KR101711151B1 - Strip composition for copper plating and method for recycling of gravure printer-cylinder - Google Patents

Abstract

The present invention relates to a reducing method of a cylinder for a gravure printer. The reusing method comprises: an aging process (S210); a copper plating layer peeling process (S220); a washing process (S230); and a degreasing process (S240). A solvent of solution of the composition for peeling copper plating uses water to solve a problem of environmental pollution.

Description

TECHNICAL FIELD [0001] The present invention relates to a composition for stripping copper plating and a method for reusing a cylinder for a gravure printing machine,

The present invention relates to a method for reusing a cylinder for a gravure printing machine, and more particularly, to a cylinder for a gravure printing machine capable of reusing a steel cylinder by separating a steel cylinder and a copper plating layer from a cylinder for a gravure printing machine using a composition for peeling off a copper plating And a method of reusing the same.

Recently, a cylinder for a gravure printer having a copper plating layer formed by a special printing method is generally used. The cylinders for the gravure printer in which the copper plating layer is formed are steel cylinders cast by steel. A nickel plating layer is formed on the surface of the steel cylinder, a copper plating layer is formed on the nickel plating layer, and a chromium plating layer is formed on the copper plating layer. Here, the copper plating layer and the chromium plating layer are subjected to a post-treatment process for printing.

On the other hand, in a cylinder for a gravure printing machine in which a printing operation is completed, a chemical peeling method is generally used in which a copper plating layer is peeled off by chemical treatment by a method of peeling off a copper plating layer. For example, a method of forming a layer by depositing film developing wastewater on a nickel plating layer and forming a copper plating layer thereon was mainly used. After the printing process is completed, the copper plating layer is peeled off and recycled. In the case of the conventional chemical stripping method using film developing wastewater, since the components and physical properties of the wastewater are not always uniform, it is not easy to apply the coating on the nickel plating layer. In addition, since the film developing wastewater and a large amount of hydrochloric acid are used in the peeling process, hydrochloric acid gas is generated and the workability of the operator is greatly reduced.

Therefore, there is a need to develop a technique that can easily peel off the copper plating layer without harming the health of workers in the peeling process.

KR 10-2007-0105088 A (October 18, 2007)

DISCLOSURE Technical Problem The present invention has been conceived to solve the above-mentioned problems, and it is an object of the present invention to provide a method for separating a steel cylinder and a copper plating layer from a cylinder for a gravure printing machine using a composition for copper plating, A composition for peeling off copper plating and a gravure printing method for improving the workability and safety of a worker through a peeling process using water without using hydrochloric acid as a solvent for the peeling composition and for increasing the degree of recycling of the peeled copper plating layer And a method for reusing a cylinder for use.

The characteristic configuration of the present invention for realizing the above-mentioned object of the present invention and realizing the characteristic effect of the present invention described below is as follows.

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A method of reusing a cylinder for a gravure printer according to an embodiment of the present invention includes a steel cylinder 10, a nickel plated layer 20 formed on the outer circumferential surface of the iron cylinder 10, a copper layer 20 formed on the outer circumferential surface of the nickel plated layer 20, A method for reusing a cylinder (100) for a gravure printer comprising a plating layer (30) and a chromium plating layer (40) formed on an outer circumferential surface of the copper plating layer (30) An aging step (S210) of immersing in a container containing a composition for stripping copper plating, which is an aqueous solution containing a sulfonic acid, for a predetermined time; After the predetermined time has elapsed in the aging process (S210), the cylinder (100) for the gravure printer is removed from the container and the copper plating layer (30) is peeled from the iron cylinder (10) or from the nickel plating layer Copper plating layer peeling process (S220); A cleaning process S230 for pickling up the iron cylinder 10 from which the conventional printing coating film and the chromium plating layer 40 have been removed in the copper plating layer peeling process S220, and then washing with water to remove foreign substances; And a degreasing step (S240) of immersing the surface-washed iron cylinder (10) in the electrolytic solution in the cleaning step (S230) and removing the organic matter remaining on the surface through the electrolytic method, wherein the aging step The method further comprises vibrating the cylinder 100 for the gravure printer through the ultrasonic oscillator in step S210, wherein water is used as a solvent of the aqueous solution of the composition for stripping copper plating, to solve the environmental pollution problem, Wherein the organic sulfonic acid has a mass% concentration of 20% or more and less than 40%, and the organic sulfonic acid is an aliphatic sulfonic acid having at least one substance selected from the group consisting of methanesulfonic acid, ethanesulfonic acid, methane disulfonic acid and ethylmethylsulfonic acid The present invention also provides a method of reusing a cylinder for a gravure printer.

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The aging process may be performed at a temperature of not less than 40 seconds but less than 1 minute and a temperature of 10 degrees or more and less than 30 degrees.

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According to the present invention, the workability of the operator can be improved through the peeling process without using hydrochloric acid, and the degree of recycling of the peeled copper plating layer can be enhanced.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a partial front sectional view showing a coating film on the surface of a cylinder for a gravure printer according to an embodiment of the present invention;
2 is a flow chart illustrating a method of recycling a cylinder for a gravure printer according to one embodiment of the present invention.

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with one embodiment. It should also be understood that the position or arrangement of individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the present invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which the claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

The terms used in the present invention, on the other hand, are used only to illustrate specific embodiments and are not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. It is also to be understood that the terms "comprises" or "having ", and the like in the specification are intended to specify the presence of stated features, integers, But do not preclude the presence or addition of features, numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be interpreted as ideal or overly formal in the sense of the present invention Should not.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a partial front sectional view showing a coating film on the surface of a cylinder for a gravure printer according to an embodiment of the present invention.

1, a cylinder 100 for a gravure printing machine includes a steel cylinder 10, a nickel plating layer 20 formed on the outer circumferential surface of a steel cylinder by a nickel plating process, a copper plating process on the outer circumferential surface of the nickel plating layer 20 And a chromium plating layer 40 formed on the outer circumferential surface of the copper plating layer 30 and the copper plating layer 30 by chromium plating.

The copper plating peeling composition according to the embodiment of the present invention can be used to separate and peel the copper plating layer 30 of the cylinders 100 for a gravure printer used for printing from the iron cylinder 10 or the nickel plating layer 20 have.

In addition, the composition for stripping copper plating according to an embodiment of the present invention may be an aqueous solution containing an organic sulfonic acid. More specifically, the composition for peeling off the copper plating may contain an organic sulfonic acid as a main component.

Water may be used as an aqueous solvent of an aqueous solution according to an embodiment of the present invention. More specifically, since the composition for peeling off copper plating uses water, which is an aqueous solvent, as a solvent, problems of environmental pollution and workability of workers are less than those of conventional peeling processes using hydrochloric acid.

In the copper plating stripping composition according to the embodiment of the present invention, the organic sulfonic acid may have a concentration of 10% or more and less than 50% by mass. When the composition for copper plating peeling in this concentration range is used, the copper plating layer can be easily peeled off. Further, it is more preferable to use a composition for peeling a copper plating having a concentration of an organic sulfonic acid of 20% or more and less than 40% by mass.

Also, the organic sulfonic acid according to an embodiment of the present invention may be an aliphatic sulfonic acid. More specifically, the organic sulfonic acid may comprise at least one material selected from the group consisting of methane sulfonic acid, ethane sulfonic acid, methane disulfonic acid and ethyl methyl sulfonic acid among the aliphatic sulfonic acids.

2 is a flowchart illustrating a method of recycling a cylinder for a gravure printer according to an embodiment of the present invention.

First, a cylinder recycling method for a gravure printer according to an embodiment of the present invention is directed to a cylinder 100 for a gravure printing machine used for printing. The cylinder 100 for a gravure printer includes a steel cylinder 10, a nickel plating layer 20 formed on the outer circumferential surface of the iron cylinder 10, a copper plating layer 30 formed on the outer circumferential surface of the nickel plating layer and a chromium plating layer 30 formed on the outer circumferential surface of the copper plating layer 30. [ (40).

The method for recycling a cylinder for a gravure printer according to an embodiment of the present invention includes the steps of immersing a cylinder 100 for a gravure printing machine used for printing in a vessel containing a composition for peeling off copper, The process S210 may be performed.

The copper plating peeling composition used in the aging step (S210) according to the embodiment of the present invention may be an aqueous solution containing an organic sulfonic acid. More specifically, The composition for peeling off the copper plating may contain an organic sulfonic acid as a main component. Here, water may be used as the aqueous solvent of the aqueous solution.

Also, in the composition for stripping copper plating according to an embodiment of the present invention, the organic sulfonic acid may have a mass concentration of less than 10% and less than 50%.

Also, the organic sulfonic acid according to an embodiment of the present invention may be an aliphatic sulfonic acid. More specifically, the organic sulfonic acid may comprise at least one material selected from the group consisting of methane sulfonic acid, ethane sulfonic acid, methane disulfonic acid and ethyl methyl sulfonic acid among the aliphatic sulfonic acids.

In addition, the aging process (S210) according to the embodiment of the present invention may further include a vibration process of vibrating the cylinder 100 for a gravure printer through an ultrasonic oscillator.

Also, the aging process (S210) according to the embodiment of the present invention may be performed at a temperature of 40 seconds or more and less than 1 minute and at a temperature of 10 degrees or more and less than 30 degrees.

Thereafter, the cylinder 100 for the gravure printing machine is removed from the container after the aging process (S210) has elapsed for a predetermined time, and the copper plating layer peeling (peeling off the copper plating layer 30 from the nickel cylinder layer 10 or the nickel plating layer 20) The process S220 may be performed.

Thereafter, in the copper plating layer peeling process (S220), a cleaning process (S230) is performed to pick up the iron cylinder from which the existing printing coating film (for example, the copper plating layer 30 and the chromium plating layer 40) Can be performed.

Thereafter, a degreasing process (S240) may be performed in which the surface-washed iron cylinder is immersed in the electrolytic solution in the cleaning process (S230) and then the organic matter remaining on the surface is removed through the electrolytic process.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Those skilled in the art will appreciate that various modifications and changes may be made thereto without departing from the scope of the present invention.

Therefore, the spirit of the present invention should not be construed as being limited to the above-described embodiments, and all of the equivalents or equivalents of the claims, as well as the following claims, I will say.

10: steel cylinder 20: nickel plated layer
30: Copper plated layer 40: Chrome plated layer
100: Cylinder for gravure printing machine

Claims (12)

delete delete delete delete delete A nickel plating layer 20 formed on an outer circumferential surface of the iron cylinder 10; a copper plating layer 30 formed on an outer circumferential surface of the nickel plating layer 20; a chromium plating layer 30 formed on an outer circumferential surface of the copper plating layer 30; 40), characterized in that the cylinder (100) for a gravure printer used for printing is immersed in a container containing a composition for peeling copper, which is an aqueous solution containing an organic sulfonic acid, for a predetermined time (S210); After the predetermined time has elapsed in the aging process (S210), the cylinder (100) for the gravure printer is removed from the container and the copper plating layer (30) is peeled from the iron cylinder (10) or from the nickel plating layer Copper plating layer peeling process (S220); A cleaning process S230 for pickling up the iron cylinder 10 from which the conventional printing coating film and the chrome plating layer 40 have been removed in the copper plating layer peeling process S220, And a degreasing process (S240) of immersing the iron cylinder 10 having the surface washed in the cleaning process (S230) in an electrolytic solution and then removing the organic matter remaining on the surface through the electrolytic process,
The method further comprises vibrating the cylinder 100 for the gravure printer through the ultrasonic oscillator in the aging step S210. The solvent of the aqueous solution of the composition for stripping copper plating may be water used to solve the environmental pollution problem , The organic sulfonic acid contained in the aqueous solution has a mass% concentration of 20% or more and less than 40%, and the organic sulfonic acid includes at least one substance selected from the group consisting of methanesulfonic acid, ethanesulfonic acid, methane disulfonic acid and ethylmethylsulfonic acid Wherein the aliphatic sulphonic acid is an aliphatic sulphonic acid.
delete The method according to claim 6,
A time of not less than 40 seconds and less than 1 minute, and a temperature of not less than 10 degrees and less than 30 degrees.
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