JPH08337794A - Detergent liquid for screen printing plate - Google Patents

Abstract

PURPOSE: To obtain the subject detergent liquid capable of promoting ink swelling effect, excellent in the ink cleansing ability and low remaining thereof on screen printing plates, thus reduced in washing water, comprising a polyhydric alcohol, an acetylene-based polyhydric alcohol or a nonionic surfactant and water. CONSTITUTION: This detergent liquid comprises (A) pref. 50-95wt.% of a polyhydric alcohol (derivative) except acetylene-based ones (derivatives) [e.g. ethylene glycol (monomethyl ether), glycerol, ethylene glycol monoacetate], (B) pref. 0.01-5.0wt.% of an acetylene-based polyhydric alcohol (derivative) or an acetylene-based nonionic surfactant (e.g. 3-methyl-1-butyn-3-ol, 2,4,7,9- tetramethyl-5-decyne-4,7-diol) and (C) pref. the balance water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning liquid for ink which adheres to a screen-printed plate printed with a screen-printing ink.

[0002]

2. Description of the Related Art The screen printing method is a very old method, but it is an excellent printing method for obtaining a large amount of the same pattern, and is still widely used in all fields. In particular, recently, it has been widely used mainly in the electronics industry, which is said to be a high technology, because it can print fine patterns with high density and high precision. Conventionally, a chlorine-based solvent has been mainly used as a cleaning liquid for screen printing plates.
However, while these solvents have excellent cleaning performance, they also cause global environmental problems that cause ozone layer depletion in the stratosphere, and in recent years, there has been an increasing demand for aqueous cleaning solutions that replace these organic solvents.

[0003]

SUMMARY OF THE INVENTION In the present invention,
As a cleaning method instead of a chlorine-based solvent for cleaning the ink that adheres to the plate after screen printing, it has a cleaning power superior to that of a chlorine-based solvent and has less toxicity and less odor etc.
It is intended to provide a water-based cleaning liquid for a screen printing plate which can be applied to various cleaning means such as spraying.

[0004]

SUMMARY OF THE INVENTION The inventors of the present invention have earnestly studied a water-based cleaning liquid suitable for a cleaning liquid for ink adhering to a screen plate that does not damage the environment, and as a result, the present invention has been completed. That is, the present invention, at least one of polyhydric alcohols and derivatives thereof excluding acetylene-based alcohols, at least one of acetylene-based polyhydric alcohols or derivatives thereof, and acetylene-based nonionic surfactant, A composition of a screen plate cleaning liquid containing water.

The first feature of the present invention is to use a water-soluble polyhydric alcohol or a derivative thereof (excluding acetylene-based polyhydric alcohol and its derivative) capable of dissolving a hydrophobic ink. In particular, it is optimal that the polyhydric alcohol or its derivative can be easily mixed with water and has the action of swelling the ink. Examples of the polyhydric alcohol or its derivative in the present invention include ethylene glycol, propylene glycol, butylene glycol, 3,
Alkylene glycols such as 4-hexylene glycol and octylene glycol; dialkylene glycols such as diethylene glycol and dipropylene glycol; and trialkyl glycols such as triethylene glycol. Furthermore, trihydric alcohols such as glycerin, and polyhydric alcohols such as pentit and hexite can also be used. Derivatives of these polyhydric alcohols such as mono- or dialkyl ethers, mono- or diesters, ether esters are also preferably used. Preferred derivatives include ethylene glycol monomethyl ether, ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether, ethylene glycol diethyl ether, ethylene glycol monoethyl ether acetate, ethylene glycol isopropyl ether, ethylene glycol monobutyl ether, ethylene glycol dibutyl ether, ethylene. Glycol monobutyl ether acetate, ethylene glycol isoamyl ether, ethylene glycol monohexyl ether, methoxymethoxyethanol, ethylene glycol monoacetate, ethylene glycol diacetate, ethylene chlorohydrin, diethylene glycol monomethyl ether, diethylene glycol dimethyl ether
Diethylene glycol monoethyl ether, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, diethylene glycol methyl ethyl ether, diethylene glycol diethyl ether, diethylene glycol monobutyl ether, diethylene glycol monobenzyl ether, diethylene glycol dibutyl ether, diethylene glycol monoacetate, triethylene glycol monomethyl ether, triethylene Glycol monoethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monobutyl ether, propylene glycol monophenyl ether, 1-butoxyethoxy propanol, propylene Recall monoacetate, dipropylene glycol monoethyl ether.
In addition, glycerin ester derivatives such as glyceryl monoacetate, glyceryl diacetate and glyceryl triacetate, glycerin ether derivatives, and polyhydric alcohol ether and ester derivatives can also be used.

The second feature of the present invention resides in the combined use of an acetylene-based polyhydric alcohol or its derivative and / or an acetylene-based nonionic surfactant. This has the effect of imparting excellent wettability to the hydrophobic ink, promoting the swelling action of the polyhydric alcohol or its derivative described above, and improving the cleaning effect. In addition, it also acts to defoam bubbles generated by spraying etc. during cleaning, reducing the amount of cleaning liquid remaining on the screen plate, thus reducing the amount of cleaning liquid brought into the washing process after cleaning and reducing the burden of water in the washing process. To do. If acetylene-based polyhydric alcohol or the like is not used, the cleaning time cannot be shortened remarkably.
Examples of the acetylenic polyhydric alcohol or its derivative in the present invention include 3-methyl-1-butyne-3-
All, 3-methyl-1-pentyn-3-ol, 3,
Acetylene alcohols such as 5-dimethyl-1-hexyn-3-ol; eg 2,5-dimethyl-3-hexyne-2,5-diol, 3,6-dimethyl-4-octyne-3,6-diol. Such as acetylene glycol; for example, acetylene-based nonionic surfactants such as 2,4,7,9-tetramethyl-5-decyne-4,7-diol.

The above polyhydric alcohols and their derivatives (other than acetylene-based polyhydric alcohols or their derivatives)
Can be used alone or in combination of two or more with an acetylene-based polyhydric alcohol or a derivative thereof and / or an acetylene-based nonionic surfactant, and the compounding amount thereof is 50 wt% to 95 wt%, preferably 60 wt%. % ~
90 wt%. The balance is water and the blending amount is 5 wt% ~
It is 50 wt% and preferably 10 wt% to 40 wt%. If the blending amount is 50 wt% or less, the effect of swelling the ink is insufficient, and if it is 95 wt% or more, the effect is saturated, which is not preferable. The compounding ratio of the acetylene-based polyhydric alcohol or its derivative and / or the acetylene-based nonionic surfactant may be very small, generally 0.01 to 5.0 w.
t%, and more preferably 0.05 to 0.5 wt%.
If it is less than this ratio, it is not possible to have a sufficient effect on the wettability of the ink, and if it is more than this ratio, although it has defoaming properties, temporary bubbles tend to be generated by spraying or the like.

[0008]

EXAMPLES The present invention will be described in more detail with reference to examples below, but the present invention is not limited to these examples. (Example 1) A UV-curable solder resist ink UV150G (manufactured by Taiyo Ink Mfg. Co., Ltd.) was evenly applied to a Tetoron 200 mesh screen plate using a squeegee and left for 24 hours.
Spray pressure of 3 Kg / cm ² , bath temperature of 30 ° C.,
Spraying treatment was carried out for 2 minutes and the cleaning property was evaluated.

(Example 2) Thermosetting solder resist ink S222 on a 250 mesh screen plate made by Tetoron
STIBR (manufactured by Taiyo Ink Mfg. Co., Ltd.) was uniformly applied using a squeegee, and the screen plate left for 48 hours was washed with wash liquids 1 to 9 shown in Table 1 at a bath temperature of 35 ° C. for 1 minute,
Ultrasonic cleaning was performed to evaluate the cleaning. (2- in Table 2
(B)) Then, each of the above-mentioned solder resist inks
The same test was carried out by dissolving 0% by weight to evaluate the durability of the cleaning liquid (2- (b) in Table 2).

Example 3 A thermosetting solder resist ink S-10 was applied to a Tetoron 200 mesh screen plate.
YO (manufactured by Taiyo Ink Mfg. Co., Ltd.) was evenly applied using a squeegee, and left for 48 hours. A screen plate was spray-treated at 2 Kg / cm ^{2 at} a bath temperature of 30 ° C. for 2 minutes to evaluate the cleaning property. The results are shown in Table 2.

(Comparative Example 1) Examples 1 to 3 were carried out and evaluated in the same manner using CFC 113 as the cleaning liquid, and the results are shown in Table 2.

(Comparative Example 2) Using 1,1,1-trichloroethane as a cleaning liquid, evaluation was performed in the same manner as in Examples 1 to 3, and the results are shown in Table 2.

[0013]

[Table 1]

[0014]

[Table 2]

[0015]

The cleaning liquid of the present invention utilizes the action of allowing the polyhydric alcohol or its derivative to be easily mixed with water to swell the ink, and further, the acetylene-based polyhydric alcohol or its derivative and / or the acetylene-based nonionic interface. The activator imparts excellent wettability to the hydrophobic ink, accelerates the swelling action of the polyhydric alcohol or its derivative to improve the cleaning effect, and thus excellent cleaning for the ink adhering to the screen printing plate. It is possible to impart sex. In addition, acetylene-based polyhydric alcohols have the function of defoaming bubbles generated by spraying etc. during cleaning, and the amount of cleaning liquid remaining on the screen plate is reduced, so the amount of cleaning liquid brought into the washing process after cleaning is reduced and the washing process The burden of water in the area is reduced.

Claims (2)

[Claims] 1. At least one selected from polyhydric alcohols other than acetylene alcohols and derivatives thereof, and at least one selected from acetylene polyhydric alcohols, derivatives thereof and acetylene nonionic surfactants. A cleaning liquid for a screen printing plate, which contains water. 2. At least one selected from polyhydric alcohols and derivatives thereof excluding acetylene alcohols is 50 to 95 wt%, and at least one selected from acetylene polyhydric alcohols, derivatives thereof and acetylene nonionic surfactants. The cleaning liquid for a screen printing plate according to claim 1, which contains 0.01 to 5.0 wt% of one kind, and the balance water.