JPH0826349A - Pouch for microwave oven - Google Patents

Abstract

PURPOSE:To mass-produce a bag body with functions to prevent moisture from evaporating, and air and germs from entering in the processes of filling, storage and circulation of a food, and make steam which is generated from the food pass through at the time of heating by a microwave oven, by utilizing a bag- making machine for stand pack as it is. CONSTITUTION:A nonwoven fabric 12 which is double-folded is sealed 13 at the end edge parts of the nonwoven fabric 12 in a bag body 11 made of a plastic film at a location which is closer to one end of the bag body 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pouch for a microwave oven in which a non-woven fabric is folded and attached inside a sealed bag.

[0002]

2. Description of the Related Art In recent years, with the progress of food processing technology and packaging technology, various kinds of foods have been developed and are widely used, in which foods packaged in pouches are heated in a microwave oven and heated.

By the way, the microwave oven vibrates water molecules and the like contained in food by irradiation of high frequency (ultra-short wave), and heats the food by frictional heat generated by the vibration of the water molecules and the like. With the high frequency heating of the microwave oven, water vapor is generated from the food. As a result, when food is put in a sealed bag made of a simple plastic film and heated in a microwave oven, the sealed bag expands and eventually bursts.

Therefore, conventionally, a pouch for a microwave oven has been developed and proposed in which water vapor generated when a food in a sealed bag is heated at a high frequency is released to the outside of the sealed bag to prevent the pouch from bursting.

FIG. 6 is a plan view of a conventional pouch for a microwave oven provided with a back seal made of non-woven fabric, and FIG. 7 is an enlarged sectional view taken along line BB of FIG.

In the conventional pouch for a microwave oven shown in these drawings, a plastic film 2 is folded and a bag 1 having an empty back is formed between both side edges 2a and 2b of the plastic film 2 with a predetermined width. Is forming.

On the outer sides of the side edges 2a, 2b of the plastic film 2, a strip-shaped nonwoven fabric 3 having a width slightly wider than the space between the side edges 2a, 2b is overlapped. 2b and the side edges 3a and 3b of the non-woven fabric 3 superposed thereon are heat-sealed.

Further, on the outer side of the strip-shaped nonwoven fabric 3,
The seal film 4 is attached. The bottom portion 2c of the bag 1 is also heat-sealed to form a bag having a back seal.

Then, food is filled into the inside of the bag 1 through the opening 2d of the bag 1, and then the opening 2d is heat-sealed to complete a microwave-containing pouch which is a sealed bag containing the food. is there.

In the conventional microwave oven pouches shown in FIGS. 6 and 7, since the seal film 4 is attached to the outside of the nonwoven fabric 3 forming the back seal, during the process of filling, storing and distributing food, It is possible to prevent the problem that the water content of the food escapes from the portion of the non-woven fabric 3 and to prevent the invasion of air, bacteria and the like.

When the bag 1 is put in a microwave oven and heated, the seal film 4 of the non-woven fabric 3 is peeled off and put in the microwave oven. As a result, even if food is heated by high frequency heating and water vapor is generated, the water vapor permeates the non-woven fabric 3 and escapes to the outside of the bag. This makes it possible to eliminate the problem that the bag body 1 expands and bursts due to water vapor.

[0012]

However, in the conventional pouch for microwave oven with a back seal made of non-woven fabric, both side edges 2a, 2b of the plastic film 2 arranged on the back side of the bag body 1 at a predetermined interval. First, it is necessary to heat-seal the strip-shaped nonwoven fabrics 3 with a predetermined width.

Therefore, this pouch for microwave oven cannot be manufactured by a bag making machine which has been generally used, and there is a problem that special equipment such as changing the shape of the seal bar must be added.

The object of the present invention is to solve the above-mentioned problems of the prior art, and to evaporate water during filling, storage and distribution of food.
A microwave oven that can prevent air and bacteria from entering, and can mass-produce a bag body that has the function of transmitting water vapor generated from food when heated by a microwave oven, using the bag making machine for stand packs as it is. Is to provide pouches for use.

Another object of the present invention is to provide a pouch for a microwave oven which is easy to use.

Another object of the present invention is to provide a pouch for a microwave oven which is excellent in workability.

[0017]

The above object can be achieved by the following pouch for a microwave oven of the present invention. That is, in the pouch for a microwave oven of the present invention, a non-woven fabric folded in two is attached inside a sealing bag made of a plastic film in the vicinity of one end thereof by being sealed at the edge of the non-woven fabric.

Further, the pouch for a microwave oven according to the present invention is one in which a notch is provided near the end of the portion of the hermetically sealed bag to which the non-woven fabric is attached, and the hermetically sealed bag is provided with a non-woven fabric in addition to the notch. A notch is provided on at least one of the opposite side of the notch and the other end side of the sealing bag.

Further, in the pouch for a microwave oven of the present invention, the sealed bag is formed by using a laminated film of stretched nylon, a dry laminate layer and a heat resistant linear low density polyethylene in order from the surface layer, and the nonwoven fabric is made of a polyethylene material. It is formed by using.

[0020]

In the pouch for a microwave oven of the present invention, a non-woven fabric folded in two is arranged inside a plastic bag hermetically sealed bag near one end, and the non-woven fabric is sealed at the edge of the non-woven fabric. It is sealed on the inner surface.

Thus, in the microwave oven pouch of the present invention, the plastic film is heat-sealed at the end portion side of the hermetically sealed bag to which the nonwoven fabric is attached. Therefore, the food is filled from the end portion side of the sealed bag where the non-woven fabric is not attached, and the end portion is completely sealed in a heat-sealed state.

Therefore, in the process of filling, storing and distributing the food, it is possible to completely prevent the evaporation of water in the food and the invasion of air and bacteria.

When the packaged food is put in a microwave oven and heated, the end of the hermetically sealed bag to which the non-woven fabric is attached is cut off to open the end of the non-woven fabric, and then the food is microwaved together with the bag. Put in and heat.

As a result, the steam generated from the heated food permeates the non-woven fabric and escapes to the outside, whereby it is possible to completely eliminate the problem that the bag is ruptured by the steam generated from the food.

The microwave oven pouch of the present invention is
Since the two-fold non-woven fabric is heat-sealed at the edge of the non-woven fabric on the inner surface of the sealed bag made of plastic film, it can be manufactured by using the bag making machine for stand packs as it is. Therefore, it can be mass-produced without requiring special equipment, and can be supplied at a low price.

The microwave oven pouch of the present invention has a notch near the end of the portion of the sealed bag to which the non-woven fabric is attached, and in addition to the notch,
At least one of the opposite side of the notch and the other end of the sealing bag is sandwiched with a non-woven fabric, and the part of the sealing bag can be cut off according to these notches to improve the usability. You can

Furthermore, the pouch for microwave oven of the present invention is
The sealed bag is formed using a laminated film of stretched nylon, a dry laminate layer, and a heat-resistant linear low-density polyethylene in order from the surface layer. A polyethylene material is used for the non-woven fabric. Therefore, the laminated film and the polyethylene-based non-woven fabric have a good heat-sealing property, and thus can be efficiently processed by using the stand pack bag making machine. Moreover, since the polyethylene-based nonwoven fabric has a double-sided heat-sealing property, it is advantageous in setting in a bag-making machine.

The pouch for a microwave oven according to the present invention is also provided in a hermetically sealed bag in which the end side of the non-woven fabric is cut off and the end of the non-woven fabric side is not opened to sterilize the contents by boiling or autoclaving. There is also an advantage that processing such as the above can be performed.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete structure of a pouch for a microwave oven according to the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing an embodiment of a pouch for a microwave oven according to the present invention, FIG. 2 is an enlarged sectional view taken along the line AA of FIG. 1, and FIG. 3 shows a plastic film forming a bag body. It is an expanded sectional view which shows a structure.

In the embodiments shown in FIGS. 1 to 3, a non-woven fabric 12 is arranged inside one end portion of a bag body 11 of a sealed bag made of a plastic film, and the non-woven fabric 12 has its edge portion. It is sealed and attached to the bag body 11.

The plastic film, which is the material of the bag 11, has polyethylene terephthalate as a surface base material,
It is preferable to use a material having good printability and heat resistance such as stretched nylon. The material of the bag body 11 may be a single film or a laminated film, but a laminated film is preferable.

The laminated film as the material of the bag 11 is
At least a base material layer and a seal layer. Examples of the base material layer include a stretched nylon film, a stretched polyester film, a stretched polypropylene film, a hard polyvinyl chloride film, a soft polyvinyl chloride film, a polyvinyl alcohol film, a polycarbonate film, and cellophane. Examples of the seal layer include low-density polyethylene film, medium-density polyethylene film, high-density polyethylene film, linear low-density polyethylene film, unstretched polypropylene film, ethylene-vinyl acetate copolymer film and the like.

When it is desired to impart a barrier property to the bag body 11, for example, a film obtained by laminating a barrier film such as a silica vapor deposition film, an alumina vapor deposition film, a magnesium oxide vapor deposition film, a saran film or a transparent VM base film. It is better to use.

The laminated film forming the bag 11 is, for example, stretched nylon film / linear low-density polyethylene film, stretched polyester film / non-stretched polypropylene film, stretched polypropylene film /
Examples include unstretched polypropylene film and stretched nylon / unstretched polypropylene film.

A film obtained by laminating any one of Eval film, silica vapor deposition film, alumina vapor deposition film, magnesium oxide vapor deposition film, saran film, and transparent VM base film in the middle of these two-layer laminate film. By using, the bag body 11 having excellent barrier properties can be obtained.

Further, as the plastic film which is the material of the bag body 11, a film formed by laminating a uniaxially stretched film which is easy to tear in parallel with the end portion where the non-woven fabric 12 is arranged is used, so that the bag body 11 can be easily opened. Can be easy.

The laminated films can be adhered to each other by dry lamination or the like.

The sealing layer of the laminated film has a heat sealing property with the nonwoven fabric 12, but a polyethylene film having a high melting point is preferably used, and a heat resistant linear low density polyethylene film is most suitable.

As the material of the non-woven fabric 12, polypropylene-based or polyethylene-based material having high heat resistance is preferably used, and high density polyethylene is more preferable than low density polyethylene. Specifically, a polyester-based spunbonded nonwoven fabric made of fibers obtained by coating polyester with high-density polyethylene is suitable. Further, as the non-woven fabric 12, a non-woven fabric that is permeable to water vapor but impermeable to bacteria is preferable.

Considering the heat-sealing properties of the bag 11 and the non-woven fabric 12, the materials for the bag 11 and the non-woven fabric 12 are, as shown in FIG. It is preferable to use a laminated film of low-density polyethylene 9 and use polyethylene-based nonwoven fabric as the material of the nonwoven fabric 12.

The non-woven fabric 12 is folded in two and placed inside the bag body 11, and is heat-sealed inside the bag body 11 at the edge of the non-woven fabric 12. Sign 1
3 has shown the heat seal part.

Further, the bag body 11 is heat-sealed at three peripheral edges with the heat-sealing portion 14 except for the opening 15 on the other end side of the bag body 11.

Further, a notch 16 for opening the bag body 11 prior to heating by a microwave oven is provided near the end of the portion where the non-woven fabric 12 is attached in the bag body 11.

The bag 11 is filled with food (not shown) through the opening 15 and then the opening 15 is heat-sealed.

In the pouch for a microwave oven constructed as described above, the bag body 1 is provided with the nonwoven fabric 12 inside.
Since the portion closer to the end of the attachment portion of the non-woven fabric 12 in No. 1 is heat-sealed, the non-woven fabric 12 can be used in the process of storing and distributing the food after the food is filled in the bag body 11.
It is possible to completely eliminate problems such as the evaporation of water from the food from the portion and the entry of air and bacteria.

When the food in the bag 11 is heated in a microwave oven, the notch 16 is provided in the bag 11 near the end of the non-woven fabric 12 mounting part.
The bag body 11 is cut out from the portion to expose the nonwoven fabric 12. Then, the food as it is in the bag 11 is put in the microwave oven and heated by high frequency.

Therefore, during this heating, water vapor generated from the food permeates the nonwoven fabric 12 and escapes to the outside.
It is possible to completely eliminate the problem that the bag body 11 bursts due to water vapor generated from food.

In this embodiment, the non-woven fabric 12 folded in two is heat-sealed at the edge of the non-woven fabric 12 on the inner surface of the bag body 11 which is a sealed bag made of a plastic film. The sealed bag having the structure can be manufactured by using a commonly used stand pack bag making machine as it is.

Next, FIG. 4 is a cross-sectional view of the essential parts showing another embodiment of the pouch for a microwave oven according to the present invention.

In the embodiment shown in FIG. 4, as can be seen from the comparison with FIG. 2, the non-woven fabric 12 is attached in the opposite direction. The other structure is the same as that of the embodiment shown in FIGS. 1 and 2, and the operation is also the same.

Next, FIG. 5 is a plan view showing another embodiment of the present invention.

In the embodiment shown in FIG. 5, the bag 11 is opened at the position opposite to the notch 16 with the nonwoven fabric 12 sandwiched between it and the opening 15 side of the bag 11 when the heated food is taken out. Notches 17 and 18 are provided respectively for cutting.

In this embodiment, the food together with the bag is heated in a microwave oven, taken out from the microwave, and then the bag 11 can be opened from at least one of the notches 17 and 18 to take out the food. The food can be easily taken out from the bag body 11.

In the embodiment shown in FIG. 5,
The notches 17 and 18 may be either one.

Example 1 As a material for the bag body 11 of the hermetically sealed bag, a biaxially stretched nylon film (15 μm) which is back-printed in order from the surface layer is printed.
/ Dry laminate layer / using a laminated film consisting of heat-resistant linear low-density polyethylene film (50 μm),
Further, as the non-woven fabric 12, a polyester-based spun-bonded non-woven fabric made of fibers obtained by coating polyester with high density polyethylene was used to obtain a pouch for a microwave oven having an opening 15 of a bag.

After the contents of pilaf, fried chicken, meat bun, frozen pumpkin, and shumai were contained in the microwave pouch, the opening 15 was heat-sealed and hermetically sealed.

Subsequently, the end side of the sealed bag on which the non-woven fabric is attached is cut out from the notch 16 provided in the portion of the bag body 11 near the end of the attached part of the non-woven fabric, thereby forming the non-woven fabric side. After exposing the non-woven fabric 12 by opening the end of the above, the pouch was heated for 5 minutes and 10 minutes with a microwave oven of 600 W. Both pouches had neither a bag breakage nor an inner surface fusion. Also, the escape of water vapor was complete.

[0059]

As described above, according to the pouch for a microwave oven of the present invention as set forth in claim 1, a non-woven fabric folded in two is provided inside the plastic sealing bag near one end thereof. Is sealed and attached, and food is filled from the end portion side where the non-woven fabric is not attached in the sealed bag, and the end portion is heat-sealed and completely sealed.

Therefore, in the process of filling, storing and distributing the food, there is an effect that it is possible to completely prevent the evaporation of water in the food, the invasion of air and bacteria, and when the packed food is heated in the microwave oven. The end of the hermetically sealed bag to which the non-woven fabric is attached is cut off, the end of the non-woven fabric is opened to expose the non-woven fabric, and then the food is put in a microwave oven together with the bag and heated.

Therefore, the steam generated from the heated food permeates the non-woven fabric and escapes to the outside, which has the effect of completely eliminating the problem of the bag bursting due to the steam generated from the food. In addition, since the edges of the folded non-woven fabric are heat-sealed to the inner surface of the plastic film sealed bag, it can be manufactured using the stand pack bag making machine without any special equipment. It can be mass-produced without doing so, and can be offered at a low price.

Further, according to the pouch for a microwave oven of the invention described in claim 2, a notch is provided further toward the end of the portion of the sealed bag to which the nonwoven fabric is attached, and the electronic device of the invention according to claim 3 is further provided. According to the microwave pouch, in addition to the notches, the notch is provided on at least one of the opposite side of the notch and the other end of the sealing bag by sandwiching the non-woven fabric. Since the part can be cut off and used, there is an effect that the usability can be improved.

Further, according to the invention described in claim 4, the hermetically sealed bag is formed by using a laminated film of stretched nylon, a dry laminate layer and a heat-resistant linear low-density polyethylene in order from the surface layer, and a nonwoven fabric is used. Since the polyethylene-based material is used, the laminated film and the polyethylene-based non-woven fabric have a good heat-sealing property, and therefore, there is an effect that they can be efficiently processed using the stand-pack bag-making machine. Since it has a double-sided heat-sealing property, it is advantageous when it is set in a bag-making machine.

Furthermore, in the microwave oven pouch of the present invention, an oxygen scavenger is enclosed inside the pouch.
The storability of contents at room temperature can be improved.

[Brief description of drawings]

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

2 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 3 is an enlarged cross-sectional view showing an example of a plastic film forming a bag body.

FIG. 4 is an enlarged cross-sectional view of a main part showing another embodiment of the microwave oven pouch of the present invention.

FIG. 5 is a plan view showing another embodiment of the microwave oven pouch of the present invention.

FIG. 6 is a plan view showing a conventional microwave oven pouch having a back seal made of a non-woven fabric.

7 is an enlarged cross-sectional view taken along the line BB of FIG.

[Explanation of symbols]

 11 ... Bag 12 ... Non-woven fabric 13,14 ... Heat seal part 15 ... Bag opening 16 ... Notch 17,18 ... Notch for opening when taking out heated food

Claims (4)

[Claims] 1. A pouch for a microwave oven, characterized in that a non-woven fabric folded in two is sealed inside an end portion of a plastic film sealing bag at the edge of the non-woven fabric. 2. The pouch for a microwave oven according to claim 1, wherein a notch is provided further near the end of the portion of the sealed bag to which the nonwoven fabric is attached. 3. The sealing bag, in addition to the notch, is provided with a notch on at least one of the opposite side of the notch with a non-woven fabric sandwiched between the notch and the other end side of the sealing bag. The pouch for a microwave oven according to claim 2. 4. The hermetically sealed bag is formed by using a laminated film of stretched nylon, a dry laminate layer, and a heat-resistant linear low-density polyethylene in order from the surface layer, and the non-woven fabric is formed of a polyethylene material. The pouch for a microwave oven according to claim 1, wherein the pouch is a microwave oven.