JP2005112467A - Container for liquor drink capable of being heated by microwave oven - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container for liquor drink which can be heated safely with a lid unopened by a microwave oven. <P>SOLUTION: The container for liquor drink comprises a cup with an opening and a lid for closing the opening. The lid is bonded on the periphery of the opening of the cup to seal the container. The lid bonded as described above can be opened with a bursting sound due to an increased inner pressure when the liquor drink is heated to a temperature above an appropriate temperature by a microwave oven. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an alcoholic beverage container that can be safely heated in a microwave oven without opening the lid.

  Alcoholic beverages such as sake have a custom of warming and drinking. Generally, a warming machine is used as a device for safely heating a beverage filled in a container. When such a warmer is used, there has been a problem that it takes a long time after the container containing the beverage is set to the set temperature. For this reason, when selling at a shop front etc., in order to respond to the customer's desire to purchase a hot beverage immediately, for example, a method of warming a container containing a beverage in advance is used. However, if the beverage is kept warm for a long time, there is a problem that the beverage deteriorates and its original taste is impaired.

  On the other hand, a microwave oven is also used as a device for heating a beverage filled in a container. If a microwave oven is used for heating, the beverage can be warmed in a short time and can be easily provided without impairing the original taste of the beverage.

  However, when a beverage in a container is heated by a microwave oven, it may be overheated by an erroneous operation. In this case, there are accidents in which the container ruptures due to an increase in internal pressure and high-temperature beverages scatter, and accidents in which heated beverages under elevated internal pressure cause bumping due to decompression due to opening and high-temperature beverages spout out. In order to prevent this from happening, when heating in a microwave oven, the container must usually be opened beforehand.

  Furthermore, there is a great demand from customers who want to take hot drinks received at stores and take them outside. In the case of excursions such as cherry-blossom viewing or sports watching outdoors, it is often the case that purchased beverages are carried around for a while. In this case, if the container containing the beverage is left unopened, there is no need to worry about the beverage spilling, which is very convenient. Moreover, if it is not opened until just before drinking, it is also hygienic and gives the customer a sense of security.

  Therefore, there has been a demand for a beverage container that can be heated in a microwave oven without opening the lid and that does not cause inconvenient rupture.

  In order to meet this demand, it is conceivable to use a beverage container that can avoid an inconvenient rupture by releasing the internal pressure when heated too much in a microwave oven without opening the lid.

  Patent document 1 can be mentioned as a well-known technique based on such an idea. This discloses a beverage container in which a cap having needle-like protrusions is further placed on the lid of the container. When the container disclosed here is heated too much in a microwave oven, the lid is lifted and contacts the needle-like protrusions, and is thereby pierced to form a conduction path, leading the internal pressure to the outside. It is a mechanism.

  Moreover, Patent Document 2, Patent Document 3, and Patent Document 4 can be cited as similar known techniques. These disclose containers in which a weakly sealed portion that is weak against internal pressure is provided in a part of the container or lid. In the container which these disclose, in the state which heated too much with the microwave oven, the above-mentioned weakly-sealed part forms the conduction | electrical_connection path with the exterior, and is a structure which guides an internal pressure outside.

JP 2000-168850 A WO99 / 61346 JP 2003-182756 A Japanese Patent Laid-Open No. 2003-200979

  In the method of piercing a part of the lid with the needle-like protrusion, which is the disclosed technique of Patent Document 1, the temperature and pressure to be pierced greatly differ depending on slight changes in the distance between the lid and the needle-like protrusion, the shape of the needle-like protrusion, For this reason, there are drawbacks such as requiring a large cost to ensure the working accuracy for use as a realistic safety device that operates at the target temperature and pressure.

  Furthermore, it is dangerous to provide sharp needle-like protrusions on beverage containers handled by general consumers.

  In addition, in a method in which a small part of a lid or the like as disclosed in Patent Documents 1 to 4 forms a conduction path with the outside, the internal pressure is concentrated on that part, and a beverage that has been heated too much is guided. There are drawbacks such as jetting through the passage.

  Further, in addition to the above-mentioned drawbacks, in a method in which a conduction path to the outside is formed in a very small part, the container is opened when it is taken out from the outside in a state where it enters the microwave oven. There is a drawback that it is difficult to determine at first glance whether or not it is.

  However, if you try to take it out without noticing that it is in a conductive path, you will not be able to pay such attention and depending on the temperature of the beverage, it may be dangerous to your hands and will stain your clothes. Or, conversely, an unexpected thing may enter the container and it may be unsanitary.

  Moreover, in the prior art, it aims at providing the container about drink in general, and the proposal which provides the container especially suitable for liquor drink by using the characteristic of liquor drink is not seen.

  This invention is made | formed in view of the said various subject, The objective of this invention is providing the container for alcoholic beverages which can be heated safely with a microwave oven, without opening a cover.

To achieve the above objective,
The container for alcoholic beverages according to claim 1 is:
It has a basic configuration consisting of a cup having an opening and a lid that closes the opening,
The lid is adhered to the periphery of the cup opening to seal the container, and the lid adheres to a popping sound due to an increase in internal pressure after the temperature of the alcoholic beverage exceeds an appropriate temperature by heating with a microwave oven. It is the state opened.

  By this, when heating in a microwave oven without opening the container containing alcoholic beverages, if heating is made up to the appropriate temperature of the alcoholic beverage, heating is done without opening, and if it exceeds the appropriate temperature By being opened by the internal pressure, it is possible to avoid inconvenient rupture and to make the user aware of overheating.

  Examples of the alcoholic beverage include sake, synthetic sake, shochu, old sake, or a diluted product thereof.

The container for liquor according to claim 2 is:
The adhesive state is characterized in that when a liquor beverage having an alcohol concentration of 10 to 18% by mass reaches a temperature of 75 to 85 ° C., a popping sound is generated and the beverage is opened.

  For example, sake, synthetic sake, and the like are included in the alcoholic beverage having this alcohol concentration.

  By selecting this temperature range, it is possible to open the bottle at a temperature that does not pose a risk of severe burns even if it is over the appropriate temperature for alcoholic beverages such as sake. .

  This is based on the knowledge that an aqueous solution having an ethanol concentration of around 15% by mass has a boiling point around 85 ° C.

The container for liquor according to claim 3 is:
The internal pressure is higher by atmospheric pressure than atmospheric pressure in the range of 40 to 79 kPa, preferably in the range of 45 to 76 kPa, particularly preferably in the range of 50 to 69 kPa, and even more preferably in the range of 51 to 69 kPa. It is the adhesive state which is opened when it arrives.

  By selecting this pressure region, opening in a temperature region suitable for the present invention becomes possible.

The container for liquor according to claim 4,
The adhesion state is characterized in that a plosive sound is generated, and preferably an area of one third or more of the lid is opened, particularly preferably an area of half or more of the lid is opened.

  This makes it possible to minimize the danger of the beverage being overheated.

The container for an alcoholic beverage according to claim 5 is:
The lid has a multilayer structure including an outer surface layer and an adhesive layer bonded to the cup opening, the surface layer is made of a material having flexibility, and the adhesive layer is made of a material having thermocompression bonding property. It is characterized by becoming.

  By adopting this configuration, it is possible to advantageously obtain an alcoholic beverage container capable of producing the above-described effects of the present invention while ensuring excellent usability of the lid portion.

The container for liquor according to claim 6,
The surface of the peripheral edge of the cup opening to which the lid is bonded is formed as an annular smooth surface having a predetermined width.

  By adopting a structure having a smooth surface, it is possible to easily generate uniform adhesion, and thereby it is possible to generate a plosive sound more clearly and reliably.

The container for liquor according to claim 7,
It has a basic configuration consisting of a cup having an opening and a lid that closes the opening,
The lid has a multi-layer structure including a surface layer and an adhesive layer, the surface layer is made of a flexible material, the adhesive layer is made of a material having thermocompression bonding, and the lid has a peripheral edge of the cup opening. The adhesive strength is 3 to 17 N / 15 mm (more preferably 5 to 15 N / 15 mm, particularly preferably 6 to 12 N / 15 mm).

  This configuration is provided with suitable configuration requirements in the present invention, and thereby the above-described operation can be obtained with certainty.

The alcoholic beverage container according to claim 8,
Adhesion by thermocompression bonding is higher in the range of 40 to 79 kPa, preferably in the range of 45 to 76 kPa, particularly preferably in the range of 50 to 69 kPa, more particularly preferably in the range of 51 to 69 kPa. It is an adhesive state that is opened when pressure is reached.

  This configuration is provided with suitable configuration requirements in the present invention, and thereby the above-described operation can be obtained with certainty.

The alcoholic beverage container according to claim 9 is:
The surface layer contains unstretched nylon.

  A resin film can be used for the surface layer depending on the application, but by adopting a configuration including unstretched nylon, an appropriate flexibility and strength can be imparted, and an internal pressure that results in adhesion failure As a result, the plosive sound is more clearly generated and a wider area of the lid can be opened.

  The container for an alcoholic beverage according to claim 10, wherein the cup opening periphery is preferably made of a material containing PET (polyethylene terephthalate), particularly preferably A-PET (amorphous polyethylene terephthalate), and the adhesive layer is made of PET. It is characterized by including.

  By adopting this configuration, it becomes easy to make the surface of the periphery of the cup opening a smooth surface, thereby making it easy to produce uniform adhesion, and appropriately imparting flexibility to the container. As a result, the internal pressure that causes the fracture of the adhesive can be uniformly transmitted to the bonded portion, so that a plosive sound can be generated more clearly and a wider area of the lid can be opened.

  The container for alcoholic beverages of the present invention can be heated in a microwave oven in a normal use state without filling the alcoholic beverage and opening the lid.

  For this reason, in a normal use state, it is possible to obtain an alcoholic beverage that maintains its flavor by heating for a short time. Moreover, since it is unopened, it is convenient to carry and is hygienic, so that it is possible to obtain a bottled alcoholic beverage that can be reassured by the consumer.

  And when the container for alcoholic beverages of this invention heats too much by the misoperation of a microwave oven, it can avoid an inconvenient burst etc. by releasing an internal pressure. And according to the preferable embodiment of this invention, even when it heats too much, the unexpected spout of alcoholic beverages does not occur. These can ensure the safety of the microwave operator.

  Furthermore, the liquor beverage container of the present invention emits a popping sound when it is opened due to overheating. According to the present invention, by adopting a configuration in which the lid is peeled off at a time, it is possible to generate a popping sound that can be clearly heard from outside the microwave oven as a warning sound with sufficient volume and reproducibility.

  Since such a bursting sound was conventionally avoided as a phenomenon associated with the bursting, even in a method of forming a conduction path in part, smooth and silent degassing is ideal, It was thought that not being an advantage. However, if it is a controlled plosive sound, the plosive sound itself is not dangerous, and is a suitable sound as a warning sound that makes the microwave operator aware of erroneous operations.

  Moreover, when the container for alcoholic beverages of this invention will be in an open state because it heated too much by misoperation, it can be easily visually recognized from the inside of a microwave oven by the external appearance which the lid | cover opened.

  Due to these warning sounds and appearance, the alcoholic beverage container of the present invention has an opportunity to let the operator recognize when it has been overheated due to an erroneous operation and to stop further erroneous operations. It is safe because it can be given and paid attention at the time of removal. And while keeping away the operator of a microwave oven from danger, such as a burn, it protects from the stain | pollution | contamination of clothes etc. by accidentally spilling alcoholic beverages, and can ensure a sanitary state by preventing mixing of an unexpected foreign material.

  Further, by selecting the temperature range peculiar to alcoholic beverages, that is, the temperature range of 75 to 85 ° C. as the temperature range for opening the lid, in a preferred embodiment of the container for alcoholic beverages of the present invention, sake or the like It is safe because it can be opened at a temperature that does not pose a risk of severe burns, etc.

  Since the container for alcoholic beverages of this invention does not use a needle-like protrusion etc. for the structure, it is safe for general consumers. Moreover, since it does not have such a complicated structure, it can be manufactured simply and inexpensively.

  The container for alcoholic beverages of this invention has as a basic structure the cup which has an opening part, and the lid which closes the opening part.

  FIG. 1, FIG. 2, FIG. 3 and FIG. 4 show an example of the best mode of the container for alcoholic beverages of the present invention. These drawings are explanatory diagrams, and the present invention is not limited to these explanatory diagrams.

  FIG. 1 is an explanatory view showing a state in which a container for alcoholic beverages of the present invention is sealed with a lid. The opening of the cup 5 is sealed with the lid 1. Sake is filled in the container up to the position indicated by the dotted line.

  The lid for the alcoholic beverage of FIG. 1 has its lid adhered to the periphery of the cup opening and sealed, and the lid is adhered after the temperature of the alcoholic beverage exceeds the appropriate temperature by heating with a microwave oven. A plosive sound is generated when the internal pressure rises, and the bag is opened.

  FIG. 2 is an explanatory view showing a state in which about half of the lid of the alcoholic beverage container of FIG. 1 is heated excessively by a microwave oven and automatically opened by internal pressure. The lid 1 having flexibility is shown in a state where the lid 1 is peeled off about half from the surface 6 a at the periphery of the cup opening in the cup 5.

  FIG. 3 is an explanatory diagram in which the vicinity of the cup opening in FIG. 1 (A-A cross section) is partially enlarged. The lid 1 has a multilayer structure of a surface layer 2 and an adhesive layer 3. The peripheral edge 6 of the opening of the cup 5 has an annular shape protruding outward from the cup body so as to be advantageous for adhesion to the lid.

  FIG. 4 is an explanatory view in which the vicinity of the cup opening (cross section AA) in FIG. 2 is partially enlarged. FIG. 4 corresponds to a state in which the lid 1 is peeled from the peripheral edge 6 of the opening of the cup 5 in FIG. The surface 6a at the periphery of the cup opening bonded to the adhesive layer 3 of the lid 1 is a smooth surface. In FIG. 4, the adhesive layer of the lid is peeled off according to the surface layer, and the peeling occurs at the boundary between the surface 6 a at the periphery of the cup opening and the adhesive layer 3, and shows the state of interface peeling. However, this is only an example of a peeled state.

  The overall shape of the lid used in the liquor beverage container of the present invention can be changed according to the shape of the periphery of the cup opening. In particular, it can be formed into a disc shape so that it can be easily adhered and sealed to the periphery of the annular cup opening, which is a preferable shape from the viewpoint of uniform transmission of internal pressure.

  The lid material is preferably a flexible material that can transmit pressure uniformly in a sealed state, and preferably includes a material that softens when heated. As such a material, a material containing a resin can be used. In particular, it is preferable to include a resin film having a multilayer structure from the viewpoint of imparting various properties.

  The lid has a multilayer structure including an outer surface layer and an adhesive layer bonded to the cup opening, the surface layer is made of a material having flexibility, and the adhesive layer is made of a material having thermocompression bonding property. It is suitable in the implementation.

  Resin film can be used for the surface layer of the lid, for example, polyethylene, polypropylene, polystyrene, polyethylene terephthalate, polyvinylidene chloride, polyvinyl chloride, vinylon, nylon, etc. From the viewpoints of flexibility and internal pressure transmission, unstretched nylon is preferred.

  The adhesive layer for the lid includes an adhesive material for bonding the lid and the periphery of the cup opening. As this adhesive material, an adhesive and a material having a thermocompression bonding property (heat sealability) can be used, and the optimum adhesive material depends on the material of the periphery of the cup opening, for example, polyethylene, polypropylene, Polyethylene terephthalate, ethylene vinyl acetate copolymer and the like can be used.

  In addition, it is preferable to use a so-called easy-open (easy peel open) material for the adhesive layer of the lid from the viewpoint of adjusting the adhesive strength. When A-PET (amorphous polyethylene terephthalate) is used at the periphery of the cup opening, it can be suitably carried out by including PET (polyethylene terephthalate) as the adhesive layer.

  The alcoholic beverage container of the present invention having the same adhesive state is manufactured by including the adhesive material contained in the adhesive layer described with respect to the lid in the peripheral surface layer of the cup opening, not the adhesive layer of the lid. Can do. Moreover, it can also be made to include on both the lid side and the cup side by an adhesive material.

  Furthermore, the lid has a surface layer and an adhesive layer, but it can also have a single layer structure that also serves as this.

  The lid can also have an intermediate layer between the surface layer and the adhesive layer, and can also have a multilayer structure including a plurality of layers. Although this intermediate layer can be used according to the application, it is preferable to provide an intermediate layer having gas barrier properties from the viewpoint of maintaining the freshness of alcoholic beverages. For this, for example, a gas barrier film can be used.

  As this gas barrier film, for example, ethylene vinyl alcohol copolymer (EVOH), nylon, polyethylene terephthalate, polyvinylidene chloride and the like can be used, and a silica vapor deposition film can also be used.

  The overall shape of the cup portion can take various shapes, for example, it can be a cylindrical shape, and on the basis of this cylindrical shape, it is gradually removed from the bottom of the cup portion to the opening. It can be set as the shape which a diameter spreads, the shape which becomes narrow gradually, and the shape which has a constriction or swelling in the middle of a trunk | drum.

  As a material for the cup part, a general material that blocks liquid and gas with a non-metallic material can be used. For example, heat-resistant glass, heat-resistant ceramic, and polypropylene, polyethylene, polyester, polystyrene, vinyl chloride, polycarbonate, Resin such as acrylic, PET (polyethylene terephthalate), A-PET (amorphous polyethylene terephthalate), ethylene vinyl alcohol copolymer, polyethylene naphthalate, etc. can be used, and lamination with materials selected from these and paper Materials can be used. From the viewpoint of the ease of making the peripheral surface of the cup opening a smooth surface, it is preferable to use a resin as the material of the peripheral surface of the opening. Particularly, PET (polyethylene terephthalate) from the viewpoint of compatibility with beverages and environmental suitability. In particular, A-PET (amorphous polyethylene terephthalate) is particularly preferable.

  In order to mold the above-mentioned material and produce a cup portion, a normal method can be used. For example, in the case of a resin, vacuum / pressure molding, vacuum molding, injection molding, or the like can be used.

  The state of adhesion of the lid of the container for liquor of the present invention is a state in which after the temperature of the liquor drink exceeds an appropriate temperature by heating with a microwave oven, it is opened with a popping sound due to an increase in internal pressure.

  When the adhesive state is a state in which a popping sound is generated and preferably a region of more than one-third of the lid is opened, particularly preferably, a region of more than half of the lid is opened, an excessively heated beverage squirt The risk of this can be made extremely small.

  Moreover, when the said adhesion state is made into the state opened with a plosive sound when reaching the temperature of 75-85 degreeC, alcohol concentration 10-40 mass%, Preferably 10-18 mass%, In particular, it is preferable as a container for alcoholic beverages of the present invention for filling 12 to 16% by mass of alcoholic beverages. Examples of alcoholic beverages having such a concentration include sake, synthetic sake, shochu, old sake, or dilutions thereof. The container for alcoholic beverages of the present invention is particularly suitable as a container for sake and synthetic sake. It is.

  That is, coffee, black tea, Japanese tea, oolong tea, etc. are generally extracted at 80 to 100 ° C. and at least at a temperature of 60 ° C. or more. Even if it is a drink, what was provided at the temperature close | similar to this is liked. When the beverage in a container heated for such a temperature range of 80 ° C. or higher is further heated excessively due to an erroneous operation of the microwave oven, the temperature is so high that there is a risk of severe burns. And easily reach.

  However, alcoholic beverages such as sake are preferred to drink at a lower temperature than general beverages such as coffee. The proper temperature range for sake brewer's sake is 40-60 ° C, and from such traditional customs, other liquors are also preferred to drink at temperatures close to this. When the alcoholic beverage in a container heated for such a temperature range of 40 to 60 ° C. is further overheated by an erroneous operation of the microwave oven, the temperature is so high that there is a risk of severe burns. Before it becomes, there is a space in the temperature range.

  By selecting the temperature range peculiar to the alcoholic beverage, that is, the temperature region of 75 to 85 ° C. as the temperature range for opening the lid, in a preferred embodiment of the container for alcoholic beverages of the present invention, alcoholic beverages such as sake It can be opened at a temperature that is beyond the range of 40 to 60 ° C., which is a suitable temperature for beverages, and that does not pose a danger of causing severe burns.

  On the other hand, the heating operation in the microwave oven is often instructed with the heating time at the output as a guide, but even at room temperature, it fluctuates about 15 ° C. per year, so the temperature reached at the same heating time is You will be subject to range fluctuations. In order to provide a heated liquor beverage in an unopened and convenient container that can reliably respond to the preference of high temperature coffee, the higher the temperature when the lid is opened in the present invention, the better However, in consideration of the change in room temperature, the temperature range at which the lid is opened should be 75 ° C. or higher, which is at least 15 ° C. higher than 60 ° C. which is the upper limit of the appropriate temperature range 40 to 60 ° C. Is preferred.

  Furthermore, the temperature at the time of opening the lid in the present invention is preferably as low as possible from the viewpoint of safety, but, for example, a higher temperature of drinking tea for Japanese tea is recognized up to 85 ° C. Therefore, the temperature range at which the lid is opened is preferably 85 ° C. or lower.

  This is based on the knowledge that an aqueous solution having an ethanol concentration of about 15% by mass has a boiling point near 85 ° C., which is lower than the boiling point of pure water, which is 100 ° C. The knowledge of having a boiling point lower than that of pure water in terms of concentration is also used.

  In the preferred embodiment of the present invention, it was confirmed that, in the temperature range of 75 to 85 ° C., the preferred opening was particularly in the temperature range of 79 to 82 ° C. and further 80 to 81 ° C.

  Furthermore, it is preferable that the adhesive state between the lid and the periphery of the cup opening is formed uniformly. As a result, the pressure from the inside of the container is uniformly transmitted, so that the unsealing of the lid can occur simultaneously in a wide area of the adhesive surface.

  For this reason, it is preferable that the end surface of the periphery of the cup opening is a surface suitable for adhesion to the lid, and is formed as a smooth surface from the viewpoint of forming uniform adhesion. That is, in a preferred embodiment, the periphery of the cup opening that can be bonded to the lid extends in a lateral direction from the end of the cup to the body of the cup to form an annular shape, and the surface on the side to be bonded to the lid Is a smooth surface.

  Moreover, it is preferable from a viewpoint of opening that the adhesive strength between the lid and the periphery of the cup opening is in the range of 3 to 17 N / 15 mm, more preferably 5 to 15 N / 15 mm, particularly 6 to 12 N / 15 mm. The range of is preferable. If the adhesive strength is less than this, it may be opened when the alcoholic beverage is not sufficiently heated.If the adhesive strength is higher than this, the alcoholic beverage may be overheated due to a misoperation. However, the internal temperature and pressure may rise further without opening.

  Further, the adhesion between the lid and the periphery of the cup opening is such that the adhesion is in the range of 40 to 79 kPa, preferably 45 to 76 kPa, more preferably 50 to 69 kPa from atmospheric pressure, at atmospheric pressure. It is particularly preferable that the adhesive state be opened when the internal pressure reaches a high level in the range of 51 to 69 kPa. If the adhesive is opened at a lower internal pressure (difference from the external pressure), it may be opened when the alcoholic beverage is not sufficiently heated. In some cases, the internal temperature and pressure may further increase without opening even if the heating is already excessive due to an erroneous operation.

  And the container for liquor of this invention can be advantageously obtained by taking the above-mentioned structure about a cover, a cup, and an adhesion state.

  Hereinafter, the present invention will be described in detail by way of examples. The present invention is not limited to the examples.

  The materials used in the examples are as follows.

(A) Resin film cover A film having a multilayer structure of polyethylene / polyester adhesive resin / heat-sealable PET (trade name: ABF64C 30th; manufactured by Tosero Co., Ltd.) was prepared as an easy peel open film.
Unstretched nylon (thickness 20 μm) (surface layer) / EVOH film (thickness 15 μm) (gas barrier film, intermediate layer) / easy peel open film (thickness 30 μm) (adhesive layer) are bonded by dry lamination. Then, a film having a multilayer structure was prepared, and this was cut into a disk shape to prepare a resin film lid.

(B) Resin molded drop pig As an easy peel open film, a film having a multilayer structure of polyethylene / polyester adhesive resin / heat-sealable PET as in the case of a resin film lid (trade name: ABF64C 30th; Tosero Co., Ltd.) Prepared).
Polyethylene resin is dropped and molded into a pig shape, and then an easy peel open film is adhered to it by dry laminating to form a resin molded drop pig with the structure of polyethylene resin (thickness 250 μm) (base material) / easy peel open film. Created.

(C) Aluminum film cover Linear low-density polyethylene film (trade name: TUX VC 30th; manufactured by Tosero Co., Ltd.) is bonded to the aluminum film by dry lamination and cut into a disk shape. Thus, an aluminum film lid having a configuration of aluminum film (thickness 29 μm) / linear low density polyethylene film was prepared.

(D) Aluminum molded drop pig An aluminum plate is dropped into a pig shape, and a linear low density polyethylene film (trade name: TUX VC 30th; manufactured by Tosero Co., Ltd.) is used as an adhesive material. Adhesion was performed by dry lamination to produce an aluminum molded drop pig having a structure of aluminum (thickness 40 μm) (base material) / linear low density polyethylene film.

(E) Cup A-PET (amorphous polyethylene terephthalate) was injection-molded to form a cup having a cylindrical shape as a base and gradually increasing in outer diameter toward the opening. The volume was 200 ml, and the resin thickness was a 300 μm cup. The periphery of the cup opening that can be bonded to the lid is an annular shape that extends laterally from the end of the cup to the body of the cup, and the surface that is bonded to the lid is a smooth surface.

(F) Sake Sake with an ethanol concentration of 15% by mass (manufactured by Kikumasamune Shuzo Co., Ltd.) was used.

Production of a container containing alcoholic beverages A cup was filled with 180 ml of sake, and the lid was immediately closed, and the lid and the cup were thermocompressed and sealed with the sealing strength shown later. Thereafter, the sake was allowed to stand at room temperature for 3 hours to bring the sake to room temperature. Sake-containing containers equipped with the above-mentioned four types of lids were prepared. Among the sake-containing containers that had reached room temperature, those with a lid as the film were inferred that the lid was dented inward and that the interior was at a negative pressure relative to atmospheric pressure. The adhesive strength between the lid and the cup was as shown later.

  Moreover, in order to test the suitability as a container, a drop test of a container containing sake was performed. In the drop test, a group of sake-containing containers was prepared, and the container was dropped twice from the side of the container and dropped twice from the bottom from the height of 50 cm.

Heating and Evaluation Method Using Microwave Oven The produced sake-containing container was heated using a household microwave oven with an output of 500 W. A group of sake-containing containers was taken out of the microwave oven after heating for 1 minute, and the lid was removed by hand and opened. In this case, all the internal sake was heated to about 50 ° C. Further, the opening feeling of the lid when opened by this hand and the state of the uncut portion of the lid adhesive portion were observed. Another group of sake-containing containers continued to be heated for more than 1 minute, and each state was observed when heated for more than 2 minutes. The temperature was measured with a mercury thermometer.

  In addition, the adhesive strength is the same material as that of each lid and cup, and an adhesive piece (15 mm × 25 mm) is prepared, and the measurement is performed as follows. did.

  Measure the load value when the resin film and the adherend resin are peeled off by slightly peeling the ends of the above-mentioned adhesive pieces, holding the peeled ends, and separating them from each other at a speed of 20 mm / min. This value was defined as the adhesive strength. The value of the adhesive strength was converted into a uniform value when the width of the test piece was 15 mm and displayed in units of N / 15 mm.

  These results are shown below.

封緘強度 ２８２ｍｍＨｇ
熱圧着温度 １２０℃
接着強度 １５．２Ｎ／１５ｍｍ
落下試験 落下試験後に液体の漏れなし

加熱開始１分後の状態 フタは開封せず、清酒温度５０℃
手による開封感 開けやすい
フタ切れ残り フタ接着部分の切れ残りは、ほとんどない

加熱開始２分以後の状態
フタは、すでに上方に膨らんでいた。まもなくポンという破裂音ととも
にフタの３分の２以上が開封した。このときの清酒の温度は、８０℃であった。
これを手にこぼしたところ、熱さは感じたが、火傷には至らなかった。

(1) Container with sake using a resin film lid

Sealing strength 282mmHg
Thermocompression bonding temperature 120 ℃
Adhesive strength 15.2N / 15mm
Drop test No liquid leakage after drop test

The state after 1 minute of heating The lid is not opened and the sake temperature is 50 ° C.
Opening feeling by hand Easy to open lid breakage

State after 2 minutes from start of heating The lid had already swelled upward. Soon, more than two-thirds of the lid opened with a popping pop. The temperature of the sake at this time was 80 ° C.
When I spilled this on my hand, I felt the heat but did not cause burns.

封緘強度 ３００ｍｍＨｇ以上
熱圧着温度 １２０℃
接着強度 ３３．３Ｎ／１５ｍｍ
落下試験 側面落下試験後に液体の漏れが生じた

加熱開始１分後の状態 フタは開封せず、清酒温度５０℃
手による開封感 非常に硬く開けにくい
フタ切れ残り フタ接着部分の切れ残りは、ほとんどない

加熱開始２分以後の状態
フタの一部がしばらくすると剥離し、それと同時にその部分から清酒が
噴水のように激しく吹き出してきた。吹き出すときの清酒の温度は、９０℃であ
った。剥離に際して、音は聞こえなかった。

(2) Sake-containing containers using resin-molded pigs

Sealing strength 300mmHg or more Thermocompression bonding temperature 120 ℃
Adhesive strength 33.3N / 15mm
Drop test Liquid leakage after side drop test

The state after 1 minute of heating The lid is not opened and the sake temperature is 50 ° C.
Opening feeling by hand Very hard and difficult to open.

A state after 2 minutes from the start of heating A part of the lid peeled off after a while, and at the same time, sake was blown out violently like a fountain. The temperature of the sake when blown out was 90 ° C. Upon peeling, no sound was heard.

封緘強度 ３００ｍｍＨｇ以上
熱圧着温度 １２０℃
接着強度 ２２．９Ｎ／１５ｍｍ
落下試験 落下試験後に液体の漏れなし

加熱開始１分後の状態 フタは開封せず、清酒温度５０℃
手による開封感 開けやすい
フタ切れ残り アルミフィルム層ごと、ところどころ切れて残る

加熱開始２分以後の状態
フタの一部がしばらくすると剥離した。その後、その部分から清酒が噴
水のように激しく吹き出してきた。剥離したときの清酒の温度は８５℃であった。
吹き出すときの清酒の温度は９０℃であった。剥離に際して、音は聞こえなかっ
た。

(3) Container with sake using an aluminum film lid

Sealing strength 300mmHg or more Thermocompression bonding temperature 120 ℃
Adhesive strength 22.9N / 15mm
Drop test No liquid leakage after drop test

The state after 1 minute of heating The lid is not opened and the sake temperature is 50 ° C.
Opening feeling by hand Easy to open lid residue Uncut with aluminum film layer

State after 2 minutes from the start of heating Part of the lid peeled off after a while. After that, Sake came out violently like a fountain. The temperature of the sake when peeled was 85 ° C.
The temperature of the sake when blown out was 90 ° C. Upon peeling, no sound was heard.

封緘強度 ３００ｍｍＨｇ以上
熱圧着温度 １２０℃
接着強度 ４７．０Ｎ／１５ｍｍ
落下試験 落下試験後に液体の漏れなし

加熱開始１分後の状態 フタは開封せず、清酒温度５０℃
手による開封感 非常に硬く開けにくい
フタ切れ残り 接着材料が残り、気になる

加熱開始２分以後の状態
フタの一部がしばらくすると剥離し、それと同時にその部分から清酒が
噴水のように激しく吹き出してきた。吹き出すときの清酒の温度は、９０℃であ
った。剥離に際して、音は聞こえなかった。

(4) Container with sake using aluminum molded pigs

Sealing strength 300mmHg or more Thermocompression bonding temperature 120 ℃
Adhesive strength 47.0N / 15mm
Drop test No liquid leakage after drop test

The state after 1 minute of heating The lid is not opened and the sake temperature is 50 ° C.
Opening feeling by hand Very hard and difficult to open lid cover remains Adhesive material remains and is worrisome

A state after 2 minutes from the start of heating A part of the lid peeled off after a while, and at the same time, sake was blown out violently like a fountain. The temperature of the sake when blown out was 90 ° C. Upon peeling, no sound was heard.

  From the above results, the following was found.

  In all the sake-containing containers, 1 minute after the start of heating by the microwave oven, the internal sake became an appropriate temperature of 50 ° C. When heated continuously after 2 minutes, the sake-containing container (1) using the resin film lid (A) of the present invention has a popping sound that can be clearly heard from outside the cooking cabinet and more than two-thirds of the lid. Opened. The sake at this time was not hot enough to cause burns. On the other hand, when heated continuously after 2 minutes, the sake-containing containers (2) to (4) using lids (B) to (D) other than the resin film lid (A) of the present invention are The hot sake began to erupt without producing a sound that could be clearly recognized by the operator.

  In addition, in the comparison of whether it is easy to open by hand when it is taken out 1 minute after the start of heating, and whether or not the lid residue or part of the adhesive material adheres to the container and does not show an unnatural appearance, The sake-filled container (1) using the resin film lid (A) of the invention was easy to open and did not leave any uncut residue, indicating excellent container performance. On the other hand, the sake-containing containers (2) to (4) using the lids (B) to (D) other than the resin film lid (A) of the present invention are unnatural because they are difficult to open or remain uncut. I did.

  As described above, the container for alcoholic beverages of the present invention can be heated without opening the lid using a microwave oven, has excellent opening feeling, etc. as a container in that case, and is overheated by an erroneous operation. Even if it is opened, it is opened with a bursting sound that gives a warning, and the operator is noted. On the other hand, it was found that a hot beverage eruption or an unexpected burst does not occur.

  Hereinafter, the present invention will be described in detail with different embodiments.

  The materials used in the examples are as follows.

(G) Resin film 1
As an easy peel open film, a film having a multilayer structure of polyethylene / polyester adhesive resin / heat-sealable PET (trade name: ABF64C No. 30; manufactured by Tosero Co., Ltd.) was prepared.

  Unstretched nylon (thickness 20 μm) (surface layer) / EVOH film (thickness 15 μm) (gas barrier film, intermediate layer) / easy peel open film (thickness 30 μm) (adhesive layer) are bonded by dry lamination. A film having a multilayer structure was prepared, and this was cut into 15 mm × 25 mm and used as the resin film 1.

  This is a film having the same multilayer structure as the resin film cover (A) in Example 1.

(H) Resin film 2
As an easy peel open film, a film having a multilayer structure of polyethylene / polyester adhesive resin / heat-sealable PET (trade name: ABF65C 30th; manufactured by Tosero Co., Ltd.) was prepared.

  Unstretched nylon (thickness 20 μm) (surface layer) / EVOH film (thickness 15 μm) (gas barrier film, intermediate layer) / easy peel open film (thickness 30 μm) (adhesive layer) are bonded by dry lamination. A film having a multilayer structure was prepared, and this was cut into 15 mm × 25 mm and used as the resin film 2.

  This resin film 2 is a film having the same multilayer structure except that ABF65C is used instead of ABF64C in the resin film 1. ABF65C is obtained by changing the heat-sealable PET in ABF64C to enable thermocompression bonding at a lower temperature. The difference in the characteristics is as shown in the results of the following experiments.

(I) Adherent resin As an adhesive resin, A-PET (amorphous polyethylene terephthalate) having a thickness of 300 μm and a size of 15 mm × 25 mm was prepared.

Preparation of thermocompression-bonding piece The resin film 1 or the resin film 2 was thermocompression-bonded to the adherend resin at a pressure of 0.2 MPa and a time of 1.0 seconds. About each, the small piece which carried out the thermocompression bonding at the different temperature from 100 degreeC to 200 degreeC was produced.

Adhesive strength measurement Adhesive resin film and adherend resin end are peeled off slightly, the peeled ends are sandwiched and separated from each other at a speed of 20 mm / min to separate the resin film and adherend resin. The load value at the time of making was measured and this value was made into adhesive strength. The value of the adhesive strength was converted into a uniform value when the width of the test piece was 15 mm and displayed in units of N / 15 mm.

  These results are shown in FIG.

  5 shows a thermocompression-bonded piece (PET / 64C, shown in FIG. 5) of the adherend resin and the resin film 1, and a thermocompression-bonded piece (PET / 65C, shown in FIG. 5) of the adherend resin and the resin film 2. And (notation) are graphs in which the adhesive strength (N / 15 mm) is measured after thermocompression bonding at the temperature on the horizontal axis and indicated on the vertical axis.

  From the results shown in FIG. 5, the following was found.

  In the thermocompression-bonded piece of the adherend resin and the resin film 1, an adhesive strength in the range of 5 to 15 N / 15 mm was obtained by thermocompression bonding in the temperature range of 110 to 130 ° C., whereas the adherend resin and resin In the thermocompression-bonded piece of film 2, an adhesive strength in the range of 5 to 15 N / 15 mm was obtained by thermocompression bonding in the temperature range of 110 to 180 ° C.

  And the container (1) containing sake using the resin film cover (A) in Example 1 using the combination of the adherend resin and the resin film 1 and the combination of the adherend resin and the resin film 2 in Example 2. )), The adhesive strength in the range of 5 to 15 N / 15 mm was an appropriate range as the strength at which more than two-thirds of the lid was opened together with the popping sound clearly audible from outside the range cabinet. It was.

  That is, in the thermocompression-bonding piece of the adherend resin and the resin film 1, thermocompression bonding in the temperature range of 110 to 130 ° C. was appropriate for use in the container for alcoholic beverages of the present invention. In the thermocompression-bonded piece of the body resin and the resin film 2, thermocompression bonding in a relatively wide temperature range of 110 to 180 ° C. was excellent in that it can be used for the alcoholic beverage container of the present invention, but in any case. By controlling the adhesive strength, the combination of the adherend resin and the resin film 1 or the combination of the adherend resin and the resin film 2 can be used for the alcoholic beverage container of the present invention. It was found that the suitable adhesive strength is preferably in the range of 5 to 15 N / 15 mm, particularly 6 to 12 N / 15 mm.

  Hereinafter, the present invention will be described in detail with different embodiments.

Experimental Method A magnetic stirrer (length: about 2 cm, diameter: 6 mm, cylindrical shape) covered with a Teflon (registered trademark) resin was placed in advance in a heat-resistant glass Erlenmeyer flask (volume: 200 ml). This Erlenmeyer flask was filled with 180 ml of sake (produced by Kikumasou Shuzo Co., Ltd.) having an ethanol concentration of 14 mass% at room temperature and sealed with a silicone rubber stopper. The temperature of sake during the experiment was measured with a mercury thermometer inserted in advance through a silicon rubber stopper. Moreover, the internal pressure of the container under experiment was measured as a difference from the external air pressure by connecting a tube part inserted through a silicone rubber stopper in advance to a manometer. The sake contained in the Erlenmeyer flask was heated under atmospheric pressure while stirring with a heated magnetic stirrer, and the temperature of the sake and the internal pressure of each temperature (difference between the external pressure) were measured. The measurement was performed on three sets of sake in a similarly prepared Erlenmeyer flask. The results are shown in Table 1. (The second measurement in Table 1 was performed up to 81 ° C. because the silicone rubber plug was detached midway.)

  [Table 1] Relationship between sake temperature and internal pressure of the container (difference from external pressure)

  From the results shown in Table 1, the following was found.

  As the sake temperature increased, the internal pressure of the container (internal pressure) increased. When the sake temperature reaches 75 ° C, it can be read that the internal pressure is higher than the external pressure in the range of 45-50 kPa, and when the sake temperature reaches 78 ° C, the internal pressure is in the range of 51-56 kPa. When the sake temperature is 80 to 81 ° C., the internal pressure is in the range of 55 to 64 kPa. When the sake temperature is 83 ° C., the internal pressure is in the range of 63 to 69 kPa, and when the sake temperature is 85 ° C., 69 to The internal pressure in the range of 76 kPa is shown.

On the other hand, the container for alcoholic beverages of the present invention is preferably opened when a temperature of 75 to 85 ° C. is reached, and in a particularly preferred embodiment, it is opened at a sake temperature of 80 to 81 ° C. It was. The range of internal pressure corresponding to these temperatures was found from the results in Table 1. That is, the alcoholic beverage container of the present invention can be advantageously obtained by setting the adhesive state between the lid and the periphery of the cup opening when the internal pressure range is reached.

It is explanatory drawing which showed one example of the aspect of implementation of the container for liquor of this invention. It is explanatory drawing which showed the state by which the container for alcoholic beverages of FIG. 1 was opened by heating too much. It is explanatory drawing which expanded partially the cup opening part vicinity (AA cross section) of the container for alcoholic beverages of FIG. It is explanatory drawing which expanded partially the cup opening part vicinity (AA cross section) of the container for alcoholic beverages of FIG. It is the graph which showed the relationship between thermocompression bonding temperature and adhesive strength in the combination of to-be-adhered body resin and resin film relevant to this invention. (Example 2)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cover 2 Surface layer 3 Adhesive layer 5 Cup 6 Cup opening periphery 6a Surface of cup opening periphery

Claims (10)

In a container for an alcoholic beverage comprising a cup having an opening and a lid for closing the opening,
The lid is adhered to the periphery of the cup opening to seal the container, and the lid adheres to a popping sound due to an increase in internal pressure after the temperature of the alcoholic beverage exceeds an appropriate temperature by heating with a microwave oven. A container for alcoholic beverages, which is in an adhesive state to be opened.   2. The adhesive state according to claim 1, wherein when the alcoholic beverage having an alcohol concentration of 10 to 18% by mass reaches a temperature of 75 to 85 ° C., a plosive sound is generated and opened. Container for alcoholic beverages.   3. The alcoholic beverage according to claim 1, wherein the adhesive state is an adhesive state that is opened when the internal pressure reaches an internal pressure that is higher by 45 to 76 kPa than the atmospheric pressure under atmospheric pressure. 4. Beverage container.   The liquor beverage container according to any one of claims 1 to 3, wherein the adhesion state is a state in which a popping sound is generated and at least one third of the lid is opened.   The lid has a multilayer structure including an outer surface layer and an adhesive layer bonded to the cup opening, the surface layer is made of a material having flexibility, and the adhesive layer is made of a material having thermocompression bonding property. The alcoholic beverage container according to any one of claims 1 to 4, wherein the beverage beverage container is formed.   The alcoholic beverage container according to any one of claims 1 to 5, wherein a surface of the cup opening peripheral edge to which the lid is bonded is formed as an annular smooth surface having a predetermined width. In a container for an alcoholic beverage comprising a cup having an opening and a lid for closing the opening,
The lid has a multi-layer structure including a surface layer and an adhesive layer, the surface layer is made of a flexible material, the adhesive layer is made of a material having thermocompression bonding, and the lid has a peripheral edge of the cup opening. A container for alcoholic beverages, characterized in that the adhesive strength is in the range of 5 to 15 N / 15 mm.   The container for alcoholic beverages according to claim 7, wherein the adhesive by thermocompression bonding is an adhesive state that is opened when the internal pressure reaches a pressure that is higher by 45 to 76 kPa than atmospheric pressure under atmospheric pressure. .   The said surface layer contains unstretched nylon, The container for alcoholic beverages in any one of Claims 5-8 characterized by the above-mentioned. The container for alcoholic beverages according to any one of claims 5 to 9, wherein the cup opening peripheral edge is made of a material containing PET or A-PET, and the adhesive layer contains PET.

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