KR20090039170A - Method of pretreating mold for intaglio printing and intaglio printing method using the same - Google Patents

Abstract

A method of pre-treating on an intaglio printing mold and an intaglio printing method using the same are provided to progress a printing process without progressing a separate metering process by maintaining a state that ink is not remained on an embossed carving part. A method of pre-treating on an intaglio printing mold comprises a step for preparing a printing mold in which an intaglio printing pattern is formed(S1) and a step for coating a surface reforming agent on an upper side of the printing mold(S2). The printing mold is made of one selected among silicon system rubber, urethane rubber, acrylic rubber, butadiene rubber, fluorinated rubber, ethylenepropylene rubber, butyl rubber, chloroprene rubber, styrene-butadiene rubber, nitrile rubber and natural rubber.

Description

Method of pretreating mold for intaglio printing and intaglio printing method using the same}

The present invention relates to a pretreatment method for an intaglio printing mold and an intaglio printing method using the same, and more particularly, by treating a surface modifier on an upper surface of the intaglio printing mold, so that the applied ink does not remain in the embossed portion without a metering process. The present invention relates to an intaglio printing mold pretreatment method and an intaglio printing method using the same to provide an intaglio printing mold in which a printing process may be performed.

Background Art Various conventional printing methods such as screen printing and offset printing are used for forming printed circuits, forming circuit patterns on glass and ceramic plates, or forming resist patterns for etching metal plates. However, such a conventional printing method is suitable for the formation of a pattern having a relatively large line width, but it is difficult to realize a fine line width in forming a fine pattern having a line width of 200 μm or less, and is influenced by the fluidity of the ink and the pressure of the plate. Due to the problem that some of the ink is not completely transferred from the printing plate, many problems have been raised for the reproducibility of the printing pattern.

Conventionally, intaglio printing is used to form a fine pattern. However, when printing ink is applied to an upper surface of an intaglio printed mold, printing ink is filled only in the intaglio portion, and the intaglio portion should not have ink. As the ink filled in is transferred to the printed portion, a fine print pattern may be formed. Therefore, in the related art, after the ink is applied to the upper surface of the intaglio printing mold, a metering process of removing ink remaining in the embossed portion of the printing mold must be performed.

Specifically, such a metering process, according to the Republic of Korea Patent Publication No. 2006-0065009, to remove the printing material applied to the protruding embossed portion of the printing mold primarily using a remover, secondary adhesive tape or film Disclosed is a method of removing using. On the other hand, according to Korean Patent Publication No. 0153260, there is disclosed a method of scraping and removing unnecessary ink on the intaglio surface of the printing plate with a thin metal blade or the like. On the other hand, according to the Republic of Korea Patent Publication No. 2004-0042393, after the printing process, a pressure-sensitive adhesive film that compensates for the disadvantages such as waste water problems caused by cleaning the printing plate (mold) using a cleaning agent, a long time process required, etc. are disclosed. .

As described above, in the conventionally known metering process, a method of rubbing with a soft cloth, a polymer, an adhesive tape, a brush, or the like is used in order to remove an ink applied unnecessarily on an embossed portion of a printing mold. Problems arise in the inefficiency of the process proceeding and uniform reproducibility of the ink to be repeatedly removed to the same level when the printing mold surface is large. In addition, due to the premise of the use of unnecessary inks that are not directly used for fine pattern formation, a problem of inefficiency as well as economical efficiency has been pointed out.

In addition, when the area of the printing mold becomes large, even if the residual ink can be completely removed even by the metering process as in the prior art, since the metering process is difficult to be made at the same time with respect to the large area, It is anticipated that a problem may arise in which the physical properties are localized with time differences, and in the case of a printing mold having a large-area printing surface, another alternative technique is required.

On the other hand, after the ink is transferred (printed) from the printing mold to the substrate, if there is ink remaining in the intaglio portion of the printing mold, there is a problem that the cleaning process for the printing mold must be performed to proceed with the subsequent printing process. Doing.

As described above, in the related art, efforts have been made to solve various problems caused by the need for a metering process when forming a fine pattern using an intaglio printing method, and the present invention has been made under such a technical background.

The problem to be solved by the present invention is to solve the problem of process inefficiency and inefficiency that must proceed essentially the metering process for removing the ink applied to the embossed portion of the conventional intaglio printing mold.

The present invention, by applying a predetermined surface modifier before applying the ink to the intaglio printing mold in order to achieve the above-described problem, thereby maintaining the state that no ink remains in the embossed portion of the intaglio printing mold during ink application, The printing process may be performed without a separate metering process, and a pretreatment method and an intaglio printing method using the same are provided to prepare an intaglio printing mold capable of improving the pattern transfer efficiency from the printing mold to the substrate. There is a purpose.

The pretreatment method for the intaglio printing mold according to the present invention provided to solve the above technical problem comprises the steps of: (S1) preparing a printing mold in which the intaglio printing pattern is formed; And (S2) applying a surface modifier to the upper surface of the printing mold.

The printing mold is preferably a material selected from silicone rubber and urethane rubber.

The surface modifier is a solute consisting of a single substance or a mixture of two selected from a perfluoropolyether containing a silane functional group or a perfluoroalkane series containing a silane functional group, and purple It is preferable to use a fluorine compound-containing solution consisting of a solvent or a mixture of two or more of one selected from perfluoroalkane, perfluoroalkane containing an alkoxy group, and hydrocarbon having 5 to 7 carbon atoms. At this time, the surface modifier is more preferable if the concentration is 0.005 to 5.0% by weight.

Application of the surface modifier (S2), it is preferable to proceed using one method selected from a brush coating method, a spray coating method, a spin coating method, a bar coating method and a roll coating method.

After further performing a plasma treatment on the upper surface of the printing mold prepared in the step (S1), it is preferable to proceed to the step (S2). The intaglio printing method according to the present invention, which is provided to solve the above technical problem, is characterized in that a printing process is performed by using the intaglio printing mold pretreated according to the above.

According to the present invention, the subsequent printing process can proceed immediately without proceeding the metering process for removing the ink remaining on the upper surface of the embossed printing mold, even if the area of the printing mold is large area, the metering process is a problem of time delay, The problem of causing a change in the properties of the printing ink locally can be solved according to the printing surface, so that the printing surface of the printing mold can meet the large area. In addition, since the printing ink remaining in the printing mold is minimized after the pattern transfer to the substrate is completed, an additional cleaning process may not be performed, thereby improving process efficiency, and the pattern on the patterned substrate is close to the circle of the pattern of the printing mold. Complementary patterns are formed to have the advantage that the printing effect is improved. On the other hand, the surface energy of the printing mold is small, so that the applied ink is quickly and easily sucked into the intaglio, so that selective ink application is more easily performed, thereby improving the efficiency of the printing process.

Hereinafter, the present invention will be described in detail with reference to examples, and detailed description will be made with reference to the accompanying drawings in order to help understanding of the present invention. However, embodiments according to the present invention can be modified in many different forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. Embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art.

1 is a flowchart for explaining a pretreatment method for an intaglio printing mold according to the present invention.

Referring to FIG. 1, after the preparing of the printing mold having the intaglio printing pattern (S1), the step of applying the surface modifier to the upper surface of the printing mold (S2) is performed to pretreat the intaglio printing mold. It can be seen that it can be made. On the other hand, it is understood that the plasma treatment may be selectively performed on the upper surface of the printed mold prepared after the printing mold preparing step (S1) (S1a), and then the surface modifying agent may be applied (S2) as described above. Can be. In addition, if necessary, it can be seen that after the step (S2), the heat treatment step (S2a) of leaving the printing mold coated with the surface modifier for at least 30 minutes at a temperature of 90 ° C. or more may be performed.

The printing mold is conventionally made of silicone rubber or urethane rubber, acrylic rubber, butadiene rubber, fluorine rubber, ethylene-propylene rubber, butyl rubber, chloroprene rubber, styrene-butadiene rubber, nitrile rubber, and natural rubber. It can be selected and produced from a variety of elastic materials known to.

The surface modifier may be a perfluoropolyether containing a silane-based functional group or a perfluoropolykane-containing perfluoroalkane series containing a silane-based functional group. It is preferable to use a fluorine compound-containing solution consisting of a solvent or a mixture of two or more selected from perfluoroalkane, a perfluoroalkane containing an alkoxy group and a hydrocarbon having 5 to 7 carbon atoms. Specific examples of materials that may be used for the solute include trichloroperfluorooctylsilane (trichloro (1H, 1H, 2H, 2H) -perfluorooctyl) silane), trichloroperfluorodecylsilane (trichloro (1H, 1H, 2H, 2H) -perfluorodecylsilane, Daikin's Optool DSX, Dupont's Teflon AF, AGC's CYTPO, 3M's ECC-1000, and the like. The surface modifier is preferably a solution containing a fluorine-based compound as a coating liquid in which the solute is diluted in the solvent so as to have a concentration of 0.005 to 5.0% by weight.

Regarding the numerical range for the concentration of the fluorine-based polymer-containing solution, which is the surface modifier, when the numerical range is satisfied, the fluorine-based compound is well dissolved in a solvent, and uniform coating is possible on the surface of the printing mold. It is preferred that the pattern size and the step of the mold be formed to meet the desired purpose.

The step of applying the surface modifier (S2) may be selected from various methods known in the art such as a brush coating method, a spray coating method, a spin coating method, a bar coating method and a roll coating method.

Plasma treatment or corona discharge treatment on the upper surface of the printing mold prepared in the middle of the steps (S1) and (S2) activates the hydroxyl group (-OH) on the surface of the printing mold, and is processed in the step (S2). It is preferable to allow the surface modifier to be more stably attached to the printing mold upper surface.

As in the present invention, the surface energy of the printing mold is lowered by treating with a surface modifier which is a solution containing a fluorine-based compound before applying the printing ink to the upper surface of the printing mold, whereby the printing ink applied to the upper surface of the printing mold is embossed and engraved. There is a problem that can not be uniformly coated on. That is, the printing ink temporarily applied to the embossed portion is sucked into the engraved portion so that a small amount or a large portion of the printing ink remains on the embossed portion of the printing mold, thereby removing the ink remaining on the upper surface of the conventional embossed printing mold. There is an advantage that the subsequent printing process can proceed immediately without proceeding the metering process.

In addition, the printing mold pretreated according to the method provided by the present invention has a problem that the metering process causes a problem of time delay and a change in the properties of the printing ink locally depending on the printing surface, even if the area of the printing mold becomes large. This can be eliminated, and when the printing surface of the printing mold is large in area, there is an advantage that more desirable effects can be expressed.

Example 1

Plasma treatment was performed on a printing mold whose main component was PDMS to generate hydroxyl (-OH) on its surface, and then, as a surface modifier for the printing mold, a 3M brand name EGC1720 material, a fluorine-based polymer-containing solution, was subjected to a bar coating method. It was applied to the upper surface of the printing mold. After the pretreatment as described above, an optical photograph of the upper surface of the printing mold was taken and shown in FIG. 2. In addition, said plasma process can also be omitted as needed.

2 is an optical photograph of the top surface of one embodiment of a printing mold pretreated according to the present invention.

Then, after the ink is applied to the printing mold, the optical photograph was again taken to check how the ink is applied to the embossed and intaglio portions of the upper surface of the printing mold, and is shown in FIG. 3.

3 is an optical photograph of an upper surface of a printing mold after application of printing ink to an embodiment of a printing mold pretreated according to the present invention.

According to FIG. 3, it can be seen that all the applied ink is selectively filled only in the intaglio portion of the printing mold, and no ink remains in the embossed portion of the printing mold, so that the upper surface thereof is kept clean. On the other hand, after the ink is transferred (printed) to the upper surface of the substrate such as a PET film by using a printing mold coated with ink selectively as shown in FIG. 3, there is no ink remaining in the relief portion as well as the indentation portion of the printing mold. It was also confirmed that there is no need to go through the process of cleaning the printing mold for subsequent printing process progress.

Example 2

A printing mold having a printing area having a size of 200 × 300 mm 2 was run under the same conditions as in Example 1, and the results were confirmed that there was no balance as in Example 1. Thus, according to the present invention, it can be preferably used not only when the printing area is small but also when large area patterning is required.

Example 3

In Example 3, the surface modification prepared by diluting a solid content of 100 mg of 3M brand ECC-1000 in 10 ml ethanol, 0.3 ml water (H ₂ O), 0.15 to 0.6 ml of acetic acid, and stirred for about 30 minutes at room temperature. Topical was used. The surface modifier thus prepared was applied to the upper surface of the printing mold in the same manner as in Example 1, left at room temperature for 2 hours, and then maintained in an oven at 90 ° C for 30 minutes to prepare a printing mold. After printing ink was applied to the prepared printing mold, optical photographs were taken to check the state of printing ink distributed on the upper surface thereof (see FIG. 3).

4 is an optical photograph of a PET film to which the ink of the printing mold of FIG. 3 is transferred. Accordingly, it can be seen that the pixel pattern is shown to be inverted left and right with FIG. 3.

5 is an optical photograph of the upper surface of the printing ink after the printing ink is applied to the printing mold that has not been pretreated.

Unlike FIG. 4, it can be seen in FIG. 5 that ink remains in the embossed portion of the printing mold. As can be seen from this, when surface treatment is performed on the printing mold, ink is transferred from the printing mold to the substrate to form a pattern, and then, the printing ink does not remain on the printing mold intaglio, and is transferred to the substrate. As a result, the subsequent subsequent printing process may be performed without further cleaning the printing mold, thereby improving process efficiency.

Also, in general, when printing is completed, the step transferred by pattern transfer to the machine has a lower value than the step of the pattern formed on the printing mold. By the way, when the surface treatment for the printing mold according to the present invention is carried out because the step of the pattern transferred to the substrate is maintained relatively high step compared to the other, there is an advantage that the efficiency of the pattern transfer is improved.

As a material for confirming the technical effects in this regard, it will be described with reference to FIGS. 6 and 7.

6 is a CLSM photograph of a pattern on a substrate on which printing is completed without performing pretreatment on the printing mold.

7 is a CLSM photograph of a pattern on a substrate on which printing is completed by using a printing mold subjected to pretreatment according to the present invention.

In the case of Fig. 7, a printing mold having the same pattern width and step as that used in Fig. 6 is used except that the printing mold subjected to pretreatment according to the present invention is used. According to FIG. 6, it can be seen that the pattern step formed by transfer completion on the substrate is reduced by half. However, according to FIG. 7, it can be seen that the reduction rate of the pattern step formed by transfer completion on the substrate is very low, and according to the present invention, the pattern transfer efficiency is relatively very high.

Optimal embodiments of the present invention described above have been disclosed. Although specific terms have been used herein, they are used only for the purpose of describing the present invention in detail to those skilled in the art and are not intended to limit the scope of the present invention as defined in the claims or the claims.

The following drawings, which are attached to this specification, illustrate exemplary embodiments of the present invention, and together with the detailed description of the invention that follows, serve to further understand the technical spirit of the present invention. It should not be construed as limited to matters.

1 is a flowchart illustrating a pretreatment method for an intaglio printing mold according to the present invention.

2 is an optical photograph of a top surface of an embodiment of a printing mold pretreated according to the present invention.

3 is an optical photograph of an upper surface of a printing mold after application of printing ink to an embodiment of a printing mold pretreated according to the present invention.

4 is an optical photograph of a PET film to which the ink of the printing mold of FIG. 3 is transferred.

Fig. 5 is an optical photograph of the upper surface of the printing mold after the printing ink is applied to the unpretreated printing mold.

6 is a CLSM photograph of a pattern on a substrate on which printing is completed without performing pretreatment on the printing mold.

7 is a CLSM photograph of a pattern on a substrate on which printing is completed by using a printing mold subjected to pretreatment according to the present invention.

Claims (9)

(S1) preparing a printing mold in which a negative printing pattern is formed; And (S2) applying a surface modifier to the upper surface of the printing mold; pretreatment method for the intaglio printing mold comprising a. The method of claim 1, The printing mold is selected from silicone rubber, urethane rubber, acrylic rubber, butadiene rubber, fluorine rubber, ethylene-propylene rubber, butyl rubber, chloroprene rubber, styrene-butadiene rubber, nitrile rubber, and natural rubber. A pretreatment method for an intaglio printing mold, characterized in that it is made of one material. The method of claim 1, The surface modifier is, A solute which is a single substance or a mixture of two selected from a perfluoropolyether including a silane functional group and a perfluoroalkane family including a silane functional group; And Perfluoroalkane, perfluoroalkanes containing alkoxy groups and hydrocarbons containing from 5 to 7 carbon atoms A fluorine-based compound containing solution containing a silane-based functional group consisting of a solvent selected from a single substance or a mixture of two or more of the pre-treatment method for the intaglio printing mold. The method of claim 3, The surface modifier, the concentration of the pretreatment method for the intaglio printing mold, characterized in that 0.005 to 5.0% by weight. The method of claim 1, Application of the surface modifier is a pre-treatment method for the intaglio printing mold, characterized in that proceeding using one of the method selected from brush coating method, spray coating method, spin coating method, bar coating method and roll coating method. The method according to any one of claims 1 to 5, And further performing a plasma treatment or a corona discharge treatment on the upper surface of the printing mold prepared in the step (S1), and then performing the step (S2). The engraved printing method of claim 1, wherein the printing process is performed by using the engraved printing mold pretreated according to one of the selected claims. The engraved printing method of claim 6, wherein the printing process is performed by using the engraved printing mold pretreated according to claim 6. The engraved printing method of claim 7, wherein the printing process is performed using the engraved printing mold pretreated according to claim 7.

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