JP7439507B2 - packaging - Google Patents

Description

The present invention relates to a package for packaging contents.

BACKGROUND ART A packaging body is known in which the article is placed on a mount and the mount is bonded to a film using a heat-sensitive adhesive, thereby packaging the article on the mount and skin-packing it. Patent Document 1 discloses an example of the structure of a conventional skin pack package.

JP2019-51944A

The above package does not take into consideration heating the package in an unopened state when the article is a food product. Therefore, there is room for improvement in the convenience of the package structure.

(1) The package according to the present invention includes a base material, a film that covers the contents placed on the base material, and an easy-peel structure that connects the base material and the film so that the contents are sealed. and a vapor passage part that releases steam generated from the contents, and the seal strength in the vapor passage part is weaker than the seal strength in the easy peel structure.
According to the above package, the sealing strength of the vaporizing part is weaker than that of the part with the easy-peel structure, so when the internal pressure of the package increases, the vaporizing part opens while the easy-peel structure is maintained. do. Therefore, there is no need for the user to provide an opening to suppress an increase in the internal pressure of the package, such as making a hole in the film during heat treatment using a microwave oven, and the convenience of the package is improved.

(2) In a preferred example, the vapor passage section is provided between the base material and the film.
According to this package, steam from the contents can be suitably released to the outside.

(3) In a preferred example, the seal strength in the vapor passage section is within a range of 0 N/15 mm or more to 1 N/15 mm.
According to this package, the seal strength in the steam passage part is set within an appropriate range, so that the steam passage part opens easily during heat treatment.

(4) In a preferred example, the vapor passage portion is constituted by a cutout in the base material and the film that are combined by the easy-peel structure.
According to this package, since the base material and film are not present in the vapor passage portion, steam from the contents can be suitably released to the outside.

(5) In a preferred example, the base material includes a paper layer.
According to this package, the shape of the base material is easily maintained.

(6) In a preferred example, the paper layer has a basis weight of 100 g/m ² to 1000 g/m ² .
According to this package, the shape of the base material is maintained more appropriately.

(7) In a preferred example, when the content is sealed in the package, a first distance between the vapor passage section and the content is shorter than a second distance between the easy-peel structure and the content. .
According to this package, since the position of the vapor passage portion is close to the contents, an increase in the internal pressure of the package is suppressed. Therefore, tearing of the film of the package is suppressed.

According to the package related to the present invention, convenience can be improved.

FIG. 2 is a perspective view of the package of the first embodiment. FIG. 2 is a sectional view taken along line D2-D2 in FIG. 1. FIG. 2 is a cross-sectional view showing the layer structure of the base material in FIG. 1. FIG. FIG. 2 is a cross-sectional view showing the layer structure of the film of FIG. 1. FIG. 2 is a plan view showing the easy-peel structure of the package shown in FIG. 1 and the position of a vapor ventilation section. FIG. 3 is a perspective view of a package according to a second embodiment. The perspective view of the package of a comparative example. Table showing test results of Examples and Comparative Examples.

(First embodiment)
The package 10 of the first embodiment will be described with reference to FIGS. 1 to 5. The package 10 shown in FIG. 1 is configured to be able to package various contents 100. Contents 100 are arbitrarily selected by the user. In the first example, the contents 100 are foodstuffs. Food products are, for example, fresh foods and processed foods. In the second example, the content 100 is an article. The articles are, for example, stationery and daily necessities. In the example shown in FIG. 1, the contents 100 are foodstuffs.

The main elements constituting the package 10 are the base material 20 and the film 30. The base material 20 has a configuration suitable for placing the contents 100 thereon. The film 30 has a configuration suitable for packaging the contents 100 placed on the base material 20. Any packaging form can be selected as the packaging form of the package 10. The first example is skin pack packaging in which the base material 20, the film 30, and the contents 100 are packaged in close contact with each other by heating the film 30 with heat. The second example is vacuum pack packaging in which air is removed from the interior space made up of the base material 20 and the film 30. In skin pack packaging, substantially no space is formed between the base material 20 and the portion of the film 30 that is not in close contact with the contents 100. In vacuum packaging, some space is formed between the base material 20 and the portion of the film 30 that is not in close contact with the contents 100. In the example shown in FIG. 1, the packaging form of the package 10 is skin pack packaging. According to skin pack packaging, since no internal space is formed, when the contents 100 are foodstuffs, liquid generated from the foodstuffs is difficult to flow out. Therefore, the freshness and appearance of foodstuffs can be maintained in a suitable state for a long period of time. Furthermore, since the contents 100 do not move relative to the base material 20, there are fewer restrictions on how the package 10 can be displayed.

The shape of the base material 20 is arbitrarily selected depending on the type and size of the contents 100. In the example shown in FIG. 1, the base material 20 has a rectangular shape suitable for placing the contents 100, ie, food products. The shape of the base material 20 may be a triangle, a square, a polygon of pentagon or more, a circle, or an ellipse. The size of the base material 20 is set according to the contents 100. Preferably, the area of the base material 20 when viewed in plan is at least twice the area of the content 100 when viewed in plan.

Base material 20 includes a plurality of layer configurations. The base material 20 shown in FIG. 3 includes an innermost layer 21, a barrier layer 22, a bonding layer 23, a paper layer 24, and an outermost layer 25. Each layer constituting the base material 20 is laminated by any means. In one example, each layer constituting the base material 20 is laminated by a dry lamination method.

The innermost layer 21 is laminated at the innermost position of the base material 20, in other words, at the position closest to the contents 100. The contents 100 are placed on the innermost layer 21. Innermost layer 21 is comprised of a material that is easily peelable when sealed with innermost layer 31 of film 30 (see FIG. 4). Preferably, the innermost layer 21 is made of a material that has a waterproof function. Therefore, water that has flowed out from the contents 100 is unlikely to leak. The material constituting the innermost layer 21 is, for example, polyethylene. The thickness of the innermost layer 21 is selected to be sufficient for waterproof function. The thickness of the innermost layer 21 is, for example, 55 μm.

Barrier layer 22 is laminated on the side opposite to content 100 with respect to innermost layer 21 . Therefore, when the content 100 contains water, the water seeping out from the content 100 is difficult to penetrate into the paper layer 24. Therefore, the strength of the base material 20 is maintained. Below, the side opposite to the contents 100 with respect to any layer may be referred to as the outside. The barrier layer 22 is made of a material that is excellent in at least one of gas barrier properties and moisture barrier properties. Therefore, the quality of the contents 100 is maintained well over a long period of time. In this embodiment, the barrier layer 22 is made of a material with excellent gas barrier properties and moisture barrier properties. The material constituting the barrier layer 22 is, for example, polyethylene terephthalate on which a thin inorganic film of aluminum oxide or silicon oxide is deposited. The gas whose permeation is suppressed by the barrier layer 22 is, for example, oxygen. The thickness of the barrier layer 22 is selected to be sufficient for gas barrier properties and moisture barrier properties. The thickness of the barrier layer 22 is, for example, 12 μm.

For example, the bonding layer 23 is laminated on the outside of the barrier layer 22. The bonding layer 23 is made of a material that can bond the barrier layer 22 and the paper layer 24 together. The material constituting the bonding layer 23 is, for example, ethylene-methacrylic acid copolymer resin (EMAA resin). The thickness of the bonding layer 23 is selected to be sufficient for bonding the barrier layer 22 and the paper layer 24. The thickness of the bonding layer 23 is, for example, 20 μm.

For example, the paper layer 24 is laminated on the outside of the bonding layer 23. The material constituting the paper layer 24 is, for example, non-recycled paper. The basis weight that contributes to the thickness of the paper layer 24 can be arbitrarily selected. The basis weight of the paper layer 24 is preferably determined based on the relationship between the resistance of the base material 20 to warping when the base material 20 and the film 30 are joined and the thickness of the package 10. A preferred example of the maximum basis weight of the paper layer 24 is 1000 g/m ² . When the basis weight of the paper layer 24 is 1000 g/m ² or less, the thickness of the package 10 does not become too thick. Therefore, the display space for the package 10 can be reduced. Moreover, the cost of the package 10 can be reduced. A preferred example of the minimum basis weight of the paper layer 24 is 100 g/m ² . When the basis weight of the paper layer 24 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. An example of a preferable range for the basis weight of the paper layer 24 is 100 g/m ² or more and 1000 g/m ² or less. In one example, the paper layer 24 has a basis weight of 450 g/m ² .

The outermost layer 25 is laminated on the outside of the paper layer 24. The outermost layer 25 is made of a material that has a waterproof function. Therefore, even if dew condensation occurs, water is difficult to penetrate into the paper layer 24. Therefore, the strength of the base material 20 is maintained. The material constituting the outermost layer 25 is, for example, polyethylene. The thickness of the outermost layer 25 is selected to be sufficient to prevent water from penetrating into the paper layer 24. The thickness of the outermost layer 25 is, for example, 20 μm.

Film 30 includes multiple layer configurations. Preferably, the plurality of layers are made of transparent material so that the contents 100 can be visually recognized. The film 30 shown in FIG. 4 includes an innermost layer 31 , a first adhesive layer 32 , a barrier layer 33 , a second adhesive layer 34 , an intermediate layer 35 , and an outermost layer 36 . Each layer of the film 30 is laminated by any means. In one example, the layers constituting the film 30 are laminated by a coextrusion method.

The innermost layer 31 is laminated at the innermost position of the film 30, in other words, at the position closest to the contents 100. When the packaging form of the package 10 is a skin pack or a vacuum pack, the portion of the innermost layer 31 facing the contents 100 is in close contact with the contents 100, as shown in FIG. The innermost layer 31 is made of a material that can be easily peeled when sealed with the innermost layer 21 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 selected to be suitable for easy peeling. The thickness of the innermost layer 31 is, for example, 30 μm.

The first adhesive layer 32 is, for example, laminated on the outer side of the innermost layer 31. 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, an adhesive resin in which adhesive functional groups are polymerized. The thickness of the first adhesive layer 32 is selected to be suitable for adhesion between the innermost layer 31 and the barrier layer 33. The thickness of the first adhesive layer 32 is, for example, 5 μm.

For example, the barrier layer 33 is laminated on the side opposite to the content 100 with respect to the first adhesive layer 32. The barrier layer 33 is preferably made of a material that is excellent in at least one of gas barrier properties, oil resistance, and moisture resistance. The material constituting the barrier layer 33 is, for example, ethylene-vinyl alcohol copolymer (EVOH). The gas whose permeation is suppressed by the barrier layer 33 is, for example, oxygen. The thickness of the barrier layer 33 is selected to be suitable for achieving at least one of gas barrier properties, oil resistance, and moisture resistance. The thickness of the barrier layer 33 is, for example, 30 μm.

The second adhesive layer 34 is laminated on the outside of the barrier layer 33. 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, an adhesive resin in which adhesive functional groups are polymerized. The thickness of the second adhesive layer 34 is selected to be suitable for adhesion between the barrier layer 33 and the intermediate layer 35. The thickness of the second adhesive layer 34 is, for example, 5 μm.

The intermediate layer 35 is laminated on the outside of the second adhesive layer 34 . The intermediate layer 35 is preferably made of a material that is excellent in at least one of toughness and wear resistance. The material constituting the intermediate layer 35 is, for example, polyamide. The thickness of the intermediate layer 35 is selected to be suitable for achieving at least one of toughness and wear resistance. The thickness of the intermediate layer 35 is, for example, 30 μm.

The outermost layer 36 is laminated on the outside with respect to the intermediate layer 35. The outermost layer 36 is preferably made of a material that is excellent in at least one of heat resistance, gas barrier properties, moisture resistance, strength, and transparency. The material constituting the outermost layer 36 is, for example, polyester. The thickness of the outermost layer 36 is selected to be suitable for at least one of heat resistance, gas barrier properties, moisture resistance, strength, and transparency. The thickness of the outermost layer 36 is, for example, 50 μm.

The base material 20 and the film 30 are bonded by any means. In one example, the base material 20 and the film 30 are coupled by an easy-peel structure 40. The easy-peel structure 40 is a structure in which the innermost layer 21 of the base material 20 and the innermost layer 31 of the film 30 are sealed. The easy-peel structure 40 is constructed by heating the base material 20 and the film 30 from which the easy-peel structure 40 can be constructed based on heating conditions. The heating conditions include heating time and heating temperature. An example of the heating time is 20 seconds. An example of the heating temperature is 150 degrees. The sealing strength of the easy-peel structure 40 portion is set to such an extent that it can be easily peeled off by the user, and to such an extent that it will not come off naturally during transportation or display. In one example, the seal strength of the easy peel structure 40 is 1.0 N/15 mm or more. When the seal strength of the easy-peel structure 40 is 1.0 N/15 mm or more, the film 30 is difficult to peel off from the base material 20 even when standard stress is applied to the package 10 during transportation and display. In one example, the seal strength of the easy peel structure 40 is 5.0 N/15 mm or less. When the seal strength of the easy-peel structure 40 is 5.0 N/15 mm or less, the user can easily peel off the film 30 from the base material 20 by applying a standard force to peel off the package 10. An example of the seal strength of the easy peel structure 40 is 2.0 N/15 mm.

The peeling type of the easy-peel structure 40 includes at least one of a cohesive peeling type, an interlayer peeling type, and an interfacial peeling type. Preferably, the easy-peel structure 40 is provided in a portion including the end 20A of the base material 20 and the end 30A of the film 30.

The package 10 further includes a vapor ventilation section 50 that releases steam released from the contents 100 to the outside. An example of the steam released from the steaming section 50 to the outside is water vapor generated when the contents 100 are heated. An example of heat treatment is heating in a microwave oven. The vapor passage section 50 is formed, for example, between the innermost layer 21 of the base material 20 and the innermost layer 31 of the film 30. The seal strength in the vapor passage section 50 is weaker than the seal strength in the easy peel structure 40. The vapor passage portion 50 opens by being peeled off more easily than the easy-peel structure 40 portion as the internal pressure of the internal space increases due to the generation of water vapor during the heat treatment of the package 10. The steaming section 50 releases water vapor generated from the contents 100 to the outside, thereby reducing the internal pressure of the internal space and suppressing damage to the film 30. The seal strength in the vapor passage section 50 is configured to be 1.0 N/15 mm or less.

A method for forming the vapor passage section 50 will be explained. The vapor passage section 50 is formed by at least one of the formation methods of the first to third examples shown below. In the first example, when the base material 20 and the film 30 are joined by the easy-peel structure 40, a paint containing a component that weakens the sealing strength is applied to the innermost layer 21 of the base material 20 corresponding to the vapor passage section 50. do. In one example, the paint is a release varnish containing silicone or wax. In the second example, the innermost layer 21 of the base material 20 corresponding to the vapor passage section 50 is processed to weaken the seal strength. Examples of processing treatments are embossing and debossing. By adjusting the paint and the degree of processing, the seal strength in the vapor passage section 50 may be configured to vary depending on the location. In the third example, the base material 20 and the film 30 are combined using the easy-peel structure 40, and the base material 20 and the film 30 are cut out according to the shape of the vapor passage section 50. The sealing strength in the vapor passage section 50 of the first example is, for example, 0N/15mm. The seal strength in the vapor passage section 50 of the second example is, for example, 0.5 N/15 mm. The seal strength in the vapor passage section 50 of the third example is 0N/15mm.

An appropriate shape of the vaporizing section 50 is selected depending on the configuration of the contents 100. Preferably, the vapor passage portion 50 is provided with an end portion 50A that has the shortest distance to the contents 100 when the base material 20 is viewed from above. In one example, the shape of the vaporizing section 50 is a pentagonal shape. An end portion 50A of the pentagonal vapor passage portion 50 faces the contents 100. In another example, the shape of the vaporizing section 50 is semicircular.

The position of the vapor passage section 50 in the package 10 will be explained. When the contents 100 are housed in the package 10, the first distance D1 between the contents 100 and the vaporizing section 50 is shorter than the second distance D2 between the contents 100 and the easy-peel structure 40. It is configured as follows. In one example, the first distance D1 is between an arbitrary point P1 on the line L where the base material 20, the film 30, and the contents 100 of the packaged body 10 packaged in a skin pack are in contact with each other, and the end 50A of the vaporizing section 50. It is the shortest distance between The second distance D2 is, for example, the shortest distance between any point P2 on the line L and the end 40A of the easy-peel structure 40. In one example, the first distance D1 is 10 mm. The second distance D2 is 40 mm. Preferably, when the package 10 is viewed in plan as shown in FIG. Preferably, the configuration is configured. It is preferable that the vapor passage section 50 is provided on a longitudinal side of the base material 20 formed in a rectangular shape. In FIG. 5, the dotted portion indicates the seal portion. The shade of the dots represents the seal strength. Areas where the dots are thinner have weaker sealing strength than areas where the dots are darker.

The size and number of the steaming sections 50 are arbitrarily set depending on the size of the base material 20 and the configuration of the contents 100. The configuration of the content 100 includes at least one of the type, size, and water content of the content 100. In one example, when the content 100 has a high water content, the vapor passage portion 50 is formed to be large. Forming the vaporizing section 50 to be large includes forming the area occupied by the vaporizing section 50 to be large relative to the area of the portion including the easy-peel structure 40 when the package 10 is viewed from above. In one example, two steaming sections 50 are provided in the package 10. One or more than two steaming sections 50 may be provided.

The operation of the package 10 of the first embodiment will be explained. The user heats the package 10 containing the contents 100 using a heating means such as a microwave oven. The internal pressure of the package 10 increases due to the water vapor generated from the contents 100 as it is heated. The increase in the internal pressure of the package 10 causes the easy-peel structure 40 to be uncoupled from the vicinity of the contents 100. When the bonding of the easy-peel structure 40 reaches the vapor passage section 50, water vapor is released from the vapor passage section 50 from the outside. By releasing the water vapor to the outside, an increase in the internal pressure of the package 10 is suppressed.

(Second embodiment)
With reference to FIG. 6, the package 10 of the second embodiment will be described. Configurations that are common to the package 10 of the first embodiment are given the same reference numerals as those of the package 10 of the first embodiment, and overlapping explanations may be omitted. The package 10 of the second embodiment is different from the package 10 of the first embodiment in the configurations of the innermost layer 21, the innermost layer 31, and the ventilation section 50.

The innermost layer 21 of the base material 20 in the package 10 of the second embodiment is composed of an easy-peel film. The thickness of the innermost layer 21 is selected to be suitable for easy peeling. In one example, the thickness of the innermost layer 21 is 50 mm. The innermost layer 31 of the film 30 in the package 10 of the second embodiment is made of polyethylene. In one example, the thickness of the innermost layer 31 is 30 mm.

In the package 10 of the second embodiment, the vapor passage portions 50 are provided at different locations on the base material 20. In one example, the vapor passage section 50 is provided on a transverse side of the rectangular base material 20. The first distance D1 between the contents 100 and the vaporizing section 50 is configured to be shorter than the second distance D2 between the contents 100 and the easy-peel structure 40.

According to the package 10 of the second embodiment, the following effects can be further obtained.
Since the innermost layer 21 of the base material 20 is composed of an easy-peel film, it is possible to use a general film in which the innermost layer 31 of the film 30 is composed of polyethylene. Therefore, the number of options available to the user when selecting the film 30 increases.

(Example)
The inventor of the present application conducted a comparative test using the package 10 of the example and the comparative example shown in FIG. The package 10 of the comparative example is the same as the package 10 of the first embodiment and the package 10 of the second embodiment except that it does not include the vaporizing section 50. In the comparative test, the vapor permeability and easy peelability of the package 10 were evaluated. The evaluation of vapor permeability is performed by determining whether or not steam is released from the package 10 during heat treatment. Judgment as to whether steam is released or not is determined visually by the tester. The evaluation of easy peelability determines whether it can be easily peeled off by the tester's hands. The determination as to whether or not it can be easily removed is based on the tester's declaration.

In this comparative test, the packages 10 of Examples 1 to 6 and the packages 10 of Comparative Examples 1 and 2 were used. The package 10 of Example 1 is the package 10 of the first embodiment, and the vapor passage part 50 is created by the forming method of the first example. The package 10 of Example 2 is the package 10 of the second embodiment, and the vapor passage part 50 is created by the formation method of the first example. The package 10 of Example 3 is the package 10 of the first embodiment, and the vapor passage part 50 is created by the forming method of the second example. The package 10 of Example 4 is the package 10 of the second embodiment, and the vapor passage part 50 is created by the formation method of the second example. The package 10 of Example 5 is the package 10 of the first embodiment, and the vapor passage part 50 is created by the formation method of the third example. The package 10 of Example 6 is the package 10 of the second embodiment, and the vapor passage part 50 is created by the formation method of the third example. The package 10 of Comparative Example 1 is composed of the base material 20 and film 30 of the first embodiment, and the vapor passage section 50 is not formed. The package 10 of Comparative Example 2 is composed of the base material 20 and film 30 of the second embodiment, and the vapor passage section 50 is not formed. In the packages 10 of Examples 1 to 6 and the packages 10 of Comparative Examples 1 and 2, 400 grams of meat was packaged as the content 100 under predetermined heating conditions. Ten packages 10 of Examples 1 to 6 and ten packages 10 of Comparative Examples 1 and 2 were each prepared and subjected to a comparative test.

The results of the comparative test will be explained with reference to FIG. The packages 10 of Examples 1 to 6 and the packages 10 of Comparative Examples 1 and 2 all had easy peel properties. The packaging bodies 10 of Examples 1 to 6 were all confirmed to have vapor permeability, as release of water vapor from the vapor permeable portion 50 was observed during the heat treatment. Eight of the packages 10 of Comparative Example 1 and Comparative Example 2 were confirmed to have vapor permeability, but in two packages 10, the film 30 was torn and punctures occurred. One of the causes is that the internal pressure increased due to water vapor generated from the contents 100 during the heat treatment. If the film 30 is torn, the contents 100 and the liquid components generated from the contents 100 may spill out. In the packages 10 of Examples 1 to 6, water vapor escapes from the vapor passage section 50, thereby suppressing the possibility that the film 30 will be torn due to an increase in the internal pressure of the package 10.

(Modified example)
The description regarding each embodiment is an illustration of the form that the package according to the present invention can take, and is not intended to limit the form. In addition to each embodiment, the package according to the present invention may take a form in which, for example, a modification of each embodiment shown below or a combination of at least two modifications that are not mutually contradictory.

- In the first embodiment and the second embodiment, the layer structure of the base material 20 can be changed arbitrarily. The base material 20 of the package 10 of the modified example further includes a printed layer that displays an explanation regarding the contents 100 and the like. The position where the printed layer is provided on the base material 20 can be arbitrarily selected. In one example, the printed layer is provided between the barrier layer 22 and the innermost layer 21. In another example, the printed layer is provided between barrier layer 22 and bonding layer 23.

- In the first embodiment and the second embodiment, the configuration of the paper layer 24 can be arbitrarily changed. The paper layer 24 of the modified package 10 includes at least one of a sizing agent and a waterproofing agent. The sizing agent is added to the paper when the paper forming the paper layer 24 is made. The waterproofing agent is applied to the paper forming the paper layer 24. In the package 10 of this modification, since the paper layer 24 includes a waterproof function, the outermost layer 25 can be omitted, for example.

- In the first embodiment and the second embodiment, the configuration of the outermost layer 25 can be changed arbitrarily. The outermost layer 25 of the modified package 10 is a water-repellent coating layer formed by applying a water-repellent coating agent to the outside of the paper layer 24.

DESCRIPTION OF SYMBOLS 10...Package body 20...Base material 24...Paper layer 30...Film 40...Easy peel structure 50...Vapourization part 100...Contents D1...First distance D2...Second distance

Claims (6)

a base material including a paper layer ;
a film that includes a covering part that covers the content in a state that is deformed to match the shape of the content placed on the base material, and a bonding part that is coupled to the base material ;
an easy-peel structure that connects the base material and the connecting portion so that the contents are sealed;
and a steaming section that releases steam generated from the contents,
The seal strength in the vapor passage section is weaker than the seal strength in the easy peel structure. The package according to claim 1, wherein the vapor passage section is provided between the base material and the film. The package according to claim 1 or 2, wherein the seal strength in the vapor passage portion is within a range of 0 N/15 mm or more to 1 N/15 mm. The package according to claim 1, wherein the vapor passage portion is configured by a cutout in the base material and the film that are combined by the easy-peel structure. The paper layer has a basis weight of 100 g/m ² to 1000 g/m ²
The package according to any one of claims 1 to 4 . When the content is sealed in the package, a first distance between the vapor passage part and the content is shorter than a second distance between the easy-peel structure and the content.
The package according to any one of claims 1 to 5 .