JP4059778B2 - Decorative plate and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a decorative plate and a manufacturing method thereof, and more particularly, a decorative plate capable of preventing an image from dropping even if it is a minute decorative pattern, and preventing injuries due to wear and contact even if the pattern has a sharp edge. It relates to the manufacturing method.
[0002]
[Prior art]
For articles with fine and complex shapes such as roses for clocks and decorative parts, a resist film is formed on the surface of the metal plate on the surface of the metal plate except for these image forming parts. A conductive portion is formed along the shape of these images, and a metal is deposited on the conductive portion by an electrodeposition method to form an electrodeposition image as a decorative pattern such as time letters, and this decorative pattern is used as an adhesive. Once transferred and supported on a supporting substrate such as a film through a layer, an adhesive layer for fixing is formed on the exposed surface of the decorative pattern, and the adhesive for fixing is peeled off from the supporting substrate. Adhering to an adherend such as a display panel for a watch through a layer is widely performed. For example, Patent Documents 1 and 2 disclose various electrodeposition imaging methods and improvements thereof.
[0003]
Such a decoration pattern is also used as a display member (decoration plate) for displaying a manufacturer name and a product name. However, points such as “i” and “j” in the alphabet are extremely small, and even if they are attached to an adherend through an adhesive layer for fixing, they will drop off due to insufficient adhesive strength. was there.
Further, according to the electrodeposition imaging method, sharp edges are formed at acute angle portions in the alphabets “V” and “W”. The sharp corners are easily worn and may be caught on clothing fibers or cause injury.
[0004]
In order to solve such a problem, the present applicant has proposed a decorative plate in which an electrodeposition image is sealed in a heat-meltable resin layer in Patent Document 3. According to this decorative plate, since the electrodeposition image is sealed in the resin, even if it is a minute electrodeposition image, there is no dropout of the image, and even an image with a sharp edge is injured due to wear and contact. Can be prevented. However, since the electrodeposition image surface is covered with resin, the metal luster inherent in the electrodeposition image is lost.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 7-331479 [Patent Document 2]
JP-A-8-27597 [Patent Document 3]
Japanese Patent Laid-Open No. 2002-20596
[Problems to be solved by the invention]
The present invention is a decorative plate using a decorative pattern and a method of manufacturing the same, and in particular, even if it is a fine decorative pattern, an image is not dropped, and even an image with a sharp edge can prevent injuries due to wear and contact, It is another object of the present invention to provide a decorative plate that can effectively use the metallic luster inherent in the decorative pattern and a method for manufacturing the decorative plate.
[0007]
[Means for Solving the Problems]
In the decorative plate manufactured by the method of the present invention, the total thickness of the decorative pattern and the ultraviolet curable adhesive layer is preferably in the range of −50 μm to +1000 μm with respect to the depth of the recess .
[0008]
The decorative pattern used in the present invention may be an electrodeposition image or an etching image.
The method for producing a decorative plate according to the present invention includes:
On the support member, a decorative pattern selected from an electrodeposition image and an etching image and having a thickness of 20 μm to 1000 μm is formed to be aligned and temporarily attached.
Transferring the decorative pattern to an application tape having a first UV curable adhesive layer;
Irradiating the first ultraviolet curable adhesive layer with ultraviolet rays to reduce the adhesive force;
Further, a second ultraviolet curable adhesive layer is formed on the surface to which the decorative pattern is adhered,
The total thickness of the decorative pattern and the ultraviolet curable adhesive layer for fixing the decorative pattern having substantially the same shape is 500 to 500 μm in thickness having concave portions in the range of −50 μm to +1000 μm with respect to the depth of the concave portions. A decorative pattern is fitted to the concave portion of the adherend made of a plate-like metal having a thickness of 5000 μm or various synthetic resins via the second ultraviolet curable adhesive layer,
Irradiate ultraviolet rays from the application tape side,
The decorative pattern is covered with an ultraviolet curable adhesive layer that is concealed by the decorative pattern and maintains an uncured state where ultraviolet rays do not reach and has sufficient adhesive strength, and the acute angle portion at the end is the surface of the adherend. Fixed in the recess so as not to protrude from the
It is characterized by peeling the application tape from the decorative pattern.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the decorative plate and the manufacturing method thereof according to the present invention will be described more specifically with reference to the drawings.
As shown in FIG. 1, the decorative plate 10 includes an adherend 1 having a recess 2 and a decorative pattern 3 having substantially the same shape as the recess 2, and the decorative pattern 3 is an ultraviolet curable adhesive in the recess. It is fixed via the layer 4.
[0010]
The adherend 1 is made of metal or various synthetic resins . Further, the thickness of the adherend 1 is not particularly limited, and varies depending on the use of the decorative plate 10, and is appropriately selected depending on the total thickness of the decorative pattern and the ultraviolet curable adhesive layer described later. Generally, it is 500-5000 micrometers . On the surface of the adherend 1, there is formed a recess 2 in which a decoration pattern 3 to be described later is accommodated. The formation method of the recessed part 2 is various according to the material of the to-be-adhered body 1, and the method according to a material is selected suitably. For example, press molding or etching may be used, and in the case of a synthetic resin, molding using a mold may be used. The contour shape of the recess 2 is substantially the same as that of the decorative pattern 3. That is, the width and length of the recess 2 are set slightly larger than the decorative pattern 3 . When configuring the recess slightly larger is the shape similar decorative pattern 3, and the width of the decorative pattern is set to 100 to 300 [mu] m size eyes to the length. As will be described later, the depth of the recess 2 is appropriately set in consideration of the thickness of the decorative pattern 3 and the ultraviolet curable adhesive layer 4.
[0011]
The decorative pattern 3 may be an electrodeposited image produced by a known electrodeposition image method described in, for example, JP-A-7-331479, JP-A-8-27597, etc., or an etching method, press Or a fine pattern produced by a laser beam cutting method. Among these, in the present invention, an electrodeposition image or a fine pattern obtained by an etching method (hereinafter sometimes referred to as an etching image) is particularly preferable. In the present invention, as the decorative pattern 3, in many cases, a decorative pattern having a character / graphic pattern such as a manufacturer name, a trade name, or a trademark is used. However, the decorative pattern 3 is not limited to these and includes various decorative patterns. Also good.
[0012]
The thickness of the decorative pattern 3, 20 to 1000 .mu.m, preferably 30～950Myuemu, particularly preferably 30～900Myuemu. The surface of the decorative pattern 3 may be provided with a pattern, or may be colored or finish-plated.
The decorative pattern 3 is fixed in the concave portion of the adherend 1 via an ultraviolet curable adhesive layer 4. The ultraviolet curable adhesive has a property of being polymerized and cured by ultraviolet irradiation to reduce or disappear the adhesive force, and various ultraviolet curable adhesives are known. Generally, the adhesive strength before ultraviolet irradiation is 1270 g / 25 mm width or more, and the adhesive strength is drastically reduced by ultraviolet irradiation to 30 g / 25 mm width or less.
[0013]
Representative examples of UV curable pressure sensitive adhesives include, but are not limited to, photopolymerizable compounds such as addition polymerizable compounds having two or more unsaturated bonds and alkoxysilanes having an epoxy group, and carbonyl Examples thereof include rubber pressure-sensitive adhesives and acrylic pressure-sensitive adhesives containing a photopolymerization initiator such as compounds, organic sulfur compounds, peroxides, amines, and onium salt compounds (Japanese Patent Laid-Open No. 60-196956). Issue gazette). The blending amounts of the photopolymerizable compound and the photopolymerization initiator are generally 10 to 500 parts by weight and 0.1 to 20 parts by weight per 100 parts by weight of the base polymer, respectively.
[0014]
In the decorative plate 10 of the present invention, the decorative pattern is fixed in the recess 2 through the uncured ultraviolet curable adhesive layer 4. The thickness of the ultraviolet curable adhesive layer 4 is preferably 10 to 60 μm, more preferably 15 to 50 μm, and particularly preferably 15 to 30 μm.
In the decorative plate 10 of the present invention, the total thickness of the decorative pattern 3 and the ultraviolet curable adhesive layer 4 is −50 μm to +1000 μm, more preferably −45 μm to +950 μm with respect to the depth of the concave portion 2. In particular, it is preferably in the range of −40 μm to +900 μm.
[0015]
According to the decorative plate 10 according to the present invention, since the decorative pattern 3 is fixed in the concave portion 2 of the adherend 1 via the ultraviolet curable adhesive layer 4, There will be no loss of images. Further, by setting the total thickness of the decorative pattern 3 and the ultraviolet curable adhesive layer 4 and the depth of the concave portion 2 as described above, the acute angle portion of the decorative pattern end protrudes from the adherend surface. Therefore, even if the image pattern has a sharp edge, it is possible to prevent injuries due to wear and contact. Furthermore, since the surface of the decorative pattern is exposed, when the decorative pattern is made of metal, the metallic luster inherent to the metal pattern can be effectively used, and the decorativeness can be improved. However, in the present invention, it is of course acceptable to form a resin layer for coloring or the like on the decorative pattern surface.
[0016]
Next, the manufacturing method of the decoration plate 10 is demonstrated to this invention.
First, the decorative pattern 3 is formed on the support member 11 so as to be aligned and temporarily attached. Such a decorative pattern 3 may be manufactured by applying an electrodeposition imaging method described in, for example, Japanese Patent Application Laid-Open Nos. 7-331479 and 8-27597, and the support member 11 A decorative pattern 3 aligned and temporarily attached on the pressure-sensitive adhesive sheet by sticking a metal foil onto the pressure-sensitive adhesive sheet using a pressure-sensitive adhesive sheet or the like, and patterning the metal foil by an etching method, a press method, or a laser beam cutting method. May be formed.
[0017]
In the present invention, the process management pattern 9 may be formed so as to surround the decoration pattern 3 simultaneously with the formation of the decoration pattern 3. Such a process management pattern 9 is finally removed, but can be used as a mask when forming the second ultraviolet curable pressure-sensitive adhesive layer 4 described later. The process management pattern 9 may be formed with holes used for alignment and the like.
[0018]
The decorative pattern 3 aligned and temporarily attached here is a state in which the decorative pattern as a whole shows a character / graphic pattern such as a manufacturer name, a product name, and a trademark, and is fixed on the support member 11 so as to be peelable. State.
As such a decorative pattern 3, an electrodeposition image or an etching image is particularly preferable from the viewpoint of ease of manufacture.
[0019]
For example, the etching image is formed by using a pressure sensitive adhesive sheet or the like as the support member 11, attaching a metal foil on the pressure sensitive adhesive sheet, forming a resist film on the metal foil, and then exposing and developing. This is performed by etching and finally removing the resist film. By such a method, an etching image as a decorative pattern is obtained in an aligned and temporary state on the adhesive sheet.
[0020]
In particular, in the present invention, a conductive film 5 is formed on the surface of the metal plate 6 as shown in FIG. 2 according to the method described in JP-A-7-331479, and this is used as the support member 11. It is preferable that the decorative pattern 3 is formed on the surface of the conductive coating 5 by the electrodeposition image method.
Next, the decorative pattern 3 formed on the surface of the support member 11 is transferred to the application tape 12 having the first ultraviolet curable adhesive layer 7. Specifically, an application tape 12 composed of the base material 8 and the first ultraviolet curable adhesive layer 7 is affixed to the decorative pattern forming surface, and the application tape 12 is peeled off from the support member 11, thereby providing a decorative pattern. 3 is peeled off in a state of being fixed to the first ultraviolet curable adhesive layer 7, and the decorative pattern 3 can be transferred to the application tape 12. When a pressure-sensitive adhesive sheet is used as the support member 11, a material having an adhesive force of the application tape 12 larger than that of the pressure-sensitive adhesive sheet is selected.
[0021]
As shown in FIG. 2, when the conductive film 5 is formed on the surface of the metal plate 6 and the decoration pattern 3 is formed on the surface of the conductive film 5, the decoration pattern 3 is formed as shown in FIG. Is peeled so as to be sandwiched between the conductive film 5 and the application tape 12, and then the conductive film 5 is preferably peeled off from the decorative pattern surface as shown in FIG. By passing through such a process, when transferring the decoration pattern 3 from the support member 11 to the application tape 12, it is possible to prevent an excessive deformation stress from being applied to the decoration pattern 3 or the decoration pattern 3 from being scattered.
[0022]
Here, as the application tape 12 having the ultraviolet curable adhesive layer 7, a so-called UV tape commercially available is used without particular limitation. As the substrate 8, various transparent or translucent resin films are used, and as the ultraviolet curable adhesive, the same ones as described above are used.
[0023]
After the decorative pattern 3 is transferred to the application tape 12 having the first UV curable adhesive layer 7 as described above, the UV light is applied to the first UV curable adhesive layer 7 as shown in FIG. To reduce the adhesive strength. At this time, by irradiating ultraviolet rays from the surface of the substrate 8, the entire first ultraviolet curable adhesive layer 7 is sufficiently cured, and the adhesive force is reduced even at the portion where the decorative pattern 3 is fixed.
[0024]
Next, as shown in FIG. 6, a second ultraviolet curable adhesive layer 4 is further formed on the surface on which the decorative pattern is fixed. The thickness of the second ultraviolet curable adhesive layer 4 is preferably 10 to 60 μm, more preferably 15 to 50 μm, and particularly preferably 15 to 30 μm. The composition of the second ultraviolet curable adhesive layer 4 may be the same as or different from the composition of the first ultraviolet curable adhesive layer 7, but preferably has the same or similar composition.
[0025]
Formation of the second ultraviolet curable adhesive layer 4 is performed, for example, by diluting the above-mentioned adhesive with a solvent, if necessary, and then by silk printing, spraying, or the like, preferably by silk printing.
In forming the second ultraviolet curable adhesive layer 4, a mask having an opening having substantially the same shape as the decorative pattern 3 can be used. That is, the second ultraviolet curable adhesive layer 4 can be formed on the exposed surface of the decorative pattern 3 by aligning the opening of the mask and the decorative pattern 3 and then applying and spraying the adhesive. Further, as described above, the process management pattern 9 can be formed and used as a mask.
[0026]
When the process management pattern 9 is formed as a mask, the pattern 9 is removed after applying and spraying an adhesive.
By passing through such a process, as shown in FIG. 6, the second ultraviolet curable adhesive layer 4 can be formed only on the exposed surface of the decorative pattern 3 and its peripheral portion. It is possible to reduce the protrusion of the adhesive after being applied.
[0027]
On the other hand, separately from the above, an adherend 1 having a recess 2 having substantially the same shape as the decorative pattern 3 is prepared (FIG. 7). The adherend 1 ing of metal and various plastics. The adherend 1 thickness, but varies depending on applications of the decorative plate 10, is generally a 500 to 5000 .mu.m. The formation method of the recessed part 2 is various according to the material of the to-be-adhered body 1, and the method according to a material is selected suitably. For example, press molding or etching may be used, and in the case of a synthetic resin, molding using a mold may be used. The contour shape of the recess 2 is substantially the same as that of the decorative pattern 3. That is, the width and length of the recess 2 are set slightly larger than the decorative pattern 3 . When the concave portion is set to be slightly larger, it is similar to the decorative pattern 3 and is set to a size of 100 to 300 μm with respect to the width and length of the decorative pattern. As described above, the depth of the concave portion 2 is appropriately set in consideration of the thickness of the decorative pattern 3 and the ultraviolet curable adhesive layer 4.
[0028]
Next, alignment of the concave portion 2 of the adherend 1 and the decorative pattern 3 is performed so that the decorative pattern 3 is fixed in the concave portion via the second ultraviolet curable adhesive layer 4. 3 is fitted into the recess through the second ultraviolet curable adhesive layer 4 (FIG. 8). At this time, since the second ultraviolet curable adhesive layer 4 is not irradiated with ultraviolet rays, the decorative pattern 3 can be fixed in the recesses with a sufficient adhesive force.
[0029]
Next, as shown in FIG. 9, ultraviolet irradiation is performed again from the application tape 12 side, that is, from the base material 8 side of the tape 12. At this time, since the second ultraviolet curable adhesive layer 4 positioned on the lower surface of the decorative pattern 3 is concealed by the decorative pattern 3, the ultraviolet rays do not reach and the uncured state is maintained. Can be fixed in the recess with a sufficient adhesive force. On the other hand, the other second ultraviolet curable adhesive layer 4, for example, the adhesive remaining on the periphery of the decorative pattern 3 is polymerized and cured because it is irradiated with ultraviolet rays, and the first ultraviolet curable adhesive layer is used. A cured product integrated with 7 is formed.
[0030]
Finally, when the application tape 12 is peeled from the adherend 1, the cured product of the first ultraviolet curable adhesive layer 7 and the cured product of the second ultraviolet curable adhesive layer 4 are accompanied on the substrate 8. The tape 12 is peeled off. Since the cured product of the second ultraviolet curable adhesive layer 4 has a reduced adhesive force and is integrated with the cured product of the first ultraviolet curable adhesive layer 7, the surface of the adherend 1 and the decorative pattern The cured product of the second ultraviolet curable adhesive layer 4 does not remain in the periphery of 3. As a result, the decorative pattern 3 is fixed through the uncured material (adhesive) of the second ultraviolet curable adhesive layer 4 in the recess of the adherend 1, and the book shown in FIG. A decorative plate 10 according to the invention is obtained.
[0031]
In addition, by performing aging as necessary, the adhesive force of the uncured product (adhesive) of the second ultraviolet curable adhesive layer 4 is further improved, and the decorative pattern 3 is placed in the recess of the adherend 1. Can adhere firmly.
[0032]
【The invention's effect】
According to the present invention, even a minute decorative pattern does not lose an image, and even an image having a sharp edge can prevent abrasion and contact injury, and can effectively utilize the metallic luster inherent in the decorative pattern. A decorative plate and a method of manufacturing the same are provided. Further, according to the present invention, there is provided a decorative plate having an excellent appearance without causing an adhesive for fixing the decorative pattern to protrude from the decorative pattern or remain on the adherend.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of a decorative plate according to the present invention.
FIG. 2 shows an outline of one step of the production method according to the present invention.
FIG. 3 shows an outline of one step of the production method according to the present invention.
FIG. 4 shows an outline of one step of the production method according to the present invention.
FIG. 5 shows an outline of one step of the production method according to the present invention.
FIG. 6 shows an outline of one step of the production method according to the present invention.
FIG. 7 shows an outline of one step of the production method according to the present invention.
FIG. 8 shows an outline of one step of the production method according to the present invention.
FIG. 9 shows an outline of one step of the production method according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Adhering body 2 ... Concave 3 ... Decoration pattern 4 ... Ultraviolet curable adhesive layer (2nd)
5 ... conductive coating 6 ... metal plate 7 ... UV curable adhesive layer (first)
8 ... Base material 9 ... Process management pattern 10 ... Decorative plate 11 ... Support base material 12 ... Application tape

Claims (1)

On the support member, a decorative pattern selected from an electrodeposition image and an etching image and having a thickness of 20 μm to 1000 μm is formed so as to be aligned and temporarily attached.
Transferring the decorative pattern to an application tape having a first UV curable adhesive layer;
Irradiating the first ultraviolet curable adhesive layer with ultraviolet rays to reduce the adhesive force;
Further, a second ultraviolet curable adhesive layer is formed on the surface to which the decorative pattern is adhered,
The total thickness of the decorative pattern and the ultraviolet curable adhesive layer for fixing the decorative pattern having substantially the same shape is 500 to 500 μm in thickness having concave portions in the range of −50 μm to +1000 μm with respect to the depth of the concave portions. A decorative pattern is fitted to the concave portion of the adherend made of a plate-like metal having a thickness of 5000 μm or various synthetic resins via the second ultraviolet curable adhesive layer,
Irradiate ultraviolet rays from the application tape side,
The decorative pattern is covered with an ultraviolet curable adhesive layer that is concealed by the decorative pattern and maintains an uncured state where ultraviolet rays do not reach and has sufficient adhesive strength, and the acute angle portion at the end is the surface of the adherend. Fixed in the recess so as not to protrude from the
A method for producing a decorative plate, comprising peeling off an application tape from a decorative pattern.

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