JP2004223803A - Decorative plate and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a decorative plate which is free from the omission of an image in case it happens to be a microdecorative pattern; prevents itself from being hurt by wear and contact even when an image has a sharp edge; and can effectively use a metallic luster peculiar to the decorative pattern. <P>SOLUTION: This decorative plate is constituted of an adherend with a recessed part and the decorative pattern which is of almost the same shape as the recessed part and fixed inside the recessed part through an ultraviolet-curable adhesive layer. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a decorative plate and a method of manufacturing the same, and more particularly, to a decorative plate which can prevent an image from falling off even if it is a fine decorative pattern and can prevent injuries caused by abrasion and contact even with a sharp edge pattern. It relates to the manufacturing method.
[0002]
[Prior art]
For articles with minute and complicated shapes such as roses and decorative parts for watches, by forming a resist film on the surface of the metal plate other than these image forming parts, A conductive part is formed in accordance with the shape of these images, and a metal is deposited on the conductive part by an electrodeposition method to form an electrodeposited image as a decorative pattern such as a time character, and the decorative pattern is bonded with an adhesive. Once transferred to and held on a supporting substrate such as a film via a layer, a fixing adhesive layer is formed on the exposed surface of the decorative pattern, and while the decorative pattern is peeled off from the supporting substrate, the fixing adhesive is It is widely practiced to adhere to an adherend such as a timepiece display panel via a layer. For example, Patent Literatures 1 and 2 disclose the above-described electrodeposition imaging method and various improvements thereof.
[0003]
Such a decorative pattern is used as a display member (decorative 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 adhered to an adherend via an adhesive layer for fixing, they may fall off due to insufficient adhesive force. was there.
Further, according to the electrodeposition image method, sharp edges are formed at acute angles in the alphabetical letters “V” and “W”. The sharp edges are subject to wear and can catch on the fabric fibers or cause injury.
[0004]
In order to solve such a problem, the present applicant has proposed a decorative plate in Patent Document 3 in which an electrodeposited image is sealed in a hot-melt resin layer. According to this decorative plate, since the electrodeposited image is sealed in the resin, even if it is a minute electrodeposited image, the image does not drop off, and even if the image has a sharp edge, it is injured by wear and contact. Can be prevented. However, since the surface of the electrodeposited image is covered with the resin, the metallic luster inherent in the electrodeposited image is lost.
[0005]
[Patent Document 1]
JP-A-7-331479 [Patent Document 2]
JP-A-8-27597 [Patent Document 3]
Japanese Patent Application Laid-Open No. 2002-205496
[Problems to be solved by the invention]
The present invention provides a decorative plate using a decorative pattern and a method for manufacturing the same, particularly, a fine decorative pattern does not cause an image to fall off, and can prevent abrasion and injury due to contact even with an image having a sharp edge, Another object of the present invention is to provide a decorative plate and a method for manufacturing the same, which can effectively utilize the metallic luster inherent in the decorative pattern.
[0007]
[Means for Solving the Problems]
The decorative plate according to the present invention includes an adherend having a concave portion and a decorative pattern having substantially the same shape as the concave portion, and the decorative pattern is fixed in the concave portion via an ultraviolet-curable adhesive layer. It is characterized by.
In the decorative plate of the present invention, it is preferable that the total thickness of the decorative pattern and the ultraviolet-curable adhesive layer is in a range of −50 μm to +1000 μm with respect to the depth of the concave portion.
[0008]
Further, the decorative pattern may be an electrodeposition image or an etching image.
The method for manufacturing a decorative plate according to the present invention includes:
On the support member, the decorative pattern is formed so as to be aligned and temporarily attached,
Transferring the decorative pattern to an application tape having a first ultraviolet-curable adhesive layer,
Irradiating the first ultraviolet-curable adhesive layer with ultraviolet light to reduce the adhesive strength,
Further forming a second UV-curable adhesive layer on the surface to which the decorative pattern is bonded,
The decorative pattern is fitted to the concave portion of the adherend having the concave portion having substantially the same shape as the decorative pattern via the second ultraviolet-curable adhesive layer,
Irradiate ultraviolet rays from the application tape side,
The application tape is peeled from the decorative pattern.
[0009]
BEST MODE FOR CARRYING OUT 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 concave portion 2 and a decorative pattern 3 having substantially the same shape as the concave portion 2, and the decorative pattern 3 is provided in the concave portion with an ultraviolet curable adhesive. It is fixed via the layer 4.
[0010]
The adherend 1 is made of metal or various synthetic resins, and its material is not particularly limited. Also, 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 described below and the ultraviolet-curable adhesive layer, Generally, it is about 500 to 5000 μm. On the surface of the adherend 1, a concave portion 2 for accommodating a decorative pattern 3 described later is formed. The method of forming the concave portion 2 varies depending on the material of the adherend 1, and a method according to the material is appropriately selected. For example, press molding or etching may be used. In the case of a synthetic resin, molding using a mold may be used. The outline shape of the concave portion 2 is substantially the same as the decorative pattern 3. That is, the width and the length of the concave portion 2 are set to be the same as or slightly larger than the decorative pattern 3. When the concave portion is set slightly larger, the concave portion is similar to the decorative pattern 3 and is set to be larger by about 100 to 300 μm with respect to the width and length of the decorative pattern. 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 as described later.
[0011]
The decorative pattern 3 may be an electrodeposition image manufactured by a known electrodeposition image method described in, for example, JP-A-7-331479, JP-A-8-27597, or the like. Or a fine pattern manufactured 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, a decorative pattern having a character / graphic pattern such as a manufacturer name, a product name, or a trademark is used in many cases. However, the decorative pattern 3 is not limited to these and may be various decorative patterns. Is also good.
[0012]
The thickness of the decorative pattern 3 is preferably 20 to 1000 μm, more preferably 30 to 950 μm, and particularly preferably 30 to 900 μm. The surface of the decorative pattern 3 may be provided with a pattern, or may be colored and finish-plated.
The decorative pattern 3 is fixed in the concave portion of the adherend 1 via an ultraviolet-curable adhesive layer 4. Ultraviolet-curable adhesives have the property of being polymerized and cured by irradiation with ultraviolet light to reduce or eliminate the adhesive force, and various ultraviolet-curable adhesives are known. Generally, the adhesive strength before UV irradiation is 1270 g / 25 mm width or more, and the adhesive strength is drastically reduced by UV irradiation and becomes 30 g / 25 mm width or less.
[0013]
Representative examples of the UV-curable pressure-sensitive adhesive include, but are not limited to, an addition-polymerizable compound having two or more unsaturated bonds, a photopolymerizable compound such as an alkoxysilane having an epoxy group, and carbonyl. Rubber-based pressure-sensitive adhesives containing a photopolymerization initiator such as a compound, an organic sulfur compound, a peroxide, an amine, and an onium salt-based compound, and acrylic pressure-sensitive adhesives (JP-A-60-196965). Reference). The compounding 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, respectively, per 100 parts by weight of the base polymer.
[0014]
In the decorative plate 10 of the present invention, the decorative pattern is fixed in the recess 2 via 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.
Further, 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, and further −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, the decorative pattern 3 is a minute decorative pattern. No image dropout occurs. Also, 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 surface of the adherend. Therefore, even if the image pattern has a sharp edge, it is possible to prevent injuries due to wear and contact. Furthermore, since the decorative pattern surface is exposed, when the decorative pattern is made of metal, the original metallic luster of the metal pattern can be effectively used, and the decorativeness can be improved. However, in the present invention, it is of course allowable to form a resin layer for coloring or the like on the surface of the decorative pattern.
[0016]
Next, a method for manufacturing the decorative plate 10 according to the present invention will be described.
First, the decorative pattern 3 is formed on the support member 11 so as to be aligned and temporarily attached. The production of such a decorative pattern 3 may be performed by applying an electrodeposition imaging method described in, for example, JP-A-7-331479, JP-A-8-27597, or the like. A metal foil is stuck on the pressure-sensitive adhesive sheet using a pressure-sensitive adhesive sheet or the like, and the metal foil is patterned by an etching method, a pressing method, or a laser beam cutting method, so that the decorative pattern 3 temporarily aligned on the pressure-sensitive adhesive sheet 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. Although such a process control pattern 9 is finally removed, it can be used as a mask when forming a second ultraviolet-curable pressure-sensitive adhesive layer 4 described later. The process control pattern 9 may be formed with holes used for alignment or the like.
[0018]
Here, the decorative pattern 3 temporarily aligned and aligned is a state in which the decorative pattern as a whole indicates a character / graphic pattern such as a manufacturer name, a product name, a trademark, and the like, and is fixed on the support member 11 in a peelable manner. State.
As such a decorative pattern 3, an electrodeposited image or an etched image is particularly preferable from the viewpoint of ease of production and the like.
[0019]
The formation of the etching image is performed, for example, by using a pressure-sensitive adhesive sheet or the like as the support member 11, pasting a metal foil on the pressure-sensitive adhesive sheet, forming a resist film on the metal foil, exposing and developing, This is performed by etching and finally removing the resist film. By such a method, an etched image as a decorative pattern is obtained on the adhesive sheet in a state of being aligned and temporarily attached.
[0020]
In addition, in particular, in the present invention, a conductive film 5 is formed on the surface of a metal plate 6 as shown in FIG. Preferably, the decorative pattern 3 is formed on the surface of the conductive film 5 by an 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 adhered to the decorative pattern forming surface, and the application tape 12 is peeled off from the support member 11 to obtain a decorative pattern. The decorative pattern 3 can be transferred to the application tape 12 in a state where the decorative pattern 3 is fixed to the first ultraviolet-curable adhesive layer 7. When a pressure-sensitive adhesive sheet is used as the support member 11, a material having a higher adhesive strength of the application tape 12 than 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, as shown in FIG. Is preferably peeled off so as to be sandwiched between the conductive film 5 and the application tape 12, and then, as shown in FIG. 4, the conductive film 5 is preferably peeled from the decorative pattern surface. Through such a process, when the decorative pattern 3 is transferred from the support member 11 to the application tape 12, it is possible to prevent the decorative pattern 3 from being applied with excessive deformation stress or the decorative pattern 3 from scattering.
[0022]
Here, as the application tape 12 having the UV-curable adhesive layer 7, a commercially available UV tape can be used without any particular limitation. As the substrate 8, various transparent or translucent resin films are used, and as the ultraviolet curable adhesive, the same one as described above is used.
[0023]
After transferring the decorative pattern 3 to the application tape 12 having the first UV-curable adhesive layer 7 as described above, as shown in FIG. To reduce the adhesive strength. At this time, by irradiating ultraviolet rays from the side of the substrate 8, the entire first ultraviolet-curable adhesive layer 7 is sufficiently cured, and the adhesive strength is reduced even in 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 to which the decorative pattern is fixed. The thickness of the second UV-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 UV-curable adhesive layer 4 may be the same or different from the composition of the first UV-curable adhesive layer 7, but preferably has the same or similar composition.
[0025]
The second UV-curable adhesive layer 4 is formed, 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 positioning and aligning the opening of the mask with the decorative pattern 3 and then applying and spraying an adhesive. Further, as described above, the process management pattern 9 can be formed and used as a mask.
[0026]
When the process control pattern 9 as a mask is formed, the pattern 9 is removed after applying and spraying an adhesive.
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, and the adherend 1 can be formed. Extrusion of the adhesive after application can be reduced.
[0027]
On the other hand, separately from the above, the adherend 1 having the concave portion 2 having substantially the same shape as the decorative pattern 3 is prepared (FIG. 7). The adherend 1 is made of metal or various synthetic resins, and its material is not particularly limited. Also, the thickness of the adherend 1 is not particularly limited, and varies depending on the use of the decorative plate 10, but is generally about 500 to 1000 μm. The method of forming the concave portion 2 varies depending on the material of the adherend 1, and a method according to the material is appropriately selected. For example, press molding or etching may be used. In the case of a synthetic resin, molding using a mold may be used. The outline shape of the concave portion 2 is substantially the same as the decorative pattern 3. That is, the width and the length of the concave portion 2 are set to be the same as or slightly larger than the decorative pattern 3. When the concave portion is set slightly larger, the concave portion is similar to the decorative pattern 3 and is set to be larger by about 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, the recess 2 of the adherend 1 is aligned with the decoration pattern 3 so that the decoration pattern 3 is fixed in the recess via the second ultraviolet-curable adhesive layer 4. 3 is fitted into the recess via 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 concave portion 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 located on the lower surface of the decorative pattern 3 is concealed by the decorative pattern 3, the ultraviolet light does not reach and the uncured state is maintained. Can be fixed in the concave portion with a sufficient adhesive force. On the other hand, the other second UV-curable adhesive layer 4, for example, the adhesive remaining on the peripheral portion of the decorative pattern 3, is irradiated with ultraviolet rays and polymerized and cured, and the first UV-curable adhesive layer 7 to form a cured product.
[0030]
Finally, when the application tape 12 is peeled off from the adherend 1, the cured product of the first UV-curable adhesive layer 7 and the cured product of the second UV-curable adhesive layer 4 accompany the base material 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 peripheral portion of the substrate 3. As a result, the decorative pattern 3 is fixed in the concave portion of the adherend 1 via the uncured material (adhesive) of the second ultraviolet-curable adhesive layer 4, and the decorative pattern 3 shown in FIG. A decorative plate 10 according to the invention is obtained.
[0031]
Further, by performing aging as necessary, the adhesive strength of the uncured material (adhesive) of the second ultraviolet-curable adhesive layer 4 is further improved, and the decorative pattern 3 is placed in the concave portion of the adherend 1. Can be firmly bonded.
[0032]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, even if it is a minute decoration pattern, an image will not fall off, and even if it is an image with a sharp edge, it can prevent injuries due to abrasion and contact, and can effectively utilize the metallic luster inherent in the decoration 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 excellent in appearance without an adhesive for fixing the decorative pattern protruding from the decorative pattern or remaining on the adherend.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing one embodiment of a decorative plate according to the present invention.
FIG. 2 shows an outline of one step of the manufacturing 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 manufacturing 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 manufacturing method according to the present invention.
FIG. 7 shows an outline of one step of the manufacturing 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 manufacturing method according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Adherend 2 ... Depressed part 3 ... Decorative pattern 4 ... UV-curable adhesive layer (second)
5 conductive coating 6 metal plate 7 ultraviolet curable adhesive layer (first)
8 Base material 9 Process control pattern 10 Decorative plate 11 Support base material 12 Application tape

Claims (5)

A decorative plate comprising an adherend having a concave portion and a decorative pattern having substantially the same shape as the concave portion, wherein the decorative pattern is fixed in the concave portion via an ultraviolet-curable adhesive layer. 2. The decorative plate according to claim 1, wherein the total thickness of the decorative pattern and the ultraviolet-curable adhesive layer is in a range of −50 μm to +1000 μm with respect to the depth of the recess. 3. The decorative plate according to claim 1, wherein the decorative pattern is an electrodeposition image. The decorative plate according to claim 1, wherein the decorative pattern is an etching image. A decorative pattern is formed on the supporting member so as to be aligned and temporarily attached, and the decorative pattern is transferred to an application tape having a first ultraviolet-curable adhesive layer,
Irradiating the first ultraviolet-curable adhesive layer with ultraviolet light to reduce the adhesive strength,
Further forming a second UV-curable adhesive layer on the surface to which the decorative pattern is bonded,
The decorative pattern is fitted to the concave portion of the adherend having the concave portion having substantially the same shape as the decorative pattern via the second ultraviolet-curable adhesive layer,
Irradiate ultraviolet rays from the application tape side,
A method for manufacturing a decorative plate, comprising separating an application tape from a decorative pattern.

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