KR102654414B1 - Automated production of gas emission valves and emission valves for packaging containers - Google Patents

Abstract

The present invention relates to a gas discharge valve for a packaging container and an automated discharge valve production device. More specifically, the present invention relates to a gas discharge valve for a packaging container and an automatic discharge valve production device, which discharges the gas generated inside the sealed packaging container to the outside of the packaging container while external air flows into the packaging container. Not only can it prevent this, but the discharge valve is made of a single material, so the recycling rate can be expected to improve when the packaging container is disposed of. By using a synthetic resin film molding technique to laminate the valve film, it can be produced compared to existing injection products. A new type of gas discharge valve for packaging containers that can significantly reduce costs and at the same time fundamentally solve the problems of product defects and deterioration of airtightness due to errors in the smoothness of the functional cross section inside the valve during injection molding and production in a single process. This is about an automated production device for valves and discharge valves that enables continuous production in an automated manner through the system, thereby ensuring stable quality control and reducing production costs due to mass production.

Description

Automated production of gas emission valves and emission valves for packaging containers}

The present invention relates to a gas discharge valve for a packaging container and an automated discharge valve production device. More specifically, the present invention relates to a gas discharge valve for a packaging container and an automatic discharge valve production device, which discharges the gas generated inside the sealed packaging container to the outside of the packaging container while external air flows into the packaging container. Not only can it prevent this, but the discharge valve is made of a single material, so the recycling rate can be expected to improve when the packaging container is disposed of. By using a synthetic resin film molding technique to laminate the valve film, it can be produced compared to existing injection products. A new type of gas discharge valve for packaging containers that can significantly reduce costs and at the same time fundamentally solve the problems of product defects and deterioration of airtightness due to errors in the smoothness of the functional cross section inside the valve during injection molding and production in a single process. This is about an automated production device for valves and discharge valves that enables continuous production in an automated manner through the system, thereby ensuring stable quality control and reducing production costs due to mass production.

Generally, coffee beans, kimchi, soybean paste, red pepper paste, salted seafood, fruit wine, etc. are packaged and distributed in sealed containers. Processed foods such as snacks are also distributed packaged in airtight containers for long-term distribution. In addition, various industrial products are packaged and distributed in packaging containers such as plastic packs, cans, and box-shaped containers.

For example, fermented foods such as kimchi generate gas as the fermentation process progresses in a closed container, and in the case of coffee beans, CO2 gas is generated after the roasting process, causing deformation of the packaging and oxygen remaining inside. Destruction is progressing.

As described above, if gas generated from fermented food or coffee beans continues to accumulate, the pressure inside the container increases, which causes problems such as food leaking through the sealing part of the container or the container expanding and exploding.

In order to prevent this problem, a discharge valve is attached to the packaging container and has the functionality of discharging gas generated inside the container to the outside and blocking the inflow of external air.

The filter assembly for food packaging (registered on Patent No. 10-1946389 (registration date: January 31, 2019) as a prior art related to the discharge valve for discharging the above gas has a seating groove with a ventilation hole on one side. The main body has a wedge-shaped protruding ring on the other side and a triangular protruding ring with a triangular cross-section on the outside of the wedge-shaped protruding ring, and a triangular protrusion ring on one side so that a part of the wrapping paper can be inserted and fixed. A groove ring is formed, a fastening ring that is caught on the inside after the wedge-shaped protruding ring passes through, and a non-woven pad and a Teflon membrane attached to the seating groove so that the air inside the package passes through the ventilation hole but does not allow moisture to pass through. It is characterized in that it includes a filter including.

In another prior art, the cup lid, which facilitates internal gas discharge, is coupled to the upper end of the cup body and seals the cup body. , a cup lid that discharges gas remaining inside the cup body, is detachably coupled to the upper part of the cup body, has a distribution groove formed at one end, and includes an outlet hole formed through the distribution groove. A cover part, a sealing part protruding from the bottom of the cover part and coupled to the upper end of the cup body, and a discharge part coupled to the distribution groove and discharging gas inside the cup body to the outside. Do it as

However, in the discharge valve for removing the gas generated inside the packaging container of the above configuration, the main body or cover portion of the discharge valve is made of plastic molded products, so an injection mold is used to manufacture the components when manufacturing the discharge valve. As this must be accompanied, a lot of costs are incurred in manufacturing the discharge valve, and at the same time, the product defect rate increases due to the smoothness error of the functional cross section inside the injection molded valve, and the airtightness of the valve is reduced due to the smoothness error.

Moreover, when molding and manufacturing components, defects occur in the discharge hole for gas discharge or the surface of the main body or cover due to thickness deviation, which causes a problem in that the sealing force of the discharge valve decreases. This thickness deviation of the molded product is compensated for. In order to do so, thickness correction using oil and airtightness granting work are performed separately, and there is a problem in that it is exposed to secondary contamination and additional manufacturing costs are incurred.

In addition, there is a problem in that a separate process is required to injection mold each component of the gas discharge valve and assemble each molded component, which requires a lot of cost and manpower to manufacture the discharge valve.

In addition, packaging containers are provided in various materials and forms, such as plastic containers using synthetic resin or envelopes using film. Since the discharge valve is made of a different material from the packaging container, the discharge valve must be removed to recycle the packaging container. There is a problem in that the recycling rate of packaging containers decreases due to the inconvenience.

Registered Patent Publication No. 10-1946389 (registration date: January 31, 2019) “Filter assembly for food packaging” Publication of Patent No. 10-2021-0041771 (Publication date: April 16, 2021) “Cup lid that facilitates internal gas discharge”

The present invention was made in consideration of the above circumstances, and the purpose of the present invention is to prevent external air from flowing into the packaging container while discharging the gas generated inside the packaging container to the outside of the packaging container in a sealed state. In providing a gas discharge valve for a packaging container, the adhesion between the films can be improved through surface tension control technology through additives or surface treatment during film production on the film on the inner side of the discharge valve, thereby improving actual airtightness. The aim is to provide an improved type of gas discharge valve for packaging containers that can significantly reduce the production cost of the discharge valve.

Another object of the present invention is to produce a gas discharge valve for a film-type packaging container with the above characteristics, by enabling production of the discharge valve completed from the input of the fabric film through an automated system consisting of a single device, thereby enabling continuous production. The aim is to provide a new type of gas discharge valve production device for packaging containers that enables mass production and at the same time maintains the quality of the produced discharge valves uniformly, enabling stable mass production of discharge valves of excellent quality.

The object of the present invention described above is to provide a gas discharge valve for a packaging container that is attached to a hole formed on one side of a packaging container in which the contents are stored and allows only the gas inside the packaging material to be discharged to the outside. , a tray sheet in which the central part protrudes upward and is roughly in the shape of a donut, and has a receiving part and an opening part formed integrally with an adhesive part in the upper center and a plurality of gas inlet holes on the side, and a tray sheet that is attached to the upper part of the tray sheet and has a plurality of A first film in which two first through holes are formed and a low adhesion layer is formed on one side, and a second film in which a plurality of second through holes are formed in a position spaced apart from the first through holes and a release layer is formed on one side are laminated. It includes a valve film, where the gas generated inside the packaging container flows into the valve film through the gas inlet hole, and the pressure of the gas opens the gap between the low-adhesion layer and the release layer, opening the valve film and removing the pressure. This can be achieved by a gas discharge valve for a packaging container, which is characterized in that the space between the low-adhesion layer and the release layer is sealed and the valve film is closed.

The low-adhesion layer is characterized by being a silicone adhesive.

In another embodiment, the low-adhesion layer is characterized as being a resin having self-adhesiveness selected from low-specific gravity PE, metallocene, EVA, PB, EMA, EAA, EMAA, and EMMA.

In another embodiment, the low-adhesion layer is characterized by mixing PE or PP olefin resin with a plasticizer and an anti-fog material.

It is formed in the valve section between the first film and the second film and is a microporous nonwoven fabric with waterproof and breathable properties and further includes a functional nonwoven fabric made of microfiber nonwoven fabric made of high-density polyethylene (HDPE) manufactured by an explosion spinning method.

In the production equipment for the production of gas discharge valves for packaging containers, the automated production device for gas discharge valves for packaging containers includes a fabric film winding roller on which the film fabric of the trace sheet film (10) is mounted on one side and a completed discharge valve on the other side. A winding roller for the finished product is formed, which is formed on the moving path of the film and forms a molding part for forming a receiving part in the trace sheet film, a valve film winding roller through which the valve film flows, and a through hole for valve films 1 and 2. It is characterized by including a perforated part for bonding the trace sheet film and the valve film.

It is characterized in that it further includes a heater part formed in front of the molding part to heat the trace sheet film.

As described above, in the gas discharge valve for packaging containers according to the present invention, the trace sheet film and valve film constituting the discharge valve are made of a synthetic resin film, so processing of the film is easy. In particular, in the process of molding each film, the injection-molded material is easy to process. By using the smaller thickness deviation of the film than the surface thickness deviation, the occurrence of airtightness defects is fundamentally prevented, and the sealing force of the first and second films that make up the valve film can be stably maintained, which can be expected to substantially improve the airtightness of the discharge valve. It works.

In addition, the first film and second film constituting the gas discharge valve for the packaging container are selected from PETE, high-density polyethylene (HDPE), low-density polyethylene (LDPE), polypropylene (PP), and polystyrene (PS), which are the same as those of the packaging container. Since it is made of a single selected material, it can improve the recyclability of the packaging container, which has the effect of greatly improving the recycling rate of the packaging container.

In addition, the discharge valve has no difference between the front and back sides, so it can be used on both sides, thereby improving the productivity of the discharge valve and significantly reducing the rate of work defects that may occur during production, which can be expected to improve productivity and quality. There is an effect.

Moreover, since the discharge vane is made by stacking a plurality of films, the cumbersome work of assembling multiple components is unnecessary, making it easy to manufacture and significantly reducing manufacturing costs.

Meanwhile, the production equipment for producing the above-mentioned gas discharge valves for packaging containers can be produced in an automated manner by using a single device for processing the trace sheet film and adhesion of the valve film, enabling continuous mass production and simultaneously producing discharge valves. The quality can be maintained uniformly, which has the effect of stably mass producing excellent quality discharge valves.

1 is a perspective view of a gas discharge valve for a packaging container according to a first embodiment of the present invention.
Figure 2 is a cross-sectional view taken along line AA of Figure 1
Figure 3 is a schematic diagram showing the opening and closing form of the valve film among the gas discharge valves for packaging containers according to the first embodiment of the present invention.
Figure 4 is a schematic cross-sectional view of another embodiment of the valve film among the gas discharge valve for packaging containers according to the first embodiment of the present invention.
Figure 5 is a schematic diagram of an automated production device for gas discharge valves for packaging containers according to the first embodiment of the present invention.
6A to 6B are a perspective view and a cross-sectional view of part a of FIG. 5.
7A to 7B are a perspective view and a cross-sectional view of part b of FIG. 5.

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 indicate the existence of a combination, and should be understood as not precluding 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 gas discharge valve for packaging containers and the automated discharge valve production device according to the first embodiment of the present invention will be described in detail with reference to the drawings.

Among the attached drawings, FIG. 1 is a perspective view of a gas discharge valve for a packaging container according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1, and FIG. 3 is a gas discharge valve for a packaging container according to a first embodiment of the present invention. It is a schematic diagram showing the opening and closing form of the valve film among the gas discharge valves, Figure 4 is a schematic cross-sectional view of another embodiment of the valve film among the gas discharge valves for packaging containers according to the first embodiment of the present invention, and Figure 5 is a schematic cross-sectional view of another embodiment of the valve film among the gas discharge valves for packaging containers according to the first embodiment of the present invention. This is a schematic diagram of an automated production device for gas discharge valves for packaging containers according to an embodiment. FIGS. 6A to 6B are a perspective view and a cross-sectional view of part A of FIG. 5, and FIGS. 7A to 7B are a perspective view and a cross-sectional view of part B of FIG. 5.

The present invention relates to a gas discharge valve for a packaging container and an automated discharge valve production device. More specifically, the present invention relates to a gas discharge valve for a packaging container and a device for automatically producing the discharge valve, which discharges gas generated inside a sealed packaging container to the outside of the packaging container while external air flows into the packaging container. In addition to preventing this, the discharge valve is made of a single material, so the recycling rate can be expected to improve when the packaging container is disposed of, and it is produced by laminating it with the valve film using a synthetic resin film molding technique, compared to existing injection products. A new type of gas discharge valve for packaging containers that can significantly reduce costs and at the same time fundamentally solve the problems of product defects and reduced airtightness due to errors in the smoothness of the functional cross section inside the valve during injection molding and production in a single process. This is about an automated production device for valves and discharge valves that enables continuous production in an automated manner through a system, thereby ensuring stable quality control and reducing production costs due to mass production.

As shown, the gas discharge valve 100 for a packaging container according to the present invention includes a tray sheet film 10 having a receiving portion 11 inside and an opening portion 12 at the top in the form of a box as shown, and It consists of a valve film (20) that is adhered to the edge of the opening part (12) of the trace sheet film (10) and seals the receiving part (11) of the trace sheet film (10).

The trace sheet film 10 is composed of a sheet with a thickness ranging from approximately 300um to 1000um, and is made of the same material as the packaging container to ensure efficient recycling, including PET, high-density polyethylene (HDPE), and It can be made of a material selected from low-density polyethylene (LDPE), polypropylene (PP), and polystyrene (PS).

The receiving portion 11 has a central portion protruding upward and has an approximate donut shape, and an adhesive portion 14 at the upper central portion and a plurality of gas inlet holes 13 on the sides are integrally formed to use the valve film 20 later. In the process of bonding, the edges of the adhesive portion 14 and the trace sheet film 10 are bonded to stably maintain the shape of the receiving portion 11 and at the same time, the position of the gas inlet hole 13 can be formed in various ways.

Additionally, the receiving portion 11 can be formed to have various external shapes, such as circular, oval, or square shapes.

The valve film 20 includes a first film 23 in the form of a lead film in which a plurality of first through holes 21 are formed and a low-adhesion layer 22 is formed on one side, and a plurality of second through holes 24. It is formed by stacking a second film 26 in the form of a lead film with a release layer 25 formed on one side, and the portion between the low-adhesion layer 22 and the release layer 25 is closely adhered and adhered by pressure. The situation is formed to occur.

In addition, the first through hole 21 formed in the first film 23 and the second through hole 24 formed in the second film 26 are located at regular intervals and form a valve section A, which is the space between them. forms.
That is, in a state where one side of the second film 26 is adhered to the upper surface of the trace sheet film 10 and the receiving portion 11 is sealed, the gas generated inside the packaging container passes through the gas inlet hole 13 and enters the valve. The gas flows into the film 20, flows into the second through hole 24, and due to pressure, the gap between the low-adhesion layer 22 and the release layer 25 opens, the valve film 20 opens, and the pressure is removed. Afterwards, the space between the low-adhesion layer 22 and the release layer 25 is sealed and the valve film 20 is closed.

In addition, the first through hole 21 and the second through hole 24 are expressed as circular holes in the drawing, but are not limited thereto, and may be formed in various shapes such as a sheath-shaped "-" or "+". You can.

In addition, the low-adhesion layer 22 may be made of an adhesive made of silicone and is configured to have an adhesive strength of 1 gf to 200 gf, so that gas can be easily discharged to the outside according to the pressure inside the packaging material and can be removed after being removed by the internal pressure. The gel-type low-adhesion layer 22 is re-adhered to the release layer 25, thereby physically blocking the inflow of external air.

The low-adhesion layer 22 is formed of a resin having self-adhesiveness selected from low-specific gravity PE, ethylene vinyl acetate copolymer (EVA), PB, EMA, EAA, EMAA, and EMMA, or olefin of PE or PP. It can be made by mixing plasticizer and anti-fog material with resin.

Moreover, the low-adhesion layer 22 maintains a sticky state by adding low-molecular-weight polyisobutylene (PIB) to the inside, and at the same time, polyisobutylene (PIB) is released to the outside over time. Due to the transfer migration effect, the low-adhesion layer 20 continues to be maintained in a sticky gel form.

Additionally, the low-adhesion layer 22 may be made of low-molecular-weight oil or high-molecular oil that is added to food and is harmless to the human body.

That is, as shown in Figures 2 and 3, the second film 26 of the valve film 20 is seated and adhered to the upper surface of the trace sheet film 10, and the receiving part 11 is sealed in a sealed state. When gas is generated from the object contained in (11) and the internal pressure of the receiving part (11) increases, the gas releases the second film (26) through the second through hole (24) of the second film (26). It flows between the layer 25 and the low-adhesion layer 22 of the first film 23, and the valve section A between the release layer 25 and the low-adhesion layer 22 is separated by pressure, so that the gas flows into the first film 23. It moves toward the through hole (21) and is discharged outside the packaging container.

In addition, as described above, when the gas is discharged to the outside of the packaging container by pressure and the pressure is removed, the valve section (A) between the release layer 25 and the low-adhesion layer 22 is tightly closed and sealed, allowing external air to enter the packaging container. Physically blocks the inflow of internal waste.

In addition, the second through hole 24 of the valve film 20 is prevented from clogging by the trace sheet film 10 in close contact with the outer peripheral surface, and the gas inlet hole formed in the receiving portion 11 of the trace sheet film 10 The gas inside the packaging container flows in through (13), ensuring stable gas discharge without blockage.
In addition, the valve section (A), which is the space between the second through hole (24) and the first through hole (21), is in a form that adjusts the separation distance between the second through hole (24) and the first through hole (21). The discharged gas pressure can be adjusted by adjusting the valve section (A).
That is, when the separation distance between the second through hole 24 and the first through hole 21 is formed long, the valve section A is opened by high pressure and the second through hole 24 and the first through hole 21 are opened. ) If the separation distance is shortened, the valve section (A) can be opened even at low pressure.

Meanwhile, Figure 4 shows a modified example of the valve film 20. In this embodiment, it is formed on the adhesive surface of the first film 23 or the second film 26 bonded to the trace sheet film 10 and is waterproof. And a functional nonwoven fabric (27) made of microfiber nonwoven fabric made of high-density polyethylene (HDPE), a breathable microporous nonwoven fabric manufactured by the explosive spinning method, is formed in the valve section (A) to discharge the gas generated inside the packaging container to the outside. It has the feature of blocking the inflow of external air and at the same time blocking the discharge of moisture when the food contained inside the packaging container is a food such as kimchi, thereby physically preventing moisture from being exposed to the outside through the discharge valve.

In addition, the valve film 20 is produced as a series of multiple valve films 20 in the longitudinal direction, as shown in FIGS. 7A to 7B, and a gap is formed between the valve films to cut into unit valve films for smooth use. A partial cut line (28) is formed to enable both continuous use through an automated device or manual use using a unit valve film.

In addition, the gas discharge valve 100 for the packaging container is formed as a single piece by bonding the edges of the trace sheet film 10 and the valve film 20 using heat or ultrasonic waves, and the valve film 20 is attached to the inner surface of the packaging container. The edges are heat or ultrasonic bonded and installed.

Meanwhile, the gas discharge valve 100 for packaging containers according to the present invention configured as described above can be continuously produced by the discharge valve automated production device 200 comprised of one automation system.

As shown in Figure 5, the discharge valve automated production device 200 according to the present invention has a fabric film winding roller 210 on which the film fabric of the trace sheet film is mounted on one side and a completed discharge valve 100 is wound on the other side. A finished product winding roller 220 is formed, which is formed on the moving path of the film, a molding part 230 that forms the receiving part 11 on the trace sheet film 10, and a valve film 20 into which the valve film 20 flows. It consists of a valve film winding roller 240 and an adhesive part 250 that adheres the trace sheet film 10 and the valve film 20.

In addition, the fabric film flowing in from the fabric film winding roller 210 may further include a heater unit 260 for heating the surface of the fabric film for smooth forming of the receiving portion 11.

In the discharge valve automated production device 200 according to the present invention configured as described above, first, the trace sheet film 10 is introduced from the fabric film winding roller 210 and the trace sheet film 10 is formed by pressing in the molding unit 230. ) and form a receiving portion (11) and a gas inlet hole (13).

As described above, by molding using the trace sheet film 10, the production cost can be significantly reduced compared to the production of existing injection products, and at the same time, by layering the valve film using a molding technique of synthetic resin film, the valve can be used during injection molding. It has a feature that can fundamentally solve the problems of product defects and deterioration of airtightness caused by errors in the smoothness of the internal functional cross section.

On the other hand, the forming part 230 is formed by forming the receiving part by pressure molding using a plate-shaped press mold, or by continuously forming the receiving part 11 through a roll-shaped mold while the roll mold rotates, or by vacuum adsorption. It can be formed through known forming methods such as vacuum forming.

In addition, so that the molding of the receiving portion 11 can be performed more smoothly, a heater portion 260 is formed in front of the molding portion 230 to heat the trace sheet film 10, thereby enabling molding of the receiving portion 11. Make it happen more smoothly.

As described above, while the receiving portion 11 is molded on the trace sheet film 10, the valve film 20 flowing in from the valve film winding roller 240 formed at the top continues to move and forms on the upper surface of the trace sheet film 10. The valve film 20 is seated on the upper part of the receiving part 11 in close contact with the.

As described above, with the trace sheet film 10 and the valve film 20 in close contact, the edge portions of the trace sheet film 10 and the valve film 20 are thermally bonded and molded into one piece using a press method, thereby forming the discharge valve 100. ) is completed, and the production of the product is completed by winding it on the finished product winding roller 220.

In addition, in the process of winding the discharge valve 100, a partial cut line 28 is formed between the valve films to enable both continuous use through an automated device or manual use using a unit valve film.

As described above, in the gas discharge valve for packaging containers according to the present invention, the trace sheet film and valve film constituting the discharge valve are made of a synthetic resin film, so processing of the film is easy. In particular, in the process of forming each film, the burr is removed. By fundamentally preventing the occurrence, the sealing force of the first and second films that make up the valve film can be stably maintained, which has a structural feature that can be expected to substantially improve the airtightness of the discharge valve. In particular, the gas discharge valve for packaging containers is expected to be improved. The first and second films are made of the same material as the packaging container: PET, high-density polyethylene (HDPE), low-density polyethylene (LDPE), polypropylene (PP), and polystyrene (PS). It has a feature that can greatly improve the recycling rate of packaging containers by improving the recyclability of packaging containers.

In addition, the discharge valve has no difference between the front and back sides, so it can be used on both sides, thereby improving the productivity of the discharge valve and significantly reducing the rate of work defects that may occur during production, which can be expected to improve productivity and quality. There is a characteristic.

Meanwhile, the production equipment for producing the above-mentioned gas discharge valves for packaging containers can be produced in an automated manner by using a single device for processing the trace sheet film and adhesion of the valve film, enabling continuous mass production and simultaneously producing discharge valves. It has the feature of being able to stably mass-produce discharge valves of excellent quality by maintaining uniform quality.

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: Gas discharge valve for packaging container
10: trace sheet film 11: receiving part
12: opening 13: gas inlet hole
14: Adhesive part
20: valve film 21: first through hole
22: low adhesion layer 23: first film
24: second through hole 25: release layer
26: second film 27: functional nonwoven fabric
28: Partial incision line
200: Discharge valve automated production device
210: Fabric film winding roller 220: Finished product winding roller
230: Molded part 240: Valve film winding roller
250: adhesive part 260: heater part

Claims (9)

In the gas discharge valve 100 for a packaging container that is attached around the hole formed on one side of the packaging container in which the contents are stored and allows only the gas inside the packaging material to be discharged to the outside,
The gas discharge valve 100 for a packaging container includes a tray sheet film 10 in which a receiving portion 11 and an opening portion 12 having a plurality of gas inlet holes 13 formed on the side thereof are integrally formed,
A second film 26 that is adhered to the upper part of the trace sheet film 10 and has a plurality of second through holes 24 formed thereon and a release layer 25 is formed on one side, the second through holes 24, and A plurality of first through holes 21 are formed at spaced apart positions, a first film 23 having a low-adhesion layer 22 in close contact with the release layer 25 is formed on one side, and the first through holes 21 are formed. It includes a valve film (20) made of a lead film that is spaced apart from the second through hole (24) and constitutes a valve section (A), which is the space between them,
Here, in a state where one side of the second film 26 is adhered to the upper surface of the trace sheet film 10 and the receiving portion 11 is sealed, the gas generated inside the packaging container passes through the gas inlet hole 13 and enters the valve. The gas flows into the film 20, flows into the second through hole 24, and due to pressure, the gap between the low-adhesion layer 22 and the release layer 25 opens, the valve film 20 opens, and the pressure is removed. A gas discharge valve for a packaging container, characterized in that the space between the low-adhesion layer 22 and the release layer 25 is sealed and the valve film 20 is closed.
According to paragraph 1,
A gas discharge valve for a packaging container, wherein the low-adhesion layer (22) is made of silicone adhesive.
According to paragraph 1,
The low-adhesion layer (22) is a gas discharge valve for packaging containers, characterized in that the resin having self-adhesiveness selected from low specific gravity PE, EVA, PB, EMA, EAA, EMAA, and EMMA.
According to clause 1,
The low-adhesion layer (22) is a gas discharge valve for packaging containers, characterized in that the low-adhesion layer (22) is composed of PE or PP olefin resin mixed with a plasticizer and an anti-fog material.
According to clause 1,
The low-adhesion layer (22) is a gas discharge valve for packaging containers, characterized in that it is made of low-molecular oil or high-molecular oil that is harmless to the human body and is used as a food additive.
According to paragraph 1,
It is attached to one side of the valve section (A) of the second film (26) and further includes a functional nonwoven fabric (27) made of a microfiber nonwoven fabric made of high-density polyethylene (HDPE) manufactured by an explosion spinning method as a microporous nonwoven fabric with waterproofing and breathability. A gas discharge valve for packaging containers, characterized in that.
In the production equipment for producing the gas discharge valve for packaging containers of claim 1,
The automated production device 200 for gas discharge valves for packaging containers includes a fabric film winding roller 210 on which the film fabric of the trace sheet film 10 is placed on one side and a finished product winding roller on which the finished discharge valve 100 is wound on the other side. (220) is formed, and a molding part 230 is formed on the movement path of the trace sheet film 10 and forms the receiving part 11 in the trace sheet film 10, and the valve film 20 flows in. An automated production device for gas discharge valves for packaging containers, comprising a valve film winding roller (240) and an adhesive portion (250) for bonding the trace sheet film (10) and the valve film (20).
According to clause 7,
An automated production device for gas discharge valves for packaging containers, further comprising a heater unit 260 formed in front of the molding unit 230 to heat the trace sheet film 10.
According to clause 7,
An automated production device for gas discharge valves for packaging containers, characterized in that the molding part 230 is formed through a method selected from a pressure molding method using a press or a vacuum molding method through vacuum adsorption.