Article, laminate, packaging bag and package

Abstract

To provide a laminate capable of acquiring sufficient identification accuracy with respect to individual identification of an identifier including feature point information.SOLUTION: A laminate 1 includes: a base material 2; an identifier 3 formed on a surface 2a of the base material 2; and a diffusion layer 4 laminated on a region including at least the identifier 3 out of the surface 2a of the base material 2. A 60-degree specular glossiness of a surface 4a of the diffusion layer 4 is equal to or less than 45.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an article, a laminate, a packaging bag, and a package.

Background Art

[0002] Patent Document 1 discloses an overprint varnish that can suppress barcode reading errors even when embossing is applied after applying the overprint varnish on a barcode printed on the surface of a glossy substrate. The overprint varnish of Patent Document 1 contains a binder resin and a plurality of types of beads, and the ratio of the average particle diameters of the plurality of types of beads is 1.3 times or more and less than 5 times.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, various identifiers (barcodes, characters, patterns, etc.) printed on an article such as a substrate have individual feature point information. In recent years, it has been considered to acquire an image of an identifier including feature point information by photographing and perform individual identification of the identifier based on the feature points of the feature point information included in the captured image. Individual identification of an identifier using feature point information can be used, for example, for authenticity determination of purchased articles or campaign applications.

[0005] In order to identify an individual using feature point information, it is necessary to extract sufficient feature point information from the captured image of the identifier. However, even if the identifier can be captured, a part of the identifier may be hidden or blurred due to halation in the captured image of the identifier. Such a captured image does not contain sufficient feature point information for individual identification of the identifier, so sufficient identification accuracy for individual identification of the identifier cannot be obtained.

[0006] In view of the above problems, an object of the present invention is to provide an article, a laminate, a packaging bag, and a package that can improve the identification accuracy of individual identification of an identifier including feature point information.

Means for Solving the Problems

[0007] One aspect of the present invention is an article including an article body, an identifier formed on the surface of the article body, and a diffusion layer laminated on at least a region including the identifier on the surface of the article body. The 60-degree specular glossiness of the surface of the diffusion layer is 45 or less.

[0008] One aspect of the present invention is a laminate including a base material, an identifier formed on the surface of the base material, and a diffusion layer laminated on at least a region including the identifier on the surface of the base material. The 60-degree specular glossiness of the surface of the diffusion layer is 45 or less.

[0009] One aspect of the present invention is a packaging bag formed using the laminate.

[0010] One aspect of the present invention is a package including the packaging bag and the contents accommodated in the packaging bag.

Effects of the Invention

[0011] According to the present invention, the identification accuracy of individual identification of an identifier including feature point information can be improved.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Embodiments for Carrying Out the Invention

[0013] Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2. As shown in FIG. 1, the laminate 1 (article) of the present embodiment is formed in a flexible sheet shape. The laminate 1 includes a base material 2 (article main body), an identifier 3, and a diffusion layer 4.

[0014] The base material 2 is formed in a flexible film shape or sheet shape. In FIG. 1, the base material 2 is shown as one layer, but the base material 2 may be configured by laminating a plurality of layers, for example. The base material 2 may include a plastic film made of polyethylene terephthalate (PET), stretched polypropylene (OPP), or the like. Further, the base material 2 may or may not include a foil such as aluminum, a vapor deposition film, a silica vapor deposition film, etc. (hereinafter, collectively referred to as a "metal layer").

[0015] The identifier 3 is formed on the surface 2a of the base material 2. In the present embodiment, the identifier 3 is formed on the surface 2a of the base material 2 by printing. The printed identifier 3 includes individual feature point information. The identifier 3 is preferably recognizable by being imaged by a camera of a smartphone or the like. Examples of such an identifier 3 include a one-dimensional code and a two-dimensional code. The one-dimensional code may be, for example, a JAN code or the like. The two-dimensional code may be, for example, a QR code (registered trademark), a data matrix, or the like. Note that the identifier 3 may be, for example, characters or a pattern. Further, the identifier 3 formed on the surface 2a of the base material 2 is not limited to that by printing, and may be, for example, by embossing or attaching a label.

[0016] The feature point information included in the identifier 3 has feature points. The feature points refer to the features unique to individual identification information that cannot be distinguished by a code reading unit such as a human eye or a scanner, and are the feature points that identify the individual identification information itself. Examples of such feature points include the edge linearity at the end of the individual identification information, the contrast between the light color area and the dark color area, the difference in patterns (extra dark color areas), partial printing blurring or defects, fine patterns due to the printing method, the aspect ratio of the outer shape, and fine feature points such as the arrangement position and the size of the pattern.

[0017] The diffusion layer 4 is laminated on at least the area of the surface 2a of the base material 2 that includes the identifier 3. That is, the diffusion layer 4 may be formed, for example, over the entire surface 2a of the base material 2, or may be formed on a part of the surface 2a of the base material 2. The diffusion layer 4 has light transmissivity. Therefore, the identifier 3 formed on the base material 2 can be visually recognized. Further, the surface 4a of the diffusion layer 4 is formed so as to diffusely reflect (diffusely scatter) light incident within a predetermined angular range with respect to the surface 4a.

[0018] The 60-degree specular glossiness of the surface 4a of the diffusion layer 4 is 45 or less. The 60-degree specular glossiness is defined in JIS Z 8741-1997. Specifically, the 60-degree specular glossiness is obtained by making the reflectance (10%) measured by a light receiver of the light beam (reflected light beam) that is incident from a light source at an incident angle of 60 degrees with respect to the normal of the glass surface (specular surface) having a refractive index of 1.567 and is specularly reflected on the specular surface, 100 (%) which is the reference value. Therefore, the 60-degree specular glossiness of the surface of any article is obtained as follows. The reflectance (measured reflectance) of the object surface is obtained by measuring the reflected light beam with a light receiver when a light beam from a light source is incident on the surface of the article at an incident angle of 60 degrees. Then, the value obtained by multiplying the measured reflectance by 10 is obtained as the 60-degree specular glossiness.

[0019] Further, in this embodiment, when the base material 2 includes a metal layer, the surface roughness Ra of the diffusion layer 4 may be 0.3 μm or more. Further, when the base material 2 does not include a metal layer, the surface roughness Ra of the diffusion layer 4 may be 1.3 μm or more. The surface roughness Ra is the arithmetic mean roughness measured by a method according to JIS B 0601:2013.

[0020] The diffusion layer 4 in this embodiment is a matting agent containing a filler. The filler includes silica. Note that the type of the filler is not limited to silica and may be arbitrary. The coating amount of the matting agent on the surface 2a of the base material 2 is 0.3 g / m 2 or more.

[0021] The laminate 1 of this embodiment further includes a heat-sealing layer 5. The heat-sealing layer 5 is laminated on the back surface 2b of the base material 2 facing the side opposite to the surface 2a of the base material 2. Examples of the heat-sealing layer 5 include heat-sealing varnish (HS varnish), polyethylene (PE), non-stretched polypropylene (CPP), and the like.

[0022] In the laminate 1 configured as described above, when the identifier 3 is a one-dimensional code, when the minimum reflectance in the space (light-colored region such as white) of the one-dimensional code is Rmin and the reflectance in the bar (dark-colored region such as black) of the one-dimensional code is Rmax, Rmin / Rmax in the one-dimensional code is 3.5 or more. Note that Rmin / Rmax is one of the inspection items defined in ISO / IEC15416.

[0023] Further, in the laminate 1 of this embodiment, when the base material 2 does not include a metal layer, the edge contrast of the identifier 3 is 23 or more. Further, when the base material 2 does not include a metal layer, the symbol contrast of the identifier 3 is 43 or more. Edge contrast is the difference between the reflectance in adjacent bars (dark regions) and the reflectance in spaces (light regions) in a one-dimensional code when identifier 3 is a one-dimensional code. Edge contrast can be measured using a verification machine for one-dimensional codes conforming to JIS X 0521-1 and ISO / IEC 15426-2. Symbol contrast is the difference between the maximum reflectance and the minimum reflectance in the scanning reflectance waveform of identifier 3 when identifier 3 is a one-dimensional code or a two-dimensional code having dark regions and light regions. Symbol contrast can be measured using a verification machine for one-dimensional codes or two-dimensional codes conforming to JIS X 0521-1 and ISO / IEC 15426-2.

[0024] The packaging bag 100 shown in FIG. 2 is formed using the laminate 1 shown in FIG. 1. The packaging bag 100 can accommodate contents such as beverages and foods. The packaging bag 100 illustrated in FIG. 2 is a standing pouch, but the mode of the packaging bag 100 using the laminate 1 is not limited to this. Hereinafter, the packaging bag 100 in FIG. 2 will be further described.

[0025] The packaging bag 100 shown in FIG. 2 includes a bag body 10 and a mouth plug portion 20. The bag body 10 is composed of a plurality of film sheets 11 made of the laminate 1. The bag body 10 is formed into a bag shape by overlapping and heat-sealing the peripheries of the film sheets 11 so that the heat-sealing layers 5 (see FIG. 1) of the film sheets 11 face each other. The bag body 10 illustrated in FIG. 2 has a total of three film sheets 11, namely, a first film sheet 11A, a second film sheet 11B, and a third film sheet 11C. These three film sheets 11 may be formed completely separately or may be formed in a row. For example, all three film sheets 11 may be formed in a row, or for example, two film sheets may be formed in a row and one film sheet may be formed separately. When two or three film sheets 11 are formed in a row, the boundary line of the sheet formed in a row may be bent.

[0026] The first film sheet 11A and the second film sheet 11B are formed to have the same shape and the same size in a plan view. The first film sheet 11A and the second film sheet 11B are arranged to overlap with each other such that their heat seal layers 5 face each other. The third film sheet 11C is interposed in a part of the peripheries of the first and second film sheets 11A and 11B in a plan view. The third film sheet 11C is positioned between the first and second film sheets 11A and 11B in a curved state such that the heat seal layer 5 side thereof faces the space between the first and second film sheets 11A and 11B, and the heat seal layer 5 of the third film sheet 11C faces the heat seal layers 5 of both the first film sheet 11A and the second film sheet 11B. Then, the bag body 10 is formed by heat-sealing a first seal portion 12 where the peripheries of the first and second film sheets 11A and 11B overlap, a second seal portion 13 where the peripheries of the first and third film sheets 11A and 11C overlap, and a third seal portion 14 where the peripheries of the second and third film sheets 11B and 11C overlap, respectively.

[0027] The stopper portion 20 is configured to be able to open and close a pouring port for pouring out the contents accommodated in the packaging bag 100. The stopper portion 20 includes a stopper formed in a cylindrical shape with both ends open and connecting the inside and outside of the bag body 10, and a cap 21 for opening and closing the stopper. The stopper portion 20 is welded to the bag body 10 in a state of being sandwiched between these film sheets 11 at a part of the peripheries of the overlapping film sheets 11. In the packaging bag 100 illustrated in FIG. 2, the stopper portion 20 is attached to a portion of the first seal portion 12 (the peripheries of the first and second film sheets 11A and 11B) located on the side opposite to the third film sheet 11C.

[0028] In the packaging bag 100 illustrated in FIG. 2, the identifier 3 is arranged so as to be visible from the outer surface side of the first film sheet 11A made of the diffusion layer 4 (see FIG. 1). The identifier 3 in FIG. 2 is a one-dimensional code, but may be a two-dimensional code, or may be characters, a design, or the like, for example.

[0029] When accommodating contents such as beverages (food) in the packaging bag 100, for example, a part of the periphery of the overlapping film sheets 11 may be left unjoined, and after filling the contents into the packaging bag 100, the unjoined part may be sealed by heat fusion. Also, when accommodating contents in the packaging bag 100, for example, with all the peripheries of the overlapping film sheets 11 joined, after filling the contents into the packaging bag 100 from the mouthplug of the mouthplug part 20, the mouthplug may be closed with the cap 21. By doing so, a package body that accommodates the contents in a sealed state in the packaging bag 100 can be configured.

[0030] In the laminate 1, the packaging bag 100 and other articles of the present embodiment configured as described above, the individual identification of the identifier 3 can be performed, for example, by the following procedure. On the premise of performing the individual identification of the identifier 3, it is assumed that the feature point information (information indicating feature points) extracted from the reference image is stored in the feature point storage unit provided in a predetermined information processing device in advance. The reference image here is an image to be referred to when performing individual identification.

[0031] For example, the identifier 3 attached to the article before shipment of the article (product) is imaged as a reference image. Then, feature points are extracted from the reference image. The method of extracting feature points from the reference image may be arbitrary. For example, it is possible to extract feature points from the reference image using image processing for extracting the contour from the image, machine learning such as deep learning. The feature points extracted from the reference image are stored in the feature point storage unit as quantified feature point data.

[0032] After that, the item is shipped, and the identifier 3 attached to the item is imaged by the user who purchased the item or the like, and the image (identifier image) is transmitted to the information processing device, whereby an application for a campaign or the like is made. In such a case, the individual identification unit provided in the information processing device performs individual identification of the identifier image. If it is determined that the identifier image images the same individual (identifier 3) as the identifier 3 for which the reference image was imaged before shipment, for example, it can be determined that the item purchased by the user is an item shipped through the regular shipping route and has the qualification to apply for the campaign. Alternatively, as an application for a campaign or the like for an item, the identifier 3 attached to the item is imaged as an application image (referred to as a first application image) by the smartphone or the like of the user who purchased the item and transmitted to the information processing device. The feature points of the identifier 3 extracted from the first application image are stored in the feature point storage unit as registered feature point data. Thereafter, if it is determined that the application image used for the application (referred to as a second application image) has the same feature points as the registered feature point data, it can be regarded as having already applied in the application related to the first application image, and the application related to the second application image can be rejected. Of course, the individual identification may be used for purposes other than applying for a campaign.

[0033] When it is shown that the similarity between the feature point data of the identifier 3 and the feature point data of the reference destination is equal to or greater than a predetermined threshold value and they are similar, the individual identification unit determines that the identifier 3 imaged in the identifier image and the identifier 3 imaged in the reference image are the same individual. On the other hand, when it is shown that the similarity between the feature point data of the identifier 3 and the feature point data of the reference destination is less than the predetermined threshold value and they are not similar, the individual identification unit determines that the identifier 3 imaged in the identifier image and the identifier 3 imaged in the reference image are not the same individual.

[0034] As described above, in the laminate 1 of the present embodiment, the diffusion layer 4 is laminated on the region of the surface 2a of the base material 2 that includes the identifier 3, and the 60-degree specular glossiness of the surface 4a of the diffusion layer 4 is 45 or less. Therefore, the light incident on the surface of the laminate 1 composed of the diffusion layer 4 can be effectively diffusely reflected (scattered reflection) on the surface of the laminate 1. For this reason, it is possible to suppress the specular reflection of light on the surface of the laminate 1 composed of the diffusion layer 4. As a result, it is possible to suppress a part of the identifier 3 from being hidden or blurred due to halation in the individual identification information image obtained by imaging the identifier 3. Therefore, it is possible to include sufficient feature point information for identifying the identifier 3 in the individual identification information image, and it is possible to improve the identification accuracy of the individual identification of the identifier 3 including the feature point information. That is, it is possible to obtain sufficient identification accuracy for the individual identification of the identifier 3.

[0035] Further, since the 60-degree specular glossiness of the surface 4a of the diffusion layer 4 is 45 or less, even if the region of the surface 2a of the base material 2 including the identifier 3 is curved in a concave or convex shape due to the curvature of the flexible laminate 1, as described above, it is possible to effectively suppress a part of the identifier from being hidden or blurred due to halation in the individual identification information image obtained by imaging the identifier 3.

[0036] In the laminate 1 of the present embodiment, when the base material 2 includes a metal layer, the surface roughness Ra of the diffusion layer 4 is 0.3 μm or more. When the base material 2 does not include a metal layer, the surface roughness Ra of the diffusion layer 4 is 1.3 μm or more. Thereby, the 60-degree specular glossiness of the surface 4a of the diffusion layer 4 can be made 45 or less.

[0037] In the laminate 1 of the present embodiment, the diffusion layer 4 is a matting agent containing a filler, and the coating amount of the matting agent on the surface 2a of the base material 2 is 0.3 g / m 2 The above is the case. Thereby, when the base material 2 includes a metal layer, the surface roughness Ra of the diffusion layer 4 can be made 0.3 μm or more, and when the base material 2 does not include a metal layer, the surface roughness Ra of the diffusion layer 4 can be made 1.3 μm or more. Also, the 60-degree specular glossiness of the surface 4a of the diffusion layer 4 can be made 45 or less.

[0038] Hereinafter, the laminate according to the present invention will be further described using the first experimental examples (Examples 1 to 4, Comparative Examples 1 to 4). The technical scope of the present invention is not limited in any way by the specific content of the experimental examples.

[0039] <First Experimental Example> 〔Examples 1 to 4〕 In the laminates of Examples 1 to 4, a flexible package containing a plastic film was adopted as the base material in each case. Also, in the laminates of Examples 1 to 4, a barcode (one-dimensional code) was printed on the surface of the base material as an identifier in each case. Further, in the laminates of Examples 1 to 4, as the surface treatment of the flexible package, a diffusion layer made of a matting agent containing a filler was formed on the surface of the base material containing the identifier. The above filler contains silica. In the laminate of Example 1, the coating amount of the matting agent on the surface of the substrate is 1.2 g / m 2 . On the other hand, in the laminates of Examples 2 to 4, the coating amount of the matting agent on the surface of the substrate is 0.3 g / m 2 . In the laminates of Examples 1 to 3, the base material includes an aluminum layer as a metal layer. In the laminate of Example 4, the base material does not include an aluminum layer.

[0040] 〔Comparative Examples 1 to 4〕 The laminate of Comparative Example 1 is the same as the laminate of Example 1 except that there is no diffusion layer (matting agent) on the identifier. The laminate of Comparative Example 2 is the same as the laminate of Example 2 except that there is no diffusion layer (matting agent) on the identifier. The laminate of Comparative Example 3 is the same as the laminate of Example 3 except that there is no diffusion layer (matting agent) on the identifier. The laminate of Comparative Example 4 is the same as the laminate of Example 4 except that there is no diffusion layer (matting agent) on the identifier.

[0041] Regarding the laminates of Examples 1 to 4 and Comparative Examples 1 to 4 described above, the 60-degree specular glossiness of the laminate surface on the surface side of the base material on which the identifier was printed, and the surface roughness Ra of the laminate surface were obtained. The surface roughness Ra of the laminate surface was obtained as follows. Using a microscope (manufactured by High-Lox Co., Ltd., KH-8700), the surface of the light color region (white part) of the one-dimensional code (JAN code) was observed at a magnification of 350 times, and a composite image in the depth direction (composite image from the lower end to the upper end) was created. Using the obtained composite image, the Ra value was measured at 3 points each in the vertical and horizontal directions (6 points in total), and the average value was taken as the surface roughness Ra. The cut-off value was set to 8.0 μm. Note that the surface of the laminate in Examples 1 to 4 is the surface of the diffusion layer.

[0042] Also, for the laminates of Examples 1 to 4 and Comparative Examples 1 to 4, using a barcode verification machine (manufactured by Aenix Co., Ltd., REA VeriCube), the symbol contrast and edge contrast of the identifier that is the barcode, and Rmin / Rmax in the identifier were measured. The components, conditions, and measured values of 60-degree specular gloss, symbol contrast, edge contrast, and Rmin / Rmax in the laminates of Examples 1 to 4 and Comparative Examples 1 to 4 are shown in Table 1.

[0043]

Table 1

[0044] As shown in Table 1, it can be seen that in the laminates of Examples 1 to 4 with a diffusion layer (matting agent), the 60-degree specular gloss of the laminate surface is lower than that of Comparative Examples 1 to 4 without a diffusion layer (matting agent).

[0045] Furthermore, from the results shown in Table 2, when the 60-degree specular gloss of the laminate surface is low as in Examples 1 to 4, there is a tendency for Rmin / Rmax in the identifier to be high. Specifically, in Comparative Examples 1 to 4 with a relatively high 60-degree specular gloss, Rmin / Rmax is as low as 3 or less. On the other hand, in Examples 1 to 4 with a relatively low 60-degree specular gloss, Rmin / Rmax is as high as 3.5 or more. It is considered that the high Rmin / Rmax of 3.5 or more in Examples 1 to 4 is due to the 60-degree specular gloss being 45 or less.

[0046] Furthermore, focusing on the laminates that do not contain an aluminum layer (metal layer) (the laminates of Example 4 and Comparative Example 4), in the laminate of Comparative Example 4, the measured values of symbol contrast were 41 and edge contrast were 22. On the other hand, in the laminate of Example 4, the measured values of symbol contrast were 46 and edge contrast were 25, both of which were higher than those of Comparative Example 4. Higher measured values of symbol contrast and edge contrast mean that it is easier to read the barcode, which is an identifier. That is, it became clear that the laminate of Example 4 is superior to Comparative Example 4 in terms of ease of reading the identifier. It is considered that the symbol contrast being 43 or more and the edge contrast being 23 or more, as in the laminate of Example 4, are due to the 60-degree specular glossiness being 45 or less.

[0047] In the first experimental example, for the laminates of Examples 1 to 4 and Comparative Examples 1 to 4, the probability (false-negative identification error rate, FNIR) that the system could not identify as being the same as the pre-registered identifier was calculated. The specific calculation of the false-negative identification rate was carried out with reference to "Guidance on Individual Management Technology Using Artifact Metrics", [online], January 11, 2022, National Institute of Advanced Industrial Science and Technology, [searched on October 30, 2023], Internet (URL: https: / / www.cpsec.aist.go.jp / achievements / artmet / artmet-guidance-1_0_0.pdf). As a result, in the laminates of Comparative Examples 1 to 4, the false-negative identification rates were all 1.0×10 -17 or more. This is considered to be due to the fact that in the laminates of Comparative Examples 1 to 4, the 60-degree specular glossiness was all 100 or more. It is also considered to be due to the surface roughness Ra of the laminate surface in the laminates of Comparative Examples 1 to 3 containing an aluminum layer (metal layer) being less than 0.3 μm, and the surface roughness Ra of the laminate surface in the laminate of Comparative Example 4 not containing an aluminum layer (metal layer) being less than 1.3 μm.

[0048] On the other hand, in the laminates of Examples 1 to 4, the false rejection identification rates were all 1.0×10 -23 or less. This is presumably because in the laminates of Examples 1 to 4, the 60-degree specular glossiness of the surface of each laminate was 45 or less. Also, it is presumably due to the fact that the surface roughness Ra of the laminate surface in the laminates of Examples 1 to 3 containing an aluminum layer (metal layer) was as high as 0.3 μm or more, and the surface roughness Ra of the laminate surface in the laminate of Example 4 not containing an aluminum layer (metal layer) was 1.3 μm or more. From the above, it has become clear that by laminating a diffusion layer on the surface of a substrate containing an identifier and setting the 60-degree specular glossiness of the surface of the diffusion layer to 45 or less, the identification accuracy of individual identification of the identifier containing feature point information can be improved.

[0049] As described above, the embodiments according to the present invention have been described. However, the present invention is not limited to the above-described embodiments, and can be appropriately modified without departing from the gist thereof.

[0050] The present invention is not limited to the flexible laminate 1, and may be applied to any article. The article may be, for example, a metal container such as a can, a plastic container such as a PET bottle, or a paper container such as a paper pack. The article may include an article body made of a metal container, a plastic container, a paper container, etc., an identifier 3 printed on the surface of the article body, and a diffusion layer 4 laminated on the surface of the article body including the formation region of the identifier 3. The form of the article body is not limited to a film sheet 11, a container (bottle, cup, tank), and forms such as a tray and a tube can also be exemplified.

[0051] In the laminate and article of the present invention, the diffusion layer 4 is not limited to a matting agent containing a filler. The diffusion layer 4 may be, for example, a layer having an uneven shape formed by embossing or the like on the surface of a light-transmissive layer. When the uneven shape is formed on the surface 4a of the diffusion layer 4, the surface roughness Ra may be 0.3 μm or more when the base material 2 of the diffusion layer 4 contains a metal layer, or the surface roughness Ra of the diffusion layer 4 may be 1.3 μm or more when the base material 2 does not contain a metal layer. Further, when the uneven shape is formed on the surface 4a of the diffusion layer 4, the 60-degree specular glossiness of the surface 4a of the diffusion layer 4 may be 45 or less.

Explanation of Signs

[0052] 1 Laminate (article) 2 Base material (article body) 2a Surface of the base material 2 2b Back surface of the base material 2 3 Identifier 4 Diffusion layer 4a Surface of the diffusion layer 4 5 Heat-sealing layer 10 Bag body 20 Plug portion 100 Packaging bag

Claims

1. An article body, An identifier formed on the surface of the article body, A diffusion layer laminated on at least the region including the identifier on the surface of the article body, and An article in which the 60-degree specular glossiness of the surface of the diffusion layer is 45 or less.

2. A base material, An identifier formed on the surface of the base material, A diffusion layer laminated on at least the region including the identifier on the surface of the base material, and A laminate in which the 60-degree specular glossiness of the surface of the diffusion layer is 45 or less.

3. The laminate according to claim 2, wherein the base material includes a flexible plastic film.

4. The base material includes a metal layer, The laminate according to claim 2, wherein the surface roughness Ra of the diffusion layer is 0.3 μm or more.

5. The base material does not include a metal layer, The laminate according to claim 2, wherein the surface roughness Ra of the diffusion layer is 1.3 μm or more.

6. The diffusion layer is a matting agent containing a filler, The coating amount of the matting agent on the surface of the base material is 0.3 g / m ２ or more. The laminate according to claim 2.

7. The laminate according to claim 6, wherein the filler includes silica.

8. The laminate according to claim 2, wherein the identifier is a one-dimensional code.

9. The laminate according to claim 2, wherein the identifier is a two-dimensional code.

10. The laminate according to claim 8, wherein when the minimum reflectance in the space of the one-dimensional code is Rmin and the reflectance in the bar of the one-dimensional code is Rmax, Rmin / Rmax in the one-dimensional code is 3.5 or more.

11. The base material does not contain a metal layer, The laminate according to claim 8, wherein the edge contrast of the identifier is 23 or more.

12. The base material does not contain a metal layer, The laminate according to claim 8 or claim 9, wherein the symbol contrast of the identifier is 43 or more.

13. The laminate according to claim 2, further comprising a heat-sealing layer laminated on the back surface of the base material facing the side opposite to the surface of the base material.

14. A packaging bag formed using the laminate according to claim 13.

15. The packaging bag according to claim 14, further comprising a mouth plug portion.

16. The packaging bag according to claim 14, and a content accommodated in the packaging bag. A package comprising:

Images