Package

Abstract

To easily produce a package that can seal the contents and can be resealed after opening.SOLUTION: A package of the present invention is a package that can seal the contents and can be resealed after opening, and comprises: a container having a take-out port; a barrier layer adhered to the inner surface of the container so as to seal the take-out port; an intermediate layer provided on the outside of the container in a range including at least the take-out port and its surroundings, and heat-sealed to the barrier layer in at least a portion of the range of the take-out port; and a lid label having an adhesive layer capable of being peeled off and re-adhered, the lid label being attached via the adhesive layer to an area including at least the intermediate layer and its surroundings on the outer side of the container. The intermediate layer has a non-adhered portion at its peripheral part that is not adhered to the container.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] Patent Document 1 (Japanese Patent No. 6,586,282) and Patent Document 2 (Japanese Utility Model Application Laid-Open No. 6-65281) disclose packages that can seal the contents and can be resealed after opening. The package includes a container (package body) having a take-out opening, a barrier layer (protective film, auxiliary sealing sheet) that is attached to the inside of the container to seal the take-out opening, and a lid label (lid seal, sealing sheet) that is provided on the outside of the container to cover the take-out opening and can be repeatedly opened and closed. When the package is first opened, the lid label is peeled off, and a portion of the barrier layer that is roughly the same shape as the take-out opening is cut off by following the back surface of the lid label, and the barrier layer is broken. This opens the take-out opening. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6586282 [Patent Document 2] Japanese Utility Model Application Publication No. 6-65281 Summary of the Invention [Problem to be solved by the invention]

[0004] In the packages described in Patent Documents 1 and 2, in order to enable the barrier layer to be broken by peeling off the lid label, the lid label must be adhered to the barrier layer (the portion exposed from the opening) with a strength higher than the breaking strength of the barrier layer. For this reason, the lid label and the barrier layer are adhered with a strong adhesive (Patent Document 1) or heat seal (Patent Document 2). On the other hand, in order to make the lid label resealable after opening, it is necessary to provide an adhesive layer that can be repeatedly peeled off and attached in the area other than the area that is adhered to the barrier layer (strong adhesion area). For this reason, it was necessary to provide an adhesive layer partially on the lid label.

[0005] In this case, the area in which the adhesive layer is provided varies depending on the type of packaging material and the specifications of each product, so the area in which the adhesive layer is formed must be changed accordingly, which generally complicates the manufacturing process and increases manufacturing costs.

[0006] An object of the present invention is to easily manufacture a package that can seal the contents and can be resealed after opening. [Means for solving the problem]

[0007] The packaging body of the present invention is a packaging body capable of sealing the contents and being resealable after being opened, A container having an outlet; a barrier layer adhered to an inner surface of the container so as to seal the access opening of the container; an intermediate layer provided on the outside of the container in an area including at least the opening and its periphery, the intermediate layer being heat-sealed to the barrier layer in at least a portion of the opening; The container further comprises a lid label having a peelable and reattachable adhesive layer and attached via the adhesive layer to an area of ​​the outside of the container that includes at least the intermediate layer and its surroundings. The intermediate layer has a non-adhesive portion at its periphery that is not adhered to the container. Effect of the Invention

[0008] According to the present invention, a package capable of sealing the contents and being resealable after opening can be easily produced. [Brief description of the drawings]

[0009] [Figure 1]FIG. 2 is a cross-sectional view showing the state of the packaging body of the first embodiment before lamination. [Diagram 2] FIG. 2 is a schematic cross-sectional view of the package of the first embodiment. [Diagram 3] 1 is a schematic cross-sectional view showing the state of the package of embodiment 1 when it is first opened. FIG. [Figure 4] FIG. 2 is a schematic cross-sectional view for explaining an example of a manufacturing process of the package of the first embodiment. [Diagram 5] 5A to 5C are schematic cross-sectional views for explaining another example of the manufacturing process of the package of embodiment 1. [Figure 6] FIG. 6 is a cross-sectional view showing a state before stacking of the packaging body of embodiment 2. [Figure 7] FIG. 6 is a cross-sectional view of a package according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or common parts are denoted by the same reference numerals.

[0011] [Embodiment 1] <Package> The package of this embodiment is a package in which the contents can be stored and sealed inside the package and which can be resealed after opening, i.e., the package has a barrier layer that seals the opening of the container when first opened and is provided with a lid label that can be repeatedly opened and closed.

[0012] 1 and 2, a package 1 comprises at least a container 2, a barrier layer 21, a lid label 3, and an intermediate layer 4.

[0013] (container) The container 2 has an outlet 2a. The outlet 2a is an opening through which the contents can be put in and taken out.

[0014] The container 2 is not particularly limited, but examples thereof include a bag or a box capable of storing contents such as a product.

[0015] The contents stored inside the package 1 (container 2) are not particularly limited, and include a wide variety of contents that require sealing, such as beverages, cosmetics, liquids such as medicines, confectioneries, foods, etc. In addition, for example, a bundle of wet tissue paper made of paper, woven fabric, nonwoven fabric, etc., which is layered so that each sheet can be freely paid out, may be stored.

[0016] The material of the container 2 is not particularly limited, but if the contents contain liquid, it is preferable that the container 2 be made of a material that is highly liquid-tight (water-impermeable) or airtight. In addition, from the viewpoints of handling and portability, a thin and soft film material is preferable. For example, such a film material can be bonded at its ends by heat sealing or the like to form a bag-shaped container.

[0017] In the package 1 containing the contents, before opening, a high level of sealing can be maintained by the barrier layer 21 adhered to the inner surface of the container 2 so as to seal the removal opening 2a of the container 2, and the contents can be kept stable for a long period of time. Even after opening, the lid label 3 is peelably and reattachably attached to the container 2 so as to cover the removal opening 2a, and by reattaching the lid label 3 to the container 2 to close the removal opening 2a even after some of the contents have been removed from the container 2, the contents remaining in the container 2 can be prevented from drying out, etc.

[0018] (Barrier layer) The barrier layer 21 is adhered to the inner surface of the container 2 so as to seal the outlet 2a of the container 2. That is, the barrier layer 21 is provided in an area inside the container 2 that includes at least the outlet 2a and its surroundings.

[0019] The barrier layer 21 has a barrier property (sealing property) and a heat seal property (a property capable of being heat sealed). The barrier property is preferably liquid-tightness, and more preferably airtightness. The barrier layer 21 further preferably has a cut property (ease of cutting).

[0020] Examples of such a barrier layer 21 include a resin film containing a filler, a resin film mixed with an incompatible material, and a laminate film of an aluminum foil and a resin film. Here, the resin film has heat sealability. It is preferable to use a film having cohesive failure properties, such as a resin film containing a filler or a resin film mixed with an incompatible material, as the barrier layer 21. This is because such a film has excellent cutting properties.

[0021] Examples of materials for the resin film include polyolefin-based resins such as polyethylene-based resins, polypropylene (PP)-based resins, cyclic olefin-based resins, and copolymers containing polyethylene, polyester-based resins such as polyethylene terephthalate (PET), polyamide-based resins, polystyrene-based resins, and (meth)acrylic-based resins.

[0022] The thickness of the barrier layer 21 is not particularly limited, but is preferably as thin as possible while maintaining the necessary barrier properties. The thickness of the barrier layer 21 may be, for example, 5 to 100 μm.

[0023] (Middle class) The intermediate layer 4 is provided in a range including at least the removal opening 2a and its surroundings on the outside of the container 2. Note that the intermediate layer does not necessarily need to be provided around the entirety of the removal opening 2a, and it is sufficient that the intermediate layer is provided around at least a portion of the removal opening 2a. The intermediate layer 4 is heat-sealed to the barrier layer 21 (outside the container 2) in at least a portion of the area of ​​the access opening 2a (heat-sealed portion 4a).

[0024] The area where the intermediate layer 4 is provided in the top view (the size of the intermediate layer 4) is larger than the heat-sealed portion 4a, and preferably larger than the outlet 2a (opening) of the container 2. That is, the intermediate layer 4 is provided in an area larger than the heat-sealed portion. As a result, the intermediate layer 4 has a non-adhesive portion 4b around its periphery (around the heat-sealed portion 4a) that is not adhered to the container 2 (and to the portion of the barrier layer 21 other than the heat-sealed portion 4a). It is not necessary that the entire periphery of the intermediate layer 4 has a non-adhesive portion, and it is sufficient that at least a part of the periphery of the intermediate layer 4 has a non-adhesive portion.

[0025] Thus, in the package of this embodiment, the layer (intermediate layer 4) that is heat sealed to the barrier layer 21 is provided separately from the lid label 3. That is, at the peripheral end of the intermediate layer 4 attached to the lid label 3, there is a portion (non-adhesive portion 4b) where nothing is adhered to the container 2 side.

[0026] As a result, when the reattachable portion 31b of the lid label 3 is peeled off, the central portion 31a of the lid label 3 is not peeled off, and the non-adhesive portion 4b of the intermediate layer 4 is immediately pulled upward, resulting in the state shown in FIG. 3. In this state, even if the lid label 3 is further pulled up, only a force in the slip direction (shear direction) acts between the lid label 3 and the intermediate layer 4, not in the peeling direction, so that the lid label 3 is difficult to peel off from the intermediate layer 4. Therefore, even if the lid label 3 is lifted with a force required to break the barrier layer 21, the lid label 3 will not peel off from the intermediate layer 4, and the intermediate layer 4 will also be lifted together with the lid label 3, breaking the barrier layer 21. In this manner, the package 1 can be opened.

[0027] In this case, as described below, it is sufficient to provide an adhesive layer 31 on the entire surface of the lid label 3, and there is no need for a process of partially providing an adhesive layer on the lid label 3 to create a difference between the adhesion between the lid label and the barrier layer and the adhesion of the reattachable portion, as was done in the conventional method.This generally simplifies the manufacturing process and reduces manufacturing costs.

[0028] Therefore, according to this embodiment, a package that can seal the contents and can be resealed after opening can be easily manufactured (without using a method of partially providing an adhesive layer on the lid label 3).

[0029] The material of the intermediate layer 4 is not particularly limited as long as it is a material that can be heat-sealed to the barrier layer 21, but it is preferable that the intermediate layer 4 be made of the same material as the barrier layer 21 because of its high heat-sealability.

[0030] The intermediate layer 4 may be, for example, a resin film. Examples of materials for the resin film include polyolefin-based resins such as polyethylene-based resins, polypropylene (PP)-based resins, cyclic olefin-based resins, and copolymers containing polyethylene, polyester-based resins such as polyethylene terephthalate (PET), polyamide-based resins, polystyrene-based resins, and (meth)acrylic-based resins.

[0031] (Lid label) The lid label 3 has a peelable and reattachable adhesive layer 31, and is attached via the adhesive layer 31 to an area on the outside of the container 2 that includes at least the intermediate layer 4 and its surroundings.

[0032] The reattachable portion 31b of the lid label 3 (adhesive layer 31) is attached to the container 2 in a peelable and reattachable manner. The central portion 31a of the lid label 3 (adhesive layer 31) is attached to the intermediate layer 4, and remains attached to the intermediate layer 4 even when the lid label 3 is peeled off. That is, the central portion 31a is always attached to the intermediate layer 4 during normal use.

[0033] The adhesive layer 31 is a layer containing an adhesive for adhering the lid label 3 . The adhesive layer 31 can be formed by applying an adhesive to the back surface of the lid label 3. The adhesive is not particularly limited, but for example, an ultraviolet-curing hot-melt adhesive (such as an ultraviolet-curing acrylic hot-melt adhesive) can be used.

[0034] The peel strength of the lid label 3 is preferably sufficient to break the barrier layer 21 when the lid label 3 is peeled off at the first opening. In other words, it is preferable that the adhesive layer 31 of the lid label 3 has such adhesive strength (adhesion) that the central portion 31a of the lid label 3 (adhesive layer 31) does not peel off from the intermediate layer 4 when the barrier layer 21 is broken by peeling off the lid label 3. However, in this embodiment, as described above, the intermediate layer 4 is configured so that when the barrier layer 21 is broken by peeling off the lid label 3, the central portion 31a of the lid label 3 is unlikely to peel off from the intermediate layer 4. For this reason, it is not necessary to simply make the adhesive strength (peel strength) between the lid label 3 (adhesive layer 31) and the intermediate layer 4 higher than the welding strength (peel strength) between the barrier layer 21 and the intermediate layer 4; it is sufficient that the adhesive layer 31 has an adhesive strength that prevents the central portion 31a of the lid label 3 from peeling off from the intermediate layer 4 in the state shown in Fig. 3. Furthermore, if the adhesive strength of the adhesive layer 31 of the lid label 3 is too high, the lid label 3 cannot be easily peeled off and reattached, so it is preferable that the adhesive strength of the adhesive layer 31 of the lid label 3 be a certain strength or less that allows easy peeling and reattachment.

[0035] The adhesive layer 31 is provided essentially over the entire main surface of the lid label 3 on the side of the intermediate layer 4. However, in the vicinity of the peripheral edge of the lid label 3, a margin is usually provided and the adhesive layer 31 is not provided. In this way, even if there are parts where the adhesive layer 31 is not provided, as long as it does not complicate the manufacturing process, this is included in this embodiment and the effects of the present invention can be achieved.

[0036] The lid label 3 may be, for example, a resin film. Examples of materials for the resin film include polyolefin-based resins such as polyethylene-based resins, polypropylene (PP)-based resins, cyclic olefin-based resins, and copolymers containing polyethylene, polyester-based resins such as polyethylene terephthalate (PET), polyamide-based resins, polystyrene-based resins, and (meth)acrylic-based resins.

[0037] The lid label 3 may also be, for example, paper (paper base material). The paper preferably contains a paper material (pulp) as a main component. The pulp content in the paper base material is preferably 80% by mass or more, more preferably 90% by mass or more, and even more preferably 95% by mass or more. Examples of such paper substrates include unprocessed paper such as plain paper (medium-quality paper), fine paper, and synthetic paper, and processed paper such as coated paper (water-resistant paper), glossy paper, and matte paper. The lid label 3 may be processed paper such as glassine paper, paraffin paper, and cellophane. By using a high proportion of paper base material in the lid label 3, the environmental impact can be reduced.

[0038] In addition, if the material of the lid label 3 contains a plant-derived material, a biomass-derived material, a recycled material, a biodegradable material, or a natural material, the environmental impact can be further reduced.

[0039] The thickness of the lid label 3 is not particularly limited, but is preferably 5 to 300 μm, and more preferably 10 to 150 μm.

[0040] A printed layer displaying characters, designs, etc. may be formed on the surface of the lid label 3 (the surface opposite to the adhesive layer 31). For example, an ultraviolet-curable ink may be used as the ink for forming the printed layer. Furthermore, a transparent cover layer for protecting the printed layer may be provided on the surface of the printed layer.

[0041] (Manufacturing method) As an example of a method for manufacturing the packaging body of this embodiment, the packaging body may be manufactured by attaching a lid label 3 to a container 2 in which the intermediate layer 4 is heat-sealed to the barrier layer 21, as shown in Figure 4. In this case, the container 2 may be assembled and the container 2 may be filled with the contents before the lid label 3 is attached.

[0042] Also, for example, as shown in FIG. 5, a package may be produced by attaching a lid label 3 having an intermediate layer 4 attached to a container 2 provided with a barrier layer 21, and then heat sealing the intermediate layer 4 to the barrier layer 21. In this case, particularly when heat sealing is performed by heating the inside of the container 2, the container 2 (such as a box) is not assembled (it is in a flat state) before the lid label 3 is attached, and after heat sealing, the container 2 is assembled and the contents are filled into the container 2.

[0043] During the heat sealing, the periphery of the heat-sealed portion 4a of the barrier layer 21 may be pressed firmly and heat applied to weaken the barrier layer 21. This makes it easier for the heat-sealed portion 4a of the barrier layer 21 to be cut off when the package is first opened.

[0044] <Embodiment 2> The packaging body of embodiment 2 further includes a base label 5b affixed to the outer surface of container 2 in a portion where there is no intermediate layer 4 between the lid label 3 and container 2 (i.e., the portion where the lid label 3 is removably and reattachably attached to the container 2 via the adhesive layer 31). Other than that, the second embodiment is similar to the first embodiment, so a duplicated description will be omitted.

[0045] In embodiment 2, by providing a base label 5b, the lid label and base label are repeatedly peeled off and reattached, so that regardless of the material of the container 2, the adhesive layer 31 can be prevented from destroying (tearing) the material of the container 2 when the lid label 3 is peeled off. In particular, when the container 2 is made of paper, the container 2 is easily destroyed by the adhesive layer 31 of the lid label 3, so it is preferable to provide the base label 5b. In the package of the second embodiment, even if the container 2 is made of paper or the like, the container 2 is prevented from being broken.

[0046] The peel strength of the base label 5b (the adhesion between the base label and the container 2) is preferably higher than the peel strength of the lid label 3. In this case, the base label 5b is prevented from being peeled off from the container 2 when the lid label 3 is peeled off.

[0047] The peel strength of the lid label 3 and the peel strength of the base label are preferably sufficient to break the barrier layer 21 when the lid label 3 is peeled off at the first opening. For this reason, an adhesive having the necessary adhesiveness (adhesive strength) is selected for the adhesive layer 31 of the lid label 3 and the adhesive layer 51b of the base label 5b.

[0048] In Figures 6 and 7, a label 5a (and adhesive layer 51a) similar to the base label 5b is provided between the lid label 3 and the intermediate layer 4. However, for manufacturing purposes, a cut is made in a single piece of original label 5, and the base label 5b and label 5a are attached in a separated state to provide the base label 5b. Therefore, label 5a is simply attached at the same time as base label 5b is attached, and the label 5a portion does not have to be included.

[0049] The surface of the base label 5b (the side opposite the adhesive layer 51b) may be treated (e.g., with a silicone release treatment) to adjust the strength of adhesion via the reattachable portion 31b of the adhesive layer 31 of the lid label 3. This allows, for example, a strong adhesive to be used for the adhesive layer 31 of the lid label 3, increasing the adhesive strength between the central portion 31a and the label 5a to prevent it from peeling off when first opened, while weakening the adhesive strength between the re-attachable portion 31b and the base label 5b, making it possible to easily peel off and re-attach the lid label 3.

[0050] The base label 5b may be, for example, a resin film. Examples of materials for the resin film include polyolefin-based resins such as polyethylene-based resins, polypropylene (PP)-based resins, cyclic olefin-based resins, and copolymers containing polyethylene, polyester-based resins such as polyethylene terephthalate (PET), polyamide-based resins, polystyrene-based resins, and (meth)acrylic-based resins.

[0051] The thickness of the base label 5b is not particularly limited, but is preferably 5 to 100 μm, and more preferably 10 to 30 μm.

[0052] (summary) The above-mentioned embodiments of the present invention will be illustrated below.

[0053] (1) A package that can seal the contents and can be resealed after opening, A container having an outlet; a barrier layer adhered to an inner surface of the container so as to seal the access opening of the container; an intermediate layer provided on the outside of the container in an area including at least the opening and its periphery, the intermediate layer being heat-sealed to the barrier layer in at least a portion of the opening; a lid label having a peelable and reattachable adhesive layer and attached via the adhesive layer to an area including at least the intermediate layer and its periphery on the outside of the container; A packaging body, wherein the intermediate layer has a non-adhesive portion at its periphery that is not adhered to the container.

[0054] (2) The packaging body described in (1), further comprising a base label attached to the outer surface of the container in an area where the intermediate layer is not provided between the lid label and the container.

[0055] (3) A package according to (1) or (2), wherein the peel strength of the lid label is sufficient to break the barrier layer when the lid label is peeled off at the time of initial opening.

[0056] (4) A packaging body as described in (2), wherein the peel strength of the base label is higher than the peel strength of the lid label. [Explanation of symbols]

[0057] 1: Packaging 2: Container 2a: Extraction port 21: Barrier layer 3: Lid label 31:Adhesive layer 31a: Central part 31b: Re-attaching part 4: Middle class 4a: Heat seal section 4b: Non-adhesive part 5: Raw material label 5a: Label 5b: Base label 51a, 51b: Adhesive layer

Claims

1. A package capable of sealing the contents and being resealable after opening, A container having an outlet; a barrier layer adhered to an inner surface of the container so as to seal the access opening of the container; an intermediate layer provided on the outside of the container in an area including at least the opening and its periphery, the intermediate layer being heat-sealed to the barrier layer in at least a portion of the opening; a lid label having a peelable and reattachable adhesive layer and attached via the adhesive layer to an area including at least the intermediate layer and its periphery on the outside of the container; A packaging body, wherein the intermediate layer has a non-adhesive portion at its periphery that is not adhered to the container.

2. The package of claim 1 , further comprising a base label attached to the outer surface of the container in a portion between the lid label and the container where the intermediate layer is not provided.

3. 2. The package of claim 1, wherein the lid label has a peel strength sufficient to rupture the barrier layer when the lid label is peeled off upon initial opening.

4. The package of claim 2 , wherein the peel strength of the base label is greater than the peel strength of the lid label.

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