Decorative sheet set, decorative article, and method for manufacturing decorative article

Abstract

To manufacture a decorative article of excellent ornamental design.SOLUTION: A decorative sheet set includes: a first decorative sheet that has a first image formed by thermal transfer on a first substrate; and a second decorative sheet that has a second image formed by thermal transfer on a second substrate. The light transmittance of 380 nm or more and 780 nm or less in the wavelength region of the entire first decorative sheet before the formation of the first image is 10% or over. The light transmittance of 380 nm or more and 780 nm or less in the wavelength region of at least a part of the region where the second image of the second decorative sheet is formed on is less than 10%.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a decorative sheet set, a decorative article, a method for manufacturing a decorative article, and a decorative sheet.

Background Art

[0002] As recording media used for image formation, various types are known. For example, recording media used in various image formation methods such as sublimation transfer method, melt transfer method, inkjet printing method, toner printing method, etc. are known. Such a recording medium has an image layer corresponding to the image formation method, and by forming an image on the image layer by various image formation methods, a printed matter with an image formed on the image layer of the recording medium can be manufactured.

[0003] Attempts have also been made to use a printed matter manufactured using the above-described recording medium as a decorative sheet and use this decorative sheet for decorating an article that is an object to be decorated. For example, a printed matter manufactured by forming an image on an image layer is used as a decorative sheet, and decorative articles are manufactured by in-mold molding, insert molding, etc. Patent Document 1 proposes a decorative sheet in which an image layer is provided on a resin sheet and the image layer is an ink-cured image of an inkjet ink composition, and a method for manufacturing a decorative article.

[0004] There is a demand for manufacturing new decorative articles with high design quality using a decorative sheet.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] The present disclosure aims to provide a method for manufacturing a decorative article capable of manufacturing a highly decorative article, a decorative sheet, a decorative sheet set, and a highly decorative article that can be used in the method for manufacturing a decorative article.

Means for Solving the Problems

[0007] A decorative sheet set according to one aspect of the present disclosure includes a first decorative sheet having a first image formed thereon by thermal transfer on a first base material, and a second decorative sheet having a second image formed thereon by thermal transfer on a second base material. The light transmittance of the entire first decorative sheet in the wavelength range of 380 nm or more and 780 nm or less before the formation of the first image is 10% or more, and the light transmittance of at least a part of the region where the second image of the second decorative sheet is formed in the wavelength range of 380 nm or more and 780 nm or less is less than 10%.

[0008] A decorative article according to one aspect of the present disclosure includes a container having a bottom surface portion and a side wall portion rising from the outer peripheral edge of the bottom surface portion. At opposing positions on the outer peripheral surface of the side wall portion, a first decorative sheet and a second decorative sheet are integrated with the container. The first decorative sheet has a first image formed thereon by thermal transfer on a first base material. The light transmittance of the entire first decorative sheet in the wavelength range of 380 nm or more and 780 nm or less before the formation of the first image is 10% or more, and it is integrated with the container on the formation surface side of the first image. The second decorative sheet has a second image formed thereon by thermal transfer on a second base material. The light transmittance of the region where the second image is formed in the wavelength range of 380 nm or more and 780 nm or less is less than 10%, and it is integrated with the container on the formation surface side of the second image.

[0009] A method for manufacturing a decorative article according to one aspect of the present disclosure includes a step of integrating the first decorative sheet of the decorative sheet set on the formation surface side of the first image at a predetermined position on the outer peripheral surface of the side wall portion of a container having a bottom surface portion and a side wall portion rising from the outer peripheral edge of the bottom surface portion, and a step of integrating the second decorative sheet on the formation surface side of the second image at a position facing the predetermined position in the side wall portion.

[0010] A decorative sheet according to an aspect of the present disclosure is a decorative sheet for decorating a side wall portion of a container having a bottom surface portion and a side wall portion rising from an outer peripheral edge of the bottom surface portion, and includes a base material, and a first image formed by a sublimation transfer recording method and a second image formed by a melt transfer recording method on the base material. The first image is an image obtained by horizontally inverting an image to be combined with the second image, and a distance between a region where the first image is formed and a region where the second image is formed is half of an outer peripheral length of the side wall portion.

Effects of the Invention

[0011] According to the present disclosure, a highly decorative product can be manufactured.

Brief Description of the Drawings

[0012]

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Modes for Carrying Out the Invention

[0013] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Note that, for the sake of clarity in the description, the drawings may schematically represent the width, thickness, shape, etc. of each part as compared with the actual aspect, but this is merely an example and does not limit the interpretation of the present invention. Also, for the sake of convenience in the description, terms such as above or below are used, but the up and down directions may be reversed.

[0014] FIG. 1 is a cross-sectional view of an image receiving sheet S used for producing a decorative sheet according to an embodiment of the present disclosure. The image receiving sheet S includes a base material 1 and a receiving layer 2 provided on the base material 1.

[0015] The base material 1 includes a film base material. Examples of the film base material include polyesters such as polyethylene terephthalate and polyethylene naphthalate, polyolefins, polyvinyl chloride, polymethacrylate, polypropylene, polycarbonate, cellulose acetate, polyethylene derivatives, polyamides, and polymethylpentene. These film base materials may be stretched or unstretched.

[0016] There is no limitation on the thickness of the base material 1, but for example, it is about 1 μm or more and 300 μm or less.

[0017] The receiving layer 2 has a function of receiving sublimable dyes. Examples of materials that easily receive sublimable dyes include polyolefins such as polypropylene, halogenated resins such as polyvinyl chloride or polyvinylidene chloride, vinyl resins such as polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, ethylene-vinyl acetate copolymer or polyacrylate ester, polyesters such as polyethylene terephthalate or polybutylene terephthalate, polystyrene, polyamide, copolymers of olefins such as ethylene or propylene and other vinyl polymers, cellulose resins such as ionomer or cellulose diastase, polycarbonate, epoxy resin, etc. In particular, vinyl chloride resin, acrylic-styrene resin or polyester is preferable.

[0018] There is no limitation on the thickness of the receiving layer 2, but for example, it is about 0.1 μm or more and 10 μm or less.

[0019] The image receiving sheet S has transparency, with the light transmittance in the visible light region of the entire sheet being 10% or more, preferably 30% or more, and more preferably 45% or more. Here, the visible light region refers to light with a wavelength range of 380 nm or more and 780 nm or less. Also, transparency includes not only colorless transparency but also translucent and colored transparency.

[0020] The light transmittance in the visible light region of the entire image receiving sheet S means the light transmittance in the visible light region in the thickness direction of the laminate of all the constituent members constituting the image receiving sheet S, that is, the light transmittance in the visible light region in the thickness direction of the laminate of the base material 1 and the receiving layer 2.

[0021] The light transmittance in the visible light region was measured by an apparatus in which an integrating sphere attachment device ISR - 3100 (manufactured by Shimadzu Corporation) was attached to a spectrophotometer (UV - 3100PC, Shimadzu Corporation). Specifically, the light transmittance in the visible light region of the entire sheet was measured by installing the sheet to be measured on the sample light beam side of this apparatus and measuring the light transmittance of light from 380 nm to 780 nm, which is the visible light region. For example, when the light transmittance in the visible light region of the entire sheet is 10% or more, it means that the light transmittances in the visible light region are all 10% or more.

[0022] As shown in FIG. 2A, an image G1 (first image) is formed on the receiving layer 2 by the sublimation transfer method to produce the first decorative sheet 10. The sublimation transfer method is an image forming method in which a thermal transfer sheet provided with a color material layer containing a sublimable dye is used, thermal energy corresponding to image information is applied to the thermal transfer sheet, and the sublimable dye contained in the color material layer is transferred to the receiving layer 2 to form an image. The sublimable dyes are yellow dyes, magenta dyes, cyan dyes, fluorescent dyes, etc.

[0023] As shown in FIG. 2B, an image G2 (second image) is formed on the receiving layer 2 by a thermal transfer method to produce a second decorative sheet 20. The thermal transfer method is an image forming method in which a thermal transfer sheet provided with a coloring material layer containing a molten ink is used, thermal energy corresponding to image information is applied to the thermal transfer sheet, and the coloring material layer melted or softened by the application of the thermal energy is transferred as a layer to the receiving layer 2 to form an image. The molten ink is a colorant such as a black pigment, a metallic pigment, a pearl pigment, or a fluorescent pigment. When the image G2 is formed only by the thermal transfer method, the receiving layer 2 of the second decorative sheet 20 may be omitted.

[0024] In the first decorative sheet 10, the region where the image G1 is formed has a lower light transmittance in the visible light region than the region where no image is formed. However, since the image G1 is an image formed by a sublimable dye, it has transparency. On the other hand, in the second decorative sheet 20, at least a part of the region where the image G2 is formed has a light transmittance in the visible light region of less than 10%, preferably 5% or less, and has concealability.

[0025] <Decorative article> The decorative article according to the present embodiment is an integrated product of the first decorative sheet 10 and the second decorative sheet 20 and the object to be decorated. The object to be decorated is a container B capable of accommodating a liquid or the like as shown in FIG. 3A.

[0026] The container B includes a bottom surface and a side wall portion rising from the outer peripheral edge of the bottom surface, and is, for example, cylindrical or prismatic. The upper part of the container B may be open, or a lid portion that can be opened and closed may be provided. FIG. 3A shows an example of a bottle-shaped container B whose diameter decreases upward and is provided with a lid portion at the upper end.

[0027] As shown in FIGS. 3A and 3B, the first decorative sheet 10 and the second decorative sheet 20 are integrated with the outer peripheral surface of the container B such that the image forming surfaces face each other.

[0028] When the side wall of container B is viewed from the first decorative sheet 10 side with the container B empty, the image G2 formed on the second decorative sheet 20 can be visually recognized, having transparency. The transparency here includes not only colorless and transparent, but also translucent and colored transparent. For example, the side wall of container B is a transparent body with a light transmittance of 10% or more in the visible light region (wavelength region of 380 nm or more and 780 nm or less). It is more preferable that container B has a light transmittance of 30% or more in the wavelength region of 380 nm or more and 780 nm or less, and particularly preferably 45% or more.

[0029] Examples of the material of container B include polyethylene terephthalate, acrylic resin, polycarbonate, glass, etc.

[0030] When the container B is filled with substances with low transparency, such as milk tea, coffee, vegetable juice, etc., and the decorative item is viewed from the base material 1 side of the first decorative sheet 10, as shown in FIG. 4A, only the image G1 can be visually recognized, and the image G2 of the second decorative sheet 20 cannot be visually recognized. By setting the image G1 formed on the receiving layer 2 of the first decorative sheet 10 as an inverted image, when the decorative item is viewed from the base material 1 side, an image in a non-inverted state can be seen.

[0031] It is preferable that the content of container B has a light transmittance of 50% or less in the wavelength region of 380 nm or more and 780 nm or less, and more preferably 30% or less. In order to improve the visibility of the image G1, it is preferable that the content of container B has a light transmittance of 5% or more in the wavelength region of 380 nm or more and 780 nm or less. Also, it is preferable that the color difference ΔE*ab between the image G1 and the content of container B is 5 or more, and more preferably 10 or more.

[0032] When the decorative item is viewed from the first decorative sheet 10 side with the container B empty, through the first decorative sheet 10 and the container B, the image G2 of the second decorative sheet 20 can be visually recognized. As shown in FIG. 4B, the image G1 and the image G2 overlap, and the image G2 can be seen behind the image G1, resulting in a decorative item with a novel and three-dimensional design.

[0033] The region where the image G2 of the second decorative sheet 20 is formed has a light transmittance in the visible light region of less than 10%. When viewing the ornament from the side of the first decorative sheet 10, the rear (back) side of the image G2 is difficult to see. Therefore, the image G2 can be made prominent.

[0034] As an example, the image G1 formed on the first decorative sheet 10 and the image G2 formed on the second decorative sheet 20 can be combined to form a new single image by overlapping them. Specifically, they are overlapped so that the image G1 is on the upper side and the image G2 is on the lower side. Therefore, the image G1 can be referred to as the foreground image and the image G2 as the background image.

[0035] The image G1 formed on the first decorative sheet 10 is a reversed (left - right) version of the foreground image. When viewing the image G1 from the side of the base material 1, it is the normal non - reversed foreground image. Instead of the image G1, the image G2 may be the reversed image.

[0036] In the above - described embodiment, the configuration in which the first decorative sheet 10 and the second decorative sheet 20 are separate bodies has been described. However, as shown in FIG. 5, the images G1 and G2 may be formed separately on a long strip - shaped image - receiving sheet to form a single decorative sheet 30. The length of the decorative sheet 30 is approximately the same as the outer peripheral length of the container B. The distance d between the image G1 and the image G2 is approximately half of the outer peripheral length of the side wall portion of the container B.

[0037] As shown in FIG. 6, the decorative sheet 30 is wound around the container B and integrated with the container B on the side of the receiving layer 2 to manufacture the ornament.

[0038] The method of integrating the decorative sheets 10, 20, 30 with the container B is not limited. For example, an adhesive layer can be provided on the receiving layer 2. The adhesive layer may be one having a transparency such that the light transmittance in the visible light region of the decorative sheet having the adhesive layer is 10% or more.

[0039] The adhesive layer contains a component having adhesiveness. Examples of the component having adhesiveness include acrylic resins, vinyl chloride-vinyl acetate copolymers, vinyl acetate resins, polyesters, epoxy resins, polyimides, synthetic rubbers, and the like. Further, the adhesive layer may contain a plurality of components as the component having adhesiveness. Also, the adhesive layer may be an adhesive film or an adhesive sheet (double-sided adhesive sheet). The thickness of the adhesive layer is preferably 1 μm or more and 1000 μm or less.

[0040] The content of the component having adhesiveness in the adhesive layer is preferably 50% by mass or more. The glass transition temperature (Tg) of this component having adhesiveness is preferably less than 35°C, more preferably less than 0°C. Thereby, the adhesiveness can be improved. In the present disclosure, Tg is a value determined by differential scanning calorimetry (DSC) in accordance with JIS-K-7121.

[0041] The adhesive layer means one that can bond and integrate the decorative sheets 10, 20, 30 and the object to be decorated. The adhesive layer may have a single-layer structure consisting only of a layer having adhesiveness, or may have a laminated structure in which layers having adhesiveness are laminated. Also, it may have a laminated structure in which layers having adhesiveness are provided on both sides of a film or the like.

[0042] The decorative sheets 10, 20, 30 and the container B may be integrated using a vacuum forming machine.

[0043] As shown in FIG. 7, a decorative sheet may be produced using a so-called intermediate transfer medium in which a release layer 3 and a peeling layer 4 are provided in this order from the substrate 1 side between the substrate 1 and the receiving layer 2. The intermediate transfer medium forms an image on the receiving layer 2, presses and heats the intermediate transfer medium and the object to be transferred, and thermally transfers the transfer layer 5 including the peeling layer 4 and the receiving layer 2 to the object to be transferred side to form an image on the object to be transferred.

[0044] As the release layer 4, a material having transparency such that the light transmittance of the transfer layer 5 in the visible light region is 10% or more may be used. Examples of the material of the release layer 4 include cellulose derivatives such as ethyl cellulose, nitrocellulose, and cellulose acetate; acrylic resins such as polymethyl methacrylate, polyethyl methacrylate, and polybutyl acrylate; thermoplastic resins such as vinyl copolymers such as polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, and polyvinyl butyral; and thermosetting resins such as saturated or unsaturated polyester resins, polyurethanes, thermally crosslinkable epoxy-amine resins, and amino alkyd resins. Further examples include silicone wax, silicone resin, silicone-modified resin, fluororesin, fluorine-modified resin, and polyvinyl alcohol.

[0045] The thickness of the release layer 4 is not particularly limited, and is, for example, about 0.1 μm or more and 5 μm or less.

[0046] The release layer 3 is provided between the base material 1 and the release layer 4, and facilitates peeling of the transfer layer 5 including the receiving layer 2 from the base material 1 during heating. During thermal transfer, peeling occurs between the release layer 3 and the release layer 4.

[0047] The release layer 3 is formed from a material excellent in releasability such as waxes, silicone wax, silicone resin, and fluororesin, or a resin having a relatively high softening point that does not melt by the heat of the thermal head, or a resin containing a thermal release agent such as wax in these resins. Examples of the resin having a relatively high softening point include acrylic resin and polyurethane.

[0048] As shown in FIG. 8A, an image G1 is formed on the receiving layer 2 by a sublimation transfer method to produce a decorative sheet 12. Further, as shown in FIG. 8B, an image G2 is formed on the receiving layer 2 by a melt transfer method to produce a decorative sheet 22.

[0049] The decorative sheets 12 and 22 are overlapped on the outer peripheral surface of the container B, which is an object to be decorated, from the side of the receiving layer 2, and heated from the side of the base material 1 to transfer the transfer layer 5 to the outer peripheral surface of the container B as shown in FIG. 9.

[0050] An adhesive layer may be provided on the receiving layer 2, the adhesive layer may be adhered to the outer peripheral surface of the container B, and the transfer layer 5 may be peeled off from the base material 1 and transferred. The adhesive layer may be pattern-transferred onto the receiving layer 2.

[0051] The release layer 3 may contain a filler, and unevenness may be provided at the interface between the release layer 4 and the release layer 3. When the transfer layer 5 is transferred to the container B, the surface of the transfer layer 5 (release layer 4) becomes matte. The degree of matting can be adjusted according to the particle size and content of the filler.

[0052] The base material 1 and the release layer 3 may be integrated with the container B without being peeled off.

[0053] The container B of the object to be decorated is not limited to a bottle, and it may be something in which the contents move inside the container, such as the hourglass T or the oil clock (liquid hourglass) shown in FIG. 10. For example, the first decorative sheet 10 and the second decorative sheet 20 are integrated on the outer peripheral surface of the first region of the container where the contents move between the first region and the second region. When there is content in the first region, only the image G1 of the first decorative sheet 10 can be seen, and the image G2 of the second decorative sheet 20 cannot be seen. When the content is moved from the first region to the second region, the image G2 of the second decorative sheet 20 can be seen behind the image G1 of the first decorative sheet 10.

[0054] As shown in FIG. 11, the images G21 and G22 may be formed by overlapping on the second decorative sheet 20A by a melt transfer method. The size of the lower image G21 (third image) is about the same as or slightly larger than the upper image G22 (second image).

[0055] When such a second decorative sheet 20A is integrated with the container B, as shown in FIG. 12, when looking at the ornament from the side of the first decorative sheet 10 with the inside of the container B empty, the image G22 of the second decorative sheet 20 can be visually recognized through the first decorative sheet 10 and the container B. On the other hand, when looking at the ornament from the side of the second decorative sheet 20, the image G21 can be seen. Different designs can be achieved depending on the viewing direction of the ornament.

[0056] The images G21 and G22 may have different hues and patterns. When the container B is empty and the ornament is viewed from the side of the first decorative sheet 10, patterns and characters different from those of the image G22 may be visible.

[0057] In the above embodiment, an example of forming the image G2 on the second decorative sheet 20 by the melt transfer method has been described. However, it is only necessary that the light transmittance in the visible light region can be made less than 10%. For example, an inkjet printing method, a toner printing method, an offset printing method, a gravure printing method, a flexographic printing method, a screen printing method, etc. can be exemplified.

[0058] Note that the present disclosure is not limited to the above embodiment as it is. In the implementation stage, the components can be deformed and embodied without departing from the gist. Also, various inventions can be formed by appropriately combining a plurality of components disclosed in the above embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, components from different embodiments may be appropriately combined.

Explanation of Reference Numerals

[0059] 1 Base material 2 Receiving layer 3 Release layer 4 Peeling layer 5 Transfer layer 10 First decorative sheet 20 Second decorative sheet 30 Decorative sheet

Claims

1. A first decorative sheet having a first image formed thereon by thermal transfer on a first base material, A second decorative sheet having a second image formed thereon by thermal transfer on a second base material, Comprising, Before the formation of the first image, the light transmittance of the entire first decorative sheet in the wavelength range of 380 nm or more and 780 nm or less is 10% or more, The light transmittance of at least a part of the region where the second image of the second decorative sheet is formed in the wavelength range of 380 nm or more and 780 nm or less is less than 10%, The first image is an image formed by the sublimation transfer recording method, and the second image is an image formed by the melt transfer recording method, A third image is formed on the second base material by the melt transfer recording method, and the second image is formed on the third image, a decorative sheet set.

2. The first image and the second image are combined images, and the first image or the second image is formed on the first decorative sheet or the second decorative sheet in an inverted manner. The decorative sheet set according to claim 1.

3. Comprising a container having a bottom surface portion and a side wall portion rising from the outer peripheral edge of the bottom surface portion, At opposing positions on the outer peripheral surface of the side wall portion, the first decorative sheet and the second decorative sheet are integrated with the container, The first decorative sheet has a first image formed thereon by thermal transfer on a first base material. Before the formation of the first image, the light transmittance of the entire first decorative sheet in the wavelength range of 380 nm or more and 780 nm or less is 10% or more, and it is integrated with the container on the formation surface side of the first image, The second decorative sheet has a second image formed thereon by thermal transfer on a second base material. The light transmittance of the region where the second image is formed in the wavelength range of 380 nm or more and 780 nm or less is less than 10%, and it is integrated with the container on the formation surface side of the second image. A decorative article.

4. The side wall portion has a light transmittance in the wavelength range of 380 nm or more and 780 nm or less of 10% or more. The decorative article according to claim 3.

5. A step of integrating the first decorative sheet of the decorative sheet set according to claim 1 or 2 on the formation surface side of the first image at a predetermined position on the outer peripheral surface of the side wall portion of a container having a bottom surface portion and a side wall portion rising from the outer peripheral edge of the bottom surface portion, A step of integrating the second decorative sheet on the formation surface side of the second image at a position facing the predetermined position in the side wall portion, A method for manufacturing a decorative article.

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