JPH06144475A - Packaging case for hot vending - Google Patents

Abstract

PURPOSE:To shorten the time required for heating and prevent smell of a packaging case from being transferred to a drink by forming a supporter layer and forming then a resin layer on both the inner and outer sides of a thin foil layer comprising ferromagnetic and conductive material. CONSTITUTION:The inner side surface of a paper material 3 constituting a supporter layer of a packaging member 2 is covered with a steel foil 5 comprising thin foil layer made from ferromagnetic and conductive material through an adhesive resin layer 4. And the inner side surface of the steel foil 5 is covered with a polyethylene resin layer 6. On the other hand, a polyethylene resin layer 7 is formed on the outer surface of the paper material 3. The packaging member 2 having such laminated structure is formed into a brick-shaped packaging case 1. As a result, the thin foil layer of the case 1 is heated so that a drink is directly heated by said layer, with the result that the time required for heating can be shortened and smell of the case 1 is prevented from being transferred to a drink and heat insulation function is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot-bending packaging container.

[0002]

2. Description of the Related Art Conventionally, fluid beverages such as soft drinks are generally sold in a packaging container made of a packaging material in which the outer surface and the inner surface of a paper material are coated with polyethylene resin or the like. The packaging containers include gable-top packaging containers with a slanted top portion and brick-shaped packaging containers with a flat top portion, but in the case of relatively small volumes, they are generally sold in stores or automatically. They are sold by machine and are often drunk on the spot by the purchaser. Therefore, the purchaser can purchase the beverage stored in the vending machine provided with the cooling means or the heating means and maintained at a low temperature or a high temperature.

For example, in an automatic vending machine provided with a heating means, a warm air blower is used as the heating means, and the hot air blower generates warm air and applies it to each packaging container for heating. There is. FIG. 2 is a sectional view of a vending machine provided with a conventional heating means. In the figure, 9 is a packaging container that contains a fluid beverage such as a soft drink, and is composed of a packaging material in which the outer surface and the inner surface of a paper material are coated with a polyethylene resin layer, and 11 is a case insulated by a heat insulating material. , 12a and 12b are spiral plates for mounting the packaging container 9, 13a and 13b are motors for rotating the spiral plates 12a and 12b, and 15 is a case 11.
A thermometer for displaying the internal temperature, 17 is a heater for heating the air in the case 11 by resistance heating, and 18 is the case 11
A fan that circulates the air in the inside, 19 detects the temperature of the air collected after heating each packaging container 9, and controls the heater 17 corresponding to the temperature, an automatic temperature adjusting device 21, 21 a selling port, 22 Is a door for taking out the packaging container 9.

In the vending machine having the above structure, the heater 1
The air heated by 7 is circulated in the case 11 by the fan 18, and contacts the packaging containers 9 to heat them. Then, the air after the packaging container 9 is collected is returned to the heater 17 and heated by the heater 17.

[0005]

However, in the above-mentioned conventional vending machine, the heater 17 heats the air in the case 11 and circulates the air to wrap the packaging container 9 therein.
Since it is designed to be heated, the time required for heating becomes, for example, 4 to 5 hours, and the purchaser cannot purchase the drink during that time, and the drink itself in the packaging container 9 is deteriorated by the heat. Or the odor of the packaging container 9 is transferred to the beverage.

When the packaging container 9 is heated for a long time, the polyethylene resin layer and the strip tape provided in the packaging container 9 are deteriorated and the gas barrier property is deteriorated.
Air may enter the inside and change the quality of the beverage. The present invention solves the problem of the packaging container housed in the conventional vending machine, it is possible to shorten the time required for heating, the beverage itself in the packaging container is deteriorated by heat,
An object of the present invention is to provide a packaging container for hot bending in which the smell of the packaging container is not transferred to the beverage.

[0007]

Therefore, the packaging container for hot bending of the present invention is formed by processing a packaging material composed of a laminated body, and accommodates a beverage therein. A support layer and a thin foil layer made of a ferromagnetic and conductive material are provided, and a resin layer is formed inside the support layer and the thin foil layer. And a resin layer is formed outside the thin foil layer.

The thin foil layer is formed inside the support layer,
Also, the thin foil layer can be a steel foil.

[0009]

According to the present invention, as described above, the hot bending packaging container is formed by processing the packaging material formed of the laminated body, and the beverage is contained therein. A support layer and a thin foil layer made of a ferromagnetic and conductive material, a resin layer is formed inside the support layer and the thin foil layer, the support layer and the thin foil layer A resin layer is formed on the outside.

Therefore, when the hot-bending packaging container is housed in an induction heating type vending machine and a low-frequency current or a high-frequency current is supplied to the coil, an alternating magnetic field is generated and a thin foil layer of the hot-bending packaging container is generated. An eddy current flows. Then, the thin foil layer is heated by the eddy current loss and the hysteresis loss, and the beverage contained in the hot bending packaging container is heated by the thin foil layer.

When the thin foil layer is formed inside the support layer, the heat generated in the thin foil layer is easily transferred to the beverage because the thin foil layer is located inside the support layer. Since the layer functions as a heat insulating material, heat retention is improved.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view of a hot bending packaging container showing a first embodiment of the present invention, and FIG. 3 is a partially cutaway perspective view of a hot bending packaging container showing a first embodiment of the present invention.

In the figure, reference numeral 1 denotes a hot-bending packaging container, which is formed by molding a packaging material 2 composed of a laminated body into a brick shape as shown in FIG. 3, for example.
A fluid drink such as a soft drink is stored inside. 3 is a paper material that constitutes the support layer of the packaging material 2. In this embodiment, the hot-bending packaging container 1 has a brick shape, but it may be a gable top type.

On the surface of the inside of the paper material 3 (inside of the hot-bending packaging container 1), a thin foil layer made of a ferromagnetic and conductive material is provided via an adhesive resin layer 4 made of polyethylene resin or the like, For example, a steel foil 5 having a thickness of 8 to 12 [μ] is coated. The steel foil 5
Can be obtained by forming a steel material containing at least iron into a foil shape. The steel foil 5 forms a light and gas barrier for the beverage contained in the hot-bending packaging container 1 and prevents the beverage contained in the hot-bending packaging container 1 from being altered.

A polyethylene resin layer 6 is coated on the inner surface of the steel foil 5. The adhesive resin layer 4 is provided to improve the adhesiveness between the paper material 3 and the steel foil 5. On the other hand, the polyethylene resin layer 7 is coated on the outer surface of the paper material 3 (outer surface of the hot-bending packaging container 1).

By the way, when trying to drink a beverage such as a soft drink in a heated state, a heating means may be provided in the vending machine and the beverage in the hot-bending packaging container 1 may be heated by the heating means. it can. in this case,
Heater 17 by resistance heating as a heating means (see FIG. 2)
If you use, the air in the case 11 becomes a heating medium,
The packaging container 1 for hot bending is indirectly heated. Therefore, it takes a long time until the beverage in the hot bending packaging container 1 is sufficiently heated,
The beverage itself in the hot bending packaging container 1 is deteriorated by heat, or the odor of the hot bending packaging container 1 is transferred to the beverage.

Therefore, the hot bending packaging container 1 of the present invention is heated by utilizing induction heating. FIG. 4 is a sectional view of a vending machine for heating the packaging container for hot bending of the present invention. In the figure, 1 is a packaging container for hot bending having a steel foil 5 (FIG. 1), 11 is a case insulated by a heat insulating material, 12
Reference numerals a and 12b are spiral plates on which the hot-bending packaging container 1 is placed, 13a and 13b are motors for rotating the spiral plates 12a and 12b, and 30 is a housing for housing the spiral plates 12a and 12b. ,
Reference numeral 31 is a plurality of coils that are arranged so as to surround the housing 30.

The coils 31 are arranged in parallel along the longitudinal direction of the outer circumference of the casing 30, and are supported by yokes 32 arranged on the outer circumference. The yoke 32 is made of a laminated iron plate to facilitate passage of the magnetic flux and prevent the magnetic flux from leaking to the outside. An inverter circuit 35 is connected to the coil 31, and when a low frequency current or a high frequency current generated by the inverter circuit 35 is supplied to the coil 31, an alternating magnetic field is generated in the housing 30. Incidentally, 37 is an AC power supply, and the AD conversion circuit 38 converts AC from the AC power supply 37 into DC. Further, 21 is a selling port, and 22 is a door for taking out the packaging container 1 for hot bending.

In the vending machine having the above structure, when the low frequency current or the high frequency current generated by the inverter circuit 35 is supplied to the coil 31, an alternating magnetic field is generated in the housing 30. Then, the alternating magnetic field changes the amount of magnetic flux interlinking the steel foil 5 of the hot-bending packaging container 1 housed in the housing 30. At this time, since the steel foil 5 is made of a conductive material, an electromotive force is induced on the surface, and an eddy current flows in a direction that hinders the change of the magnetic flux due to the alternating magnetic field.

When the eddy current flows, power loss, that is, eddy current loss occurs due to the resistance of the steel foil 5, Joule heat is generated, and the temperature of the steel foil 5 rises. Further, since the steel foil 5 is made of a ferromagnetic material, it is periodically magnetized in the opposite direction by the alternating magnetic field. At this time, the magnetic flux remains in the steel foil 5 to cause a hysteresis phenomenon, energy corresponding to the area of the hysteresis loop is consumed in the steel foil 5, hysteresis loss occurs, heat is generated, and the temperature of the steel foil 5 changes. To rise.

Therefore, the beverage contained in the hot bending packaging container 1 can be heated by the steel foil 5. In this case, since the melting point of the polyethylene resin is 110 [° C], there is no problem even if it is heated to about 70 to 80 [° C] by induction heating. Although the aluminum foil layer is provided in the packaging material used in the conventional packaging container, the resistivity of iron is 9.71 [μΩ · cm] when induction heating is performed. hand,
Since the resistivity of aluminum is 2.655 [μΩ · cm], which is extremely low, a small amount of Joule heat is generated. Therefore, the eddy current loss cannot be used.

Further, while the specific magnetic susceptibility of iron is on the order of 10 ³ and the specific magnetic susceptibility of aluminum is on the order of 10 ⁻⁶ , and aluminum is a non-magnetic material,
Even when placed in a magnetic field having the same magnetic field strength, the magnetic flux density is low, and the hysteresis loss cannot be used. In this way, the steel foil 5 of the hot-bending packaging container 1 is heated, and the beverage is directly heated by the steel foil 5, so that the time required for heating can be shortened. The heat of the beverage itself does not deteriorate, and the odor of the packaging container 1 for hot bending, such as the smell of polyethylene resin, is not transferred to the beverage.

Further, a steel foil 5 is provided inside the paper material 3.
Is located, the heat generated in the steel foil 5 is easily transferred to the beverage, and since the paper material 3 functions as a heat insulating material, heat retention is improved and it does not feel hot to the touch. Since the hot-bending packaging container 1 is not heated for a long time, for example, the polyethylene resin layers 6, 7 and the strip tape made of polyethylene resin heat-sealed in the hot-bending packaging container 1 are not deteriorated. The gas barrier property can be maintained.

When the hot-bending packaging container 1 after drinking the beverage is incinerated, the steel foil 5 becomes a powder. Therefore, it can be easily collected by a magnet or the like. Although steel is used as the ferromagnetic and conductive material in this embodiment, other ferromagnetic and conductive metals can also be used.

Next, a second embodiment of the present invention will be described. FIG. 5 is a sectional view of a packaging container for hot bending showing a second embodiment of the present invention. In the figure, 42 is a packaging material, and 43 is a paper material that constitutes the support layer of the packaging material 42. The outer surface of the paper material 43 has a thickness of 8 to 12 through an adhesive resin layer 44 made of polyethylene resin or the like.
A [μ] steel foil 45 is coated.

A polyethylene resin layer 47 is coated on the outer surface of the steel foil 45. The adhesive resin layer 44 includes the paper material 43 and the steel foil 4
It is provided to improve the adhesiveness between the five. On the other hand, a polyethylene resin layer 46 is coated on the inner surface of the paper material 43. Next, a third embodiment of the present invention will be described.

FIG. 6 is a sectional view of a packaging container for hot bending showing a third embodiment of the present invention. In the figure,
52 is a packaging material, 53 is the first constituting the support layer of the packaging material 52.
It is a paper material. The inner surface of the paper material 53 has a thickness of 8 to
12 μ of steel foil 55 is coated.

Then, a second paper material 58 is provided on the inner surface of the steel foil 55, and the second paper material 5 is provided.
The inner surface of 8 is covered with a polyethylene resin layer 56. On the other hand, the polyethylene resin layer 57 is coated on the outer surface of the first paper material 53. It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made based on the spirit of the present invention, and they are not excluded from the scope of the present invention.

[0029]

As described above in detail, according to the present invention, the packaging container for hot bending is formed by processing the packaging material composed of the laminated body, and is adapted to contain the beverage therein. There is. A support layer and a thin foil layer made of a ferromagnetic and conductive material, a resin layer is formed inside the support layer and the thin foil layer, the support layer and the thin foil layer A resin layer is formed on the outside.

Therefore, when the hot bending packaging container is housed in an induction heating type vending machine and a low frequency current or a high frequency current is supplied to the coil, the thin foil layer is heated by eddy current loss and hysteresis loss, The thin foil layer heats the beverage contained in the hot bending packaging container. In this way, the thin foil layer of the hot bending packaging container is heated, and the beverage is directly heated by the thin foil layer, so that the time required for heating can be shortened, and the beverage in the hot bending packaging container can be shortened. It does not deteriorate itself due to heat, and the odor of the packaging container for hot bending, such as the odor of polyethylene resin, is not transferred to the beverage.

Since the hot bending packaging container is not heated for a long time, the resin layer and the strip tape heat-welded in the hot bending packaging container are not deteriorated and the gas barrier property can be maintained. . Further, when the thin foil layer is a steel foil, when the hot-bending packaging container is incinerated after drinking the beverage, the steel foil becomes a powder. Therefore, it can be easily collected by a magnet or the like.

When the thin foil layer is formed inside the support layer, the thin foil layer is located inside the support layer.
The heat generated in the thin foil layer is easily transferred to the beverage, and since the support layer functions as a heat insulating material, heat retention is improved. Therefore, it becomes possible to heat the packaging container for hot bending in a shorter time.

[Brief description of drawings]

FIG. 1 is a sectional view of a packaging container for hot bending showing a first embodiment of the present invention.

FIG. 2 is a sectional view of a vending machine provided with a conventional heating means.

FIG. 3 is a partially cutaway perspective view of the packaging container for hot bending showing the first embodiment of the present invention.

FIG. 4 is a cross-sectional view of a vending machine for heating the packaging container for hot bending of the present invention.

FIG. 5 is a sectional view of a packaging container for hot bending showing a second embodiment of the present invention.

FIG. 6 is a cross-sectional view of a packaging container for hot bending showing a third embodiment of the present invention.

[Explanation of symbols]

1 Packaging container for hot bending 2,42,52 Packaging material 3,43,53,58 Paper material 4,44 Adhesive resin layer 5,45,55 Steel foil 6,7,46,47,56,57 Polyethylene resin layer

Claims (3)

[Claims] 1. A packaging container for hot bending, which is formed by processing a packaging material comprising a laminated body and contains a beverage therein, (a) a support layer, and (b) a ferromagnetic and conductive material. A thin foil layer consisting of (c) a resin layer formed inside the support layer and the thin foil layer, and (d)
A packaging container for hot bending, comprising a resin layer formed outside the support layer and the thin foil layer. 2. The packaging container for hot bending according to claim 1, wherein the thin foil layer is formed inside a support layer. 3. The packaging container for hot bending according to claim 1, wherein the thin foil layer is a steel foil.