KR101610591B1

KR101610591B1 - Manufacturing method of a gravure roller for micro pattern printing and the roller

Info

Publication number: KR101610591B1
Application number: KR1020150074719A
Authority: KR
Inventors: 김성원; 강숙희; 김민철; 양동석
Original assignee: 김성원; 강숙희
Priority date: 2015-05-28
Filing date: 2015-05-28
Publication date: 2016-04-07

Abstract

The present invention relates to a manufacturing method of a gravure flexible packaging roller for printing a micro pattern and a roller thereof. The manufacturing method of a gravure flexible packaging roller comprises: a first step of forming a printing pattern as a fine line with a fine line width and forming a dot for a sink wall in a fine line area; and a second step of forming a fine line groove, filled with nano ink, on the outer circumference of the roller and forming the sink wall in the fine line groove in order for the sink wall to protrude from the dot. According to the present invention, the manufacturing method of a gravure flexible packaging roller forms the fine line groove having the sink wall protruding from the surface of the gravure flexible packaging roller to be able to print a micro pattern to perform a function of preventing falsification in flexible packaging, thereby being effective to protect a characteristic design of the printing pattern.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a gravure soft packaging roller for fine pattern printing,

The present invention relates to a package for food packaging such as snacks and ramen noodles, a package of soft linen, such as detergents, mask packs and various types of pouches, which are closely related to daily life, The present invention relates to a method of manufacturing a gravure soft packaging roller that can be printed and a roller therefor.

Generally, soft packaging printing industry refers to a part of packaging, which is a unit packaging or an industry belonging to inner packaging. Flexible packaging refers to a package in which flexible material is used and its shape is variable.

In particular, soft packaging refers to a package made by joining or coating a group or composite with gravure printing or flexographic printing mainly on thin branches or composite branches, plastic films, or joints of composite films or metal foils.

At this time, gravure printing is generally used for various electronic parts in addition to multilayer ceramic electronic parts, and a gravure printing machine as shown in Fig. 1 is used. This is constituted by a gravure roll 10 and a pressing roll 20 for pressing the sheet 1 to be printed on the gravure roll 10 so that the gravure roll 10 and the pressing roll 20 are rotated, The ink 32 of the ink tray 30 provided at the lower portion of the gravure roll 10 is placed in the pattern 12 formed on the circumferential surface of the gravure roll 10 in a state that the ink 12 is contained in the pattern 12 Ink is printed on the sheet 1 while rotating. At this time, the gravure roll 10 is rotated and dipped in the ink 32 contained in the ink tray 30, so that the ink 32 is applied to the plurality of patterns 12 formed on the circumferential surface of the gravure roll 10, The extra ink 32 on the circumferential surface of the roll 10 is removed by a doctor blade 40.

In this gravure printing method, the printing quality is influenced by the precision of the pattern 12 of the gravure roll 10, and the pattern 12 of the gravure roll 10 is used as the pattern of the gravure roll 10, And the surface of the gravure roll 10 is exposed to light using a laser exposing machine and then subjected to an etching process to form a pattern in a semi-processed state. In order to prevent corrosion, chromium Plating is performed to form a plurality of patterns 12 on the outer circumferential surface of the gravure roll 10.

Prior art relating to such a gravure printing method has been proposed in, for example, Patent Registration No. 10-0976359, Publication No. 10-2010-0061956, and the like.

First, Registration No. 10-0976359 is for a printing method in the IT printing electronic field. The IT printing electronic part is a touch screen panel, a radio frequency identification (RFID) antenna tag, an NFC (Near Field Communication) It is used for the printing work of conductive circuit such as solar cell and it is applied directly to soft packaging printing which is closely related to everyday life such as food wrapping paper such as snack and ramen etc. and detergent, it's difficult.

Also, the copper plate manufacturing method proposed in the patent application No. 10-2010-0061956 is a method of manufacturing a copper foil or a pearl to attach a color print layer and a metal texture to a film adhered to an outer surface of a home appliance, Wherein the cell size s of the copper plate is 200 to 400 탆 and the cell depth d of the copper plate is 50 to 100 탆. 2. The method of manufacturing a copper plate according to claim 1, And the thickness t of the cell line of the copper plate is in the range of 10 to 50 mu m. When the print layer is formed as a whole, it is not suitable for producing a printing roller having a fine pattern.

In the meantime, the conventional anti-counterfeiting technology is the most applied technology for money making. Six to 20 technologies are generally integrated into one kind of money such as a band hologram, a silver line insertion, a color conversion ink, a hidden image, Canadian currency has begun to apply plastic currencies instead of paper, and it is managed as a serial number for commonly seen luxury bags, but it also has limitations that can not be a complete solution for counterfeiting prevention.

In addition, micro (10 ^-6 m) identifiers have been developed for attaching hologram stickers or mixed with the contents of products to prevent counterfeiting of products. However, it is not possible to increase product cost, mass production, It was impossible to apply it realistically due to the limitation of rapid spread of the market.

Accordingly, the present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a package for food packaging such as snacks, ramen noodles and the like, which is mainly applied to products having a close relationship with daily life, such as detergents, mask packs, And a method of manufacturing a gravure soft packaging roller capable of realizing fine line widths of not more than 100 탆 which can not be falsified, and a roller therefor.

In particular, the present invention provides a method of manufacturing a gravure soft packaging roller and a roller thereof, which can print a fine pattern for preventing forgery on a transparent plastic film such as PET or OPP using a nano ink, It has its purpose.

In order to solve such a technical problem,

A first step of forming a print pattern as a fine line having a fine line width and forming a dot for a sink wall in the fine line area; And a second step of forming a sink wall in a columnar shape on the outer peripheral surface of the roller by the dot portion in the fine line groove, wherein the fine line groove is filled with the nano ink by the fine line The present invention also provides a method of manufacturing a gravure soft packaging roller for fine pattern printing.

In this case, the second step may include: a second step of applying a photoresist for exposure to light by providing a copper plate on an outer circumferential surface of the roller; (2-2) a step of exposing and developing the resist pattern using a laser exposure machine to form an opening in a portion of a fine line except a dot portion of the printed pattern; And etching the surface of the copper plate exposed through the opening to form a fine line groove and a sink wall.

In particular, the fine line has a line width of 50 to 70 mu m, the dot has a width of 15 to 30 mu m, and is randomly formed in the fine line area; And an etching depth of the copper plate exposed through the opening is 11 +/- 1 mu m.

And (2-4) a step of removing the photoresist and performing chromium plating by washing the roller after the step 2-3.

At this time, the chromium plating is formed as a whole on the surface of the copper plate with a thickness of 6 mu m.

The first step may further include the step of forming a choke outline on the fine line.

The present invention also provides

Characterized in that a fine line groove in which nano ink is filled on the outer peripheral surface of the roller and a plurality of sink walls projected by the dot portion are formed in the fine line groove. Gravure soft rollers are also available.

According to the present invention, fine line grooves having a sink wall protruding from the surface of a gravure soft packaging roller can be formed, thereby enabling printing of fine patterns, thereby realizing the function of preventing forgery during soft packaging printing. effective.

In addition, according to the present invention, it is possible to form a soft printed line as a fine line, thereby minimizing an additional process for preventing forgery, thereby securing competitiveness in soft packaging printing, and also realizing a fine line, Dimensional hologram effect can be realized.

1 is a conceptual diagram illustrating a general gravure printing process.
2 is a view showing a process of manufacturing a gravure soft packaging roller for fine pattern printing according to the present invention.
FIG. 3 is a view sequentially showing a surface processing process of a gravure soft packaging roller for fine pattern printing according to the present invention.
4 is a view for explaining a pattern design for fine pattern printing according to an embodiment of the present invention and before and after formation of a sink wall of a roller surface.
5 is a view for explaining a pattern design for fine pattern printing according to another embodiment of the present invention and before and after formation of a sink wall of a roller surface.
6 is a view showing examples of printing a pattern on a PET film using a gravure soft packaging roller for fine pattern printing manufactured according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method of manufacturing a gravure soft packaging roller for fine pattern printing according to the present invention and its rollers will be described in detail with reference to the accompanying drawings.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

2 to 5, the gravure soft packaging roller for fine pattern printing according to the present invention is designed to have a print pattern composed of fine lines and dots for forming fine line grooves and sink walls on the outer peripheral surface of a roller, (S2) of forming a print pattern on the surface of the rollers, and are manufactured through various processes such as food packaging such as snacks and ramen noodles, detergents, mask packs and various types of pouches, And can be used as a printing roller for producing a soft wrapping paper which can perform forgery prevention by applying the same.

&Lt; Print pattern design process having fine lines and dots (S1) >

First, an image file is created by designing or creating a print pattern matching a product characteristic, or by converting various existing images according to the characteristics of the product (S1-1)

Then, the image file relating to the print pattern 1 is loaded, and the print pattern 1 is reconstructed into a fine line 10 having a fine line width (S1-2)

In this case, when the printed pattern 1 is formed into a fine line 10, it is formed into a fine line 10 having a line width of 50 to 70 μm using a high-performance computer such as a Macintosh. For example, the line width of the fine line 10 may be 50 mu m.

The distance between the fine lines 10 and the adjacent fine lines 10 'may be variously formed, but it is preferable to maintain an interval of at least 30 μm or more.

When the printed pattern 1 is formed by the fine lines 10 as described above, illegal falsification of the pattern of the printing paper can be prevented in the future.

Meanwhile, the print pattern 1 can be used to directly create an image using a high-performance computer in the form of a fine line 10, but a printed pattern (for example, 1) can be modified by changing the format to an image file.

It is preferable that the image file produced in this manner is produced as a bitmap image so as to be compatible with each other in an IBM PC or a Macintosh computer. The image file can be loaded into the micro lines 10 in various directions, (10) cross each other. In this case, two or more fine lines 10 and 10 'may overlap.

In order to load the image file, a graphic program, such as Photoshop or an Illustrated program, is used.

At this time, when using the Photoshop and Illustrator program, a bitmap image is used and the work can be performed with the resolution set to 6400 or 12800 dpi.

The fine line 10 is etched on the surface of the roller 2 to form a fine line groove 22 filled with nano ink as a non-etched portion in the region of the fine line 10 A dot 12 for forming a sink wall 24 is formed.

It is preferable that the dot 12 formed in the area of the fine line 10 has a width of 15 to 30 탆 and may be formed to have a width of 30 탆 or more if necessary.

At this time, the dots 12 may be formed at a constant interval (for example, 30 μm) in the region of the fine lines 10, but they may be randomly formed, Preferably, the shape is circular or elliptical.

On the other hand, when the image file relating to the print pattern 1 is loaded through the step S1-2 and the print pattern 1 is reconstructed into the fine line 10 having the fine line width, Generating a choke outline 11 having a width of 0.01 mm (10 μm) can eliminate the interference during the corrosion operation and maintain the straight line of the fine line 10 and the detailed angle. Therefore, when the image file relating to the printed pattern 1 is loaded and the printed pattern 1 is reconstructed into the fine line 10 having a fine line width, the choke outline 11 having a width of 0.01 mm (10 μm) (S1-3)

&Lt; Step of forming a print pattern on the roller surface (S2) >

The print pattern 1 of the image file produced through the above step S1 is formed as the print pattern 2a on the outer peripheral surface of the roller 2. [ At this time, a structure in which copper plates are integrally attached to the outer peripheral surface of the roller 2 forms fine line grooves 20 filled with nano ink by the fine lines 10 of the printed pattern 1, In the groove 20, a sink wall 22 is formed to protrude in the form of a column, for example, by a dot 12. The process for this is explained in detail.

First, a photoresist 20a for photosensitive exposure is coated on the outer peripheral surface of the roller 2. (S2-1)

After the step S2-1 is performed, the fine lines 12 except the dot 12 are printed in the print pattern 1 of the image file through the process of exposure and development using a high-resolution laser exposure machine. And the opening 20b is formed on the surface of the copper plate of the portion (S2-2)

In this case, the laser exposure apparatus is provided with a control board equipped with an image processor called a Rip (Raster Image Process) to convert point or vector files into images and output the images. Thus, the laser exposure apparatus induces the surface exposure of the gravure roll .

After the opening 20b is formed on the surface of the copper plate 2a of the portion of the fine line 10 excluding the dot 12 in the printed pattern 1 by performing the above step S2-2, Etching is performed to form a fine line groove 22 having a sink wall 24. (S2-3)

At this time, the surface of the copper plate 2a exposed through the opening 20b is corroded to form the fine line grooves 20. In this case, the etching depth is formed to be, for example, 11. + -. 1 .mu.m. In the case of performing such an etching process, for example, even when the line width of the fine line 10 is 50 μm and the width of the opening portion 20b is 50 μm, about 10 μm is also collapsed on the side surface in the course of etching, The width of the line groove 22 is, for example, 79 占 퐉. Nevertheless, the fine line grooves 22 can form sufficient fine line grooves.

On the other hand, although the photoresist is formed on the surface of the dot portion 12, the sink wall 24 is broken by about 30% to 40% due to collapse in the etching process, The height of the sink wall 24 from the bottom of the upper wall 22 is about 60 to 80% and is about 6 to 8 탆 in height.

Thereafter, the photoresist is removed by washing. In this printing pattern 20, a sink wall is patterned one by one to minimize the surface tension of the ink during gravure printing and to maximize the centrifugal force against the rotation of the roller 2, Printing is possible.

After the step S2-3 is performed, it is inspected whether the print pattern 20 is normally formed on the surface of the copper plate 2a through the close inspection (S2-4)

After the step S2-4 is performed, the chromium plating layer 2c is formed by performing chromium plating for the purpose of preventing corrosion of the surface of the copper plate 2a, thereby forming a printed pattern (not shown) formed on the outer circumferential surface of the gravure roll 10 20 are protected. (S2-5)

In this case, it is preferable that the chromium plating layer is formed as a whole on the surface of the copper plate with a thickness of, for example, 6 mu m.

A fine line groove (for example, 75 탆) 22 is formed by forming a print pattern with a fine line (for example, 50 탆) 10 of ultrafine line width and etching the same, Fine pattern printing can be performed.

In particular, as shown in FIG. 4 and FIG. 5 (a), if the sink wall is not applied, gravure printing is not performed on the knife (Doctor Knife), so that the printing operation can not be performed, And a sink wall 24 is formed in the fine line grooves 22 for smoothly progressing pattern printing having a fine line structure as shown in FIGS. 4 and 5 (b) Printing of the fine pattern 20 having a width of 100 mu m or less can be realized.

For smooth operation, nano ink of fine particles, centrifugal force above a certain level, and ink viscosity control are the points of commercialization.

4 and 5 (b), when the sink wall 24 is randomly designed in the fine line width and the corrosion operation is performed, the optimum depth is 10 to 12 탆, and the height 65 to 70%), so that gravure printing can be performed.

When gravure soft packaging printing is performed on PET or OPP type transparent plastic film using nano ink using the roller 2 manufactured by the above-described method, gravure printing as shown in Fig. 5 can be performed.

Although the embodiments of the present invention have been described in detail in the foregoing, the scope of the present invention is not limited thereto, and the scope of the present invention extends to substantially the same range as the embodiments of the present invention.

1: Print pattern 2: Roller
10: fine line 11: choke outline
12: dot 20: fine pattern
22: fine line groove 24: sink wall

Claims

A first step of forming a print pattern as a fine line having a fine line width and forming a dot for a sink wall in the fine line area; And a second step of forming a fine line groove on the outer circumferential surface of the roller by which the nano ink is filled by the fine line and a sink wall protruding by the dot in the fine line groove, However,
The second step includes a second step of applying a photoresist for photosensitive exposure by providing a copper plate on an outer peripheral surface of the roller, (2-2) a step of exposing and developing the resist pattern using a laser exposure machine to form an opening in a portion of a fine line except a dot portion of the printed pattern; And etching the surface of the copper plate exposed through the opening to form a fine line groove and a sink wall,
The fine line has a line width of 50 to 70 mu m, the dot has a width of 15 to 30 mu m and is randomly formed in the fine line area; And etching depth of the copper plate exposed through the opening is 11 +/- 1 mu m. &Lt; RTI ID = 0.0 > 8. < / RTI >

The method according to claim 1,
And (2-4) removing the photoresist and performing chromium plating by washing the roller after the step 2-3.

3. The method of claim 2,
Wherein the chromium plating is formed on the entire surface of the copper plate to a thickness of 6 占 퐉.

The method according to claim 1,
Wherein the first step further comprises the step of forming a choke outline in the fine line. &Lt; RTI ID = 0.0 > 15. < / RTI >

A gravure soft packaging roller for fine pattern printing produced by any one of claims 1 to 4.

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