JPH09240754A - Bag for cooking-heating by microwave oven - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a bag from being damaged due to steam to be generated at the time of heating in a microwave oven, improve feeling of food, and prevent sweating of moisture in foods and freeze-drying, by connecting a top side and right and left sides of a ventilative non-woven fabric positioned ranging the whole length of top sides of up and down sides of top and rear face films or ranging the whole length of the up and down sides to the top and rear face films by fusing. SOLUTION: At a top side of a top face film 1 whose up and down lengths are to be set shorter than that of a rear face film 2 of the top and rear face films 1 and 2 formed of a synthetic resin film which is non-ventilative and whose inside face can be fused, a bottom side of a plane ventilative non-woven fabric 3 is connected by fusion to the inside face of the top face film 1. Also, the right and left sides of the non-woven fabric 3 are connected by fusion to the right and left sides of the rear face film 2. For the non-woven fabric, a non-woven fabric made of a synthetic resin is suitable, and olefin, polyethylene, and polypropylene non-woven fabric can be selected. As it is put on a food filling line in a bag making state, one side of a bag is left unconnected. After the bag is filled with the food, the one side is connected by fusion so as to complete a product.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging bag for food that is cooked and heated in a microwave oven, and in particular, even if the bag is placed in a microwave oven and cooked and heated, it does not break due to water vapor or the like. In addition, the present invention provides a bag which improves the cooking condition of food and can be easily manufactured by a normal manufacturing process.

[0002]

2. Description of the Related Art Conventionally, bags for heating and heating microwave ovens have been
The biggest problem is that the bag is inflated and broken due to steam generated from food during cooking and heating. In addition, depending on the food, there is also a problem that the vapor condenses in the bag and water droplets splash on the food, thereby impairing the texture. As a means for solving these problems, a structure in which a breathable non-woven fabric is provided in a part of the bag has been proposed.
A non-woven fabric is provided on the back seal portion of the bag as in 15198,
It is proposed that steam in the bag is discharged from the nonwoven fabric to the outside to solve the above problem. However, this structure can achieve satisfactory effects in terms of preventing bag breakage and improving texture, but since the nonwoven fabric is in the center of the bag, the food inside is always in contact with the nonwoven fabric, and the moisture content of the food is non-woven. There was a risk that it would leak out of the bag through the. Further, in frozen foods, there is a possibility that air may circulate with the outside and freeze-drying may occur. Furthermore, it is necessary to take a vertical bag manufacturing process for manufacturing the bag, and it is difficult to bond the nonwoven fabric and the film in such a manufacturing process, and a special device is required. There was a problem that the cost of the

[0003]

DISCLOSURE OF THE INVENTION The present invention aims at releasing steam generated during heating in a microwave oven to the outside of a bag by using a breathable non-woven fabric, preventing the bag from breaking and improving the texture of food. In addition to solving the problem, by providing a non-woven fabric on the side of the bag that is the most difficult to contact with food in the bag, it prevents water from seeping out of the food, freezes and freezes the frozen food, and prevents the normal bag-making process. We present a microwave oven heating and heating bag that is easy to manufacture, highly practical, and cost effective.

[0004]

In order to achieve the above object in the present invention, first, in the first invention, a surface film of a bag having a non-breathable synthetic resin front and back film is placed above and below the back film. The length is short, and the planar breathable non-woven fabric is located between the upper and lower entire lengths of the upper and lower sides of the front and back film, or between the upper and lower sides of the non-woven fabric, and the upper and left and right sides of the non-woven fabric are the back film and the upper side is the front film. Each is a bag for heating and heating a microwave oven, which is characterized by being heat fusion bonded.

In the second invention, the surface film of the self-standing bag having the non-breathable synthetic resin front and back surfaces and the bottom film in the folded state is shorter in vertical length than the back film, and the front and back films are A microwave oven for cooking and heating, characterized in that a plane breathable non-woven fabric is located between the entire length of the upper side, and the upper and left and right sides of the non-woven fabric are heat-sealed to the back film and the lower side to the front film. It is a bag.

Furthermore, in the third invention, a bag having a non-breathable synthetic resin front and back film is breathable in a folded state between the upper and lower sides of the upper and lower sides of the front and back film or between the upper and lower sides. A bag for heating and heating a microwave oven, characterized in that a non-woven fabric is located, and three sides of the non-woven fabric excluding the broken line portions are close to each other by heat fusion bonding to the front and back films.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. 1 and 2 show a first embodiment of the present invention, and FIG. 2 is a sectional view of a state in which a food 5 is stored. A front film 1 and a back film 2 which are non-breathable and whose inner surface is a heat-fusible synthetic resin film are joined by heat-sealing the left and right sides and the lower side. The top-bottom length of the front surface film 1 is set shorter than that of the back surface film 2. Then, a planar breathable nonwoven fabric 3 is bonded to the upper side of the surface film 1, and the lower side of the nonwoven fabric 3 is heat fusion bonded to the inner surface of the surface film. The left and right sides of the non-woven fabric 3 are heat fusion bonded to the left and right sides of the back film 2. In the present invention, the bag is subjected to a food filling run in a bag-making state. Therefore, one side of the bag is left unjoined, and after filling the food, one side thereof is heat-sealed to complete the bag. In this embodiment, it is preferable that the heat-bonding joints on the lower sides of the front and back films of the bag are not bonded, but the heat-bonding joints between the upper surface of the back film and the non-woven fabric may be unbonded.

As the usable synthetic resin film, all layer constitutions used in a usual food bag can be selected. For example, if frozen food is the target content, Ny / C
PP, Ny / PE, etc. can be used. Further, as the non-woven fabric, a synthetic resin-based one is preferable, and for example, an olefin type, further a polyethylene type, a high density polyethylene type,
Polypropylene-based non-woven fabric can be selected. Here, the reason why the synthetic resin non-woven fabric is suitable for the present invention is that the strength of the paper is reduced by steam and there is a defect such as tearing by impact such as dropping, and the synthetic resin non-woven fabric is This is because there is no problem. As a product example, the product name “Tyvek” of Japan DuPont Limited can be used.

In this embodiment, the four-side sealed bag having the two front and back films as separate bodies has been described, but the front and back film may be a three-side sealed bag in which one film is folded and folded. Further, although the nonwoven fabric is provided only on the upper side in this embodiment, it can be provided on the lower side. In this case, the bag takes the form of a four-way seal. Furthermore, although the lower side of the nonwoven fabric is bonded to the inner surface of the surface film in this embodiment, the lower side can be bonded to the outer surface of the surface film. In this case, it is necessary to provide the heat-fusible resin layer also on the outer surface of the surface film. Although the present embodiment has been described with the directions shown in the drawings as up, down, left and right for convenience of description, it goes without saying that the left and right sides can be used upside down. Further, in the present embodiment, the bag shape is vertically long, but it is naturally possible to make it horizontally long.

In the manufacturing method of this embodiment, a long non-woven fabric is made to flow on the side in the flow direction of two long films on the front and back on the bag-making machine or a long film which is formed by folding and folding the front and back. Are melted by heating with a heat-sealing jig, joined, and cut into each bag unit to complete.

FIGS. 3 and 4 show a second embodiment of the present invention, and FIG. 4 is a sectional view showing a state in which the food 5 is stored. First
In addition to the structure of the embodiment, a self-standing bag is provided with a bottom film 4 folded in two at the bottom. In the structure of this embodiment, the food can be cooked and heated in a microwave oven in a self-supporting state, and since the nonwoven fabric is always located on the upper part of the bag, the possibility that food comes into contact with the nonwoven fabric is further reduced. As a bag-making state before filling food in this example, it is preferable to leave the heat-sealed joint between the upper side of the back film and the non-woven fabric unsealed. It is also possible to leave the heat-sealed joint portion of the side unjoined.

The manufacturing method of this embodiment can be manufactured by simultaneously carrying out the manufacturing process of a normal self-standing bag in addition to the manufacturing method of the first embodiment. That is, the long nonwoven fabric and the long bottom film flow in parallel between the long front and back films.

FIGS. 5 and 6 show a third embodiment of the present invention, and FIG. 6 is a sectional view showing a state in which the food 5 is stored. The left and right sides of the front and back films 11 and 12 are heat-sealed together, and the breathable nonwoven fabrics 13 and 14 in a folded state are positioned between the upper and lower sides of the front and back films, respectively, and the front and back of the nonwoven fabrics 13 and 14 are positioned. The side and the front side of the left side fold line are heat-bonded to the inner surface of the front surface film 11, and the rear side and the left and right sides of the back side are butt-bonded to the back film 12, respectively. As a bag-making state before food filling in this example, it is preferable to leave the heat-bonding joints on the left and right sides of the front and back films unbonded, but the heat-bonding joints with the nonwoven fabrics on the upper and lower sides are unbonded. You can also leave it.

In this embodiment, the non-woven fabric is provided on the upper and lower sides of the bag. However, only one of them may be provided. Further, in the present embodiment, for convenience of description, the directions shown in the drawings are described as up, down, left and right, but it goes without saying that the bags can be used in a state in which the bags are turned upside down, and in particular, when the bag is used in a self-supporting form, It is preferable to use the non-woven fabric in the form of being located on the left and right sides of the bag. This is to avoid contact between food and nonwoven fabric as much as possible. Further, in the present embodiment, the bag shape is vertically long, but it is naturally possible to make it horizontally long.

In the manufacturing method of this embodiment, two long non-woven fabrics are flown in parallel on both sides in the flow direction of two front and back long films on a bag-making machine to heat-fix the set points of the present invention. It is completed by heating and melting with a tool, joining, and cutting into individual bag units.

The food to which the present invention is applied may be room temperature, chilled food, frozen food, and may be solid, powder, viscous substance, or liquid. More specific food names include shumai, gyoza, rice, croquette, fish,
You can list vegetables, pizza, pasta, bread, meat, etc.

[0017]

As described above, the present invention has the following effects. That is, since a non-breathable front and back film is provided with a breathable non-woven fabric, steam generated from the food is released to the outside of the bag through this non-woven fabric even when the food is put in a microwave oven and cooked as it is, The bag will not be broken, and the inner surface of the bag will not be condensed unnecessarily to deteriorate the texture of the food. In addition, the moisture in the bag does not blow out of the bag. Furthermore, since the non-woven fabric is provided on the side of the bag, it is possible to prevent contact between the food and the non-woven fabric as much as possible,
As a result, the moisture contained in the food does not inadvertently leak out of the bag through the non-woven fabric at the time of distribution and sale before cooking and heating, and the non-woven fabric does not become dirty and does not damage the appearance, and the non-woven fabric absorbs moisture. That the food becomes dry,
This is effective in preventing frozen food from being freeze-dried due to the circulation of air through the nonwoven fabric.

According to the second aspect of the invention, since the bag has a self-supporting form, the food is stored in the bottom direction of the bag, and the possibility of contact between the food and the non-woven fabric can be further reduced. There is.

Furthermore, according to the third invention, since the nonwoven fabric is folded in two, in addition to the effect of the first invention, the storage volume of the bag can be made larger, and the bag is self-supporting. There is also an effect that it is possible to have.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing the same embodiment of the present invention.

FIG. 3 is a plan view showing a second embodiment of the present invention.

FIG. 4 is a cross-sectional view showing the same embodiment of the present invention.

FIG. 5 is a plan view showing a third embodiment of the present invention.

FIG. 6 is a sectional view showing a third embodiment of the present invention.

[Explanation of symbols]

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Claims (3)

[Claims] 1. A bag having a non-breathable synthetic resin front and back film, wherein the front surface film has a shorter vertical length than the back surface film, and has a planar shape between the upper and lower entire lengths of the upper and lower sides of the front and back film. A bag for heating and heating a microwave oven, wherein a breathable non-woven fabric is located, and the upper side and the left and right sides of the non-woven fabric are bonded to the back film and the upper side is bonded to the front film by heat fusion. 2. A self-standing bag having a non-breathable synthetic resin front and back surfaces and a bottom film in a folded state, the front film having a vertical length shorter than that of the rear film, and having a planar shape between the upper sides of the front and back films. A bag for heating and heating a microwave oven, in which a breathable nonwoven fabric is located, and the upper side and the left and right sides of the nonwoven fabric are bonded to the back film and the lower side is bonded to the surface film by heat fusion. 3. A bag having a non-breathable synthetic resin front and back surface film, wherein a breathable non-woven fabric in a folded state is located between the upper and lower sides of the upper and lower sides of the front and back film, or between the upper and lower sides. A heat-sealing bag for microwave oven cooking, characterized in that the front and back films which are close to each other on three sides excluding the fold line are heat-sealed.