JP2005289423A - Container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container which is applicable under a wide range of temperatures, is capable of absorbing an inner pressure change even when the container has a head space, and has superior easy peelable unsealability. <P>SOLUTION: The container comprises a container body, an inner lid, and an outer lid. The inner lid located on the container body side is of a drop-lid that is flexible enough to be deformed with inner pressure change inside the container. A flange of the container body and the inner lid, and the inner lid and the peripheral end of the outer lid outside the container body are sealed together, respectively. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a container having excellent sealing properties. More specifically, the present invention relates to a container that can be applied to a wide temperature range from chilled to hot warmer, hot water bath, microwave oven heating, etc., and can absorb changes in the internal pressure of the container even if there is a head space.

Conventionally, when heat sterilization is performed in a sealed state, a so-called drop lid has been used to prevent the pressure inside the container from increasing and the lid or the container from being deformed, and also to prevent the contents from scattering when opened. Has been used.
However, if heat-sealed contents of food containing moisture etc. are attached to the lip part, the pinhole or seal surface may be damaged at the time of heat sealing. In order to prevent inconvenience, a container is disclosed in which a drop lid is formed of a laminated material having an upper layer made of a material having a melting point higher than that of the container body (for example, Patent Document 1).

When using a drop lid to make the adhesion between layers stronger, in order to make opening easier, the lid is provided with a downward projecting part along the cup-shaped side wall and heat sealed outside this projecting part An easy-open molded container having a surface is disclosed (for example, Patent Document 2).
In addition, in order to reinforce the heat seal portion as a drop lid, the lid flange of the drop lid comprising a decompression absorbing portion, a fitting portion to the container main body, and a flange portion of the lid body installed on the flange portion on the upper edge of the container main body A dropping lid is disclosed in which a sheet-like flange portion is formed by sticking a heat-sealable film thinner than the dropping lid flange portion on the periphery of the portion (for example, Patent Document 3).

In order to suppress the scattering of the contents generated at the time of opening while maintaining the opening property and the storage property, a container provided with an air-containing portion in the vicinity of the opening portion is disclosed (for example, Patent Document 4).
In addition, in order to eliminate the head space of the heat sterilization container and enable full filling, in the lid material comprising the heat resistant polyester layer as the uppermost layer and the polyolefin sealant layer as the innermost layer, the opening tab portion of the flange portion is provided. Disclosed is a plastic drop lid having a structure in which a bent portion or a groove portion and a flange portion are provided with a folding portion, and the drop lid portion is provided with a circular or square concave portion having a slightly recessed portion of 1.5 to 2.5 mm. (For example, Patent Document 5).

  Furthermore, it consists of a gas-impermeable film and a peelable gas-permeable film so that it can be stored in a low-oxygen environment during long-term storage, such as meat, and placed in a relatively high oxygen atmosphere when sold to consumers. A package having a double film lid and capable of peeling and removing the gas impermeable film before display is disclosed (for example, Patent Document 6).

Japanese Utility Model Publication No. 56-75168 JP-A-60-110658 Japanese Utility Model Publication No. 62-17421 JP 2000-43938 A Japanese Patent Laid-Open No. 7-2276 Special Table 2000-505765

In the above-mentioned Patent Documents 1 to 5, since a drop lid is used, it is inferior in decorating properties such as printability and is not good in appearance, and prevention of deformation of the lid or the container due to an increase in pressure in the container due to temperature change, A container having both functions of drop resistance is not disclosed.
Moreover, in patent document 6, although it has gas barrier property, it is a packaged product in which the deformation | transformation prevention at the time of use at the time of a heating is not considered.
An object of the present invention is to solve the above-mentioned problems, and to provide a container that can be applied to a wide temperature range, can absorb a change in the internal pressure of the container by the inner lid even if there is a head space, and is excellent in easy peel openability. To do.

  The present invention is a container composed of a container body, an inner lid and an outer lid, the inner lid located on the container body side is a flexible drop lid that can be deformed following the internal pressure change inside the container, The container is characterized in that the flange portion and the inner lid of the container body are sealed, and the peripheral ends of the inner lid and the outer lid outside the container body are sealed.

In the present invention, further (1) communicating the space formed by the inner lid and the outer lid with the outside air,
(2) The seal part between the inner lid and the flange part is an easily peelable seal part,
(3) In the above (2), the seal part of the inner lid and the outer lid is a hardly peelable seal part, and is formed at a position partially overlapping with the flange part and the easily peelable seal part of the inner lid, and the easily peelable seal part The inner edge of is located closer to the center than the inner edge of the hard-to-peel seal part,
(4) The seal part between the inner lid and the outer lid is an easily peelable seal part. (5) The inner lid has a barrier property.
Is desirable.

  The container comprising the container body of the present invention and the inner lid and outer lid can be applied to a wide temperature range such as hot warmers, hot water baths, microwave heating, etc. The use of the outer lid protects the sealing performance of the inner lid located on the container body side, imparts drop resistance, and is excellent in appearance. Moreover, it is a container which can provide the outstanding easy peel openability.

  The container of the present invention is a container composed of a container body, an inner lid and an outer lid, and the inner lid located on the container body side is a flexible drop lid which can be deformed following the internal pressure change inside the container. Yes, the flange portion and the inner lid of the container main body, and the inner lid and the peripheral end portion of the outer lid outside the container main body are respectively sealed.

An example of the container of the present invention will be described with reference to FIG.
In FIG. 1 which shows an example of the container of this invention, a container is comprised from the container main body 1, the inner cover 5 of the container main body side, and the outer cover 6 of the container main body outer side. The container body 1 has a side wall portion 2 and a bottom portion 3 formed in a cup shape, and a flange portion 4 is formed at an opening end portion of the side wall portion 2. The flange portion and the inner lid of the container main body, and the peripheral ends of the inner lid and the outer lid are sealed.
In the container of the present invention, the inner lid 5 on the container body side is a flexible drop lid that can be deformed following changes in the internal pressure of the container, and the inner lid 5 and the outer lid on the outside of the container body. By forming the space portion 7 between the first and second chambers 6 and 6, as shown in FIGS.

In the container of the present invention, for example, as shown in FIGS. 4 and 6, a vent hole 8 is provided as a ventilation means at the center of the outer lid 6 outside the container body 1, and is formed by the inner lid 5 and the outer lid 6. By connecting the space portion and the outside air, the inner lid 5 in the form of the drop lid can be further easily deformed following the change in the container internal pressure.
The vent hole 8 prevents moisture and the like from entering the space 7 of the inner lid 5 and the outer lid 6 through the vent hole 8 when the contents after filling and sealing are sterilized by retort or boil sterilization. It may be in a closed state and may be opened when a certain internal pressure or more is generated in the space 7 during distribution, hot water bathing, microwave heating, or the like.
In addition, as said ventilation | gas_flowing means, you may provide as a non-seal part in the seal part 10 of the inner cover 5 and the outer cover 6, for example, an easily peelable seal part in the said seal part 10, and the shape of a mouth opening toward a container inner side A groove-shaped weakening portion or the like may be provided in the seal portion or the outer lid 6 so that the internal air is communicated with the outside air when an internal pressure is generated in the space portion 7 between the inner lid 5 and the outer lid 6.

In the container of the present invention, the flange portion 4 of the container body 1 and the seal portion 9 of the inner lid 5 on the container body side are provided with an easily peelable seal portion, and the seal portion 10 of the inner lid 5 and the outer lid 6 outside the container body is provided. By using the hardly peelable seal portion, the two lids F can be easily peeled off from the seal portion 9 as shown in FIG. 5 and the contents in the container can be easily taken out.
Here, the easy peel seal and the hard peel seal may be used with relative seal strength, and the distinction is not unambiguous. However, in general, the easy peel seal is easy by hand. The seal strength that can be opened is 20N or less, and the hard-to-peel seal means the seal strength that exceeds 20N.
In the container of the present invention, when the rigidity of the container main body 1 is relatively low, even if the seal part 9 between the flange part 4 and the inner lid 5 of the container main body 1 is an easily peelable seal part, the flange accompanying the side drop Deformation of the portion 4 is prevented by the outer lid 6 sealed to the inner lid 5 through a hard-to-peel seal portion, and the container can be effectively prevented from being damaged or sealed. When the outer lid 6 is not provided, the flange portion 4 is greatly deformed due to a side drop, the container body 1 is damaged, or the easily peelable seal between the flange portion 4 and the inner lid 5 is peeled off. There is a risk.

Furthermore, the easily peelable seal part (seal part 9) and the hardly peelable seal part (seal part 10) are formed in a partially overlapping position, and the inner edge 11 of the easily peelable seal part 9 is formed as the hardly peelable seal part 10. It is desirable to position it inside the inner edge 12.
At this time, the position of the inner edge 11 of the easily peelable seal portion 9 is preferably 0.3 to 10 mm, particularly preferably 0.5 to 5 mm, on the center side of the inner edge 12 of the hardly peelable seal portion 10. And the thickness of the inner lid 5 on the container body side constituting the drop lid 5 is preferably 30 to 300 μm, particularly preferably 50 to 200 μm, in terms of heat sealability and heat seal position regulation, And desirable from the viewpoint of the sealing performance and easy opening.
In FIG. 2 to FIG. 4 showing a state in which a peeling force from the inside acts on the sealing portion, the peeling force due to the container internal pressure first acts on the inner lid 5, but the inner lid 5 follows the container internal pressure. 2 and 3, the gas pressure in the space 7 between the inner lid 5 and the outer lid 6 acts on the outer lid 6, and in FIG. 4, the inner lid 5 directly acts on the outer lid 6 by pushing the outer lid 6. To do. Furthermore, the peeling force or destructive force P acting on the outer lid 6 is because the inner edge 11 of the easily peelable seal portion 9 is located closer to the center than the inner edge 12 of the hardly peelable seal portion 10. It acts on the hard-to-peel seal part and can withstand a large peeling force or breaking force such as 23 N / 15 mm or more.

At the time of opening, as shown in FIG. 5, a knob T is provided on two lids composed of an inner lid 5 and an outer lid 6 so as to protrude to the outside of the container. When the gripping portion T of the lid is gripped and pulled upward so that the peeling force from the outside acts on the easy-peeling seal portion 9 serving as the opening portion, the peeling force P ′ is applied to the easy-peelable sealing portion 9. Acts and can be easily peeled open by hand. In this case, considering that only the outer lid 6 is gripped and pulled upward, the outer edge 13 of the easily peelable seal portion 9 is connected to the outer edge of the hardly peelable seal portion 10 as shown in FIG. It is desirable to be located at the same position as the edge 14 or closer to the center of the container than that.
Although not shown in the drawings, when the knob T is provided only on the outer lid 6 on the outer side of the container body and the knob T is not provided on the inner lid 5 at the opening start portion, the outer edge of the easily peelable seal portion 9 is similarly provided. 13 is positioned at the same position as the outer edge 14 of the hardly peelable seal portion 10 or closer to the center of the container than the outer edge 14, and when the grip portion T of the outer lid 6 is gripped and pulled upward, The force P ′ acts on the easily peelable seal portion (seal portion 9), and can be easily peeled open.
Further, when the knob portion T is provided only on the inner lid 5 located on the container body side and the knob portion T is not provided on the outer lid 6 outside the container body, the outer edge 13 of the easily peelable seal portion 9 is hardly peeled off. The positional relationship with the outer edge 14 of the peelable seal portion 10 is not particularly limited, and when the grip portion T of the inner lid 5 is gripped and pulled upward, the peel force P ′ is similarly changed to the easily peelable seal portion (seal Acts on the part 9) and can be easily peeled open by hand.
Thus, according to the container of the present invention, the positions of the easily peelable seal part (seal part 9) and the hardly peelable seal part (seal part 10), and the inner edge and the outer edge thereof are regulated. By doing so, it is possible to simultaneously provide high sealing strength and easy-openability that can withstand an increase in internal pressure and a drop impact without forming a groove-like score or the like on the container body or the lid.

On the other hand, when the rigidity of the container body 1 is relatively high, the deformation of the flange portion 4 due to the side surface drop is small, and between the flange portion 4 and the inner lid 5, and between the inner lid 5 and the outer lid 6 generated along with the deformation. Since the peel force acting on each of the seal portions becomes small, the seal portion 10 between the inner lid 5 and the outer lid 6 can be made an easily peelable seal portion according to the degree.
In this case, as illustrated in FIG. 6, when other contents M or the like are stored in the space portion 7 located between the inner lid 5 and the outer lid 6, only the outer lid 6 is peeled off, Other contents in the space 7 can be easily taken out.
Further, when the content in the container is a beverage, it is possible to peel off the outer lid 6 and stab the inner lid 5 with a straw or the like for drinking.
In addition, as illustrated in FIG. 7, the outer lid 6 may be provided with the knob 15 and the easy tear portion 16, and only the outer lid 6 may be torn to take out other contents in the space portion 7.

  In the container of the present invention, it is desirable to impart barrier properties to the aforementioned inner lid 5 on the container side because it can add functionality to the container. Examples of the barrier properties in this case include gas barrier properties such as oxygen barrier and water vapor barrier, flavor barrier properties, and barrier properties such as light barrier properties such as ultraviolet rays.

[Container material]
The container body 1 used in the present invention is not particularly limited, and any material known per se can be used. For example, the container body 1 can be formed from resin, metal foil, paper, glass, ceramics, or a laminate thereof. In addition, the cross-sectional shape is not limited to a circle, but may be an arbitrary shape such as a triangle or a square shape of quadrilateral or more.
The container body can be formed from a resin alone. However, in the case of a metal foil such as an aluminum foil, a steel foil, or a tin foil, at least a resin having a heat sealing property is heat-sealed on the entire inner surface of the container or on a flange. Need to be laminated to the surface.
Examples of the resin having heat sealability include low, medium and high density polyethylene (PE), isotactic polypropylene, propylene-ethylene copolymer, ethylene-vinyl acetate copolymer, ethylenically unsaturated carboxylic acid or the like. Examples thereof include olefin resins such as olefin resins graft-modified with anhydrides, relatively low melting point or low softening point polyamides or copolymerized polyamides, relatively low melting point or low softening point polyesters or copolymerized polyester resins, and the like.

[Cover material]
1. Inner lid on the container body side The inner lid on the container body side may be either a single layer, a multilayer film, or a sheet, but is a flexible resin material that can be deformed following changes in the container internal pressure. And forming a seal part such as an easily peelable seal part or a hardly peelable seal part on the seal part 9 with the flange 4 of the container body 1 and the seal part 10 with the outer lid 6 outside the container body, or an inner lid 5 is appropriately selected according to the purpose of providing a function such as a gas barrier property to 5.
As the inner lid, for example, low, medium, high density polyethylene, polypropylene (PP), isotactic polypropylene, propylene-ethylene copolymer, ethylene-vinyl acetate copolymer, ethylene series exemplified as the constituent material of the container body Olefin resins such as olefin resins graft-modified with unsaturated carboxylic acids or anhydrides thereof, polyamides or copolymerized polyamides having a relatively low melting point or a low softening point, polyesters or copolymerized polyesters having a relatively low melting point or a low softening point A resin that is highly flexible can be used.
Using these, the material is selected in consideration of the formation of an easily peelable seal portion with the flange portion 4 of the container body 1, a hardly peelable seal portion with the outer lid 6 on the outside of the container body, or an easily peelable seal portion. .

Moreover, the barrier property such as gas barrier properties such as oxygen barrier properties, water vapor barrier properties, flavor barrier properties, light barrier properties such as ultraviolet rays, etc. can be easily imparted to the inner lid on the container body side. In this case, as the barrier resin, for example, an ethylene-vinyl alcohol copolymer, a polyamide resin, a gas barrier polyester resin, a cyclic olefin copolymer, or the like can be used as the gas barrier resin.
Moreover, it is also possible to give oxygen absorption to gas barrier property, and as an oxygen absorptive resin, the transition metal catalyst, an oxidizing organic component, or the arbitrary thing which contains them in barrier property resin is mentioned.

Furthermore, when the inner lid is a multi-layer film, an optional resin layer can be provided as necessary, and when there is no adhesion between layers, an adhesive resin layer can be interposed between these layers. it can.
The adhesive resin is not particularly limited, but an acid-modified olefin resin such as maleic anhydride grafted polyethylene, ethylene / methacrylic acid copolymer (EMAA), maleic anhydride grafted polypropylene, urethane adhesive, or the like is used. Can do.

2. The outer lid on the outer side of the container body The outer lid on the outer side of the container body may be any one of a single layer, a multilayer film, and a sheet, similar to the inner lid on the container body side described above. In consideration of the formation of the hardly peelable seal portion or the easily peelable seal portion of the seal portion 10.
The outer lid is preferably made of a metal foil layer having a relatively high tensile breaking strength or an unstretched or stretched film such as polyethylene terephthalate or nylon 6 in order to impart drop resistance to the container. Moreover, the base material which printed the image, the character, etc. corresponding to the shape of a container main body by well-known methods, such as gravure printing, can be used for an outer cover.

[Hard peelable seal part / easy peelable seal part]
Generally, a hard-to-peel seal part is obtained by combining the same or the same kind of resin. For example, polyolefin resins such as polyethylene and polypropylene are excellent heat-sealable resins. However, if the same resins are combined and heat-sealed, a hardly peelable seal part can be easily formed.
The easily peelable seal portion can be obtained by applying a technique for cohesive failure, delamination, and interfacial peeling at the time of peeling. For example, an easily peelable seal portion can be easily formed by appropriately blending a virgin resin with a resin that inhibits heat sealability, combining this blend resin and the virgin resin, and heat-sealing.
Accordingly, the flange portion 4 of the container body 1 and the opposing surface of the inner lid 5 on the container body side, or the opposing surface of the inner lid 5 on the container body side and the outer lid 6 on the outer side of the container body, as necessary. A resin may be selected as appropriate so that a hardly peelable seal portion or an easily peelable seal portion is formed.

The evaluation methods employed in Examples 1 to 3 and Comparative Examples 1 to 3 are described below.
1. Container rigidity With the cup-shaped container lying sideways, the flange part was compressed at a speed of 500 mm / min using a universal testing machine (TENSILON manufactured by ORIENTEC), and the load when the flange diameter was distorted by 20% was 23 ° C. It was measured.

2. Deformation of container main body and lid After the contents (coffee) were filled and sealed, the container was left in an atmosphere of 5 ° C. chilled and 80 ° C. hot water bath for one day, and then leakage and container deformation were visually confirmed.

3. Drop strength After the container filled with the contents (coffee) and sealed is left in an atmosphere of 5 ° C and 80 ° C for 1 day, it is dropped from the height of 80cm at room temperature (23 ° C), and the flange part of the container body 1 The presence or absence of peeling at the easily peelable seal portion between 4 and the inner lid 5 was confirmed, and the sealing performance was evaluated.

4). Unsealing strength The knobs provided on the two lids of the inner lid and the outer lid were fixed to a push-pull gauge using a jig and pulled in the direction of 135 degrees with respect to the flange surface, and the opening strength was measured.

In Example 1, from the inner layer side, a multilayer sheet composed of PP (400 μm) / EVOH (50 μm) / PP (400 μm) was vacuum-compressed to produce a cup-shaped container having a circular cross-sectional shape with the following dimensions.
95mm height
Side wall part upper diameter 63mm
Bottom diameter 48mm
Flange outer diameter 75mm
Side wall average thickness 0.35mm
Average thickness of bottom 0.6mm
Average thickness of flange 0.7mm
Full capacity 220cc
Container rigidity 26N
After this cup-shaped container was hot filled with 180 cc of 85 ° C. black coffee, two lids made of the following materials were sequentially heat-sealed and sealed, and the evaluation was performed.
(1) Inner lid 5 (drop lid) on the container body side
(A) Material (from outer lid 6 side)
PP (35 μm) / EVOH (30 μm) / PP (35 μm)
(B) Average thickness 0.075mm
(C) Depth 8mm
(2) Outer lid 6 on the outside of the container body
(A) Material (from outer layer side)
Biaxially stretched nylon 6 (25 μm) / PP (50 μm)
(B) There is a vent hole with a diameter of 2 mm in the center. (3) Seal part (a) Seal part between the flange part of the container body and the inner lid 5 Hard peelable seal part Seal width: 5 mm
(B) Seal portion between the inner lid 5 and the outer lid 6 Hard peelable seal portion Seal width: 4 mm
(C) Positional relationship of seal part:
The inner edge of the seal portion between the flange portion 4 and the inner lid 5 of the container body 1 is the position of the seal portion between the inner lid 5 and the outer lid 6. It heat-sealed so that it might be located in the center part side of a 1.5 mm container from an inner side edge.

  The same container body 1 and outer lid 6 as in Example 1 were used, and PP (35 μm) / EVOH (30 μm) / PP (35 μm) / PP + PE blend (5 μm) from the outer lid 6 side to the inner lid 5 on the container body side. ) To make the seal part between the flange part 4 and the inner lid 5 of the container main body 1 an easily peelable seal part, and sterilize the container main body 1, the inner lid 5, the outer lid 6 and black coffee in advance at room temperature (25 The sealed container was prepared in the same manner as in Example 1 except that aseptic filling was performed while replacing with nitrogen at 0 ° C.), and the evaluation was performed. In addition, a knob for opening was provided on both the inner lid 5 and the outer lid 6.

A polyethylene terephthalate resin (PET) is injection molded to create a preform, heated to 95 ° C. above Tg, and then stretched with a plug having the same dimensions as the final molded body, and then compressed air And heat-fixed with a female mold slightly larger than the plug heated to 180 ° C., and then contracted by decompression, shaped with a plug and cooled, and the cross-sectional shape of the following dimensions is circular A cup-shaped container was produced.
108mm height
Side wall upper diameter 62mm
Bottom diameter 48mm
Flange outer diameter 75mm
Side wall average thickness 0.4mm
Average thickness of bottom 0.3mm
Average thickness of flange 2.0mm
Full capacity 245cc
Container rigidity 120N
As in Example 2, this cup-shaped container was aseptically filled with 200 cc of contents, and two lids made of the following materials were sequentially heat-sealed and sealed in the same manner as in Example 1, and the evaluation was performed.
In addition, the seal part between the flange part of the container body and the inner lid 5 and the seal part between the inner lid 5 and the outer lid 6 are easy peelable seal parts, respectively, and both the inner lid 5 and the outer lid 6 are picked for opening. Set up a section.
(1) Inner lid 5 on the container body side
(A) Material (from outer lid 6 side)
PP (35 μm) / EVOH (30 μm) / High density polyethylene (HDPE) (35 μm) / EMAA (10 μm) / PBT + PP blend (10 μm)
(B) Average thickness 0.084mm
(C) Depth 10mm
(2) Outer lid 6 outside the container body (from the outer layer side)
Biaxially stretched polyethylene terephthalate (12 μm) / biaxially stretched nylon 6 (15 μm) / PP (45 μm) / PP + PE blend (5 μm)

[Comparative Example 1]
The contents were filled and sealed in the same manner as in Example 1 except that the inner lid 5 was not used as the lid member and only the outer lid 6 with no vent hole was used.

[Comparative Example 2]
Except that the outer lid 6 was not used and only the inner lid 5 was used, the contents were filled and sealed in the same manner as in Example 1 for evaluation.

[Comparative Example 3]
The contents were filled and sealed in the same manner as in Example 3 except that only the inner lid 5 was used without using the outer lid 6, and the evaluation was performed.

Table 1 shows the evaluation results of the containers in the examples and comparative examples.
In Examples 1 to 3, any deformation of the container body 1, the inner lid 5 and the outer lid 6 was not observed in appearance even in a chilled and hot water environment at 5 ° C. and 80 ° C., and the drop resistance was also good.
Moreover, in the container of Example 2 and Example 3, the unsealing strength required to peel off the inner lid 5 and the outer lid 6 from the easy peel seal part between the flange part 4 and the inner lid 5 of the container body 1 is respectively It was 18N and 16N, and showed a value of 20N or less that can be easily opened by hand.
In addition, in the container of Example 1, since the seal part between the flange part 4 and the inner cover 5 of the container main body 1 and between the inner cover 5 and the outer cover 6 was a non-peeling seal part, evaluation of the opening strength Does not go.
Furthermore, in Example 3, the unsealing strength between the inner lid 5 and the outer lid 6 was 19N, and it could be easily opened by hand.

  The container of the present invention is excellent in preventing deformation damage and poor sealing due to drop impact, sterilization, temperature change during distribution, etc., and can easily open the lid, so it is filled with food, beverages, etc. Can be widely used in sealing container field.

Sectional view of the container of the present invention Sectional drawing which shows the case where internal pressure is loaded to the container of this invention Partial expanded sectional view which shows the case where internal pressure is loaded to the container of this invention Reference diagram showing a deformation state due to a change in internal pressure of another container of the present invention Reference diagram showing the opened state of the container of the present invention Sectional view of a container containing other contents in the space Reference diagram showing an example of opening the container of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Container body 2 Side wall part 3 Bottom part 4 Flange part 5 Inner cover 6 Outer cover 7 Space part 8 Ventilation part 9 Seal part 10 Seal part 11 Inner edge (seal part 9)
12 Inner edge (seal part 10)
13 Outer edge (seal part 9)
14 Outer edge (seal part 10)
15 Picking piece 16 Easy tear

Claims (6)

  A container comprising a container body, an inner lid, and an outer lid, wherein the inner lid located on the container body side is a flexible drop lid that can be deformed following changes in internal pressure inside the container, and the flange of the container body A container characterized in that the peripheral end of the outer lid on the outer lid on the outer lid and the inner lid is sealed.   The container according to claim 1, wherein the space formed by the inner lid and the outer lid communicates with outside air.   The container according to claim 1, wherein the flange portion and the seal portion of the inner lid are easily peelable seal portions.   The seal part of the inner lid and the outer lid is a hard-to-peel seal part, and is formed at a position partially overlapping with the flange part and the easy-peel seal part of the inner lid, and the inner edge of the easy-peel seal part is hard to peel The container according to claim 3, wherein the container is located closer to the center than the inner edge of the adhesive seal portion.   The container according to any one of claims 1 to 3, wherein the seal portion between the inner lid and the outer lid is an easily peelable seal portion.   The container according to any one of claims 1 to 5, wherein the inner lid has a barrier property.

Images