JP4964276B2 - Decorative body and method of manufacturing the decorative body - Google Patents

Description

The present invention relates to a decorative body and a method for manufacturing the decorative body .

  For example, various products such as automobile bodies are often improved in decorativeness by attaching and fixing decorative bodies such as marks and medallions to the surface thereof. In the following Patent Document 1, an example of a decorative body that realizes multicoloring and simplification of a manufacturing process is disclosed.

Japanese Patent Application Laid-Open No. 5-200964

  However, in the decorative body of the above-mentioned document, improvement of aesthetics is considered as a problem, and therefore, attention is not paid to the problem of resistance to scratches and peeling due to external contact with the decorative body. For example, if the thickness of the colored layer is increased, the resistance can be improved.

  As is well known, there are various printing methods. For example, in the case of gravure printing, the ink film thickness can only be increased to about 1 μm. On the other hand, it is known that the film thickness of ink can be increased to about 5 μm or more in screen printing and offset printing. However, the surface of the decorative body is not always flat and includes various curved surfaces. For example, when screen printing is performed on a curved surface, ink is attached only to a portion near the tangential plane of the curved surface.

  Therefore, when trying to increase the thickness of the ink, it is difficult to avoid the influence of an increase in the printing process, an increase in defect probability, and an increase in cost. Therefore, when increasing the thickness of the colored layer, it is necessary to consider the solution of such a problem. However, in the prior art including the above-mentioned document 1, it is recognized as a problem to solve this problem in the manufacture of a decorative body. Not.

  Further, in the decorative body of Document 1, a four-layer structure including a colored layer and a protective layer is formed on a base material, which is not necessarily a simple structure and may be further simplified. For example, if the thickness of the colored layer is increased, there is a low possibility that the ink will be peeled off at a slight contact level, so there is a possibility that the formation of the protective layer can be eliminated.

  In addition, there is a type of decorative body that is colored on the back side of the transparent decorative body so that it can be viewed from the front side. Since there is virtually no possibility of contact, the need for a protective layer is further reduced. Such a point is not considered in the conventional literature.

  Therefore, in view of the above problems, the problem to be solved by the present invention is to improve resistance to scratches and peeling due to contact from the outside without reducing decorativeness, simplifying the manufacturing process and reducing cost. It is to provide a decorative body that realizes the above.

Means for Solving the Problems and Effects of the Invention

In order to achieve the above object, a decorative body according to the present invention is a base that is fixed to a part of an article, is formed of a transparent material, and has a concave curved surface on a back surface that is a surface that contacts the article. The ink is transferred from the transfer sheet on which the ink has been printed by thermal transfer so that the transparent material can be seen through the transparent material from the material and the surface of the substrate that does not contact the article. And a colored layer colored on the concave curved surface on the back surface, formed by being transferred to the concave curved surface on the back surface of the substrate, and the film thickness of the ink in the colored layer is the ink thickness to the transfer sheet In printing , it is a film thickness formed by either screen printing or offset printing , and is greater than or equal to a film thickness that can be obtained by gravure printing , and the coloring is formed on the colored layer formed on the substrate. Protect layer Protective layer is characterized by not formed.

  Thus, in the decorative body of the present invention, the colored layer formed on the base material is formed by thermal transfer from a transfer sheet printed with a film thickness larger than gravure printing by screen printing or offset printing. As a result, in the case of gravure printing or the like, the ink layer is thin, so that the colored layer may be scratched by light contact and the decorativeness may be impaired. In contrast, in the present invention, screen printing or offset printing and thermal transfer are performed. A thick film thickness was realized by adopting the combination. Therefore, it is possible to realize a decorative body that improves resistance to scratches and peeling due to external contact while maintaining high decorativeness. Furthermore, since printing on a flat transfer sheet is used, it does not matter whether or not the outer surface of the substrate has a curved surface in the printing process. Cost reduction can be realized.

  In addition, the base material is formed of a transparent material, and the colored layer is applied to the article so that the transparent material can be seen through the transparent material from the surface side that is not in contact with the article. A protective layer that protects the colored layer may not be formed on the colored layer that is formed on the back surface that is in contact with the substrate and is formed on the substrate.

  Thereby, the colored layer formed on the back surface of the base material made of a transparent material is formed by thermal transfer from a transfer sheet printed with a film thickness thicker than gravure printing by screen printing or offset printing, and on the colored layer. The protective layer was not formed. As a result, in the present invention, a combination of screen printing, offset printing, and thermal transfer is used to achieve a thick film thickness and transfer to the back surface, so that the decorativeness can be maintained without a protective layer. Therefore, it is possible to realize a decorative body that achieves simplification of the manufacturing process and cost reduction while maintaining high decorativeness.

  The ink printed on the transfer sheet has a plurality of colors, and the colored layer is formed on the base material while the transfer sheet is bent by thermal transfer from a flexible flat transfer sheet on which the ink is printed. The ink may be formed by being transferred to the outer surface while being pressed to the outer surface and deformed to the shape of the outer surface.

  As a result, even if the design is multi-colored, it is printed on the transfer sheet with multiple colors by screen printing or offset printing, and then thermally transferred to the substrate. A decorative body that achieves high durability, simplification of the manufacturing process, and cost reduction while maintaining high decorativeness by the thickening technique can be realized. Furthermore, by giving flexibility to the transfer sheet, even when the back surface of the base material has a curved surface shape, thermal transfer with high accuracy is possible.

  The thickness of the ink printed on the transfer sheet may be 5 μm or more.

  As a result, the film thickness of the ink is printed on the transfer sheet with a thickness of 5 μm or more, and then thermally transferred to the base material. Therefore, the sufficient film thickness of 5 μm or more ensures improved resistance to scratches and peeling due to contact. To do. Therefore, it is possible to realize a decorative body that achieves high durability, simplification of the manufacturing process, and cost reduction while maintaining high decorativeness.

The figure which shows the decoration body of Example 1 of this invention. FIG. 3 is a diagram showing a transfer sheet of Example 1. FIG. 3 is a diagram illustrating thermal transfer according to the first embodiment. 3 is a flowchart showing a procedure for manufacturing a decorative body according to the first embodiment. The figure which shows the decoration body of Example 2. FIG. FIG. 6 is a diagram showing a transfer sheet of Example 2. FIG. 6 is a diagram illustrating thermal transfer according to the second embodiment. 9 is a flowchart showing a procedure for manufacturing a decorative body of Example 2. 10 is a flowchart showing another manufacturing procedure of the decorative body of Example 2.

  Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram illustrating an example of a decorative body 1 according to the first embodiment. Fig.1 (a) is a front view of the decoration body 1, FIG.1 (b) is XX sectional drawing of (a).

  As shown in this figure, the decorative body 1 includes an elliptical plate-shaped substrate 10 that is curved and bulged on the surface side. The outer surface of the substrate 10 includes two main surfaces, a front surface 1a and a back surface 1b. A pattern is formed on the back surface 1 b of the substrate 10 by the colored layers 11, 12, 13, 14 (or colored regions), and the other portions are non-colored regions 15.

  The colored layers 11, 12, 13, and 14 are ink (paint) layers (or films) formed on the surface of the substrate 10. In the decorative body 1 of FIG. 1, the colored layers 11, 12, and 13 form the same concave curved surface. And the non-colored area | region 15 is a recessed part further intruded rather than the colored areas 11, 12, 13, and 14. FIG.

  The material of the base material 10 may be a transparent material. More specifically, the material is made of a transparent resin. For example, polymethyl methacrylate (PMMA), polycarbonate (PC), polystyrene (PS), acrylonitrile styrene copolymer (AS), polyethylene terephthalate (PET), acrylonitrile butadiene styrene A polymer (ABS) or the like may be used. Alternatively, it may be made of glass. The substrate 10 may be colorless and transparent or colored and transparent. Since the base material 10 is transparent, as shown in FIG. 1A, the colored layers 11, 12, 13, and 14 formed on the back surface 1b side are visually recognized when viewed from the front surface 1a side. The

  The colored layers 11, 12, 13, and 14 of the decorative body 1 are formed by thermal transfer. The transfer sheet 2 used for it is shown in FIG. 2A is a perspective view of the transfer sheet 2, and FIG. 2B is a YY sectional view thereof. In the transfer sheet 2, a colored layer 21 is formed on a flat sheet (or film) 20, and an adhesive layer 22 (or adhesive material layer) is further formed thereon.

  The colored layer 21 and the adhesive layer 22 are formed in the same shape as the colored layers 11, 12, 13, and 14 in FIG. The sheet 20 may be a resin film having stretchability or flexibility, for example, a polyethylene film, a polyester film, a polycarbonate film, a polyimide film, or the like.

  The colored layer 21 is formed by printing on the sheet 20 by screen printing. At that time, it is a point of the present invention to print the ink thickly. Thereby, the thickness of the colored layers 11, 12, 13, and 14 transferred to the back surface 1b in the finished decorative body 1 is increased. The thickness of the film should be such that a slight contact does not cause scratches that expose the lining. Usually, a protective layer for protecting the ink is formed on the colored layer, but it may be formed on the back surface 1b. If the film thickness is sufficiently thick, the ink is protected from above the colored layers 11, 12, 13, and 14. There is no need to coat a protective layer. Therefore, simplification of work processes and cost reduction can be realized.

  Specifically, the film thickness of the ink may be, for example, a film thickness that is thicker than the film pressure (about 1 μm) that can be obtained by normal gravure printing and that can be achieved by screen printing, for example, 5 μm or more.

  The screen printing method may be a known method. That is, a screen on which a printing pattern is formed is placed on a horizontally placed sheet 20, and paste ink is placed on the screen. Then, the paste is pressed against the sheet 20 while being stretched by a squeegee on the screen. As a result, ink is applied (printed) on the sheet 20 only within the area of the print pattern.

  When forming the colored layer 21 as a pattern of a plurality of colors, the screen is replaced for each color and screen printing is repeated for the number of colors. When using a plurality of colors in the example of FIG. 1, the colored layers 11, 12, 13, and 14 are further divided into regions for each color. A plurality of screens having a print pattern for each color print area is used. The adhesive layer 22 is formed by printing on the same region as the colored layer 21 further on the colored layer 21 by screen printing.

  Note that since the ink film thickness can be increased as described above even in offset printing, screen printing may be changed to offset printing as described above. Note that a known ink may be used, for example, an acrylic ink, a polycarbonate ink, a polypropylene ink, or the like may be used.

  FIG. 3 shows the state of thermal transfer (hot stamp). In the thermal transfer step, the base material 10 is first fixed to the jig 4, and the transfer sheet 2 is fixed to the holder 40 so that the colored layer 21 and the adhesive layer 22 face the back surface 1 b of the base material 10. . In that case, it positions so that the position of the colored layer 21 may come to the desired position of the back surface 1b of the base material 10. FIG.

  Next, electric power is supplied from an electric power source (not shown) to the pressing pad 3 arranged in the upper part of the figure to raise the temperature. Then, the press pad 3 whose temperature has been sufficiently raised is moved up and down by a moving mechanism (not shown), and the transfer sheet 2 is pressed against the back surface 1b of the base material 10 from above. As a result, the adhesive layer 22 is heated and pressure-bonded and adhered to the back surface 1b, whereby the colored layer 21 moves from the transfer sheet 2 side to the substrate 10 side. In this way, the colored layer 21 and the adhesive layer 22 are thermally transferred to the back surface 1 b of the substrate 10.

  At that time, the elasticity of the transfer sheet 2 or the flexibility is utilized, and the curvature of the pressing surface of the pressing pad 3 is set to be larger than the curvature of the back surface 1b of the substrate 10, so that the concave portion of the curved back surface 1b The transfer sheet 2 can be pressed in a region other than 15 without a gap. Therefore, highly accurate thermal transfer can be performed on the curved back surface 1b.

  FIG. 4 shows a manufacturing process of the decorative body 1 including thermal transfer. In this step, the base material 10 is first formed in step S10. Specifically, for example, injection molding may be performed. What is necessary is just to shape | mold by mixing a pigment, when making the base material 10 colored and transparent.

  Next, a design is printed on the sheet 20 in S20. That is, as shown in FIG. 2, the colored layer 21 is formed on the sheet 20 by screen printing or offset printing. Next, the adhesive layer 22 is printed on the sheet 20 in S30. That is, as shown in FIG. 2, the adhesive layer 22 is formed on the colored layer 21 by screen printing or offset printing. Finally, in S40, the colored layer 21 and the adhesive layer 22 are thermally transferred to the substrate 10 as shown in FIG. In FIG. 1, the adhesive layer 22 may be omitted.

  The decorative body 1 is created by the above procedure. The completed decorative body 1 is mounted, fixed, and abutted on the back surface 1b side of various products such as a car body. The colored layers 11, 12, 13, and 14 on the back surface 1b side are perceived by the user through the transparent base material 10. This improves the decorativeness of the product.

  In the manufacturing procedure of FIG. 4, there is no step of providing a protective layer after thermal transfer to the substrate 10 as described above. Therefore, simplification of the process and cost reduction can be realized. As described above, the colored layers 11, 12, 13, and 14 are formed thick so that the possibility of exposing the lining due to contact scratches is low, and the back surface 1b is the side that receives contact after mounting on the product. Therefore, even if there is no protective layer, it is unlikely that the colored layers 11, 12, 13, 14 are damaged and the decorativeness is lowered.

  Next, Example 2 will be described. In Example 2, while the colored layer was formed on the back surface 1b of the decorative body 1 in Example 1, the colored layer is formed on the surface of the decorative body. FIG. 5 shows a decorative body 1 ′ according to the second embodiment. FIG. 5A is a front view of the decorative body 1 ′, and FIG. 5B is a ZZ sectional view of FIG.

  The decorative body 1 ′ includes an elliptical base plate 10 ′ that is curved and bulged on the surface side. The outer surface of the substrate 10 ′ includes two main surfaces, a front surface 1 a ′ and a back surface 1 b ′. On the surface 1a 'of the substrate 10', a pattern is formed by colored layers 11 ', 12', 13 ', 14' (or colored regions), and the other portions are non-colored regions 15 '.

  The colored layers 11 ′, 12 ′, 13 ′, and 14 ′ are ink (or paint) layers (or films) formed on the surface of the substrate 10 ′. In the decorative body 1 ′, the colored layers 11 ′, 12 ′, 13 ′, and 14 ′ form the same convex curved surface. The material of the base material 10 ′ may be the same as that of the base material 10. However, the substrate 10 'may be a transparent material or an opaque material.

  The colored layers 11 ′, 12 ′, 13 ′, and 14 ′ of the decorative body 1 ′ are formed by thermal transfer. FIG. 6 shows a transfer sheet 2 'used therefor. FIG. 6A is a perspective view of the transfer sheet 2 ′, and FIG. 6B is a WW sectional view thereof. In the transfer sheet 2 ′, a protective layer 23 is formed on a flat sheet (or film) 20 ′, and a colored layer 21 ′ and an adhesive layer 22 ′ (or an adhesive layer) are further formed thereon.

  The material of the protective layer 23 may be, for example, a colorless transparent ink containing a polymer and having a film forming performance. In FIG. 6, the region where the protective layer 23 is formed is a region that covers the entire surface 1 a ′ of the base material 10 ′, but is not limited thereto, and is a region of the colored layers 11 ′, 12 ′, 13 ′, and 14 ′. If it is formed so as to cover, the ink protection function is achieved.

  The colored layer 21 ′ and the adhesive layer 22 ′ are formed in the same shape as the colored layers 11 ′, 12 ′, 13 ′, and 14 ′ in FIG. 1. The material of the sheet 20 ′ may be the same as that of the sheet 20. The protective layer 23 in FIG. 6 is thermally transferred to the base material 10 ′ to form the protective layer 16 in FIG. 5. The colored layer 21 ′ in FIG. 6 is thermally transferred to the base material 10 ′ to form the colored layers 11 ′, 12 ′, 13 ′, and 14 ′ in FIG. 5. In FIG. 5, the adhesive layer 22 'may be omitted. The film thickness of each layer in FIG. 5 etc. is exaggerated.

  The colored layer 21 'is formed by printing on the sheet 20' by screen printing. At that time, the ink is printed thick like the colored layer 21 of the first embodiment. Specifically, the film thickness of the ink may be, for example, a film thickness that is thicker than the film pressure (about 1 μm) that can be obtained by normal gravure printing and that can be achieved by screen printing, for example, 5 μm or more. The screen printing method may be the above-described known method.

  When forming the colored layer 21 'as a pattern of a plurality of colors, the screen is replaced for each color and screen printing is repeated for the number of colors. In the case of using a plurality of colors in the example of FIG. 5, the colored layers 11 ′, 12 ′, 13 ′, and 14 ′ are further divided into regions for each color. A plurality of screens having a print pattern for each color print area is used. The adhesive layer 22 ′ is formed by printing on the same area as the colored layer 21 ′ by screen printing on the colored layer 21 ′.

  Note that since the ink film thickness can be increased as described above even in offset printing, screen printing may be changed to offset printing as described above. Note that the above-described known ink may be used.

  FIG. 7 shows a state of thermal transfer (hot stamp) in the second embodiment. In the thermal transfer step, first, the base material 10 ′ is fixed to the jig 4 ′, and the transfer sheet 2 ′ described above, the protective layer 23, the colored layer 21 ′, and the adhesive layer 22 ′ are used as the surface 1a of the base material 10 ′. It fixes to the holder 40 so as to oppose '. At that time, the colored layer 21 ′ is positioned so as to be at a desired position on the surface 1 a ′ of the substrate 10 ′. The subsequent procedure may be the same as in the first embodiment. As a result, the protective layer 23 and the colored layer 21 ′ adhesive layer 22 ′ are thermally transferred to the surface 1 a ′ of the substrate 10 ′.

  FIG. 8 shows a manufacturing process of the decorative body 1 ′ including thermal transfer. This step is only the addition of step S15 to the procedure of FIG. Since other than that is the same as FIG. 4, description is abbreviate | omitted. In step S15, the protective layer 23 is printed on the sheet 20 '. That is, as shown in FIG. 6, the protective layer 23 is formed on the sheet 20 'by screen printing or offset printing.

  In the decorative body 1 ′ completed by the procedure of FIG. 8, the colored layers 11 ′, 12 ′, 13 ′, and 14 ′ are protected by the protective layer 16, and the colored layers 11 ′, 12 ′, 13 ′, and 14 are further protected. 'Is formed with a thick ink film. Therefore, the possibility that the colored layers 11 ′, 12 ′, 13 ′, and 14 ′ are damaged and the decorativeness is lowered is reduced.

  Next, a modification of the second embodiment will be described. In this modification, the protective layer 16 is not thermally transferred together with the colored layer 21 ′ adhesive layer 22 ′, but only the colored layer 21 ′ adhesive layer 22 ′ is thermally transferred, and then the protective layer 16 is applied by a coating process. It is formed. Below, the changed part from the above-mentioned Example 2 is demonstrated.

  First, the protective layer 23 is not formed on the transfer sheet 2 'of FIG. Then, the decorative body 1 'is manufactured according to the procedure of FIG. The manufacturing process of FIG. 9 is only the addition of step S45 to that of FIG. Since other than that is the same as FIG. 4, description is abbreviate | omitted. In step S45, the protective layer 23 is applied to the surface 1a 'of the substrate 10' after the colored layer 21 'has been thermally transferred. The protective layer 23 may be formed by spray-coating, for example, a colorless and transparent resin liquid or a colorless and transparent ink containing a polymer and having a protective function. The above is a modification of the second embodiment. In Example 2 (including modifications), the protective layer 23 may be omitted if it is determined that sufficient resistance can be ensured from the thickness of the film. In this case, simplification of the manufacturing process and cost reduction can be realized.

  In each of the above embodiments and modifications, the shape of the decorative body 1 and the region of the colored layer are designed as shown in FIGS. 1 and 5. As is apparent from the above description, the manufacturing method of the present invention is not limited to these. No restrictions are imposed on the shape. Therefore, the shape of the decorative body 1 or the colored layer can be any shape or design such as a geometric shape or a character shape.

1, 1 'decorative body 2, 2' transfer sheet 10, 10 'substrate 11, 12, 13, 14, 21, 11', 12 ', 13', 14 ', 21' colored layer 20, 20 'sheet 22 , 22 'Adhesive layer 23 Protective layer

Claims (6)

A base material that is fixed to a part of the article, is formed of a transparent material, and has a concave curved surface on the back surface that is a surface in contact with the article ;
The ink is transferred from the transfer sheet on which the ink is printed by thermal transfer so that the transparent material can be viewed through the transparent material from the surface side that is the surface that does not contact the article in the substrate. A colored layer formed by being transferred to the concave curved surface on the back surface, and colored on the concave curved surface on the back surface ;
With
Thickness of the ink in the colored layer, the printing ink to the transfer sheet, a screen printing, a film thickness is formed by any of the offset printing, and be more thickness possible in gravure printing ,
A decorative body, wherein a protective layer for protecting the colored layer is not formed on the colored layer formed on the substrate. A base material that is fixed to a part of the article and has a curved shape in which the surface side that does not contact the article bulges ;
A colored layer colored on the bulging curved surface of the surface, formed by transferring the ink from the transfer sheet on which the ink is printed to the bulging curved surface of the surface of the substrate by thermal transfer ;
With
Thickness of the ink in the colored layer, the printing ink to the transfer sheet, a screen printing, a film thickness is formed by any of the offset printing, and be more thickness possible in gravure printing ,
A decorative body, wherein a protective layer for protecting the colored layer is formed on the colored layer formed on the substrate. The ink printed on the colored layer is a plurality of colors,
The colored layer is formed by pressing the transfer sheet from the flexible flat transfer sheet on which the ink has been printed to the curved surface of the substrate while being bent, and deforming into the curved shape. The ornament according to claim 1 or 2, formed by being transferred to the curved surface . The decorative body according to any one of claims 1 to 3, wherein a film thickness of the ink in the colored layer is 5 µm or more.   Using a base material that is fixed to a part of the article, is formed of a transparent material, and has a concave curved surface on the back surface that is a surface that contacts the article,
  A printing step of printing a plurality of colors of ink on a flexible flat transfer sheet with a film thickness equal to or greater than that possible by gravure printing by screen printing or offset printing;
  The transfer sheet bends from the transfer sheet on which the ink has been printed by the printing step so that the transparent material can be seen through the transparent material from the surface side that is the surface that does not contact the article in the base material. While being pressed to the concave curved surface of the back surface of the base material and deformed into the shape of the concave curved surface, the thermal transfer step of thermally transferring the ink to the concave curved surface of the back surface of the base material,
  A method for producing a decorative body, comprising:   Using a base material that is fixed to a part of the article and has a curved shape in which the surface side that does not contact the article is swollen,
  A printing step of printing a plurality of colors of ink on a flexible flat transfer sheet with a film thickness equal to or greater than that possible by gravure printing by screen printing or offset printing;
  From the transfer sheet on which ink is printed by the printing process, the transfer sheet is pressed against the bulged curved surface of the substrate while the transfer sheet is bent, and the ink is deformed into the bulged curved shape. A thermal transfer process for thermal transfer to the bulging curved surface of the surface,
  A method for producing a decorative body, comprising:

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