packaging bags

Abstract

To provide a packaging bag allowing enjoying pleasure different from article storing, after taking out a content.SOLUTION: A packaging bag 1 has a front part 10 and a rear part continued to the front part, and is opened upward. The front part has a window part 22 including multiple windows at a lower part, and a low transmission part 21 formed around the windows and having a lower visible light transmission than the window part. A projection region reflecting light coming from the window part is formed at a part overlapping at least a part of the window part and the low transmission part in the front view of the packaging bag, out of the rear part.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a packaging bag. [Background technology]

[0002] BACKGROUND ART Various items including food are distributed in packaging bags made of resin films. There are many known types of resin films that make up packaging bags, including transparent ones, opaque ones with a printed layer of a pattern or the like, and ones with an aluminum vapor deposition film that is opaque and has gas barrier properties.

[0003] Patent Document 1 describes forming a transparent portion of the front sheet portion having a decorative surface to serve as a window for checking the remaining amount, thereby making it possible to basically make the packaging bag opaque while still allowing the contents inside to be checked. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Utility Model Registration No. 3185323 Summary of the Invention [Problem to be solved by the invention]

[0005] In the case of food products, sales promotions are sometimes carried out by offering limited-time or seasonal lineups. In this case, the promotion effect can be further improved if the packaging bag is equipped with a mechanism to increase purchasing motivation, but the remaining amount confirmation window described in Patent Document 1 does not have any special function other than to check the contents and display the type of contents, so such an effect cannot be expected.

[0006] An object of the present invention is to provide a packaging bag that can be enjoyed in a way other than for storing items after the contents have been removed. [Means for solving the problem]

[0007] The present invention is a packaging bag having a front portion and a rear portion connected to the front portion, and having an opening at the top. The front part has a window part including a plurality of windows at the bottom, and a low transmittance part formed around the windows and having a visible light transmittance lower than that of the window part. The film is configured without including a metal vapor deposition layer. A projection area having metallic luster that reflects light incident through the window portion is formed in a portion of the rear portion that overlaps with at least a part of the window portion and the low transmittance portion when viewed from the front of the packaging bag. [Effects of the Invention]

[0008] The packaging bag according to the present invention can be enjoyed in a way different from storing items after the contents are removed. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a front view showing a packaging bag according to one embodiment of the present invention. [Figure 2] FIG. [Figure 3] 10A and 10B are diagrams showing the operation of the packaging bag when in use. [Figure 4] 10A and 10B are diagrams showing other operations when using the packaging bag. [Figure 5] 10A and 10B are diagrams showing other operations when using the packaging bag. DETAILED DESCRIPTION OF THE INVENTION

[0010] An embodiment of the present invention will be described with reference to FIGS. 1 is a front view showing a packaging bag 1 according to this embodiment. The packaging bag 1 is made of a resin film and has an opening at the top. After the target article is placed inside the packaging bag 1, the opening is sealed and the bag is distributed.

[0011] The packaging bag 1 has a front portion 10 and a rear portion 40. The front portion 10 and the rear portion 40 may be formed from separate resin films, or the front portion 10 and the rear portion 40 may be formed by folding a single resin film. As the resin film, for example, a laminate consisting of a base film and a sealant layer can be used.

[0012] There are no particular restrictions on the material of the base film, and various resin films such as oriented polypropylene film (OPP), polyethylene terephthalate film (PET), and oriented polyamide film (ONy) can be used. The base film may be provided with a gas barrier layer to reduce the transmission of oxygen and water vapor, such as a transparent inorganic compound vapor deposition layer or a transparent barrier coating layer with excellent gas barrier properties. Also, a metal vapor deposition layer may be provided on the base film except for the window portion 22 described below.

[0013] The sealant layer can be made from low-density polyethylene film (LDPE), unstretched polypropylene film (CPP), or linear low-density polyethylene film (L-LDPE), which are commonly used in packaging bags.

[0014] The base film and the sealant layer can be joined by various known methods such as dry lamination using an adhesive or non-solvent lamination. When the product to be stored is food, non-solvent lamination is preferred. Alternatively, a sealant layer may be formed by extrusion coating a low-density polyethylene resin or a polypropylene resin onto a substrate film. Specific examples of the resin film include the following structures. OPP (10-40μm) / Non-solvent adhesive / CPP (10-40μm) PET (12-25μm) / Dry lamination adhesive / L-LDPE (40-80μm)

[0015] As a method for joining the resin films to form the packaging bag 1, heat fusion using a sealant layer is a simple method.

[0016] The front part 10 has an upper first region 11 and a lower second region 20. The second region continues to the vicinity of the lower end of the packaging bag 1, and may reach the lower end.

[0017] In the front part 10, a print layer is formed on the rear surface (rear face) that constitutes the inner surface of the packaging bag 1, for applying a design, letters, etc. to the front part. There are no particular limitations on the form of the printing layer in first area 11, and any desired display such as a photograph or picture of the stored item, product name, etc. The printing layer may be provided on the entire back surface corresponding to first area 11, or on only a portion thereof, but from the perspective of how to enjoy it, which will be described later, it is preferable that the printing layer be provided on the entire surface.

[0018] The second region 20 has a low-transmittance portion 21 on which a printed layer is applied and a window portion 22 on which no printed layer is formed. The window portion in the present invention is configured to include a large number of small windows that are not individually capable of providing sufficient visibility inside, and a low-transmittance portion is located around each window. In this embodiment, the window portion 22 is configured so that the multiple windows collectively display a snowy night cityscape, but this is just one example, and the window portion can be configured to display any desired design. The print layer that forms the low transmittance portion 21 can be formed by printing, for example, gold / white / gold inks in this order, excluding the area that will become the window portion. The low transmittance portion 21 and the window portion 22 have significantly different visible light transmittances, and the visible light transmittance of the window portion 22 is significantly higher than that of the low transmittance portion 21. In one example, the visible light transmittance of the low transmittance portion 21 measured in accordance with JIS K 7375 is 30% or less, and the visible light transmittance of the window portion 22 is 80% or more.

[0019] 2 is a front view of the rear portion 40. A printed layer is formed on the front surface (front face) that constitutes the other inner surface of the packaging bag 1. As a result, the rear portion 40 is configured to be almost entirely opaque. A printed layer formed on the rear portion 40 defines a certain area from the bottom end as a projection area 41. In one example, the printed layer of the projection area is a full-surface print with low visible light transmittance. The color of the projection area is preferably dark, and may have a metallic luster. There are no particular limitations on the form of the printing layer other than the projection area, and it may be the same as the projection area, or it may be different, including various displays related to the target article.

[0020] The dimensions and shape of the projected area 41 are set so that it overlaps with 80% or more of the first area 11 when viewed from the front of the packaging bag 1. Ideally, it is preferable that the projected area 41 overlaps with the entire first area 11, and the projected area 41 may be larger than the first area 11.

[0021] The operation of the packaging bag 1 of this embodiment configured as above when in use will be described. After opening, the packaging bag 1 is emptied by consuming the target article, etc., and the opening is opened, and the front portion 10 and the rear portion 40 are spaced apart to some extent.

[0022] When a user looks into the packaging bag 1 with the front part 10 facing a light source in the room, light from the light source enters the packaging bag 1 through the window part 22, but most of the light is blocked by the low transmittance part 21 and does not enter the packaging bag 1. This contrast makes the window part 22 appear to be shiny. Furthermore, part of the light incident through window 22 is reflected by projection area 41 and shines dimly in a shape corresponding to window 22. As a result, as shown in Figure 3, the user can enjoy a panoramic view as if the upper view shown by window 22 is being projected onto the water surface, with the boundary between front section 10 and rear section 40 serving as the horizon.

[0023] Another method of using the packaging bag 1 is shown in Figure 4. When the packaging bag 1 is taken into a dark room and a light source such as a smartphone or a light bulb is placed inside the packaging bag 1 with the front part 10 facing the wall, a glowing image corresponding to the window part 22 can be projected onto the wall, as shown in Figure 4. When a directional light source is rotated inside the packaging bag 1, the projected image can also be moved on the wall.

[0024] Another way of using the packaging bag 1 is shown in Figure 5. The second region 20 is cut out from the packaging bag 1, and the left and right ends are joined to form a cylindrical shape. By placing this so as to surround the periphery of a light source, the second region 20 can be used as a simple lantern shade. In this case, as shown in Figure 5, the upper edge of the cut-out second region may be made wavy to create a stylish lantern shade. Figure 5 shows an example in which the searchlight of a smartphone Sp is used as a light source. The use of the second region 20 as a lantern shade is preferably performed when the low transmittance portion 21 has a certain visible light transmittance, even though it is low. For example, it is preferable that the visible light transmittance of the low transmittance portion is 15% or more. However, care should be taken because if the visible light transmittance of the low transmittance portion is too high, visibility may deteriorate in the use shown in FIG. 3.

[0025] As described above, the packaging bag 1 of this embodiment can entertain the user and those around them in various ways even after it has completed its original purpose of storing the target item. Therefore, by introducing these ways of enjoying the bag, it is possible to increase consumer purchasing motivation and contribute to improving the sales promotion effect of the target item.

[0026] Although one embodiment of the present invention has been described, the specific configuration is not limited to this embodiment, and configuration changes and combinations within the scope of the gist of the present invention are also included. Some examples of changes are shown below, but these are not all inclusive, and other changes are also possible. Two or more of these changes may be combined as appropriate.

[0027] The window portion does not necessarily have to be colorless and transparent, and may be colored and transparent, as long as it has a visible light transmittance that is sufficiently higher than that of the low transmittance portion. Methods for making the window portion colored and transparent include providing a printed layer with a transparent colored ink, and adding a colorant to the base film or sealant layer to the extent that transparency is not impaired. Furthermore, each window of the window section may have a different color or may have a different type of color.

[0028] There are no particular limitations on the external shape of the packaging bag according to the present invention, and it may be one having a zipper that makes the opening resealable, or a gusseted bag with gussets on the sides, but from the viewpoint of optimizing the panoramic view described above, it is preferable that it is not one that has a bottom film sandwiched between the front and rear parts, as in a standing pouch, etc.

[0029] The printed layers formed on the front and rear portions may be provided on the outer surface of the packaging bag. However, providing them on the inner surface as in the above embodiment is preferable because the user will not come into contact with the printed layers. [Explanation of symbols]

[0030] 1 packaging bag 10 front 21 Low transmittance section 22 Window 40 rear 41 Projection area

Claims

1. A packaging bag having a front portion and a rear portion connected to the front portion, and having an opening at the top, the front portion has, in a lower portion thereof, a window portion including a plurality of windows, and a low transmittance portion formed around the windows and having a visible light transmittance lower than that of the window portion, and is configured without including a metal vapor deposition layer; a projection area having a metallic luster and reflecting light incident through the window portion is formed in a portion of the rear portion that overlaps with at least a part of the window portion and the low transmittance portion in a front view of the packaging bag; packaging bag.

2. the front portion and the rear portion are formed of a resin film, the low transmittance portion and the projection area are formed by printing; The packaging bag according to claim 1.

3. The visible light transmittance of the low transmittance portion is 15% or more and 30% or less. The packaging bag according to claim 1.

4. The visible light transmittance of the window portion is 80% or more. The packaging bag according to claim 1.

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