JP6772569B2 - Film container - Google Patents

Description

The present invention is a container for food made of a film, which has a self-supporting portion having a folding portion on the bottom surface, and can be cooked in a microwave oven or the like, opened, and eaten as it is as a container. Regarding film containers that can be made.

A self-supporting container made of a film that is self-supporting and uses a small amount of resin, such as a blow bottle, was developed by folding an intermediate film into the bottom side or side surface, and by incorporating a simple mechanism. , Can be produced with a bag making machine.
In particular, a self-supporting container with a folding part on the lower side is highly self-supporting, easy to manufacture, and the contents can be folded compactly before storage, so it is actively used as a package for replacing bottles. It's being used.

By the way, in recent years, it has been proposed to use a film container as a retort pouch and easily cook it in a microwave oven or the like.
Such a film container can be cooked well by heating the food in a state of being stored in the container and releasing the steam generated from the inside when the pressure rises to a certain level. When this film container is used as a retort pouch, the heated film container becomes very hot. In particular, since steam having a temperature of 100 ° C. or higher is ejected from the steam venting portion that allows steam to escape, there is a problem that the surroundings of the steam venting portion are easily burned even if it is handled by hand.

For example, in Patent Document 1, in a bag for heating by a microwave oven, the bottom surface is folded into an inverted V shape and inserted into the bottom surfaces of the front surface and the rear surface formed of a quadrangle constituting the body portion, and the front surface and the rear surface are inserted. The peripheral edge of the bottom surface is heat-sealed to form a top seal portion, a body seal portion, and a bottom seal portion, and the bottom portion can be expanded back and forth by the filled contents to be self-supporting. In a sex packaging bag, a U-shaped seal portion is provided by connecting to the top seal portion or the body seal portion, and a cut or cut is made in the unsealed portion surrounded by the U-shaped seal portion. We are proposing a packaging bag for a microwave oven, which is characterized by having at least one notch.

When this packaging bag for microwave ovens is heated in a microwave oven, the internal pressure rises, and it surely peels off from the U-shaped seal part, and the notch in the unsealed part surrounded by the U-shaped seal part, Alternatively, the vents formed by the notches act as steam vents to maintain a constant internal pressure for cooking.
Further, in order to open the packaging bag for a microwave oven after cooking, a notch is formed on the edge of the body seal portion and torn through this notch to open the bag. The notch shown in the figure is used. Is written on the upper end side of the bag rather than the U-shaped seal portion. When opening from the notch on the upper end side of the U-shaped seal portion, the temperature near this notch is high, and there is a risk of burns.

Japanese Unexamined Patent Publication No. 2005-59872

Therefore, it is an object of the present invention to obtain a film container for cooking that can be safely taken out when it is taken out from a microwave oven after cooking.

The film container of the present invention
It consists of at least a front film, a back film, and a bottom film that folds into the bottom.
It has a seal on the periphery of the left side, right side and bottom.
In a bag-shaped film container having a steam vent on one of the left and right sides,
It has an opening part above the steam vent and parallel to the bottom surface.
An opening start portion is provided on the periphery of the side seal portion on the opposite side of the steam vent portion of the opening portion.
And possess a vapor release section below the bottom side of one side surface with a vapor release section, the upper side of the other side, a wide seal portion,
In the wide seal portion, the height of the lower wide seal portion on the lower bottom surface side of the steam vent portion on one side having the steam vent portion is the same as the height below the upper wide seal portion on the upper side of the other side surface. It is a film container characterized by being steamed.

Since the film container of the present invention has wide seal portions on both the bottom surface side of the steam vent portion where steam is not sprayed and on the left and right above the side surface opposite the steam vent portion, the wide seal portion is used so as not to tilt the container. You can grab it. Therefore, there is no risk that the contents will be ejected from the steam venting portion, and the film container can be safely taken out from a heated microwave oven or the like.

It is an example of the film container of the present invention, and is the perspective view which shows the shape before filling the contents. It is an example of the film container of this invention, and is the perspective view which shows the state which the contents are filled and sealed, and then heated in the microwave oven. It is an example of the film container of this invention, and is the perspective view which shows the state which the container was torn and opened from the opening start part of the side surface.

Hereinafter, an example of an embodiment of the film container of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an example of a film container of the present invention, and is a perspective view showing a shape before filling the contents.
The film container is composed of a front film 1, a back film 2 on the back side thereof, and a bottom film 3 folded into the bottom surface.

The front surface film 1 and the back surface film 2 are fused with each other on the left side sealing portion 61 and the right side sealing portion 62.
Further, on the bottom side, there is a bottom film 3 folded in the front and back directions, and the front film 1 and the bottom film 3 are attached to each other, such as the left side seal portion 61, the right side seal portion 62, and the front bottom seal portion 31. It is sealed at the periphery of the surface to form a bottom surface shape.
Similarly, the back surface film 2 and the bottom surface film 3 are sealed to each other by peripheral portions such as the left side surface sealing portion 61, the right side surface sealing portion 62, and the back bottom surface sealing portion 32 to form a bottom surface shape. When the center of the folded bottom film 3 is widened, the front film 1 and the back film 2 near the bottom surface are separated to form the bottom surface 30.

At this time, a part of the bottom film 3 is opened in the left peripheral edge and the right peripheral edge of the bottom film 3, and the lower left fusion portion 610 and the lower right fusion portion 620 in which the front film 1 and the back film 2 are fused to each other. May be provided. The lower left fusion portion 610 and the lower right fusion portion 620 strengthen the waist of the bottom peripheral edge portion, and stable independence can be obtained.

A steam venting portion 5 is provided on either the left or right side of the side sealing portion.
The steam venting portion 5 forms a fused portion protruding inside the film container. Then, the fusion width at the tip thereof is reduced, and the fusion outer edge portion 51 is set to be located inside the inner edge position of the other fusion portions.

Further, the other side surface seal portion which is not provided with the steam vent portion has the opening start portion 7 at a height farther from the bottom surface than the steam vent portion.
If there is an opening line 71 in which a fragile line runs in a line parallel to the bottom surface through the opening start portion 7, it is easier to open the film container more reliably.

In FIG. 1, the space between the left side surface sealing portion 61 and the right side surface sealing portion 62 above the opening line 71 is on the upper surface side and is in a state of being opened without sealing. Normally, the contents are opened from the opening portion 4. After filling the material, the upper surface sealing portion 63 is fused to complete the film container.
At this time, it is necessary to limit the content to an amount that can be filled only on the bottom surface side of the steam venting portion 5.

Further, a lower wide seal portion 622 is formed on the bottom surface side of the steam vent portion 5 of one side seal portion having the steam vent portion 5.
Further, an upper wide seal portion 611 is formed on the upper surface side of the other side seal portion without the steam vent portion 5.
The lower wide seal portion height 623 of the lower wide seal portion 622 is the same height as the lower wide seal portion lower height 613 below the upper wide seal portion 611. As a result, the film of the container can be used without waste.

FIG. 2 is an example of a film container of the present invention, and is a perspective view showing a state in which the contents are filled and sealed and then heated in a microwave oven.
When heated in a microwave oven, the moisture in the contents boils and the pressure inside the film container rises.
When the pressure inside the film container rises, the film container expands into a round, nearly spherical shape.

That is, the peeling of the fused portion that occurs when the film container is heated gradually starts from the inside of the sealing portion that opposes the spherical shape from the center of the container. Therefore, it starts to peel off from the inside of the steam venting portion 5 which is fused in a state of protruding to the center.
In the film container of the present invention, in particular, the fused outer edge portion 51 of the steam venting portion 5 is set to be located inside the inner edge position of the other fused portions, so that the tip of the steam venting portion 5 is located. However, it penetrates the outside of the container first in the container.

In the seal portion on the periphery of the container, the steam venting peeling portion 50 that was peeled off first peels off to the outside of the fusion outer edge portion 51 according to the internal pressure, and the steam venting portion 5 to the steam 8 inside the container, etc. The boiling steam of is ejected.
At this time, since the contents are filled only on the bottom surface side of the steam venting portion 5, if the film container is made independent, only the steam of the contents is ejected and the ejection of liquid or the like can be suppressed.
If the contents come inside the steam venting portion 5, the liquid contents themselves may spurt out and cause burns, so it is necessary to prevent the container from tilting.

Since the wide seal portions of the upper wide seal portion 611 and the lower wide seal portion 622 are separated from the storage portion, even if the film container is heated, the temperature does not rise and it is easy to hold.
Further, since the high-temperature steam flows upward, the upper side seal portion 621 of the steam vent portion 5 becomes hot, but the lower wide seal portion 622 on the steam vent portion side does not become hot.
Therefore, when the heated film container is taken out from the microwave oven, even if the upper wide seal portion 611 and the lower wide seal portion 622 are held, the temperature does not rise so much that the container can be pinched and held by hand.
In particular, there are a lower wide seal portion 611 on the steam vent side, an upper wide seal portion 622 on the opposite side of the steam vent portion, and wide seal portions on the left and right, so if the left and right wide seal portions are grasped and lifted at the same time, It is possible to hold the bottom surface horizontally without tilting the container.
If the steam venting portion 5 is tilted and lowered below the liquid level of the contents in a state where steam is generated by heating, the contents may be ejected at once, but such a situation occurs. Hateful.

When the steam inside the film container is completely released, the air pressure inside becomes the same as the outside air pressure, and the film container deflates. Then, the front film and the back film can be torn and opened by the opening line 71 parallel to the bottom surface with the opening start portion 7 as the base point.

FIG. 3 is a perspective view of a film container in which the opening portion 70 is torn from the opening start portion 7 along the opening line 71 as described above.
The film container of the present invention in which the opening portion 70 is torn has a steam venting portion 5 inside the opening portion 70, but since the inside of the steam venting portion 5 is peeled off, it is large for taking out the contents. It doesn't get in the way.
In particular, since the lower left fusion portion 610 and the lower right fusion portion 620 strengthen the waist of the bottom peripheral edge portion, it is easy to secure stable independence.
Further, since the upper wide seal portion 611 and the lower wide seal portion 622 remain even after opening the package, if the wide seal portions are grasped, the holding hand does not become hot and the contents can be easily taken out.

The front film and the back film used for the film container of the present invention include a base film having at least a certain elasticity and a sealant film having high adhesiveness, and a film that can be torn from the opening start portion is used.
In addition, it must be suitable for retort pouching and can maintain its shape without being melted by heating in a microwave oven. In particular, it is necessary to have rigidity that can maintain an independent state even at high temperatures in a microwave oven.

For example, it is a configuration example of polyethylene terephthalate stretched from the outside, polyethylene, a barrier film, and a sealant layer.
As the barrier film, a stretched polyamide film in which a metal oxide such as silicon oxide or aluminum oxide is metal-deposited can be considered. However, those on which pure metal such as aluminum is deposited or metal foil are not used because they generate heat at high temperatures in a microwave oven.
Polyamide film is used because it is hard to break, has high impact resistance, and can increase flexibility.
As the sealant, linear low-density polyethylene having high fusion strength and heat resistance is preferable.
These films can be produced by laminating them with a normal dry lamination machine, extruder laminating machine, or the like.

In addition, between the left and right opening start parts of the opening part, the base film is partially weakened by scanning a carbon dioxide laser, or the base film is half-cut with a biku blade or the like to make it more straight. It may be easily torn into a shape.
Further, a film having a stronger stretching of the base material in the left-right direction of the film container may be used.

The film used for the bottom film may be composed of a front film or a back film. However, there is no need to emboss or half-cut, so
Biaxially stretched polyethylene terephthalate / polyethylene,
Biaxially stretched polyamide / polyethylene / inorganic oxide vapor-deposited polyethylene terephthalate / polyethylene,
Biaxially stretched polyethylene terephthalate / polyethylene / ethylene vinyl acetate copolymer saponified product / polyethylene,
Biaxially stretched polyethylene terephthalate / polyethylene / adhesive resin / polyamide / adhesive resin / polyethylene,
Biaxially stretched polypropylene / polyamide / adhesive resin // polyethylene,
A general configuration such as is conceivable.
These films can also be produced by laminating them with a normal dry lamination machine, extruder laminating machine, or the like.

The film container of the present invention is as described above, and is left and right of the lower wide seal portion on the bottom side of the steam vent portion on which the steam ejected from the steam vent portion is not applied and the upper wide seal portion on the other upper side. Since it has a wide seal portion, the film container can be taken out from a microwave oven or the like that has been safely heated so as not to tilt.
In addition, since it has an opening on the bottom side that is almost parallel to the bottom, it can be opened wide, and you can eat the cooked contents while it is hot without having to move it to another container. It is an easy-to-use film container.
Further, since it can be manufactured using a conventional manufacturing line, it can be manufactured without particularly incurring equipment costs, and the merit of the present invention is great.

1 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Front film 2 ・ ・ ・ ・ ・ ・ ・ ・ ・ Back film 3 ・ ・ ・ ・ ・ ・ ・ ・ Bottom film 30 ・ ・ ・ ・ ・ ・ ・ ・ Bottom 31 ・ ・ ・Front bottom seal 32 ... Back bottom seal 4 ... Opening 5 ... Steam vent 50 ...・ ・ ・ ・ ・ ・ Steam venting peeling part 51 ・ ・ ・ ・ ・ ・ ・ ・ Fusion outer edge part 61 ・ ・ ・ ・ ・ ・ ・ ・ Left side seal part 610 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Lower left fusion part 611 ・・ ・ ・ ・ ・ ・ Upper wide seal part 613 ・ ・ ・ ・ ・ ・ ・ Upper wide seal part Lower height 62 ・ ・ ・ ・ ・ ・ ・ ・ Right side seal part 620 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Lower right fusion Part 621 ... Upper seal part 622 ... Lower wide seal part 623 ... Lower wide seal part height 63 ... Top seal part 7 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Opening start part 70 ・ ・ ・ ・ ・ ・ ・ ・ Opening part 71 ・ ・ ・ ・ ・ ・ ・ ・ Opening line 8 ・ ・ ・ ・ ・ ・ ・ ・ Steam

Claims (2)

It consists of at least a front film, a back film, and a bottom film that folds into the bottom.
It has a seal on the periphery of the left side, right side and bottom.
In a bag-shaped film container having a steam vent on one of the left and right sides,
It has an opening part above the steam vent and parallel to the bottom surface.
An opening start portion is provided on the periphery of the side seal portion on the opposite side of the steam vent portion of the opening portion.
And possess a vapor release section below the bottom side of one side surface with a vapor release section, the upper side of the other side, a wide seal portion,
In the wide seal portion, the height of the lower wide seal portion on the lower bottom surface side of the steam vent portion on one side having the steam vent portion is the same as the height below the upper wide seal portion on the upper side of the other side surface. film-made container, which is a by. The film according to claim 1, wherein the bottom surface sealing portion has fusion portions on the left and right sides , and the front surface film and the back surface film are fused at the fusion portion. Making container.

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