JP2003344628A - Irregular pattern sheet, reproduction plate of irregular pattern and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate useless scrapping of a part in which a part transferring the joint of duplicate plates of an irregular pattern is not impressed. <P>SOLUTION: The manufacturing method is provided with: a first filling process S2 for filling a groove A on the joint of a hologram plate 80A with an UV curing resin 84 of a groove filling part; a first curing process S3 for curing the UV curing resin 84, by pressing a light transmissive sheet 91 on the UV curing resin 84 filled by the first filling process S2; a second filling process S4 for filling the groove A with an UV curing resin 85 of a finished part; and a second curing process S5 for curing the UV curing resin 85, by pressing a hologram original plate sheet 94 on the UV curing resin 85 filled by the second filling process S4. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an uneven pattern in which an optically variable pattern such as a hologram or a diffraction grating or unevenness of a polishing tape is formed, an uneven pattern duplicate plate for duplicating the pattern, and a production of the duplicate plate. It is about the method.

[0002]

2. Description of the Related Art Conventionally, as a method for reproducing a hologram,
It is disclosed in Japanese Patent Publication No. 6-85103, Japanese Patent Publication No. 6-85104 and Japanese Patent Publication No. 7-104600. Figure 4
Is a diagram showing an example of a hologram duplication device, and FIG.
FIG. 3 is an enlarged view showing the vicinity of a transfer device of the device. In the hologram duplication device 10, a sheet feeding device 20, a transfer device 30, an irradiation device 50, and a winding device 60 are sequentially arranged on a pair of main body frames 12 fixed to a bed 13.

The sheet feeding device 20 is provided with a shaft 22 rotatably supported by a roller 23 fixed to the main body frame 12, and the winding roll 21 of the hologram forming film 1 is mounted on the shaft 22. The tip is connected to a powder brake (not shown).

The transfer device 30 includes an embossing roller 31 having a shaft 32 rotatably supported by a bearing fixed to the central portion of the body frame 12, a pressing roller 40 rotatably supported by a pair of arms 42, And a pressure mechanism 38. The pressurizing mechanism 38 includes a pair of arms 42 and an air cylinder 45,
An attachment 47 is attached to the tip of the piston rod 46 of the air cylinder 45, and the attachment 47 is attached to the arm 42.
The air cylinder 45 is rotatably supported by a pin 48 at the lower center of the air cylinder 45, and the air cylinder 45 is rotatably supported by a pin 49 fixed to the main body frame 12. The pair of arms 42 includes a rod 44
Is fixedly connected by and is rotatably supported by a pin 43 fixed to the main body frame 12.

Therefore, the piston rod of the air cylinder 45
By the operation of 46, the arm 42 rotates about the pin 43 as a fulcrum,
The pressing roller 40 is pressed against the embossing roller 31. The pressing roller 40 is equipped with a heating device (not shown) to heat the surface of the pressing roller 40.

As shown in FIG. 5, the embossing roller 31 is provided with a hologram original plate 4 on its peripheral surface, and a resin plate as a hologram original plate attached to the peripheral surface of the cylinder is used. The driving end of the shaft 32 of the embossing roller 31 is connected to a driving means (not shown). The embossing roller 31 is equipped with a cooling device (not shown) to cool the roller surface.

The irradiating device 50 is a body frame separated by a distance.
At a position facing the winding roller 51 that is rotatably supported by the main body 12, a main body frame 12 is provided via a support member (not shown).
The hologram forming film 1 which is fixed to the winding roller 51 and is wound around the winding roller 51 is irradiated with ultraviolet rays or electron beams.

The winding device 60 comprises a shaft 62 rotatably supported by a roller 63 fixed to the main body frame 12 and a powder clutch (not shown). The hologram forming film 1 is wound on the shaft 62. It is designed to be kicked.

Further, between the embossing roller 31 and the sheet feeding device 20, guide rollers 71 and 72 rotatably supported by the main body frame 12 are provided, and between the embossing roller 31 and the winding roller 51. Therefore, a guide roller 73 is provided near the embossing roller 31.

Next, the operation of the hologram copying apparatus 10 described above will be described. First, the hologram forming film 1 fed from the paper feeding device 20 is guided to the embossing roller 31 via the guide rollers 71 and 72. At this time, the hologram forming film 1 is adjusted to an appropriate tension by the bower brake.

Then, by the operation of the air cylinder 45, the pressing roller 40 presses the film 1 against the embossing roller 31 with a constant pressure. Since the surface of the pressing roller 40 is heated, the resin layer 3 is softened, and as shown in FIG. 5, the irregularities of the hologram original plate 4 are transferred to the resin layer 3, and the resin layer 3 adheres to the hologram original plate 4. In this state, the embossing roller 31 is rotated by the drive motor, and the resin layer 3 having the irregularities is peeled off from the hologram master 4 in the vicinity of the guide roller 73.

At this time, the surface of the embossing roller 31 is
Since it is cooled, the resin layer 3 in a softened state is hardened to some extent, and even if it is peeled from the hologram original plate 4, it is guided to the next winding roller 51 without breaking the uneven shape at the time of transfer. Film 1 wrapped around winding roller 51
Then, the irradiation device 50 irradiates the resin layer 3 with ultraviolet rays or electron beams to cure the resin layer 3 having the irregularities. Here, since the winding roller 51 is cooled, it is possible to prevent the film 1 from generating heat and shrinking due to irradiation with ultraviolet rays or electron beams.

Thereafter, the film 1 is wound on the shaft 62 connected to the drive motor 14. At this time, since the film 1 is adjusted to an appropriate tension by the bower clutch, the film 1 is wound without wrinkles or the like.

[0014]

In the hologram copying apparatus 10 described above, the hologram master 4 is attached to the embossing roller 31, but the joints of the hologram master 4 are transferred to the web-shaped film 1 and There is a problem that the yield is poor because some parts cannot be used. Further, since the seams are transferred to the endless tint block pattern, the required specifications without seams are not satisfied.
Therefore, conventionally, in order to avoid the joint, mark printing such as alignment is performed on the joint to limit the use area.

An object of the present invention is to provide a concavo-convex pattern sheet such as an optically variable pattern or an endless tint block pattern concavo-convex pattern in which the joint-transferred part of the concavo-convex pattern duplication plate is not conspicuous and the part need not be wastefully discarded. An uneven pattern duplication plate for duplicating the uneven pattern sheet and a method for producing the duplicate plate.

[0016]

In order to solve the above-mentioned problems, the invention of claim 1 is an uneven pattern sheet having an uneven pattern formed on a surface thereof, wherein two wavy boundary lines have a predetermined interval. It is a concavo-convex pattern sheet formed by.

According to a second aspect of the present invention, there is provided a concavo-convex pattern replica plate in which one end and the other end of one concavo-convex pattern plate or one end and the other end of a plurality of concavo-convex pattern plates are connected to be integrated, and in the vicinity of the joint. In addition, the corrugated pattern replica plate is characterized in that two wavy boundary lines are formed.

According to a third aspect of the present invention, in a method of manufacturing a concave-convex pattern replica plate in which a concave-convex pattern plate having a concave-convex pattern mold is attached to a plate mounting member, a filling step of filling a molding material into a groove formed at a joint between the concave-convex pattern plates. And a curing step of pressing the original plate on which the reverse pattern of the concavo-convex pattern mold is pressed against the molding material filled in the filling step to cure the molding material, the concavo-convex pattern duplication plate. Is a manufacturing method.

According to a fourth aspect of the present invention, in a method for manufacturing a concave / convex pattern replica plate in which a concave / convex pattern plate having a concave / convex pattern mold is attached to a plate mounting member, the groove formed in the joint of the concave / convex pattern plate is filled with a groove. A first filling step of filling a molding material, a first curing step of pressing the covering member against the molding material filled in the first filling step to cure the molding material, and finishing the groove A second filling step of filling the same amount of the molding material, and an uneven pattern original plate having an inverse pattern of the uneven pattern type is pressed against the molding material filled in the second filling step to cure the molding material. And a second curing step.

According to a fifth aspect of the present invention, in the method for producing an uneven pattern replica plate according to the fourth aspect, the covering member is a light-transmitting uneven pattern original plate. This is a method for producing a duplicate plate. According to a sixth aspect of the present invention, in the method for manufacturing an uneven pattern duplication plate according to the fourth or fifth aspect, the covering member is
The film thickness is 50 μm or less.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings. Figure 1
FIG. 3 is a diagram showing an embodiment of a method for producing a concavo-convex pattern duplication plate according to the present invention, FIG. 2 is a diagram explaining the reason for performing the first curing step of the method for producing an irregular pattern duplication plate according to the present embodiment, FIG. FIG. 3 is a diagram showing an embodiment of an uneven pattern duplication plate according to the present invention. In addition, the embossing roller 31 of FIG.
Is a cylindrical shape, and the optically variable pattern duplication plate 80 of the present embodiment is attached to the outer periphery thereof, but is drawn in a plane for ease of illustration.

In the manufacturing method of this embodiment, a winding step STEP (hereinafter, simply referred to as S) 1, a first filling step S2, a first curing step S3, and a second filling step S are provided.
4, a second curing step S5, a peeling step S6, and the like.

As shown in FIG. 1A, the winding step S1 is a step of winding a sheet-shaped hologram plate 80A prepared in another step around an embossing roller (hereinafter also referred to as a plate cylinder) 31. . The hologram version 80A
Base sheet 81 made of PET or the like having improved adhesion by corona discharge treatment of about 100 μm or easy adhesion treatment, and the base sheet
It is formed on the lower side of 81 and is about 60μ for sticking to the plate cylinder 31.
m pressure-sensitive adhesive layer 82 and 5 formed on the upper side of the base sheet 81.
It is made of UV resin having a thickness of up to 30 μm, and is provided with a fine embossing layer 83 on which hologram embossing such as a tint block and a continuous pattern is formed. At this time, in the hologram plate 80A, the depth of the groove A formed at the joint between the one end 80a and the other end 80b is about 180 μm, which is the sum of the above layers.

In the first filling step S2, as shown in FIG. 1B, the groove A formed at the joint of the hologram duplication plate 80A is formed.
In this step, the UV curable resin 84 which is a molding material for filling the groove is filled. In the first curing step S3, as shown in FIG. 1 (c), the UV-curable resin 84 filled in the first filling step S1 is pressed against the light-transmissive sheet 91 such as a PET sheet to expose UV92. In this step, the UV curable resin 84 is cured by irradiation.

The second filling step S4 is a step of filling the groove A with the UV curable resin 85 for the finish, as shown in FIG. 1 (d). In the second curing step S5, as shown in FIG. 1 (e), the UV of the finished portion filled in the second filling step S4 is used.
A light-transmissive original sheet 93 having an inverted hologram type is pressed against the cured resin 85 and irradiated with UV94,
This is a step of curing the UV curable resin 85.

In the peeling step S6, as shown in FIG. 1 (f), the finish portion U hardened in the second hardening step S5 is used.
This is a step of peeling the hologram master sheet 93 from the V-curing resin 85.

First coating step S2 and first curing step S
3 (hereinafter referred to as the first step) and the second coating step S
The reason why the fourth step and the second curing step S5 (hereinafter referred to as the second step) are performed in two stages is as follows. 1
The step of the first time is a groove filling step for filling the groove A, and it is preferable that the groove A is almost completely filled by the first step. The second step is a finishing step for eliminating the joint. That is, in the first step, volume contraction occurs during the first curing step S3,
Although the concave portion B is formed in the UV curable resin 84, the concave portion B can be filled by performing the second step.

First coating step S2 and second coating step S
4, the UV curable resin 84, 85 is the fine embossed layer 83.
Is applied to the surface (outside) of the
Even if it spills out, accurately control the amount of resin dropped
It is preferable to set it to 3 mm. Therefore, the resin width at the final joint is about 5 mm.

First coating step S2 and second coating step S4
In the above, the ratio of the amount of resin dropped is preferably about 2: 3. In the second coating step S4, the amount of the UV curable resin 85 is slightly increased, and the UV curable resin 84 in the first coating step S2 is used.
This is because it covers the. If the UV curable resin 84 dropped at the first time is exposed on the surface, the embossed pattern of the hologram may be destroyed when the hologram master sheet 93 is laminated in the second curing step S5. If the emboss pattern is crushed, the part may be darkened a little and the joint may be recognized.

Next, the reason for carrying out the first curing step S3 will be further explained. FIG. 2 shows one end 80a of the hologram duplication plate 80A.
The other end 80b is exaggeratedly drawn, and the hologram replica plate 80A made of resin has a sharp cut end,
In addition to being crushed, it is in a warped state.
Therefore, when the holographic plate 80A is stiff, the bubbles E are likely to enter the warped portion D thereof. Figure 2
As shown in the plan view of (a), since the bubbles E enter, it becomes very noticeable.

Therefore, the light-transmissive sheet 91 has a function of stretching the UV curable resin 84 and leveling the hologram plate 80A, rather than covering it. Therefore, since the embossed pattern is formed in the second step, the light transmissive sheet 91 need not have the embossed pattern in the first step.

At this time, it is preferable that the light-transmissive sheet 91 to be covered has a film thickness of 50 μm or less and is adhered thereto. When the thickness is about 50 to 100 μm, the bubbles E are likely to enter because of the elasticity. That is, in the first step, the UV curable resin 84 is applied and cured in order to flatten the end portion where the joint portion is raised, and in the second step, it is flattened in the first step. A fine embossed pattern is formed on the end.

In the hologram duplication plate 80B produced as described above, the boundary lines C1 and C2 between the joint portion 85a formed by the curing of the UV curable resin 85 and the fine embossed layer 83 shown in FIG. As shown in FIG. 3, there are two wavy shapes. Then, the linear fine embossed pattern surrounded by the joint portion 85B is provided on the fine embossed pattern of the fine embossed layer 83. Therefore, the duplicated sheet 1 will appear in the opposite way. Also, the joint part 85
The height of a is continuously and smoothly changed, and the maximum height thereof is about 20 to 30 μm, and the transferred pattern is hardly visible or visually touched.

The present invention is not limited to the embodiment described above, and various modifications and changes can be made, which are also within the scope of the present invention. (1) Although described with the example of the fine embossed pattern of the hologram, it includes all optical variable patterns called OVD (optical variable device) such as a light diffraction pattern and a grain having fine irregularities of 2 to 10 μm.

(2) The curing step is performed twice, and in the first step, the flat original light-transmissive sheet such as PET is covered and cured, but the hologram original sheet is also used twice. You may make it cover.

(3) Although the example of performing the first step and the second step in two steps has been described, the first step can be omitted. For example, (a) soft or thin (eg, 50
This can be omitted by using a hologram plate (resin plate) 80A (PET or the like having a size of μm or less), and (b) cutting the end face of the hologram plate 80A into a clean end face with a laser or the like. However, performing the above-described two-step process has an effect that it can be easily manufactured with existing equipment.

(4) Although an example of producing a hologram duplication plate for producing a tint block or continuous pattern has been described, if the material of the UV curable resin is changed to a rigid one, the joints are smoothed and fine irregularities are formed on the surface. It can also be used as a replica plate for producing a polishing tape for an optical fiber.

(5) As described in the example of attaching to the plate cylinder,
It may be a joint where two or more duplicate plates are pasted on the planographic printing plate. It can also be applied to smoothing the seams of the plate in the portion without the fine pattern. In this case, in addition to connecting the patterns, it is very stable during copying, and is very effective for improving the surface accuracy of the plate cylinder.

(6) The description has been made by taking the resin replica plate as an example.
The present invention can be applied to filling the groove of the metal plate such as nickel by selecting the UV curable resin. (7) The light-transmissive sheet or the light-transmissive hologram original sheet (covering member) to be covered does not have to be light-transmissive when it can be cured by being irradiated with light from the inside of the roll plate.

[0040]

As described above in detail, according to the present invention, the portion of the concavo-convex pattern duplication plate to which the joint is transferred is not conspicuous, and it is not necessary to wastefully discard the portion.
It is possible to produce with a high yield and to produce an endless tint block pattern without a joint.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a method for manufacturing an uneven pattern duplication plate according to the present invention.

FIG. 2 is a diagram illustrating the reason for performing the first curing step of the method for manufacturing the uneven pattern duplication plate according to the present embodiment.

FIG. 3 is a diagram showing an embodiment of an uneven pattern duplication plate according to the present invention.

FIG. 4 is a diagram showing an example of a hologram duplication device.

5 is an enlarged view showing the vicinity of a transfer device of the device of FIG.

[Explanation of symbols]

80A hologram version 80B hologram reproduction version 81 Base material sheet 82 Adhesive layer 83 Fine embossed layer 84,85 UV curing resin 91 Light-transmissive sheet 92 hologram original sheet

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Fumihiko Mizukami             1-1-1, Ichigaya-Kagacho, Shinjuku-ku, Tokyo             Dai Nippon Printing Co., Ltd. F-term (reference) 2H049 AA25 AA43 AA68                 2K008 AA17 GG05                 4F204 AA36 AA44 AH73 EA03 EB02                       EB11 EB25 EB29 EF01 EF05                       EF46 EK07 EK18

Claims (6)

[Claims] 1. A concavo-convex pattern sheet having a concavo-convex pattern formed on its surface, wherein two corrugated boundary lines are formed at a predetermined interval. 2. A concavo-convex pattern replica plate in which one end and the other end of one concavo-convex pattern plate or one end and the other end of a plurality of concavo-convex pattern plates are connected to be integrated, and two concavo-convex pattern plates are provided in the vicinity of the joint. An uneven pattern duplication plate characterized in that a wavy boundary line is formed. 3. A method of manufacturing an uneven pattern duplication plate, in which an uneven pattern plate having an uneven pattern die is attached to a plate mounting member, comprising a filling step of filling a groove formed in a joint of the uneven pattern plate with a molding material. A method for producing a concavo-convex pattern replica plate, comprising: a curing step of pressing an original plate on which a reverse pattern of a concavo-convex pattern mold is pressed against the molding material filled in the filling step to cure the molding material. . 4. A method for manufacturing a duplicate plate of an uneven pattern in which an uneven pattern plate having an uneven pattern die is attached to a plate mounting member, wherein a groove formed at the joint of the uneven pattern plate is filled with a molding material for filling the groove. A first filling step, a first curing step of pressing the covering member against the molding material filled in the first filling step to cure the molding material, and a finishing molding material in the groove. Second filling step of filling, and second hardening for hardening the molding material by pressing an uneven pattern original plate having a reverse pattern of the uneven pattern mold against the molding material filled in the second filling step A method of manufacturing a concavo-convex pattern replication plate, comprising: 5. The method for producing a concave-convex pattern replica plate according to claim 4, wherein the covering member is a light-transmitting concave-convex pattern original plate. . 6. The method for manufacturing an uneven pattern replica plate according to claim 4, wherein the coating member has a thickness of 50 μm or less,
And a method for producing a duplicated plate of a concavo-convex pattern.