaglio offset printing method, ink is filled in an engraved part of an intaglio plate engraved with a pattern to be printed on a flat surface of a base material, the transferred ink is transferred to a blanket, and then re-transferred to the blanket . The shape of the fine pattern formed by the intaglio offset printing method is easily influenced by the fluidity of the ink, the pressure applied to the intaglio plate, or the like. When the ink filled in the intaglio plate is not transferred to the blanket, it is deformed. This is disadvantageous in that it is difficult to ensure the reproducibility of the fine pattern.

To solve this problem, a method has been proposed in which residual ink is removed by regularly washing the intaglio plate once or several times after intaglio offset printing. However, the solidified ink is difficult to remove in a short period of time, and the removal rate of the ink is slower than the intaglio offset printing speed, which may cause a decrease in productivity.

Not only the removal rates of the inks for the black matrix (BM) and the algae ratio (RGB) are different, but also the rates at which the red (R), green (G) and blue (B) inks are removed from the intaglio. Therefore, when applying a conventional resist stripping liquid or cleaning liquid to clean the intaglio plate, it is difficult to simultaneously remove each color of the ink, and the problem is that the ink dissolved by cleaning remains on the intaglio plate surface and is reabsorbed Lt; / RTI >

An object of the present invention is to provide an offset printing plate cleaning liquid composition capable of rapidly removing not only BM remaining on the intaglio plate having a fine pattern but also solidified ink for RGB at high speed.

Another object of the present invention is to provide a cleaning method in which a cleaning process can be continuously performed in-line in an offset printing process using the offset printing offset cleaning liquid composition.

1. 0.1 to 10% by weight alkali metal hydroxide; 1 to 40% by weight of an organic amine compound; And 50 to 90% by weight of an amide compound.

2. The offset printing plate precursor cleaning composition of 1 above, further comprising an organic solvent.

3. The method according to item 2, wherein the polar solvent is selected from the group consisting of an ether compound, an alcohol compound, a pyrrolidone compound, an imidazolidinone compound, a lactone compound, a sulfoxide compound, a phosphate compound, Wherein the pressure-sensitive adhesive layer is at least one selected from the group consisting of the following.

4. The composition of claim 2, wherein the alkali metal hydroxide is 0.1 to 10% by weight; 1 to 25% by weight of an organic amine compound; 50 to 90% by weight of an amide compound; And 5 to 35% by weight of an organic solvent.

5. The composition of claim 4, wherein the alkali metal hydroxide is 0.1 to 5% by weight; 3 to 15% by weight of an organic amine compound; 60 to 80% by weight of an amide compound; And 10 to 25% by weight of an organic solvent.

6. The offset printing puddle cleaning liquid composition of 1 above, wherein the alkali metal hydroxide is at least one selected from the group consisting of lithium hydroxide, sodium hydroxide and potassium hydroxide.

7. The offset printing plate precursor cleaning composition according to Item 1, wherein the organic amine compound is a compound represented by the following Formula 1:

(Wherein R ₁ to R ₃ are independently a hydrogen atom, a substituted or unsubstituted alkyl or hydroxyalkyl group having 1-10 carbon atoms, a substituted or unsubstituted alkenyl or hydroxyalkenyl group having 2-10 carbon atoms, a carboxyl group , A substituted or unsubstituted cycloalkyl group or a hydroxycycloalkyl group having 5 to 8 carbon atoms, a phenyl group or a benzyl group, and when R ₁ to R ₃ are substituted, an amino group substituted or unsubstituted with an alkyl group having ₁ to 4 carbon atoms, , A hydroxy group, an alkyl group having 1-10 carbon atoms, or an alkyl group having 1-10 carbon atoms substituted with an alkoxy group having 1-10 carbon atoms which is substituted or unsubstituted with a hydroxy group).

8. The composition of claim 7, wherein the compound of formula (1) is selected from the group consisting of methylamine, ethylamine, monoisopropylamine, n-butylamine, sec-butylamine, isobutylamine, t-butylamine, pentylamine, Amino-1-propanol, 4-amino-1-butanol, 2- (2-aminoethoxy) ethanol, methyl (Methoxymethyl) aminoethanol, methyl (butoxymethyl) aminoethanol, dimethylamine, diethylamine, dipropylamine, diisopropylamine, dibutylamine, diisobutylamine, (Ethylamino) ethanol, 2- (methylamino) ethanol, dibutanolamine, trimethylamine, triethylamine, triethylamine, triethylamine, Ethylamine, tripropylamine, tributylamine, tripentylamine, dimethylethylamine, methyldi N-dimethylethanolamine, N, N-diethylethanolamine, (butoxymethyl) diethylamine, (methoxymethyl) di (Methoxymethyl) diethanolamine, and (hydroxyethyloxymethyl) diethylamine. The composition of claim 1,

9. The offset printing plate precursor cleaning composition according to 1 above, wherein the amide compound is a compound represented by the following formula (2)

(Wherein R ₄ and R ₅ are independently a hydrogen atom, an alkyl group or a hydroxyalkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, a carboxy group having 1 to 10 carbon atoms substituted with an alkoxy group having 1 to 10 carbon atoms An alkyl group, an amino group substituted or unsubstituted with an alkyl group having 1 to 4 carbon atoms, or a cycloalkyl group or a hydroxycycloalkyl group substituted or unsubstituted with an alkyl group having 1 to 4 carbon atoms).

10. The composition for offset printing as claimed in claim 9, wherein the compound represented by the general formula (2) is at least one selected from the group consisting of formamide, N-methylformamide and N, N-dimethylformamide.

11. A cleaning method comprising a step of dissolving and removing an ink remaining on an intaglio with an offset printing offset cleaning composition according to any one of items 1 to 10 above.

12. The cleaning method as in 11 above, wherein the cleaning process is performed continuously on an in-line during the offset printing process.

INDUSTRIAL APPLICABILITY The offset printing plate cleaning liquid composition according to the present invention can dissolve the solidified ink remaining on the intaglio after printing without damaging the intaglio plate having the fine pattern and can remove the ink at high speed, thereby ensuring the reproducibility of the print pattern.

Further, the cleaning liquid composition of the present invention can simultaneously remove both the BM and the RGB inks uniformly and at a high speed, and the ink removed by the cleaning can be reabsorbed on the intaglio plate to prevent re-contamination of the intaglio plate .

In addition, the cleaning composition and cleaning method of the present invention can be introduced directly during the offset process to continuously perform the cleaning process in-line, thereby improving the process yield and productivity.

1 is an optical microscope photograph of the offset printing intaglio plate formed with fine patterns,
2 is an optical microscope photograph of a specimen (BM) cleaned for 20 seconds using the cleaning composition according to Example 1 of the present invention,
3 is an optical microscope photograph of a specimen (BM) cleaned for 20 seconds using the cleaning composition according to Comparative Example 3. Fig.

The present invention relates to an offset printing plate precursor cleaning composition capable of rapidly removing solidified ink remaining on an intaglio after offset printing, and a cleaning method using the same.

Hereinafter, the present invention will be described in detail.

The offset printing offset cleaning composition of the present invention comprises 0.1 to 10% by weight of an alkali metal hydroxide; 1 to 40% by weight of an organic amine compound; And 50 to 90% by weight of an amide compound.

Further, the offset printing offset cleaning liquid composition of the present invention may further comprise an organic solvent.

Preferably, the offset printing offset cleaning composition of the present invention comprises from 0.1 to 10% by weight of an alkali metal hydroxide; 1 to 25% by weight of an organic amine compound; 40 to 90% by weight of an amide compound; And 5 to 35% by weight of an organic solvent.

The alkali metal hydroxide is a component for penetrating the intaglio plate having the fine pattern formed thereon and the interface between the ink remaining on the intaglio plate and swelling them and removing them from the intaglio plate. In particular, in the step of rinsing the intaglio plate treated with the cleaning liquid composition, So that the pigment is easily removed.

Examples of the alkali metal hydroxide include lithium hydroxide, sodium hydroxide and potassium hydroxide. These alkali metal hydroxides may be used alone or in admixture of two or more.

The alkali metal hydroxide is preferably contained in an amount of 0.1 to 10% by weight, more preferably 0.1 to 5% by weight, based on 100% by weight of the total amount of the offset printing plate precursor cleaning composition. If the content is less than 0.1% by weight, the removal power of the pigment remaining on the surface of the intaglio plate after rinsing the ink after swelling the ink may be lowered. If it exceeds 10% by weight, alkali metal may be precipitated during the cleaning process, And the layer separation phenomenon may occur during long-term storage, thereby deteriorating performance.

The organic amine compound swells the solidified ink remaining on the intaglio plate and smoothes the dispersion of the pigment contained in the ink so that the ink dissolved in the rinsing process after the cleaning is removed without being reabsorbed on the intaglio plate.

Examples of the organic amine compound include compounds represented by the following formula (1): < EMI ID =

[Chemical Formula 1]

Wherein R ₁ to R ₃ are independently a hydrogen atom, a substituted or unsubstituted alkyl or hydroxyalkyl group having 1-10 carbon atoms, a substituted or unsubstituted alkenyl or hydroxyalkenyl group having 2-10 carbon atoms, a carboxyl group, A substituted or unsubstituted cycloalkyl group or a hydroxycycloalkyl group having 5 to 8 carbon atoms, a phenyl group or a benzyl group. When these R ₁ to R ₃ are substituted, an alkyl group having 1 to 10 carbon atoms substituted or unsubstituted with an amino group, a carboxyl group, a hydroxy group, an alkyl group having 1 to 10 carbon atoms, a hydroxyl group or a substituted or unsubstituted alkoxy group having 1 to 4 carbon atoms May be substituted with an alkyl group having from 1 to 10 carbon atoms substituted with a group.

The compound represented by the general formula (1) is preferably a compound represented by the following general formula (1): methylamine, ethylamine, monoisopropylamine, n-butylamine, sec-butylamine, isobutylamine, t-butylamine, pentylamine, monoethanolamine, Amino-1-butanol, 2- (2-aminoethoxy) ethanol, methyl (methoxymethyl) aminoethane, Primary amine compounds such as methyl (methoxymethyl) aminoethanol and methyl (butoxymethyl) aminoethanol; There may be mentioned dimethylamine, diethylamine, dipropylamine, diisopropylamine, dibutylamine, diisobutylamine, methylethylamine, methylpropylamine, methylisopropylamine, methylbutylamine, methylisobutylamine, diethanolamine , Secondary amine compounds such as 2- (ethylamino) ethanol, 2- (methylamino) ethanol and dibutanolamine; But are not limited to, trimethylamine, triethylamine, tripropylamine, tributylamine, tripentylamine, dimethylethylamine, methyldiethylamine, methyldipropylamine, triethanolamine, N-methyldiethanolamine, N, (Methoxymethyl) diethylamine, (methoxymethyl) diethanolamine, and (hydroxyethyloxymethyl) diethylamine, and the like such as N, N-diethylethanolamine, (butoxymethyl) diethylamine, And amine compounds. These may be used alone or in admixture of two or more.

The organic amine compound is preferably contained in an amount of 1 to 40% by weight, more preferably 1 to 25% by weight, and most preferably 3 to 15% by weight based on 100% by weight of the total amount of the offset printing plate precursor cleaning composition . If the content is less than 1% by weight, the ink remaining on the intaglio can not be sufficiently swollen to deteriorate the ink removing ability. If the content is more than 40% by weight, further improvement effect is not obtained.

The amide-based compound is a strong alkaline aprotic polar solvent, and is an organic solvent component which is highly effective in dissolving the resin contained in the ink remaining in the intaglio plate and which further improves the dispersion of the pigment and improves the ink removing power.

Examples of the amide compound include compounds represented by the following formula (2): < EMI ID =

(2)

Wherein R ₄ and R ₅ are independently a hydrogen atom; An alkyl group or a hydroxyalkyl group having 1-10 carbon atoms; An alkenyl group having from 2 to 10 carbon atoms; A carboxy group; An alkyl group having 1-10 carbon atoms substituted with an alkoxy group having 1-10 carbon atoms; An amino group substituted or unsubstituted with an alkyl group having 1 to 4 carbon atoms; Or a cycloalkyl group or a hydroxycycloalkyl group substituted or unsubstituted with an alkyl group having 1 to 4 carbon atoms. Further, R ₄ and R ₅ may form a ring together.

Examples of the compound represented by the general formula (2) include formamide, N-methylformamide, N, N-dimethylformamide and the like, which may be used alone or in combination.

The amide compound is preferably contained in an amount of 50 to 90% by weight, more preferably 60 to 80% by weight, based on 100% by weight of the total amount of the offset printing plate precursor cleaning composition. When the content is less than 50% by weight or more than 90% by weight, it is difficult to secure a fast and uniform dissolution power for the black ink for BM and for each resin contained in red, green and blue ink for RGB, It is difficult to realize a desired cleaning speed.

The organic solvent is an additional component for preventing the dissolved ink from being reabsorbed on the intaglio plate by removing the ink remaining on the intaglio by the rinsing process after the rinsing process.

As the organic solvent, both quantum and aprotic polar solvents can be used.

Examples of the protonic polar solvent include ethylene glycol monomethyl ether, diethylene glycol monomethyl ether, triethylene glycol monomethyl ether, polyethylene glycol monomethyl ether, ethylene glycol monoethyl ether, diethylene glycol monoethyl ether, ethylene glycol monobutyl ether , Diethylene glycol monobutyl ether, triethylene glycol monobutyl ether, propylene glycol monomethyl ether, and dipropylene glycol monomethyl ether; And alcoholic compounds such as propanol, butanol, isopropanol, and tetrahydroperfuryl alcohol. Examples of aprotic polar solvents include pyrrolidone compounds such as N-methylpyrrolidone and N-ethylpyrrolidone; Imidazolidinone compounds such as 1,3-dimethyl-2-imidazolidinone and 1,3-dipropyl-2-imidazolidinone; lactone-based compounds such as? -butyrolactone; Sulfoxide compounds such as dimethyl sulfoxide and sulfolane; Phosphate-based compounds such as triethyl phosphate, tributyl phosphate and the like; Carbonate-based compounds such as dimethyl carbonate and ethylene carbonate; cresol compounds such as 慣 -cresol, m-cresol and ρ-cresol, and the like. These may be used alone or in combination of two or more.

The organic solvent is preferably contained in an amount of 5 to 35% by weight, more preferably 10 to 25% by weight, based on 100% by weight of the total amount of the offset printing plate precursor cleaning composition. When the content is less than 5% by weight, the solubility of the resin contained in the ink remaining in the intaglio may be insufficient. When the content exceeds 35% by weight, the solubility of the alkali metal hydroxide component in the cleaning liquid is lowered, A phenomenon may occur or an alkali metal may be precipitated and the performance of the cleaning liquid may deteriorate.

The offset printing plate precursor cleaning composition of the present invention containing such components may have a pH of 12 or higher, preferably 12-14.

The offset printing offset cleaning liquid composition of the present invention can remove both the solidified ink remaining on the scaffold, that is, both the RGB ink and the ink for RGB uniformly and rapidly at the same time without damaging the scaffold. In particular, since the ink can be directly dissolved and removed as an organic cleaning liquid, it can be directly applied not only after the printing process but also on in-line in the printing process, thereby improving the process yield and productivity. In addition, the ink dissolved through cleaning can be easily removed through a rinsing process, so that the dissolved ink can be prevented from being adsorbed on the intaglio to contaminate the intaglio, thereby ensuring reproducibility of the print pattern.

The above offset printing plate precursor cleaning composition of the present invention can be produced by a conventional method.

The present invention provides a cleaning method comprising the step of dissolving and removing the ink remaining on the intaglio plate with the offset printing preparative cleaning fluid composition.

In particular, the cleaning method of the present invention is characterized in that the cleaning process can be introduced not only after the offset printing process but also during the offset printing process by using the organic cleaning liquid composition. That is, the cleaning liquid composition may be treated on the intaglio plate in-line during the offset printing process to remove the solidified ink remaining on the intaglio plate by directly dissolving it at a rapid and uniform rate. In this way, reproducibility of the print pattern can be ensured and at the same time, the takt-time can be reduced and the process yield and productivity can be greatly improved.

As a method for cleaning the offset printing intaglio plate using the cleaning liquid composition of the present invention, for example, there are a method of directly immersing the intaglio plate containing the ink remaining in the fine pattern in the cleaning liquid composition, a method of spraying the cleaning liquid composition on the intaglio plate, And a method of brushing after applying the composition. These methods may be used in combination. At this time, bubbles or ultrasonic waves may be applied to enhance the cleaning effect.

In addition, the use conditions (temperature, time, etc.) of the cleaning liquid composition are not particularly limited and may be appropriately selected depending on the content and concentration of the ink remaining on the intaglio plate, Lt; 0 > C to 25 < 0 > C to 60 < 0 > C for 10 seconds to 3 minutes.

After the intaglio plate is treated with the cleaning liquid composition of the present invention, a step of rinsing with water or an alcohol-based solvent may be further performed if necessary. At this time, deionized distilled water, for example, deionized distilled water for semiconductor processing, having a resistivity of 18 M / cm can be used as the water.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to be illustrative of the invention and are not intended to limit the scope of the claims. It will be apparent to those skilled in the art that such variations and modifications are within the scope of the appended claims.

Example

Example 1

5% by weight of potassium hydroxide, 15% by weight of N-methyldiethanolamine (MDEA) and 80% by weight of N-methylformamide (NMF) were mixed and stirred to prepare an offset printing plate cleaning liquid composition.

Example  2-10, Comparative Example  1-5

The cleaning liquid composition was prepared in the same manner as in Example 1 except that the components and the contents as shown in Table 1 below were used. Here, the content represents weight%.

division Alkali metal
Hydroxide Organic amine
compound Amide system
compound Organic solvent water KOH MDEA MEA NMF BDG NMP Example 1 5 15 - 80 - - - Example 2 2 10 - 70 18 - - Example 3 0.5 10 - 70 19.5 - - Example 4 7 10 - 70 13 - - Example 5 2 - 10 70 18 - - Example 6 2 5 - 70 23 - - Example 7 2 20 - 70 8 - - Example 8 2 10 - 62 26 - - Example 9 2 10 - 85 3 - - Example 10 2 10 - 70 - 18 - Comparative Example 1 - 10 - 70 20 - - Comparative Example 2 5 - - 75 20 - - Comparative Example 3 10 - 20 - 30 - 40 Comparative Example 4 2 10 - 30 18 - 40 Comparative Example 5 2 36 - 50 12 - - KOH: Potassium hydroxide
MDEA: N-methyldiethanolamine
MEA: Monoethanolamine
NMF: N-methylformamide
BDG: diethylene glycol monobutyl ether
NMP: N-methylpyrrolidone

Test Example

1. Cleaning ability

In order to evaluate the cleaning ability of the red, green and blue inks used for offset printing and the black ink for BM, as shown in Fig. 1, a color filter having a long side of 130 mu m, a short side of 30 mu m, and a height of 20-30 mu m A pixel-shaped fine pattern was formed on a glass substrate to produce a test board for test evaluation similar to that of an intaglio offset printing intaglio. (PCF-R-001, Dongwoo Fine-Chem), green ink (PCF-G-001, Dongwoo Fine-Chem Co., Ltd.), blue ink (PCF-B- (PCF-BM-001, Dongwoo Fine-Chem Co., Ltd.) were coated in a fine pattern and then dried at 100 ° C for 3 minutes to prepare test pieces.

The prepared specimens were immersed in the cleaning composition at room temperature for a certain period of time (10 seconds, 20 seconds), and then the specimens were taken out and rinsed with deionized distilled water for 20 seconds. After the rinse was completed, the specimen was completely dried using nitrogen.

Optical microscope photographs of the dried specimens were taken and evaluated for their cleaning ability based on the following criteria.

<Evaluation Criteria>

◎: ink is completely removed.

○: Excellent removal of ink.

?: A small amount of ink remained.

X: A large amount of ink remains.

2. Scab injury

The specimens prepared in 1 above were immersed in a cleaning composition at room temperature for a certain period of time (1 hour, 6 hours), and then the specimens were taken out and rinsed with deionized distilled water for 20 seconds. After the rinse was completed, the specimen was completely dried using nitrogen.

Scanning electron microscopy (SEM, Hitach S-4700) photographs of the dried specimens were taken and evaluated for damage to the intact plaques based on the following criteria.

<Evaluation Criteria>

◎: no intaglio damage at all.

○: Almost no intaglio damage.

△: Some scratches damaged.

X: There is a large amount of intaglio damage.

division Cleaning ability Scab injury Red ink Green ink Blue ink Black ink 10 seconds 20 seconds 10 seconds 20 seconds 10 seconds 20 seconds 10 seconds 20 seconds 1 hours 6 hours Example 1 ◎ ◎ ○ ◎ ◎ ◎ ○ ◎ ◎ ◎ Example 2 ◎ ◎ ◎ ◎ ○ ◎ ○ ◎ ◎ ◎ Example 3 ○ ◎ ○ ◎ ○ ◎ ○ ○ ◎ ◎ Example 4 ◎ ◎ ○ ◎ ◎ ◎ ○ ◎ ◎ ◎ Example 5 ○ ◎ ○ ◎ ◎ ◎ ○ ◎ ◎ ◎ Example 6 ○ ◎ ○ ◎ ◎ ◎ ○ ○ ◎ ◎ Example 7 ○ ◎ ○ ○ ○ ◎ ○ ◎ ◎ ◎ Example 8 ○ ◎ ○ ◎ ◎ ◎ ○ ◎ ◎ ◎ Example 9 ○ ○ ○ ○ ○ ◎ ○ ○ ◎ ◎ Example 10 ○ ◎ ○ ◎ ◎ ◎ ○ ◎ ◎ ◎ Comparative Example 1 △ ○ × △ △ ○ × △ ◎ ◎ Comparative Example 2 × △ × × △ ○ × △ ◎ ◎ Comparative Example 3 × × × × × × × △ ◎ ◎ Comparative Example 4 × × × × × △ × × ◎ ◎ Comparative Example 5 × △ △ △ △ ○ △ ○ ◎ ◎

As shown in Table 2, the cleaning liquid compositions of Examples 1 to 10, in which the alkali metal hydroxide, the organic amine compound and the amide compound, and the organic solvent were further contained therein in a certain amount, Compared with the cleaning liquid composition of the present invention, the ink remaining on the intaglio plate was excellent in overall removing power without damaging the intaglio plate even when immersed for a long time.

In particular, a cleaning liquid composition comprising 0.1 to 5 wt% of an alkali metal hydroxide, 3 to 15 wt% of an organic amine compound, 60 to 80 wt% of an imide compound, and 5 to 35 wt% of an organic solvent, , Green, blue, and black inks because of their excellent uniformity and fast cleaning ability.

FIG. 2 shows an optical microscope photograph of a specimen cleaned for 20 seconds using the cleaning composition of Example 1 of the present invention. Accordingly, in the case of using the cleaning liquid composition according to the present invention, the black ink present in the specimen, especially in the fine pattern, was removed, and the shape of the specimen as shown in Fig. 1 was clearly confirmed.

FIG. 3 shows an optical microscope photograph of a specimen cleaned for 20 seconds using the cleaning composition of Comparative Example 3. FIG. When the cleaning liquid composition of Comparative Example 3 was used, it was found that not only the inside of the fine pattern of the test piece but also the black ink for BM present outside was removed.

3. Process yield, productivity

The prepared cleaning liquid composition was directly introduced and evaluated under the process conditions equivalent to the in-line image in the offset printing process. At this time, a blue ink and a black ink were typically selected and applied to the ink. The intaglio plate immediately after printing in in-line form was cleaned by a spray method using a cleaning liquid composition at a pressure of 0.5 MPa, and the cleaning time was set to 5 seconds, 10 seconds, and 20 seconds. After rinsing, it was rinsed with deionized distilled water at the same pressure of 0.5 MPa for 20 seconds by spraying method, and then completely dried with nitrogen. The offset printing process was successively performed 20 times each using the dried intaglio.

The number of prints which were not determined to be defective after printing using a washed and dried intaglio plate was calculated as the process yield (%).

division Process yield (%) Blue ink Black ink 5 seconds 10 seconds 20 seconds 5 seconds 10 seconds 20 seconds Example 1 90 95 95 80 85 95 Example 2 85 90 90 75 90 95 Example 5 90 90 95 70 85 90 Example 10 90 90 95 85 85 95 Comparative Example 1 45 50 80 35 65 70 Comparative Example 2 30 45 65 30 55 60 Comparative Example 3 - 20 30 - 15 35 Comparative Example 4 - 20 40 - 10 30

As shown in Table 3, the cleaning process was continuously introduced in the inline line during the intaglio offset printing process. As a result, the cleaning liquid composition of the Example was not only able to apply the continuous process, Reproducibility can be ensured and the process time and productivity can be improved by reducing the tack time. On the other hand, the cleaning liquid compositions of Comparative Examples 1 and 2 did not have uniform removal rates for all the inks, and Comparative Examples 3 and 4 were difficult to introduce directly into the in-line process as an aqueous cleaning liquid, I did not.

Claims (12)

As cleaning compositions for RGB inks and black inks for black matrix (BM)
0.1 to 10% by weight of an alkali metal hydroxide; 1 to 40% by weight of an organic amine compound; And 50 to 90% by weight of an amide compound.
The offset printing plate precursor cleaning composition according to claim 1, further comprising an organic solvent.
The organic solvent according to claim 2, wherein the organic solvent is selected from the group consisting of an ether compound, an alcohol compound, a pyrrolidone compound, an imidazolidinone compound, a lactone compound, a sulfoxide compound, a phosphate compound, a carbonate compound, Lt; RTI ID = 0.0 &gt; 1, &lt; / RTI &gt;
The composition according to claim 2, wherein the alkali metal hydroxide is 0.1 to 10% by weight; 1 to 25% by weight of an organic amine compound; 50 to 90% by weight of an amide compound; And 5 to 35% by weight of an organic solvent.
5. The composition of claim 4, further comprising 0.1 to 5% by weight of an alkali metal hydroxide; 3 to 15% by weight of an organic amine compound; 60 to 80% by weight of an amide compound; And 10 to 25% by weight of an organic solvent.
The offset printing puddle washing liquid composition according to claim 1, wherein the alkali metal hydroxide is at least one selected from the group consisting of lithium hydroxide, sodium hydroxide and potassium hydroxide.
The offset printing plate precursor cleaning composition according to claim 1, wherein the organic amine compound is a compound represented by the following Formula 1:
[Chemical Formula 1]

(Wherein R ₁ to R ₃ are independently a hydrogen atom, a substituted or unsubstituted alkyl or hydroxyalkyl group having 1-10 carbon atoms, a substituted or unsubstituted alkenyl or hydroxyalkenyl group having 2-10 carbon atoms, a carboxyl group , A substituted or unsubstituted cycloalkyl group or a hydroxycycloalkyl group having 5 to 8 carbon atoms, a phenyl group or a benzyl group, and when R ₁ to R ₃ are substituted, an amino group substituted or unsubstituted with an alkyl group having ₁ to 4 carbon atoms, , A hydroxy group, an alkyl group having 1-10 carbon atoms, or an alkyl group having 1-10 carbon atoms substituted with an alkoxy group having 1-10 carbon atoms which is substituted or unsubstituted with a hydroxy group).
[Claim 7] The method according to claim 7, wherein the compound represented by the formula (1) is at least one compound selected from the group consisting of methylamine, ethylamine, monoisopropylamine, n-butylamine, sec-butylamine, isobutylamine, t-butylamine, pentylamine, Propanol, 3-amino-1-propanol, 4-amino-1-butanol, 2- (2-aminoethoxy) ethanol, methyl (Methoxymethyl) aminoethanol, methyl (butoxymethyl) aminoethanol, dimethylamine, diethylamine, dipropylamine, diisopropylamine, dibutylamine, diisobutylamine, methylethyl (2-ethylamino) ethanol, 2- (methylamino) ethanol, dibutanolamine, trimethylamine, triethylamine, diethylamine, diethylamine, , Tripropylamine, tributylamine, tripentylamine, dimethylethylamine, methyldi N-dimethylethanolamine, N, N-diethylethanolamine, (butoxymethyl) diethylamine, (methoxymethyl) di (Methoxymethyl) diethanolamine, and (hydroxyethyloxymethyl) diethylamine. The composition of claim 1,
The offset printing plate precursor cleaning composition according to claim 1, wherein the amide compound is a compound represented by the following formula (2):
(2)

(Wherein R ₄ and R ₅ are independently a hydrogen atom, an alkyl group or a hydroxyalkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, a carboxy group having 1 to 10 carbon atoms substituted with an alkoxy group having 1 to 10 carbon atoms An alkyl group, an amino group substituted or unsubstituted with an alkyl group having 1 to 4 carbon atoms, or a cycloalkyl group or a hydroxycycloalkyl group substituted or unsubstituted with an alkyl group having 1 to 4 carbon atoms).
[10] The composition for offset printing as claimed in claim 9, wherein the compound represented by the general formula (2) is at least one selected from the group consisting of formamide, N-methylformamide and N, N-dimethylformamide.
A cleaning method comprising the step of dissolving and removing an ink remaining on an intaglio plate with an offset printing offset cleaning liquid composition according to any one of claims 1 to 10.
12. The cleaning method according to claim 11, which is carried out continuously on an in-line during an offset printing process.

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