KR20230162887A - Vapor Drain Valve for Microwave with Sticker Type - Google Patents

Abstract

The present invention relates to a sticker-type steam release valve for a microwave oven that is attached to a lid film to prevent damage and deformation of the container due to high-temperature steam during microwave cooking. More specifically, it relates to a steam release valve for a microwave oven that accommodates food inside and is sealed. When cooking food by inserting a food packaging container into a microwave oven, when the pressure inside the packaging container reaches a certain level due to moisture and steam generated from the food inside the packaging container, the vapor release valve formed on the lid film opens automatically. As the steam inside the packaging is discharged to the outside, the pressure inside the packaging decreases, preventing the packaging container from being damaged or deformed, and the cost of manufacturing the vapor release valve can be significantly reduced, making it possible for disposable packaging. A new type of sticker-type vapor release valve for microwave ovens that can be applied to containers and packaging without increasing cost, and can also be easily applied to automation equipment lines, ensuring rapid and general use. It's about.

Description

Vapor Drain Valve for Microwave with Sticker Type}

The present invention relates to a sticker-type steam release valve for a microwave oven that is attached to a lid film to prevent damage and deformation of the container due to high-temperature steam when cooking food using a microwave oven. More specifically, it relates to a steam release valve for a microwave oven of the sticker type attached to the lid film. When cooking food by inserting a sealed food packaging container into a microwave oven, when the pressure inside the packaging container reaches a certain level due to the moisture and steam generated from the food inside the packaging container, the vapor formed on the lid film is discharged. As the valve opens automatically and the steam inside the packaging is discharged to the outside, the pressure inside the packaging decreases, preventing damage or deformation of the packaging container in advance, and significantly reducing the cost of manufacturing the steam discharge valve. This is a new type of sticker type that can be applied to disposable packaging containers and wrapping paper without increasing cost, and the vapor release valve can be easily applied to the automated packaging equipment line, ensuring rapid and general use. This relates to a steam release valve for a microwave oven.

In general, many foods are being released that are cooked by heating in a microwave oven.

In addition, when the contents of food contained in a packaging container or packaging paper are heated in a microwave oven, the moisture contained in the contents evaporates and steam is generated, and the internal pressure caused by the steam gradually increases, causing the packaging container or packaging paper to expand. As this happens, the thermally bonded part may burst.

Therefore, for most of these foods, when heating the contents of the packaging container or packaging paper using a microwave, transfer it to a microwave-safe container or glass container and then heat it in the microwave, or remove part of the packaging paper first. Since it has to be cooked by heating in a microwave after opening, it is inconvenient to control the internal pressure by discharging steam, and if the food is liquid, it can easily spill and contaminate the inside of the microwave or be consumed. There was this difficulty that became difficult.

In addition, when the contents of food, etc. are transferred to a microwave container or cooked while the packaging is opened, there is a problem in that the moisture in the food evaporates and the taste and texture deteriorate.

The gas discharge valve for packaging materials (Patent Registration No. 10-2040443 (registration date: October 29, 2019), which was pre-registered by the present applicant as a prior art to solve the above problems, is attached to the outer surface of the packaging material and is used in the through hole. It includes a strong adhesive layer adhered to the edge in the longitudinal direction, and a low adhesive layer formed on the inside of the strong adhesive layer and adhered to the upper surface of the hole, where the edge is strongly adhered by pressure when gas is generated inside the packaging material. When the layer is adhered to the packaging material, the low-adhesion layer swells and partially opens to discharge gas. When the pressure is removed, the low-adhesion layer returns to its original state and seals the hole, blocking the inflow of external air.

Another conventional technology, published in Patent No. 10-2021-0093512 (publication date: July 28, 2021), is a food packaging paper that automatically releases steam to prevent damage when cooking in a microwave oven, and the lower surface of the paper is heat-sealed against each other. A corona surface-treated corona layer that weakens the adhesive force by thermal bonding so that when the internal pressure of the food packaging reaches a certain pressure, the adhered portion is automatically separated and the vapor inside the food packaging is automatically discharged to the outside; It is applied between the adhesive layer applied to the bottom of the first-grade paper and the top of the second-grade paper, weakening the adhesive force between the bottom of the first-grade paper and the top of the second-grade paper, so that even when the internal pressure of the food packaging paper reaches a certain pressure, the corona layer automatically When the paper is not separated and a crack is formed due to the rupture of the paper, the attached part is automatically separated by the steam discharged through the crack, and the vapor inside the food packaging is automatically discharged to the outside. It is composed of a wax layer containing oil. It is characterized by

However, food packaging having the structure for discharging steam as described above is difficult to manufacture due to its complex vapor discharging structure, and due to its complex structure, it cannot properly respond to various external environments, so there is a problem in that the vapor discharging process is not performed uniformly.

In addition, there are cases where the steam discharge structure is complicated and difficult to manufacture, or the steam discharge performance is not perfect depending on working conditions. In addition, when high-temperature and high-pressure steam exits the steam outlet, there is a problem in that the finely torn portion around the steam outlet does not properly withstand the high temperature and high pressure, and the packaging is torn or burst.

Furthermore, in the case of packaging paper for instant food, a steam pressure sterilization process is performed after packaging the food. During this process, the steam discharge structure is deformed by high-temperature steam, or the surrounding paper with the vapor discharge structure is deformed and steam is released. A problem occurred in which the discharge structure was damaged.

Registered Patent Publication No. 10-2040443 (registration date: October 29, 2019) “Gas discharge valve for packaging materials” Public Patent Publication No. 10-2021-0093512 (Publication date: July 28, 2021) “Food packaging that automatically releases steam to prevent damage when cooking in a microwave oven.”

The present invention was made in consideration of the above circumstances, and the purpose of the present invention is to insert a food packaging container or wrapper with food packaged and sealed inside the microwave oven to cook the food, and the food inside the wrapper is cooked. When the pressure inside the packaging reaches a certain level due to moisture and steam, one side of the adhesive packaging paper automatically opens and closes and the vapor inside the packaging is discharged to the outside, causing the packaging to be damaged by the internal pressure or the packaging container to be deformed. Alternatively, the aim is to provide an improved sticker type vapor release valve for a microwave oven that can prevent damage to the microwave oven and safety accidents.

Another purpose of the present invention is to significantly reduce the cost required to manufacture the vapor release valve, so that it can be applied to disposable packaging containers and packaging materials without increasing cost, and also to prevent the attachment position of the vapor release valve from being precise. The goal is to provide a sticker-type microwave oven vapor release valve that can perform the vapor release function even if the device is not in use and can be easily applied to currently used automated packaging equipment lines, thereby ensuring rapid and general use.

The problem to be solved by the present invention is not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those skilled in the art from the description below. will be.

The vapor discharge valve for a sticker-type microwave oven according to the object of the present invention described above is composed of a base film having a thickness in the range of 30㎛ to 150㎛, and a saturated thermoplastic resin, oil and additives mixed at the lower part of the base film. It includes a low-adhesion layer, wherein the vapor discharge valve is a sticker-type microwave oven vapor release valve characterized in that a base film with a low-adhesion layer formed on the bottom is wound in the form of a tape, cut to fit the length of the packaging material, and attached. This can be achieved by means of a valve.

In another embodiment, the sticker-type vapor discharge valve for a microwave oven includes a base film having a thickness in the range of 30㎛ to 150㎛, and is formed at the bottom of the base film and covers the vapor discharge hole formed in the packaging material. and an adhesive layer consisting of a low-adhesion layer made of a mixture of a saturated thermoplastic resin, oil, and additives, and a strong adhesive layer formed on both sides of the low-adhesion layer, wherein when high-temperature steam is generated inside the packaging material, pressure A sticker-type steam release valve for a microwave oven, which is characterized in that the low-adhesion layer is opened and steam is discharged, and when the steam pressure is removed, the low-adhesion layer returns to its original state and seals the steam discharge hole, blocking the inflow of external air. It can be achieved by B.

The low-adhesion layer is a resin or rubber series resin with self-adhesion selected from low-specific gravity PE, metallocene, ethylene vinyl acetate copolymer (EVA), PB, EMA, EAA, EMAA, and EMMA, oil, and additives. It is characterized by being mixed in a certain ratio.

The saturated thermoplastic resin is characterized as being a resin or a rubber-based resin having self-adhesiveness selected from low-specific gravity PE, metallocene, EVA, PB, EMA, EAA, EMAA, and EMMA.

The strong adhesive layer is characterized by being made of an adhesive resin selected from acrylic resin, rubber resin, silicone resin, and butyl resin, or a mixture thereof.

As described above, the sticker-type vapor release valve for a microwave oven according to the present invention prevents the generation of food inside the package when food is cooked by inserting a sealed food packaging container or package into the microwave oven. When the pressure inside the packaging reaches a certain level due to moisture and steam, one side of the adhesive packaging paper automatically opens and closes, and the vapor inside the packaging paper is automatically discharged to the outside, causing the packaging paper to be damaged by the internal pressure or the packaging container to be damaged. It has the effect of preventing deformation due to pressure, damage to the microwave oven, and safety accidents.

In addition, the cost required to manufacture the steam release valve can be significantly reduced, so it can be applied to disposable packaging containers and packaging materials without increasing cost, and also performs the steam release function even if the attachment position of the steam release valve is not accurate. It can be easily applied to currently used automated packaging equipment lines, allowing for rapid, general-purpose use.

In addition, the water vapor generated from the contents during cooking is removed just enough to prevent deformation of the container, and then the container is automatically closed, allowing the moisture in the cooked food to remain almost as it is, thereby preventing deformation of the food or deterioration of taste as much as possible. This has the effect of maintaining the good taste and texture.

In addition, the sticker-type steam release valve for a microwave oven according to the present invention is divided into an adhesive part that remains attached to the packaging container without any additional configuration modification and a valve part around the discharge hole, thereby facilitating the production and production of the steam release valve. It is easy to use and can be put into the packaging equipment line without much modification.

In addition, the sticker-type vapor discharge valve for a microwave oven according to the present invention may be provided in the form of a single sticker depending on the type of packaging container or wrapping paper to be installed. When provided in the form of a single sticker, a strong adhesive layer is formed on both sides. This has the effect of maintaining the vapor discharge function while firmly maintaining the attachment to the packaging container or packaging paper.

The effects of the present invention are not limited to the effects mentioned above, and various effects may be included within the scope apparent to those skilled in the art from the contents described below.

1 is a perspective view of a sticker-type steam discharge valve for a microwave oven according to a first embodiment of the present invention.
Figure 2 is a perspective view showing a sticker-type steam discharge valve for a microwave oven attached to an instant food packaging container according to the first embodiment of the present invention.
Figure 3 is a diagram showing the process of steam being discharged while the sticker-type steam discharge valve for a microwave oven is attached to an instant food packaging container according to the first embodiment of the present invention.
Figure 4 is a view showing a sticker-type vapor discharge valve for a microwave oven attached to a bag-type packaging according to the first embodiment of the present invention.
Figure 5 is a perspective view of a sticker-type steam discharge valve for a microwave oven according to a second embodiment of the present invention.
Figure 6 is a view showing a state where a sticker-type steam discharge valve for a microwave oven is attached to the lid film of an instant food packaging container according to a second embodiment of the present invention.
FIG. 7A is a cross-sectional view taken along line AA of FIG. 6 showing the sticker-type steam discharge valve for a microwave oven attached to the packaging according to the second embodiment of the present invention.
Figure 7b is a cross-sectional view taken along line BB of Figure 6 showing the sticker-type steam discharge valve for a microwave oven according to the second embodiment of the present invention attached to the packaging.
Figure 8a is a cross-sectional view taken along line AA of Figure 6 showing the steam discharge valve for a sticker-type microwave oven according to the second embodiment of the present invention in a state in which it is opened by steam.
Figure 8b is a cross-sectional view taken along line BB of Figure 6 showing the steam discharge valve for a sticker-type microwave oven according to the second embodiment of the present invention in a state in which it is opened by steam.
Figure 9 is a schematic diagram showing the external appearance of a sticker-type steam discharge valve for a microwave oven according to a second embodiment of the invention.

Below, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, since the description of the present invention is only an example for structural and functional explanation, the scope of the present invention should not be construed as limited by the examples described in the text.

In other words, since the embodiments can be modified in various ways and can take various forms, the scope of rights of the present invention should be understood to include equivalents that can realize the technical idea. In addition, the purpose or effect presented in the present invention does not mean that a specific embodiment must include all or only such effects, so the scope of the present invention should not be understood as limited thereby.

Meanwhile, the meaning of the terms described in the present invention should be understood as follows.

Terms such as “first” and “second” are used to distinguish one component from another component, and the scope of rights should not be limited by these terms.

For example, a first component may be named a second component, and similarly, the second component may also be named a first component.

When a component is referred to as being “connected” to another component, it should be understood that it may be directly connected to the other component, but that other components may also exist in between. On the other hand, when a component is referred to as being “directly connected” to another component, it should be understood that there are no other components in between. Meanwhile, other expressions that describe the relationship between components, such as "between" and "immediately between" or "neighboring" and "directly neighboring" should be interpreted similarly.

Singular expressions should be understood to include plural expressions, unless the context clearly indicates otherwise, and terms such as “comprise” or “have” refer to the specified features, numbers, steps, operations, components, parts, or them. It is intended to specify the existence of a combination, and should be understood as not excluding in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

All terms used herein, unless otherwise defined, have the same meaning as commonly understood by a person of ordinary skill in the field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as consistent with the meaning they have in the context of the related technology, and cannot be interpreted as having an ideal or excessively formal meaning unless clearly defined in the present invention.

Now, the sticker-type steam discharge valve for a microwave oven according to the first embodiment of the present invention will be described in detail with reference to the drawings.

Among the attached drawings, Figure 1 is a perspective view of a sticker-type steam discharge valve for a microwave oven according to the first embodiment of the present invention, and Figure 2 is a sticker-type steam discharge valve for a microwave oven according to the first embodiment of the present invention. is a perspective view showing the state attached to the ready-to-eat food packaging container, and Figure 3 shows the process in which steam is discharged while the sticker-type steam discharge valve for a microwave oven according to the first embodiment of the present invention is attached to the ready-to-eat food packaging container. , and Figure 4 is a diagram showing a sticker-type vapor discharge valve for a microwave oven attached to a bag-type packaging according to the first embodiment of the present invention.

The present invention relates to a sticker-type steam release valve for a microwave oven that is attached to a lid film to prevent damage and deformation of the container due to high-temperature steam during microwave cooking. More specifically, it relates to a steam release valve for a microwave oven that accommodates food inside and is sealed. When cooking food by inserting a food packaging container into a microwave oven, when the pressure inside the packaging container reaches a certain level due to moisture and steam generated from the food inside the packaging container, the vapor release valve formed on the lid film opens automatically. As the steam inside the packaging is discharged to the outside, the pressure inside the packaging decreases, preventing the packaging container from being damaged or deformed, and the cost of manufacturing the vapor release valve can be significantly reduced, making it possible for disposable packaging. A new type of sticker-type vapor release valve for microwave ovens that can be applied to containers and packaging without increasing cost, and can also be easily applied to automation equipment lines, ensuring rapid and general use. It's about.

As shown, the sticker-type steam discharge valve for a microwave oven (hereinafter referred to as 'steam discharge valve') 100 according to the present invention includes a base film 10 having a thickness in the range of 30㎛ to 150㎛, and , a low-adhesion layer 20 made of a mixture of saturated thermoplastic resin, oil, and additives is formed integrally with the lower part of the base film 10.

In addition, the vapor discharge valve 100 is used by winding the base film 10 with the low-adhesion layer 20 formed on the bottom in the form of a tape and cutting it to fit the length of the lead film or packaging paper attached to the packaging container. .

Additionally, a printing layer (not shown) may be formed on the base film 10.

The base film 10 may be a film selected from PET, PP, PE, or a film made of a material such as NY or EVOH with a gas blocking function, or AL-Foil, etc. may be used to block moisture in the film made of the above material. It may be composed of a film of these mixed materials.

In addition, the saturated thermoplastic resin constituting the low-adhesion layer may be composed of a resin or a rubber-based resin with self-adhesion selected from low-specific gravity PE, metallocene, EVA, PB, EMA, EAA, EMAA, and EMMA. You can.

That is, when the vapor discharge valve 100 configured as above is used on the lead film 2 of the packaging container 1 as shown in Figures 2 and 3, the vapor discharge hole 2a formed in the lead film 2 is used. ) is attached to the lid film (2) in the form of covering and sealing, and an adhesive section (b) is formed in the longitudinal direction on both sides centered on the upper valve section (a) where the vapor discharge hole (2a) is formed, so that it can be used in a microwave oven. Therefore, the high-temperature steam generated when cooking food lifts the valve section (a) where the steam discharge hole (2a) is formed by pressure, and the steam is discharged in the form of opening the steam discharge hole (2a). At this time, the valve section (2a) is opened. The adhesive section (b) formed on both sides of (a) remains adhered to the surface of the lead film (2), so that after the steam pressure is removed, the vapor discharge valve (2a) of the valve section (a) is connected to the lead film (2). 2) By re-adhering to the surface and sealing the vapor discharge hole (2a), the food contained inside the packaging container can be safely protected.

Through the configuration of the vapor discharge valve 100 as described above, the vapor discharge valve 100 in the form of a tape is attached entirely to the upper part of the vapor discharge hole 2a formed in the lid film 2. By installing 100), it is very easy to attach and does not require precise adjustment of the attachment position, which prevents production defects, and the adhesive section ( By b), the adhesion section (b) physically prevents the problem of the steam discharge valve 100 changing its position or not closing during the operation process, thereby ensuring stable operation of the steam discharge valve 100. .

Moreover, in the case of instant rice, which is a representative type of food that contains food in a packaging container, rice is placed inside the packaging container, a lid film (2) with a vapor discharge valve (100) is attached, and then the packaged food is subjected to a steam pressure sterilization process. Even if the steam discharge valve is opened by high-temperature steam during the steam sterilization process, when the steam is removed, the steam discharge hole (2a) is closed again by the adhesive force of the valve section (a), and the lead film or steam discharge valve (100) is closed. As the pressure inside the packaging container reaches a certain level due to moisture and steam generated from the food inside, even when cooking in a microwave oven for instant rice consumption, the vapor release valve formed on the lid film opens automatically. By discharging the vapor inside the packaging to the outside, the function of the vapor discharge valve can be performed stably.

In other words, the vapor discharge valve 100 attached to the lid film 2 has a thickness in the range of 30㎛ to 150㎛ during the high-temperature steam pressure sterilization process and is based on the composition of the base film 10 made of PET material. In the high-temperature steam pressure sterilization process, the portion of the lead film 2 to which the vapor release valve 100 is attached is maintained stably without deformation (without becoming wrinkled), thereby preventing the vapor release valve 100 from deforming the lead film. It has features that can physically prevent functional deterioration.

Moreover, the steam discharge valve 100 wound in the form of a tape can easily adjust the opening strength of the steam discharge hole 2a by adjusting the width.

That is, the width of the steam discharge valve 100 is narrowed to form a narrow surface that adheres to both edges of the steam discharge hole 2a so that the steam discharge hole 2a can be easily opened even at low pressure, or the steam discharge valve 2a is used By forming the width of (100) to be wide, the surface that adheres to the edge of the steam discharge hole (2a) is formed to be wide so that the steam discharge hole (2a) can be opened at high pressure, thereby controlling the width of the steam discharge valve (100). The steam discharge pressure can be easily adjusted through simple modifications.

Meanwhile, Figure 4 shows a state in which the tape-type vapor discharge valve 100 according to the present invention is attached around the vapor discharge hole 3a formed in the packaging paper 3. As shown, the vapor discharge hole 3a ) is formed on one side of the packaging and a vapor release valve 100 is attached to it, so that when food contained inside the packaging is consumed, the folded portion where the vapor release valve 100 is attached is removed and the packaging is transformed into a bag with one side open. It has the feature of allowing you to consume food contained in the packaging without a separate container.

Meanwhile, in the above description, the lid film (2) or wrapping paper (3) attached to the packaging container (1) is limited to the packaging material to which the vapor discharge valve is attached, but it is not limited thereto and various packaging materials for microwave ovens are used. It will include.

5 to 9 show another embodiment of a sticker-type vapor discharge valve for a microwave oven according to the present invention. A feature of this embodiment is that the vapor discharge valve attached to the lead film is formed in a single sheet, so that the vapor formed on the lead film is released. It is characterized by forming a vapor discharge valve 100 in a form that is attached to the position of the discharge hole 2a so that it can be used by attaching it to the lid film and wrapping paper of packaging containers of various shapes and forms.

That is, among the attached drawings, Figure 5 is a perspective view of a sticker-type steam discharge valve for a microwave oven according to a second embodiment of the present invention, and Figure 6 is a sticker-type steam discharge valve for a microwave oven according to a second embodiment of the present invention. It is a diagram showing the state in which the discharge valve is attached to the lid film of the ready-to-eat food packaging container, and Figure 7a is Figure 6 showing the state in which the vapor discharge valve for a sticker-type microwave oven according to the second embodiment of the present invention is attached to the packaging paper. is a cross-sectional view along line A-A, and Figure 7b is a cross-sectional view along line B-B of Figure 6 showing the sticker-type vapor discharge valve for a microwave oven according to the second embodiment of the present invention attached to the packaging, and Figure 8a is a cross-sectional view along line B-B of the present invention. Figure 6 is a cross-sectional view along the line A-A showing the steam discharge valve for a sticker-type microwave oven according to the second embodiment of the present invention in a state where it is opened by steam, and Figure 8b is a steam discharge valve for a sticker-type microwave oven according to the second embodiment of the present invention. Figure 6 is a cross-sectional view taken along line B-B showing the discharge valve opened by steam, and Figure 9 is a schematic diagram showing the external appearance of a sticker-type steam discharge valve for a microwave oven according to the second embodiment of the invention.

As shown, it is attached to the vapor discharge hole (2a) formed on one side of the lid film (2) of the packaging container (1) in which the contents are stored, and removes the high temperature generated inside the packaging container when cooking food using a microwave oven. The vapor discharge valve 200 according to the second embodiment of the present invention, which allows vapor to be discharged to the outside, includes a base film 10 having a thickness in the range of 30㎛ to 150㎛, and a lower part of the base film 10. An adhesive consisting of a low-adhesion layer 21 formed in a form that covers the vapor discharge hole 2a formed in the lead film 2, and a strong adhesive layer 22 formed on both sides of the low-adhesion layer 21. It includes a layer 20, where, when high-temperature steam is generated inside the packaging container 1, the low-adhesion layer 21 is opened by pressure to discharge the steam, and when the pressure is removed, the low-adhesion layer 21 returns to its original state. It is characterized by returning and sealing the steam discharge hole (2a) to block the inflow of external air.

In addition, the adhesive layer 20 can be adhered to the lower part to form a release film 30 in the form of a film so that the adhesive strength can be protected.

In addition, the width of the strong adhesive layer 22 and the low adhesive layer 21 that make up the adhesive layer 20 is divided into three equal widths of the entire adhesive layer, forming a low adhesive layer 21 in the center and strong adhesive layers on both sides. It may be configured to form the adhesive layer 22, but is not limited to this, and its width and length can be adjusted in various ways depending on the contents of the food contained inside the packaging container or packaging material. At this time, the adhesive strength is The low-adhesion layer 21 has an adhesive strength of 2 gf to 200 gf, and the high-adhesive layer 22 has an adhesive strength of 1,000 gf to 3,000 gf.

In addition, the base film 10 has a thickness in the range of 30㎛ to 150㎛, and a film selected from materials such as PET, PP, PE, or NY, EVOH with a gas barrier function is used, or It is composed of a film of the above material mixed with AL-Foil to block moisture, and in the process of discharging high-temperature steam, the surface of the lead film (2) to which the vapor discharge valve (100) is attached is exposed to high-temperature steam. By preventing deformation (wrinkling), the same opening and closing performance can always be maintained even if the steam discharge valve 100 is opened and closed several times.

In addition, the low-adhesion layer 21 is made by mixing saturated thermoplastic resin, oil, and additives at a certain ratio, or low specific gravity PE, metallocene, ethylene vinyl acetate copolymer (EVA), PB, EMA, EAA, It can be formed by mixing a certain amount of oil and additives with a self-adhesive resin selected from EMAA or EMMA or a rubber-based resin.

Additionally, the strong adhesive layer 22 may be formed by mixing additives at a certain ratio with an adhesive resin selected from acrylic resin, rubber resin, silicone resin, and butyl resin, or a mixture thereof.

The operating state of the sticker-type steam discharge valve for a microwave oven according to the present invention in the second embodiment configured as described above will be described in detail with reference to FIGS. 7A to 8B.

As shown, the low-adhesion layer 21 of the discharge valve 200 is adhered to the upper part of the lid film 2 where the vapor discharge hole 2a is formed in the longitudinal direction to seal the vapor discharge hole 2a. The strong adhesive layer 22 is adhered to the lead film 2 at both edges of the low-adhesive layer 21 to protect the internal low-adhesive layer 21. .

When the food is heated by placing the packaging container inside the food in a microwave oven with the steam discharge valve 200 installed as described above, the high-temperature steam generated as the food is heated is heated as shown in FIGS. 8A and 8B. The lead film (2) swells due to the pressure of steam, and at this time, the steam flows into the steam discharge hole (2a) to be discharged to the outside through the steam discharge hole (2a), and at the same time, the low-adhesion layer (21) is formed on both sides. The open space is limited by the strong adhesive layer 22 formed at the edge, and the portion where the steam discharge hole 2a is formed swells to form an open portion A connected to the outside, through which steam is discharged to the outside.

In addition, when the pressure of the vapor inside the packaging material is removed by the open portion (A) as described above, the swollen lead film (2) is stabilized, and the internal pressure is removed, and at the same time, the opened low-adhesion layer (21) is stabilized and vapor is discharged. By closing the open portion (A) in close contact with the outer peripheral surface of the ball (2a), it is possible to physically block external air from flowing into the lid film (2), thereby preventing contamination of the food contained in the packaging container (1) and the inflow of foreign matter. can be prevented.

On the other hand, the strong adhesive layer 10 forms a gel-type auxiliary strong adhesive layer (not shown) with self-adhesiveness on the bottom, and when used for packaging materials with a rough surface such as paper, the auxiliary strong adhesive layer 30 ) can ensure a stable adhesion state.

As described above, the sticker-type vapor release valve for a microwave oven according to the present invention prevents the generation of food inside the package when food is cooked by inserting a sealed food packaging container or package into the microwave oven. When the pressure inside the packaging reaches a certain level due to moisture and steam, one side of the adhesive packaging paper automatically opens and closes, and the vapor inside the packaging paper is automatically discharged to the outside, causing the packaging paper to be damaged by the internal pressure or the packaging container to be damaged. It has structural features that can prevent deformation due to pressure, damage to the microwave oven, or safety accidents.

In addition, the cost required to manufacture the steam release valve can be significantly reduced, so it can be applied to disposable packaging containers and packaging materials without increasing cost, and also performs the steam release function even if the attachment position of the steam release valve is not accurate. It can be easily applied to currently used automated packaging equipment lines, enabling quick and general use. Moreover, the water vapor generated from the contents during cooking is removed only to the extent that it can prevent deformation of the container. As it closes automatically, the moisture in the food being cooked remains almost intact, preventing deformation of the food or deterioration of taste as much as possible, thereby maintaining the good taste and texture.

In addition, the sticker-type steam release valve for a microwave oven according to the present invention is divided into an adhesive part that remains attached to the packaging container without any additional configuration modification and a valve part around the discharge hole, thereby facilitating the production and production of the steam release valve. It is easy to use and has the characteristic of being able to be put into the packaging equipment line without much modification.

In addition, the sticker-type vapor discharge valve for a microwave oven according to the present invention may be provided in the form of a single sticker depending on the type of packaging container or wrapping paper to be installed. When provided in the form of a single sticker, a strong adhesive layer is formed on both sides. As a result, it has the feature of being able to remain firmly attached to the packaging container or packaging paper while maintaining the vapor discharge function.

As described above, the optimal embodiment has been disclosed in the drawings and specification. Although specific terms are used here, they are used only for the purpose of describing the present invention and are not used to limit the meaning or limit the scope of the present invention described in the claims. Therefore, those skilled in the art will understand that various modifications and other equivalent embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the attached patent claims.

100, 200: Sticker type steam release valve for microwave oven
10: Base film
20: Adhesive layer 21: Low adhesion layer
22: Strong adhesive layer
30: Release film

Claims (5)

It is attached to the vapor discharge hole (2a) formed on the surface of the packaging material for microwave ovens to discharge steam generated during heating and cooking, so that high-temperature steam generated inside the packaging container when cooking food in a microwave oven is discharged to the outside. In the sticker type microwave vapor release valve 100,
The sticker type microwave steam discharge valve 200,
A base film 10 having a thickness ranging from 30 ㎛ to 150 ㎛,
It includes a low-adhesion layer (20) made of a mixture of saturated thermoplastic resin, oil, and additives at the lower part of the base film (10),
Here, the vapor discharge valve 100 is a sticker-type microwave oven, characterized in that the base film 10 with the low-adhesion layer 20 formed on the bottom is wound in the form of a tape, cut to fit the length of the packaging material, and attached. Steam release valve.
It is attached to the vapor discharge hole (2a) formed on the surface of the packaging material for microwave ovens to discharge steam generated during heating and cooking, so that high-temperature steam generated inside the packaging container when cooking food in a microwave oven is discharged to the outside. In the vapor discharge valve 200 for a sticker type microwave oven,
The sticker type microwave steam discharge valve 200,
A base film 10 having a thickness ranging from 30 ㎛ to 150 ㎛,
A low-adhesion layer 21 formed at the lower part of the base film 10 and covering the vapor discharge hole 2a formed in the packaging material and made of a mixture of saturated thermoplastic resin, oil, and additives, and the low-adhesion layer It includes an adhesive layer (20) composed of a strong adhesive layer (22) formed on both sides of (21),
Here, when high-temperature steam is generated inside the packaging material, the low-adhesion layer 21 is opened by pressure to discharge steam, and when the steam pressure is removed, the low-adhesion layer 21 returns to its original state and opens the steam discharge hole 2a. A sticker-type vapor release valve for a microwave oven that is sealed and blocks the inflow of external air.
According to claim 1 or 2,
The low-adhesion layer 21 is made of a resin or a rubber series resin having self-adhesiveness selected from low-specific gravity PE, metallocene, ethylene vinyl acetate copolymer (EVA), PB, EMA, EAA, EMAA, and EMMA. A sticker-type vapor release valve for a microwave oven, characterized by mixing oil and additives in a certain ratio.
According to claim 1 or 2,
The saturated thermoplastic resin is a sticker-type microwave oven steam, characterized in that it is a resin or a rubber-based resin having a self-adhesive strength selected from low specific gravity PE, metallocene, EVA, PB, EMA, EAA, EMAA, and EMMA. Discharge valve.
According to clause 2,
A sticker-type vapor release valve for a microwave oven, characterized in that the strong adhesive layer (22) is made of an adhesive resin selected from acrylic resin, rubber resin, silicone resin, and butyl resin, or a mixture thereof.