JP3047708U - Packaging bag for microwave oven - Google Patents

Abstract

(57) [Summary] (Modifications) [Problem] A packaging bag for a microwave oven that cooks while maintaining a predetermined pressure, and is degassed when the pressure exceeds the predetermined pressure and does not burst. Offer. A wide heat-welded portion is formed by heat-welding two front and rear heat-resistant synthetic resin sheets around an upper portion, and a ventilation portion for internal pressure adjustment is formed at one of right and left corners thereof. The vent portion does not heat-weld while forming a suitably shaped welding boundary line that continuously narrows and guides toward the upper part of one corner from the central portion of the lower welding boundary line of the wide heat welding portion. A portion of the exhaust guide chamber of the unwelded portion which communicates with the inside of the packaging bag is formed between the side peripheral heat-welded portions 2a and 2b near the corner portion, and a predetermined width is formed above the corner of the exhaust guide chamber. A non-heat-welded exhaust port having an opening is formed, and the heat-resistant synthetic resin sheet in this portion is provided with a cut portion indication for forming an opening.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 According to the present invention, when food is stored in a packaging bag, placed in a microwave oven, and then subjected to high-frequency heating, the pressure in the packaging bag is heated and cooked while maintaining a predetermined high pressure, and becomes higher than a predetermined pressure. In such a case, the bag is degassed and an electronic range packaging bag that does not burst accidentally is provided.

[0002]

[Prior art]

 With the spread of microwave ovens in recent years, packaging bags that originally function as food packaging, preservation, and transfer tools have been improved so that packages have cooking functions when heating microwave ovens in various fields. Came to be. For example, a food container in which a water vapor adjusting hole for adjusting the water vapor pressure in the container to a specific range by electronic heating is provided in the container (Japanese Patent Application Laid-Open No. 62-94117), a seal for a bag for storing food and the like. A packaging container (Japanese Patent Laid-Open No. 63-138975) having a weak seal portion which is broken when the pressure in the bag exceeds a predetermined internal pressure, and a hole for releasing vapor in the container. Food package for microwave cooking (Japanese Patent Publication No. Sho 63-307085), which is adhered so as to be closed with a valve sheet, and holes are formed in the wall of a sealed bag that is not air-permeable or water-permeable. A packaging bag closed with a porous chamber member that is not water-permeable (Japanese Patent Laid-Open No. Hei 5-24533). Axial orientation for food packaging that has both high air permeability and tensile strength and can be cooked in an electronic range. Use less film And also an example food containers (JP-A-6-328556) and the like of those used in part.

[0003] In other words, a conventional package having a cooking function when heating a microwave oven is roughly classified into a package in which a ventilation hole is opened as necessary in the package, The material sheet and the like were improved so as to be air permeable and suitable for high-frequency heating, and were devised so that the pressure in the bag could be maintained and adjusted to a high pressure of 2 to 3 atmospheres.

[0004]

[Problems to be solved by the invention]

 Some of the packaging bags for microwave ovens developed in the past have sufficient performance for cooking functions, but all of them are more expensive than those for everyday foods. Not so popular. In other words, the conventional packaging bag for microwave oven cooking did not have both economical efficiency and practicality that could be profitable for distribution. The inventor of the present invention has improved a commonly used packaging bag made of synthetic resin for microwave ovens, and has proposed a packaging bag for microwave ovens having a cooking function without increasing production costs by using conventional manufacturing methods and equipment. It is to be offered.

[0005] The present inventors have studied the requirements for putting the packaging bag containing the food in a microwave oven as it is and heating the food inside by simply performing high-frequency heating. It was found that it was necessary to solve various technical issues. The high frequency heating causes the steam and air to expand, creating a high pressure inside the bag, which prevents the bag from bursting. At the time of high frequency heating, the pressure in the bag is maintained at 2 to 3 atm suitable for food cooking. If the pressure in the bag rises more than that, excess gas is discharged and the pressure reaches the specified pressure. Then, the discharge of gas stops, and the internal pressure in the bag body can be adjusted. Ensure that stored food utensils and liquids do not inadvertently leak. It can be manufactured at low cost using conventional microwave-compatible synthetic resins and general-purpose heat welding equipment.

The present invention solves the above technical problems by forming a ventilation part for adjusting the internal pressure by devising a method of heat welding a synthetic resin compatible with a microwave oven, thereby realizing a practicality having a cooking function and a storage function. It is an object of the present invention to provide a packaging bag for a microwave oven having both economy and efficiency.

In addition, since the packaging bag for a microwave oven of the present invention has a cooking function, the inside of the packaging bag is not only heated and heated to a high temperature and high pressure by high-frequency heating, but also heated to a high temperature from a ventilation portion for adjusting the internal pressure. , So that high-pressure gas is easily ejected. Therefore, there is a risk of inadvertent burns and leakage of the liquid to the outside of the packaging bag when removing or opening the dish. The purpose of the microwave packaging bag of the present invention is to minimize such inconveniences in handling and to comply with the labeling standards required by the Product Liability Act (PL Act). And

[0008]

[Means for Solving the Problems]

 The first device to be registered is a rectangular electronic device that is made into a bag-like shape that can store foods and the like by heat-welding the four front and rear heat-resistant synthetic resin sheets around the upper, lower, left, and right sides. In the packaging bag for a microwave oven, a wide heat-welded portion is formed around the upper part of the packaging bag for a microwave oven by means of heat-sealing two heat-resistant synthetic resin sheets, and one of the right and left corners thereof is formed. An internal pressure adjusting ventilation section is formed in the portion, and the internal pressure adjusting ventilation section is designed to continuously guide the narrow portion toward the upper corner of one corner from the central portion of the lower welding boundary line of the wide heat welding portion. A non-welded part exhaust guide chamber communicating with the inside of the packaging bag body is formed between the peripheral heat-welded part near the corner and the heat-welded part leaving a part that does not heat-weld while forming a welding boundary line of a suitable shape. An opening with a predetermined width is located at the upper corner of the exhaust guidance chamber. A non-heat-welded exhaust port portion is formed, and the heat-resistant synthetic resin sheet at the portion forming the exhaust port portion is marked with a cut portion for forming an opening portion to constitute the exhaust guide chamber. A partition formed by heat welding is formed so as to cover the front of the exhaust port from an intermediate portion of the side peripheral heat welded portion, and an exhaust storage bay that is not heat-welded is formed immediately before reaching the exhaust port. A non-heat-welded exhaust preparation section communicating with the inside of the packaging bag is formed in front of the partition section, and an exhaust inlet port connecting the exhaust storage bay section and the exhaust preparation section is formed in the partition section with the exhaust port. It is arranged so that it does not open in line with the part, and it is cut off according to the indication of the cut part for forming the opening, which is indicated on the ventilation part for adjusting the internal pressure of the packaging bag for microwave oven. Can be opened A microwave packaging bag according to claim.

The first invention is a basic idea of a packaging bag for a microwave oven in which a ventilation portion for adjusting an internal pressure is formed adjacent to a wide heat welding portion by a heat welding means. In particular, the internal pressure adjusting ventilation section has a function of holding the internal pressure in the packaging bag for microwave oven without exhausting it until the internal pressure reaches a predetermined high pressure, and exhausting the packaging bag only when the internal pressure becomes higher than that. At the same time, it has a function to prevent breakage, a function to prevent foodstuffs and liquids contained in the packaging bag from ejecting as much as possible during exhaust, and a function to ensure that the exhaust action always operates at a specified pressure. It is.

[0010] The ventilation section for internal pressure adjustment is to open the exhaust port by cutting in accordance with the indication of the cut portion for forming an opening displayed on the ventilation section for internal pressure adjustment of the packaging bag for a microwave oven. As a result, heat sealing is completely performed unless the cut portion for forming the opening is cut, and there is no hygiene anxiety during distribution.

[0011] The heat-resistant synthetic resin sheet constituting the packaging bag for a microwave oven is made of polypropylene, polyethylene, vinyl chloride, saturated polyester resin, polyvinylidene chloride, polybutadiene, a sheet combining these materials, and the like. It is not particularly limited as long as it is an appropriate heat-resistant synthetic resin sheet.

The inner pressure adjusting ventilation portion is formed by laminating two front and rear heat-resistant synthetic resin sheets and forming a wide heat-welded portion by a heat-sealing means near the center of a lower welding boundary line of the wide heat-welded portion. While forming a welding boundary line of an appropriate shape so as to continuously guide toward the upper corner of one corner from the portion, leaving a portion that is not heat-welded while forming a welding boundary line, between the heat-welded portion near the corner near the corner. An exhaust guide chamber of an unwelded portion that communicates with the inside of the packaging bag, and further based on the exhaust guide chamber, an exhaust port that is not thermally welded, an exhaust storage bay, an exhaust inlet, and an exhaust preparation unit. Are arranged and formed.

[0013] Even when food or the like is stored in the packaging bag body, the inner pressure adjusting ventilation section has two heat-resistant synthetic resin sheets, which are closely attached to each other, and the periphery thereof is heat-sealed. Under atmospheric pressure, there is no degassing or liquid leakage. It is necessary to inflate or open each part such as the exhaust port, the exhaust storage bay, the exhaust inlet, and the exhaust preparation part of the non-heat-welded exhaust guide chamber that constitutes the internal pressure adjusting ventilation part. Strong load pressure is required.

[0014] Furthermore, each part constituting the internal pressure adjusting ventilation section has a structure that does not expand or open unless a larger load pressure is applied. That is, a partition portion formed by heat welding is formed so as to protrude from an intermediate portion of the side peripheral heat welding portion constituting the exhaust guide chamber so as to block the front of the exhaust port portion, and the exhaust guide chamber is divided into two sections. A non-heat-welded exhaust gas storage bay is formed before reaching the air conditioner, and a non-heat-welded exhaust preparation unit communicating with the packaging bag is formed in front of the partition. An exhaust inlet having a predetermined opening width communicating the air storage bay and the exhaust preparation unit is arranged and formed so as not to be linearly aligned with the exhaust outlet.

Accordingly, when the internal pressure increases due to the vaporization of the liquid in the packaging bag or the expansion of the gas due to the high-frequency heating, the exhaust preparation unit communicating with the packaging bag is first inflated, and then the exhaust gas is discharged. The inlet is pushed open to push the high-pressure gas into the exhaust storage bay, and the exhaust storage bay is inflated as the pressure increases.If the internal pressure further increases, the exhaust opening is pushed open to release the gas to the outside of the packaging bag. When the high-pressure gas inside the packaging bag falls below a predetermined pressure, the exhaust port is closed to prevent further discharge, and the packaging bag is held and adjusted so that the pressure inside the packaging bag does not rise further. It is designed to prevent rupture of the body.

A second device to be registered is to design and adjust the width ratio between the predetermined width of the opening of the exhaust port and the predetermined width of the opening of the exhaust port of the internal pressure adjusting vent to thereby improve the inside of the packaging bag. The packaging bag for a microwave oven according to the first invention, wherein the pressure inside the packaging bag at which the gas starts to be discharged can be arbitrarily set.

The second device is a dependent device of the first device. If the material of the heat-resistant synthetic resin sheet constituting the packaging bag for the microwave oven according to the present invention is specified, and the shape and dimensions of the internal pressure adjusting vent are specified, the predetermined width of the opening of the exhaust port and the exhaust inlet can be determined. It has been found that the pressure inside the packaging bag at which the gas inside the packaging bag starts to be discharged can be arbitrarily set according to the width ratio of the predetermined width of the opening of the portion. Therefore, by adjusting the width ratio between the predetermined width of the opening of the exhaust port and the predetermined width of the opening of the exhaust inlet, and specifying the pressure inside the packaging bag when cooking and heating, it is only necessary to select the cooking time by the electronic range. In this way, appropriate cooking and heating can be performed for each dish.

The third device to be registered is a bag-like rectangular shape in which the front, rear, left and right sides of two front and rear heat-resistant synthetic resin sheets are heat-sealed to store food and the like therein. In the electronic range packaging bag of the above, a wide heat-welded portion is formed by heat-sealing the front and rear two heat-resistant synthetic resin sheets around the upper side of the microwave oven packaging bag, and either one of the left and right sides is formed. A packaging bag for a microwave oven, characterized in that a ventilation portion for adjusting the internal pressure is formed in a corner portion, and a gripping portion indication is provided in a corner portion forming the other wide heat welding portion.

The third invention is a packaging bag for a microwave oven, which is provided with an indication of a gripping position corresponding to the Product Liability Act (PL Act). In other words, a wide heat-welded part that does not become hot even when subjected to high-frequency heating is formed around the upper part of the packaging bag for microwave ovens, and the corners are marked with gripping points. Can hold the correct posture, touch the internal pressure adjustment vent where hot gas is spraying out, burn it, or lift the internal pressure adjustment vent downward to remove the stored liquid. Inconveniences such as inadvertent leakage can be prevented. It should be noted that the display of the grip portion may be a character display, but a pictorial display is more preferable because it is easy for anyone to understand.

A fourth invention to be registered is a bag-shaped rectangular microwave oven packaging bag in which the front and rear three sides of the two heat-resistant synthetic resin sheets are welded by heat and the lower periphery is opened. A heat-sealable synthetic resin sheet formed by heat-sealing the front and rear two heat-resistant synthetic resin sheets around the upper part of the packaging bag body for microwave oven, and at one of the right and left corners thereof. An internal pressure adjusting ventilation section is formed, and the internal pressure adjusting ventilation section is appropriately formed so as to continuously narrow down from the portion near the center of the lower welding boundary line of the wide heat welding section toward the upper corner of one corner. A non-heat-welded portion is formed while forming a shape-welding boundary line, and an exhaust-induction chamber for an unwelded portion communicating with the inside of the packaging bag is formed between the heat-welded portion and the side peripheral portion near the corner. In the upper part of the corner of the exhaust guide chamber, an opening with a predetermined width A non-heat-welded exhaust port having a shape that can be formed is formed, and the heat-resistant synthetic resin sheet corresponding to the portion forming the exhaust port is provided with a cut-out indication for forming an opening to form the exhaust guide chamber. A partition part formed by heat welding is formed so as to cover the front of the exhaust port from the middle part of the side peripheral heat-welded part, and the exhaust guide chamber is divided into two sections, which are heat-welded before reaching the exhaust port. A non-heat-welded exhaust preparation section communicating with the inside of the packaging bag is formed in front of the partition section, and an exhaust storage bay section and an exhaust preparation section are formed in the partition section. An exhaust inflow port communicating with the exhaust port is disposed so as not to be opened in line with the exhaust port, and a cut portion for forming an opening is displayed on an internal pressure adjusting ventilation section of a packaging bag for a microwave oven. The exhaust port can be opened by cutting according to An unsealed microwave packaging bag characterized by providing a weldable portion that can be sealed by heat welding on the lower periphery of the rectangular microwave packaging bag that is open. It is.

The fourth invention is an unsealed microwave packaging bag. In other words, it is a bag-shaped one whose lower periphery is open, and is still in a state before storing foods and the like. Generally, packaging bags for microwave ovens for business use are delivered in such an unsealed state, where food and the like are stored, and the lower peripheral weldable portion is hermetically sealed by heat welding. The finished packaged food can be completed.

As described above, when storing food or the like in the unsealed microwave packaging bag according to the fourth invention, the storage operation is performed with the lower peripheral opening facing upward. The exhaust port is formed so as to cover the front of the exhaust port, forming an exhaust storage bay that is not heat-welded just before reaching the exhaust port. Does not enter the exhaust storage bay or block the exhaust port. In other words, even when a large number of foods are stored in packaging bags for business use by machines, etc., there will not always be a situation that hinders the exhaust performance of the internal pressure adjusting ventilation section, so the performance as designed is ensured. Can demonstrate.

In a fifth aspect of the present invention, the two heat-resistant synthetic resin sheets are heat-welded at the upper, left, and right sides thereof, the lower periphery is opened, and the heat-sealing means is formed under the opening. A microwave-sealed packaging bag body provided with a weldable portion that can be sealed by heat welding, wherein two front and rear heat-resistant synthetic resin sheets are heat-sealed around the upper portion of the microwave packaging bag body. An unsealed microwave oven characterized by forming a wide heat-welded part, forming an internal pressure adjusting vent at one of the left and right corners, and indicating the gripping point at the other corner. It is a packaging bag body for. The fifth invention is a packaging bag for an unsealed microwave oven, which is provided with a gripping portion indication.

[0024]

【Example】

 Hereinafter, the present invention will be described in detail based on embodiments. FIG. 1 is a perspective view showing the packaging bag for a microwave oven according to the present invention, and FIG. 2 is a perspective view showing the packaging bag for an unsealed microwave oven according to the present invention. FIG. 3 is a front view of a main part showing an example of a wide heat welding portion, an internal pressure adjusting ventilation portion, and a gripping position display formed on the upper periphery of the electronic range packaging bag, and FIG. FIG. 8 is a front view of a main part showing another embodiment of a wide heat welding portion, an internal pressure adjusting ventilation portion, and indication of a gripping location formed on the upper periphery of the packaging bag body. FIG. 5 is a perspective view showing a state in which foods and the like are to be stored in the unsealed microwave packaging bag according to the present invention, and FIG. 6 shows a state in which the microwave packaging bag according to the present invention is used. FIG. 6 is a front view showing an example in which a handling procedure when cooking and heating with a microwave is displayed.

The packaging bag 1 for a microwave oven according to the present invention shown in FIG. 1 is formed by heat welding 2a, 2b, and 2c around the four sides of the front and rear two heat-resistant synthetic resin sheets so that the food is contained therein. Is a bag-like rectangular packaging bag body capable of storing therein, etc., and two heat-resistant synthetic resin sheets at the front and rear of the packaging bag body 1 for microwave oven are heat-sealed by a wide heat-sealing portion 3 around the upper side of the packaging bag body 1 for microwave oven. In addition, a ventilation part 4 for adjusting the internal pressure is formed at one of the left and right corners, and a gripping position indicator 5 is attached at the corner forming the other wide heat welding part 3. It is a thing.

As shown in FIG. 3, the basic configuration of the internal pressure adjusting ventilation section 4 is to form an exhaust induction chamber 6 except for a portion that is not heat-welded to the wide heat welding section 3 in the upper periphery. 6 and the exhaust port 7 is formed by specifying the shape of the portion that is not thermally welded, and a partition 8 is provided by thermal welding to form the exhaust storage bay 9, the exhaust preparation section 10, and the exhaust flow. An inlet 11 is formed. Moreover, it is characterized in that the respective parts constituting the internal pressure adjusting ventilation section 4 are formed easily and inexpensively by means of heat welding.

The exhaust guide chamber 6 of the internal pressure adjusting ventilation section 4 has an appropriate shape so as to continuously narrow down and guide toward the upper part of one corner at a position near the center of the lower welding boundary of the wide heat welding section 3. While forming a welding boundary line 4a, leaving a non-heat-welded portion, and forming an unwelded portion formed between this and the side peripheral heat-welded portion 2a near the corner. Here, to form the welding boundary line 4a having an appropriate shape so that the welding boundary line 4a is guided toward the upper part of the corner may be formed, for example, by forming the welding boundary line 4a in a gentle step shape as shown in FIG. As shown in FIG. 4, the welding boundary line 4a is formed in a gentle curve. That is, the welding boundary 4a is limited to the shape shown in the illustrated embodiment as long as the pressurized gas in the packaging bag body 1 is guided toward the upper corner along the welding boundary 4a. No need to be done.

The exhaust port 7 is formed by forming a non-heat-welded portion having an opening having a predetermined width at an upper corner of the exhaust guide chamber 6 based on the exhaust guide chamber 6. Although the tip of the exhaust port 7 is initially sealed by heat welding at the upper periphery, a cut-out indication 12 for forming an opening is provided on the surface of the heat-resistant synthetic resin sheet where the exhaust port 7 is formed. It is. Therefore, when using the packaging bag body 1 for a microwave oven according to the present invention, it is necessary to cut off with a blade such as scissors before putting the microwave oven, so that the opening of the exhaust port 7 is opened. As a result, a cooking and heating function is provided, and a complete hermetic seal is maintained without cutting, so there is no need to worry about hygiene during distribution.

Next, the partition portion 8 is formed by projecting the partition portion 8 by heat welding from an intermediate portion of the side peripheral heat welding portion 2 a constituting the exhaust guide chamber 6 so as to close the front of the exhaust port portion 7. The exhaust guide chamber 6 is divided into two parts: an exhaust storage bay part 9 that is not heat-welded before reaching the exhaust port part 7, and a non-heat-welded exhaust preparation part 10 that communicates with the inside of the packaging bag 1. . Further, the partition 8 is provided with an exhaust inlet 11 communicating the exhaust storage bay 9 and the exhaust preparation unit 10 so as not to be opened in line with the exhaust port 7.

The reason why the exhaust port 6 and the exhaust inlet 11 in the exhaust guide chamber 6 of the internal pressure adjusting ventilation section 3 do not communicate with each other in a straight line is that a load is applied to the exhaust inlet 11. The gas pressure inside the packaging bag body 1 is attenuated by the width of the exhaust port 7, and is then attenuated by expanding the exhaust guide chamber while the exhaust gas is diverted, and further attenuated by the width of the exhaust port 7. Is a load for opening the exhaust port 7, and starts discharging the packaging bag 1 without breaking it. That is, if the pressure in the packaging bag 1 does not become higher than a predetermined value, the exhaust port 7 is opened so that the exhaust is not performed.

In particular, in order to arbitrarily set the pressure at which gas in the packaging bag 1 starts to be discharged, the width ratio between the predetermined width of the opening of the exhaust port 7 and the predetermined width of the opening of the exhaust port is calculated. It is designed to be formed by heat welding. In the case of the embodiment, by adjusting the width ratio of the predetermined width of the narrow opening of the exhaust port 7 and the predetermined width of the wide opening of the exhaust inlet 11, the air pressure in the packaging bag body 1 becomes 1.5 to It could be adjusted to 3.0 atm.

The packaging bag for a microwave oven according to the present invention is one in which food is stored in the packaging bag 1 and completely sealed. On the other hand, the packaging bag 1 for an unsealed microwave oven shown in FIG. 2 is the one before storing foods A etc. in the packaging bag 1, and the lower periphery is opened 12 and still heat-sealed. It is not in the state. That is, the unsealed microwave oven packaging bag body is a bag-shaped rectangular shape in which the front and rear three sides of the two front and rear heat-resistant synthetic resin sheets are heat-welded and the lower periphery of 2a, 2b and 3 is opened. A packaging bag for a microwave oven, in which a wide heat welding portion 3 and a ventilation portion 4 for internal pressure adjustment are formed around the upper portion of the packaging bag for a microwave oven, Thus, a weldable portion 13 that can be sealed is provided.

The unsealed microwave packaging bag 1 is delivered to a packaged food manufacturer, and the food manufacturer reverses the unsealed microwave packaging bag as shown in FIG. Orientation is made so that the opening 12 is turned upward, food is put in, and the lower peripheral weldable portion 13 is heat-sealed with a heat-sealing device. At this time, even if a liquid or powder such as broth is put in as food or the like, the partitioning portion 8 constituting the internal pressure adjusting ventilation section 4 is formed so as to protrude so as to block the front of the exhaust port section 7. Unless a pressure exceeding a predetermined level is applied, the gas does not enter the exhaust storage bay 9, so that the food or the like A is stored in the packaging bag and the exhaust port 7 is inadvertently clogged or the internal pressure is adjusted. A defective product that impairs the conditioning and heating function of the ventilation section 4 is not produced. In other words, even in the case where a large amount of foods A are stored and welded by the work of unskilled workers or mechanical work at the factory for business use, the cooking and heating machine in which the packaging bag for a microwave oven according to the present invention is intended is intended. Products that maintain performance can be reliably manufactured.

As shown in FIG. 6, it is desirable to clearly indicate, on the packaging bag for a microwave oven according to the present invention, an indication of a handling procedure when cooking and heating the bag in a microwave oven. For example, the display is as follows. Before using the microwave oven, cut it with scissors to open the exhaust port 7 of the internal pressure adjusting vent 4 so that the cooking and heating function can be exhibited. To be able to take out safely in the correct position by holding after the range. After cooking, cut the cut so that the contents can be opened. This is because it is possible for consumers to easily and surely perform cooking and heating with an appropriate microwave oven as planned, and the utility will be high.

[0035]

【effect】

 A common feature of the present invention is a rectangular packaging bag for a microwave oven which is formed into a bag-like shape capable of storing foods or the like by heat-welding the four front and rear heat-resistant synthetic resin sheets around the four sides of the upper, lower, left and right sides. A heat-sealing means is used to form a wide heat-welded portion of the front and rear two heat-resistant synthetic resin sheets around the upper part of the packaging bag for the microwave oven, and an internal pressure is applied to one of the left and right corners. It is a packaging bag for a microwave oven having a ventilation part for adjustment. In particular, the ventilation section for adjusting the internal pressure for providing the function of cooking and heating in a microwave oven can be easily and simply formed by simply heat-sealing the heat-sealing means, which is a general-purpose technique. Therefore, its manufacturing cost is low and it is almost the same as other food packaging bags, so that it is profitable and practical. In other words, by devising the structure of the ventilation section for adjusting the internal pressure, the pressure inside the packaging bag can be maintained at a predetermined pressure suitable for cooking and heating. If the pressure inside the packaging bag becomes too high, excess pressure is applied. The feature is that it is degassed and adjusted so that the packaging bag does not burst accidentally.

In the second invention, the width of the predetermined width of the opening of the exhaust port and the predetermined width of the opening of the exhaust inlet port of the internal pressure adjusting ventilation section are simply adjusted at the time of designing, so that the packaging bag when heating the microwave oven can be used. Since the pressure can be set arbitrarily, proper cooking heating can be performed for each dish.

The packaging bag for a microwave oven according to the third invention has a rectangular shape in which two heat-resistant synthetic resin sheets (front and rear) are heat-sealed around the four sides of the upper, lower, left and right sides so that food and the like can be stored therein. In the microwave oven packaging bag, the gripping portion indication is attached to the corners constituting the wide heat-welded portion, so if the user grips the portion according to the gripping location indication, it will be correct. Posture can be maintained, burns can be caused by touching the internal pressure adjusting vent that emits hot gas, and the stored liquid can be inadvertently leaked by lifting the internal pressure adjusting vent downward. Inconvenience can be prevented beforehand.

A fourth invention is an unsealed microwave packaging bag body which is heat-welded on three sides and has a lower periphery opened, and a wide heat is applied to the upper periphery of the microwave packaging bag body by heat welding means. Since the welded part was formed and the ventilation part for internal pressure adjustment was formed at one of the right and left corners, the partition part was vented when the storage work was performed with the lower peripheral opening facing upward. Because it is formed so as to protrude so as to close the front of the exhaust port, even if liquids or powders are introduced, they do not intrude into the exhaust storage bay or block the exhaust port, and ventilation for internal pressure adjustment is always performed. A situation that hinders the exhaust performance of the section does not occur.

According to the fifth invention, since the gripping portion indication is provided at the corner of the wide heat-welded portion of the unsealed microwave packaging bag, if the portion is gripped according to the gripping location indication. Can maintain the correct posture, touch the internal pressure adjustment vent that emits hot gas, burn it, or lift the internal pressure adjustment vent downward to inadvertently leak the stored liquid. Inconveniences such as the above can be prevented beforehand.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a packaging bag for a microwave oven according to the present invention.

FIG. 2 is a perspective view of the unsealed microwave packaging bag according to the present invention;

FIG. 3 is a main part front view showing an example of a wide heat welding portion, an internal pressure adjusting ventilation portion, and a gripping position display formed on the upper periphery of a packaging bag for a microwave oven.

FIG. 4 is a main part front view showing another example of a wide heat welding portion, an internal pressure adjusting ventilation portion, and a gripping position indication formed on the upper periphery of a packaging bag for a microwave oven.

FIG. 5 is a perspective view showing a state in which foods and the like are to be stored in an unsealed microwave packaging bag.

FIG. 6 is a packaging bag for a microwave oven according to the present invention, which indicates a handling procedure when cooking by heating in a microwave oven.

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 ... Packaging bag body 2a ... Side peripheral heat welded part 2b ... Side peripheral heat welded part 2c ... Lower peripheral heat welded part 3 ... Wide heat welded part 4 ... Ventilation part for internal pressure adjustment 4a ... Welding boundary line 5 ... Holding position display 6 exhaust exhaust chamber 7 exhaust port 8 partition 9 exhaust storage bay 10 exhaust preparation 11 exhaust exhaust inlet 12 opening 13 weldable part

Claims (5)

[Utility model registration claims] 1. A rectangular microwave oven packaging bag formed by heat welding the front, rear, left, and right sides of two front and rear two heat-resistant synthetic resin sheets into a bag shape capable of storing foods and the like therein. A wide heat-welded portion is formed by heat-sealing two front and rear heat-resistant synthetic resin sheets around the upper side of the packaging bag for a microwave oven, and a vent for internal pressure adjustment is provided at one of the right and left corners. The inner pressure adjusting ventilation section is formed with an appropriately shaped welding boundary line that continuously narrows and guides toward one corner upper portion from a portion near the center of the lower welding boundary line of the wide heat welding portion. A non-welded portion of the exhaust guide chamber communicates with the inside of the packaging bag between the peripheral heat-welded portion near the corner portion and the non-welded portion while forming the portion, and the upper corner portion of the exhaust guide chamber Is not heat-welded so that an opening with a predetermined width is formed The exhaust port portion is formed, and the heat-resistant synthetic resin sheet of the portion forming the exhaust port portion is provided with a cut portion indication for forming an opening portion, and is formed from a middle portion of a side peripheral heat welding portion constituting the exhaust guide chamber. A partition formed by heat welding is formed so as to protrude so as to cover the front of the exhaust port, and the exhaust guide chamber is divided into two sections, and an exhaust storage bay that is not thermally welded is formed before reaching the exhaust port. A non-heat-welded exhaust preparation section communicating with the inside of the packaging bag is formed in front of the partition section, and an exhaust inlet port communicating the exhaust storage bay section and the exhaust preparation section is formed in the partition section. The exhaust opening is opened by arranging and forming it so that it does not open in line with the opening, and cutting it according to the opening forming cut point displayed on the internal pressure adjusting ventilation section of the microwave oven packaging bag. For microwave ovens, characterized in that Sobukurotai. 2. The pressure inside the packaging bag at which the gas inside the packaging bag starts to be discharged by designing and adjusting the width ratio between the predetermined width of the opening of the exhaust port and the predetermined width of the opening of the exhaust inlet of the internal pressure adjusting vent. 2. The packaging bag for a microwave oven according to claim 1, wherein the packaging bag can be set arbitrarily. 3. A rectangular microwave packaging bag for heat-sealing the two front and rear heat-resistant synthetic resin sheets around the upper, lower, left and right sides to form a bag capable of storing foods and the like therein. A wide heat-welded portion is formed by heat-sealing two heat-resistant synthetic resin sheets around the upper part of the packaging bag for the microwave oven, and a vent portion for adjusting the internal pressure is formed at one of the right and left corners. A packaging bag body for a microwave oven, characterized in that a grip portion is displayed at a corner of the other wide heat welding portion. 4. A bag-shaped rectangular microwave packaging bag body which is heat-welded at the upper left and right sides of two front and rear two heat-resistant synthetic resin sheets and has an opening at a lower periphery. A heat-sealing means is used to form a wide heat-welded portion of two front and rear heat-resistant synthetic resin sheets around the upper portion of the packaging bag body, and a vent for internal pressure adjustment is formed at one of the right and left corners. The internal pressure adjusting ventilation section heats while forming an appropriately shaped welding boundary line that continuously narrows and guides toward the upper part of one corner from the center portion of the lower welding boundary line of the wide heat welding section. A non-welded portion is formed, leaving an unwelded portion, and forming a non-welded portion exhaust guide chamber communicating with the packaging bag body between the side peripheral heat weld portion near the corner portion and a predetermined width above the corner of the exhaust guide chamber. Exhaust port that is not heat-welded so that an opening can be formed In addition, the heat-resistant synthetic resin sheet of the portion forming the exhaust port portion is provided with an indication of a cut portion for forming an opening portion, and is heat-welded from an intermediate portion of a side peripheral heat-welded portion constituting the exhaust guide chamber. The partition is formed so as to protrude so as to close the front of the exhaust port, and the exhaust guide chamber is divided into two,
A non-heat-welded exhaust storage bay is formed before reaching the exhaust port, and a non-heat-welded exhaust preparation unit communicating with the inside of the packaging bag is formed before the partition. An exhaust inlet port communicating the exhaust storage bay section and the exhaust preparation section is formed so as not to be opened in line with the exhaust port section, and is provided in the ventilation section for adjusting the internal pressure of the packaging bag body for the microwave oven. The exhaust port can be opened by cutting in accordance with the displayed indication of the cut portion for forming the opening, and hermetically sealed by heat welding around the opened lower periphery of the rectangular microwave packaging bag. A packaging bag for an unsealed microwave oven characterized by having a weldable portion capable of being provided. 5. A heat-sealable, heat-sealable upper and left peripheral portion of the front and rear two heat-resistant synthetic resin sheets, an opening at a lower periphery thereof, and a weldable portion which can be hermetically sealed by a heat-sealing means is provided below the opening. A rectangular heat-resistant synthetic resin sheet is formed around the upper part of the microwave-wrapping bag with heat-sealing means to form a wide heat-welded portion. A packaging bag for an unsealed microwave oven, characterized in that a vent for internal pressure adjustment is formed at one corner and a gripping position indicator is provided at the other corner.