Container and method for manufacturing the container

Abstract

To provide a container which presents highly beautiful appearance by using a light source.SOLUTION: A container includes: a light transmission base material having an inside surface coming into contact with a content and an opposite surface on the opposite side from the inside surface; a same color ink layer formed at least on one surface of the light transmission base material, and pattered using the same color as the light transmission base material; and a printing layer formed at least on one of a surface in which the same color ink layer of the light transmission base material is provided and the same color ink layer, and including the color different from the same color ink layer. A manufacturing method of container includes the steps of: forming the same color ink layer patterned using the same color as the light transmission base material, at least on one surface of the light transmission base material; and forming the printing layer including the color different from the same color ink layer, at least on one of the surface in which the same color ink layer of the light transmission base material is provided and the same color ink layer.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a container and a method for manufacturing a container. [Background technology]

[0002] It is known that various designs are applied to containers such as paper cups to create a beautiful appearance (Patent Documents 1 and 2). However, no containers that use a light source to create a highly beautiful appearance are known. [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-155448 [Patent Document 2] JP 2006-160321 A Summary of the Invention

[0003] In a first aspect of the present invention, a container is provided that includes a light-transmitting substrate having an inner surface that contacts the contents and an opposite surface opposite the inner surface, a same-color ink layer formed on at least one surface of the light-transmitting substrate and patterned in the same color as the light-transmitting substrate, and a printed layer formed on at least one of the surface of the light-transmitting substrate on which the same-color ink layer is provided and on the same-color ink layer, and containing a color different from that of the same-color ink layer.

[0004] In addition, in a second aspect, a method for manufacturing the above-mentioned container is provided, which includes the steps of forming a same-color ink layer patterned in the same color as the light-transmitting substrate on at least one surface of the light-transmitting substrate, and forming a printed layer containing a color different from that of the same-color ink layer on at least one of the surface of the light-transmitting substrate on which the same-color ink layer is provided and on the same-color ink layer.

[0005] The above summary of the invention does not list all of the necessary features of the present invention, and subcombinations of these features may also be inventions. [Brief explanation of the drawings]

[0006] [Figure 1] 1 shows an example of a container 100 in this embodiment. [Figure 2] An example of the layer structure of the container 100 in this embodiment is shown. [Figure 3] An example of a mechanism in which a pattern or the like changes when irradiated with light in the container 100 in this embodiment will be described. [Figure 4] 1 shows an example of the appearance of a container 100 in this embodiment. [Figure 5] 1 shows an example of the appearance of a container 100 in this embodiment. [Figure 6] 1 shows a modified example of the container 100 in this embodiment. [Figure 7] 1 shows a modified example of the container 100 in this embodiment. [Figure 8] 10 shows a modified example of the layer structure of the container 100 in this embodiment. [Figure 9] 1 shows a modified example of the appearance of the container 100 in this embodiment. [Figure 10] 10 shows a modified example of the layer structure of the container 100 in this embodiment. [Figure 11] 10 shows a modified example of the layer structure of the container 100 in this embodiment. [Figure 12] An example of a flow for manufacturing the container 100 in this embodiment will be described. [Figure 13] A modified example of the flow for manufacturing the container 100 in this embodiment will be described. DETAILED DESCRIPTION OF THE INVENTION

[0007] The present invention will be described below through embodiments of the invention, but the following embodiments do not limit the scope of the invention as claimed. Furthermore, not all of the combinations of features described in the embodiments are necessarily essential to the solution of the invention.

[0008] FIG. 1 shows an example of a container 100 in this embodiment. The container 100 is a container such as a paper cup that can hold contents and exhibits an aesthetic appearance when lit from the inside. The container 100 may be used to hold beverages or food. It may also be used for decorative purposes. The container 100 includes a light-transmitting substrate 10, a same-color ink layer 20, and a printed layer 30.

[0009] The light-transmitting substrate 10 functions as a support for the container 100 and provides the container 100 with appropriate strength. The light-transmitting substrate 10 has an inner surface 12 that contacts the contents and an opposite surface 14 opposite the inner surface 12. The light-transmitting substrate 10 transmits at least a portion of the irradiated light irradiated from the inner surface 12. The light-transmitting substrate 10 includes a light-transmitting material, and may include, for example, paper. Examples of paper used for the light-transmitting substrate 10 include kraft paper, fine paper, construction paper, glassine paper, parchment paper, synthetic paper, white cardboard, manila cardboard, milk carton base paper, cup base paper, and ivory paper.

[0010] The same-color ink layer 20 forms a shadow when light is irradiated from the inner surface 12 side, thereby giving the container 100 a unique aesthetic appearance. For example, the same-color ink layer 20 is a layer in which a pattern is formed with ink of the same color as the light-transmitting substrate 10.

[0011] The same-color ink layer 20 is formed on at least one surface of the light-transmitting substrate 10. For example, the same-color ink layer 20 may be formed on either the inner surface 12 or the opposite surface 14 of the light-transmitting substrate 10, or may be formed on both. The same-color ink layer 20 may be formed on any portion of each of the inner surface 12 and the opposite surface 14 of the container 100, including the side surface and the bottom. For example, as shown in FIG. 1 , the same-color ink layer 20 may be formed on the side surface of the opposite surface 14 of the container 100, or may be formed on the inner surface 12 of the bottom.

[0012] The same-color ink layer 20 is formed with a pattern of a design, picture, character, symbol, etc. (hereinafter collectively referred to as "picture, etc.") using ink of the same color as the light-transmitting substrate 10. The same-color ink layer 20 is preferably a similar color to the light-transmitting substrate 10 so that the boundary is not easily visible in appearance. For example, when the light-transmitting substrate 10 has a white paper substrate, the same-color ink layer 20 preferably contains white ink.

[0013] In the container 100 of this embodiment, the same-color ink layer 20 has a color difference ΔE * may be composed of an ink layer having a ΔE * It is preferable that the light-transmitting substrate 10 is composed of an ink layer having a viscosity of 3.5 or less. This makes it possible to make the boundary between the light-transmitting substrate 10 and the same-color ink layer 20 in containers such as beverage containers that are held by general consumers invisible.

[0014] In addition, the same-color ink layer 20 has a color difference ΔE * may be composed of an ink layer in which ΔE * is preferably 1.0 or more. This allows the shadow formed by the same-color ink layer 20 to be made clearer when light is irradiated onto the container 100, which is a container that is held by a general consumer, such as a beverage container.

[0015] Color difference ΔE * is the L specified in JISZ8730:2009 * a * b * It is an index shown using the color system, and is the CIE lightness L of two object colors. * and chromaticity a * , b * The lightness, chromaticity and color difference can be measured using a colorimeter or the like. ΔE * =[(ΔL * ) 2 +(Δa * ) 2 +(Δb *) 2 ] 1 / 2

[0016] Lightness L of the same color ink layer 20 * and chromaticity a * , b * is the lightness L of the light-transmitting substrate 10 when the same color ink layer 20 is formed on the surface of the light-transmitting substrate 10. * and chromaticity a * , b * Therefore, the color difference ΔE between the light-transmitting substrate 10 and the same-color ink layer 20 * The measurement may be performed in a state where the same color ink layer 20 is formed on the surface of the light-transmitting substrate 10.

[0017] Color difference ΔE between the light-transmitting substrate 10 and the same-color ink layer 20 * may be adjusted by the thickness of the same color ink layer 20, the composition of the ink layer that constitutes the same color ink layer 20, the colorant contained in the ink layer, and the like.

[0018] The same-color ink layer 20 may be a single layer or may be formed of multiple layers. When formed of multiple layers, the shadow formed by the same-color ink layer 20 when irradiated with light can be made clearer. A gradation may be formed in the pattern of the same-color ink layer 20.

[0019] The printed layer 30 represents a pattern formed by various printing methods. Furthermore, when light is irradiated, the shadow formed in the same-color ink layer 20 overlaps with the pattern on the printed layer 30, thereby changing the pattern on the printed layer 30 and giving the container 100 a unique aesthetic appearance.

[0020] The printed layer 30 may be formed on either or both of the inner surface 12 and the opposite surface 14 of the light-transmitting substrate 10. The printed layer 30 may also be formed on any portion of the inner surface 12 and the opposite surface 14 of the container 100, including the side and bottom portions. For example, as shown in FIG. 1 , the printed layer 30 may be formed on the side of the opposite surface 14 of the container 100, or on the inner surface 12 of the bottom portion.

[0021] The printed layer 30 may be formed on at least one of the surface of the light-transmitting substrate 10 on which the same-color ink layer 20 is provided and the same-color ink layer 20. For example, the printed layer 30 may be formed on either the surface of the light-transmitting substrate 10 on which the same-color ink layer 20 is provided or the same-color ink layer 20, or may be formed on both the surface of the light-transmitting substrate 10 on which the same-color ink layer 20 is provided and the same-color ink layer 20 as shown in FIG.

[0022] The pattern formed on the print layer 30 is preferably a pattern that is different from the pattern formed on the same color ink layer 20, but may include at least a partially identical pattern.

[0023] The printed layer 30 contains a color different from that of the same-color ink layer 20. For example, if the same-color ink layer 20 is white, the printed layer 30 contains a color other than white. The printed layer 30 may be a single color or may contain multiple colors.

[0024] In the container 100 of this embodiment, the pattern formed in the same-color ink layer 20 is the same color as the light-transmitting substrate 10, and therefore, when light is not irradiated onto the container 100, the pattern formed in the same-color ink layer 20 is not easily visible. On the other hand, when light is irradiated onto the container 100, the pattern formed in the same-color ink layer 20 forms a shadow, and the image or design emerges. This allows for variation in the image or design formed on the container 100, and provides a container 100 that uses a light source to create a highly aesthetic appearance.

[0025] Fig. 2 shows an example of the layer structure of the container 100 in this embodiment. Fig. 2 is an enlarged view of the portion surrounded by dotted line A in the embodiment of Fig. 1, with the lower side of the view showing the inner surface 12 of the light-transmitting substrate 10 and the upper side showing the opposite surface 14 of the light-transmitting substrate 10. As shown in Fig. 2, the printed layer 30 may be formed on the same-color ink layer 20.

[0026] By forming the printing layer 30 on the same-color ink layer 20, when light is irradiated, the shadow formed by the pattern formed on the same-color ink layer 20 can impart a change in hue to the image or the like formed on the printing layer 30. For example, the pattern formed by the same-color ink layer 20 appears on the printing layer 30 as a dark or rich image or the like.

[0027] 3 shows an example of a mechanism in this embodiment whereby a pattern or the like changes upon irradiation of light in the container 100. When the irradiated light 210 emitted from the light source 200 passes through the pattern formed in the same-color ink layer 20, a portion of the irradiated light is blocked, and the amount of transmitted light 220 that passes through the pattern is reduced. The change in the amount of transmitted light 220 appears as a change in the hue of the light-transmitting substrate 10 or the printing layer 30, and the pattern or the like on the container 100 changes.

[0028] The amount of transmitted light 220 passing through the same-color ink layer 20 may be adjusted to adjust the change in hue in the light-transmitting substrate 10 or the printed layer 30. For example, the same-color ink layer 20 may be formed of multiple layers, and the thickness of the same-color ink layer 20 may be increased. This makes the shadows clearer and increases the change in hue. A gradation may be formed in the pattern of the same-color ink layer 20 to express a design that changes within the pattern.

[0029] 3, the irradiated light 210 is irradiated from the inner surface 12 side of the container 100, but if a change appears in the pattern or the like on the container 100, the irradiated light 210 may be irradiated from the opposite surface 14 side. For example, the irradiated light 210 may be irradiated from the opposite surface 14 side of the bottom of the container 100.

[0030] Fig. 4 shows an example of the appearance of the container 100 in this embodiment. In Fig. 4, the design formed on the printing layer 30 is indicated by solid lines, and the pattern formed on the same-color ink layer 20 is indicated by dotted lines. The pattern formed on the same-color ink layer 20 is the same color as the light-transmitting substrate 10, and is not easily visible from the outside when light is not irradiated onto the container 100. At this time, the design formed on the printing layer 30 is visible on the container 100.

[0031] FIG. 5 shows an example of the appearance of the container 100 in this embodiment. In the embodiment of FIG. 4, the change in the appearance of the container 100 when light is irradiated onto the container 100 from the inner surface 12 side is shown. When light is irradiated, the amount of transmitted light 220 that passes through the same-color ink layer 20 decreases, and the pattern formed in the same-color ink layer 20 forms a shadow. As a result, as shown in FIG. 5, the pattern formed in the same-color ink layer 20 appears on the printing layer 30 as a dark or rich pattern, and the pattern on the container 100 changes.

[0032] 6 and 7 show modified examples of the container 100 in this embodiment. The container 100 in this embodiment includes a light-transmitting substrate 10, a same-color ink layer 20, and a printed layer 30, and further includes a different-color ink layer 40 that is a different color from the same-color ink layer 20 and has at least a portion of a pattern common to the same color ink layer 20.

[0033] When light is irradiated from the inner surface 12 side, the different color ink layer 40 blocks a part of the irradiated light 210, making the change in the pattern or the like on the container 100 when light is irradiated more clearly.

[0034] The different color ink layer 40 may be formed on either or both of the inner surface 12 and the opposite surface 14 of the light-transmitting substrate 10. Furthermore, the different color ink layer 40 may be formed on any portion of each of the inner surface 12 and the opposite surface 14 of the container 100, including the side and bottom portions. For example, as shown in Fig. 6, the different color ink layer 40 may be formed on the side of the opposite surface 14 of the container 100, or on the inner surface 12 of the bottom portion.

[0035] As shown in Fig. 6, the different color ink layer 40 may be formed between the same color ink layer 20 and the light-transmitting substrate 10 on the surface of the light-transmitting substrate 10 on which the same color ink layer 20 is formed. Also, as shown in Fig. 7, the different color ink layer 40 may be formed on the surface of the light-transmitting substrate 10 opposite to the surface on which the same color ink layer 20 is formed, and the pattern formed in the different color ink layer 40 may be formed so as to overlap the pattern formed in the same color ink layer 20 with the light-transmitting substrate 10 sandwiched between them.

[0036] The different color ink layer 40 is formed in a color different from that of the same color ink layer 20. For example, if the same color ink layer 20 is white, the different color ink layer 40 is formed in a color other than white. The different color ink layer 40 preferably has a lower brightness than the same color ink layer 20. For example, the different color ink layer 40 may be black or gray. By forming the different color ink layer 40 in a color different from that of the same color ink layer 20, any misalignment between the same color ink layer 20 and the different color ink layer 40 can be easily detected, making it easier to align the same color ink layer 20 and the different color ink layer 40.

[0037] The different color ink layer 40 may be a single layer or may be formed of multiple layers. When formed of multiple layers, the shadow formed by the different color ink layer 40 when irradiated with light can be made clearer. A gradation may be formed in the pattern of the different color ink layer 40.

[0038] The same-color ink layer 20 and the different-color ink layer 40 may have a common pattern portion 310. The common pattern portion 310 is a portion where the pattern formed in the same-color ink layer 20 and the pattern formed in the different-color ink layer 40 overlap.

[0039] For example, as shown in Fig. 6, the common pattern portion 310 may be a portion where the same-color ink layer 20 and the different-color ink layer 40 are formed to overlap on the light-transmitting substrate 10. Also, as shown in Fig. 7, the common pattern portion 310 may be a portion where the same-color ink layer 20 and the different-color ink layer 40 form an overlap with the light-transmitting substrate 10 sandwiched therebetween.

[0040] The same-color ink layer 20 may have a common pattern portion 310 and an individual pattern portion 320. The individual pattern portion 320 is a portion of the pattern formed in the same-color ink layer 20 where the same-color ink layer 20 and the different-color ink layer 40 do not overlap.

[0041] 6, an individual pattern portion 320 may be a portion of a pattern formed in the same-color ink layer 20 where a different-color ink layer 40 is not formed between the same-color ink layer 20 and the light-transmitting substrate 10. Also, as shown in Fig. 7, an individual pattern portion 320 may be a portion of a pattern formed in the same-color ink layer 20 where a different-color ink layer 40 is not formed on the surface of the light-transmitting substrate 10 opposite to the surface on which the same-color ink layer 20 is formed.

[0042] The different color ink layer 40 may be formed with the same pattern as the common pattern portion 310. In this case, the different color ink layer 40 is covered by the same color ink layer 20 in the common pattern portion 310, and is not easily visible when not irradiated with light.

[0043] The different color ink layer 40 may be formed with a pattern other than the same pattern as the common pattern portion 310. The pattern other than the same pattern as the common pattern portion 310 is a portion of the common pattern portion 310 that is not covered by the same color ink layer 20, and can be seen as a picture or the like when not irradiated with light.

[0044] Fig. 8 shows a modified example of the layer structure of the container 100 in this embodiment. Fig. 8 is an enlarged view of the portion surrounded by dotted line B in the embodiment of Fig. 6, showing a cross section of the common pattern portion 310. The lower side of the figure is the inner surface 12 of the light-transmitting substrate 10, and the upper side is the opposite surface 14 of the light-transmitting substrate 10.

[0045] In the common pattern portion 310, when light is irradiated, a portion of the irradiated light 210 is blocked by the same-color ink layer 20 and the different-color ink layer 40. This makes the shadow formed by the same-color ink layer 20 clearer when light is irradiated. At this time, changes in the pattern and the like that appear on the light-transmitting substrate 10 and the printing layer 30 when light is irradiated appear more clearly.

[0046] The amount of transmitted light 220 passing through the different color ink layer 40 may be adjusted to adjust the change in hue in the light-transmitting substrate 10 or the printed layer 30. For example, the different color ink layer 40 may be formed of multiple layers, and the thickness of the different color ink layer 40 may be increased. This makes the shadows clearer and increases the change in hue. Furthermore, a gradation may be formed in the pattern of the different color ink layer 40 to express a design that changes within the pattern.

[0047] Fig. 9 shows a modified example of the appearance of the container 100 in this embodiment. In Fig. 9, the design formed on the print layer 30 is shown by solid lines, and the patterns formed on the same-color ink layer 20 and the different-color ink layer 40 are shown by dotted lines. As shown in Fig. 9, the same-color ink layer 20 has a common pattern portion 310 and individual pattern portions 320, and the different-color ink layer 40 has a pattern identical to the common pattern portion 310 formed thereon.

[0048] When light is not irradiated onto the container 100, the patterns formed in the same-color ink layer 20 and the different-color ink layer 40 are not easily visible. When light is irradiated, the patterns formed in the same-color ink layer 20 and the different-color ink layer 40 form shadows, which appear as dark or deep color patterns on the printing layer 30. At this time, the common pattern portion 310 appears on the printing layer 30 as a picture or the like that is darker or deeper in color than the individual pattern portions 320. This gives the container 100 different hue changes when irradiated with light, creating a diverse aesthetic appearance.

[0049] 10 shows a modified example of the layer structure of the container 100 in this embodiment. The container 100 may further include an inner surface resin layer 50 on the inner surface 12 of the light-transmitting substrate 10. The container 100 may also include an outer surface resin layer 51 on the opposite surface 14 of the light-transmitting substrate 10 in addition to or instead of the inner surface resin layer 50. The container 100 may also include an outer surface protective layer 60 on the outside of the printed layer 30. The inner surface resin layer 50, the outer surface resin layer 51, and the outer surface protective layer 60 impart water resistance, leak resistance, stain resistance, impact resistance, etc. to the container 100.

[0050] The inner surface resin layer 50 and the outer surface resin layer 51 may be formed by laminating a thermoplastic resin such as polyethylene. The outer surface protective layer 60 may be formed by coating with varnish or the like. The inner surface resin layer 50, the outer surface resin layer 51, and the outer surface protective layer 60 may be transparent.

[0051] 11 shows a modified example of the layer structure of the container 100 in this embodiment. The container 100 may further include a resin film 80 formed on the printed layer 30. The resin film 80 can impart gloss and abrasion resistance to the container 100.

[0052] A same-color ink layer 20, a print layer 30, and, if necessary, a different-color ink layer 40 may be formed in advance on the surface of the resin film 80. As shown in Figure 11, the resin film 80 may be adhered to the light-transmitting substrate 10 via an adhesive layer or an extruded resin laminate 70.

[0053] A polyethylene terephthalate film, a polypropylene film, a polyethylene film, or the like may be used as the resin film 80. As shown in Fig. 11, if necessary, an inner surface resin layer 50 such as a polyethylene film may be further provided on the inner surface 12 of the light-transmitting substrate 10, and an outer surface resin layer 51 such as a polyethylene film may be further provided on the opposite surface 14 of the light-transmitting substrate 10.

[0054] The resin film 80 does not have to be adhered to the light-transmitting substrate 10 via an adhesive layer or an extruded resin laminate 70. For example, a heat-shrinkable resin may be used as the resin film 80, and the resin film 80 on which the same-color ink layer 20 or the like has been formed in advance may be shrunk and attached to the light-transmitting substrate 10 formed into the shape of the container 100.

[0055] In the container 100 of this embodiment, the same-color ink layer 20 has a color difference ΔE * may be configured so that ΔE *is preferably configured to be 3.5 or less. This makes it possible to make the boundary between the light-transmitting substrate 10 and the same-color ink layer 20 in a container such as a beverage container that is held by a general consumer not easily visible.

[0056] In addition, the same-color ink layer 20 has a color difference ΔE * may be configured to be 0.5 or more, and ΔE * is preferably configured to be 1.0 or more. This makes it possible to make the shadow formed by the same-color ink layer 20 clearer when light is irradiated onto the container 100 in a container that is held by a general consumer, such as a beverage container, and to make clear changes in the pattern or the like that appear on the light-transmitting substrate 10 or the printed layer 30.

[0057] Lightness L of the same color ink layer 20 * and chromaticity a * , b * When the same color ink layer 20 is formed on the surface of the light-transmitting substrate 10 and / or the different color ink layer 40, the lightness L of the light-transmitting substrate 10 and the different color ink layer 40 is * and chromaticity a * , b * Therefore, the color difference ΔE between the light-transmitting substrate 10 and the same-color ink layer 20 * may be measured in a state where the same color ink layer 20 is formed on the surface of the light-transmitting substrate 10 and / or on the different color ink layer 40.

[0058] Color difference ΔE between the light-transmitting substrate 10 and the same-color ink layer 20 * may be adjusted by the thickness of the same-color ink layer 20, the composition of the ink layer constituting the same-color ink layer 20, the colorant contained in the ink layer, etc. In addition, in a modified example of the container 100 having the different-color ink layer 40, the color difference ΔE * In addition to / instead of the thickness of the same color ink layer 20, the thickness of the different color ink layer 40, the composition of the ink layer that constitutes the different color ink layer 40, the colorant contained in the ink layer, etc. may be adjusted.

[0059] In the container 100 of this embodiment, a different color ink layer 40 is formed on the surface of a paper light-transmitting substrate 10, and a same color ink layer 20 is formed on the different color ink layer 40, and the color difference ΔE between the light-transmitting substrate 10 and the same color ink layer 20 is * The results of measuring the visibility of the same-color ink layer 20 and the aesthetic appearance of the light-transmitting substrate 10 when irradiated with light are shown in Table 1. In Nos. 1, 2, 3 to 10, the same-color ink layer 20 was formed by printing once, while No. 2' was formed by printing the same-color ink layer 20 twice.

[0060] Color difference ΔE * The measurements were taken using an X-rite eXact colorimeter, with a light source of D50 and a standard observer with a 2-degree field of view, after calibration with a white calibration plate.

[0061] In Table 1, the visibility of the same-color ink layer 20 was evaluated as "Good" when the boundary between the same-color ink layer 20 and the light-transmitting substrate 10 was not clearly visible to the eye of the evaluator, and evaluated as "Excellent" when the same-color ink layer 20 and the light-transmitting substrate 10 were judged to be the same color.

[0062] Furthermore, the aesthetic appearance of the light-transmitting substrate 10 when irradiated with light was evaluated as "Good" when light with an illuminance of 400 to 500 lux was irradiated from the side opposite to the surface on which the same-color ink layer 20 was formed, and when the boundary between the same-color ink layer 20 and the light-transmitting substrate 10 was clearly visible, the aesthetic appearance was evaluated as "Good" when the pattern, etc., was clearly visible down to the fine details.

[0063] [Table 1]

[0064] As shown in Table 1, the color difference between the light-transmitting substrate 10 and the same-color ink layer 20 is expressed as ΔE * By setting the ΔE value to 6.5 or less, preferably 3.5 or less, the boundary between the same-color ink layer 20 and the light-transmitting substrate 10 can be made inconspicuous. *By setting the value of the ratio to be in the range of 0.5 or more, preferably 1.0 or more, the shadow formed by the same color ink layer 20 when irradiated with light can be made clear.

[0065] Next, a description will be given of a method for manufacturing the container 100. Fig. 12 shows an example of a flow for manufacturing the container 100 of this embodiment.

[0066] The method for manufacturing the container 100 of this embodiment includes step S20 of forming the same-color ink layer 20 and step S30 of forming the print layer 30.

[0067] First, in S20, a same-color ink layer 20 patterned in the same color as the light-transmitting substrate 10 is formed on at least one surface of the light-transmitting substrate 10.

[0068] The light-transmitting substrate 10 includes a light-transmitting material, such as paper. Examples of paper that can be used for the light-transmitting substrate 10 include kraft paper, fine paper, construction paper, glassine paper, parchment paper, synthetic paper, white cardboard, manila cardboard, milk carton base paper, cup base paper, and ivory paper.

[0069] The same-color ink layer 20 can be formed by a printing method such as gravure printing, inkjet printing, waterless lithography, resin relief printing, flexographic printing, screen printing, etc. The same-color ink layer 20 may be formed by printing an ink composition that forms the same-color ink layer 20 on the light-transmitting substrate 10 and curing it with heat, light, or the like.

[0070] The ink composition used to form the same-color ink layer 20 has the same color as the light-transmitting substrate 10 when the same-color ink layer 20 is formed. The ink composition may contain a colorant, a resin, a solvent, and other additives. For example, if the light-transmitting substrate 10 is white paper, the ink composition may contain a white pigment such as titanium oxide, zinc oxide, calcium carbonate, kaolin, or barium sulfate as a colorant. If the paper contains colors other than white, the ink composition may also contain pigments other than the white pigment. For example, the ink composition may contain a yellow pigment, a magenta pigment, or the like.

[0071] In S20, the step of forming the same-color ink layer 20 may include a process of printing a pattern multiple times. For example, it may include a process of printing a pattern multiple times using the same printing plate. By printing multiple times using the same printing plate, the same-color ink layer 20 can be made thicker. In this case, the shadow formed by the same-color ink layer 20 when irradiated with light can be made clearer, and changes in the pattern, etc. that appear on the light-transmitting substrate 10 and the printing layer 30 can be made clearer. Different patterns may be printed multiple times to form portions of different thicknesses or gradations in the same-color ink layer 20.

[0072] Next, in S30, a printed layer 30 containing a color different from that of the same-color ink layer 20 is formed on at least one of the surface on which the same-color ink layer 20 is provided and the same-color ink layer 20. The printed layer 30 can be formed by a printing method such as gravure printing, inkjet printing, waterless lithographic printing, resin letterpress printing, flexographic printing, or screen printing. The printed layer 30 may be formed by forming a pattern of an ink composition by printing or the like and curing it with light, heat, or the like.

[0073] The ink composition used to form the printed layer 30 contains a color different from that of the same-color ink layer 20 when the printed layer 30 is formed. A plurality of ink compositions may be used as the ink composition to form the printed layer 30, and the ink composition may contain a colorant, a resin, a solvent, and other additives as necessary. For example, a four-color process ink (yellow, red, indigo, and black) may be used, or a special color ink may be used.

[0074] In the example shown in FIG. 12, for convenience, the explanation is given using "first" and "next," but this does not mean that steps S20 and S30 must be performed in this order.

[0075] For example, when manufacturing the container 100 of the embodiment shown in Figure 11, a printed layer 30 may first be formed on the surface of the resin film 80 in step S30, and then a same-color ink layer 20 may be formed in step S20, and then the resin film 80 may be adhered to the light-transmitting substrate 10 via an adhesive layer or an extruded resin laminate 70.

[0076] Alternatively, the printed layer 30 may be first formed on the surface of the heat-shrinkable resin film 80 in step S30, and then the same-color ink layer 20 may be formed in step S20, after which the printed layer 30 may be shrunk and attached to the light-transmitting substrate 10 formed into the shape of the container 100. For example, a strip-shaped resin film 80 may be wrapped around and shrunk around the light-transmitting substrate 10 formed into a cup or bottle shape, or a cylindrical resin film 80 may be covered and shrunk.

[0077] The method for manufacturing the container 100 may include, in addition to steps S20 and S30, a step of processing the light-transmitting substrate 10. For example, when manufacturing the container 100 of the embodiment shown in Fig. 10, before S20, a step of laminating an inner surface resin layer 50 on the inner surface 12 of the light-transmitting substrate 10 and a step of laminating an outer surface resin layer 51 on the opposite surface 14 of the light-transmitting substrate 10 may be included. Furthermore, after S30, a step of coating an outer surface protective layer 60 on the opposite surface 14 of the printing layer 30 may be included.

[0078] The method for manufacturing the container 100 may include, in addition to steps S20 and S30, a step of molding the container 100. For example, when manufacturing a paper cup as the container 100, steps after processing the light-transmitting substrate 10 in steps S20 and S30 and the step of laminating the inner surface resin layer 50, etc., may include the steps of producing a sector-shaped body blank and a circular bottom blank from the light-transmitting substrate 10, forming the body blank into a truncated cone shape and bonding both side edges to form the body of the container 100, attaching the bottom blank to the lower end opening of the body, and curling the upper end opening of the body.

[0079] 13 shows a modified example of the flow for manufacturing the container 100 of this embodiment. The manufacturing method for the container 100 of this embodiment includes step S20 of forming the same-color ink layer 20, step S30 of forming the printed layer 30, and further includes step S10 of forming a different-color ink layer 40 that is a different color from the same-color ink layer 20 and has at least a portion of the same patterning as the same-color ink layer 20.

[0080] First, in S10, a different color ink layer 40 is formed on at least one surface of the light-transmitting substrate 10. The light-transmitting substrate 10 used is the same as that in the embodiment shown in Fig. 12, and therefore a description thereof will be omitted.

[0081] In S10, the different color ink layer 40 may be formed between the same color ink layer 20 and the light-transmitting substrate 10 on the surface of the light-transmitting substrate 10 on which the same color ink layer 20 is formed. Furthermore, the different color ink layer 40 may be formed on the surface of the light-transmitting substrate 10 opposite to the surface on which the same color ink layer 20 is formed so that the pattern formed in the different color ink layer 40 overlaps the pattern formed in the same color ink layer 20, with the light-transmitting substrate 10 sandwiched between them.

[0082] The different color ink layer 40 can be formed on the light-transmitting substrate 10 by a printing method such as gravure printing, inkjet printing, waterless lithographic printing, resin relief printing, flexographic printing, screen printing, etc. The different color ink layer 40 may be formed by printing an ink composition that forms the different color ink layer 40 on the light-transmitting substrate 10 and curing it with heat, light, or the like.

[0083] The ink composition used to form the different color ink layer 40 is one that will have a different color from the same color ink layer 20 when the different color ink layer 40 is formed. It is preferable to use an ink composition that will make the different color ink layer 40 lower in brightness than the same color ink layer 20. For example, if the same color ink layer 20 is white, a black ink or a gray ink may be used.

[0084] The ink composition forming the different color ink layer 40 may contain a resin, a solvent, and other additives as necessary as colorants. For example, the colorant for black ink may be a black pigment such as carbon black, acetylene black, lamp black, or aniline black. When gray ink is used, the colorant may be a black pigment, a white pigment, a yellow pigment, or the like.

[0085] In S10, the step of forming the different color ink layer 40 may include a process of printing a pattern multiple times. For example, it may include a process of printing a pattern multiple times using the same printing plate. By printing multiple times using the same printing plate, the different color ink layer 40 can be made thicker. In this case, the shadows formed by the different color ink layer 40 when irradiated with light can be made clearer, and changes in the pattern, etc. that appear on the light-transmitting substrate 10 and the printing layer 30 can be made clearer. Different patterns may be printed multiple times to form portions with different thicknesses of the different color ink layer 40 or gradations.

[0086] Next, in S20, the same color ink layer 20 is formed on at least one surface of the light-transmitting substrate 10.

[0087] In S20, the same-color ink layer 20 may be formed on the different-color ink layer 40 on the surface of the light-transmitting substrate 10 on which the different-color ink layer 40 is formed. The same-color ink layer 20 may also be formed on the surface of the light-transmitting substrate 10 opposite to the surface on which the different-color ink layer 40 is formed, so that the pattern formed in the same-color ink layer 20 overlaps the pattern formed in the different-color ink layer 40, with the light-transmitting substrate 10 sandwiched between them. The printing method and ink composition used are the same as those in S20 of the embodiment shown in Fig. 12, and therefore description thereof will be omitted.

[0088] In S20, the same-color ink layer 20 may form at least a portion of a pattern portion 310 that is common to the different-color ink layer 40. The different-color ink layer 40 may form the same pattern as the common pattern portion 310, and the same-color ink layer 20 may form an individual pattern portion 320. Furthermore, the same-color ink layer 20 may be formed to include a pattern other than the same pattern as the common pattern portion 310.

[0089] In S20, the same-color ink layer 20 may be aligned using the pattern of the different-color ink layer 40 as a reference. Because the same-color ink layer 20 and the different-color ink layer 40 are formed in different colors, any misalignment between them can be detected visually, allowing an operator to easily align the printing position and correct any misalignment during printing. In addition, the operator can align the printing position by checking the amount of misalignment based on data captured using a camera and then issuing a command to correct the printing position of the printing press.

[0090] Next, in S30, a printed layer 30 containing a color different from that of the same-color ink layer 20 is formed on at least one of the surface on which the same-color ink layer 20 is provided and on the same-color ink layer 20. The printing method and ink composition used are the same as those in S30 of the embodiment shown in Fig. 12, and therefore a description thereof will be omitted.

[0091] In the example shown in Figure 13, for convenience, the explanation uses "first" and "next," but this does not mean that steps S10 to S30 must be performed in this order.

[0092] For example, when manufacturing the container 100 of the embodiment shown in Figure 11, a printed layer 30 may first be formed on the surface of the resin film 80 in step S30, then a same-color ink layer 20 may be formed in step S20, and then a different-color ink layer 40 may be formed in step S10, and then the resin film 80 may be adhered to the light-transmitting substrate 10 via an adhesive layer or an extruded resin laminate 70.

[0093] Alternatively, the print layer 30 may be formed on the surface of the heat-shrinkable resin film 80 in step S30, then the same-color ink layer 20 may be formed in step S20, and then the different-color ink layer 40 may be formed in step S10, and then the resulting film may be shrunk and attached to the light-transmitting substrate 10 formed into the shape of the container 100. For example, a strip-shaped resin film 80 may be wrapped around the light-transmitting substrate 10 formed into a cup or bottle shape and shrunk, or a cylindrical resin film 80 may be placed over the light-transmitting substrate 10 and shrunk.

[0094] In addition to steps S10 to S30, the method for manufacturing the container 100 may include a step of processing the light-transmitting substrate 10. For example, when manufacturing the container 100 of the embodiment shown in Fig. 10, before S10, the method may include a step of laminating an inner surface resin layer 50 on the inner surface 12 of the light-transmitting substrate 10, and a step of laminating an outer surface resin layer 51 on the opposite surface 14 of the light-transmitting substrate 10. Furthermore, after S30, the method may include a step of coating an outer surface protective layer 60 on the opposite surface 14 of the printing layer 30.

[0095] The method for manufacturing the container 100 may include, in addition to steps S10 to S30, a step of forming the container 100. For example, in the case of manufacturing a paper cup, after processing the base paper in steps S10 to S30 and the step of laminating the inner surface resin layer 50, etc., steps may include a step of producing a sector-shaped body blank and a circular bottom blank from the light-transmitting substrate 10, a step of forming the body of the container 100 by forming the body blank into a truncated cone shape and bonding both side edges, a step of attaching the bottom blank to the lower end opening of the body, a step of curling the upper end opening of the body, etc.

[0096] Although the present invention has been described above using embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. It will be apparent to those skilled in the art that various modifications and improvements can be made to the above embodiments. It is clear from the claims that such modifications and improvements can also be included within the technical scope of the present invention.

[0097] It should be noted that the order of execution of each process, such as operations, procedures, steps, and stages, in the container and container manufacturing method shown in the claims, specification, and drawings, can be realized in any order unless specifically stated as "before," "prior to," etc. Even if the operational flow in the claims, specification, and drawings is described using "first," "next," etc. for convenience, it does not mean that it is essential to perform the process in this order. [Explanation of symbols]

[0098] 10 Light transmitting base material 12 Inner surface 14 opposite side 20 Same color ink layer 30 printing layer 40 Different color ink layer 50 Inner resin layer 51 Outer resin layer 60 Outer protective layer 70 Adhesive layer or extruded resin laminate 80 Resin Film 100 containers 200 light source 210 Irradiation Light 220 Transmitted light 310 Common Pattern Parts 320 individual pattern parts

Claims

1. a light-transmitting substrate having an inner surface that contacts the contents and an opposite surface opposite the inner surface; A color difference ΔE ＊ a patterned same-color ink layer composed of ink layers having a refractive index of 6.5 or less; a printed layer formed on at least one of the surface of the light-transmitting substrate on which the same-color ink layer is provided (excluding the surface of the same-color ink layer) and the same-color ink layer, the printed layer containing a color different from that of the same-color ink layer; A container comprising:

2. The container according to claim 1 , wherein the printed layer is formed on the same color ink layer.

3. The container according to claim 1 or 2, wherein the same-color ink layer and the printed layer are formed on the opposite surfaces of the light-transmitting substrate.

4. 4. The container according to claim 1, further comprising a different color ink layer between the same color ink layer and the light-transmitting substrate, the different color ink layer having a color different from that of the same color ink layer and at least a portion of which has a pattern common to the same color ink layer.

5. 5. The container according to claim 1, further comprising a different color ink layer on the surface of the light-transmitting substrate opposite to the surface on which the same color ink layer is formed, the different color ink layer having a color different from that of the same color ink layer and at least a portion of which has a pattern common to the same color ink layer.

6. The container according to claim 4 or 5, wherein the same-color ink layer and the different-color ink layer have a common pattern portion.

7. the same-color ink layer has the common pattern portion and individual pattern portions, the different color ink layers are formed with the same pattern as the common pattern portion; 7. The container of claim 6.

8. The container according to claim 4 , wherein the different color ink layer has a lower brightness than the same color ink layer.

9. The container of claim 1 , wherein the light-transmitting substrate comprises a white paper substrate and the same-color ink layer comprises a white ink.

10. 2. The container according to claim 1, wherein the color difference between the light-transmitting substrate and the ink layer of the same color is 0.5 or more and 6.5 or less.

11. Container according to any one of claims 1 to 10, wherein the container is a paper cup.

12. A method for manufacturing a container according to any one of claims 1 to 11, comprising the steps of: forming an ink layer of the same color as the light-transmitting substrate and patterned on at least one surface of the light-transmitting substrate; forming a print layer containing a color different from that of the same-color ink layer on at least one of the surface of the light-transmitting substrate on which the same-color ink layer is provided and on the same-color ink layer; A method for manufacturing a container comprising:

13. The method for manufacturing a container according to claim 12 , wherein the step of forming the same color ink layer includes a process of printing a pattern multiple times using the same printing plate.

14. The method for manufacturing a container according to claim 12 or 13, further comprising a step of forming a different color ink layer between the same color ink layer and the light-transmitting substrate, the different color ink layer having a color different from that of the same color ink layer and at least a portion of a pattern common to the same color ink layer.

15. 15. A method for manufacturing a container according to any one of claims 12 to 14, further comprising a step of forming a different color ink layer on the surface of the light-transmitting substrate opposite to the surface on which the same color ink layer is formed, the different color ink layer having at least a portion of a pattern common to the same color ink layer.

16. The method for manufacturing a container according to claim 14 or 15, wherein the same-color ink layers are aligned using the patterns of the different-color ink layers as a reference.

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