JP2022007425A - Packaging body - Google Patents

Abstract

To provide a packaging body which allows a consumer to purchase a product at ease, by allowing not only a portion covered by a see-through film but also a portion hidden by a non-see-through base material to be seen in a content, when purchasing the product at a store front and the like.SOLUTION: A packaging body includes a base material, a film, and a content. The base material and the film are joined so that the content is sealed. The base material includes a see-through upper layer part and a non-see-through lower layer part. An easy-to-peel layer is provided between the upper layer part and the lower layer part. The base material includes a hinge part, and a peeling piece formed by a cutout to the lower layer part provided by leaving the hinge part, and peeled via the easy-to-peel layer.SELECTED DRAWING: Figure 1

Description

The present invention relates to a package containing the contents.

Packaging containing the contents is known. For example, Patent Document 1 comprises a base material and a film attached to the upper surface of the base material while covering the contents placed on the base material, and the contents are formed by joining the base material and the film with a heat-sensitive adhesive. A sealed package is described.

JP-A-2019-51944

In the above package, a transparent film covers the contents, so when purchasing a product such as in a store, the part of the contents covered with the film can be seen, but the contents hidden in the non-transparent base material. I can't see the part. Therefore, the consumer has no choice but to purchase the product without knowing what kind of state the part hidden in the base material in the contents is, and with anxiety.

In view of the above problems, the present invention makes it possible to see not only the portion of the content covered with the transparent film but also the portion hidden by the non-transparent base material when purchasing a product such as a storefront. Therefore, the challenge is to provide a package that allows consumers to purchase products with peace of mind.

The invention according to claim 1 comprises a base material, a film, and contents.
The base material and the film are joined so that the contents are sealed.
The base material includes an upper layer portion that can be seen through and a lower layer portion that cannot be seen through, and an easily peelable layer is provided between the upper layer portion and the lower layer portion.
The base material has a hinge portion and a peeling piece formed by a notch in the lower layer portion made by leaving the hinge portion and peeled off via the easily peelable layer.
It is a package characterized by this.

The invention according to claim 2 is the package according to claim 1, wherein the upper layer portion of the base material includes at least a barrier layer.

According to the packaging according to the present invention, the base material bonded to the film so that the contents are sealed includes a transparent upper layer portion and a non-transparent lower layer portion, and is formed in the lower layer portion except for the hinge portion. It has a strip that is formed from the cuts made and is stripped via an easily stripped layer between the upper and lower layers.
Therefore, when purchasing a product such as in a store, the consumer can turn over the peeled piece formed by leaving the hinge portion of the base material as necessary, so that only the portion of the content covered with the transparent film can be seen. Instead, you can see the hidden parts of the base material that cannot be seen through, so consumers can purchase products with peace of mind.

(A) A perspective view before peeling off the peeled piece of the package of the first embodiment or the second embodiment. (B) A perspective view after peeling off the peeled pieces of the package of the first embodiment or the second embodiment. (A) A cross-sectional view taken along the line AA of FIG. 1 (a). (B) Cross-sectional view taken along the line BB of FIG. 1 (a). (C) Cross-sectional view taken along the line CC of FIG. 1 (b). (A) Bottom view before peeling off the peeled piece of the package of the first embodiment or the second embodiment. (B) Bottom view after peeling off the peeled pieces of the package of the first embodiment or the second embodiment. The cross-sectional view which shows the layer structure of the base material of the package body of 1st Embodiment. The cross-sectional view which shows the layer structure of the film of the package | body of 1st Embodiment or 2nd Embodiment. The cross-sectional view which shows the layer structure of the base material of the package body of 2nd Embodiment.

(First Embodiment)
FIG. 1A is a perspective view before peeling the peeling piece 41 of the package 10. FIG. 1A shows an example of a package containing the content 100. The content 100 is, for example, food and goods. Foods are, for example, fresh foods and processed foods. Articles are, for example, stationery and daily necessities. In the example shown in FIG. 1 (a), the content 100 is a block of beef for fresh food. The main elements constituting the package 10 are the base material 20 and the film 30. The content 100 is placed on the base material 20. The film 30 covers the contents 100 placed on the base material 20.

The base material 20 and the film 30 are joined so that the content 100 placed on the base material 20 is sealed. The film 30 is peeled off from the base material 20 through this joint portion. It is preferable that the film 30 is easily peeled off from the base material 20. By easily peeling the film 30 from the base material 20, the content 100 can be easily taken out.

The base material 20 has a hinge portion 42 and a peeling piece 41 formed by a notch 43 made leaving the hinge portion 42. The peeling piece 41 is formed by a notch 43 in the lower layer portion 20B of the base material 20 described later, and is peeled off from the upper layer portion 20A of the base material 20 via the easy peeling layer 50.

FIG. 1B is a perspective view after peeling off the peeling piece 41 of the package 10 of FIG. 1A. Since the peeling piece 41 formed on the base material 20 is formed by the notch 43 made leaving the hinge portion 42, when the peeling piece 41 is peeled off, it is not completely peeled off but is not completely peeled off by the hinge portion 42. It has a structure that can be turned over in a connected state.

The shape of the base material 20 in a plan view can be arbitrarily selected. In addition to the rectangle shown in FIG. 1, etc., it may be a triangle, a square, a polygon having a pentagon or more, a circle, or an ellipse.

2A is a cross-sectional view taken along the line AA of the package 10 before the peeling piece 41 of FIG. 1A is peeled off, and FIG. 2B is the peeling of FIG. 1A. It is sectional drawing along the BB line of the package body 10 before peeling off a piece 41. Further, FIG. 2C is a cross-sectional view taken along the line CC of the package 10 after the peeling piece 41 of FIG. 1B is peeled off.

The base material 20 includes a transparent upper layer 20A and a non-transparent lower layer 20B, and an easily peelable layer 50 is provided between the upper layer 20A and the lower layer 20B. Further, the base material 20 has a peeling piece 41 that is peeled from the upper layer portion 20A via the easily peeling layer 50 by the cut 43 made in the lower layer portion 20B while leaving the hinge portion 42.

In FIG. 2, the easily peelable layer 50 is a peeling varnish layer, which is provided as a whole between the upper layer portion 20A and the lower layer portion 20B, but is provided, for example, only at the portion where the peeling piece 41 is peeled off. May be good. That is, it may be provided only between the upper layer portion 20A and the lower layer portion 20B in a range surrounded by at least the notch 43 into the lower layer portion 20B and the hinge portion 42.

The range in which the portion where the base material 20 and the film 30 are joined is provided can be arbitrarily selected. The range in which the portion where the base material 20 and the film 30 are joined is preferably provided is at least a predetermined range including the edge of the base material 20 and a range corresponding to the predetermined range including the edge of the film 30. .. Therefore, it is difficult for foreign matter to enter between the base material 20 and the film 30. In the example shown in FIGS. 1 to 3, the portion where the base material 20 and the film 30 are joined is provided over the entire range of the base material 20.

As shown in FIG. 2C, when the peeling piece 41 formed by the notch 43 in the lower layer portion 20B is peeled from the upper layer portion 20A via the easy peeling layer 50, it is not completely peeled off. , The structure is such that it can be turned over while being connected by the hinge portion 42.

The packaging form of the package 10 can be arbitrarily selected. The packaging form of the package 10 is, for example, a skin pack and a vacuum pack. In the present embodiment, the packaging form of the package 10 is a skin pack. As shown in FIG. 2, when the packaging form of the package 10 is a skin pack, the film 30 is in close contact with the content 100, and the portion 30X of the film 30 that is not in close contact with the content 100 and the base. Substantially no space is formed between the material 20 and the material 20. Therefore, for example, when the content 100 is a fresh food or a processed food, the drip generated from the content 100 is unlikely to flow out onto the base material 20. Therefore, the appearance of the package 10 is maintained for a long period of time. Further, when the packaging form of the packaging body 10 is a skin pack, there is substantially no space for the contents 100 to move with respect to the base material 20 and the film 30, so that the packaging body 10 is suspended in a store, for example. It can be displayed in the lowered state. Since the content 100 can be easily visually recognized by the consumer, it is possible to increase the consumer's willingness to purchase. When the packaging form of the package 10 is a vacuum pack, the film 30 is slightly in close contact with the content 100 and between the portion 30X of the film 30 that is not in close contact with the content 100 and the base material 20. Space is formed.

Further, when the packaging form of the package 10 is a skin pack, since the base material 20 is flat, it is easy to complete the steps at the store and it is easy to print on the base material 20.

FIG. 3A is a bottom view of the package 10 of FIG. 1 before the peeling piece 41 is peeled off. FIG. 3B is a bottom view after the peeling piece 41 of the package 10 of FIG. 1 is peeled off. In FIG. 3, the peeling piece 41 has a size and shape so that the entire portion of the content 100 hidden by the base material 20 can be seen from the bottom surface side of the package 10 (here, the side opposite to the content 100 of the base material 20). However, to the extent that consumers can purchase products with peace of mind, the size is such that a part of the contents 100 hidden by the base material 20 can be seen from the bottom surface side of the package 10. It may be provided in a shape. Further, the shape of the peeling piece 41 may be a triangle, a square, a polygon having a pentagon or more, a circle, an ellipse, or the like, in addition to the rectangle shown in FIG.

The upper layer portion 20A of the base material 20 can be seen through, and the lower layer portion 20B of the base material 20 cannot be seen through. Since the lower layer portion 20B cannot be seen through, the contained contents 100 cannot be seen from the bottom surface side of the package 10 as shown in FIG. 3A. However, as shown in FIG. 3B, the peeling piece 41 formed by the notch 43 in the lower layer portion 20B that cannot be seen through is turned over with the hinge portion 42 connected, and is seen from the upper layer portion 20A that can be seen through. By peeling, the upper layer portion 20A that can be seen through is exposed in the peeled range, and the content 100 can be seen through from the bottom surface side. As described above, in FIG. 3, the peeling piece 41 is provided in a size and shape so that the entire portion of the content 100 hidden by the base material 20 can be seen from the bottom surface side of the package 10, so that the peeling piece 41 is provided. By turning over, it becomes possible to see through the entire part of the content 100 hidden by the base material 20 from the bottom surface side of the package 10. Further, as shown in FIG. 1, it is possible to see through the portion of the content 100 covered with the see-through film 30.

Therefore, at the time of purchasing a product such as in a store, the consumer can cover the contents 100 with the transparent film 30 by turning over the peeling piece 41 formed by leaving the hinge portion 42 in the base material as necessary. Not only the broken part but also the part hidden by the base material 20 that cannot be seen through can be seen. Therefore, the consumer can see the entire contents 100 and can purchase the product with peace of mind.

FIG. 4 is a cross-sectional view showing the layer structure of the base material 20 of the package 10. As shown in FIG. 4, by providing the easily peelable layer 50 between the layers of the multilayer base material 20, the upper layer portion 20A and the lower layer portion 20B are separated. The upper layer portion 20A includes a layer (the innermost layer 21 of the base material 20) bonded to the film 30. The upper layer portion 20A has, for example, a three-layer structure in which the innermost layer 21, the barrier layer 22, and the release layer 23 are laminated. The lower layer portion 20B has, for example, a three-layer structure in which a polyolefin-based or polyester-based resin layer 24, a paper layer 25, and a waterproof layer 26 are laminated. Further, an easily peelable layer 50 is provided between the upper layer portion 20A and the lower layer portion 20B.

The layers 21 to 23 and the layers 24 to 26 are laminated by, for example, a dry laminating method. The upper layer portion 20A including each layer 21 to 23 and the lower layer portion 20B including each layer 24 to 26 are detachably joined via the easily peelable layer 50. In FIG. 2, for the sake of simplification of the drawings, the detailed layer structure of the base material 20 is not shown.

The innermost layer 21 of the upper layer portion 20A is laminated at the innermost position of the base material 20, in other words, at the position closest to the content 100. The content 100 is placed on the innermost layer 21. The innermost layer 21 is made of a material that can be easily peeled when joined to the innermost layer 31 (see FIG. 4) of the film 30. The innermost layer 21 is preferably made of a material including a waterproof function. Therefore, the water flowing out from the content 100 is less likely to leak. The material constituting the innermost layer 21 is, for example, polyethylene. The thickness of the innermost layer 21 is, for example, 55 μm. When the packaging form of the package 10 is a skin pack or a vacuum pack, the portion 30Y (see FIG. 2) of the innermost layer 31 facing the content 100 is in close contact with the content 100.

The barrier layer 22 of the upper layer portion 20A is laminated on the innermost layer 21 on the opposite side of the content 100, for example. The barrier layer 22 is preferably made of a material having excellent gas barrier property and moisture barrier property. Since the barrier layer 22 is made of a material excellent in at least one of gas barrier property and moisture barrier property, the quality of the contents is well maintained for a long period of time. When the barrier layer 22 is made of, for example, a material having excellent gas barrier properties, the gas whose permeation is suppressed by the barrier layer 22 is, for example, oxygen. Further, when the barrier layer 22 is made of, for example, a material having excellent moisture barrier properties, when the content 100 contains moisture, the moisture exuded from the content 100 does not easily permeate into the paper layer 25 of the lower layer portion 20B. .. Therefore, the strength of the base material 20 is maintained. The material constituting the barrier layer 22 is, for example, polyethylene terephthalate on which an inorganic thin film such as aluminum oxide or silicon oxide is vapor-deposited. The thickness of the barrier layer 22 is, for example, 12 μm.

In the following, the side opposite to the content 100 with respect to any layer may be referred to as the outside.
The peeling layer 23 of the upper layer portion 20A is laminated at the outermost position of the upper layer portion 20A, in other words, at the position farthest from the content 100 of the upper layer portion 20A. In FIG. 2, the peeling layer 23 is an easy peel layer. The peeling layer 23 is a layer in which the content 100 is peeled off in the base material 20 while being sealed, and is connected to the upper layer portion 20A via the peeling layer 50 between the peeling layer 23 and the upper layer portion 20A and the lower layer portion 20B. It is separated from the lower layer portion 20B. The release layer 23 is made of a material that can be easily peeled when bonded to the polyolefin-based or polyester-based resin layer 24 of the lower layer portion 20B. The material constituting the release layer 23 is, for example, an ionomer resin or a heat-sealable biaxially stretched polypropylene film (HS-OPP). The thickness of the easy peel layer is, for example, 30 μm.

The polyolefin-based or polyester-based resin layer 24 of the lower layer portion 20B is laminated at the innermost position of the lower layer portion 20B, in other words, at the position closest to the content 100 of the lower layer portion 20B. The polyolefin-based or polyester-based resin layer 24 is laminated on the peeling layer 23 of the upper layer portion 20A via the easily peeling layer 50. The polyolefin-based or polyester-based resin layer 24 is made of a material that can be easily peeled when bonded to the release layer 23 of the upper layer portion 20A. The polyolefin-based or polyester-based resin layer 24 is preferably made of a material including a waterproof function. Therefore, the water flowing out from the content 100 is less likely to leak. The material constituting the polyolefin-based or polyester-based resin layer 24 is, for example, polyethylene. The thickness of the polyolefin-based or polyester-based resin layer 24 is, for example, 20 μm.

The paper layer 25 of the lower layer portion 20B is laminated on the outside of the polyolefin-based or polyester-based resin layer 24, for example. The material constituting the paper layer 25 is, for example, non-recycled paper or recycled paper. In the present embodiment, the material constituting the paper layer 25 is non-recycled paper. When the material constituting the paper layer 25 is recycled paper, it is preferable that it is used paper distributed only in the factory of the paper manufacturer from the viewpoint of hygiene. The basis weight that contributes to the thickness of the paper layer 25 can be arbitrarily selected. The basis weight of the paper layer 25 is preferably determined based on the relationship between the resistance to warpage of the base material 20 when the base material 20 and the film 30 are joined and the thickness of the package 10.

An example of a preferable range in which the basis weight of the paper layer 25 can be taken is 100 g / m ² or more and 1000 g / m ² or less. When the basis weight of the paper layer 25 is 1000 g / m ² or less, the thickness of the package 10 does not become too thick. Therefore, the display space of the package 10 can be reduced. Moreover, the cost of the package 10 can be reduced. When the basis weight of the paper layer 25 is 100 g / m ² or more, the base material 20 is less likely to warp when the base material 20 and the film 30 are joined. In one example, the basis weight of the paper layer 25 is 310 g / m ² .

The waterproof layer 26 of the lower layer portion 20B is laminated on the outside of the paper layer 25, for example. The waterproof layer 26 is made of a material including a waterproof function. Therefore, even when dew condensation occurs, it is difficult for water to permeate into the paper layer 25. Therefore, the strength of the base material 20 is maintained. The material constituting the waterproof layer 26 is, for example, polyethylene. The thickness of the waterproof layer 26 is, for example, 20 μm.

The base material 20 further includes a printing layer (not shown). The position where the print layer is provided on the base material 20 can be arbitrarily selected. In one example, the print layer is provided between the barrier layer 22 and the innermost layer 21 of the upper layer 20A.

Further, a notch 43 is provided in the lower layer portion 20B of the base material 20. The notch 43 is provided, for example, in the manufacturing process of the base material 20 before joining the base material 20 and the film 30. For example, after the cut 43 is provided in the lower layer portion 20B in which the layers 24 to 26 are laminated, the lower layer portion 20B is joined to the upper layer portion 20A in which the layers 21 to 23 are laminated via the easily peelable layer 50. Alternatively, for example, a cut 43 may be provided in the lower layer portion 20B after the lower layer portion 20B in which the layers 24 to 26 are laminated and the upper layer portion 20A in which the layers 21 to 23 are laminated are joined via the easily peelable layer 50.

The notch 43 is formed by penetrating the lower layer portion 20B including the polyolefin-based or polyester-based resin layer 24, the paper layer 25, and the waterproof layer 26, while leaving the hinge portion 42. When the cut 43 is provided in the lower layer portion 20B after the lower layer portion 20B and the upper layer portion 20A are joined via the easily peelable layer 50, the lower layer portion 20B is provided so as not to extend to the barrier layer 22 of the upper layer portion 20A.

An easily peelable layer 50 is provided between the upper layer portion 20A and the lower layer portion 20B. The easily peelable layer 50 separates the upper layer portion 20A and the lower layer portion 20B, and the peeling piece 41 can be turned over and peeled off. The heating conditions of the upper layer portion 20A for joining the lower layer portion 20B to the upper layer portion 20A via the easily peelable layer 50 include a heating temperature and a heating time. The heating temperature is, for example, 120 ° C. The heating time is, for example, 10 seconds.

The easily peelable layer 50 provided between the upper layer portion 20A and the lower layer portion 20B is, for example, a peeling varnish layer. The peeling varnish layer is made of, for example, a wax-containing peeling varnish agent, and is laminated on the polyolefin-based or polyester-based resin layer 24 of the lower layer portion 20B. The laminating method is a known gravure coating method or roll coating method using a release varnish agent. The amount to be applied is appropriately selected according to the type of release varnish.

FIG. 5 is a cross-sectional view showing the layer structure of the film 30 of the package 10. As shown in FIG. 5, the film 30 has, for example, a six-layer structure in which the innermost layer 31, the first adhesive layer 32, the barrier layer 33, the second adhesive layer 34, the intermediate layer 35, and the outermost layer 36 are laminated. Be prepared. The layers 31 to 36 are laminated by, for example, a coextrusion method. In FIG. 2, for the sake of simplification of the drawings, the detailed layer structure of the film 30 is not shown. The film 30 is preferably made of a material capable of seeing through the content 100.

The innermost layer 31 is laminated on the innermost side of the film 30, in other words, at the position closest to the content 100. When the packaging form of the package 10 is a skin pack or a vacuum pack, the portion 30Y (see FIG. 2) of the innermost layer 31 facing the content 100 is in close contact with the content 100. The innermost layer 31 is made of a material that can be easily peeled when joined to the innermost layer 21 (see FIG. 3) of the base material 20. The material constituting the innermost layer 31 is, for example, an ionomer resin. The thickness of the innermost layer 31 is, for example, 30 μm.

The first adhesive layer 32 is laminated on the outer side of the innermost layer 31, for example. The first adhesive layer 32 adheres the innermost layer 31 and the barrier layer 33. The material constituting the first adhesive layer 32 is, for example, a two-component curable urethane-based adhesive. The thickness of the first adhesive layer 32 is, for example, 5 μm.

The barrier layer 33 is laminated on the first adhesive layer 32 on the opposite side of the content 100, for example. The barrier layer 33 is preferably made of a material having at least one excellent gas barrier property, oil resistance, and moisture resistance. The material constituting the barrier layer 33 is, for example, ethylene-vinyl alcohol copolymer (EVOH) or barrier nylon. The gas whose permeation is suppressed by the barrier layer 33 is, for example, oxygen. The thickness of the barrier layer 33 is, for example, 30 μm.

The second adhesive layer 34 is laminated on the outer side with respect to the barrier layer 33, for example. The second adhesive layer 34 adheres the barrier layer 33 and the intermediate layer 35. The material constituting the second adhesive layer 34 is, for example, a two-component curable urethane-based adhesive. The thickness of the second adhesive layer 34 is, for example, 5 μm.

The intermediate layer 35 is laminated on the outer side with respect to the second adhesive layer 34, for example. The intermediate layer 35 is preferably made of a material having excellent toughness and wear resistance at least one of them. The material constituting the intermediate layer 35 is, for example, polyamide. The thickness of the intermediate layer 35 is, for example, 30 μm.

The outermost layer 36 is laminated on the outer side with respect to the intermediate layer 35, for example. The outermost layer 36 is preferably made of a material having at least one excellent heat resistance, gas barrier property, moisture resistance, strength, and transparency. The material constituting the outermost layer 36 is, for example, polyester. The thickness of the outermost layer 36 is, for example, 50 μm.

Further, the bonding strength in which the upper layer portion 20A and the lower layer portion 20B of the base material 20 are bonded via the easily peelable layer 50, and the base material 20 and the film 30 are bonded so that the content 100 is sealed. The joint strength of the portions can be arbitrarily selected.

In a preferable example of the joining strength of the portion where the upper layer portion 20A and the lower layer portion 20B are joined, the joining strength is the case where an external force of a standard size acts on the package 10 in the process of transporting the package 10. It is determined based on the relationship between the difficulty of peeling the lower layer portion 20B with respect to the upper layer portion 20A and the ease of peeling of the lower layer portion 20B with respect to the upper layer portion 20A.

In a preferable example of the bonding strength of the portion where the base material 20 and the film 30 are bonded so that the content 100 is sealed, the bonding strength is a standard size for the package 10 in the process of transporting the package 10. It is determined based on the relationship between the difficulty of peeling the film 30 when an external force is applied and the ease of peeling the film 30 when the content 100 is taken out.

An example of a range in which the bonding strength of the portion where the base material 20 and the film 30 are bonded so that the content 100 is sealed is 0.5 N / 15 mm or more and 5 N / 15 mm or less. In one example, the joint strengths are 2N / 15mm, respectively. Since the bonding strength of the portion where the base material 20 and the film 30 are bonded is included in the range of 0.5 N / 15 mm or more so that the content 100 is sealed, for example, it is standard in the transport process of the package 10. Even when an external force of a magnitude acts, the portion where the base material 20 and the film 30 are joined is difficult to peel off so that the content 100 is sealed. Further, since the bonding strength of the portion where the base material 20 and the film 30 are bonded is included in the range of 5N / 15 mm or less so that the content 100 is sealed, the force of a standard magnitude applied by the user can be used. , The film 30 can be peeled off from the base material 20.

Further, the package 10 may be provided with a peeling start portion for facilitating the peeling of the film 30 from the base material 20. By doing so, it becomes easy to determine the location of the peelable portion between the base material 20 and the film 30, and the peelable portion can be peeled off more easily.

For example, a notch is provided at the end of the joint portion between the base material 20 and the film 30. For example, in FIG. 4, a notch is provided at the end of the innermost layer 21 of the base material 20.

Further, if the notch is left as it is, a gap is created between the layer having the notch and the film 30 bonded to the notch by the amount of the notch, and if it is left as it is, foreign matter may enter the notch, which is unsanitary. be. Therefore, in the upper and lower layers of the layer provided with the notch, a sealing varnish is applied to the end face portion of the notch. Further, the peeling start portion can be confirmed by showing the portion provided with the notch on the side surface of the base material 20 by printing or the like.

Further, printing or the like indicating the range of the peeling piece 41 may be performed so that the range of the peeling piece 41 in the base material 20 can be known. By printing or the like indicating the range of the peeling piece 41 on the base material 20, the peeling piece 41 is a part that can be peeled off so that the consumer can confirm the content 100 hidden from a part of the base material 20 at a store or the like. It will be easier to determine the location of. Further, a peeling start portion for peeling the peeling piece 41 may be provided. By providing the peeling start portion, the peeling piece 41 can be more easily peeled off by the consumer at a store or the like as needed.

For the peeling start portion of the peeling piece 41, for example, a notch is provided at the end portion of the peeling piece 41. For example, in FIG. 4, a notch is provided at the end of the polyolefin-based or polyester-based resin layer 24 and the paper layer 25 of the lower layer portion 20A of the base material 20.

In addition, if this notch is left as it is, a gap is created between the layer having the notch and the layer laminated on the notch by the amount of the notch, and if it is left as it is, foreign matter may enter the notch, which is unsanitary. .. Therefore, in the upper and lower layers of the layer provided with the notch, a sealing varnish is applied to the end face portion of the notch.

(Second Embodiment)
FIG. 6 is a cross-sectional view showing the layer structure of the base material 60 of the package 11 of the second embodiment. A cross-sectional view showing the layer structure of the film of the package 11 of the second embodiment is shown in FIG. 5, which is the same as the film 30 of the package 10 of the first embodiment.

The base material 60 of the package 11 of the second embodiment will be described with reference to FIG. The configurations common to the first embodiment may be designated by the same reference numerals as those of the first embodiment, and duplicate description may be omitted. The package 11 of the second embodiment has the same layer structure as the package 10 of the first embodiment, but differs in the layer structure of the base material.

As shown in FIG. 6, by laminating the easily peelable layer 50 between the layers of the multi-layered base material 60, the upper layer portion 60A and the lower layer portion 60B are separated. The upper layer portion 60A has, for example, a two-layer structure in which an innermost layer 21 and a release layer 61 that also functions as a barrier layer are laminated. The lower layer portion 60B has, for example, a three-layer structure in which a polyolefin-based or polyester-based resin layer 24, a paper layer 25, and a waterproof layer 26 are laminated. In FIG. 6, the peeling layer 61 also having a function as a barrier layer is a barrier layer having a function as an easy peel layer.

The layers 21 and 61 and the layers 24 to 26 are laminated by, for example, a dry laminating method.

The release layer 61, which also functions as a barrier layer of the upper layer portion 60A, is laminated on the innermost layer 21 on the opposite side of the content 100, for example. The release layer 61, which also has a function as a barrier layer, is preferably made of a material having excellent gas barrier property and moisture barrier property. Since the release layer 61, which also functions as a barrier layer, is made of a material excellent in at least one of gas barrier property and moisture barrier property, the quality of the content 100 is well maintained for a long period of time. When the release layer 61 also having a function as a barrier layer is made of, for example, a material having excellent gas barrier properties, the gas whose permeation is suppressed by the release layer 61 also having a function as a barrier layer is, for example, oxygen. Further, when the release layer 61 having a function as a barrier layer is made of, for example, a material having excellent moisture barrier properties, when the content 100 contains moisture, the moisture exuded from the content 100 is contained in the lower layer portion 60B. It is difficult to penetrate the paper layer 25. Therefore, the strength of the base material 60 is maintained.

Further, the peeling layer 61 having a function as a barrier layer is laminated at the outermost position of the upper layer portion 60A, in other words, at the position farthest from the content 100 of the upper layer portion 60A. The peeling layer 61, which also functions as a barrier layer, is made of a material that can be easily peeled when laminated with the polyolefin-based or polyester-based resin layer 24 of the lower layer portion 60B. The material constituting the release layer 61 that also functions as a barrier layer is, for example, biaxially stretched polypropylene on which an inorganic thin film such as aluminum oxide is vapor-deposited. The thickness of the release layer 61, which also functions as a barrier layer, is, for example, 12 μm.

The base material 60 further includes a printing layer (not shown). The position where the print layer is provided on the base material 60 can be arbitrarily selected. In one example, the print layer is provided between the release layer 61, which also functions as a barrier layer, and the innermost layer 21.

Further, a notch 43 is provided in the lower layer portion 60B of the base material 60. The notch 43 is provided, for example, in the manufacturing process of the base material 60 before joining the base material 60 and the film 30. For example, after the cut 43 is provided in the lower layer portion 60B in which the layers 24 to 26 are laminated, the lower layer portion 60B is joined to the upper layer portion 60A in which the layers 21 and 61 are laminated via the easily peelable layer 50. Alternatively, for example, a cut 43 may be provided in the lower layer portion 60B after the lower layer portion 60B in which the layers 24 to 26 are laminated and the upper layer portion 60A in which the layers 21 and 61 are laminated are joined via the easy peeling layer 50.

The notch 43 is formed by penetrating the lower layer portion 60B including the polyolefin-based or polyester-based resin layer 24, the paper layer 25, and the waterproof layer 26, while leaving the hinge portion 42. When the lower layer portion 60B and the upper layer portion 60A are joined via the easy peeling layer 50 and then the cut 43 is provided in the lower layer portion 60B, the upper layer portion 60A should not be extended to the peeling layer 61 which also functions as a barrier layer. It will be provided.

In the description of FIGS. 1 to 4 and 6 in the package 10 of the first embodiment, the package 11 of the second embodiment includes the package 10 as the package 11 and the base material 20 as the base material 60. The upper layer portion 20A is read as the upper layer portion 60A, and the lower layer portion 20B is read as the lower layer portion 60B, respectively.

(Variation example)
It should be noted that each of the above embodiments is an example of possible forms of the package according to the present invention, and is not intended to limit the forms. The package according to the present invention may take a form different from the form exemplified in each embodiment. One example thereof is a form in which a part of the configuration of each embodiment is replaced, changed, or omitted, or a new configuration is added to each embodiment. An example of modification of each embodiment is shown below.

In the first embodiment and the second embodiment, the layer configurations of the base material 20 and the base material 60 can be arbitrarily changed.

In the first embodiment and the second embodiment, the configuration of the paper layer 25 can be arbitrarily changed. The paper layer of the modified package contains at least one of a sizing agent and a water resistant agent. The sizing agent is added to the paper when the paper forming the paper layer is made. The water resistant agent is applied to the paper constituting the paper layer. In the package of this modification, since the paper layer includes a waterproof function, for example, the waterproof layer 26 can be omitted.

In the first embodiment and the second embodiment, the configuration of the waterproof layer 26 can be arbitrarily changed. The waterproof layer of the package of the modified example is a water-repellent coating layer formed by applying a water-repellent coating agent to the outside of the paper layer 25.

10: Package 11: Package 20: Base material 20A: Upper layer 20B: Lower layer 21: Innermost layer 22: Barrier layer 23: Peeling layer 24: Polyolefin-based or polyester-based resin layer
25: Paper layer 26: Waterproof layer 30: Film 30X: Part of the film that is not in close contact with the content 100 30Y: Part of the innermost layer 31 that faces the content 100 31: Innermost layer 32: First adhesion Layer 33: Barrier layer 34: Second adhesive layer 35: Intermediate layer 36: Outermost layer 41: Peeling piece 42: Hinging part 43: Notch 50: Easy peeling layer
60: Base material 60A: Upper layer 60B: Lower layer 61: Release layer that also functions as a barrier layer

Claims (2)

With a base material, a film, and contents,
The base material and the film are joined so that the contents are sealed.
The base material includes an upper layer portion that can be seen through and a lower layer portion that cannot be seen through, and an easily peelable layer is provided between the upper layer portion and the lower layer portion.
The base material has a hinge portion and a peeling piece formed by a notch in the lower layer portion made by leaving the hinge portion and peeled off via the easily peelable layer.
A package characterized by that. The package according to claim 1, wherein the upper layer portion of the base material includes at least a barrier layer.

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