Method for manufacturing printing film and manufacturing apparatus of the same

Abstract

To provide a method for manufacturing a printing film which can satisfactorily bond ink to the surface of a modified film by an inkjet method.SOLUTION: A method for printing ultraviolet curable ink on a film 1 subjected to surface modification treatment by an inkjet method, and manufacturing a printing film includes: a step of fixing the film 1 onto a stage part 2, using an apparatus A having the stage part 2, a modification treatment part 3 movable in a lateral direction, an inkjet head part 4 movable in the lateral direction, and an ultraviolet irradiation part 5; a modification step of moving the modification treatment part 3 in the lateral direction of the film 1, and subjecting a belt-like region in the lateral direction out of the surface of the film 1 to surface modification treatment; a printing step of moving the inkjet head part 4 in the lateral direction of the film 1, and printing a plurality of displays C on the modified belt-like region B1 in the lateral direction; and a curing step of irradiating the belt-like region B-1 with ultraviolet light from the ultraviolet irradiation part 5.SELECTED DRAWING: Figure 11

Description

Technical Field

[0001] The present invention relates to a method and an apparatus for manufacturing a printed film by printing a desired display on a film by an inkjet method.

Background Art

[0002] Methods for printing a desired display on a film can be broadly classified into a plate printing method such as gravure printing and a plate-less printing method such as inkjet printing. Since the plate-less printing method does not use a plate, it is excellent in that an on-demand printed film can be produced. Among the plate-less printing methods, the inkjet method is relatively inexpensive in terms of equipment and can quickly print a beautiful display. However, depending on the material of the film, since the wettability of the ink on the film surface is poor, a surface modification treatment is performed on the film. For example, in

[0051] of Patent Document 1, a head carriage 6 provided with ultraviolet irradiation devices 16, 16 before and after a head unit 10 having a print head 10a is moved, the medium before printing is irradiated with ultraviolet rays by the front ultraviolet irradiation device 16, and immediately after the ultraviolet irradiation, ink is discharged from the print head 10a onto the medium to perform printing, and then the medium is irradiated with ultraviolet rays by the rear ultraviolet irradiation device 16 to fix the ink. A description device is disclosed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

[0004] The above-described description device simultaneously moves a print head and an ultraviolet irradiation device, and performs a series of surface modification, printing, and ink curing of the medium. However, since the printing device integrally provides the printing head and the ultraviolet irradiation device on the head carriage, the ultraviolet irradiation time may be insufficient, which may prevent good modification processing. In addition, the ultraviolet irradiation time for the ink may be short, and the ink may not be cured well.

Problems to be Solved by the Invention

[0005] An object of the present invention is to provide a method for manufacturing a printed film and a manufacturing apparatus thereof that can modify the surface of a film, and can satisfactorily adhere and cure ink by an inkjet method on the surface of the modified film.

Means for Solving the Problems

[0006] A method for manufacturing a printed film according to a first aspect is a method for manufacturing a printed film by printing ultraviolet curable ink by an inkjet method on a film that has undergone a surface modification treatment. The method uses an apparatus having a stage portion, a modification treatment portion movable in the lateral direction, an inkjet head portion movable in the lateral direction, and an ultraviolet irradiation portion. The method includes a step of fixing a film on the stage portion, a modification step of moving the modification treatment portion in the lateral direction of the film to perform a surface modification treatment on a strip-shaped region along the lateral direction of the surface of the film, a printing step of moving the inkjet head portion in the lateral direction of the film to print a plurality of displays along the lateral direction in the modified strip-shaped region, and a curing step of irradiating the strip-shaped region with ultraviolet rays from the ultraviolet irradiation portion.

[0007] A method for manufacturing a printed film according to a second aspect is the manufacturing method according to the first aspect, wherein the modification step includes a step of moving the modification treatment portion in the lateral direction of the film to perform a surface modification treatment on a strip-shaped region along the lateral direction, and a step of moving the modification treatment portion in the lateral direction of the film at a position shifted in the longitudinal direction with respect to the modified strip-shaped region as a reference to perform a surface modification treatment on a strip-shaped region along the lateral direction, and repeating this process in order. After forming a plurality of the modified strip-shaped regions on the film, the printing step is performed. The manufacturing method of the printed film according to the third embodiment is such that, in the manufacturing method of any one of the first or second embodiments, the modification step includes moving the modification processing unit from the first end portion in the lateral direction of the film to the second end portion, and then moving it from the second end portion in the lateral direction of the film to the first end portion in the lateral direction, and when moving the modification processing unit to the second end portion in the lateral direction of the film, temporarily stopping the surface modification processing by the modification processing unit.

[0008] The manufacturing method of the printed film according to the fourth embodiment is such that, in the manufacturing method of any one of the first to third embodiments, the printing step includes moving the inkjet head unit in the lateral direction of the film to print a plurality of displays on one modified strip-shaped area, and moving the inkjet head unit in the lateral direction of the film at a position shifted in the longitudinal direction from the strip-shaped area on which the display is printed to print a plurality of displays on the next modified strip-shaped area, and repeating this process in order. The manufacturing method of the printed film according to the fifth embodiment is such that, in the manufacturing method of any one of the first to fourth embodiments, the curing step is performed after printing the displays on all the modified strip-shaped areas by the printing step, and the curing step includes irradiating the entire one printed strip-shaped area among the printed strip-shaped areas with ultraviolet rays, and irradiating the entire one printed strip-shaped area with ultraviolet rays at a position shifted in the longitudinal direction from the strip-shaped area irradiated with ultraviolet rays, and repeating this process in order. The manufacturing method of the printed film according to the sixth embodiment is such that, in the manufacturing method of any one of the first to fifth embodiments, the surface modification processing includes corona discharge processing.

[0009] In another aspect, a manufacturing apparatus for a printed film is provided. A manufacturing apparatus for a printed film, which performs a surface modification treatment on a film and prints an ultraviolet curable ink on the film by an inkjet method, includes a stage unit for fixing the film, the stage unit including a plurality of stage units arranged side by side in the lateral direction, a modification treatment unit movable in the lateral direction, an inkjet head unit movable in the lateral direction, and an ultraviolet irradiation unit. The plurality of stage units are configured to be movable independently of each other in the longitudinal direction, and the modification treatment unit and the inkjet head unit are configured to be movable in the lateral direction so as to cross the plurality of stage units.

Advantages of the Invention

[0010] According to the manufacturing method and apparatus of the present invention, after performing a surface modification treatment on a strip-shaped region of the surface of a film, an ultraviolet curable ink is adhered to the modified strip-shaped region by an inkjet method to print a display. By forming such a modified strip-shaped region on the film, the modified strip-shaped region is stabilized, the ink can be adhered well and cured well, and a beautiful display can be printed on the film.

Brief Description of the Drawings

[0011]

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Embodiments for Carrying Out the Invention

[0012] [Film] The film 1 to be printed is, from the perspective of shape, for example, a large-sized sheet-like shape as shown in FIG. 1. The planar shape of the sheet-like film 1 is, for example, a rectangular shape or a square shape. The size of the sheet-like film 1 is not particularly limited, but for example, it is vertical × horizontal = 10 cm or more and 100 cm or less × 10 cm or more and 100 cm or less. However, the shape of the film 1 is not limited to these. Note that the planar shape refers to the shape seen from the vertical direction with respect to the surface of the film. From the perspective of the layer structure, the layer structure of the film 1 may be a single layer or a multi-layer. When the film 1 is a multi-layer film, the number of layers is 2 or more, and there is no particular upper limit, but generally it is 10 or less. From a functional perspective, the film 1 may include a film having an optical function (hereinafter referred to as an "optical functional film"), or may be a film having no optical function (hereinafter referred to as a "film other than the optical functional film"). The thickness of the film 1 is not particularly limited, for example, it is 10 μm or more and 2 mm or less.

[0013] FIGS. 2 to 4 illustrate the layer structure of the film 1. The film 1 shown in FIG. 2 is, for example, a three-layer multi-layer film. The multi-layer film has, in order from the upper side of the paper surface, a first constituent layer 11, a second constituent layer 12, and a third constituent layer 13. The film 1 shown in FIG. 3 is a five-layer multi-layer film. The multi-layer film has, in order from the upper side of the paper surface, a fourth constituent layer 14, a fifth constituent layer 15, a sixth constituent layer 16, a seventh constituent layer 17, and an eighth constituent layer 18. The film 1 shown in FIG. 4 is a single-layer film. The single-layer film has a ninth constituent layer 19. The layers constituting the single-layer film and the multi-layer film are not particularly limited, and examples include an optical functional film; a surface protection film; a release liner; a film other than the optical functional film; an adhesive layer; any appropriate layer such as an overcoat layer; and the like.

[0014] To give some examples, for instance, in one example, the film 1 has a first constituent layer 11 shown in FIG. 2 as a surface protection film, a second constituent layer 12 as an adhesive layer, and a third constituent layer 13 as an optical functional film. In another example of the film 1, the first constituent layer 11 shown in FIG. 2 is a surface protection film, the second constituent layer 12 is an optical functional film, and the third constituent layer 13 is a film other than an optical functional film. In another example of the film 1, the first constituent layer 11 shown in FIG. 2 is a film other than an optical functional film, the second constituent layer 12 is an adhesive layer, and the third constituent layer 13 is a release liner. Also, in another example of the film 1, the fourth constituent layer 14 shown in FIG. 3 is a surface protection film, the fifth constituent layer 15 is an adhesive layer, the sixth constituent layer 16 is an optical functional film, the seventh constituent layer 17 is an adhesive layer, and the eighth constituent layer 18 is a release liner. In another example of the film 1, the fourth constituent layer 14 shown in FIG. 3 is a surface protection film, the fifth constituent layer 15 is an adhesive layer, the sixth constituent layer 16 is an optical functional film, the seventh constituent layer 17 is an adhesive layer, and the eighth constituent layer 18 is a surface protection film. Also, in another example of the film 1, the ninth constituent layer 19 shown in FIG. 4 is an optical functional film.

[0015] The optical functional film includes, for example, a polarizing film, a retardation film, an anti-reflection film, a light diffusion film, a brightness enhancement film, a light reflection film, etc. The polarizing film is a film having the property of transmitting light vibrating in a specific one direction (polarized light) and blocking light vibrating in other directions. The retardation film is a film showing optical anisotropy, and typically, for example, stretched films such as acrylic resins, cycloolefin resins, cellulose resins, etc. can be mentioned. The optical functional film may be composed of only one kind selected from the polarizing film, the retardation film, etc., or may be one in which two or more kinds selected from the polarizing film, the retardation film, etc. are laminated and adhered via a colorless and transparent adhesive or bonding agent.

[0016] Examples of the surface protection film include a substantially isotropic colorless and transparent film. Examples of the substantially isotropic colorless and transparent film include polyester resins such as polyethylene terephthalate and polyethylene naphthalate; cellulose resins such as triacetyl cellulose; polycarbonate resins; acrylic resins such as polymethyl methacrylate; styrene resins such as polystyrene; olefin resins such as polyethylene and polyolefins having a cyclic or norbornene structure; vinyl chloride resins; amide resins such as nylon 6; imide resins; sulfone resins; vinyl alcohol resins; vinylidene chloride resins; vinyl butyral resins; allylate resins; polyoxymethylene resins; etc. A resin film having such resins as main resin components can be used.

[0017] The release liner is a film for concealing the adhesive strength of the adhesive layer. The release liner has releasability with respect to the adhesive layer and is usually peeled off during use. The release liner is not particularly limited, but usually a film other than an optical functional film is used.

[0018] The adhesive layer has adhesiveness at normal temperature and its adhesiveness lasts for a long time. The adhesive layer is composed of a known adhesive. The adhesive is colorless and transparent, and examples thereof include acrylic adhesives, rubber adhesives, silicone adhesives, urethane adhesives, vinyl alkyl ether adhesives, polyvinyl pyrrolidone adhesives, polyacrylamide adhesives, cellulose adhesives, etc.

[0019] [Manufacturing Apparatus for Printing Film] FIG. 5 is a plan view of one exemplary manufacturing apparatus A, FIG. 6 is a front view of the same manufacturing apparatus A, and FIG. 7 is a left side view of the same manufacturing apparatus A. FIG. 8 is a cross-sectional view taken along line VIII-VIII of FIG. 6 and is a view of the arm portion 61 of the same manufacturing apparatus A as seen from below upward. In FIG. 6, a part of the stage portion is shown in cross-section. Also, in FIG. 8, the internal structure of the support portion 62 is not shown. Referring to FIGS. 5 to 8, the manufacturing apparatus A for a printing film performs a surface modification treatment on a film, and adheres an ultraviolet curable ink to the film by an inkjet method to print a desired display. The manufacturing apparatus A includes a base 63, a stage unit 2 provided on the base 63 for fixing a film to be printed, a modification treatment unit 3 movable in the lateral direction, an inkjet head unit 4 movable in the lateral direction, and an ultraviolet irradiation unit 5 for irradiating ultraviolet rays to cure the ultraviolet curable ink. Here, the longitudinal direction and the lateral direction refer to directions orthogonal to each other within a plane parallel to the surface of the film. The base 63 is a basic part of the apparatus for providing various parts (such as the stage unit 2) constituting the manufacturing apparatus A.

[0020] <Stage unit> The stage unit 2 temporarily fixes the film so that the film to be printed does not move inadvertently. Only one stage unit 2 may be provided, but it is preferably provided in plural from the viewpoint of shortening the working time. When a plurality of stage units 2 are provided, those stage units 2 are arranged side by side in the lateral direction on the base 63. In one embodiment, two stage units 2 are arranged side by side in the lateral direction. However, the stage unit 2 is not limited to two. Hereinafter, when explaining while distinguishing between the two stage units 2, one of them is referred to as the "first stage unit 2-1", and the other is referred to as the "second stage unit 2-2".

[0021] The first stage unit 2-1 is provided on the base 63. The first stage unit 2-1 includes a pedestal portion 23 for placing the film, a positioning portion 24 for positioning the film at a predetermined position of the pedestal portion 23, a holding means 25 for temporarily holding the film placed at the predetermined position of the pedestal portion 23, and a stage moving means 26 for moving the pedestal portion 23 in the vertical direction. The surface of the pedestal portion 23 of the first stage unit 2-1 is flat and sufficiently larger than the planar shape of the film. The positioning portion 24 of the first stage unit 2-1 is provided at two locations, for example, in directions orthogonal to each other in a plan view, corresponding to two sides of the film. The positioning portion 24 is formed of a thin plate body having substantially the same thickness as the film or slightly thicker than the thickness of the film, and is attached to the surface of the pedestal portion 23. By applying two sides constituting one corner portion of the film to the positioning portion 24, the film can be positioned. That is, by applying the film to the positioning portion 24, the film can be placed at a predetermined position on the pedestal portion 23. Hereinafter, the region on the surface of the pedestal portion 23 where the film is placed at a predetermined position is referred to as the "placement region".

[0022] The holding means 25 of the first stage unit 2-1 fixes the film placed in the placement region to the pedestal portion 23 so that the film does not move inadvertently. Further, the holding means 25 releases the fixing so that the printed film can be removed from the pedestal portion 23 after the printing operation is completed. The holding means 25 is not particularly limited, and for example, a mechanism for adsorbing the film with air can be used. The holding means 25 for adsorbing the film includes, for example, a vent hole 251 formed in the pedestal portion 23, a closed cavity portion 252 provided on the back surface side of the pedestal portion 23, and a suction machine (not shown) for sucking the air in the closed cavity portion 252. The vent hole 251 penetrates between the closed cavity portion 252 and the surface of the pedestal portion 23. By sucking the air in the closed cavity portion 252 with a suction machine such as a vacuum pump, the inside of the closed cavity portion 252 becomes a negative pressure, and the film is attracted and fixed to the surface of the pedestal portion 23 through the vent hole 251. On the other hand, when the suction by the suction machine stops, the inside of the closed cavity portion 252 returns to normal pressure, the adsorption of the film is released, and the film can be easily removed from the pedestal portion 23.

[0023] The stage moving means 26 moves the pedestal portion 23 in the vertical direction. The stage moving means 26 includes, for example, a guide rail 261 formed on the base 63, wheels 262 provided on the pedestal portion 23 and rolling along the guide rail 261, and an actuator (not shown) such as a motor for moving the pedestal portion 23 in the vertical direction. However, the stage moving means 26 is not limited to the guide rail 261 and the wheels 262, and may be composed of, for example, gears and belts. The first stage portion 2-1 in the home position can move from the first side in the vertical direction to the second side in the vertical direction so as to slide on the base 63 by a control unit (such as a computer) (not shown) operating the stage moving means 26, and can move to the second side in the vertical direction and also move to the first side in the vertical direction. Here, the first side in the vertical direction refers to one side in the vertical direction, and the second side in the vertical direction refers to the side opposite to the first side in the vertical direction.

[0024] The second stage portion 2-2 is arranged adjacent to the first stage portion 2-1 in the horizontal direction. The second stage portion 2-2 includes a pedestal portion 23, a positioning portion 24, a holding means 25, and a stage moving means 26. Since the configuration of the second stage portion 2-2 is the same as that of the first stage portion 2-1, the description thereof is omitted and the reference numerals are used as they are. Similar to the first stage unit 2-1, the second stage unit 2-2 can move from the home position in the longitudinal direction from the first side to the second side, and can also move from the second side to the first side in the longitudinal direction. The operation of the first stage unit 2-1 and the operation of the second stage unit 2-2 can be performed independently of each other. That is, the control for operating the first stage unit 2-1 and the control for operating the second stage unit 2-2 are independent of each other. For example, only the holding means 25 of the first stage unit 2-1 or the holding means 25 of the second stage unit 2-2 can be operated to fix and release the film, or the holding means 25 of the first stage unit 2-1 and the holding means 25 of the second stage unit 2-2 can be operated with a time difference or simultaneously to fix and release the film at their respective pedestal portions 23. Also, only the first stage unit 2-1 or the second stage unit 2-2 can be moved in the longitudinal direction, or the first stage unit 2-1 and the second stage unit 2-2 can be moved in the longitudinal direction simultaneously or with a time difference.

[0025] <Reforming treatment unit> The reforming treatment unit 3 performs a surface reforming treatment on the film. The surface reforming treatment is not particularly limited as long as it can improve the wettability of the surface of the film. Examples of the surface reforming treatment include corona discharge treatment, plasma treatment, ultraviolet irradiation treatment, infrared irradiation treatment, and the like. It is preferable to use corona discharge treatment because of its excellent cost performance and the difficulty of film deformation due to heat. The reforming treatment unit 3 that performs corona discharge treatment has a discharge electrode unit 31 and a grounded counter electrode unit. The reforming treatment unit 3 can generate a high potential difference between the discharge electrode unit 31 and the counter electrode unit and perform corona discharge treatment on the surface of the film existing therebetween. In the reforming treatment unit 3 of the illustrated example, the pedestal portion 23 of the stage unit 2 (the first and second stage units 2-2) is grounded, and the pedestal portion 23 also serves as the counter electrode unit.

[0026] The discharge amount of the corona discharge treatment can be set as appropriate. For example, the discharge amount is 3000 W·min / cm or more and 6000 W·min / cm or less in terms of the integrated irradiation power amount, and preferably 4600 W·min / cm 2 or more 2 or less, and preferably 4600 W·min / cm2 5600 W·min / cm or less 2 It is as follows.

[0027] The modification processing unit 3 is movable in the lateral direction and, further, is also movable in the vertical direction as necessary. The vertical direction is a direction orthogonal to each of the longitudinal direction and the lateral direction. Specifically, a support column portion 62 is erected on the base 63, and an arm portion 61 extending in the lateral direction is attached to the support column portion 62. The arm portion 61 may be fixedly attached to the support column portion 62. In order to enable the modification processing unit 3 and the like to move vertically, the arm portion 61 is attached to the support column portion 62 so as to be movable in the vertical direction. For example, a lifting device (not shown) is provided on the support column portion 62, and one end portion of the arm portion 61 is attached to the support column portion 62 via the lifting device. When the lifting device moves up and down, the arm portion 61 moves up and down following it. The end portion on the opposite side of the arm portion 61 is a free end. Note that a similar support column portion may be provided at the end portion on the opposite side of the arm portion 61 (not shown). The arm portion 61 is a linear member extending in the lateral direction and has a length sufficient to cross all the stage portions 2 (the first stage portion 2-1 and the second stage portion 2-2 in the illustrated example). Specifically, the horizontal length from the first lateral end to the second lateral end of a plurality of stage portions 2 arranged in the lateral direction is referred to as the "total stage length". As shown in FIG. 5, in the case of consisting of two stage portions 2, the total stage length corresponds to the length from the first lateral end of the second stage portion 2-2 to the second lateral end of the first stage portion 2-1. The arm portion 61 is sufficiently longer than the total stage length, and thus the arm portion 61 crosses all the stage portions 2.

[0028] The reforming processing unit 3 is provided with reforming unit moving means 33. The reforming unit moving means 33 moves the reforming processing unit 3 in the lateral direction. The reforming unit moving means 33 includes, for example, a guiding rail 331 formed on the second side portion of the arm portion 61, a wheel 332 that rolls along the guiding rail 331, and an actuator (not shown) such as a motor that moves the reforming processing unit 3 in the lateral direction. However, the reforming unit moving means 33 is not limited to the guiding rail 331 and the wheel 332, and may be composed of, for example, gears and belts, or may be composed of a rack and a pinion. The reforming processing unit 3 at the home position can move up and down by a control unit (such as a computer), not shown, operating the lifting device of the support column portion 62 to move the arm portion 61 up and down. Further, the reforming processing unit 3 can move from the first lateral side to the second lateral side along the arm portion 61 by the control unit operating the reforming unit moving means 33. In FIG. 5, the reforming processing unit 3 on the first lateral side is represented by a solid line, and the reforming processing unit 3 after moving to the second lateral side is represented by a two-dot chain line. After moving to the second side, the reforming processing unit 3 can also move to the first lateral side. Note that the first lateral side refers to one side in the lateral direction, and the second lateral side refers to the side opposite to the first side in the lateral direction. As described above, since the arm portion 61 is sufficiently longer than the total length of the stage, when the reforming processing unit 3 (the reforming processing unit 3 at the home position) at the end of the first lateral side of the arm portion 61 is moved to the end of the second lateral side of the arm portion 61, the reforming processing unit 3 crosses all the stage portions 2 (the first and second stage portions 2-2 in the illustrated example).

[0029] <Inkjet head unit> The inkjet head unit 4 prints a desired display on the surface-modified film. As the inkjet head unit 4, a conventionally known inkjet printing apparatus can be used. The method of the inkjet head unit 4 may be either a demand type or a continuous type such as a piezo method or a thermal method. Since it can be miniaturized and it is easy to accurately control the ink ejection amount, it is preferable to use a demand type inkjet head unit. Furthermore, since it does not require heat, a piezo type inkjet head unit is more preferable. The printing by the inkjet head unit 4 may be monochrome or color. For example, the inkjet head unit 4 is a serial type head for full-color printing that ejects four colors of ink and has a number of head nozzles 41 corresponding to each color. As the ink, an ultraviolet curable ink is used because it cures in a very short time and is also excellent in wear resistance. As the ultraviolet curable ink, conventionally known ones can be appropriately used.

[0030] The inkjet head unit 4 is movable in the horizontal direction and, further, movable in the vertical direction as required. Specifically, the inkjet head unit 4 is provided with an ink head moving means 42. The ink head moving means 42 moves the inkjet head unit 4 in the lateral direction. The ink head moving means 42 includes, for example, a guide rail 421 formed on the first side portion of the arm portion 61, a wheel 422 that rolls along the guide rail 421, and an actuator (not shown) such as a motor that moves the inkjet head unit 4 in the lateral direction. However, the ink head moving means 42 is not limited to the guide rail 421 and the wheel 422, and may be composed of, for example, gears and belts, or may be composed of a rack and a pinion. The inkjet head unit 4 is provided on the side opposite to the side (the first side portion of the arm portion 61) where the reforming treatment unit 3 is provided in the arm portion 61. When the arm portion 61 moves up and down by the lifting device of the support column portion 62, the inkjet head unit 4 at the home position can move up and down together with it. Further, the inkjet head unit 4 can move from the first lateral side to the second lateral side along the arm portion 61 when a control unit (such as a computer) (not shown) operates the ink head moving means 42. In FIG. 5, the inkjet head unit 4 on the first lateral side is represented by a solid line, and the inkjet head unit 4 after moving to the second lateral side is represented by a two-dot chain line. The inkjet head unit 4 can also move to the first lateral side after moving to the second side. As described above, since the arm portion 61 is sufficiently longer than the total length of the stage, when the inkjet head unit 4 (the inkjet head unit 4 at the home position) at the end of the first lateral side of the arm portion 61 is moved to the end of the second lateral side of the arm portion 61, the inkjet head unit 4 crosses all the stage portions 2 (the first and second stage portions 2-2 in the illustrated example).

[0031] <UV irradiation unit> The UV irradiation unit 5 irradiates UV rays to cure the UV-curable ink printed on the film. The ultraviolet irradiation unit 5 includes a housing 51, a light source 52 housed in the housing 51, and a control unit (not shown) that controls the light emission and extinction of the light source 52. The light source 52 is not particularly limited, and a mercury lamp, a metal halide lamp, an LED (Light Emitting Diode), an LD (Laser Diode), etc. can be used. Since it can be miniaturized compared to lamps such as mercury lamps and is difficult to generate heat, it is preferable to use an LED or an LD, and particularly, it is more preferable to use an LED. In the illustrated example, an LED is provided as the light source 52 inside the housing 51 with the lower side open.

[0032] The ultraviolet irradiation unit 5 is provided at the lower part of the arm part 61. Since the ultraviolet irradiation unit 5 is provided on the arm part 61, it can move up and down together with the arm part 61. The ultraviolet irradiation unit 5 may be configured to be movable in the lateral direction, but in the illustrated example, the ultraviolet irradiation unit 5 extends in the lateral direction and is longer than the entire length of the stage, and is fixedly attached to the arm part 61. Therefore, the ultraviolet irradiation unit 5 crosses all the stage parts 2. For this reason, when the light source 52 of the ultraviolet irradiation unit 5 emits light, ultraviolet rays can be irradiated over the entire lateral direction of the film. Note that the arrangement of the modification treatment unit 3, the inkjet head unit 4, and the ultraviolet irradiation unit 5 is in the order of the modification treatment unit 3 / ultraviolet irradiation unit 5 / inkjet head unit 4 from the first side to the second side in the vertical direction in a plan view.

[0033] [Operation of the method and apparatus for manufacturing a printed film] The printed film is obtained by printing an ultraviolet-curable ink by an inkjet method on a film subjected to a surface modification treatment and curing this ink. The method for manufacturing a printed film is carried out, for example, using the above-described manufacturing apparatus A having a stage part 2, a modification treatment part 3, an inkjet head part 4, and an ultraviolet irradiation part 5. The manufacturing method of the printing film includes a fixing step of fixing the film on the stage portion, a modifying step of moving the modifying treatment portion in the lateral direction of the film to perform a surface modification treatment on a strip-shaped region along the lateral direction of the surface of the film, a printing step of moving the inkjet head portion in the lateral direction of the film to print a plurality of displays along the lateral direction on the modified strip-shaped region, and a curing step of irradiating the strip-shaped region with ultraviolet rays from the ultraviolet irradiation unit 5.

[0034] <Fixing step> As shown in FIG. 9, the film 1 to be printed is placed on the placement region of the pedestal portion 23 of one stage portion 2 (for example, the first stage portion 2-1), and two sides of the film 1 are applied to the positioning portion 24 of the pedestal portion 23 for positioning. The operation of placing and positioning the film 1 on the pedestal portion 23 may be performed manually or by a mechanical operation such as using a film supply device. Next, the holding means 25 is actuated to adsorb the film 1 and fix it to the surface of the pedestal portion 23. The first stage portion 2-1 on which the film 1 is fixed is moved from the first side in the longitudinal direction to the second side by the stage moving means 26. At this time, the film 1 is moved to the second side in the longitudinal direction so that the vicinity of the second end portion in the longitudinal direction of the film 1 is located horizontally below the modifying treatment portion 3. In FIG. 9, the film 1 and the first stage portion 2-1 after being moved in the longitudinal direction are represented by a two-dot chain line.

[0035] <Modifying step> As shown in FIG. 10, the arm portion 61 is lowered to adjust the gap between the film 1 and the discharge electrode portion 31 of the surface modification unit 3. In the case of corona discharge treatment, usually, the gap between the discharge electrode portion 31 and the film 1 is set to about several millimeters. The arm portion 61 is lowered downward so as to form the gap. Next, while operating the surface modification treatment (discharge) of the surface modification unit 3, the surface modification unit 3 is moved laterally by the modification unit moving means 33. Initially, the surface modification unit 3 at the home position performs surface modification treatment (such as corona discharge treatment) on the surface of the first lateral end 1a of the film 1, and continuously performs surface modification treatment in the lateral direction of the film 1 as the surface modification unit 3 moves laterally. As soon as the surface modification unit 3 passes the second lateral end 1b of the film 1, the surface modification unit 3 is stopped. In FIG. 10, the surface modification unit 3 at the home position is represented by a solid line, the surface modification unit 3 during lateral movement is represented by a two-dot chain line, and the surface modification unit 3 stopped near the second lateral end 1b of the film 1 is represented by a one-dot chain line. When the surface modification unit 3 reaches the second lateral end 1b of the film 1, the surface modification treatment (discharge) temporarily stops along with the movement stop. In the case of corona discharge treatment, when stopping near the second lateral end 1b of the film 1, the application to the discharge electrode portion 31 is stopped.

[0036] By moving the surface modification unit 3 from the first side to the second side in the lateral direction, the surface of the film 1 in the strip-shaped region along the lateral direction is subjected to surface modification treatment. The strip-shaped region subjected to the surface modification treatment corresponds to the movement locus of the discharge electrode portion 31 of the surface modification unit 3. FIG. 11 is a plan view showing a state where the surface modification unit 3 stops after moving to the second lateral end 1b of the film 1. As shown in FIG. 11, first, in the vicinity of the second longitudinal end of the surface of the film 1, a strip-shaped region extending in the lateral direction is subjected to surface modification treatment. The width WB of the modified strip-shaped region B-1 is substantially equal to the width W31 of the discharge electrode portion 31 (reference sign WB is shown in FIG. 11, and reference sign W31 is shown in FIG. 8). In FIG. 11, the modified strip region B-1 is represented by small dashed lines (the modified strip regions shown in other figures are also represented by small dashed lines in the same way). Hereinafter, among the surfaces of the film 1, the modified strip region is referred to as the "modified strip region". The beginning of the strip region that was first modified is labeled "First", and the beginnings of the strip regions that are sequentially modified in time series are labeled "Second", "Third",... in order, and the beginning of the strip region that was last modified is labeled "nth".

[0037] After stopping the modification processing unit 3 at the second lateral end 1b of the film 1, as shown in FIG. 12, the first stage unit 2-1 is moved a predetermined amount to the second longitudinal side. That is, the first stage unit 2-1 is moved in the longitudinal direction, and the film 1 is shifted a predetermined amount to the second longitudinal side with respect to the first modified strip region B-1 (the strip region that was first modified on the surface of the film 1) as a reference. The modification processing unit 3 that was stopped near the second lateral end 1b of the film 1 is moved to the first lateral side by the modification unit moving means 33, and at the same time, the discharge is restarted to perform the modification processing. As the modification processing unit 3 moves in the lateral direction, the modification processing is continuously performed in the lateral direction of the film 1. When the modification processing unit 3 passes the first lateral end 1a of the film 1, the modification processing unit 3 is stopped. The modification processing unit 3 that has reached the first lateral end 1a of the film 1 temporarily stops the modification processing (discharge) together with the movement stop. In this way, by shifting the film 1 in the longitudinal direction and moving the modification processing unit 3 from the second lateral side to the first lateral side, as shown in FIG. 13, a second modified strip region B-2 extending along the lateral direction is formed. Thereafter, the modification process is performed in the same manner. That is, after forming the second modified strip region B-2, the stage unit 2 is moved a predetermined amount in the second longitudinal direction, so that the film 1 is shifted to the second longitudinal side with respect to the second modified strip region B-2 as a reference. The modification process unit 3 that had stopped near the first lateral end 1a is moved laterally to perform the modification process, and the movement and discharge of the modification process unit 3 are stopped near the second lateral end 1b of the film 1. As a result, as shown in FIG. 14(a), on the surface of the film 1, in order from the second longitudinal side to the first longitudinal side, the first modified strip region B-1, the second modified strip region B-2, and the third modified strip region B-3 are formed at intervals. In this way, the shift of the film 1, the lateral movement of the modification process unit 3, and the stop of the modification process unit 3 at the end are taken as one cycle, and this is repeated. When the modification process is completed, as shown in FIG. 14(b), a film 1 having a surface on which a plurality of modified strip regions B-1 to B-n are arranged in multiple stages in the longitudinal direction at intervals is obtained. In FIG. 14(b), in order from the second longitudinal side to the first longitudinal side, the first modified strip region B-1 / the second modified strip region B-2 / the third modified strip region B-3 / the fourth modified strip region B-4 / the fifth modified strip region B-5 / the sixth modified strip region B-6 / the nth modified strip region B-n are formed at equal intervals. However, the number of strip regions to be modified is not limited to the illustrated example.

[0038] <Printing process> After the modification process is completed, the arm unit 61 is moved upward or downward to adjust the gap between the film 1 and the inkjet head unit 4. The gap between the film 1 and the inkjet head unit 4 refers to a gap suitable for attaching ink to the film 1 by an inkjet method. When the gap between the film 1 and the inkjet head unit 4 substantially coincides with the gap between the film 1 and the discharge electrode unit 31, the vertical movement of the arm unit 61 is omitted.

[0039] As shown in FIG. 15, the first modified strip region B-1 of the film 1 is positioned horizontally below the inkjet head unit 4, and the first stage unit 2-1 is moved vertically by the stage moving means 26. Next, the inkjet head unit 4 is moved horizontally by the ink head moving means 42, and ultraviolet curable ink is ejected from the head nozzles of the inkjet head unit 4 to print a desired display on the first modified strip region B-1. Initially, the inkjet head unit 4 at the home position prints a plurality of displays along the horizontal direction from the first end 1a side to the second end 1b side in the horizontal direction of the film 1 (the first modified strip region B-1). When the inkjet head unit 4 passes the second end 1b in the horizontal direction of the film 1 (the first modified strip region B-1), the inkjet head unit 4 is stopped. In FIG. 15, the inkjet head unit 4 at the home position is represented by a solid line, and the inkjet head unit 4 that has reached and stopped at the second end in the horizontal direction is represented by a dashed line. In this way, as shown in FIG. 16(a), a film 1 with a plurality of displays C printed on the first modified strip region B-1 is obtained. As shown in the figure, the plurality of displays C may be printed at equal intervals in the horizontal direction, or, although not particularly shown, may be printed at random intervals in the horizontal direction. As will be described later, when punching out a plurality of products from the printed film 1, the plurality of displays C are printed at equal intervals in the horizontal direction. The content of the display C is not particularly limited, and examples include arbitrary characters, symbols, figures, patterns, and combinations thereof. In FIG. 16, a star mark is illustrated as an example of the display C. During the process of moving the inkjet head unit 4 horizontally, the inkjet head unit 4 prints the display C. As such an inkjet head unit 4, for example, commercially available products such as the product name "MK-G series" manufactured by Keyence Corporation can be used.

[0040] After printing the display C on the first modified strip region B-1, the first stage unit 2-1 is moved a predetermined amount in the second vertical direction by the stage moving means 26 so that the second modified strip region B-2 of the film 1 is located horizontally below the inkjet head unit 4. That is, the first stage unit 2-1 is moved in the vertical direction, and the film 1 is shifted by a predetermined amount to the second vertical side with respect to the first modified strip region B-1 as a reference. The inkjet head unit 4 that had been stopped at the second lateral end 1b of the film 1 is moved to the first lateral side by the ink head moving means 42 while discharging an ultraviolet curable ink to print a desired display C on the second modified strip region B-2. When the inkjet head unit 4 passes the first lateral end 1a of the film 1 (second modified strip region B-2), the inkjet head unit 4 is stopped. In this way, as shown in FIG. 16(b), a film 1 with a plurality of displays C printed on the second modified strip region B-2 is obtained. Thereafter, printing is performed in the same manner. That is, after printing the display C on the second modified strip region B-2, the stage unit 2 is moved a predetermined amount to the second vertical side to position the third modified strip region B-3 horizontally below the inkjet head unit 4. The inkjet head unit 4 near the first lateral end 1a is moved horizontally to print a plurality of displays C, and the inkjet head unit 4 that has reached the second lateral end 1b of the film 1 is stopped. In this way, one cycle consists of shifting the film 1 in the vertical direction, moving the inkjet head unit 4 in the horizontal direction, and stopping the inkjet head unit 4 that has reached the end, and this is repeated. When the printing process is completed, as shown in FIG. 16(c), a film 1 with a plurality of displays C printed on all the modified strip regions is obtained.

[0041] <Curing Process> After the printing process is completed, move the arm portion 61 upward or downward to adjust the gap between the film 1 and the ultraviolet irradiation unit 5. The gap between the film 1 and the ultraviolet irradiation unit 5 refers to a gap suitable for irradiating ultraviolet rays when curing the ultraviolet curable ink with ultraviolet rays. Note that even if the gap is about the same as the gap between the film 1 and the inkjet head portion 4 or larger than that, the ink is cured by ultraviolet irradiation, so it is not always necessary to move the arm portion 61 up and down after the printing process.

[0042] As shown in FIG. 17, move the first stage portion 2-1 in the vertical direction by the stage moving means 26 so that the first modified strip-shaped region B-1 of the film 1 is located below the ultraviolet irradiation unit 5. Note that it should be noted that the ultraviolet irradiation unit 5 provided below the arm portion 61 does not clearly appear in a plan view as shown in FIG. 17. Next, cause the light source 52 of the ultraviolet irradiation unit 5 to emit light. Since the ultraviolet irradiation unit 5 extends longer than the entire length of the stage in the horizontal direction, when the ultraviolet irradiation unit 5 emits light, the entire printed first modified strip-shaped region B-1 is irradiated with ultraviolet rays. For this reason, it is not necessary to move the ultraviolet irradiation unit 5 in the horizontal direction. By the irradiation of ultraviolet rays, all the displays C (ultraviolet curable ink) printed on the first modified strip-shaped region B-1 are cured.

[0043] After irradiating the first modified strip-shaped region B-1 with ultraviolet rays to cure the ultraviolet curable ink, move the first stage portion 2-1 a predetermined amount in the second side in the vertical direction by the stage moving means 26 so that the second modified strip-shaped region B-2 of the film 1 is located below the ultraviolet irradiation unit 5. That is, move the first stage portion 2-1 in the vertical direction and shift the film 1 by a predetermined amount so that the second modified strip-shaped region B-2 is located below the ultraviolet irradiation unit 5. That is, move the first stage portion 2-1 in the vertical direction and shift the film 1 by a predetermined amount to the second side in the vertical direction with respect to the first modified strip-shaped region B-1 as a reference. By irradiating the entire second modified strip-shaped region B-2 with ultraviolet rays by the ultraviolet irradiation unit 5, the display C (ultraviolet curable ink) printed on the second modified strip-shaped region B-2 is cured. Thereafter, ultraviolet irradiation is similarly performed. That is, after irradiating the second modified strip region B-2 with ultraviolet rays, the stage unit 2 is moved by a predetermined amount in the second lateral direction in the vertical direction, so that the third modified strip region B-3 is positioned below the ultraviolet irradiation unit 5. By irradiating the entire third modified strip region B-3 with ultraviolet rays by the ultraviolet irradiation unit 5, the display C (ultraviolet curable ink) printed on the third modified strip region B-3 is cured. In this way, the vertical displacement of the film 1 and the ultraviolet irradiation by the ultraviolet irradiation unit 5 are taken as one cycle, and this is repeated.

[0044] Note that the ultraviolet curable ink cures when irradiated with ultraviolet rays for a predetermined time. The irradiation time of ultraviolet rays on the modified strip region is, for example, 0.1 second to 2 seconds, preferably 0.2 second to 1 second. Therefore, in the above curing step, while the light source 52 of the ultraviolet irradiation unit 5 is emitting light, the first stage unit 2-1 (film 1) is continuously moved at a constant speed in the vertical direction while irradiating ultraviolet rays from the first modified strip region B-1 to the nth modified strip region B-n. In this way, by curing the display C printed on all the modified strip regions, a film 100 (referred to as "printed film 100" in this specification) on which printing is completed is obtained. The holding means 25 of the first stage unit 2-1 is released, and the printed film 100 is removed from the first stage unit 2-1.

[0045] <Manufacture of Printed Film Using Other Stage Units> In the above, the case where the film 1 is fixed to one stage unit 2 for printing has been described. However, since the manufacturing apparatus A has a plurality of stage units 2, printing can also be performed by fixing the film 1 to another stage unit 2. For example, when the manufacturing apparatus A has two stage units 2 (the first stage unit 2-1 and the second stage unit 2-2) as described above, in the same manner as the first stage unit 2-1, the film 1 can be fixed to the second stage unit 2-2 for printing. Regarding the description of the printing of the film 1 using the second stage unit 2-2, in the above <fixing step>, <modifying step>, <printing step> and <hardening step>, "the first stage unit 2-1" is replaced with "the second stage unit 2-2", and the specific description thereof is omitted. By using the manufacturing apparatus A provided with a plurality of stage units 2, printing of a plurality of films 1 can be completed in a short time. Specifically, it takes a relatively long time to position and fix the film 1 to the stage unit 2. In order to print the display C at an accurate position, it is necessary to accurately fix the film 1 at a predetermined position of the pedestal portion 23 of the stage unit 2, and this accurate positioning work takes a relatively long time. By having a plurality of stage units 2, for example, as shown in FIG. 18, while the film 1 is fixed to the first stage unit 2-1 for printing, the film 1 can be placed on the pedestal portion 23 of the second stage unit 2-2 for positioning work. Then, after the printing of the film 1 using the first stage unit 2-1 is completed, the printing of the film 1 fixed to the second stage unit 2-2 is performed. While this printing is being carried out, the printed film 100 of the first stage unit 2-1 is removed, and the work of positioning and fixing the next film 1 to the first stage unit 2-1 is performed, and this is repeated. By doing so, the working time can be shortened.

[0046] [Use of the Printed Film] The printed film 100 is used for any suitable application. For example, when the film 1 has an optical function, the printed film 100 can be used for optical applications. Examples of optical applications include image display devices such as liquid crystal displays, optical films such as anti-reflection films, sunglasses, electromagnetic wave shields, window glasses, etc., and the printed film 100 is incorporated and used in these. The printed film 100 is cut into a shape suitable for the application as needed. For example, as shown in FIG. 19, by punching or cutting the printed film 100 to form a cutting line 7 corresponding to the outer shape of the product on the printed film 100, a plurality of products 110 can be obtained from the printed film 100.

[0047] [Advantages] According to the above manufacturing method, a modification process is performed on the strip-shaped region (the region where the display C is printed) along the horizontal direction on the surface of the film 1, and a plurality of modified strip-shaped regions are formed at intervals at positions shifted in the vertical direction. Therefore, compared with the case where the entire surface of the film 1 is modified with almost no gaps, the modification time can be shortened. Furthermore, after the strip-shaped region is modified, that is, after the modified strip-shaped region is formed, ink is ejected to print the display C. Therefore, the modified strip-shaped region is stable, and compared with the case where ink is adhered immediately after the modification process as in the prior art, the ink can be satisfactorily adhered to the modified strip-shaped region. For this reason, a beautiful display C can be printed on the film 1. Further, after all the modified strip-shaped regions are formed on the film 1, the printing process is performed. Therefore, a long time interval from the modification process to the printing can be ensured, and a more beautiful display C can be printed on the film 1. In particular, after the first modified strip-shaped region B-1 to the nth modified strip-shaped region B-n are formed (after all the modified strip-shaped regions are formed), printing is performed in the order of the first modified strip-shaped region B-1 to the nth modified strip-shaped region B-n. Therefore, the time interval from the modification process to the printing in each strip-shaped region is substantially constant. Also, in the modification process, when the modification processing unit 3 is moved to the second end portion 1b or the first end portion 1a in the horizontal direction of the film 1, the surface modification process is temporarily stopped. Therefore, it is possible to prevent the end portion of the film 1 and the parts of the apparatus from being damaged by discharge, and the safety is also excellent. Furthermore, in the curing process, since ultraviolet rays are irradiated onto the entire printed one strip-shaped area (one modified strip-shaped area to which ink has adhered), the ultraviolet irradiation time for the ink can be ensured to be relatively long, and the ink can be cured well. Specifically, in order to cure the ultraviolet-curable ink well, it is desirable to perform ultraviolet irradiation for about 1 second as described above. However, when ultraviolet rays are irradiated on each of a plurality of displays (ink-attached portions) at the above time for each individual display, the overall processing time (the time from the modification process to obtaining the printed film 100 through the curing process) becomes long. In this regard, as described above, by irradiating ultraviolet rays onto the entire printed one strip-shaped area, ultraviolet rays can be irradiated simultaneously to a plurality of displays in the strip-shaped area. Therefore, compared with the case of irradiating ultraviolet rays for each individual display, the time for curing the ink well is shortened, and it is possible to prevent the overall processing time from becoming long. Thus, the printed film 100 with a plurality of good displays can be manufactured relatively quickly.

[0048] [Modification Example] In the above, since the modification processing unit 3, the inkjet head unit 4, and the ultraviolet irradiation unit 5 are provided on one arm unit 61, there is an advantage that the manufacturing apparatus A can be miniaturized. However, the modification processing unit 3, the inkjet head unit 4, and the ultraviolet irradiation unit 5 may be provided on separate arm units (not shown). Also, in the above, since the stage unit 2 moves in the vertical direction and the modification processing unit 3, the inkjet head unit 4, and the ultraviolet irradiation unit 5 do not move in the vertical direction, the control of each unit can be simplified. However, for example, at least one of the modification processing unit 3, the inkjet head unit 4, and the ultraviolet irradiation unit 5 may be configured to be movable in the vertical direction (not shown).

[0049] Furthermore, a supply device for supplying the film 1 to the stage unit 2 may be attached to the manufacturing apparatus A. FIG. 20 shows the manufacturing apparatus A equipped with the supply device 8. The supply device 8 has a plurality of suction parts 81 that adsorb to the surface of the film 1. The supply device 8 adsorbs one film 1 from the first container case 88 that houses a large number of films 1 to be printed, transports this to the pedestal part 23 on the stage part 2, releases the suction, and places the film 1 on the pedestal part 23. Further, the supply device 8 adsorbs the printed film 100, transports this to the second container case 89, releases the suction, and performs an operation of housing the printed film 100 in the second container case 89. The manufacturing device A has the same configuration as the above [manufacturing device for printed films], but it is preferable that an orientation adjustment means 9 for adjusting the orientation of the film 1 is further provided on the stage part 2. When the supply device 8 is used, it may not be possible to accurately place the film 1 at a predetermined position on the pedestal part 23 in the placement area of the pedestal part 23. For this reason, it is preferable that the orientation adjustment means 9 is provided on the stage part 2. The orientation adjustment means 9 includes at least one imaging device 91 arranged above the stage part 2, a fine adjustment device (not shown) for rotating and moving the stage part 2 in the vertical and horizontal directions, and a control part (not shown) that processes the image from the imaging device 91 and operates the fine adjustment device. After placing the film 1 on the pedestal part 23 of the stage part 2 using the supply device 8, the film 1 is fixed to the pedestal part 23 by the holding means 25. Next, the imaging device 91 images the film 1 (for example, images the corner parts or edge parts of the film 1), and the control part checks whether the film 1 is fixed at a predetermined position on the pedestal part 23. When the control part determines that there is a misalignment, the fine adjustment device is operated, and the stage part 2 at the home position is rotated a little and / or moved a little in the vertical and horizontal directions to adjust the orientation of the film 1. In this way, the film 1 can be positioned accurately, and afterwards, the printing operation of the film 1 is performed in the same manner as above.

Explanation of reference numerals

[0050] 1 Film 100 Printed film 2, 2-1, 2-2 Stage part 3 Modification processing part 4 Inkjet head part 5 Ultraviolet irradiation unit A manufacturing apparatus B-1, B-2, B-3, B-4, B-5, B-6, B-n Modified strip regions C Display

Claims

1. In a method for manufacturing a printed film by printing an ultraviolet-curable ink by an inkjet method on a film subjected to a surface modification treatment, using an apparatus having a stage section, a modification treatment section movable in the lateral direction, an inkjet head section movable in the lateral direction, and an ultraviolet irradiation section, a step of fixing a film on the stage section, a modification step of moving the modification treatment section in the lateral direction of the film to perform a surface modification treatment on a strip-shaped region along the lateral direction of the surface of the film, a printing step of moving the inkjet head section in the lateral direction of the film to print a plurality of displays along the lateral direction in the modified strip-shaped region, a curing step of irradiating the strip-shaped region with ultraviolet rays from the ultraviolet irradiation section, the method for manufacturing a printed film having the above steps.

2. The modification step is a step of moving the modification treatment section in the lateral direction of the film to perform a surface modification treatment on a strip-shaped region along the lateral direction, a step of moving the modification treatment section in the lateral direction of the film at a position shifted in the longitudinal direction from the modified strip-shaped region as a reference to perform a surface modification treatment on a strip-shaped region along the lateral direction, and repeating this process in order, The method for manufacturing a printed film according to claim 1, wherein after a plurality of the modified strip-shaped regions are formed on the film, the printing step is performed.

3. The modification step is including moving the modification treatment section from the first end portion in the lateral direction of the film to the second end portion, and then moving the modification treatment section from the second end portion in the lateral direction of the film to the first end portion, The method for manufacturing a printed film according to claim 1, wherein when the modification treatment section is moved to the second end portion in the lateral direction of the film, the surface modification treatment by the modification treatment section is temporarily stopped.

4. The printing step is a step of moving the inkjet head section in the lateral direction of the film to print a plurality of displays in one modified strip-shaped region, a step of moving the inkjet head section in the lateral direction of the film at a position shifted in the longitudinal direction from the strip-shaped region where the display is printed as a reference to print a plurality of displays in the next modified strip-shaped region, and repeating this process in order, the method for manufacturing a printed film according to claim 2.

5. The curing step is performed after printing displays on all the modified strip-shaped regions by the printing step, The curing step is a step of irradiating ultraviolet rays over the entire one printed strip-shaped region among the printed strip-shaped regions. A step of irradiating the entire printed one strip-shaped area with ultraviolet rays at a position shifted in the vertical direction from the strip-shaped area that has been irradiated with ultraviolet rays, and repeating this step in order, the method for manufacturing a printed film according to claim 4.

6. The method for manufacturing a printed film according to any one of claims 1 to 5, wherein the surface modification treatment includes a corona discharge treatment.

7. In a manufacturing apparatus that performs a surface modification treatment on a film and prints ultraviolet curable ink on the film by an inkjet method, A stage unit for fixing the film, the stage unit including a plurality of stage units arranged side by side in the horizontal direction, A surface modification treatment unit movable in the horizontal direction, An inkjet head unit movable in the horizontal direction, And an ultraviolet irradiation unit, The plurality of stage units are configured to be independently movable in the vertical direction, A manufacturing apparatus for a printed film, wherein the surface modification treatment unit and the inkjet head unit are configured to be movable in the horizontal direction so as to cross the plurality of stage units.

Images