JP6954662B2 - Degassing valve, housing and adhesive sheet - Google Patents

Description

The present invention relates to a degassing valve, an accommodating body including the degassing valve, and an adhesive sheet including the degassing valve.

Conventionally, fermented foods such as coffee beans, miso, and kimchi have been distributed as packaging materials. The package in which the fermented food is packaged is provided with a vent for discharging the gas generated from the fermented food to the outside of the package, and a gas vent valve is attached so as to cover the vent. ing. The degassing valve opens when the pressure inside the package increases due to the gas generated from the fermented food, and the gas is released to the outer region of the package. Then, after the gas is released, the valve is closed to prevent oxygen from flowing into the package from the external region. This suppresses the deterioration of the quality of fermented foods.

As such a gas vent valve, for example, in Patent Document 1, the valve seat film in which at least one valve hole is formed, the valve plate film arranged to face the valve seat film, and the valve hole are not blocked. A degassing valve including a first solid seal layer fixed to the valve seat film and a second solid seal layer fixed to the valve plate film and arranged to face the first solid seal layer. Is disclosed. In the gas vent valve of Patent Document 1, when the pressure inside the package exceeds a predetermined pressure, that is, the valve opening pressure, the valve plate film moves in a direction away from the valve seat film, and the first solid seal layer A ventilation path is formed between the second solid seal layer and the second solid seal layer, and the valve is opened. Then, when the pressure inside the package falls below the valve opening pressure, the valve plate film moves in the direction approaching the valve seat film, so that at least the first solid seal layer and the second solid seal layer are formed. A part of the valve is in close contact and the valve is closed. In the gas vent valve of Patent Document 1, the first solid seal layer is composed of a plurality of ridges extending in a direction intersecting the gas ventilation direction and separated from each other.

JP-A-2018-2248

In the gas vent valve of Patent Document 1, the valve opening pressure can be adjusted to the optimum range by adjusting the number of ridges in the first solid seal layer. However, if the number of ridges is reduced in order to reduce the valve opening pressure, oxygen tends to flow into the package from the external region, and as a result, the quality of gas products (for example, fermented food) in the package is improved. There was a problem of lowering. Further, if the number of the ridges is reduced, there is a problem that the gas generated in the package is likely to be scattered to the external region.

The present invention has been made in view of the above circumstances, and is a gas vent valve which is excellent in blocking property from an external region and can prevent a gas generating substance from being scattered in an external region in the package. An object of the present invention is to provide an accommodating body provided with a degassing valve and an adhesive sheet provided with the degassing valve.

The gas vent valve according to the present invention is a gas vent valve including a valve plate film and a valve seat film laminated on one side of the valve plate film to form a valve hole, and the valve seat film and the valve seat film are described. A solid seal layer fixed to the valve seat film is provided between the valve plate film and the valve hole so as not to block the valve hole, and the valve plate film moves away from the valve seat film to move the valve. The valve plate is opened by forming a ventilation path along the gas ventilation direction between the plate film and the solid seal layer, and the valve plate film moves in a direction approaching the valve seat film. It has a valve body portion that can switch between a closed state in which the film and the solid seal layer are in close contact with each other, and the solid seal layer extends from a plurality of ridges extending in a plurality of directions and intersecting each other. Therefore, it is formed in an oblique lattice shape or a honeycomb shape when viewed from the stacking direction.

A conventional degassing valve is composed of a plurality of ridges in which a solid seal layer extends in a direction intersecting the gas ventilation direction and is separated from each other. As a result, in the conventional gas vent valve, in the valve open state, a substantially linear ventilation path is formed so as to intersect the ridge portion along the ventilation direction when viewed from the stacking direction. Therefore, when the number of ridges formed is small, oxygen easily flows into the package from the external region, and gas products in the package tend to scatter to the external region.

On the other hand, in the gas vent valve according to the present invention, the solid seal layer is composed of a plurality of ridges extending in a plurality of directions intersecting the ventilation direction and intersecting each other, and has an oblique lattice shape or a honeycomb shape when viewed from the stacking direction. Is formed in. As a result, in the gas vent valve, in the valve open state, a wavy ventilation path is formed so as to intersect the ridge portion along the ventilation direction when viewed from the stacking method. Therefore, it becomes difficult for the gas to be ventilated as compared with the case where a substantially linear air passage is formed along the ventilation direction. As a result, even if the number of ridges formed is small, oxygen does not easily flow into the package from the external region, and the blocking property is excellent. Further, since the gas generated in the package also becomes difficult to pass through the ventilation passage, it is possible to prevent the gas generated from scattering to the outer region.

In the gas vent valve according to the present invention, the width of the ridge portion may be 0.08 mm or more and 1.0 mm or less.

With such a configuration, the degassing valve is more excellent in blocking property from the external region and further prevents the gas generated in the package from being scattered to the external region.

In the gas vent valve according to the present invention, the distance between the ridges facing each other when viewed from the stacking direction may be 0.2 mm or more and 2.0 mm or less.

With such a configuration, the degassing valve is more excellent in blocking property from the external region and further prevents the gas generated in the package from being scattered to the external region.

The gas vent valve according to the present invention is further arranged continuously with respect to the valve main body portion in a direction intersecting the ventilation direction, and has a fixing portion in which the valve seat film and the valve plate film are fixed. However, the fixing portion may include a plurality of embossed portions formed on the surface of the other side of the valve plate film.

The embossed portion functions as a spacer for preventing the degassing valve from being crushed by external pressure during transportation and storage. As a result, the degassing valve can be smoothly opened.

The degassing valve according to the present invention may further include a release agent layer between the solid seal layer located at least on the valve hole side and the valve plate film.

With such a configuration, the solid seal layer and the valve plate film can be easily peeled off, so that the gas in the package can be quickly released to the outside.

The degassing valve according to the present invention may further include an adhesive layer fixed to one surface of the valve seat film, and may be attached to the surface of the package via the adhesive layer.

With such a configuration, the degassing valve can be easily fixed to the surface of the package.

The housing according to the present invention includes a gas generating material and a packaging body including a packaging material for packaging the gas generating material, and the above-mentioned gas vent valve attached to the packaging body.

By providing the above-mentioned degassing valve, the accommodating body can suppress deterioration of the quality of the gas generating product.

The adhesive sheet according to the present invention includes one or more of the above-mentioned gas vent valves.

With such a configuration, the degassing valve can be easily moved and transported to another place. In addition, the gas vent valve can be easily attached to the package by automating with a sticking device or the like.

According to the present invention, a degassing valve which is excellent in blocking property from an external region and can prevent a gas generating substance from scattering to an external region in the package, an accommodating body provided with the degassing valve, and an accommodating body provided with the degassing valve. , An adhesive sheet provided with the degassing valve can be provided.

FIG. 1 is a plan view of the gas vent valve 1 according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view of the degassing valve 1 shown in FIG. 1 in a cross section taken along line II-II. FIG. 3 is a partially enlarged end view showing the valve opening state A of the valve body portion 14 shown in FIG. FIG. 4 is a plan view of the gas vent valve 1 according to the second embodiment of the present invention.

[First Embodiment]
<Gas vent valve>
Hereinafter, the degassing valve 1 according to the first embodiment of the present invention will be described with reference to the drawings. In the following drawings, the same or corresponding parts are designated by the same reference numerals, and the description thereof will not be repeated.

FIG. 1 is a plan view of the degassing valve 1 according to the first embodiment of the present invention, and FIG. 2 is a cross-sectional view of the degassing valve 1 shown in FIG. 1 in a cross section taken along line II-II. As shown in FIG. 2, the degassing valve 1 is laminated on the valve plate film 2 and one side of the valve plate film 2 (bottom side in the Z direction in FIG. 2) to form a valve hole 3. The film 4 and the like are provided. More specifically, the valve seat film 4 has an inner peripheral edge portion 9 forming the valve hole 3, that is, the valve hole 3 is formed by the inner peripheral edge portion 9. One valve hole 3 is formed in the central region of the valve seat film 4. In the present specification, the direction in which the valve plate film 2 and the valve seat film 4 are laminated is referred to as a "lamination direction".

The valve plate film 2 and the valve seat film 4 are formed of a deformable film so as to be able to follow the deformation of the package. As the valve plate film 2 and the valve seat film 4, for example, a non-adhesive flexible resin film can be used. Examples of the non-adhesive flexible resin film include a resin film made of polyethylene tereflatate, polyolefin, and the like. The valve plate film 2 and the valve seat film 4 are preferably formed of a resin film having the same material and shape. As a result, it is possible to prevent the valve opening pressure from changing due to the difference in heat shrinkage between the two films and the peeling of the fixing portion 6 described later. The thickness of the valve plate film 2 and the valve seat film 4 is preferably 12 μm or more and 200 μm or less, and more preferably 16 μm or more and 100 μm or less, respectively.

As shown in FIG. 2, the degassing valve 1 further includes a primer layer 13 fixed to one side of the valve plate film 2 in the stacking direction (bottom side in the Z direction in FIG. 2). The primer layer 13 is provided to improve the adhesion between the valve plate film 2 and the solid seal layer 5 described later. The primer layer 13 is preferably non-adhesive. Examples of the non-adhesive primer layer 13 include a layer made of a smooth UV curable resin or the like. Examples of such a UV curable resin include a monomer / oligomer having an acrylate group, a mixture of the monomer / oligomer and a thermoplastic polymer, and the like. The thickness of the primer layer 13 is preferably 1 μm or more and 10 μm or less.

As shown in FIG. 2, the degassing valve 1 further includes an adhesive layer 12 fixed to one side of the valve seat film 4 in the stacking direction (bottom side in the Z direction in FIG. 2). The degassing valve 1 can be attached to the surface of the package via the adhesive layer 12. The adhesive layer 12 includes, for example, a layer made of known pressure-sensitive adhesives such as rubber-based pressure-sensitive adhesives, acrylic-based pressure-sensitive adhesives, and silicone-based pressure-sensitive adhesives, EVA-based emulsion-type adhesives, synthetic rubber-based adhesives, and cyanoacrylate-based adhesives. Examples thereof include a layer made of a known adhesive such as. The thickness of the adhesive layer 12 is preferably 10 μm or more and 50 μm or less, and more preferably 15 μm or more and 25 μm or less.

The adhesive layer 12 is formed so that the peel strength of the adhesive layer 12 with respect to the packaging material is greater than the peel strength between the solid seal layer 5 and the primer layer 13, which will be described later. As a result, when the valve is opened, the ventilation path P can be formed between the solid seal layer 5 and the primer layer 13 without forming an unintended ventilation path between the adhesive layer 12 and the package. ..

As shown in FIG. 1, the degassing valve 1 is a fixed portion that is continuously arranged in a direction intersecting the valve main body portion 14 and the ventilation direction (Y direction in FIG. 1) with respect to the valve main body portion 14. 6 and. Specifically, the fixing portions 6 are continuously arranged on both end sides in a direction orthogonal to the ventilation direction (X direction in FIG. 1) with respect to the valve main body portion 14. The width W of the valve body 14, that is, the length along the direction orthogonal to the ventilation direction is preferably 4 mm or more and 18 mm or less, and more preferably 6 mm or more and 16 mm or less.

As shown in FIGS. 1 and 2, the valve body 14 is a solid seal layer 5 fixed to the valve seat film 4 so as not to block the valve hole 3 between the valve plate film 2 and the valve seat film 4. It has. In the solid seal layer 5, the surface opposite to the surface to which the valve seat film 4 is fixed is in close contact with the primer layer 13 so as to be peelable. The solid seal layer 5 is composed of a plurality of ridges 51 extending in a plurality of directions and intersecting each other, and is formed in an oblique lattice pattern when viewed from the stacking direction. In addition, in this specification, the diagonal grid shape means the grid shape formed along the diagonal direction with respect to the ventilation direction. As shown in FIG. 1, in the solid seal layer 5, rectangular spaces are parallel to each other along the direction of intersection at an angle of 45 ° with respect to the ventilation direction, that is, diamond-shaped spaces are parallel to each other along the ventilation direction. A plurality of ridges 51 intersect.

The width of the ridge portion 51 is preferably 0.08 mm or more and 1.0 mm or less, and more preferably 0.1 mm or more and 0.8 mm or less. The width of the ridge portion 51 may be larger than the design value depending on the thickness of the ink during the printing process. Therefore, it is preferable that the width of the ridge portion 51 is designed to be, for example, 0.05 mm or more and 0.7 mm or less so as to be within the above-mentioned range in consideration of the ink thickness.

The distance D between the ridges 51 facing each other when viewed from the stacking direction is preferably 0.2 mm or more and 2.0 mm or less, and more preferably 0.5 mm or more and 1.5 mm or less. The distance D may be smaller than the design value depending on the thickness of the ink during the printing process. Therefore, it is preferable that the distance D is designed to be, for example, 0.6 mm or more and 2.3 mm or less so as to be within the above-mentioned range in consideration of the ink thickness. The distance D is the shortest distance between two opposing sides in a rectangular space formed by a plurality of ridges 51.

Examples of the solid seal layer 5 include a layer made of a self-adsorptive UV curable resin or the like. Among these, the solid seal layer 5 is preferably a UV curable resin capable of controlling the self-adsorption force from the viewpoint of reducing the valve opening pressure. Examples of such a UV curable resin include a silicone-based monomer / oligomer having an acrylate group, a long-chain alkyl-based monomer / oligomer having an acrylate group, or a mixture of these monomer / oligomer and a thermoplastic polymer. And so on. As the solid seal layer 5, a layer made of one kind of material may be used, or a layer made of a mixture of two or more kinds of materials may be used. The thickness of the solid seal layer 5 is preferably 1 μm or more and 15 μm or less.

As shown in FIG. 2, the valve body 14 further includes a release agent layer 11 between the solid seal layer 5 located at least on the valve hole 3 side and the valve plate film 2. Specifically, the release agent layer 11 is provided so as to cover the valve hole 3 when viewed from the stacking direction. The release agent layer 11 has an end portion in the ventilation direction on one side in the stacking direction (bottom side in the Z direction in FIG. 2) in close contact with the ridge portion 51 of the solid seal layer 5. On the other hand, the release agent layer 11 has the other side in the stacking direction (the top side in the Z direction in FIG. 2) fixed to the primer layer 13 over the entire surface. Examples of the release agent layer 11 include a layer made of a UV curable resin or the like having a release property. Examples of such a UV curable resin include a silicone-based monomer / oligomer having an acrylate group, a long-chain alkyl-based monomer / oligomer having an acrylate group, or a mixture of these monomer / oligomer and a thermoplastic polymer. And so on. The thickness of the release agent layer 11 is preferably 1 μm or more and 10 μm or less.

In the valve body 14, the valve plate film 2 moves away from the valve seat film 4, so that a ventilation path P along the gas ventilation direction is formed between the valve plate film 2 and the solid seal layer 5. It is possible to switch between the valve opening state A to be performed and the valve closing state B in which the valve plate film 2 and the solid seal layer 5 are in close contact with each other by moving the valve plate film 2 in the direction approaching the valve seat film 4. Will be done. FIG. 2 is a cross-sectional view showing a valve closed state B of the valve main body portion 14. On the other hand, FIG. 3 is a partially enlarged end view showing the valve open state A of the valve body portion 14 shown in FIG.

Specifically, the valve closed state B is a state in which the degassing valve 1 is sealed when at least a part of the solid seal layer 5 and the primer layer 13 are in close contact with each other. That is, in the valve closed state B, the gas in the package is not released to the external region, and the inflow of oxygen from the external region into the package is suppressed. In the valve closed state B, when the internal pressure in the package exceeds a predetermined pressure, that is, the valve opening pressure, the valve plate film 2 moves in the direction away from the valve seat film 4, and the valve closed state B changes to the valve opening state A. do.

The valve open state A is a state in which at least a part of the solid seal layer 5 and the primer layer 13 is separated and a ventilation path P is formed between the solid seal layer 5 and the primer layer 13. That is, in the valve open state A, the gas in the package is released to the external region. When the internal pressure inside the package falls below a predetermined pressure, that is, the valve opening pressure in the valve opening state A, the valve plate film 2 moves in the direction approaching the valve seat film 4, so that the valve plate film 2 and the solid seal layer 5 Is in close contact and returns to the valve closed state B. As a result, the gas vent valve 1 functions as a check valve whose ventilation direction is the direction from the valve hole 3 through between the solid seal layer 5 and the primer layer 13 toward the external region.

The valve opening pressure is preferably a pressure exceeding atmospheric pressure and not more than the burst strength of the packaging material (JIS-P-8112 Murren method). In order for the degassing valve 1 to open at a pressure as small as the pressure of the gas generated from the gas generator, it is preferable that the valve opening pressure is close to atmospheric pressure. Specifically, the valve opening pressure, it is more preferably preferably, 1.0 kgf / cm ² or more 1.5 kgf / cm ² or less is 1.0 kgf / cm ² or more 2.0 kgf / cm ² or less ..

At the fixing portion 6, the valve plate film 2 and the valve seat film 4 are fixed. Specifically, in the fixing portion 6, the valve plate film 2 and the valve seat film 4 are fixed via the primer layer 13. As shown in FIGS. 1 and 2, the fixing portion 6 has a plurality of embossed portions 7 formed on the surface of the valve plate film 2 on the other side (top side in the Z direction) of the stacking direction. Specifically, four circular embossed portions 7 are linearly arranged at equal intervals in each of the fixed portions 6. The embossed portion 7 functions as a spacer for preventing the gas vent valve 1 from being crushed by external pressure during transportation or storage, so that the gas vent valve 1 can be smoothly opened.

In the gas vent valve 1 according to the present embodiment, the solid seal layer 5 is composed of a plurality of ridges 51 extending in a plurality of directions and intersecting each other, and is formed in an oblique lattice shape when viewed from the stacking direction. As a result, in the gas vent valve 1, in the valve open state A, a wavy ventilation path P is formed so as to intersect the ridge portion 51 along the ventilation direction when viewed from the stacking direction. Therefore, it becomes difficult for the gas to be ventilated as compared with the case where a substantially linear ventilation path is formed along the ventilation direction as in the conventional gas vent valve. As a result, even if the number of ridges 51 formed is small, oxygen does not easily flow into the package from the external region, and the blocking property is excellent. Further, since the gas generated in the package also becomes difficult to pass through the ventilation passage P, it is possible to prevent the gas generated from scattering to the outer region.

In the gas vent valve 1 according to the present embodiment, the width of the ridge portion 51 is preferably 0.08 mm or more and 1.0 mm or less. With such a configuration, the gas vent valve 1 is more excellent in blocking property from the external region, and further prevents the gas generated in the package from being scattered to the external region.

In the gas vent valve 1 according to the present embodiment, the distance D between the ridges 51 facing each other when viewed from the stacking direction is preferably 0.2 mm or more and 2.0 mm or less. With such a configuration, the gas vent valve 1 is more excellent in blocking property from the external region, and further prevents the gas generated in the package from being scattered to the external region.

The degassing valve 1 according to the present embodiment is further arranged continuously with respect to the valve main body portion 14 in a direction intersecting the ventilation direction, and the fixing portion 6 in which the valve seat film 4 and the valve plate film 2 are fixed. The fixing portion 6 includes a plurality of embossed portions 7 formed on the surface of the valve plate film 2 on the other side. The embossed portion 7 functions as a spacer for preventing the degassing valve from being crushed by external pressure during transportation and storage. As a result, the degassing valve 1 can be smoothly opened.

In the gas vent valve 1 according to the present embodiment, the valve body portion 14 is further located between the solid seal layer 5 located at least on the valve hole 3 side and the valve plate film 2 (primer layer 13 in the present embodiment). The release agent layer 11 is provided. With such a configuration, in the gas vent valve 1, the solid seal layer 5 and the valve plate film 2 (primer layer 13 in this embodiment) are easily peeled off on the valve hole 3 side, so that the gas in the package can be quickly removed. It can be released to the outside.

The gas vent valve 1 according to the present embodiment further includes an adhesive layer 12 fixed to one surface of the valve seat film 4 in the stacking direction, and is attached to the surface of the package via the adhesive layer 12. There is. With such a configuration, the degassing valve 1 can be easily fixed to the surface of the package.

Subsequently, an example of the manufacturing method of the gas vent valve 1 according to the present embodiment will be described.

First, the solid seal layer 5 is formed on the surface of the valve seat film 4 that forms the valve hole 3. Specifically, the material to be the solid seal layer 5 is printed and then cured in a predetermined pattern in which the region where the valve hole 3 is formed and the region where the ridge portion 51 is not formed are masked. The pattern may also mask the region that becomes the fixing portion 6. Examples of the printing method include known printing methods such as gravure printing, offset printing, flexographic printing, and inkjet printing. Curing can be carried out by performing ultraviolet irradiation, heating, or the like according to the curing conditions of the material to be the solid seal layer 5. The adhesive layer 12 may already be laminated on the valve seat film 4.

Next, the primer layer 13 is formed on the surface of the valve plate film 2 via the pressure-sensitive adhesive layer, and the release agent layer 11 is further formed on the surface of the primer layer 13. Specifically, after applying an adhesive to the surface of the valve plate film 2, a UV curable resin to be a primer layer 13 is applied and cured by ultraviolet irradiation to form a primer layer 13. Subsequently, a UV curable resin to be the release agent layer 11 is applied and cured by ultraviolet irradiation to form the release agent layer 11.

Subsequently, the valve plate film 2 and the valve seat film 4 are arranged so that the solid seal layer 5 and the primer layer 13 face each other, and the primer layer 13 and the valve seat are arranged along the pair of side edges of the degassing valve 1. The fixed portion 6 is formed by fixing the film 4 to the film 4. Next, two dies, a male die (convex) and a female die (concave), are used and heat-pressed from above and below to form an embossed portion 7 on the fixed portion 6. Thereby, the degassing valve 1 can be manufactured.

<Container>
Next, the housing according to the present embodiment will be described. The housing according to the present embodiment includes a gas generating material and a packaging body including a packaging material for packaging the gas generating material, and the above-mentioned gas vent valve 1 attached to the packaging body. The housing may be provided with a lid so as to cover at least a part of the surface of the package to which the degassing valve 1 is attached. By providing a slight gap between the lid and the package, the gas released from the gas vent valve 1 can be discharged to the outer region of the lid.

Examples of the gas-generating product include coffee beans, heated coffee, tea beverages such as black tea and tea, fermented foods such as miso, kimchi, cheese, and work laut, gas-generating foods such as detergents that generate gas, and gas. Examples include generated chemical products.

The packaging material is provided with through holes for releasing gas inside the packaging. The degassing valve 1 is attached to the package so that the hole and the valve hole 3 communicate with each other. A gas vent valve 1 is attached to the package via the adhesive layer 12.

As the packaging material, for example, a material containing a resin, which is molded into a bag shape, a container shape, or the like can be used.

By providing the above-mentioned gas vent valve 1 in the containing body, it is possible to suppress deterioration in the quality of the gas generating product.

<Adhesive sheet>
The adhesive sheet according to the present embodiment includes one or more of the above-mentioned gas vent valves 1. The adhesive sheet includes one or more degassing valves 1 and a release sheet. The degassing valve 1 is fixed to the release sheet via the adhesive layer 12. At the time of use, the release sheet can be peeled off, the degassing valve 1 can be separated from the adhesive sheet to expose the adhesive layer 12, and then the degassing valve 1 can be fixed to the package. As a result, the degassing valve 1 can be easily moved and transported to another place, and the degassing valve 1 can be easily attached to the package by automating with a sticking device or the like.

[Second Embodiment]
Hereinafter, the gas vent valve 1 according to the second embodiment of the present invention will be described with reference to the drawings in a portion different from that of the first embodiment. In the following drawings, the same or corresponding parts are designated by the same reference numerals, and the description thereof will not be repeated.

FIG. 4 is a plan view of the gas vent valve 1 according to the second embodiment of the present invention. As shown in FIG. 4, the solid seal layer 5 is composed of a plurality of ridges 51 extending in a plurality of directions and intersecting each other, and is formed in a honeycomb shape when viewed from the stacking direction. Specifically, in the solid seal layer 5, a hexagonal space is formed by two ridges extending in the ventilation direction and two ridges intersecting the ventilation direction and extending in two different directions. ing. The plurality of ridges 51 are formed so that the hexagonal spaces are parallel to each other.

[Other Embodiments]
Although the first embodiment and the second embodiment of the present invention (hereinafter, both embodiments are collectively referred to as the present embodiment) have been described above, the present invention is not limited to the present embodiment, and the present invention is not limited to the present embodiment. Various changes can be made without departing from the gist of.

In the degassing valve 1 according to the present embodiment, one valve hole 3 is formed in the central region of the valve seat film 4. However, the present invention is not limited to this configuration, and a plurality of valve holes 3 may be formed, or the valve holes 3 may be formed in a region biased toward the side edge of the valve seat film 4. good.

In the gas vent valve 1 according to the present embodiment, the primer layer 13 is fixed to one side of the valve plate film 2 in the stacking direction. However, the present invention is not limited to this configuration, and the primer layer 13 may not be provided. That is, the valve plate film 2 and the solid seal layer 5 may be directly adhered to each other in the valve body portion 14, and the valve plate film 2 and the valve seat film 4 may be directly adhered to each other in the fixing portion 6. Further, the primer layer 13 may be provided between the valve seat film 4 and the solid seal layer 5. Thereby, the adhesion between the valve seat film 4 and the solid seal layer 5 can be improved.

In the gas vent valve 1 according to the present embodiment, the ridge portion 51 is formed in a strip shape. However, the present invention is not limited to this configuration, and the ridge portion 51 may be formed in a wide band shape.

In the gas vent valve 1 according to the present embodiment, four circular embossed portions are linearly arranged at equal intervals in each of the fixed portions 6. However, the present invention is not limited to this configuration, and the number and arrangement pattern of the embossed portions 7 can be appropriately changed according to the shape and size of the fixed portions 6. Further, the shape of the embossed portion 7 may be an elliptical shape or a polygonal shape.

The degassing valve 1 according to the present embodiment may further include an elastic member layer (not shown) on the surface of the valve plate film 2 on the other side in the stacking direction. The elastic member layer is preferably provided in a region overlapping the region where the solid seal layer 5 is formed when viewed from the stacking direction. The elastic member layer may be composed of a plurality of strip-shaped members. The degassing valve 1 can assist the elastic member layer to deform the valve plate film 2 between the valve open state A and the valve closed state B. Therefore, the elastic member layer makes it possible to further reduce the valve opening pressure of the gas vent valve 1, and it is possible to easily shift between the states. As the elastic member layer, for example, a layer made of an elastic resin material such as rubber varnish can be used. The elastic member layer can be formed by transferring, printing, or the like in a pattern.

The gas vent valve 1 according to the present embodiment may further include a sensor ink layer on the surface of the valve plate film 2 on the other side in the stacking direction. With such a configuration, it is possible to prevent misalignment on the production line, forgetting to paste, and the like. As the sensor ink layer (not shown), for example, a layer made of black light ink or the like can be used. The sensor ink layer can be provided, for example, in a region that overlaps the region where the valve holes 3 are formed when viewed from the stacking direction.

In the gas vent valve 1 according to the present embodiment, the surface of the valve seat film 4 to which the solid seal layer 5 is fixed may be roughened. The surface of the valve seat film 4 can be formed, for example, by applying a roughening agent such as a resin containing a filler or a matte varnish, or by applying a blasting treatment, an embossing treatment, a corona treatment, a plasma treatment, or the like. can.

Hereinafter, examples of the present invention will be described, but the present invention is not limited to the following examples.

<Making a gas vent valve>
In Example 1, a degassing valve having the structure shown in FIG. 1, that is, a degassing valve in which the solid seal layer is formed in an oblique lattice pattern was produced. In Example 2, a gas vent valve having the structure shown in FIG. 4, that is, a gas vent valve in which the solid seal layer is formed in a honeycomb shape was produced. In Comparative Example 1, the solid seal layer is composed of a plurality of ridges extending in a direction intersecting the gas ventilation direction and separated from each other, that is, the solid seal layer is formed in a striped shape. A gas vent valve having the same structure as the gas vent valve of No. 1 was produced. Further, the degassing valve of each Example and each Comparative Example is further provided with an elastic member layer on the surface on the other side of the valve plate film in the stacking direction. The elastic member layer was provided in a region overlapping the region where the solid seal layer was formed when viewed from the stacking direction. Further, the degassing valve of each Example and each Comparative Example is further provided with a sensor ink layer on the surface on the other side in the stacking direction of the valve plate film. The sensor ink layer was provided in a region overlapping the region where the valve holes are formed when viewed from the stacking direction.

Table 1 shows the shape of the solid seal layer, the width of the ridges (measured values), and the distance D (measured values) between the two opposing sides of the ridges in the gas vent valves of each example and each comparative example. show. The width of the ridge portion was 0.1 mm in Example 1 and Comparative Example 1, and the design value was 0.2 mm in Example 2. The distance D between the two opposing sides of the ridge portion was set to Example 1. The design value was 0.85 mm, and in Example 2, 0.74 mm was set as the design value. Further, the gas vent valves of each Example and each Comparative Example had a length of 20 mm along the ventilation direction and a width of 20 mm along the direction orthogonal to the ventilation direction when viewed from the stacking direction. The width W of the valve body was 14 mm.

The degassing valves of each example and each comparative example are a resin film made of polyethylene tereflatate as a valve plate film (thickness: 25 μm) and a resin film made of polyethylene tereflatate as a valve seat film (thickness: 100 μm). , X-62-7205 (manufactured by Shinetsu Chemical Co., Ltd., thickness: 7 μm) as a solid seal layer, FD clear coat FR (manufactured by Toyo Ink Co., Ltd., thickness: 5 μm) as a primer layer, and a primer layer on the surface of the valve plate film. Acrylic adhesive (thickness: 20 μm) as an adhesive layer for adhesion, Hakuri OPnis U-2 (manufactured by T & K TOKA, thickness: 5 μm) as a release agent layer, and acrylic adhesive (thickness: 5 μm) as an adhesive layer. S: 20 μm), rubber varnish (thickness: 5 μm) was used as the elastic member layer, and black light ink (thickness: 1 μm) was used as the sensor ink layer. The surface of the valve seat film to which the solid seal layer was fixed was roughened by applying a matte varnish. The embossed portion was produced at the same time as heat welding of the valve plate film and the valve seat film. The height of the embossed portion was 280 μm.

<Measurement of average closing time>
The degassing valves of each example and each comparative example were attached to the package, and a lid was provided so as to cover the degassing valve. The package is provided with an introduction hole on the side surface for introducing gas, in addition to a through hole on the surface of the adherend provided at a position where the gas vent valve is attached. By introducing gas into the package at a constant flow rate of 10 mL / min from the introduction hole, the gas vent valve opens when the gas is released from the gas vent valve. At that time, the closing time (seconds) from the opening of the degassing valve to the closing was measured. For the gas vent valve of each Example and each Comparative Example, the closing time was measured three times, and the average value thereof is shown in Table 1.

As can be seen from the results in Table 1, the degassing valve of each example satisfying all the constituent requirements of the present invention has a shorter average closing time than the degassing valve of Comparative Example 1, and thus shuts off from the external region. It has excellent properties and can prevent the gas generated in the package from scattering to the outer region.

1 Degassing valve 2 Valve plate film 3 Valve hole 4 Valve seat film 5 Solid seal layer 6 Fixed part 7 Embossed part 9 Inner peripheral edge part 11 Release agent layer 12 Adhesive layer 13 Primer layer 14 Valve body part 51 Protruding part

Claims (8)

A degassing valve comprising a valve plate film and a valve seat film laminated on one side of the valve plate film to form a valve hole.
A solid seal layer fixed to the valve seat film is provided between the valve seat film and the valve plate film so as not to block the valve hole, and the valve plate film moves in a direction away from the valve seat film. By doing so, the valve open state in which a ventilation path is formed along the gas ventilation direction between the valve plate film and the solid seal layer, and the valve plate film moves in a direction approaching the valve seat film. As a result, it has a valve body portion that is configured to be able to switch between a closed state in which the valve plate film and the solid seal layer are in close contact with each other.
The solid seal layer is a gas vent valve which is composed of a plurality of ridges extending in a plurality of directions and intersecting each other, and is formed in an oblique lattice shape or a honeycomb shape when viewed from the stacking direction. The degassing valve according to claim 1, wherein the width of the ridge portion is 0.08 mm or more and 1.0 mm or less. The gas vent valve according to claim 1 or 2, wherein the distance between the ridges facing each other when viewed from the stacking direction is 0.2 mm or more and 2.0 mm or less. Further, it has a fixing portion which is continuously arranged with respect to the valve main body portion in a direction intersecting the ventilation direction and in which the valve seat film and the valve plate film are fixed.
The degassing valve according to any one of claims 1 to 3, wherein the fixing portion includes a plurality of embossed portions formed on the surface of the other side of the valve plate film. The gas vent valve according to any one of claims 1 to 4, further comprising a release agent layer between the solid seal layer located at least on the valve hole side and the valve plate film. Further, an adhesive layer fixed to one surface of the valve seat film is provided.
The degassing valve according to any one of claims 1 to 5, which is attached to the package via the adhesive layer. An accommodating body comprising a gas generating substance and a packaging material for packaging the gas generating substance, and a degassing valve according to any one of claims 1 to 6 attached to the packaging body. An adhesive sheet comprising one or a plurality of degassing valves according to any one of claims 1 to 6.

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