KR20190021914A - Packaging sheet manufacturing method for electronic range food packaging bag and electronic range packaging bag thereby - Google Patents

Abstract

The present invention provides a manufacturing method of packing paper sheets for a food packing bag of a microwave oven and a packing bag. The manufacturing method of packing paper sheets for a food packing bag of a microwave oven of the present invention includes: a step of arranging a packing paper sheet (12) forming the packing bag for a microwave oven so as to be punchable with a punching pin (20); and a step of punching the packing paper sheet (12) by the punching pin (20) to form a hole (H) for pressure discharge on the packing paper sheet (12), wherein the hole (H) is formed on the packing paper sheet (12) when a plurality of valve flaps (12FL) formed by a plurality of guide lines (12CL) is opened.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging sheet for a microwave oven food packaging bag,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of manufacturing a sheet for a packaging sheet for a microwave oven food packing bag and a microwave oven food packaging bag using the same. More particularly, The present invention relates to a microwave oven food packaging bag for a microwave oven and a microwave oven food packaging bag.

As the use of microwave ovens becomes popular, packaged bag foods for microwave ovens are being widely distributed in the market, which enables the food to be easily warmed. There are a lot of packed bag foods for microwave ovens in large marts as well as general small marts. In the case of packaged bag food for microwave oven, it is popularized in frozen and refrigerated state.

In this case, in the process of putting the packaged bag food for microwave oven into the microwave oven and there is a pressure in the inside of the packaged bag to heat the packaged bag food for the microwave oven, A packaging bag for a microwave oven in which a hole capable of pulling out a microwave oven is formed.

Conventionally, as a method of forming a hole in a packing bag, a method of forming a hole in a packing bag by a laser using a laser drilling machine is often used.

However, in the case of forming holes (pressure discharge holes) in the wrapping paper sheet of the packaging bag by laser machining, there is a problem that the laser processing hole is torn around by the pressure in the process of heating the microwave packaging bag product in the microwave oven . Particularly, when a hole is formed in the wrapping paper sheet by laser machining, a hole is formed by melting the wrapping paper sheet with a laser, thereby forming a hole portion which is melted and hardened around the hole. There is a problem that the periphery of the hole is torn more easily due to the edge of the hole around the hole by the pressure in the process.

When the microwave oven packaging bag is heated in a microwave oven and the hole is torn, there is a problem that the food is not properly heated and the taste of the food is reduced. Most of all, the hole around the hole of the wrapped bag is torn and the food is not warmed up properly. Therefore, it is a big problem that it is difficult for the consumer to eat the food by heating.

In addition, when the microwave oven packing bag is heated, the hole tears. This is because the pressure and the number or size of the holes are not properly matched when the microwave oven is warmed. In order to match the pressure and the number of holes or the size of the microwave oven There is a problem in that it is not easy to produce a wrapping paper sheet of a packing bag because the size and the number of the holes must be precisely adjusted.

Korean Utility Model Registration No. 20-0190941 (registered on May 19, 2000) Korean Utility Model Registration No. 20-0337875 (registered on December 26, 2003) Korean Utility Model Registration No. 20-0356122 (Registered on July 3, 2004)

SUMMARY OF THE INVENTION The present invention has been developed in order to solve the above-mentioned problems, and an object of the present invention is to provide a microwave oven capable of preventing a hole for pressure discharge from being blown by pressure when the food is heated in a microwave oven, The present invention is to provide a new method of manufacturing a wrapping paper sheet for a microwave oven food packing bag and a microwave oven food packing bag by which the reliability of the wrapping bag food for microwave oven can be ensured by preventing the blowing phenomenon.

According to an aspect of the present invention, there is provided a method of manufacturing a microwave oven packaging bag, the method comprising: disposing a wrapping paper sheet for manufacturing a microwave oven packaging bag so that the sheet can be punched with a punching pin; And forming a hole in the wrapping paper sheet by punching the wrapping paper sheet by the punching pin, wherein the hole is formed when a plurality of valve flaps formed by the plurality of guide lines are fired on the wrapping paper sheet The present invention also provides a method for manufacturing a sheet for a packaging sheet for a microwave oven food packing bag.

And the hole is opened when the plurality of valve flaps are opened.

Wherein the punching pin has a polygonal cross section and has a gradually decreasing cross-sectional area from the top to the bottom, and has a pointed portion at a lower end thereof. When the punching pin punches the wrapping paper sheet, the plurality of guide lines are formed, Wherein the plurality of valve flaps are formed.

In addition, according to the present invention, wrapping sheet sheets having holes penetrating to the inner and outer surfaces thereof are disposed to face each other, the periphery of the wrapping sheet sheets arranged to face each other is joined by the bonding portion, and an opening portion is formed on one side, And a plurality of valve flaps are formed by the plurality of guide wires. The microwave-resistant food packaging bag according to claim 1,

Wherein the hole is formed by a punching pin, the punching pin has a polygonal cross section, and the cross-sectional area gradually decreases from the top to the bottom, so that the pointed portion is provided at the lower end thereof. When the punching pin is punched by the punching pin And the plurality of valve flaps for opening and closing the holes are formed while the plurality of guide lines are formed.

According to the present invention, there is an effect that when the wrapping bag product is heated by the microwave oven, the circumference of the pressure discharge hole is prevented from being torn by the pressure. In the case of forming the holes in the wrapping paper sheet by laser processing in the past, the edges of the hole, which are melted and hardened around the holes, are often broken or torn. In the present invention, the plurality of valve flaps spread without pressure, The size of the hole is opened to a size suitable for discharging the pressure, thereby completely blocking the problem of tearing around the hole due to pressure in the process of heating the microwave oven packaging bag product in the microwave oven.

1 is a perspective view schematically showing a state prior to forming a valve flap by punching a wrapping paper sheet with a punching pin in a method of manufacturing a wrapping paper sheet for a microwave oven food packing bag;
FIG. 2 is a perspective view showing a process of perforating the wrapping paper sheet by the punching pin shown in FIG.
3 is a perspective view showing the state after the punching pin shown in Fig. 2 is punched into the wrapping paper sheet; Fig.
4 is a perspective view showing a state in which a valve flap is formed on the wrapping sheet shown in Fig.
5 is a longitudinal sectional view showing the state after the punching pin shown in Fig. 2 is punched into the wrapping paper sheet
6 is a longitudinal sectional view showing a state in which the valve flap of the wrapping paper sheet shown in Fig. 5 is pressed
7 is a perspective view showing a state in which a packing bag is formed by the wrapping sheet shown in Fig.
8 is an external perspective view of the food packaging bag product for microwave oven formed by the packaging bag shown in Fig.
Figure 9 is a side cross-sectional view showing the valve flap shown in Figure 8;
10 and 11 are side sectional views showing a state in which a hole is opened while a valve flap is opened when a packaged bag product shown in Fig. 7 is cooked in a microwave oven; Fig.
12 to 14 are enlarged perspective views illustrating a process of forming a valve flap by punching a wrapping paper sheet with a punching pin.
15 to 17 are enlarged perspective views illustrating a process of forming a valve flap by perforating a wrapping paper sheet by a modified punching pin.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The objects, features and advantages of the present invention will be more readily understood by reference to the accompanying drawings and the following detailed description. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. For example, if a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, It is to be understood that other components may be "connected "," coupled "

Referring to the drawings, a method for manufacturing a wrapping paper sheet for a microwave oven food packing bag according to the present invention includes a plurality of holes punched by using a punching pin (20) And the hole H is opened and closed by a plurality of valve flaps 12FL formed by a plurality of guide lines 12CL so that the microwave oven food packing bag 12, And prevents the hole (H) from breaking or popping due to pressure when the product (122) is inserted into the microwave oven and warmed. The guide line 12CL is formed by punching the wrapping paper sheet 12 with the punching pin 20 so that the wrapping paper sheet 12 becomes a line drawn to a certain depth from the surface of the wrapping paper sheet 12 or the wrapping paper sheet 12 is completely It can be a broken wire.

In the present invention, the packaging sheet 12, which is a fabric for making a packaging bag, is disposed below the punching pin 20, and a pressure-releasing hole H is formed in the packaging sheet 12 by the lowering of the punching pin 20 Be prepared to do. A step of disposing the packaging paper sheet 12 for manufacturing a packaging bag for a microwave oven so that it can be punched by the punching pin 20 is performed. At this time, the punching pin 20 can be provided with the hole H formed by the opening of the valve flap 12FL on the wrapping paper sheet 12 by forming the valve flap 12FL by a lifting operation like the pressing device.

On the other hand, the punching pin 20 has a polygonal cross section, and its cross-sectional area gradually decreases from the top to the bottom, so that the pointed portion is provided at the lower end. In the present invention, the punching pin 20 has a square cross-section and a cross-sectional area gradually decreases from the top to the bottom, so that the pointed portion is provided at the lower end. The corner portion of the punching pin 20 serves as a blade for tearing the wrapping paper sheet 12. [ Four corner portions of the punching pin 20 of the square cross section divide the wrapping paper sheet 12 and form the four guide lines 12CL in the wrapping paper sheet 12 so that four valve flaps 12FL) are formed.

At this time, the punching pin 20 may have a triangular cross section, and the cross-sectional area gradually decreases from the top to the bottom, and the pointed portion may be provided at the lower end. In this case, three corner portions of the punching pin 20 separate the wrapping paper sheet 12 to form the three guide lines 12CL on the wrapping paper sheet 12, so that three valve flaps 12FL Is formed.

When the packaging sheet 12 is punched by the punching pin 20, the plurality of guide flaps 12CL are formed, and the plurality of valve flaps 12FL for opening and closing the holes H of the packaging sheet are formed . A plurality of valve flaps 12FL are formed by a plurality of guide lines 12CL with the punching pins 20 sticking down the packaging sheet 12. A portion of the lower end of the punching pin 20 that is pressed and broken is referred to as a hole forming center portion. A plurality of guide lines 12CL are formed radially with respect to the hole forming center portion. A plurality of valve flaps 12FL are formed in the radial direction.

When the punching pin 20 is pushed toward the wrapping paper sheet 12 to form a plurality of valve flaps 12FL by the plurality of guide lines 12CL, the valve flaps 12FL And a plurality of valve flaps 12FL are overlapped by pressing the package sheet 12 so as to block the holes H formed between the valve flaps 12FL. A plurality of valve flaps 12FL protrude from the inside surface of the wrapping paper sheet 12 in which the punching pins 20 have been inserted and are opposed to each other, The valve flaps 12FL are pressed again toward the outer surface of the wrapping paper sheet 12 so that the plurality of valve flaps 12FL turn into the state in which the holes H of the wrapping paper sheet 12 are closed. And the valve flap 12FL of the wrapping paper sheet 12 may be a reverse pressing step. The microwave oven food packing bag product 122 manufactured by the wrapping paper sheet 12 is inserted into the microwave oven and the hole H of the calling sheet is blocked by the plurality of valve flaps 12FL before being heated, When the microwave oven food packing bag product 122 is put into the microwave oven and warmed up, a plurality of valve flaps 12FL are opened to open the holes H. The plurality of valve flaps 12FL serve as valves for opening and closing the holes H of the wrapping paper sheet 12 constituting the microwave oven food packaging bag product 122. [

On the other hand, according to the present invention, the packaging bag 12PB having the valve flaps 12FL formed by the punching pins 20 is used to manufacture the packaging bag 12PB. The microwave oven food packing bag according to the present invention is characterized in that wrapping paper sheets 12 having holes H penetrating to the inner and outer surfaces thereof are arranged to face each other and the peripheral portions of the wrapping paper sheets 12 arranged to face each other And a food receiving portion communicating with the opening portion by forming an opening portion on one side and the hole H is configured to include a plurality of valve flaps 12FL by a plurality of guide lines 12CL. At this time, it is not necessary to form the guide line 12CL and the valve flap 12FL on one of the wrapping paper sheets 12 out of the two sheets of wrapping paper sheets 12. If the packaging bag 12PB has a rectangular envelope shape, two sheets of packaging paper sheets 12 on which the valve flaps 12FL are formed are arranged to face each other with the punching pins 20, and the two sheets of packaging paper sheets 12 Three circumferential portions are joined by thermal bonding or the like to form three bonding portions 12BP, and one circumferential portion of the packaging bag in which the bonding portion 12BP is not formed is an open portion. The food packaging bag product 122 for microwave oven is manufactured by injecting food into the opening portion of the packaging bag to form a joint portion in the opening portion. When the valve flap 12FL is formed on the package back sheet constituting the food bag packaging product 122 for microwave oven to heat the food bag packaging product 122 for microwave oven into the microwave oven to warm up the product, The valve flaps 12FL are opened to form the holes H and the pressure is discharged to the outside of the package bag through the holes H. [

A packaging bag is manufactured by the packaging sheet 12 manufactured by the present invention having the above-described configuration, and the microwave-resistant food-packing bag product 122 manufactured by using the packaging bag is put into a cooking stove to warm the food The process of discharging the pressure from the packaging bag by the valve flap 12FL formed on the packaging sheet 12 will be described as follows.

The plurality of valve flaps 12FL of the wrapping paper sheet 12 are punched out before the microwave oven food packaging bag product 122 (hereinafter referred to as wrapping bag product 122 for convenience of explanation) is put into the microwave oven and heated, A plurality of valve flaps 12FL are blocking the pressure discharging holes H of the packed bag product 122 in a state in which the pins 20 are pushed in a direction opposite to the tearing face.

When the packaged bag product 122 is put in the microwave oven and heated in such a state, the pressure generated inside the packaged bag product 122 causes the plurality of valve flaps 12FL to be separated from the inner surface of the packaged bag product 122 The pressure is released to the outside of the packed bag product 122 because the hole H for discharging the pressure of the wrapping paper sheet 12 is opened while being spread on the outer surface. The hole H is opened when a plurality of valve flaps 12FL are opened. Wherein a packaging bag is formed by wrapping paper sheets (12) in which a plurality of valve flaps (12FL) for opening the holes (H) are formed, and a package for a microwave oven When the bag flaps 12FL are opened in the package sheet 12 when the bag food for microwave oven is heated by the microwave oven and the food is warmed or cooked, And the pressure is discharged through the fulcrum hole H as a main feature.

Therefore, according to the present invention, there is an effect that when the wrapped bag article 122 is heated by the microwave oven, the circumference of the pressure discharge hole H is prevented from being torn by the pressure. Particularly, in the case where the hole H is formed in the wrapping paper sheet 12 by laser processing in the past, the edge of the hole H melted and hardened around the hole H often breaks or tears. Since the plurality of valve flaps 12FL are opened without being pressurized, the size of the pressure discharge hole H is opened to a proper size to allow the pressure to be discharged, so that the microwave oven packing bag product 122 is heated in the microwave oven The problem that the hole H is torn around by the pressure in the process is completely blocked.

In addition, there is no case where the wrapped bag product 122 is heated in the microwave oven and the hole H is torn, so that the food can not be heated properly, and there is no problem such that the taste of the food is reduced . For example, if you cook potatoes in a microwave and cook them, the taste of potatoes is very good. The circumference of the hole H of the packed bag product 122 is torn to prevent the food from being heated up properly. Therefore, it is an important feature that the consumer does not have any difficulty in eating and consuming the food.

Further, since it is not necessary to precisely match the size and the number of the holes H to match the number and size of the holes H and the pressure when heating or cooking food in the microwave oven, It is easy to manufacture the package 12 and the packaging bag. It is not necessary to precisely match the number and size of the pressure discharge holes H for proper pressure discharge when the packaged bag product 122 is cooked in a microwave oven.

In addition, according to the present invention, the length of the guide line 12CL and the size of the valve flap 12FL can be easily adjusted according to the type of food packaged in the packing bag by adjusting the descent height of the punching pin 20 . The length of the guide line 12CL and the size of the valve flap 12FL can be easily adjusted by adjusting the descending height of the pinching pin according to what kind of food is heated by the microwave oven. In the present invention, the punching pin 20 has a polygonal cross section, and the cross-sectional area gradually decreases from the top to the bottom, so that the punching pin 20 is lowered at the lower end thereof. The length of the guide line 12CL and the size of the valve flap 12FL can be easily adjusted by adjusting only the height of the punching pin 20 (that is, the depth at which the punching pin 20 fits into the wrapping paper sheet 12).

The length of the guide line 12CL formed on the wrapping paper sheet 12 and the size of the valve flap 12FL can be easily adjusted so that the microwaveable food wrapping bag product 122, It is possible to easily adjust the size of the hole H (the hole H for pressure relief) when the valve flaps 12FL are opened when the microwave oven is heated by the microwave oven. The flaring size of the hole H can be easily adjusted by the plurality of valve flaps 12FL to match the food to be cooked in the microwave oven.

The punching pin 20 has a polygonal cross section and gradually decreases in cross sectional area from the top to the bottom so that the pointed portion is provided at the lower end. It is easy to form the flap 12FL. The punching pin 20 first pierces the wrapping paper sheet 12 first and then the punching pin 20 descends downwardly so that a plurality of guide wires 12CL are radially wound on the centering portion of the punching sheet 20 The valve flaps 12FL and the valve flaps 12FL are formed in the wrapping paper sheet 12 with the punching pins 20 so that the holes H to be formed are more easily formed So that it can be formed on the wrapping paper sheet 12.

In the present invention, a cross-shaped punching pin 20 may be used in place of the punching pin 20 having a square cross section. The cross-shaped punching pin 20 is also gradually reduced in cross-sectional area from the top to the bottom so that the lower end of the cross-shaped punching pin 20 is pointed. In addition, the cross-shaped punching pin 20 crosses two blades crosswise. When viewed from the flat cross-section of the cross-shaped punching pin 20, the cross-sectional areas of the two blades gradually decrease from the center to both ends, The tip of the blade is made of sharp blade.

When the packaging paper sheet 12 is pierced with the cross-shaped punching pin 20, the guide line 12CL is more reliably formed due to the sharp blade portion of each blade, so that the valve flap 12FL can be formed more reliably I have. It is possible to prevent the case where the guide line 12CL of the wrapping paper sheet 12 is not formed well and to securely form the plurality of valve flaps 12FL on the wrapping paper sheet 12. [

On the other hand, during the cooking in the microwave oven, the wrapping bag is swollen to a crumbling shape. In the past, when the pressure inside the wrapping bag exceeds a certain pressure, it is burst and pressure is counted. Therefore, since the vapor pressure at the time of cooking does not penetrate into the inside of the food to be cooked, there is a problem that the food is not uniformly ripened and the cooking time becomes long.

However, since the valve flap 12FL is provided in the present invention, the interior of the packaged bag product is maintained at a certain pressure (a pressure at which the packaged bag product does not break) during the cooking in the microwave oven. On the other hand, if the pressure inside the packed bag is raised to a certain pressure or more, the valve flap is opened to form a hole, and the pressure (overpressure) inside the packed bag is discharged. Conventionally, there is a problem in that when the packaged bag product is cooked in the microwave oven, a burst phenomenon occurs and the pressure inside the packaged bag product can not be properly maintained until the cooking is completed. On the other hand, The pressure inside the bag is maintained. This is the most important feature that distinguishes it from the conventional one.

Therefore, according to the present invention, since the vapor pressure at the time of cooking the packaged bag product in the microwave oven penetrates into the inside of the food to be cooked, there is an effect that the food contained in the packaged bag product is uniformly ripened, It also has the effect of shortening the cooking time by penetrating well to the vapor pressure. For example, in the present invention, since the valve flap 12FL induces the microwave oven to function as a pressure cooker when warming the packaged bag product, the food (for example, potatoes) There is synergy that shortens.

In addition, in a microwave oven, when a packaged bag containing food is heated, moisture often evaporates and dries. Therefore, since the moisture is dried, the inherent flavor of the cooked food is not produced. The taste of the cooked food will decrease.

However, in the present invention, since the holes H formed in the wrapping paper sheet 12 (i.e., the pores formed by the opening of the valve flaps 12FL) are so small that moisture is not evaporated during cooking in the microwave oven, maintain. The hole H (pore) formed in the wrapping paper sheet 12 is about 5 to 10 mu m. As a result, the size of the hole H is very small.

Therefore, when the food is cooked by heating the packaged bag product in the microwave oven, the moisture is not evaporated but remains in the food. That is, the original moisture of the cooked food is maintained. Since the intrinsic moisture of the cooked food is maintained, the flavor inherent in the food can be obtained. The taste of cooked food is very good due to proper moisture. For example, when cooking potatoes, the taste of potatoes is very good due to proper moisture.

Of course, in the embodiment of the present invention, potato is taken as an example of the food to be cooked, but it is natural that it can be utilized in cooking all kinds of foods contained in the bag products other than potatoes.

The specific embodiments of the present invention have been described above. It is to be understood, however, that the scope and spirit of the present invention is not limited to these specific embodiments, and that various modifications and changes may be made without departing from the spirit of the present invention. If you have, you will understand.

Therefore, it should be understood that the above-described embodiments are provided so that those skilled in the art can fully understand the scope of the present invention. Therefore, it should be understood that the embodiments are to be considered in all respects as illustrative and not restrictive, The invention is only defined by the scope of the claims.

12. Wrapping paper sheet 12CL. Guide line
12FL. Valve flap 12PB. Packing bag
20. Punching pins 122. Packing bag products

Claims (4)

Disposing a wrapping paper sheet (12) for making a packaging bag for a microwave oven so as to be punchable with a punching pin (20);
And forming a hole (H) in the wrapping paper sheet (12) by punching the wrapping paper sheet (12) with the punching pin (20)
Wherein the hole (H) is formed when a plurality of valve flaps (12FL) formed by a plurality of guide lines (12CL) are spread on the wrapping paper sheet (12) .
The method according to claim 1,
The punching pin 20 has a polygonal cross section and gradually becomes smaller in cross section from the top to the bottom. The punching pin 20 has a pointed portion at the lower end thereof. When the punching pin 20 is punched through the punching pin 20, Wherein the plurality of valve flaps (12FL) for opening and closing the holes (H) are formed while the guide lines (12CL) are formed.
(12) having holes (H) penetrating to the inner and outer surfaces thereof are arranged to face each other, and the peripheral portions of the wrapping paper sheets (12) arranged to face each other are joined by the joint portion and the openings are formed on one side, And a food receiving portion communicating with the opening portion,
Wherein the hole (H) is configured to include a plurality of valve flaps (12FL) by a plurality of guide lines (12CL).
The method of claim 3,
The hole H is formed by a punching pin 20. The punching pin 20 has a polygonal cross section and gradually becomes smaller in cross section from the top to the bottom, Wherein the plurality of valve flaps (12FL) for opening and closing the holes (H) are formed while the plurality of guide lines (12CL) are formed when the wrapping paper sheet (12) Food packaging bags.

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