JP2003215268A - Dial for clock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dial for clocks for preventing the tint of an image from being deformed when being exposed to ultraviolet rays and for maintaining a clear image for a long time. <P>SOLUTION: In a dial 10 for clocks where a metal film is formed on the surface of a dial substrate 11, a transparent reception layer 12 is formed on the upper surface of the metal film, a transfer paper where images are printed and formed by a sublimation dying ink is overlapped onto the reception layer 12, and the images of the transfer paper are transferred to the reception layer 12 under heating and pressurization for forming a transfer image 4. In the dial 10 for clocks, the reception layer 12 contains an ultraviolet absorbent for indicating a chemical expression 1 by a 10 pts.wt. at a binder 100 pts.wt. of a transparent polyurethane resin or the like. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a watch for forming a transfer image by heating and pressurizing a transfer paper image-printed with a sublimable dye ink on a receiving layer on the upper surface of a timepiece dial substrate. Regarding the dial.

[0002]

2. Description of the Related Art Conventionally, paintings using sublimable dye ink,
Images such as photographic images, text images, and pattern images are printed on transfer paper, and the images printed on this transfer paper are transferred to a receiving layer formed on the surface of a metal plate or glass plate under heat and pressure. Then, a transfer image is formed on a metal plate, a glass plate, or the like.

FIG. 4 is a diagram for explaining a transfer method. FIG. 4 (a) is a sectional view for explaining a state before transfer and FIG. 4 (b) is a sectional view for explaining a state after transfer. In FIG. 4, the transfer paper 1 on which the image 1a is formed by printing with the sublimable dye ink is superposed on the transfer target 2 on which the receiving layer 2b is formed with the image 1a being the lower surface side, and heated under heating. The image 1a is transferred to the receiving layer 2b of the transferred object 2 by applying pressure by the pressure device 3.

The transferred material 2 includes a substrate 2a and a receiving layer 2b.
The base 2a is made of various materials such as metal, plastic, fiber and glass. Receptive layer 2
Polyurethane resin, polyester resin, or the like is selected for b, and is formed by a printing method, a coating method, or the like.

When the transfer paper 1 on which an image is formed is superposed on the transferred material 2 constituted as described above and is pressed under heating,
The sublimable dye vaporizes, and the vaporized dye permeates and enters the receiving layer 2b, the same image (correctly opposite image) is drawn in the receiving layer 2b, and a transfer image is formed.

The transferred image formed in this manner gives a clear image in the initial stage, but if it is used for a long time while being exposed to the external light for a long period of time or when the external temperature fluctuates,
There is a problem that the color of the image changes or the color becomes faint and the image becomes unclear. This is because the sublimable dye is vulnerable to ultraviolet rays and is easily deteriorated by ultraviolet rays.
Therefore, in order to prevent deterioration of the sublimable dye, an ultraviolet absorber is mixed in the receiving layer 2b, or a protective film containing the ultraviolet absorber is provided on the upper surface of the receiving layer 2b.

FIG. 5 is a sectional view showing a timepiece dial made by this conventional technique. In FIG. 5, a timepiece dial 40 is a dial board 11 having a small hole 11a for attaching a pointer provided at the center thereof and two feet 11b for attaching a watch movement on the back surface, and the dial board 11 Receiving layer 12 having transfer image 4 formed on the upper surface of
It is composed of an hour character 13 which is adhered and fixed to a part of the upper part of 2.

The receiving layer 12 is made of a transparent polyurethane resin containing a UV absorber of 2- (3,5-di-t-butyl-2-hydroxyphenyl) benzotriazole dispersed therein, and the thickness thereof is about 20 μm. It is applied or printed. Then, the transfer image 4 is formed on the receiving layer 12 by transferring the image from the transfer paper on which the print image is formed with the sublimable dye ink under heat and pressure.

On the other hand, the dial plate of a portable timepiece is constantly worn on the arm and used while being exposed to ultraviolet rays every day. For this reason, it is required to sufficiently ensure the light resistance against ultraviolet rays and the like.

[0010]

However, as described above, benzotriazole is generally used as a conventional ultraviolet absorber, and this benzotriazole is used very much. These UV absorbers are simply used by being mixed in the resin, and because they easily flow to the surface due to temperature changes and the like, and have a relatively low melting point (up to 150 to 160 degrees), When it is used in a material to which high heating is applied, there are problems such as quick scattering and short light resistance. Therefore, there is a problem that deterioration is apt to proceed even in an image transfer operation where the heating temperature is around 180 degrees, and the material cannot be used as an injection molding material where the heating temperature exceeds 200 degrees.

(Purpose) The present invention has been made in view of the above-mentioned conventional problems, and forms a very vivid transferred image by using a sublimable dye, and has a rich appearance and sufficient light resistance. An object is to provide a timepiece dial having the same.

[0012]

In order to achieve the above object, a timepiece dial according to claim 1 of the present invention has a transparent receiving layer formed on an upper surface of a dial substrate, and the transparent receiving layer is formed on the receiving layer. In a dial for a watch formed by superimposing a transfer paper on which an image is formed by printing a sublimable dye ink and transferring the image on the transfer paper to the receiving layer under heat and pressure, the receiving layer is ,
100 parts by weight of transparent resin binder, chemical formula

[Chemical 1] Is contained in an amount of 1 to 20 parts by weight.

Further, the timepiece dial according to the invention of claim 2 is a transfer paper in which a transparent receiving layer is formed on the upper surface of the dial substrate and an image is formed by printing a sublimable dye ink on the receiving layer. In a dial for a watch formed by transferring an image of a transfer paper to the receiving layer under heat and pressure, and 100 parts by weight of a transparent resin binder on the upper surface of the receiving layer. Chemical formula

[Chemical 1] Is laminated with a protective film containing 1 to 20 parts by weight of an ultraviolet absorber.

Further, the timepiece dial according to the invention of claim 3 is a transfer paper in which a transparent receiving layer is formed on the upper surface of the dial substrate and an image is formed by printing a sublimable dye ink on the receiving layer. In a dial for a watch formed by transferring an image of a transfer paper to the receiving layer under heat and pressure, the receiving layer being 100 parts by weight of a transparent resin binder,
Chemical formula

[Chemical 1] Of 1 to 20 parts by weight of an ultraviolet absorber, and 100 parts by weight of a transparent resin binder on the upper surface of the receiving layer has the chemical formula

[Chemical 1] Is laminated with a protective film containing 1 to 20 parts by weight of an ultraviolet absorber.

In the timepiece dial according to the invention of claim 4, the transparent resin is at least one of polyurethane resin, polyester resin, epoxy resin and acrylic resin.
It is characterized by consisting of two.

The timepiece dial according to the invention of claim 5 is characterized in that the receiving layer has a thickness of approximately 10 to 80 μm.

The timepiece dial according to the invention of claim 6 is characterized in that the surface of the receiving layer is formed into a smooth polished surface.

The timepiece dial according to the invention of claim 7 is characterized in that the thickness of the protective film is approximately 10 to 30 μm.

The timepiece dial according to the invention of claim 8 is characterized in that the surface of the protective film is formed into a smooth polished surface.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) A timepiece dial according to the present invention will be described below with reference to the drawings.
FIG. 1 is a sectional view of a timepiece dial according to a first embodiment of the present invention. The same parts as those in the conventional example are given the same numbers.

In FIG. 1, a timepiece dial 10 has a dial 11 having a small hole 11a for attaching a pointer at its center and two feet 11b for attaching a timepiece on the back surface. The receiving layer 12 having the transfer image 4 formed on the upper surface of the dial plate 11 and the hour character 13 adhered and fixed to a part of the receiving layer 12. The dial board 11 is formed by plating a metal board made of aluminum, brass, nickel silver or the like to form a metal film.

Further, the receiving layer 12 is formed by adding 100 parts by weight of a transparent polyurethane resin to a chemical formula.

[Chemical 1] 10 parts by weight of an ultraviolet absorber having the formula (1) is dispersed and mixed to form a print, and then a smooth surface is finished by lapping with a thickness of 50 μm.

The transfer image 4 is formed on the smooth receiving layer 12. The method of forming the transfer image 4 is as follows.
A yellow, green, and black sublimation dye ink is used to print a color image on a transfer paper with an inkjet printer. Then, the transfer paper on which the color image is formed is placed on the receiving layer 12 formed on the dial board 11,
The color image on the transfer paper is applied to the receiving layer 1 by pressing for about 60 seconds under a heating temperature of 180 ° C. and a pressure of 10 to 20 g / cm ^2.
2 is transferred to form a transfer image 4.

In the result of the sunshine weather meter test for 100 hours in the wet state of the timepiece dial 10 having the above structure, no fading was observed in the transferred image 4, and very good light resistance was obtained.

Chemical formula dispersed and blended in the receiving layer 12 of the present embodiment

[Chemical 1] The ultraviolet absorber having 2 has two benzotriazole rings and two hydroxyethyl groups. This hydroxyethyl group reacts with the resin of the receiving layer 12 to form a copolymer. Further, since the benzotriazole ring exhibiting an ultraviolet absorbing function is incorporated into this polymer, transpiration due to temperature change is reduced, and the weather resistance effect is maintained for a long period of time. Further, the ultraviolet absorber has a very high melting point of 240 ° C. and a decomposition point of 420 ° C. Therefore, 1
It can be used without being affected by a transfer temperature close to 80 ° C.

The amount of the ultraviolet absorber blended must be set in consideration of the light resistance performance and the curing reaction condition of the resin. If the compounding amount is small, the light resistance becomes poor, and conversely, if the compounding amount is large, the light resistance becomes very good, but the curing reaction of the resin becomes slow,
The coating does not harden. As a result of various experiments, the content of the ultraviolet absorber is preferably 1 to 20% by weight, and most preferably 5 to 10% by weight.

A two-component polyurethane resin was used as the binder of the receiving layer 12, but the binder is not limited to this, and resins such as polyester resin, epoxy resin and acrylic resin can be selected.

Further, the thickness of the receiving layer 12 influences the penetration depth of the sublimable dye and is a very important control factor. If the thickness is shallow, the dye will come out due to temperature changes and the image will fade. From the experimental results, it was found that the thickness of the receiving layer 12 is preferably 10 μm or more. The thicker layer is not particularly limited, but conventionally, the thicker the layer, the deeper the dye can penetrate. The deeper the layer, the more the dye can be prevented from coming out. It was formed and penetrated deeply into the dye to enhance weather resistance.

However, the ultraviolet absorbent used in the present embodiment has excellent weather resistance even when the receptor layer 12 is thin and the dye penetrates shallowly. Then, as a result of various experiments on the thickness of the receiving layer, it was confirmed that the thicker one is sufficient if the thickness is 80 μm.
Therefore, the receiving layer 12 preferably has a thickness in the range of approximately 10 to 80 μm.

Further, since the surface of the receiving layer 12 is a polished and glossy smooth surface, the transfer is performed under a uniform pressing force on the entire surface, so that the transferred image does not have color unevenness. A beautiful transferred image can be obtained.

As described above, according to this embodiment, by dispersing the ultraviolet absorber in the receiving layer 12 formed on the dial plate substrate 11, a very vivid transferred image formed of a sublimable dye can be obtained. It is possible to obtain the timepiece dial 10 which is excellent in light resistance and does not fade.

Further, the ultraviolet absorbent of the present embodiment causes little transpiration due to temperature changes and the like, and the weather resistance effect can be maintained for a long period of time. Further, since the thickness of the receiving layer is thin and excellent weather resistance can be obtained even with shallow penetration of dye, the printing cost of the receiving layer can be reduced and the image transfer time can be shortened. Furthermore, since the above-mentioned ultraviolet absorber has a high decomposition point of 420 ° C., it can be used without being affected by a transfer temperature close to 180 °.

(Second Embodiment) Next, a second embodiment of the timepiece dial according to the present invention will be described. Figure 2
[Fig. 6] is a sectional view of a timepiece dial according to a second embodiment. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. In FIG. 2, the timepiece dial 20 includes a dial plate substrate 11 made of a brass plate, a receiving layer 22 provided on the upper surface of the dial plate substrate 11 on which the transfer image 4 is formed, and further,
Protective film 23 containing ultraviolet absorber formed thereon
And a time character 13 adhered and fixed to a part of the protective film 23.

The protective film 23 has a chemical formula based on 100 parts by weight of a transparent polyurethane resin.

[Chemical 1] 10 parts by weight of an ultraviolet absorber having the formula (1) is mixed and formed into a paint, which is formed by a printing method or a coating method, and the upper surface is lapped to a thickness of about 20 μm.
Since the ultraviolet absorbent is the same as that in the first embodiment, the description is omitted.

The receiving layer 22 here is formed of a polyurethane resin coating by a printing method to a thickness of about 20 μm, and the surface thereof is made into a glossy smooth surface by polishing.

As a result of the sunshine weather meter test for 100 hours in the wet state of the timepiece dial 20 having the above-mentioned structure, no alteration was observed in the transferred image 4, and a lightproof watch dial was obtained. It was

The protective film 23 in this embodiment has a thickness of about 20 μm.
Although it was applied to a thickness of m, it is preferable to set the thickness to at least 10 μm or more because light resistance deteriorates if it is thin, and it has been confirmed by experiments that a thickness of 30 μm even at a thickness gives a color tone comparable to the image tone. There is. From this, it can be said that the thickness of the protective film 23 is preferably in the range of approximately 10 to 30 μm.

As described above, according to this embodiment,
Protective film 2 containing the ultraviolet absorber on the receiving layer 22
By stacking 3 layers, the transferred image 4 was not deteriorated for a long period of time, and the timepiece dial 20 having excellent light resistance was obtained as in the first embodiment.

(Third Embodiment) Next, a third embodiment of the timepiece dial according to the invention will be described. Figure 3
[FIG. 7] is a cross-sectional view of a timepiece dial according to a third embodiment. The same parts as those in the first and second embodiments are given the same reference numerals and the description thereof will be omitted. In FIG. 3, a timepiece dial 30 includes a dial plate substrate 11 made of a brass plate,
Receptor layer 1 provided on the upper surface side and having transferred image 4 formed thereon
2 and the protective film 2 provided on the upper surface of the receiving layer 12 in a laminated manner.
3 and the upper surface thereof is polished into a smooth surface to provide the hour character 13.

The receiving layer 12 is the same as that in the first embodiment, and the protective film 23 is the same as that in the second embodiment.

When the timepiece dial 30 having the above-mentioned structure was subjected to a sunshine weather meter test for 200 hours in a wet state, no deterioration of the image was observed and very good light resistance performance was obtained.

As described above, according to this embodiment,
By overlaying the protective film 23 containing the ultraviolet absorber on the receiving layer 12 containing the ultraviolet absorber,
Compared with the timepiece dials 10 and 20 of the first and second embodiments, the transferred image 4 does not deteriorate for a longer period of time, and the timepiece dial 30 having higher light resistance is obtained. Was given.

[0043]

As described above, according to the present invention, an ultraviolet absorber having a benzotriazole ring and a hydroxyethyl group is dispersed in a receiving layer formed on a dial substrate, whereby the sublimable dye is added to the receiving layer. The extremely bright transferred image formed in 1. does not fade, and a timepiece dial having excellent light resistance can be obtained.

Further, by laminating the protective film in which the ultraviolet absorber is dispersed on the receiving layer, the transferred image formed on the receiving layer is not deteriorated for a long period of time and excellent in light resistance as in the above. A dial for watches is obtained.

Further, the ultraviolet absorbent is dispersed in the receiving layer,
Further, by overlaying a protective film having the ultraviolet absorber dispersed thereon, a timepiece dial having a higher light resistance effect can be obtained.

Further, since the surface of the receptive layer is a polished smooth surface with gloss, the entire surface is uniformly transferred under pressure, so that the transferred image is free from color unevenness and is beautiful. A timepiece dial having a transferred image is obtained.

Further, as described above, the ultraviolet absorber in the present invention has a benzotriazole ring and a hydroxyethyl group, and the hydroxyethyl group reacts with the resin of the receiving layer to form a copolymer, Incorporates a benzotriazole ring that exerts an ultraviolet absorbing function into, so there is less evaporation of the ultraviolet absorber due to temperature changes,
The weather resistance effect can be maintained for a long time.

Further, the ultraviolet absorber has a decomposition point of 42.
Since it is as high as 0 ° C., it can be used without being affected by a transfer temperature close to 180 degrees. It can also be used by mixing it with the material of injection molding.

Further, according to the timepiece dial of the present invention, since the thickness of the receiving layer is thin and excellent weather resistance can be obtained even with shallow penetration of the dye, the printing cost of the receiving layer can be reduced. I can. Further, the image transfer time can be shortened, the manufacturing turn can be shortened, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a timepiece dial according to a first embodiment of the invention.

FIG. 2 is a sectional view of a timepiece dial according to a second embodiment of the invention.

FIG. 3 is a sectional view of a timepiece dial according to a third embodiment of the invention.

FIG. 4 is a cross-sectional view illustrating a transfer state in which an image is transferred to a receiving layer of a transfer target according to the related art, in which FIG. 4 (a) is a state before transfer and FIG. 4 (b) is a state after transfer.

FIG. 5 is a sectional view of a conventional timepiece dial.

[Explanation of symbols]

1 transfer paper 1a image 2 Transfer target 2a base 2b Receptive layer 3 Pressurizing device 4 Transfer image 10 Clock dial 11 dial board 11a metal film 11b feet 12 Receptive layer 13 o'clock 20 clock dial 22 Receptive layer 23 Protective film 30 clock face 40 clock face

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Katsuyuki Yamaguchi             6-12 Tanashi-cho, Nishi-Tokyo, Tokyo             Chisun Watch Co., Ltd.

Claims (8)

[Claims] 1. A transparent receptive layer is formed on the upper surface of a dial board, and a transfer paper on which an image is printed with a sublimable dye ink is superposed on the receptive layer, and the receptive layer is heated and pressed under heat and pressure. In a timepiece dial formed by transferring an image on a transfer paper to the receiving layer, the receiving layer is formed by adding 100 parts by weight of a transparent resin binder to a chemical formula: 1 to 20 parts by weight of an ultraviolet absorber showing the above. 2. A transparent receptive layer is formed on the upper surface of a dial plate substrate, and a transfer paper on which an image is printed with a sublimable dye ink is superposed on the receptive layer, and the receptive layer is heated and pressed under heat and pressure. A timepiece dial formed by transferring an image on a transfer paper to the receiving layer, wherein 100 parts by weight of a transparent resin binder is added to the upper surface of the receiving layer, and the chemical formula: And a protective film containing 1 to 20 parts by weight of the ultraviolet absorber shown in FIG. 3. A transparent receptive layer is formed on the upper surface of a dial board, and a transfer paper on which an image is printed with a sublimable dye ink is superposed on the receptive layer, and the receptive layer is heated and pressed. In a timepiece dial formed by transferring an image on a transfer paper to the receiving layer, the receiving layer is formed by adding 100 parts by weight of a transparent resin binder to a chemical formula: Of 1 to 20 parts by weight of an ultraviolet absorber, and 100 parts by weight of a transparent resin binder on the upper surface of the receiving layer, a chemical formula: And a protective film containing 1 to 20 parts by weight of the ultraviolet absorber shown in FIG. 4. The timepiece according to claim 1, wherein the transparent resin is at least one of polyurethane resin, polyester resin, epoxy resin and acrylic resin. Dial. 5. The timepiece dial according to any one of claims 1 to 3, wherein the thickness of the receiving layer is approximately 10 to 80 μm. 6. The timepiece dial according to any one of claims 1, 2, 3, and 5, wherein the surface of the receiving layer is formed into a smooth polished surface. 7. The timepiece dial according to claim 2, wherein the protective film has a thickness of approximately 10 to 30 μm. 8. The timepiece dial according to claim 2, wherein the surface of the protective film is formed as a smooth polished surface.