JP2017074702A - Printing plate, printing plate manufacturing method, printed material, and printed material manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printing plate for printing a printed layer having an asymmetric shape in a cross section orthogonal to an extending direction of a print line, a manufacturing method of the printing plate, a printed matter having the printed layer having an asymmetric shape, and a manufacturing method of the printed matter.SOLUTION: A printing plate includes a concave part formed on a surface thereof, and a plating layer formed on a surface of the concave part. The concave part has an asymmetric shape in a cross section orthogonal to a direction in which the concave part extends.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a printing plate, a printing plate manufacturing method, a printed material, and a printed material manufacturing method.

  A gravure offset printing method is known in which ink is transferred from a printing plate in which concave portions are filled with ink by a doctor blade to a blanket, and the ink is transferred onto a substrate. For example, Patent Document 1 discloses that a gravure offset printing method is used as a method for printing a patterned wiring structure in a method for manufacturing a conductive member for a touch panel having a wiring structure.

JP2015-45891A

  In the method using a printing plate which is an intaglio plate produced by an etching method as in Patent Document 1, the groove shape of the plate is symmetrical in the cross section perpendicular to the direction in which the groove extends, and the printed material also has that shape. Is transferred to form a symmetrical shape in a cross section perpendicular to the direction in which the printed line extends. However, for example, a printed matter having an asymmetric shape in a cross section perpendicular to the direction in which the printed line extends in order to form a printed matter with anisotropic light extraction efficiency, such as a micromirror or a Fresnel lens, or a viewing angle limited. May be required.

  The present invention has been made in view of such problems, and its object is to provide a printing plate for printing a printing layer having an asymmetric shape in a cross section orthogonal to the direction in which the printing line extends, An object of the present invention is to provide a printing plate manufacturing method, a printed material having a printed layer having an asymmetric shape, and a printed material manufacturing method.

  One embodiment of the present invention for solving the above problems includes a recess formed on the surface and a plating layer formed on the surface of the recess, and the recess is in a cross section orthogonal to the direction in which the recess extends. A printing plate having an asymmetric shape.

  Another aspect of the present invention is the above-described printing plate manufacturing method, in which the concave portion formed on the surface of the printing plate is formed by cutting with a cutting blade.

  Another embodiment of the present invention includes a printed material and a printed line formed on the surface of the printed material, and has a non-symmetrical shape in a cross section orthogonal to a direction in which the printed line extends. It is.

  Another aspect of the present invention includes a step of applying ink to the printing plate using the printing plate described above, a step of transferring the ink applied to the printing plate to a blanket, and an ink transferred to the blanket. And a step of transferring to a printed body.

  According to the present invention, a printing plate for printing a printing layer having an asymmetric shape in a cross section perpendicular to the direction in which the printing line extends, a method for producing a printing plate, a printed matter having a printing layer having an asymmetric shape, A method for producing a printed material can be provided.

Schematic diagram illustrating a printing apparatus and a method for producing a printed material according to an embodiment of the present invention. Schematic diagram illustrating a printing apparatus and a method for producing a printed material according to an embodiment of the present invention. Schematic diagram illustrating a printing apparatus and a method for producing a printed material according to an embodiment of the present invention. The perspective view which shows the printing plate base material before the cutting process in the manufacturing method of the printing plate which concerns on embodiment of this invention. The perspective view which shows the printing plate base material after the cutting in the manufacturing method of the printing plate which concerns on embodiment of this invention Sectional drawing which shows the principal part of the cutting blade used for the cutting in the manufacturing method of the printing plate which concerns on embodiment of this invention. The top view which shows the printing plate which concerns on embodiment of this invention Sectional drawing which shows the printing plate which concerns on embodiment of this invention Sectional drawing of the printed matter which concerns on embodiment of this invention

(Embodiment)
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1 to 3 are schematic diagrams for explaining a printing apparatus 1 according to an embodiment of the present invention and a printed material manufacturing method using the same. The printing apparatus 1 includes a blanket 2 and a printing plate 3. The blanket 2 is fixed to the surface of a rotatable blanket cylinder 4 and is arranged so that the ink 6 can be transferred to a substrate 5 to be printed. The printing plate 3 is fixed to the upper surface of the platen fixing platen 9 and is disposed at a position where the ink 6 can be transferred to the printing surface of the blanket 2. The blanket cylinder 4 is rotatably supported by a carriage 7, and the carriage 7 is supported by the mount 8 so as to be movable on the mount 8. The substrate 5 is fixed to the upper surface of the base plate 10 for fixing the substrate.

  The blanket 2 performs transfer printing by transferring ink 6 on the printing plate 3 on its surface. The surface of the blanket 2, that is, the printing surface is made of a rubber layer. Various known materials can be used as the rubber material used as the rubber layer. These rubber materials are selected according to the type of the ink 6 and the solvent used in the ink 6, and those having a solvent absorbability are suitable.

  Although the rubber layer alone can be used as the blanket 2, the rubber layer may be provided on the base substrate. The rubber layer made of the rubber material can be formed by curing the rubber material on the base substrate, or can be formed by bonding the rubber material on the film to the base substrate. The base substrate is not particularly limited as long as it is a flexible film or a thin metal plate because it is attached to the blanket cylinder 4 at the time of printing, but polyester film such as polyethylene terephthalate (PET) because of cost and dimensional stability. Or a polyimide film is suitable. For example, silicone rubber can be used for the rubber layer. Moreover, a primer layer and an adhesive layer are provided between the base substrate and the rubber layer as necessary. Further, a cushion layer is provided under the base substrate as necessary. A sponge-like material can be used for the cushion layer. The blanket 2 is fixed to the substantially cylindrical blanket cylinder 4 by winding both ends in the width direction with a mounting tool (not shown).

  As will be described in detail later, the printing plate 3 is formed with a concave portion corresponding to a printing pattern formed on the substrate 5 on a copper plate, a metal plate such as a nickel plate, or a glass plate, and chromium plating or carbon plating on the surface thereof. It is formed by forming an abrasion-resistant film. The ink 6 is filled into the recesses of the printing plate 3 at a constant speed by a doctor blade.

As the ink 6, for example, a thermosetting and photo-baking type conductive ink can be used. The conductive ink is, for example, a metal such as Au, Pt, Ag, Cu, Ni, Cr, Rh, Pd, Zn, Co, Mo, Ru, W, Os, Ir, Fe, Mn, Ge, Sn, Ga, and In. Suitable are fine particles, conductive metal oxide fine particles such as ITO (indium tin oxide), ZnO (zinc oxide), SnO ₂ (tin oxide), or metal nanowires. In the present embodiment, these can be used as fillers for the ink 6. As the conductive ink containing metal fine particles, for example, a conductive silver nanoink in which silver nanoparticles are dispersed in an organic solvent can be used.

  When creating a transparent electrode layer, a conductive polymer whose conductivity has been improved by doping, such as conductive polyaniline, conductive polypropylol, conductive polythiophene (polyethylenedioxythiophene and polystyrenesulfonic acid complex, etc.) Ink can be used.

  In the conductive silver nanoink, the solvent in the ink is dodecane or tetradecane. Any solvent can be used in the ink. For example, fast-drying inks are low-boiling solvents (MEK, ethanol, acetone, etc.) that dry at room temperature, water-based inks are water (purified water), and oil-based inks are oils that do not evaporate at room temperature (aliphatic hydrocarbons, glycol ethers, Higher alcohol etc.) can be used. Depending on the type of solvent, the material of the blanket 2 having the absorbability can be selected.

In addition, the resin material used as the ink 6 may be a transparent resin, a colored resin, or an opaque resin. That is, for example, polycarbonate resin, acrylic resin such as PMMA (polymethyl methacrylate (polymethyl methacrylate), fluorine acrylic resin, silicon acrylic resin, epoxy acrylate resin, polystyrene resin, acrylonitrile styrene resin, cycloolefin polymer, methyl Styrene resin, fluorene resin, PET (polyethylene terephthalate), polypropylene, phenol resin, melamine resin, PEN (polyethylene naphthalate), PI (polyimide), COC (cyclic olefin copolymer), MS (styrene methacrylate copolymer), General-purpose plastics such as thermoplastic resins such as epoxy resins and thermosetting resins can be used.
In addition to the above, engineer plastics such as PBT (polybutylene terephthalate), POM (polyoxymethyl), PA (polyamide), and PPS (polyphenyl sulfide), and super engineer plastics can be used.

  The printing medium 5 in the present embodiment is fixed to the upper surface of the base plate 10 for fixing the base material. The substrate 5 is, for example, a glass plate such as soda lime glass, low alkali borosilicate glass, non-alkali aluminoborosilicate glass, or polyethylene terephthalate (PET), triacetyl cellulose (TAC), polymethyl methacrylate (PMMA), A plastic plate or plastic film made of polycarbonate (PC) or the like is used. The to-be-printed body 5 can be made into a film made of PET having a thickness of 125 μm, for example. In addition, as the printed material 5, other materials, for example, a sheet (prepreg) made of glass fiber and epoxy resin used for an electronic substrate can be used, and other resin materials, paper, and non-woven fabric may be used. . The printing medium 5 is not limited to a sheet-like material, and may be hollow or solid, and any plane or curved surface can be used as a printing surface.

  In addition, the printing apparatus 1 includes a control unit 11 in order to control each unit of the printing apparatus 1. A feed mechanism for the blanket cylinder 4, the carriage 7, the printing plate fixing surface plate 9, and the base material fixing surface plate 10 is electrically connected to the control unit 11. The control unit 11 can be a known computer and includes a CPU, ROM, RAM, input / output port, storage device, display device, input / output device and the like interconnected by a data bus. The control unit 11 fills the printing plate 3 with ink using a doctor blade (not shown), feeds and rotates and moves the blanket cylinder 4 according to operator input, inputs from various sensors, and a control program stored in the ROM. , Movement of the carriage 7, operation of the feed mechanism for the platen fixing platen 9 and substrate fixing platen 10, and the operation of the ink 6 on the printing medium 5 such as thermosetting and light baking, and the blanket 2 It is comprised so that the drying operation | movement with respect to can be linked and controlled.

(Printing method)
Next, a printing method (printed material manufacturing method) using the printing apparatus 1 configured as described above will be described. In the initial state and the end state of the preprinting step, the carriage 7 is in a state of stopping on the right side in the drawing as shown in FIG.

  First, the printing plate 3 is immersed in the ink 6 in, for example, an ink reservoir, the ink is guided to the concave portion of the printing plate 3 by a doctor blade (not shown), and excess ink overflowing from the surface of the printing plate 3 is removed. Ink 6 is filled. The speed at which the ink 6 is taken out by the doctor blade is, for example, 150 mm / s.

  Next, as shown in FIG. 2, the printing plate 3 is moved by the movement of the carriage 7 in the direction of arrow B1, that is, the direction in which the printing plate 3 is arranged, and the rotation of the blanket cylinder 4 in the direction of arrow A, that is, rotation in a predetermined direction. The ink 6 is transferred to the printing surface of the blanket 2 by continuously contacting the ink 6 filled in the blanket 2. The transfer speed to the blanket 2 can be performed, for example, at 50 mm / s. When the ink 6 contains a solvent, the printing surface of the blanket 2 has an absorbability that can absorb the solvent in the ink 6, so that wetting and spreading of the ink 6 formed on the printing surface of the blanket 2 is suppressed. Thereafter, the blanket 2 to which the ink 6 has been transferred is moved to the installation position of the printing medium 5 by the movement of the carriage 7 in the arrow B2 direction, that is, the direction in which the printing medium 5 is arranged.

  Next, as shown in FIG. 3, the ink 6 transferred onto the blanket 2 by the movement of the carriage 7 in the direction of arrow B <b> 2 and the rotation of the blanket cylinder 4 in the direction of arrow A causes the printing surface of the substrate 5 to be printed. Transcribed. The rotational speed of the printing surface of the blanket 2 is substantially matched with the moving speed of the carriage 7, whereby the ink 6 is pressed against the substrate 5 and transferred. The transfer speed to the substrate 5 can be performed at, for example, 200 mm / s. A part of the ink 6 remaining on the printing surface of the blanket 2 without being transferred is removed by, for example, a cleaning roller (not shown). In this embodiment, the carriage 7 is moved at the time of transfer, but the relative position between the blanket cylinder 4 and the printing plate fixing platen 9 and the relative position between the blanket cylinder 4 and the base plate fixing platen 10 are as follows. As long as the change can be realized, the printing plate fixing platen 9 and the base plate fixing platen 10 may be moved, and the carriage 7, the printing plate fixing platen 9, and the base plate fixing platen 10 are three. May be moved respectively.

  Thereafter, the ink 6 transferred onto the printing medium 5 is cured. This curing is performed by various means depending on the type and components of the conductive ink to be used, such as baking, heating, natural drying, ultraviolet curing, and cooling (when using a conductive ink containing a thermoplastic material). be able to. In the case of heating, for example, an infrared heater can be used. In this way, a printed matter is obtained. Note that when the swelling amount of the blanket 2 reaches a predetermined reference value, the printing apparatus may be provided with a function of drying the solvent absorbed in the blanket 2 during printing standby.

  Various materials other than those in the printing apparatus 1 can be selected as the material for the printing surface of the blanket 2, the type of ink 6 to be used, and the type of solvent in the ink.

  The blanket 2 is used by being fixed to the cylindrical blanket cylinder 4, but the shape of the blanket 2 in use may be a curved surface or a plane other than the cylindrical shape. The printed material 5 may be a sheet-like one, such as a resin molded product, and a printed surface having a curved surface.

(Formation of printing plate)
The printing plate 3 in the present embodiment is formed by cutting the printing plate base material 20. 4 and 5 show a process of processing the printing plate base material 20.

  As shown in FIG. 4, the printing plate base material 20 is formed by laminating a copper plating layer 22, a release layer 23, and a copper ballad layer 24 in order from the inside on the surface of a cylinder 21 made of, for example, Al, Ni, and Fe. Do it.

  As shown in FIG. 5, the printing plate base material 20 is rotated about the axis C. A plurality of recesses 25 parallel to each other are formed by performing cutting by applying a cutting blade 30 (see FIG. 6) in the rotation direction of the printing plate base material 20 toward the copper ballad layer 24. The depth of the recess 25 can be set to 10 μm, for example. The concave portion 25 may extend in the circumferential direction of the printing plate base material 20 or may extend in a spiral shape. The recesses 25 extend in the circumferential direction by alternately performing the formation (cutting movement) of the recesses 25 by cutting and the relative movement (feeding movement) along the axis C between the printing plate base material 20 and the cutting blade 30. Can be made. Moreover, the recessed part 25 can be extended helically by performing the cutting movement and the feed movement simultaneously and continuously. It is also possible to change the width of the concave portion 25 by changing the cutting depth of the cutting blade toward the axis C in a stepless manner or in a plurality of steps.

  A recess 25 having one apex similar to the shape of the cutting blade is formed in the printing plate base material 33 by cutting the cutting blade. The recess 25 is formed using a cutting blade 30 as shown in FIG. The cutting blade 30 has a normal line D, that is, a normal line in the cutting depth direction, and an oblique line 30b having an inclination angle α, and a normal line D, that is, a normal line in the cutting depth direction, and an oblique line 30c having an inclination angle β. And the oblique line 30b and the vertex 30a formed by the intersection of the oblique line 30c.

  The inclination angles formed by the two oblique lines 30b and 30c with respect to the printing plate base material 33 are different from each other, and the inclination formed by the one oblique line 30b with respect to the cutting depth direction is different. The angle α is, for example, 25 °, and the inclination angle β formed by the other oblique line 30c with respect to the depth in the cutting direction is, for example, 65 °. The cut portion substantially matches the shape of the cutting blade.

  In FIG. 7, the top view of the printing plate 34 which has the recessed part 32 (32a, 32b, 32c) formed using the cutting blade 30 is shown. The cross-sectional shape of the printing plate is defined by oblique lines, but may be a curved shape as long as it does not hinder cutting. FIG. 8 shows a cross-sectional view taken along the arrow E-E ′ of the printing plate 34 in which the recess 32 is formed. In order to create such a printing plate 34, in the cutting process as described above, first, the printing plate base material 33 is first cut by the cutting blade 30 to form the recess 32a, The printing plate base material 33 and the cutting blade 30 are relatively moved (feeded) in the width direction of the concave portion 32a by a distance larger than the cutting width of the concave portion 32a, and then the printing plate base material 33 is again moved by the cutting blade 30. The recess 32b is formed by cutting. The recess 32c is formed by repeating this cutting movement and feeding movement once again.

  After such a cutting process, a chromium plating layer (not shown) is formed on the entire surface of the copper ballad layer 24 in order to improve wear resistance. Then, by peeling the copper ballad layer 24 from the release layer 23, a flat plate 34 as shown in FIG. 7 is obtained. Each of the plurality of recesses 32a, 32b, and 32c has a cross-section orthogonal to the longitudinal direction of the recess 32 (that is, the cross-section shown in FIG. 8) in the width direction of the recess 32 (the left-right direction on the paper surface of FIG. Have an asymmetrical shape.

The asymmetrical shape mentioned here refers to a cross-sectional shape that is not line-symmetric with respect to the normal line in the cutting depth direction of the cutting blade in the cross-sectional shape in the extending direction of the concave portion. On the other hand, a cross-sectional shape that is line symmetric with respect to the normal line in the cutting depth direction of the cutting blade is referred to as a symmetric shape.

  In this embodiment, a cutting blade having different inclination angles formed by the two oblique lines with respect to the depth of cut is used in this embodiment, but the angle formed by the two oblique lines with respect to the depth of cut is the same. A cutting blade may be used to tilt the blade itself with respect to the cutting depth. Moreover, you may manufacture by cutting with a laser, for example. Further, the printing plate may be manufactured by a multistage etching method or a multistage plating method.

(Cross sectional shape of ink transferred by printing plate)
By curing and / or baking the ink transferred by the printing apparatus 1 including the printing plate 34 according to the present embodiment, an ink layer (printing layer) 35 is formed on the substrate 5 as shown in FIG. A printed matter 40 is obtained. FIG. 9 shows a cross-sectional shape of the ink layer 35 in a cross section orthogonal to the direction extending to the printing line of the substrate 5. As illustrated, the cross-sectional shape of the ink layer 35 after transfer and drying is asymmetric in the width direction of the ink layer 35 corresponding to the cross-sectional shape of the cutting blade 30. The cross section of the ink layer 35 includes two curves 35b and 35c on the printing medium 5 and is formed by intersecting the curves 35b and 35c from the printing medium 5 in the direction of arrow F, that is, on the printing medium 5. It has a vertex 35a. The inclination angles of the two curves 34 and 36 are different from each other with respect to the normal line in the direction of the arrow F, that is, the direction perpendicular to the vertex 35a of the ink layer 35 from the printing medium 5; That is, the angle formed with respect to the direction of the ink layer 44 from the printed matter 46 shown in FIG. 9 falls within a predetermined range from 65 °, for example. Due to this, in the present embodiment, it is possible to provide a printed matter 40 having different reflected light intensity depending on the viewing direction.

(Other)
The present invention is not limited to the modes shown in the embodiments, and includes all modifications, applications, and equivalents included in the concept of the present invention defined by the claims. Therefore, the present invention should not be construed as being limited, and can be applied to any other technique belonging to the scope of the idea of the present invention.

  For example, in the above embodiment, the transfer is performed using a flat plate, but the transfer is not limited to this, and the transfer may be performed using a cylinder-shaped printing plate.

  In the embodiment using the cutting blade 30, the cutting is performed by the cutting blade 30 having the single vertex 30 a constituted by the oblique lines 30 b and 30 c, but by the irregular cutting blade having the plurality of vertices 30 a. Cutting may be performed.

  In the above embodiment, the ink is transferred to the printing medium via the blanket, but the ink may be transferred directly from the printing plate to the printing medium.

  In the above embodiment, the printing pattern of the ink is formed on the printing body. However, after the printing pattern is formed on the printing body, the printing body is removed and the printing pattern is formed. It is good also as an aspect which hold | maintains the shape only by.

In the above-described embodiment, the conductivity imparted to the ink can provide a printed matter having various functions and uses such as authentication by energizing the printed layer and a printed matter that can be used as an electric circuit member. .

  The present invention is useful for production of various functional printed materials.

DESCRIPTION OF SYMBOLS 1 Printing apparatus 2 Blanket 3 Printing plate 4 Blanket cylinder 5 To-be-printed body 6 Ink 7 Carriage 8 Stand 9 Printing plate fixing surface plate 10 Base plate fixing surface plate 11 Control part 20, 33 Printing plate base material 21 Cylinder 22 Copper plating Layer 23 Peeling layer 24 Copper ballad layer 30 Cutting blade 25, 32 (32a, 32b, 32c) Recess 34 Printing plate 35 Ink layer 40 Printed matter

Claims (4)

A recess formed on the surface;
A plating layer formed on the surface of the recess,
The said recessed part is a printing plate which has an asymmetrical shape in the cross section orthogonal to the direction where the said recessed part extends. A method for producing a printing plate according to claim 1,
A method for producing a printing plate, wherein a recess formed on the surface of the printing plate is formed by cutting with a cutting blade. A substrate to be printed;
A printing line formed on the surface of the substrate,
A printed matter having an asymmetric shape in a cross section perpendicular to the direction in which the printed lines extend. Using the printing plate according to claim 1,
Applying ink to the printing plate;
Transferring the ink applied to the printing plate to a blanket;
Transferring the ink transferred to the blanket to a printing medium;
A method for producing printed matter comprising:

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