Label packaging

Abstract

To provide a label packaging material having been subjected to metallic printing that excels in economy and design.SOLUTION: A label packaging material (1) includes a printed area (R) having been subjected to metallic tone printing, and is attached to an article (100). The printed area (R) is laminated with: a first layer (11) containing metallic pigments; and a second layer (12), which is provided on a surface (11a) configured to be on the side of an article (100) when the label packaging material (1) is attached, of the first layer (11). The second layer (12) contains at least a black pigment and a white pigment, and in the first layer (11), a ratio of an area (R1) where the metallic pigments exist with respect to an area of the printed area (R) is 20% or over and less than 100%.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a label packaging material printed with a metallic tone.

Background Art

[0002] In labels for packaging articles, metallic tone printing may be performed. For example, Patent Document 1 discloses a high-luminance metallic printing shrink label in which a transparent colored ink printing layer representing characters and patterns and a metal particle ink printing layer having metallic luminance are provided on a base film. In the shrink label, the transparent colored ink printing layer is provided on the front side of the label, and the metal particle ink printing layer and the protective layer are laminated in this order on the back side.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Here, as metallic tone printing, for example, silver printing may be performed. Since mainly aluminum flakes are used in the silver ink used for silver printing, light leaks between the aluminum flakes at locations where the aluminum flakes do not overlap in the silver printing layer printed with silver, and the design property of the printed silver may be low. Therefore, in order to realize a highly designed silver color in silver printing, measures such as performing overprinting of silver ink or increasing the ratio of silver pigment (aluminum flakes) are required, which is costly.

[0005] One aspect of the present invention aims to realize a label packaging material printed with metallic printing excellent in economy and design property.

Means for Solving the Problems

[0006] To solve the above problems, a label packaging material according to one aspect of the present invention is a label packaging material for attaching to an article, having a printing area with a metallic finish, wherein the printing area comprises a first layer containing a metallic pigment and a second layer provided on the surface of the first layer that faces the article when the label packaging material is attached to the article, the second layer containing at least a black pigment and a white pigment, and the ratio of the area of ​​the metallic pigment to the area of ​​the printing area in the first layer is 20% or more and less than 100%. [Effects of the Invention]

[0007] According to one aspect of the present invention, it is possible to realize a label packaging material with metallic printing that is economical and aesthetically pleasing. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic cross-sectional view showing an example of the structure of a label packaging material according to the present invention. [Figure 2] This figure shows an example of a binarized image of the label packaging material shown above. [Figure 3] This figure shows the results of the example. [Figure 4] This figure shows some binarized and CCDC images from the examples. [Modes for carrying out the invention]

[0009] [Embodiment] One embodiment of the present invention will be described in detail below. However, the following description is an example of a label packaging material according to the present invention, and the technical scope of the present invention is not limited to the illustrated example.

[0010] (Overview of label packaging materials) Figure 1 is a schematic cross-sectional view showing an example of the configuration of the label packaging material 1 according to the present invention. As shown in Figure 1, the label packaging material 1 has a printing area R and is a label packaging material that is attached to an article 100. The printing area R is printed with a metallic color such as silver or gold.

[0011] Label packaging material 1 is designed with ingenuity to achieve economical and aesthetically pleasing metallic printing in the printing area R. Label packaging material 1 achieves economical and aesthetically pleasing metallic printing by laminating a second layer 12 containing at least black pigment and white pigment onto a first layer 11 provided in the printing area R of the base material 10, such that the ratio of the area where metallic pigment is present to the area of ​​the printing area R when the label packaging material 1 is viewed from above is 20% or more and less than 100%.

[0012] (Basic composition of label packaging) Based on Figure 1, the basic structure of label packaging 1 will be explained. Label packaging 1 is a label packaging material attached to article 100, having a printing area R with metallic-looking printing. Article 100 includes the object of trade (hereinafter referred to as "goods"). Article may be the goods themselves or a container in which the goods are contained. Examples of goods include food, pharmaceuticals, detergents, cosmetics, etc. Furthermore, the container does not necessarily have to contain goods.

[0013] The printing area R refers to the area where the printing layers (first layer 11, second layer 12, and third layer 13) are provided when the label packaging material 1 is viewed from above. Note that the third layer 13 is not mandatory; the label packaging material 1 only needs to have the first layer 11 and the second layer 12. By providing the first layer 11 and the second layer 12, metallic-looking printing is achieved in the printing area R. In the printing area R, the printing layers are formed in a solid or halftone pattern.

[0014] Metallic printing is expressed in colors such as silver, gold, or metallic colors. The metallic printing area (printing area R) of the label packaging material 1 is specified in JIS Z 8729. * a * b* The L value in the color space system (hereinafter simply referred to as the L value) is preferably 45 or more and 63 or less. When the L value of the printing area R is within the above range, the design property of the metallic printing becomes high.

[0015] The label packaging material 1 includes, for example, labels such as shrink labels, wound labels, heat-sensitive labels, stretch labels, tack labels, and in-mold labels, and packaging packages such as shrink packaging, film packaging, and pouches. The label packaging material 1 may be attached to the article 100 by, for example, labelers such as shrink labelers, roll labelers, and tack labelers, or the product may be accommodated in the label packaging material 1 by a packaging machine, a filling machine, or the like. The label packaging material 1 also includes, for example, an overlapping shrink packaging body that is externally attached to a pillow bag for frozen foods or confectionery, a cup noodle, or the like.

[0016] The label packaging material 1 includes a base material 10, a first layer 11, a second layer 12, and a third layer 13. The first layer 11, the second layer 12, and the third layer 13 are provided in the printing area R and are laminated on the base material 10 by a known printing method such as gravure printing, flexographic printing, screen printing, inkjet printing, or offset printing.

[0017] (Base material) For the base material 10, various conventionally known transparent films can be used. As raw materials for the transparent film, for example, polyester resins (such as polyethylene terephthalate resins and polylactic acid resins), styrene resins (such as styrene-butadiene copolymers), olefin resins (such as polyethylene and polypropylene), polyvinyl chloride, etc. can be adopted. The base material 10 is preferably a shrink film.

[0018] When a shrink film is adopted as the base material 10, the heat shrinkage rate of the shrink film when immersed in hot water at 90°C for 10 seconds is preferably 40% or more, and more preferably 50% or more.

[0019] (First layer) The first layer 11 is laminated on the surface 10a of the substrate 10 in the printing area R, on the side facing the article 100 when the label packaging material 1 is attached to the article 100. The first layer 11 contains metallic pigment 2. In other words, the first layer 11 contains a metallic coloring component. The content (by weight) of metallic pigment 2 may be, for example, 15 to 70% of the entire first layer 11, preferably 17 to 60%, and more preferably 20 to 55%.

[0020] The metallic pigment 2 is preferably a silver metallic pigment. If the metallic print on the label packaging 1 is expressed in silver, the first layer 11 contains, for example, aluminum flakes as the metallic pigment 2.

[0021] Aluminum flakes come in two types: ball-milled aluminum paste and vapor-deposited aluminum paste. Ball-milled aluminum paste is produced by crushing aluminum in a ball mill to create a paste. Therefore, ball-milled aluminum paste is close to particles and has thickness. In contrast, vapor-deposited aluminum paste is produced by peeling off aluminum that has been vapor-deposited onto a film, so its thickness is thinner compared to other directions. Using vapor-deposited aluminum paste allows for finer silver printing.

[0022] As described above, the first layer 11 is laminated on the surface 10a of the substrate 10. In other words, when a user looks at the label packaging 1, they will see the metallic pigment of the first layer 11 through the transparent substrate 10. This enhances the perceived brightness of the metallic print as perceived by the user.

[0023] The first layer 11 contains a resin. The resin is, for example, an acrylic resin, a urethane resin, a polyester resin, a cellulose resin, a vinyl chloride resin, a vinyl acetate resin, or a vinyl chloride-vinyl acetate copolymer resin, and a thermoplastic resin is preferred. The second layer 12 and the third layer 13, which will be described later, also contain a resin in the same way as the first layer 11. Furthermore, the resin contained in the first layer 11 is transparent, and more preferably a colorless and transparent resin. The resin content (by weight) in the first layer 11 may be, for example, 30 to 85% of the total first layer 11, preferably 35 to 80%, and more preferably 40 to 75%.

[0024] Furthermore, in the first layer 11, the ratio of the area of ​​the region R1 where the metallic pigment 2 is present (content area ratio) to the area of ​​the printing region R, when the label packaging material 1 is viewed from above, is 20% or more and less than 100%. The first layer 11 is formed by printing metallic ink containing the metallic pigment 2 onto the substrate 10. The above printing includes both solid printing and halftone printing. Solid printing means printing in which ink is applied to the entire printing area without any gaps, and halftone printing means printing in which ink in the form of fine dots is applied to the printing area. In other words, in the case of halftone printing, the first layer 11 is provided intermittently. Therefore, in that case, the region R2 where the metallic pigment 2 does not exist is the region where the first layer 11 is not present, and the region where the metallic pigment 2 is not present in the region where the first layer 11 is present.

[0025] A ratio of 100% of the area of ​​region R1 where metallic pigment 2 exists to the area of ​​the printing region R indicates that, when the label packaging material 1 is viewed from above, metallic pigment 2 is present throughout the entire first layer 11. For example, when a metallic effect is expressed in silver, aluminum flakes are used as metallic pigment 2. As mentioned above, aluminum flakes include ball-milled aluminum paste and vapor-deposited aluminum paste, but in any case, metallic pigment 2 exists in a flake-like form or a shape with a roughly rectangular cross-section (not shown), as shown in Figure 1. Furthermore, since the first layer 11 contains resin, when the label packaging material 1 is viewed from above, the printing region R has a region R1 where metallic pigment 2 exists and a region R2 where metallic pigment 2 does not exist.

[0026] Although Figure 1 shows the metallic pigment 2 not in contact with the substrate 10 or the like in the first layer 11, the metallic pigment 2 may be in contact with the substrate 10 or the second layer 12, and is not limited to the above.

[0027] Figure 2 shows an example of a binarized image of label packaging 1 viewed from above. In Figure 2, the black areas represent region R1 where metallic pigment 2 is present, and the white areas represent region R2 where metallic pigment 2 is not present. Figure 2 shows an example where the ratio of the area of ​​region R1 where metallic pigment 2 is present to the area of ​​the printed region R is 38%.

[0028] Thus, in the printing area R, only a portion of the printing area R, rather than the entire printing area R, is covered with metallic pigment. Therefore, in label packaging material 1, printing costs can be reduced compared to the case where the entire printing area R is covered with metallic pigment.

[0029] (2nd layer) The second layer 12 is provided on the surface 11a of the first layer 11 that faces the article 100 when the label packaging material 1 is attached to the article 100. The second layer 12 contains at least a black pigment and a white pigment. Carbon black is preferred as the black pigment, and titanium dioxide is preferred as the white pigment. It is desirable that the second layer 12 be laminated onto the first layer 11 by solid printing. The content (weight %) of the black pigment is, for example, 0.01 to 15% of the total second layer 12, preferably 0.05 to 10%, and more preferably 0.1 to 7%. The content (weight %) of the white pigment is, for example, 40 to 90% of the total second layer 12, preferably 50 to 85%, and more preferably 55 to 80%. Furthermore, the white pigment:black pigment (weight ratio) is preferably 1000:1 to 10:1.

[0030] In the printing area R, since metallic pigment 2 is not present in area R2, if only the first layer 11 is laminated on the substrate 10 in the printing area R of the label packaging material 1, the area R2 will be transparent, reducing the aesthetic appeal of the metallic print. Therefore, in this embodiment, a second layer 12 containing at least black pigment and white pigment is further laminated on the first layer 11.

[0031] As a result, in the printing area R, the area R2 where metallic pigment 2 is not present is filled with a second layer 12, which is a color close to metallic and contains black and white pigments. In other words, when the label packaging material 1 is viewed from above, the color represented by the second layer 12, which contains black and white pigments, is visible in the area R2 of the printing area R. The color of the second layer 12, which contains black and white pigments, does not have a sense of brightness but has a color close to metallic.

[0032] Therefore, when viewed macroscopically, the label packaging material 1 appears as a highly luminous and aesthetically pleasing metallic print, thanks to the combination of the second layer 12 and the color expressed by the metallic pigment 2 in the first layer 11. As a result, even if there are areas in the printing area R where the metallic pigment 2 is not present, the entire printing area R appears as an aesthetically pleasing metallic print macroscopically, thus enabling metallic printing without compromising aesthetic appeal.

[0033] In other words, by filling the areas R1 where metallic pigment 2 exists within the printing area R with a second layer 12 of a color close to metallic, the printing in the printing area R can be made to appear as if it has high brightness to the user, even if the second layer 12 does not have brightness. As a result, high-brightness metallic printing can be achieved without layering metallic pigment 2, making it possible to create label packaging materials with metallic printing that is economical and aesthetically pleasing.

[0034] Furthermore, for example, if metallic pigment 2 is silver metallic pigment, it is preferable that the second layer 12 be gray. For example, if the first layer 11 contains aluminum flakes as metallic pigment 2, the printed area R will appear silver. By making the second layer 12 gray, which is close to silver, even if there is an area R2 in the printed area R where aluminum flakes are not present, macroscopically the entire printed area R will appear as a silver print with good aesthetic appeal. Thus, silver printing can be achieved without compromising the aesthetic appeal of the silver expression.

[0035] Furthermore, if metallic printing is to be expressed as color metallic, for example, yellow pigment and pigments of each color may be added to the first layer 11 which contains silver metallic pigment. Then, in the second layer 12, in addition to black pigment and white pigment, the same pigments added to the first layer 11 (i.e., yellow pigment and pigments of each color) may be added to express color metallic.

[0036] Alternatively, as another way to express color metallic, a colored transparent layer may be provided between the substrate 10 and the first layer 11, and the substrate 10, the colored transparent layer, the first layer 11 containing silver metallic pigment, and the second layer 12 containing black pigment and white pigment may be provided in this order. This allows the color of the colored transparent layer and the silver metallic of the first layer 11 to be superimposed, resulting in a label packaging material 1 that expresses the color metallic of the colored transparent layer.

[0037] Furthermore, when printing non-color metallic characters or patterns within a silver metallic surface in the printing area R, a colored transparent layer representing the desired characters or patterns may be provided between the substrate 10 and the first layer 11.

[0038] Furthermore, when expressing color metallic characters or patterns within a silver metallic surface in the printing area R, a colored transparent layer representing the desired characters or patterns may be provided between the substrate 10 and the first layer 11. In this case, the area where the transparent colored layer is provided will be color metallic, and the remaining area will be silver metallic.

[0039] The L value of the second layer 12 is preferably between 40 and 95. By setting the L value of the second layer 12 within this range, the color of the second layer 12 becomes closer to a metallic color, thus enabling the creation of a metallic print with superior aesthetic appeal from a macroscopic perspective. Furthermore, the appearance of the silver color can be adjusted by changing the ratio of black and white pigments.

[0040] (3rd layer) The third layer 13 is laminated on the surface 12a of the second layer 12 that faces the article 100 when the label packaging material 1 is attached to the article 100. The third layer 13 contains at least one of a lubricant or a white pigment.

[0041] By positioning the third layer 13 on the side of the label packaging 1 closest to the article 100, the adhesion (scratch resistance) and slipperiness between the label packaging 1 and the article 100 can be improved. For example, if the label packaging 1 is a shrink label, laminating the third layer 13 between the second layer 12 and the article 100 enhances the slipperiness and adhesion between the article 100 and the label packaging 1, allowing the label packaging 1 to be suitably attached to the article 100.

[0042] The medium contained in the third layer 13 includes at least a resin and a lubricant. Furthermore, by including a white pigment in the third layer 13, the opacity in the printing area R can be enhanced. Note that the opacity effect can be achieved even if the third layer 13 is not located on the side closest to the article 100 in the label packaging material 1. In other words, in the above embodiment, the first layer 11 and the second layer 12 are provided on the back side (article 100 side) of the base material 10, but the first layer 11 and the second layer 12 may both be on the front side of the base material 10 (the side opposite to the side where the article 100 is located relative to the base material 10). Moreover, the first layer 11 may be provided on the front side of the base material 10 and the second layer 12 may be provided on the back side of the base material 10.

[0043] Furthermore, if both the first layer 11 and the second layer 12 are on the surface side of the substrate 10, an opaque film may be used as the substrate 10. The raw materials of the opaque film may be the same as those of the transparent film described above, or they may be paper. A white opaque film is preferred.

[0044] [Variation] Modifications of the present invention are described below. For the sake of clarity, components having the same function as those described in the above embodiments will be denoted by the same reference numerals, and their descriptions will not be repeated.

[0045] As mentioned above, the third layer 13 is not essential in the label packaging material 1, and a sealant layer, adhesive layer, etc. may be provided instead of the third layer 13.

[0046] [Examples] Hereinafter, it will be described in detail by examples together with comparative examples. One example of the present invention will be described below. The L value, binary image, and transmission density shown in this example are values or images obtained by the following methods.

[0047] <L value> For the samples obtained in each example, the L value was measured using a spectrophotometer densitometer (manufactured by Nippon Handa Kikai Co., Ltd., product name "X-RITE 900") conforming to JIS Z8729. The measurement was performed by placing the sample on a white mount paper with an L value of 97.0.

[0048] <Transmission density> For the samples obtained in each example, the light transmittance was measured using a black-and-white transmission densitometer (manufactured by Ihara Electronics Industry Co., Ltd., product name "Ihac-T5") and used as the transmission density.

[0049] <Binary image The samples obtained in each example were magnified 2000 times by SEM (scanning electron microscope), the image of the surface of the sample was read, the read image was captured by a computer, and a binary image was obtained by binarizing it with image analysis software "Image J". For the determination of the threshold value, the Otsu method (discriminant analysis method) was used. The reading conditions were as follows: using an electron microscope "Miniscope(R)TM3030Plus", setting the acceleration voltage to 15.0 kV, and performing reflection electron observation.

[0050] Note that the binary image is an image of the area of the label packaging material 1 in a state where the first layer 11 and the second layer 12, or the first layer 11, the second layer 12, and the third layer 13 are printed on the base material 10.

[0051] Also, in each example, the metallic print was silver, and the printing method for printing the first layer 11, the second layer 12, and the third layer 13 on the base material 10 was gravure printing.

[0052] (Example 2.1) In the label packaging material 1 shown in Figure 1, silver ink B1 (referred to as silver B1 in the table) was printed as the first layer 11, and gray ink H1 (referred to as gray H1 in the table) was printed as the second layer 12.

[0053] Table 1 below shows the weight percentage ratios of each ink. Table 2 below shows the cut rates of each silver ink. The cut rates in Table 2 represent the proportion of medium ink (indicated as medium in the table) added to silver ink B (indicated as silver B in the table) or silver ink M (indicated as silver M in the table) from Table 1. As shown in Table 2, silver ink B1 was produced by adding 30g of medium ink to 100g of silver ink B from Table 1.

[0054] [Table 1]

[0055] [Table 2]

[0056] This section describes silver ink B. As shown in Table 1, silver ink B was produced using ball-milled aluminum paste as the pigment, with a weight ratio of pigment:resin / other solids:solvent of 15:15:70. Note that for each ink in Table 1, the solvent is removed during printing, so after printing, the pigment and resin / other solids remain.

[0057] The resins listed in Table 1 include, for example, acrylic thermoplastic resins, urethane thermoplastic resins, polyester thermoplastic resins, cellulose thermoplastic resins, vinyl chloride thermoplastic resins, vinyl acetate thermoplastic resins, or vinyl chloride-vinyl acetate copolymer thermoplastic resins, or mixtures thereof. The other solid components in Table 1 include, for example, lubricants such as polyethylene wax, defoamers, dispersants, and anti-settling agents.

[0058] Furthermore, the solvents listed in Table 1 include, for example, ester solvents such as methyl acetate, butyl acetate, and n-propyl acetate; alcohol solvents such as IPA (isopropylacetic acid) and methanol; ketone solvents such as MEK (methyl ethyl ketone); aromatic solvents such as toluene; or mineral solvents.

[0059] Furthermore, as shown in Table 1, the medium ink contained no pigment, only resin, other solids, and a solvent, and was produced with a resin / other solids:solvent ratio of 15:85 by weight.

[0060] Table 3 below shows the weight ratio of the gray ink formulation, and Table 4 below shows the L value and transmittance of the gray ink.

[0061] [Table 3]

[0062] [Table 4]

[0063] As shown in Table 3, gray ink H1 was produced by mixing white ink (labeled as white in the table) and black ink (labeled as black in the table) in a ratio of white ink to black ink of 80:1. Furthermore, as shown in Table 4, gray ink H1 had an L value of 88.3 and a transmittance of 0.31.

[0064] The white and black inks are described below. As shown in Table 1, the white ink was produced using titanium dioxide as the pigment, with a weight ratio of pigment:resin / other solids:solvent of 35:15:50. The black ink was produced using carbon black as the pigment, with a weight ratio of pigment:resin / other solids:solvent of 10:15:75.

[0065] In Example 2.1, a cohesive metallic print was visible on the label packaging material 1. The results of the example are shown in Figure 3. In the appearance evaluation in Figure 3, A indicates that the metallic print on the label packaging material had a cohesive appearance, and B indicates that it did not.

[0066] (Example 2.2) In Example 2.2, label packaging material 1 was prepared by printing silver ink B1 as the first layer 11 and gray ink H2 (referred to as gray H2 in the table) as the second layer 12. Gray ink H2 was produced by mixing white ink and black ink in a ratio of white ink:black ink of 80:5, as shown in Table 3. Gray ink H2 had an L value of 70.5 and a transmittance density of 0.45, as shown in Table 4.

[0067] In Example 2.2, a consistent metallic-looking print was visible on the label packaging material 1. The results of the example are shown in Figure 3. In addition, a binarized image and a CCDC (Continuous Change Detection and Classification) image of a portion of Example 2.2 are shown in Figure 4. In the CCDC image, the lighter colored area is region R1, and the darker colored area is region R2. The content area ratio of Example 2.2 in Figure 4 was 54%.

[0068] (Example 2.3) In Example 2.3, label packaging material 1 was prepared by printing silver ink B1 as the first layer 11 and gray ink H3 (referred to as gray H3 in the table) as the second layer 12. Gray ink H3 was produced by mixing white ink and black ink in a ratio of white ink:black ink of 80:10, as shown in Table 3. Gray ink H3 had an L value of 60 and a transmittance density of 0.55, as shown in Table 4.

[0069] In Example 2.3, a consistent metallic-looking print was visible on the label packaging material 1. The results of the example are shown in Figure 3.

[0070] (Example 2.4) In Example 2.4, label packaging material 1 was prepared by printing silver ink B1 as the first layer 11 and gray ink H4 (referred to as gray H4 in the table) as the second layer 12. Gray ink H4 was produced by mixing white ink and black ink in a ratio of white ink:black ink of 80:15, as shown in Table 3. Gray ink H4 had an L value of 54.1 and a transmittance density of 0.6, as shown in Table 4.

[0071] In Example 2.4, a consistent metallic-looking print was visible on the label packaging material 1. The results of the example are shown in Figure 3.

[0072] (Example 2.5) In Example 2.5, label packaging material 1 was prepared by printing silver ink B1 as the first layer 11 and gray ink H5 (referred to as gray H5 in the table) as the second layer 12. Gray ink H5 was produced by mixing white ink and black ink in a ratio of white ink:black ink of 80:20, as shown in Table 3. Gray ink H5 had an L value of 48.4 and a transmittance density of 0.68, as shown in Table 4.

[0073] In Example 2.5, a metallic-looking print with a cohesive appearance was visible on the label packaging material 1. The results of the example are shown in Figure 3.

[0074] (Example 2.6) In Example 2.6, label packaging material 1 was prepared by printing silver ink B1 as the first layer 11 and gray ink H6 (referred to as gray H6 in the table) as the second layer 12. Gray ink H6 was produced by mixing white ink and black ink in a ratio of white ink:black ink of 150:1, as shown in Table 3. Gray ink H6 had an L value of 90.7 and a transmittance density of 0.29, as shown in Table 4.

[0075] In Example 2.6, a metallic-looking print with a cohesive appearance was visible. The results of the example are shown in Figure 3.

[0076] (Example 3.1) In Example 3.1, the label packaging material 1 was created by printing silver ink B1 as the first layer 11, gray ink H2 as the second layer 12, and white ink as shown in Table 1 as the third layer 13.

[0077] In Example 3.1, a metallic-looking print with a cohesive appearance was visible on the label packaging material 1. Furthermore, it was confirmed that printing white ink as the third layer 13 improved the slipperiness. The results of the example are shown in Figure 3.

[0078] (Example 3.2) In Example 3.2, label packaging material 1 was created by printing silver ink B1 as the first layer 11, gray ink H2 as the second layer 12, and the medium ink shown in Table 1 as the third layer 13. The medium ink of the third layer 13 contained a lubricant.

[0079] In Example 3.2, a metallic-looking print with a cohesive appearance was visible on the label packaging material 1. Furthermore, it was confirmed that printing a medium ink as the third layer 13 improved scratch resistance and slipperiness. The results of the example are shown in Figure 3.

[0080] (Example 5.1) In Example 5.1, label packaging material 1 was prepared by printing silver ink B2 (referred to as silver ink B2 in the table) as the first layer 11 and gray ink H2 as the second layer 12. Silver ink B2 was produced by adding 60g of medium ink to 100g of silver ink B from Table 1, as shown in Table 2.

[0081] In Example 5.1, a consistent metallic-looking print was visible on the label packaging material 1. The results of the example are shown in Figure 3. In addition, binarized images and CCDC images of a portion of Example 5.1 are shown in Figure 4. The content area ratio of Example 5.1 was 52%.

[0082] (Example 5.2) In Example 5.2, label packaging material 1 was created by printing silver ink B3 (indicated as silver B3 in the table) as the first layer 11 and gray ink H2 as the second layer 12. Silver ink B3 was produced by adding 90g of medium ink to 100g of silver ink B from Table 1, as shown in Table 2.

[0083] In Example 5.2, a consistent metallic-looking print was visible on the label packaging material 1. The results of the example are shown in Figure 3. In addition, binarized images and CCDC images of a portion of Example 5.2 are shown in Figure 4. The content area ratio of Example 5.2 was 38%.

[0084] (Example 5.3) In Example 5.3, label packaging material 1 was created by printing silver ink B4 (indicated as silver ink B4 in the table) as the first layer 11 and gray ink H2 as the second layer 12. As shown in Table 2, silver ink B4 was created by using silver ink B as is, without diluting it with medium ink, as shown in Table 1.

[0085] In Example 5.3, a consistent metallic-looking print was visible on the label packaging material 1. The results of the example are shown in Figure 3. In addition, binarized images and CCDC images of a portion of Example 5.3 are shown in Figure 4. The content area ratio of Example 5.3 was 67%.

[0086] (Example M-2.1) In Example M-2.1, the label packaging was created by printing silver ink M (referred to as "silver ink M" in the table) as the first layer 11, and gray ink H1 as the second layer 12. As shown in Table 1, silver ink M was produced using vapor-deposited aluminum paste as the pigment, with a pigment:resin / other solids:solvent ratio of 1.5:5:93.5 by weight. Furthermore, as shown in Table 2, silver ink M was used as is, without diluting it with medium ink, as shown in Table 1.

[0087] In Example M-2.1, a consistent metallic-looking print was visible on the label packaging material 1. The results of the example are shown in Figure 3.

[0088] (Example M-2.2) In Example M-2.2, the label packaging material 1 was created by printing silver ink M as the first layer 11 and gray ink H2 as the second layer 12.

[0089] In Example M-2.2, a consistent metallic-looking print was visible on the label packaging material 1. The results of the example are shown in Figure 3. In addition, binarized images and CCDC images of a portion of Example M-2.2 are shown in Figure 4. The content area ratio of Example M-2.2 was 84%.

[0090] (Example M-2.3) In Example M-2.3, label packaging material 1 was created by printing silver ink M as the first layer 11 and gray ink H3 as the second layer 12. In Example M-2.3, a consistent metallic-looking print was visible on the label packaging material 1. The results of the example are shown in Figure 3.

[0091] (Comparative Example 1.1) In Comparative Example 1.1, label packaging material 1 was created by printing silver ink B1 as the first layer 11 and white ink from Table 1 as the second layer 12. In Comparative Example 1.1, the metallic print on the label packaging material 1 lacked a sense of unity. It is presumed that the large difference in color between the silver of the first layer 11 and the white of the second layer 12 made the white stand out, resulting in a lack of unity. The results of the example are shown in Figure 3.

[0092] (Comparative Example 2.7) In Comparative Example 2.7, label packaging material 1 was prepared by printing silver ink B1 as the first layer 11 and black ink as shown in Table 1 as the second layer 12. As shown in Table 4, the black ink had an L value of 15.5 and a transmittance density of 0.93. In Comparative Example 2.7, the appearance of label packaging material 1 was darker, and the aesthetic appeal of the metallic print was reduced. The results of the examples are shown in Figure 3.

[0093] (Comparative Example 2.8) In Comparative Example 2.8, the label packaging material 1 consisted only of the first layer 11, and silver ink B1 was printed on the first layer 11. In Comparative Example 2.8, the back of the label packaging material 1 was visible, resulting in a reduced aesthetic appeal of the metallic print. The results of the examples are shown in Figure 3.

[0094] (Results of the Examples and Comparative Examples) As shown in Figure 3, it was confirmed that printing silver ink as the first layer 11 and gray ink as the second layer 12 creates a unified metallic look for the label packaging material 1.

[0095] Furthermore, it was confirmed that a sense of unity was achieved in metallic-toned printing at the respective area content ratios of 54%, 52%, 38%, 67%, and 84% in Examples 2.2, 5.1 to 5.3, and M-2.2, where the material was present at 20% or more and 100%.

[0096] Furthermore, as shown in Figure 3, in the embodiment where the metallic-looking print had a cohesive appearance, it was confirmed that the L value of the label packaging material 1 generally fell within the range of 45 to 63.

[0097] Furthermore, for example, if label packaging material 1 is created by printing the first layer 11 with silver ink B and the second layer 12 with silver ink B, it will result in a highly luminous metallic print, but the cost will be high, solvent components of the ink will easily remain, and adhesion to the item 100 will be poor.

[0098] According to the configuration of the present invention, it is possible to achieve highly aesthetic metallic-looking printing while reducing the amount of metallic pigment used, thus enabling the production of high-quality products with fewer resources. Such effects can contribute, for example, to achieving Goal 12 of the Sustainable Development Goals (SDGs) advocated by the United Nations.

[0099] 〔summary〕 A label packaging material (1) according to embodiment 1 of the present invention is a label packaging material to be attached to an article (100) having a printed area (R) with a metallic finish, wherein the printed area comprises a first layer (11) containing a metallic pigment and a second layer (12) provided on the surface (11a) of the first layer that faces the article when the label packaging material is attached to the article, the second layer contains at least a black pigment and a white pigment, and in the first layer, the ratio of the area of ​​the area where the metallic pigment is present (R2) to the area of ​​the printed area is 20% or more and less than 100%.

[0100] According to the above configuration, the ratio of the area where metallic pigment is present in the first layer to the area of ​​the printed metallic-looking area of ​​the label packaging is between 20% and 100%. If the ratio of the area where metallic pigment is present in the first layer is less than 20%, the perceived brightness will be low. Also, because the above ratio is less than 100%, only a portion of the printed area, rather than the entire printed area, is covered with metallic pigment. This allows for maintaining the perceived brightness of the metallic print while reducing printing costs compared to cases where the entire printed area is covered with metallic pigment.

[0101] Furthermore, a second layer is laminated to the article-side surface of the first layer, and the second layer contains at least black and white pigments. Therefore, areas in the printing region where metallic pigments are not present are filled in with the second layer, which contains black and white pigments and has a color close to metallic. As a result, even if there are areas in the printing region where metallic pigments are not present, the entire printing region appears to be a well-designed metallic print on a macroscopic level, thus enabling metallic printing without compromising the design quality of the metallic expression. Consequently, a metallic printed label packaging material with excellent cost-effectiveness and design can be realized.

[0102] The label packaging material (1) according to aspect 2 of the present invention is, in aspect 1 above, the L of the second layer (12) * a * b * The L value when expressed in a color system may be between 40 and 95.

[0103] According to the above configuration, by setting the L value of the second layer to between 40 and 95, the color of the second layer (12) becomes closer to a metallic color, thus enabling the creation of a metallic print with superior aesthetic appeal from a macroscopic perspective.

[0104] In the label packaging material (1) according to embodiment 3 of the present invention, in embodiment 1 or 2 above, the metallic pigment (2) may be a silver metallic pigment, and the second layer (12) may be gray.

[0105] With the above configuration, since the metallic pigment in the first layer is silver metallic pigment, the printed area will appear silver. Furthermore, since the second layer is gray, which is a color close to silver, even if there are areas in the printed area where silver metallic pigment is not present, macroscopically the entire printed area will appear as a well-designed silver print. Therefore, silver printing can be achieved without compromising the aesthetic appeal of the silver color. As a result, a label packaging material with excellent cost-effectiveness and aesthetic appeal can be realized.

[0106] In the label packaging material (1) according to embodiment 4 of the present invention, when the label packaging material is attached to the article (100) in any of embodiments 1 to 3 above, a third layer (13) is laminated on the side (12a) of the second layer (12) that faces the article (100), and the third layer may contain at least one of a lubricant or a white pigment.

[0107] According to the above configuration, the third layer can protect the label packaging material itself (for example, the first and second layers). Furthermore, if the third layer contains a white pigment, the opacity can be improved. For example, if the label packaging material is a shrink label, by laminating the third layer between the second layer and the article, specifically so that it is located on the side of the label packaging material closest to the article, the label packaging material can be protected, the slipperiness and adhesion between the article and the label packaging material can be improved, and the label packaging material can be suitably attached to the article.

[0108] The present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in each embodiment and example are also included within the technical scope of the present invention. [Explanation of Symbols]

[0109] 1. Label packaging 2. Metallic pigments 10 Base material 11 1st layer 11a The side facing the article in the first layer 12 2nd layer 12a The side facing the article in the second layer 13 3rd layer R print area R1 Region where metallic pigment is present 100 goods

Claims

1. A label packaging material for attaching to an article, having a printing area with a metallic finish, In the aforementioned printing area, A first layer containing metallic pigment, When the label packaging material is attached to the article, the first layer is laminated with a second layer which is provided on the surface facing the article, The second layer comprises at least a black pigment and a white pigment, A label packaging material in which, in the first layer, the ratio of the area of ​​the area where the metallic pigment is present to the area of ​​the printing area is 20% or more and less than 100%.

2. The second layer L ＊ a ＊ b ＊ The label packaging material according to claim 1, wherein the L value when expressed in a color system is 40 or more and 95 or less.

3. The aforementioned metallic pigment is a silver metallic pigment. The label packaging material according to claim 1, wherein the second layer is gray.

4. When the label packaging material is attached to the article, the third layer is laminated on the side of the second layer that faces the article. The label packaging material according to claim 1, wherein the third layer contains at least one of a lubricant or a white pigment.

Images