JP3157394U - Closed packaging container lid and sealed packaging container - Google Patents

Abstract

The present invention provides a lid for a hermetic packaging container and a hermetic packaging container, which are suitable for food hygiene because a sealing piece is not mixed in the container even if a deaeration hole of the lid is exposed. A deaeration hole (51) is formed in a lid (50), and a sealing piece (60) for closing the deaeration hole is adhered and provided on the deaeration hole. A low-temperature melting part (71) and a non-low-temperature melting part (72) are formed at the bonding portion between the sealing piece and the lid, the sealing piece is attached to the lid, and the deaeration holes are closed. Only the melted part melts and a part of the sealing piece curls up and rises, leaving the non-low temperature melting part as a drop-off prevention part, and the sealing piece partly peels from the lid to expose the deaeration hole. [Selection] Figure 3

Description

The present invention relates to a lid of a hermetic packaging container and a hermetic packaging container.

As a sealed package (sealed packaging container) for beverages and foods, the container body is filled with a beverage and the flange formed on the periphery of the opening of the container body and the film-shaped lid are heat sealed. There has been proposed a packaging container in which an opening is hermetically packaged and a lid is peeled off from a container main body to be opened when taking out a stored beverage or the like.

This type of hermetic package is required to have a high hermeticity from the viewpoint of preserving beverages to be stored. On the other hand, from the viewpoint of taking out the contents, the lid easily peels off from the flange portion of the container body. Openability is required, and at least it is necessary to satisfy the contradictory properties of high sealability and easy opening at the same time.

By the way, with the spread of microwave ovens in recent years, it has been widely practiced that a package containing a beverage that can be heated and eaten is rapidly heated in a microwave oven to easily cook the contents.

If a package such as coffee, tea, cocoa, or liquid food such as soups, miso soup, juice, liquor and so on is sealed and placed in a microwave oven, it will be heated and steam will be generated by the steam generated from the beverage. There is a risk that the internal pressure will rise and the package (especially the lid) will rupture, causing the contents to scatter and contaminate the microwave oven. For this reason, normally, a microwave oven user opens a small hole in the lid body with a fork or the like before heating, or peels off a part of the lid body from the container body to provide an air vent portion.

Japanese Patent No. 2571569

As mentioned above, it is necessary to vent the air so that the package sealed with the beverage does not rupture when heated by the microwave oven. However, when eating the beverage etc. in the sealed package, (1) an air vent is provided each time. This is cumbersome for users and lacks in convenience. (2) In addition, it is hygienic and storable to provide air vents in the lid of the package in advance during the production of the package filled with beverages. (3) Furthermore, even if an air vent hole is provided in the lid body, and the air vent hole is covered with the covering body, the covering body is separated from the lid body by heating the microwave oven to form a separate body, and the inside of the container body There is a problem that it may be mixed in the food and is not preferable for food hygiene.

Accordingly, an object of the present invention is to provide a lid of a hermetic packaging container and a hermetic packaging container that are suitable as a packaging body that can be filled with food and directly heated in a microwave oven.

Another object of the present invention is to provide a lid for a hermetic packaging container and a hermetic packaging container that are suitable for food hygiene without sealing pieces being mixed into the container even if the deaeration holes of the lid are exposed. It is in.

The lid of the hermetic packaging container according to the present invention is a lid of a hermetic packaging container that is sealed at a flange formed at the periphery of the opening of the container main body and hermetically seals the container main body, and has a deaeration hole formed in the lid A sealing piece for closing the deaeration hole is provided on the deaeration hole, and a low-temperature melting part and a non-low-temperature melting part are formed at an adhesive portion between the sealing piece and the lid, and the sealing is performed. A stopper is attached to the lid to close the deaeration hole. During heating, only the low-temperature melting portion melts, and a part of the sealing piece curls and rises, and the non-low-temperature melting portion is prevented from falling off. The sealing piece is partly peeled off from the lid body and the deaeration hole is exposed.

A hermetic packaging container according to the present invention includes a container main body and a lid, and the container main body includes an opening, a flange portion is formed on a peripheral edge of the opening, and a heat insulating layer is formed on the outer periphery of the container main body. A sealed packaging container in which the lid body is sealed at the flange and the container body is hermetically sealed, wherein a deaeration hole is formed in the lid body, and the deaeration hole is closed on the deaeration hole. A stopper piece is provided by bonding, a low-temperature melting portion and a non-low-temperature melting portion are formed at an adhesive portion between the sealing piece and the lid body, and the sealing piece is attached to the lid body to form the deaeration hole When heating, only the low-temperature melting part melts and a part of the sealing piece curls up and rises, leaving the non-low-temperature melting part as a drop-off prevention part, and the sealing part is partly from the lid It peels and the said deaeration hole is exposed, It is characterized by the above-mentioned.

The lid is preferably provided with a sealant layer that heat-seals the flange formed on the container body.

Further, the lid body has a seal layer having heat sealing properties and easy peel properties with respect to a flange portion formed at the periphery of the opening portion of the container body, and has a gas barrier property in contact with the seal layer and equivalent to that of the container body. A gas barrier layer and a base layer that is in contact with the gas barrier layer and maintains a shape as a lid may be provided.

An adhesive layer may be formed between the sealing layer, gas barrier layer, and substrate layer as necessary to maintain interlayer adhesion.

The lid of the hermetic packaging container according to the present invention is formed using a single layer or multilayer film or sheet (hereinafter referred to as “film or the like”). The film or the like may be, for example, a single layer or laminated film using one or two or more materials of polypropylene, polyethylene, polyamide (nylon), and polyester resins. Further, the film or the like may be composed of the resin material mixed or an elastomer of the resin material.

In addition, the lid is preferably formed with a gas barrier layer in order to ensure and improve the storage stability of the contents, and the gas barrier property of the lid should be comparable to the gas barrier property of the container body. preferable. The gas barrier layer of the lid is formed of, for example, a resin material such as ethylene-vinyl alcohol copolymer, polyamide (nylon), polyethylene terephthalate (PET), an aluminum foil, an aluminum vapor deposition layer, or the like.

The thickness of the film constituting the lid may be 50 to 500 μm, and preferably 80 to 400 μm.

The shape of the lid may be either a flat shape or a molded product (drop lid).

As the material of the sealing piece, a film having heat shrinkability is used. When the packaging container is heated by the heating of the microwave and the internal pressure and temperature of the container body rise, the sealing piece contracts, partially peels, and opens the deaeration hole. In order to satisfy this function, the sealing piece is a single layer of resin such as polypropylene (PP), polyethylene (PE), polystyrene (PS), polyamide (nylon), polyethylene terephthalate (PET), polyvinyl chloride (PVC), or the like. A multilayer film coextruded by combining these resins may be stretched, or a shrinkable film obtained by stretching a single layer film may be laminated and laminated in a subsequent step. The thickness of the heat-shrinkable film forming the sealing piece is suitably 20 to 100 μm, but in order to secure the gas barrier property of the sealing piece, a barrier material is laminated by a laminating method, or a corresponding resin is used. Coextrusion stretching may be performed.

The sealing piece can be formed of either a heat-shrinkable film that is highly stretched in the longitudinal uniaxial direction and highly contracted in one direction, or a heat-shrinkable film that shrinks in both the longitudinal and transverse axial directions.

Adhesion between the sealing piece and the lid is as follows: (1) When adhering using a heat-sensitive label or adhesive label, make sure that the adhesive is present only at the adhesive portion of the sealing piece with the lid, (2) heat seal at low temperature and bond (heat seal type), (3) pressure sensitive adhesive for bonding the sealing piece to the lid side, low temperature Coat and bond the adhesive. That is, the deaeration hole is closed by the sealing piece, and the sealing piece may be adhered (adhered) to the lid body by heat sealing, or an ethylene-vinyl acetate copolymer (EVA) based adhesive or urethane based coating. You may make it adhere | attach on a cover body using adhesives, such as an adhesive agent, a rubber-type adhesive agent, and an acrylic adhesive agent.

The sealing piece functions as a valve that keeps the deaeration hole open when the sealed packaging container is heated in a microwave oven, the temperature in the container rises, and the internal pressure in the container rises as water vapor is generated. At that time, in a normal state, the sealing piece that closes the deaeration hole contracts due to heat, and a part of the sealing piece peels off from the top surface of the lid. The sealing piece may have a gas barrier property equivalent to that of the container body in order to ensure the preservability of the contents filled and sealed in the container as necessary. Further, the sealing piece may be formed in multiple layers so as to provide gas barrier properties and aroma retention properties equivalent to those of the container main body and the lid body in order to preserve the contents to be filled in the container.

It is also possible to decorate by directly printing on the lid and the sealing piece or laminating a gravure printed film.

The shape of the deaeration hole is not limited as long as the internal pressure of the hermetic packaging container can be smoothly released through the deaeration hole during heating. For example, a small circular hole can be formed in a plan view. Moreover, it is preferable to provide the formation position of a deaeration hole in the center part of a cover body, and you may provide multiple.

The present invention has the following effects.
(1) A hermetic packaging container that can be directly heated in a microwave oven after being filled and sealed with food, food, etc., and has a function of releasing the internal pressure in the container that rises due to water vapor generated during heating. A lid and a sealed packaging container are obtained.
(2) Even if the deaeration hole of the lid is exposed, the sealing piece covering the deaeration hole is not mixed in the container, and the lid of the hermetic packaging container and the hermetic packaging container are suitable for food hygiene. It is to provide.

It is a perspective view of the airtight packaging container which concerns on this invention. It is a perspective view which shows the state which isolate | separated the component of the airtight packaging container which concerns on this invention. It is a perspective view which shows that the sealing piece which comprises the cover body of the airtight packaging container which concerns on this invention peels from the cover body, and the deaeration hole is exposed. A perspective view showing that a part of the lid of the hermetic packaging container according to the present invention is peeled to form an opening, and that the sealing piece constituting the lid is peeled off from the lid to expose the deaeration holes FIG. It is a cross-sectional enlarged schematic diagram which shows the structure of the sealing piece which comprises the cover body of the airtight packaging container which concerns on this invention. It is a figure which shows by blowing that the container main body is formed in multiple layers, while notching and showing the right half part of the container main body which comprises the airtight packaging container which concerns on this invention. It is a top view of the lid of the airtight packaging container concerning the present invention.

The following is a description of an embodiment of the present invention.
The hermetic packaging container 10 according to the present invention includes a container main body 11 and a lid body 50. The container main body 11 includes an opening 12, and a flange 13 is formed on the periphery of the opening. The lid 50 is sealed to the flange portion 13 and the container body 11 is sealed.

The container body 11 is formed as a multi-layer cup in which a plurality of resins are laminated, and is formed of a resin material imparted with a gas barrier property. Furthermore, the heat insulation layer 15 which interrupts the heat | fever of the content in a container with heat insulating materials, such as a corrugated label and a PSP label, is formed in the outermost layer (refer FIG. 6).

A deaeration hole 51 opened in the center is formed in the lid 50, and a sealing piece 60 formed by a heat-sensitive label is attached to the deaeration hole by closing the deaeration hole. Then, a low-temperature melting portion 71 and a non-low-temperature melting portion 72 are formed at an adhesive portion between the sealing piece 60 and the lid 50, and the sealing piece 60 is attached to the lid 50 to form the deaeration hole 51 is closed.

When the hermetic packaging container 10 is heated, only the low-temperature melting portion 71 is melted, the internal pressure in the container rises, the adhesion between the sealing piece 60 and the lid 50 is gradually released, and the deaeration hole 51 is formed. It is exposed and the internal pressure of the sealed packaging container is released (FIG. 3). Thus, the sealing piece 60 functions as an open valve.

The deaeration hole 51 formed in the lid 50 is normally closed (in a state where the deaeration hole 51 is not heated by a microwave oven) by the sealing piece 60 to prevent entry of dust and dust from the outside, and the package Placed in a sealed state. When this hermetic packaging container (packaging body) 10 is heated in a microwave oven, the temperature and internal pressure in the container body rise, only the low-temperature melting portion 71 melts, and a part of the sealing piece curls and rises up. The sealing piece 60 is partially peeled from the lid 50 leaving the low-temperature melting portion 72 as a drop-off preventing portion, the deaeration hole 51 is exposed, and the internal pressure is released.

Thus, the hermetic packaging container 10 has a function of releasing the internal pressure in the container that rises due to water vapor generated at the time of heating even if it can be directly heated in a microwave oven after being filled and sealed with food / food. ing.

The formation of the low-temperature melting portion 71 that melts at about 60 ° C. in the portion surrounding the deaeration hole 51 of the sealing piece 60 and the non-low-temperature melting portion (drop-off prevention portion) 72 that does not melt at about 60 ° C. The sealing piece 60 and the lid 50 can be formed by providing strength and weakness in the adhesive strength at the site where the sealing piece 60 and the lid 50 are attached. That is, a portion that peels off when heated by a microwave oven and a drop-off prevention portion 72 that remains without peeling are formed in a portion surrounding the deaeration hole in the sealing piece (see FIG. 7). Thus, even if the hermetic packaging container 10 is heated in a microwave oven to expose the deaeration holes 51 of the lid 50, the sealing piece 60 does not come off from the lid 50 (see FIGS. 3 and 4), and the sealing The stop piece 60 is not mixed into the container body. For this reason, it is safe in terms of food hygiene.

The lid 50 includes a seal layer 53 having good heat sealability and easy peelability with respect to the flange portion 13 formed at the periphery of the opening 12 of the container body 11, and the container in contact with the seal layer. A gas barrier layer 55 having a gas barrier property equivalent to that of the main body 11, and a base layer 57 that is in contact with the gas barrier layer and maintains the shape at the time of molding as a lid and maintains the waist, hardness, and stackability. ing. Further, adhesive layers 54 and 56 are formed between the seal layer 53, the gas barrier layer 55, and the base layer 57 to maintain the interlayer adhesive force (see FIG. 5).

DESCRIPTION OF SYMBOLS 10 Sealed packaging container 11 Container main body 12 Opening part 13 Flange part 50 Cover body 51 Deaeration hole 53 Seal layer 54 Adhesive layer 55 Gas barrier layer 56 Adhesive layer 57 Base layer 60 Sealing piece 71 Low temperature melting part 72 Non-low temperature melting part

Claims (4)

A lid of a sealed packaging container that is sealed at a flange formed at the periphery of the opening of the container body and seals the container body,
A deaeration hole is formed in the lid, and a sealing piece for closing the deaeration hole is provided on the deaeration hole, and a low-temperature melting portion and a non-low-temperature melting are provided at an adhesive portion between the sealing piece and the lid. Forming a portion, and attaching the sealing piece to the lid to close the deaeration hole,
At the time of heating, only the low-temperature melting portion is melted, and a part of the sealing piece curls up and rises, leaving the non-low-temperature melting portion as a drop-off prevention portion, and the sealing piece is partly peeled off from the lid. A lid for a hermetic packaging container, wherein the deaeration holes are exposed.   The lid body has a heat sealing property and an easy peel property with respect to the flange portion formed at the periphery of the opening of the container body, and has a gas barrier property equivalent to the container body in contact with the sealing layer. The lid of a hermetic packaging container according to claim 1, further comprising: a gas barrier layer having a base layer that is in contact with the gas barrier layer and maintains a shape as a lid. The container body includes a container body, the container body includes an opening, a flange is formed on a periphery of the opening, and a heat insulating layer is formed on the outer periphery of the container body. A sealed packaging container in which a body is sealed and the container body is sealed;
A deaeration hole is formed in the lid, and a sealing piece for closing the deaeration hole is provided on the deaeration hole, and a low-temperature melting portion and a non-low-temperature melting are provided at an adhesive portion between the sealing piece and the lid. Forming a portion, and attaching the sealing piece to the lid to close the deaeration hole,
At the time of heating, only the low-temperature melting portion is melted, and a part of the sealing piece curls up and rises, leaving the non-low-temperature melting portion as a drop-off prevention portion, and the sealing piece is partly peeled off from the lid. A hermetically sealed container characterized by exposing deaeration holes.   The lid body has a heat sealing property and an easy peel property with respect to the flange portion formed at the periphery of the opening of the container body, and has a gas barrier property equivalent to the container body in contact with the sealing layer. The hermetic packaging container according to claim 3, further comprising: a gas barrier layer having a base layer that is in contact with the gas barrier layer and maintains a shape as a lid.

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