Labeled container, and method for manufacturing a labeled container.

Abstract

To provide a labeled container that can suppress the occurrence of wrinkles in the label when the container is deformed. [Solution] The labeled container of the present invention comprises a label and a container to which the label is attached. The label has a base film and an adhesive layer provided on the entire surface of one side of the base film. The adhesive layer contains an activated adhesive that exhibits adhesion (tackiness) when activated during bonding. The boundary between the label and the container includes an air vent portion consisting of at least one of an adhesive portion where the label and the container are bonded by the adhesive layer, a weakly bonded portion where the label and the container are bonded by the adhesive layer with a weaker adhesive force than the adhesive portion, and a non-bonded portion where the label and the container are not bonded. The air vent portion is in contact with the outer peripheral edge of the label at least at one location.

Description

Technical Field

[0001] The present invention relates to a labeled container and a method for manufacturing the labeled container.

Background Art

[0002] Labels (tack labels) attached to containers with adhesives (pressure-sensitive adhesives) are known. It is also known to use adhesives (activated resins) that are activated immediately before use, such as thermally activated adhesives, to exhibit adhesiveness (tackiness) and then used for label adhesion (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When the container with the label attached is deformed during filling, storage, use, etc. (for example, when the container expands due to heat and then contracts), wrinkles may occur on the label attached to the container.

[0005] In particular, thermally active resins (hot melt resins) have a reduced adhesive strength when heated. Therefore, labels using thermally active resins as the adhesive layer are likely to lift due to thermal expansion, etc., and are likely to wrinkle during contraction.

[0006] In conventional tack labels, for example, by increasing the adhesive strength of the label or the pressing force during attachment, factors (air pockets) that cause wrinkles on the label are prevented, or by selecting a soft film as the label substrate, the followability of the label to the container is enhanced to suppress the occurrence of wrinkles. Furthermore, there are also adhesive labels that have air-release grooves on the adhesive surface. Using these labels can suppress the occurrence of wrinkles, but they are special labels and increase material costs.

[0007] The object of the present invention is to provide a labeled container that can suppress the occurrence of wrinkles in the label when the container is deformed. [Means for solving the problem]

[0008] The labeled container of the present invention comprises a label and a container to which the label is attached. The label comprises a base film and an adhesive layer provided on the entire surface of one side of the base film. The adhesive layer includes an activated adhesive that exhibits adhesive properties when activated during bonding. The boundary between the label and the container is The adhesive layer bonded the label and the container to the adhesive portion, An air vent portion comprising at least one of a weakly bonded portion where the label and the container are bonded by the adhesive layer with a weaker adhesive force than the bonded portion, and a non-bonded portion where the label and the container are not bonded, Includes. The air vent portion is in contact with the outer edge of the label at least at one point. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a labeled container that can suppress the occurrence of wrinkles in the label when the container is deformed. [Brief explanation of the drawing]

[0010] [Figure 1] This is a schematic cross-sectional view showing the label used in the embodiment. [Figure 2] This is a schematic cross-sectional view showing the manufacturing process of a labeled container according to the embodiment. [Figure 3] This is a schematic cross-sectional view showing a labeled container of the embodiment. [Figure 4] It is a schematic cross-sectional view showing an example of an air vent portion in the labeled container of the embodiment. [Figure 5] It is a schematic cross-sectional view showing another example of the air vent portion in the labeled container of the embodiment.

Mode for Carrying Out the Invention

[0011] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same parts or common parts are denoted by the same reference numerals.

[0012] <Labeled container> Referring to FIGS. 1 to 5, the labeled container 1 of the present embodiment includes a label 2 and a container 5 to which the label is attached.

[0013] The label 2 has a front surface 2a and a back surface 2b that can be attached to the container 5. In a state where the label 2 is attached to the container 5, the front surface 2a is the surface on the opposite side of the container 5, and the back surface 2b is the surface on the container 5 side.

[0014] The label 2 has a base material film 3 and an adhesive layer 4 provided on one entire surface (the entire back surface 2b) of the base material film 3. That is, the label 2 is a label with an adhesive layer. The back surface 2b of the label 2 can be attached to the container 5 by the adhesive layer 4.

[0015] The container 5 (object) to which the label 2 is attached is not particularly limited. For example, it includes a container constituting the product itself (a container filled with contents), a packaging container for the product, a cardboard box, etc., and a package such as a shrink label attached to the container.

[0016] The adhesive layer 4 contains an activated adhesive. The activated adhesive is an adhesive that exhibits adhesiveness by being activated at the time of adhesion.

[0017] In the labeled container 1 of the present embodiment, the boundary between the label 2 and the container 5 includes an adhesive portion 41 and an air vent portion 42. Note that the boundary between the label 2 and the container 5 may include a plurality of adhesive portions 41 and a plurality of air vent portions 42. For example, as shown in FIG. 4, the boundary may include a plurality of adhesive portions 41 and a plurality of air vent portions 42 that are alternately arranged in a stripe shape.

[0018] The adhesive portion 41 (strong adhesive portion) is a portion where the label 2 and the container 5 are adhered by the adhesive layer 4.

[0019] The air vent portion 42 is composed of at least one of a weak adhesive portion and a non-adhesive portion. The weak adhesive portion is a portion where the label 2 and the container 5 are adhered by the adhesive layer 4 with an adhesive force weaker than that of the adhesive portion 41. For example, the adhesive force at the weak adhesive portion is adjusted to such an extent that it peels off when the air in the air pocket passes through. The non-adhesive portion is a portion where the label 2 and the container 5 are not adhered. In the non-adhesive portion, it is only necessary that the label 2 and the container 5 are not adhered, and the container 5 and the adhesive layer 4 may be in contact with each other on a part or the whole surface.

[0020] Each air vent portion 42 is in contact with the outer peripheral end of the label 2 (in a plan view as seen from the normal direction of the main surface) at at least one location. Thereby, an effect is obtained in that the air in the air pocket (the air that has entered and stayed at the boundary between the label 2 and the container 5), which is a factor causing wrinkles, can escape from the location where it is in contact with the outer peripheral end through the air vent portion 42.

[0021] It is preferable that each air vent portion 42 is in contact with the outer peripheral end of the label 2 at at least two locations. In this case, the air in the air pocket can more easily escape from the location where it is in contact with the outer peripheral end through the air vent portion 42.

[0022] Furthermore, the labels used in this embodiment do not need to be labels with air vents on the adhesive surface, such as "Matrix" (registered trademark) manufactured by Nichiei Shinka Co., Ltd., nor do they need to have air vents or the like on the surface of the adhesive layer (itself). In this respect, this embodiment has the excellent advantage of not requiring any special processing of the adhesive layer itself compared to the conventional technology.

[0023] The shape of the air vents 42 (each one) in a plan view taken from the direction normal to the main surface of label 2 is preferably striated (see Figure 4). Here, "strip-like" refers to a shape that extends in one direction, and includes elongated rectangles, straight lines, etc. Here, the sides of the rectangle and the straight lines do not have to be perfectly straight. The width of the stripes (rectangles, etc.) is not particularly limited, but for example, when the adhesive portion 41 and the air vent portion 42 are arranged alternately in a stripe pattern, it is preferable that the width of the air vent portion 42 is narrower than the width of the adhesive portion 41.

[0024] The length direction of the striped air vent portion 42 is preferably in the direction of the greatest curvature within the main surface (outer surface of the container 5) of the label 2 attached to the container 5 (see Figure 4). In Figure 4, the label 2 is attached to the cylindrical (barrel-shaped) body of the container 5, and since the curvature is greatest in the outer circumference direction (horizontal direction) of the cylindrical body, the length direction of the striped air vent portion 42 is preferably in the outer circumference direction of the cylindrical body. In this case, as shown in Figure 5, compared to the case where a slit-shaped air vent 42 is provided that extends in a direction other than the direction of greatest curvature, the air in the air pocket can escape more easily from the air vent 42, and the effect of suppressing wrinkles is higher, as has been found through the inventors' research.

[0025] Furthermore, the "direction with the greatest curvature" is preferably the direction with the greatest curvature on the main surface of label 2 (the outer surface of container 5) when the container is filled with contents, or when the container filled with contents has expanded due to heat (such as the heat of the contents immediately after filling, or the heat of the environment during storage or transportation). For example, when attaching a label to the outer surface of a container that has a flat outer surface before being filled with contents, it is preferable to set the orientation of the label so that the air vent portion 42 is oriented in the direction that has the greatest curvature in the shape of the outer surface of the container after it has expanded due to being filled with contents.

[0026] (Base film, base layer) The base film 3 (base layer 30) may be a resin film or paper. Examples of materials for resin films include polyethylene resins, polypropylene (PP) resins, cyclic olefin resins, polyolefin resins such as copolymer polymers containing polyethylene, polyester resins such as polyethylene terephthalate (PET), polyamide resins, polystyrene resins, and (meth)acrylic resins.

[0027] The thickness (total thickness) of the base film 3 is not particularly limited, but is preferably 10 μm to 100 μm, and more preferably 20 μm to 50 μm. If the label is too thin, its rigidity will be weak, potentially resulting in poor label application accuracy. Conversely, if the label is too thick, its rigidity will be excessive, potentially causing it to peel off the object easily or reducing its conformability.

[0028] Furthermore, a printing layer (not shown) may be provided on the front surface 2a of the base material layer 30 to enhance visibility and advertising effect as a label 2. Alternatively, a printing layer (not shown) may be provided on the back surface 2b of the base material layer 30. The method for forming the printed layer is not particularly limited, and conventional gravure printing, flexographic printing, letterpress printing, offset printing, etc., can be used.

[0029] (protective layer) A protective layer 31 may be provided on the front surface 2a side of the base material layer 30 (or on the front surface 2a side of the printed layer if a printed layer is provided on the front surface 2a side of the base material layer 30).

[0030] The protective layer 31 is a layer provided primarily to protect the surface of the heat-shrinkable film. The protective layer 31 is preferably transparent, and more preferably colorless and transparent. The protective layer 31 may also contain lubricants or other lubricating components as needed. The thickness of the protective layer 31 is, for example, 0.5 μm to 5 μm. The method for forming the protective layer 31 is not particularly limited, and gravure printing, flexographic printing, letterpress printing, offset printing, etc., can be used.

[0031] (Adhesive layer: activated adhesive layer) An adhesive layer 4 is provided on the entire surface of one side of the base film 3 (the entire back surface 2b). However, it is not necessarily required that the adhesive layer 4 be provided in all areas of the back surface 2b. Even if the adhesive layer 4 is only partially provided on the back surface 2b, it is still included in this embodiment as long as the adhesive portion 41 and the air vent portion 42 (weakly adhesive portion, non-adhesive portion) are not formed by the presence or absence of the adhesive layer 4.

[0032] In this embodiment, the adhesive layer 4 contains an activated adhesive. That is, the adhesive layer 4 is an activated adhesive layer. Activated adhesives (also called "re-activated adhesives") are adhesives that exhibit adhesive properties (tackiness) when activated during bonding (before activation, they have no adhesive properties or do not have sufficient adhesive properties to function as a tack label). For example, in the case of tack labels without a release liner, it is preferable to use an activated adhesive as the adhesive layer, and therefore this embodiment is suitable for such tack labels.

[0033] A typical example of an activated adhesive (activated adhesive resin) is a thermoactivated adhesive (heat-sensitive adhesive). A heat-activated adhesive is an adhesive that does not exhibit adhesive properties at room temperature (23°C) but becomes activated and exhibits adhesive properties upon heating. In this invention, the term "adhesive" includes a concept that includes substances called tacks. A heat-activated adhesive is not particularly limited as long as it does not exhibit adhesive properties at room temperature and becomes adhesive to a substrate upon heating.

[0034] Examples of heat-activated adhesives include delayed-tack type heat-sensitive adhesives, emulsion-type heat-sensitive adhesives that do not contain solid plasticizers (hereinafter simply referred to as "emulsion-type heat-sensitive adhesives"), solvent-type heat-sensitive adhesives, and hot-melt type adhesives. Delayed-tack type thermal adhesives are adhesives that do not have adhesive strength at room temperature, but are activated by heating to develop adhesive strength, which lasts for a long time after cooling. Delayed-tack type thermal adhesives can be applied by printing, such as gravure coating. Examples of delayed-tack type thermal adhesives include emulsion types in which a tackifier and a solid plasticizer are compounded into a base resin such as ethylene-vinyl acetate copolymer, vinyl acetate-acrylic acid ester copolymer, or synthetic rubber. Emulsion-type and solvent-type heat-sensitive adhesives do not exhibit adhesive strength at room temperature, but develop adhesive strength upon heating. These adhesives are, for example, solutions prepared by dissolving or dispersing a heat-adhesive resin such as ethylene-vinyl acetate copolymer and a tackifier in water or an organic solvent, and can be applied by printing methods such as gravure coating. Emulsion-type and solvent-type heat-sensitive adhesives are used after drying following application. Hot-melt adhesives are adhesives that do not have adhesive properties at room temperature but develop adhesive properties upon heating. Hot-melt adhesives are adhesives that can be applied by heating and melting them using a hot-melt coater, extrusion laminator, or the like. Examples of hot-melt adhesives include those made by compounding ethylene-based resins such as ethylene-vinyl acetate copolymers and ethylene-acrylic acid copolymers, or base resins such as styrene-butadiene block copolymers, with additives such as tackifiers.

[0035] The activation temperature of the heat-activated adhesive (heat-activated adhesive layer) is not particularly limited, and for example, a heat-activated adhesive with an activation temperature in the range of 30 to 80°C may be used. For example, a delayed-tack type heat-sensitive adhesive with an activation temperature of 40 to 80°C (preferably 50 to 65°C) can be used. Alternatively, an emulsion-type heat-sensitive adhesive or a solvent-type heat-sensitive adhesive with an activation temperature of 40 to 80°C (preferably 50 to 65°C) can be used. Furthermore, a hot-melt type adhesive with an activation temperature of 30 to 50°C (preferably 30 to 40°C) can be used.

[0036] Furthermore, a heat-activated adhesive, such as the one disclosed in Japanese Patent Publication No. 2014-71369, can also be used. This heat-activated adhesive has an activation temperature of 60°C to 110°C, preferably 60°C to 90°C, and more preferably 60°C to 70°C. Transparent heat-activated adhesives are particularly preferred. Examples of such heat-activated adhesives include those formulated by blending a base resin such as ethylene-vinyl acetate copolymer (EVA), ethylene-acrylic acid ester copolymer, ethylene-methacrylic acid ester copolymer, or thermoplastic elastomer (synthetic rubber, olefin-based such as ethylene-α-olefin, or thermoplastic elastomer such as urethane) with additives such as petroleum-based, terpene-based, terpene phenol-based, or chroman-indene-based tackifiers, waxes, or lubricants. Examples of waxes include higher fatty acid-based and polyethylene-based waxes, and examples of lubricants include amide-based waxes. The base resins can be used individually or in combination of two or more. Preferably, the base resin of the heat-activated adhesive comprises an ethylene copolymer and an olefin elastomer, and more preferably, an ethylene-vinyl acetate copolymer and an olefin elastomer. Such a heat-activated adhesive is activated at a relatively low temperature. Furthermore, when the base resin comprises an ethylene copolymer (preferably an ethylene-vinyl acetate copolymer) and an olefin elastomer, the content ratio is not particularly limited. The content of the ethylene copolymer in the heat-activated adhesive is, for example, 20% to 60% by mass, preferably 25% to 55% by mass; the content of the olefin elastomer is, for example, 10% to 50% by mass, preferably 15% to 45% by mass; and the content of the tackifier is, for example, 1% to 40% by mass, preferably 5% to 35% by mass. Among these, a heat-activated adhesive comprising an ethylene copolymer (preferably an ethylene-vinyl acetate copolymer) and an olefin elastomer as the base resin is preferred.

[0037] The thickness of the adhesive layer 4 is not particularly limited, and is, for example, about 3 μm to 30 μm. Furthermore, in order to firmly bond the back surface of the base film 3 and the adhesive layer 4, a known anchor coat layer (not shown) may be provided on the back surface of the base film 3, and the adhesive layer 4 may be provided on the back surface of the anchor coat layer.

[0038] (Photoactivating adhesive: Light-absorbing heat-generating agent) By incorporating a light-absorbing heat-generating agent (such as ultraviolet light) into a heat-activated adhesive (adhesive layer 4), and heating the heat-activated adhesive using the light-absorbing heat-generating agent, the adhesive layer 4 can be activated simply by irradiating it with light such as ultraviolet light. Furthermore, even heat-activated adhesive layers with relatively high activation temperatures can be easily activated. Adhesives made by incorporating a light-absorbing heat-generating agent into a heat-activated adhesive are also called photoactivated adhesives (photosensitive adhesives). Furthermore, a light-absorbing heat-generating agent may be incorporated into the base film 3 (base layer 10), etc., to enable heating of the adhesive layer 4.

[0039] Light-absorbing heat-generating materials are substances that convert light, such as ultraviolet rays, into thermal energy and use that thermal energy to raise the temperature of the surrounding area (generating heat). Examples of light-absorbing heat-generating agents (ultraviolet-absorbing heat-generating agents) include organic materials such as benzophenone compounds, salicylate compounds, cyanoacrylate compounds, benzoate compounds, benzotriazole compounds, and triazine compounds, or inorganic materials such as titanium dioxide, zinc oxide, and carbon black. These light-absorbing heat-generating agents may be used individually or in combination of two or more types.

[0040] When a light-absorbing heat-generating agent is included in the heat-activated adhesive layer, the content of the light-absorbing heat-generating agent is, for example, 0.5% to 10% by weight relative to the total weight of the heat-activated adhesive layer containing the light-absorbing heat-generating agent.

[0041] <Manufacturing method for labeled containers> The manufacturing method of this embodiment is the manufacturing method of the labeled container described above (a method for attaching the label 2 to the container 5). The manufacturing method of this embodiment includes at least an activation step and a pressing step.

[0042] In the activation process, the adhesive layer 4 is activated to exhibit adhesive properties. The activation process can be carried out, for example, by irradiating the adhesive layer 4 containing the UV-activated adhesive with ultraviolet light. Alternatively, it can be carried out, for example, by heating the adhesive layer 4 containing the heat-activated adhesive.

[0043] The pressing process (adhesion process) is performed after the activation process (within a predetermined period during which the activation of the adhesive layer 4 is maintained). In the pressing process, the side of the label 2 facing the adhesive layer 4 (back surface 2b) is pressed against the container. The pressing process can be carried out, for example, by pressing the pressing surface 6a of the pressing jig 6 against the label 2 in the pressing direction, thereby pressing the label 2 toward the application surface 5a of the container 5 (see Figure 2).

[0044] For example, referring to Figure 2, the back side 2b of the label 2 (the side with the adhesive layer 4) is positioned towards the outer surface (adhesion surface 5a) of the container 5. Then, while irradiating the label 2 with ultraviolet light, the pressing surface 6a of the pressing jig 6 is pressed against the front side 2a (base film 3) of the label 2, pressing the label 2 onto the adhesion surface 5a of the container 5. The pressing jig 6 has a pressing surface 6a that is shaped to approximately match the outer shape of the surface (adhesion surface 5a) of the container 5 to which the label is attached. For example, if a pressing jig 6 made of a material that transmits ultraviolet light is used, and the base film 3 is ultraviolet transparent, the adhesive layer 4 can be activated by irradiating the label 2 with ultraviolet light from the outside of the pressing jig 6, passing through the pressing jig 6 (see Figure 2). Alternatively, a pressing jig 6 made of a material that does not transmit ultraviolet light may be used, or a base film 3 that does not transmit ultraviolet light may be used. In this case, the adhesive layer 4 can be activated by irradiating the back side 2b (adhesive layer 4) of the label 2 with ultraviolet light.

[0045] By irradiating the label 2 (adhesive layer 4) with ultraviolet light, for example, an ultraviolet-absorbing heat-generating agent generates heat, and the heat activates the adhesive layer 4, making it ready to adhere to the container 5. The label 2, pressed against the outer surface of the container 5 by the pressing surface 6a of the pressing jig 6, adheres along the outer shape of the adhesive surface 5a of the container 5. In this way, as shown in Figure 3, a labeled container 1 is obtained by attaching label 2 to an object such as container 5.

[0046] The activation step and the pressing step may be performed simultaneously, or the pressing step may be performed after the activation step. It is preferable that the adhesive layer 4 is activated by the activation step at least by the time the pressing step begins.

[0047] In the manufacturing method of this embodiment, such activation and pressing steps can form an adhesive portion 41 and an air vent portion 42 at the boundary between the label 2 and the container 5. For example, by making the conditions for performing at least one of the activation process and the pressing process different for the adhesive portion 41 and the air vent portion 42, an adhesive portion 41 (strongly adhesive portion) and an air vent portion 42 (weakly adhesive portion, non-adhesive portion) can be formed.

[0048] Specifically, for example, in the pressing process, the pressing force applied to the air vent portion 42 can be made weaker than the pressing force applied to the adhesive portion 41, thereby forming the adhesive portion 41 and the air vent portion 42. The pressing force applied to the air vent portion 42 may be zero, meaning that no pressing force is applied. When the pressing force applied to the air vent portion 42 is zero, the air vent portion 42 may become a non-adhesive portion. Activated adhesives, after a predetermined time has elapsed since activation, either lack adhesive strength or do not possess sufficient adhesive strength to function as a tack label. Therefore, weakly bonded or non-bonded areas can remain weakly bonded or non-bonded without subsequently becoming strongly bonded areas. However, when using pressure-sensitive adhesives (adhesives) other than activated adhesives, while it may be possible to create a difference in adhesive strength between strongly bonded and weakly bonded areas immediately after application, stress during the manufacturing process eventually causes the entire surface to become strongly bonded. As a result, it is not possible to maintain weakly bonded areas that function as air vents.

[0049] Furthermore, for example, in the pressing process, by pressing the air vent portion 42 later than pressing the adhesive portion 41, the adhesive portion 41 and the air vent portion 42 can be formed. Since the adhesive strength of activated adhesive decreases as time passes after activation, pressing the adhesive portion 41 (pressing it against the container 5) as soon as possible after activation allows the adhesive portion 41 to be bonded with strong adhesive force, and then pressing the air release portion 42 after a predetermined time has elapsed allows the air release portion 42 to be bonded with lower adhesive force.

[0050] Furthermore, for example, in the activation process, by making the degree of activation of the adhesive layer 4 in the portion that will become the air vent portion 42 smaller than the degree of activation of the adhesive layer 4 in the portion that will become the adhesive portion 41, the adhesive portion 41 and the air vent portion 42 can be formed. The degree of activation (adhesion strength) of the adhesive layer 4 can be adjusted, for example, by varying the heating temperature or the intensity of the irradiation light (UV) used for activation.

[0051] Thus, in this embodiment, by taking advantage of the properties of the activated adhesive that constitutes the adhesive layer 4, it is possible to provide an adhesive portion 41 and an air vent portion 42 (weakly adhesive portion, non-adhesive portion).

[0052] Furthermore, when using pressure-sensitive adhesives (adhesives) that are not activated adhesives, it is possible to place an adhesive-suppressing (mask) layer on the surface of the adhesive layer in order to create a bonded area (strong bonded area) and a weak bonded or non-bonded area. However, in this case, it is necessary to form an adhesive backing, which increases the number of manufacturing steps and thus increases manufacturing costs. Also, using an adhesive backing only creates non-adhesive areas with zero adhesive strength, which may cause the label to peel off (especially if the non-adhesive area is located at the edge of the label).

[0053] In the manufacturing method of this embodiment, the individual labels 2 cut from the label base (a continuous strip) may be attached to the container 5 using an adhesive device or the like. For example, a roll of label material dispensed from a dispensing device is cut to a predetermined length by a cutting device, thereby producing individual labels 2. The cut labels 2 are then attached to a container 5 by an application device (see Figure 2).

[0054] Furthermore, the adhesive layer 4 may be made of a material whose adhesiveness is activated by light energy such as ultraviolet rays or infrared rays, or thermal energy such as hot air, and an activation device may be provided between the dispensing device and the application device to activate the adhesive layer 4 contained in the label 2 while transporting the label 2. In this case, the adhesive layer 4, which does not have adhesive properties until it is dispensed or does not have sufficient adhesive properties to function as a tack label, is activated by an activation device, and the label 2 with the activated adhesive layer 4 (with adhesive properties) is then attached to the container 5 by an application device 9. As a result, the handling of the label material is improved, and the time during which the adhesive layer 4 is adhesive is shortened, which can suppress the adhesion of dust and other particles to the adhesive layer 4 (the back surface 2b of the label 2).

[0055] The present invention is not limited to the embodiments described above and can be modified in various ways. Two or more embodiments selected from the various embodiments described above may be combined as appropriate, or at least one configuration (part of a configuration) selected from the various embodiments described above may be replaced with a part of a configuration of another embodiment. [Explanation of symbols]

[0056] 1. Labeled container 2 labels 2a Front side 2b Back side 3. Base film 31 Protective layer 30 Base material layer 4 Adhesive layer 5 containers 5a Adhesive surface 6. Pressing jig 6a Pressing surface

Claims

1. A label and a container to which the label is attached are included. The label comprises a base film and an adhesive layer provided on the entire surface of one side of the base film. The adhesive layer includes an activated adhesive that exhibits adhesive properties when activated during bonding. The boundary between the label and the container is The adhesive layer bonded the label and the container to the adhesive portion, An air vent portion comprising at least one of a weakly bonded portion where the label and the container are bonded by the adhesive layer with a weaker adhesive force than the bonded portion, and a non-bonded portion where the label and the container are not bonded, Includes, The air vent portion is in contact with the outer edge of the label at least at one location. Labeled container.

2. The labeled container according to claim 1, wherein the air vent portion is in contact with the outer edge of the label at least at two locations.

3. The labeled container according to claim 1, wherein the shape of the air vent portion of the label is slit-shaped.

4. The labeled container according to claim 3, wherein the longitudinal direction of the stripe-like air vent portion is the direction of the greatest curvature within the main surface of the label attached to the container.

5. A method for manufacturing a labeled container according to claim 1, An activation step is performed to activate the adhesive layer and exhibit adhesive properties. The process includes, after the activation step, pressing the adhesive layer side of the label against the container, A manufacturing method comprising the activation step and the pressing step, wherein the adhesive portion and the air vent portion are formed at the boundary between the label and the container.

6. The manufacturing method according to claim 5, wherein in the pressing step, the pressing force applied to the air vent portion is weaker than the pressing force applied to the adhesive portion, thereby forming the adhesive portion and the air vent portion.

7. The manufacturing method according to claim 5, wherein in the pressing step, pressing on the air vent portion is performed later than pressing on the adhesive portion, thereby forming the adhesive portion and the air vent portion.

8. The manufacturing method according to claim 5, wherein in the activation step, the degree of activation of the adhesive layer in the portion that will become the air vent portion is made smaller than the degree of activation of the adhesive layer in the portion that will become the adhesive portion, thereby forming the adhesive portion and the air vent portion.

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