KR102699435B1 - Roll-to-roll/inkjet printing system for forming bezel patterns - Google Patents

Abstract

The present invention comprises an unwinding roll and a rewinding roll for supplying and recovering a substrate film, a guide roll for driving the substrate film supplied from the unwinding roll, and a tension roll for applying tension to the substrate film, a work place arranged between the guide roll and the tension roll for temporarily stopping the substrate film being transported; a surface treatment unit arranged between the unwinding roll and the guide roll for treating the surface of the substrate film; a printing unit arranged above the work table for performing inkjet printing on the stopped substrate film; an accumulation part provided on each side of the guide roll and the tension roll for dispersing stress generated when the substrate film is re-transported after printing in a stopped state before and after the work table; The present invention provides a roll-to-roll/inkjet printing system for forming a bezel pattern, which includes a lamination part provided between an accumulation part provided on one side of the tension roll and the rewinding roll to coat a protective film on the printed surface after printing the base film.
The system according to the present invention can form a bezel pattern through precision printing capable of implementing high resolution while allowing continuous multilayer printing on a large-area substrate film.

Description

ROLL-TO-ROLL/INKJET PRINTING SYSTEM FOR FORMING BEZEL PATTERNS

The present invention relates to a roll-to-roll/inkjet printing system for forming a bezel pattern, and more specifically, to a roll-to-roll/inkjet printing system capable of forming a bezel pattern precisely while enabling continuous multilayer printing.

On the cover window of a display such as a smartphone or tablet PC, there is a bezel, which is a non-display area, and a pattern layer of various colors such as black and white is formed on this bezel to provide an aesthetic feel.

The bezel pattern of the display can be formed in various ways, such as photolithography, screen printing, inkjet printing, gravure coating, and reverse offset coating. Among these, the inkjet printing process has the advantage of being able to form a desired pattern in a short period of time in a non-contact manner using ultraviolet curing or heat curing, and of being able to achieve the optical density of the product by controlling the dot spacing of the inkjet drop.

Most bezel patterns are printed on tempered glass, but it is difficult to apply the high-temperature heat curing method used for existing tempered glass to print bezel patterns on substrates such as films to replace tempered glass. Therefore, a technology that forms bezel patterns using an inkjet printing process using ultraviolet curing is being used recently.

Meanwhile, there has been an attempt to apply a roll-to-roll (R2R) method to the inkjet printing process to enable continuous printing for mass production in the inkjet printing process. The roll-to-roll method can improve productivity by continuously performing printing while the substrate is transported between unwinding the substrate on one side and rewinding the substrate on the other side.

Figure 1 schematically illustrates a pattern formation process by inkjet printing using a conventional roll-to-roll process. A pattern is printed on a substrate film moving between rolls by an inkjet head, and then ultraviolet curing is performed. In this case, in order to perform pattern printing on the moving substrate film, the tension of the film, i.e., tension, must be maintained by a tension roll. However, the film may expand due to the force applied by the tension roll, and it is not easy to control film shaking only by adjusting the tension, so that precise printing is practically difficult. In particular, when the film has a large area and is thick, it is not easy to perform the roll-to-roll process due to the weight of the film itself.

In addition, when repeat printing is required, existing roll-to-roll/inkjet devices go through a process of unrolling the roll after one-color printing and printing again, and since printing is done on a substrate moved by a roll, it is almost impossible to precisely perform two-color printing at the same location due to minute movements of the substrate, vibrations of the inkjet head, etc.

Therefore, in the display industry, which requires precision printing (resolution of less than 100㎛), there is a need for the development of a device or system that can perform continuous multilayer printing more precisely.

The present invention is intended to solve the above problems, and one object of the present invention is to provide a system capable of forming a bezel pattern through precision printing capable of implementing high resolution while performing continuous multilayer printing on a large-area base film by improving the inkjet printing technology using the existing roll-to-roll process.

According to one aspect of the present invention, there is provided an unwinding roll and a rewinding roll for supplying and recovering a substrate film, a guide roll for driving a substrate film supplied from the unwinding roll, and a tension roll for applying tension to the substrate film.

A roll-to-roll/inkjet printing system for forming a bezel pattern is provided, comprising: a work place arranged between the guide roll and the tension roll to temporarily stop the substrate film being transported; a surface treatment unit arranged between the unwinding roll and the guide roll to treat the surface of the substrate film; a printing unit arranged above the work table to perform inkjet printing on the stopped substrate film; an accumulation unit provided on each of one side of the guide roll and the tension roll to disperse stress generated when the substrate film is re-transported after printing in a stopped state before and after the work table; and a lamination unit provided between the accumulation unit provided on one side of the tension roll and the rewinding roll to coat the printed surface of the substrate film with a protective film after printing.

The width of the above-described film can be 750 to 1250 mm.

The above work table may include a plurality of vacuum holes for maintaining the substrate film in a stationary state by vacuum suction.

The stationary state of the substrate film on the above work table can be maintained for 5 to 10 seconds, specifically 6 to 8 seconds.

The above surface treatment unit may include a discharge electrode for corona treatment.

The above printing unit may include an inkjet head and a curing device.

The above-described accumulator may include a plurality of accumulators in a roll shape, and may have a structure in which the plurality of accumulators are arranged at intervals (L _x ) of 80 to 150 cm and connected to each other, and the plurality of accumulators provided in the accumulator may be operated left/right and up/down according to the difference in air pressure using an air pump.

The accumulation unit provided on one side of the above guide roll may have a greater number of accumulators than the accumulation unit provided on one side of the above tension roll.

The above system may include an additional accumulation member between the laminating member and the rewinding roll.

The above system may additionally include an edge position control (EPC) for controlling left/right displacement of the substrate film between the tension roll and the accumulation unit, and an air floating kit for controlling up/down displacement of the substrate film on both sides of the work table.

The above air floating kit can supply air at a pressure of 1.0 to 5.0 kPa to the substrate film suspended on the work table.

The above system may additionally include an inspection unit for inspecting the resolution and errors of a pattern printed on the substrate film.

The roll-to-roll/inkjet printing system for forming a bezel pattern according to the present invention includes a work table between the rolls, and by repeatedly performing pattern printing and ultraviolet curing of the printed pattern several times while temporarily stopping a substrate film transported by the roll-to-roll on the work table, multilayer printing of two or more colors can be continuously and precisely performed, thereby forming a bezel pattern having a high resolution.

In addition, the roll-to-roll/inkjet printing system of the present invention operates by arranging an accumulation part at the front and rear positions of the work table where printing takes place, thereby dispersing the stress remaining in the substrate film and effectively controlling shaking of the substrate film thereby improving the accuracy of multilayer continuous printing.

The following drawings attached to this specification illustrate preferred embodiments of the present invention and, together with the contents of the invention described above, serve to further understand the technical idea of the present invention; therefore, the present invention should not be interpreted as being limited to matters described in such drawings.
Figure 1 schematically illustrates the process of forming a bezel pattern using inkjet printing using a conventional roll-to-roll process.
FIG. 2 schematically illustrates a roll-to-roll/inkjet printing system for forming a bezel pattern according to one embodiment of the present invention.
FIG. 3 is an exemplary diagram showing a process of forming a bezel pattern through up-and-down movement of a printing section in a stationary state of a substrate film using a roll-to-roll/inkjet printing system according to one embodiment of the present invention.
FIG. 4 is an exemplary diagram showing the structure of an accumulation unit applied to a roll-to-roll/inkjet printing system according to one embodiment of the present invention.
FIG. 5 is an example of a roll-to-roll/inkjet printing system according to one embodiment of the present invention, in which an edge position control (EPC) device and an air floating kit are additionally provided.
FIG. 6 is a photograph showing a bezel pattern formed according to Example 1 of the present invention.
FIG. 7 is a graph showing the degree of shake control of a substrate film when an air floating kit is additionally provided to a roll-to-roll/inkjet printing system according to Example 2 of the present invention.

The terms or words used in this specification and claims should not be interpreted as limited to their usual or dictionary meanings, but should be interpreted as having meanings and concepts that conform to the technical idea of the present invention, based on the principle that the inventor can appropriately define the concept of the term in order to explain his or her own invention in the best manner.

One embodiment of the present invention relates to a roll-to-roll/inkjet printing system for forming a bezel pattern, and the system will be specifically described below with reference to the drawings.

FIG. 2 schematically illustrates a roll-to-roll/inkjet printing system for forming a bezel pattern according to one embodiment of the present invention. Referring to FIG. 2, a system (100) for forming a bezel pattern according to one embodiment of the present invention includes an unwinding roll (11) and a rewinding roll (12) for a roll-to-roll process, and a guide roll (13) and a tension roll (14), and a work place (10), a surface treatment part (20), a printing part (30), an accumulation part (40), and a lamination part (50) may be additionally provided between these parts.

The above unwinding roll (11) and rewinding roll (12) transport the base film roll-to-roll while unwinding it on one side and rewinding it on the other side. In addition, the guide roll (13) drives the base film supplied from the unwinding roll (11), and the tension roll (14) provides tension to the base film driven by the guide roll (13).

The substrate film applicable to the present invention may be used without limitation as long as it is a material that allows inkjet printing, and for example, films such as polyethylene terephthalate (PET), polycarbonate (PC), polymethyl methacrylate (PMMA), polyethylene naphthalate (PEN), polyether sulfone (PES), cyclic olefin polymer (COC), triacetyl cellulose (TAC), polyvinyl alcohol (PVA), polyimide (PI), polystyrene (PS), and biaxially oriented polystyrene (biaxially oriented PS) may be used. In addition, the size of the substrate film may vary depending on the size and number of bezel patterns to be printed, and in particular, a substrate film having a large area with a width dimension of 750 to 1,250 mm, for example, 700 to 900 mm, can also be suitably used in the present invention.

The surface treatment unit (20) is arranged between the unwinding roll (11) and the guide roll (13) to treat the surface of the substrate film, and the surface treatment unit (20) may include a discharge electrode for corona treatment.

Corona treatment ionizes the air between a discharge electrode and a substrate film being transported in a roll-to-roll manner by high frequency generated from a corona treatment device, thereby generating charged particles, and these particles can cause oxidation on the film surface by colliding with the surface of the substrate film. The surface energy of the substrate film increases due to the polar functional groups (C=O, C-O-H, COOH, COOR, COR, etc.) generated by such surface oxidation, which can improve printability by enhancing affinity with printing ink. In addition, such corona treatment can improve adhesion with other substrate films in the subsequent lamination process of the printed surface.

The surface treatment unit (20) described above can be used without limitation as a corona discharge treatment device commonly used in the relevant field, and for example, a corona discharge treatment device using a vacuum tube method, a transistor method, a thyristor inverter method, etc. can be used.

The above work table (10) is arranged between a guide roll (13) that drives a substrate film and a tension roll (14) that provides tension to the substrate film, and is provided with a number of vacuum holes so that the substrate film being transported is temporarily stopped by vacuum suction through the holes to form a sheet. That is, the work table can provide a stationary image to a large-area substrate film transported in a roll-to-roll manner, thereby increasing precision during an inkjet printing process.

The size of the work table may vary depending on the width of the substrate film. For example, if the width of the substrate film is 750 mm, it is advantageous to design the size of the work table to be 750 mm x 750 mm or more, that is, larger than the width of the substrate, so that the substrate film can be firmly fixed.

The above printing unit (30) is arranged on the upper part of the work table (10) to perform inkjet printing on a stationary substrate film, and the printing unit (30) may be configured to include an inkjet head and a curing device.

FIG. 3 is a diagram exemplarily showing a process of forming a bezel pattern through up-and-down movement of a printing unit in a stationary state of a substrate film using a roll-to-roll/inkjet printing system according to one embodiment of the present invention. Specifically, when the printing unit moves in a printing direction toward a substrate film that is stationary on a worktable and maintains a sheet shape, a bezel pattern is printed through an inkjet head, and the printed pattern can be immediately cured through a curing device. When the printing unit moves up and down once, one-color printing is performed, and the stationary state of the substrate film during one-color printing can be maintained for 5 to 10 seconds, for example, 6 to 8 seconds.

If printing and curing are performed while the substrate is moved by a roll as shown in Fig. 1, precise printing may be difficult due to minute movements of the substrate film, vibrations of the inkjet head, etc.

After performing 1-color printing while the substrate film is stopped, the process of moving the printing module up and down again is repeated to perform 2-color or more multilayer printing. At this time, the stopping time of the substrate film becomes longer when performing 2-color or more multilayer printing. For example, if the stopping state of the substrate film is maintained for 8 seconds in the case of 1-color printing, the stopping state can be maintained for 16 seconds in the case of 2-color printing.

Meanwhile, in order to increase the resolution of the bezel pattern to be formed during multi-layer printing of two or more degrees, the printing position on the substrate film can be confirmed using an align camera.

If necessary, a step of inspecting the resolution and errors of the pattern may be performed before forming a multilayer printed pattern through repetitive inkjet printing on the stationary substrate film and then transporting it to a tension roll.

In one embodiment of the present invention, the inkjet head provided in the printing unit includes one or more spray nozzles that spray ink in the form of droplets, thereby enabling multiple patterns to be printed at once.

The ink may be a black ink, a color ink, or a white ink commonly used in forming a bezel pattern, and may be, for example, a cationic polymerization type ultraviolet-curable ink composition containing a pigment, a dispersant, an epoxy resin, a vinyl ether compound, an oxetane resin, a photopolymerization initiator, an adhesion promoter, a photosensitizer, and a surfactant, or a radical polymerization type ultraviolet-curable ink composition containing a pigment, a dispersant, an acrylate oligomer, an acrylate monomer, a photopolymerization initiator, an adhesion promoter, a surfactant, and the like.

In addition, the curing dose of the ink may be 20 to 20,000 mJ/cm ² , preferably 50 to 3000 mJ/cm ² , and may be cured by absorbing ultraviolet light in a wavelength range of 250 to 410 nm, and the viscosity may be 1 to 50 cp at 25° C., but is not limited thereto.

In one embodiment of the present invention, the ultraviolet curing device provided in the printing section can be used without any special limitation as long as it emits ultraviolet rays with a wavelength of 250 to 410 nm, and a UV lamp, a mercury vapor arc, a carbon arc, a Xe arc, and an LED curing device can be used.

The above accumulation part (40) is provided on one side of each of the guide roll (13) and the tension roll (14), specifically, at the front and rear of the work table (10) (i.e., at positions corresponding to the front and rear of the printing section), thereby enabling the overall tension of the base film to be controlled in the process according to the present invention.

FIG. 4 is a diagram exemplarily showing the structure of an accumulator (40) applied to a roll-to-roll/inkjet printing system according to one embodiment of the present invention. Referring to FIG. 4, the accumulator (40) has a structure in which a plurality of roll-shaped accumulators are arranged at intervals (L _x ) of 80 to 150 cm and connected to each other, and the plurality of accumulators connected to each other can be operated using a pneumatic pump. At this time, the entire roll-to-roll process is performed, and the substrate film is transported, and the plurality of roll-shaped accumulators move left/right and up/down according to the difference in pneumatic pressure, thereby evenly distributing the residual stress generated in the substrate film due to the ink head of the printing unit (30) stopping, thereby controlling the tension of the substrate film.

If multiple accumulators are not pneumatic pumps, but rather are operated using electric motors, the process speed may increase beyond a certain speed, which may increase the stress on the ground motor, causing a large load and causing the screw of the motor to separate or a backlash gap to occur, making precise response difficult. In addition, if sparkling caused by static electricity generated by the substrate film during the process is transferred to the electric motor, the motor may overheat. Due to these phenomena, problems may occur in the screw or bearing of the motor, making continuous maintenance of the roll-to-roll process and accurate energy maintenance difficult.

Considering the problems described above, the present invention operates using a pneumatic pump.

In one embodiment of the present invention, the accumulators (40) provided on one side of the guide roll (13) and the tension roll (14) may each include 10 to 20 accumulators. At this time, the number of accumulators provided on one side of the guide roll (13) may be greater than the number of accumulators provided on one side of the tension roll (14). For example, the number of accumulators in the accumulator on the guide roll (13) side may be 1.5 to 2 times greater. This is because, in the case of the tension roll (14) side, tension control is also possible by the lamination part (50) of the latter half of the roll-to-roll and the rewinding roll (12).

If necessary, an accumulation section (40') may be additionally provided between the lamination section (50) of the latter half of the roll-to-roll and the rewinding roll (12).

In this way, the present invention operates by arranging the above-described accumulation portions at the front and rear positions of the work table where printing takes place, thereby dispersing the stress remaining in the substrate film and effectively controlling the shaking of the substrate film thereby improving the accuracy of multilayer continuous printing.

The lamination part (50) is provided between the accumulation part provided on one side of the tension roll (14) and the rewinding roll (12), and may be configured with a structure capable of attaching a protective film on the printing surface during the process of retransporting the patterned substrate film from a sheet form to a roll form. If necessary, an adhesive may be additionally used to attach the protective film.

The above protective film may be made of a material such as polyethylene terephthalate (PET), polycarbonate (PC), or polymethyl methacrylate (PMMA) that can protect the printed surface of the base film.

In addition, the system (100) for forming a bezel pattern of the present invention may additionally be equipped with an edge position control (EPC) for controlling left/right displacement of the substrate film between the tension roll and the accumulation unit, and an air floating kit for controlling up/down displacement of the substrate film on both sides of the work table.

FIG. 5 is an example of a roll-to-roll/inkjet printing system according to one embodiment of the present invention, in which an edge position control (EPC) device and an air floating kit are additionally provided.

When referring to Fig. 5, when performing inkjet printing while mounting the EPC between the tension roll and the accumulation section and operating the air floating kit on both sides of the work table, the left/right and up/down shaking phenomenon that may occur when the base film maintains a stationary sheet state on the work table can be minimized.

In particular, the air floating kit can further enhance precision printing efficiency in a stationary state by controlling the up/down displacement of the film by supplying air to the stationary substrate film. The air floating kit can be arranged vertically with respect to the substrate film in a roll-to-roll, and is made of stainless steel and has a long bar shape, and discharges dry air from the middle portion to more effectively control the tension of the substrate film. Accordingly, a shaking phenomenon that may occur when the substrate film maintains a sheet state can be prevented, thereby minimizing the up/down displacement of the film.

The size of the air floating kit can be variably adjusted depending on the width of the substrate, and can be, for example, approximately 40 cm (L) x 10 cm (W). In addition, multiple air floating kits can be connected and used depending on the size of the worktable. For example, when the size of the worktable is 750 mm x 750 mm, two air floating kits can be used by vertically connecting them to each other through a connecting ring provided at each end (see Fig. 5). The number of sets of air floating kits connected in this way can be variably increased depending on the distance between the guide roll and the tension roll.

The strength of the air supplied through the above air floating kit may vary depending on the thickness and type of the base film, but considering that the thickness of the optical film typically used in the display field is 100 ㎛ or less, it is advantageous to control it within a range of 1.0 to 5.0 kPa, for example, 2.0 to 5.0 kPa or 3.0 to 5.0 kPa.

In addition, the system (100) for forming a bezel pattern of the present invention may additionally include an inspection unit for inspecting the resolution and errors of a pattern printed on the substrate film.

As described above, the roll-to-roll/inkjet printing system of the present invention firmly holds a base film running in a roll-to-roll manner on a worktable to maintain a stationary state in the form of a sheet, and an accumulation part arranged in front and behind the worktable and the printing part disperses the stress remaining in the base film, thereby effectively controlling shaking of the base film, thereby further improving the accuracy of multilayer continuous printing, and additionally, by repeatedly operating the printing module in a state where shaking of the film is controlled through the EPC and the air floating kit, multilayer printing of two degrees or more can be performed.

This makes it possible to improve the existing process in which it was difficult to perform two-color printing at the same location due to minute movements of the substrate film and vibrations of the inkjet head in the roll-to-roll process, and to meet the needs of the display industry that require precision printing (resolution of less than 100 ㎛).

Therefore, the bezel pattern formed using the roll-to-roll/inkjet printing system according to the present invention can exhibit a line width of less than 100 ㎛, for example, 10 to 90 ㎛, or 10 to 50 ㎛, thereby implementing high resolution.

Hereinafter, in order to help understand the present invention, examples will be given and described in detail. However, the examples according to the present invention may be modified in various different forms, and the scope of the present invention should not be construed as being limited to the following examples. The examples of the present invention are provided to more completely explain the present invention to a person having average knowledge in the art.

Example 1: Formation of a bezel pattern through two-layer printing

As shown in Fig. 2, a roll-to-roll/inkjet printing system including an unwinding roll, a rewinding roll, a guide roll, and a tension roll, and a surface treatment part including a corona discharge electrode, a work table (900 mm x 900 mm) having a plurality of vacuum holes between the guide roll and the tension roll, a printing part on the upper portion of the work table, an accumulation part on each of one side of the guide roll and the tension roll, and a lamination part between the accumulation part on one side of the tension roll and the rewinding roll was used to form a bezel pattern.

The above printing section was configured to have an inkjet head including four rows of spray nozzles and a UV LED (365/395 nm). At this time, a black ink composition including 42 parts by weight of oxetane as evaluation ink, 15 parts by weight of alicyclic epoxy, 20 parts by weight of carbon black, 5 parts by weight of an acrylic dispersant, 10 parts by weight of diethylsuccinate as a solvent, 5 parts by weight of a photopolymerization initiator, and 3 parts by weight of a surfactant was used for the spray nozzle.

First, a polyethylene terephthalate (PET) film (width: 750 mm) was prepared as a substrate film and transported while being unwound on one side of the system and rewound on the other side.

The above substrate film was first subjected to corona discharge treatment, and then was kept in a sheet form by being stopped on a worktable between a guide roll and a tension roll. The printing unit was then moved up and down with respect to the substrate film to perform surface treatment, pattern printing, and ultraviolet curing of the area to be printed (1-color printing). At this time, the stationary state of the substrate film was maintained for 8 seconds. After the 1-color printing was performed, the printing module was immediately moved up and down again to perform 2-color printing. During the 2-color printing, the substrate film was kept stationary for a total of 16 seconds.

After the second printing, when the stopped base film was re-transported, the accumulator provided on one side of the guide roll was composed of 20 roll-shaped accumulators, and the accumulator provided on one side of the tension roll was composed of 10 roll-shaped accumulators, which were connected to each other at intervals of 100 cm (L _x ) and operated using a pneumatic pump. From this, the tension of the base film was controlled by evenly distributing the residual stress generated in the base film.

Next, while the tension-controlled substrate film was retransported in a roll form, a protective film made of PET material was laminated on the surface of the patterned substrate film through the lamination section.

Example 2: Formation of a bezel pattern through two-layer printing

As shown in Fig. 5, a bezel pattern was formed in the same manner as in Example 1, except that an EPC was additionally placed on one side of a tension roll in a roll-to-roll/inkjet printing system, and two air floating kits (stainless steel, 40 cm (L) × 10 cm (W)) were vertically connected on both sides of a worktable to supply air to the side opposite to the printing surface of the substrate film. At this time, the degree of control of film shake was confirmed while changing the strength of the air supplied from the air floating kit from 1.0 kPa to 5.0 kPa.

The results of the bezel pattern formed from the above are shown in Figures 6 and 7.

FIG. 6 is a shape of a bezel pattern formed from Example 1. It was confirmed that in the shape of a bezel pattern printed twice, a line width of 90 μm was shown at position ①, and a line width of 50 μm was shown at position ②, which satisfies the needs of the display industry that requires precision printing (resolution of less than 100 μm).

Fig. 7 is a graph showing the degree of control of shake of a base film when an air floating kit is operated in forming a bezel pattern according to Example 2. As can be seen from the graph figures of Fig. 7, when the air floating kit is operated, the displacement due to shake of the film is much smaller than when not operated, and it can be confirmed that the difference in displacement value between when operated and when not operated is 100㎛ or more.

From this, when performing inkjet printing in a stationary state of a substrate film, by supplying air to the stationary substrate film, the tension of the film can be more effectively controlled to minimize up/down displacement, thereby further improving the precision printing efficiency in a stationary state.

100: Bezel pattern forming system 10: Work table
11: Unwinding roll 12: Rewinding roll
13: Guide roll 14: Tension roll
20: Surface treatment section 30: Printing section
40: Accumulation part 50: Stacking part

Claims (15)

It includes an unwinding roll and a rewinding roll for supplying and recovering a substrate film, a guide roll for driving the substrate film supplied from the unwinding roll, and a tension roll for applying tension to the substrate film.
A work table (work place) arranged between the guide roll and the tension roll to temporarily stop the substrate film being transported;
A surface treatment unit arranged between the unwinding roll and the guide roll for treating the surface of the substrate film;
A printing unit for performing inkjet printing on a stationary substrate film placed on the upper part of the work table;
An accumulation part provided on each side of the guide roll and tension roll to disperse stress generated when the substrate film is retransported after printing in a stationary state before and after the work table; and
It includes a lamination part provided between the accumulation part provided on one side of the tension roll and the rewinding roll, for coating a protective film on the printed surface after printing the base film.
The width of the above-mentioned film is 750 to 1250 mm,
The stationary state of the substrate film on the above work table is maintained for 5 to 10 seconds for each 1-color printing,
The above-mentioned accumulator comprises a plurality of accumulators in a roll shape, and has a structure in which the plurality of accumulators are arranged at intervals (L _x ) of 80 to 150 cm and connected to each other.
The multiple accumulators provided in the above-mentioned accumulator are operated left/right and up/down according to the difference in air pressure using an air pump.
A roll-to-roll/inkjet printing system for forming a bezel pattern, wherein the accumulation unit provided on one side of the guide roll has a greater number of accumulation units than the accumulation unit provided on one side of the tension roll. delete In the first paragraph,
The above work table is a system including a plurality of vacuum holes for maintaining a stationary state by vacuum suction of a substrate film. delete In the first paragraph,
A system in which the stationary state of the substrate film on the above work table is maintained for 6 to 8 seconds for each 1-color printing. In the first paragraph,
The above surface treatment unit is a system including a discharge electrode for corona treatment. In the first paragraph,
The above printing unit is a system including an inkjet head and a curing device. delete delete delete In the first paragraph,
A system comprising an additional accumulation member between the above-described lamination member and the rewinding roll. In the first paragraph,
A system further comprising an edge position control (EPC) device for controlling left/right displacement of the substrate film between the tension roll and the accumulation unit. In the first paragraph,
A system further comprising an air floating kit for controlling the upper/lower displacement of the substrate film on both sides of the work table. In Article 13,
The above air floating kit is a system that supplies air at a pressure of 1.0 to 5.0 kPa to a substrate film suspended on the work table. In the first paragraph,
A system further comprising an inspection unit for inspecting the resolution and errors of a pattern printed on the above-mentioned substrate film.