JP2017081648A - Package with valve device and valve device used for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a structure capable of reliably inhibiting inflow of outside air and quickly discharging gas generated in a package (a packaging container) in a valve device used by being pasted to the package.SOLUTION: A valve device 4 comprises a valve body 5, an adhesive layer 6, and a valve film 7 constituting an exhaust passage. The valve film 7 is made of a resin film having self adhesiveness, such as a wrap film. A separation promoting part 9 made of a group of projections 8 or the like is formed at the central part of the valve film 7. Because the valve film 7 is not in close contact with a lid 2 or has reduced adhesiveness at the position of the separation promoting part 9, if gas is generated inside a package, the valve film 7 is easily separated from the position of the separation promoting part 9 toward ends 7a, 7b. Thus, the gas can be quickly discharged. When the gas is discharged, the valve film 7 is quickly brought into close contact with the package 2 by pressing action and self adhesiveness of the valve body 5, thereby inhibiting entry of outside air.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a package including a valve device for ventilation control, and a valve device used therefor.

  There are articles (products) that generate gas such as carbon dioxide by fermentation or the like, such as beans such as miso, cereals, coffee beans and soybeans. When such a gas generating article is packaged in a cup container or a bag container, the container may swell or rupture due to internal pressure, or the contents may be altered and the flavor may be impaired. Therefore, it is necessary to let the gas generated in the container escape to the outside.

  However, there is a risk that foreign matters such as dust and minute insects may invade just by making a vent hole in the container. In addition, in fermented foods such as miso, it is preferable to suppress the inflow of outside air as much as possible in order to protect the product from spoilage and maintain the quality. Therefore, various valve devices have been proposed that have a check function that allows the gas generated inside to escape and prevent the inflow of outside air.

  As an example, Patent Document 1 discloses a self-adhesive film in which a valve function is maintained by paying attention to a resin film having self-adhesive properties used for a wrap film.

  That is, Patent Document 1 discloses that a self-adhesive film is formed on a pressure-sensitive adhesive layer in a valve device that is configured to form a pressure-sensitive adhesive layer on one entire surface of a valve body and close the ventilation hole of the package with the valve body. A structure in which the auxiliary film (valve film) is attached and a polymerization portion of the auxiliary film and the package is formed as a gas exhaust passage is disclosed.

  In Patent Document 1, when the valve device is attached (attached) to the packaging body, the auxiliary film is pressed against the packaging body by the valve body, so that the outside air is firmly prevented from flowing into the packaging body. On the other hand, when gas is generated inside the package and the internal pressure increases to a certain level, the auxiliary film is separated from the package to form an exhaust passage, and the gas is discharged to the outside.

Japanese Patent No. 3808840

  The valve device of Patent Document 1 has an extremely high check function even though it has a simple structure because the auxiliary film strongly adheres to the outer surface of the package. However, since the adhesion of the auxiliary film to the package is high, the gas is difficult to be discharged unless the internal pressure of the package is considerably high, and when the lid is made of a laminated film like a miso container, the lid swells upward greatly. A phenomenon has occurred, which has made it difficult to put it into practical use.

  The present invention has been made in view of such a current situation, and the use of a resin film having self-adhesiveness as a valve film follows Patent Document 1 while accurately preventing the inflow of outside air and the gas flow. It is intended to provide technology that facilitates discharge and is highly practical.

  Now, as a processed food that is heated and cooked in a microwave oven, it is packaged in a package, and when heated and heated, steam is generated and the internal pressure rises. However, the present invention is also applicable to such a valve device for a microwave oven package.

  The present invention is specified in each claim. Among these, the invention of claim 1 relates to a package with a valve device, which includes a package having a vent hole communicating with the inside and outside, and an outer surface of the package so as to cover the vent hole. And a sheet-like valve device to be adhered to.

  And, the valve device has a valve body adhered to the outer surface of the package by an adhesive layer formed on one side, and a valve film interposed between the adhesive layer and the package, The valve film has a self-adhesive property that sticks lightly to the package when it is stacked on the package, and the valve film forms an exhaust passage for the gas generated inside the package. It is a configuration.

  Further, either or both of the valve film and the packaging body are provided with a separation assisting portion that weakens or eliminates the adhesion of the valve film to the packaging body at least at a part around the vent hole. The separation assisting portion is configured by a convex portion, a concave portion, or an uneven portion.

The convex part, concave part, and concave and convex part may actually be difficult to identify, but the flat film is not flat and reduces the contact area with the mating member (or does not adhere at all). The state that is easy is included in either. This can typically be formed by embossing or dimple processing. The height (depth), density, etc., of the projections and depressions can be arbitrarily set. Rough surfaces such as nashiji are also included in the irregularities.
In addition, when forming the separation assisting portion on the package, the convex portions constituting the separation assisting portion can reach the inner periphery of the vent hole, and are formed with a certain distance from the vent hole. May be. When the separation assisting portion is formed on the valve film, it is preferable that the separation assisting portion overlaps with the vent hole. However, it is sufficient that at least a part of the separation assisting portion overlaps with the vent hole.

  As described in Patent Document 1, as resin films having self-adhesive properties, there are vinylidene chloride (PVDC) films, polyethylene films, vinyl chloride films, and the like. However, these films can also be used as valve films in the present invention.

  Moreover, the valve film can be not only a single-layer product but also a multi-layered one. For example, it is possible to use a multilayer film composed of a plurality of films such as a laminated film in which a base film such as a polyamide film is sandwiched between polyethylene films from the front and back. By selecting and laminating a film having excellent properties (adhesiveness) or a film having high extensibility, there is an advantage that even unevenness having a large difference in height can be easily processed without causing breakage.

  When comprising in multiple layers, what coated the adhesion auxiliary agent on the single side | surface or both surfaces of the base film is also employable. Also in this case, since a material excellent in elongation and strength can be used as the base film, high quality can be ensured. It is also possible to use an aluminum foil as the base film.

  In addition, it is normal that the package body is comprised with the container main body and the lid | cover, and a valve apparatus is generally attached to a lid | cover. Moreover, although a lid | cover may be a film form or a sheet form, and may be a molded product, all can be applied for the valve apparatus of this invention.

  The invention of claim 2 is directed to the valve device itself. That is, the present invention relates to a valve device that is attached to the outer surface of a package body that has a vent hole communicating with the inside and outside thereof so as to cover the vent hole, and the valve device has the same configuration as that of claim 1. ing.

The invention of claim 3 is directed to a valve device with a base body. That is, the present invention is a valve device that is attached to the outer surface of the packaging body in which a vent hole communicating with the inside and the outside is formed, covering the vent hole,
A base body having a first pressure-sensitive adhesive layer formed on one surface so as to be attached to the package, a valve body adhered to the other surface of the base body via a second pressure-sensitive adhesive layer, 2 has a valve film interposed between the pressure-sensitive adhesive layer and the valve base body, and the base body has a communication hole that overlaps the ventilation hole of the packaging body, while the valve film has It has self-adhesiveness that sticks lightly to the package body, and the valve film forms an exhaust passage for the gas generated inside the package body.
It is the basic composition.

  And in the said basic composition, the adhesiveness of the valve film with respect to the said package is weakened or eliminated in either one or both of the said valve film and a base body in at least one part of the circumference | surroundings of the said vent hole. A separation assisting portion is provided, and the separation assisting portion is configured by a convex portion, a concave portion, or an uneven portion.

  Also in the third aspect, it is sufficient that at least a part of the separation facilitating portion overlaps the communication hole, and the valve film remains flat on the outside of the separation facilitating portion and is firmly adhered to the base body by self-adhesion. The part needs to exist.

  The separation assisting portion composed of a convex portion or the like can be formed, for example, by applying ink such as inkjet, applying silicone used as a release agent, or roughening the surface by laser processing, In the present invention, the separation assisting portion is formed by plastic deformation of the valve film itself. Plastic deformation of the valve film can be easily realized by embossing or dimple processing.

  In each invention of the present application, the size of the height of the convex portion and the depth of the concave portion and the extent to which the separation assisting portion is formed can be set as necessary.

  In the first and second aspects of the invention, the valve film made of the resin film having self-adhesion overlaps the outer surface of the package while being pressed by the valve main body, so that the inflow of outside air is firmly blocked. .

  On the other hand, since the part around the vent hole is a separation assisting portion, when gas is generated inside the package and the internal pressure rises, the separation assisting portion triggers the valve film by the gas pressure. The gas can be quickly released by using the valve film as an exhaust passage.

  In other words, it can be easily peeled off by picking and pulling the end of the adhesive tape, but in the same way, the valve film is peeled off from the package with a light force at the separation assisting portion or has already been peeled off. As a result, the valve film is continuously peeled off toward the outlet of the exhaust passage with a light force. Therefore, when gas is generated inside the package, the gas can be quickly discharged.

  The action of the invention of claim 3 is the same as that of claims 1 and 2, and the valve film is easily peeled off from the base body triggered by the separation assisting portion, so that the gas is quickly released before the internal pressure becomes excessively high. Can be discharged. When the gas is discharged and the internal pressure of the packaging body is lowered, the valve film is brought into close contact with the base body by the pressing action of the valve body, thereby preventing the inflow of outside air. In this way, the valve film firmly fulfills the valve action following the change in the internal pressure of the package.

  Various modes can be selected for the separation assisting portion. However, if the separation assisting portion is formed in a mode in which the valve film itself is plastically deformed as in claim 4, the separation assisting portion is made of Thomson's without adding other members. Since it can form using such a pressurization apparatus, it can contribute to cost control. Moreover, since the member which comprises the separation assistance part does not enter the inside of a package from a vent hole, it is excellent also in safety.

  The valve device of the present invention can be applied to a food packaging body that is heated in a microwave oven and generates steam inside and reaches a predetermined internal pressure, but the size of the valve device and the ratio of the area of the separation assisting portion It is also suitable as a valve device for a food packaging body for a microwave oven because the vapor ejection pressure can be easily set by selecting

It is a figure which shows embodiment, (A) is a perspective view of the package body in the state which attached the valve apparatus, (B) is a separate perspective view. (A) is a plan view of the state in which the valve device is attached to the package, (B) is a bottom view of the state in which the valve film is turned over, (C) is a cross-sectional view taken along the line CC of (B), ( (D) is a DD sectional view of (A), (E) is an EE sectional view of (A), and (F) is a diagram showing an action. It is a figure which shows 2nd Embodiment which is another example of a separation assistance part, (A) is a bottom view, (B) (C) is a figure which shows the example of a cross section. It is a figure which shows 3rd Embodiment which formed the separation assistance part in the package, (A) is a top view, (B)-(D) is a figure which shows the example of a cross section. It is a figure which shows 4th Embodiment which is an example of a valve apparatus with a base body, (A) is a perspective view of the state attached to the bag, (B) is a perspective view of a valve apparatus, (C) is a separate front view, (D) is a plan view taken along the line DD in (C), (E) is a cross-sectional view taken along the line E-E in a state where gas is discharged, and (F) is another view seen from the same direction as (E). It is an example figure.

(1) Structure of First Embodiment Next, an embodiment of the present invention will be described with reference to the drawings. First, a first embodiment shown in FIGS. The present embodiment is applied to a miso package (packaging container). The package includes a container body 1 having a flange 1a formed on an opening edge (upper edge) and a lid 2 bonded or welded to the flange 1a of the container body 1. The container body 1 is made of a resin sheet, and the lid 2 is made of a thin sheet material in which paper, aluminum foil, a resin film or the like is laminated.

  In addition, this type of package can be stacked, so that the container body 1 is covered with an overcap made of a resin sheet, and the bank portion on which the bottom of the container body located above fits over the overcap. However, the overcap is not shown in the drawings.

  A very small diameter vent hole 3 is formed at an appropriate portion of the lid 2, and a thin sheet-like valve device 4 is attached to the outer surface of the lid 2 in a state of covering the vent hole 3. In the present embodiment, the valve device 4 has a circular appearance, but a shape such as a polygon such as a quadrangle or an ellipse can be arbitrarily set.

  As shown in FIG. 2, the valve device 4 includes a disc-shaped valve body 5 that constitutes an outer surface. A pressure-sensitive adhesive layer 6 is formed on one surface (lower surface) of the valve body 5, and a valve film 7 is attached to the pressure-sensitive adhesive layer 6. The valve body 5 is composed of a single layer film such as a PET film or a polypropylene film, a coating film in which various auxiliary films are coated on one side or both sides, or a multilayer structure film in which a plurality of types of films are joined. It can be set in consideration of ease of processing, ease of removal from the release paper, economy, and the like. For example, it can be in the range of 25 to 150 μm, but when paying attention to the ease of removal from the release paper, 50 to 100 μm (among others, about 50 μm) is preferable. The thickness of the pressure-sensitive adhesive layer 6 is preferably as thin as possible, but in reality, it is often about 20 μm.

  The valve film 7 serves as an exhaust passage for the gas generated inside the package body. In the present embodiment, the valve film 7 is long along one center line of the valve body 5 and the middle part is spread in a circular shape. It has a swollen shape. Therefore, the valve film 7 has a form that completely crosses the valve body 5, and the exposed portions 6 a of the adhesive layer 6 are formed on both sides of the valve film 7. Since the valve film 7 protrudes from the exposed portion 6a, when the valve device 4 is attached to the lid 2 of the packaging body, the valve film 7 is pressed against the surface of the separation assisting portion 9 (the valve body 5 is slightly Bends and deforms.)

  In this embodiment, as shown in FIG. 2 (B), the one end surface 7a and the other end surface 7b of the valve film 7 are exposed to the outside of the valve body 5, and therefore the gas exhaust passage has two outlets. However, it is also possible to adopt a form having only one outlet or a form having three or more outlets by forming the valve film 7 in a three-letter shape or a cross shape. When there is only one outlet of the exhaust passage, the exposed portion 6a of the pressure-sensitive adhesive layer 6 is continuously divided without being divided into two.

  As the valve film 7, a resin film used as a wrap film can be used as it is. As described above, various types such as a vinylidene chloride (PVDC) film, a polyethylene film, a vinyl chloride film, and a laminate of a polyethylene film and a polyamide film can be used. The thickness of the valve body 5 can be 5 to 50 μm. Considering ease of handling in the manufacturing process, about 10 to 20 μm is particularly preferable.

  In the present embodiment, a separation assisting portion 9 is formed on the valve film 7 by forming a group of convex portions (protrusions) 8 protruding on the opposite side of the valve body 5 at the center portion of the valve film 7. The group of convex parts 8 is formed side by side in the longitudinal direction and the short direction of the valve film 7, and the separation assisting long part 9 has a quadrangular shape. In the figure, a rough extension of the separation assisting portion 9 is indicated by a dotted line.

  In the present embodiment, the convex portion 8 is displayed in a square shape (quadrangle), but may have any shape such as a polygon other than a quadrangle, a circle, or an ellipse. It is also possible to form an arc concentric with the center of the valve body 5. As a means for forming the separation assisting portion 9, instead of forming the protruding portion 8 protruding on the side opposite to the valve body 5 (the side of the package), a group of recessed portions recessed on the valve body 5 side is adopted. Alternatively, it is also possible to adopt an uneven part in which a concave part recessed on the valve body 5 side and a convex part protruding on the opposite side of the valve body 5 are continuous.

  In any case, since the convex portion 8 and the concave portion are formed by plastic deformation of the valve film 7, the thickness of the valve film 7 does not basically change even at the convex portion 8 or the concave portion. Further, when the convex portion 8 is formed as the separation assisting portion 9, a gap is left between the valve film 7 and the lid 2 at the separation assisting portion 9.

  The separation assisting portion 9 is considerably larger than the area of the vent hole 3, but the valve body 5 and the valve film 7 are generally transparent, and it is difficult to visually recognize the separation assisting portion 9. Otherwise, when the valve device 4 is manually attached to the package, the core of the valve body 5 may be greatly displaced from the vent hole 3 and the separation assisting portion 9 may be detached from the vent hole 3. About this point, in this embodiment, the visibility of the separation assistance part 9 is ensured by apply | coating printing ink to the location of the separation assistance part 9. FIG. In addition, it is also possible to apply the printing ink to a location corresponding to the separation assisting portion 9 on the outer surface of the valve body 5 without applying the printing ink to the valve film 7.

  In the above configuration, the separation assisting portion 9 is formed only in the central portion of the valve film 7, and the portion excluding the separation assisting portion 9 is a high adhesion portion that is strongly adhered to the package. The valve film 7 is pressed against the surface of the lid 2 by the valve body 5. Therefore, outside air does not enter the inside of the container.

  When the group of projections 8 is formed as the separation assisting portion 9, only the group of projections 8 is in close contact with the lid 2 at the location of the separation assisting portion 9, as shown in FIG. When the gas is generated inside the package, even if the internal pressure does not increase excessively, the valve film 7 can be removed from the location of the separation assisting portion 9. It is easily separated from the lid 2 toward the ends 7a and 7b (peeled off). When the gas is released and the internal pressure of the package is reduced, the valve film 7 is overlapped with the lid 2 by the pressing action of the valve body 5, and the valve film 7 is quickly brought into close contact with the lid 2 by self-adhesion, so that the inflow of outside air is surely To be blocked.

  Accordingly, the gas generated inside can be quickly discharged while firmly blocking the inflow of outside air. As a result, it is possible to prevent the package from being swollen or torn by the gas generated inside. Therefore, it is excellent in practicality.

  When a group of recesses is formed as the separation assisting portion 9, the valve film 7 overlaps the lid 2 even at the location of the separation assisting portion 9, but the polymerization area is reduced by the sum of the areas of the recesses and the adhesion force is increased. When the gas is generated in the package, the separation assisting portion 9 is easily peeled off from the lid 2 by the pushing-out action due to the gas pressure. As a result of the peeling at the separation assisting portion 9, the peeling quickly shifts to both ends 7 a and 7 b with a light force (gas pressure). Therefore, the gas can be quickly discharged as in the case of the convex portion 8.

  The valve device of the present embodiment is temporarily adhered to a state in which a large number of sheets are formed and arranged on release paper, and is peeled off one by one by an automatic machine or manually and attached to the package. And it can manufacture through the following processes.

  That is, in the same manner as the method disclosed in Patent Document 1, first, the strip-shaped release paper original and the valve film original are overlapped while being fed out in the longitudinal direction. At the same time as making the cut in the shape of the film 7, the convex portion 8 and the like were processed, and then the blank portion of the valve film original was peeled off, and then the adhesive layer was formed on the release paper original By stacking the valve body material, the valve body material is stacked and adhered to the valve film 7, and then the shape of the valve body 5 is formed by cutting the valve body material with Thomson. Then, it can be manufactured by the procedure of peeling off the blank part of the valve main body.

  In this method, since the processing of the convex portion 8 and the like on the valve film 7 can be performed simultaneously with the formation of the cut by Thomson, there is an advantage that the labor of processing can be reduced. Of course, it is also possible to process a convex part etc. in the stage before it overlaps with a release film original fabric on a valve film original fabric. When printing which serves as a mark of the separation assisting portion 9 is performed, the printing on the valve film 7 or the valve main body 5 may be performed in synchronization with the feeding of the original fabric before or after the incision formation by Thomson.

(2). Other Embodiments Next, other embodiments will be described. In 2nd Embodiment shown in FIG. 3, in forming the convex part 8 in the valve film 7, the convex part 8 is formed circularly. Instead of the convex portion 8, it is also possible to form the concave portion 11 as shown in FIG. 3B or the concave portion 12 as shown in FIG. 3C. The shape in plan view can be arbitrarily set regardless of whether the protrusion 8, the recess 11, or the protrusion 12.

  In the third embodiment shown in FIG. 4, a separation assisting portion 9 ′ is formed at a location around the vent hole 3 in the lid 2. As a specific shape of the separation assisting portion 9 ', an outward convex portion 8' is formed as shown in (B), a concave portion 11 'is formed as shown in (B), or (D) As shown in FIG. 5, the uneven portion 12 'can be formed. The convex portions 8 ′ and the like are formed in a shape that is slightly separated from the vent hole 3 in the radial direction, but the inner ends of the convex portions 8 ′ and the like may be positioned on the inner periphery of the vent hole 3.

  When the separation assisting portion 9 ′ is formed on the lid 2 as shown in FIG. 4, it is not necessary to form a convex portion or the like on the valve film 7 of the valve device 4 (the formation of the convex portion on the valve film 7 is excluded. However, in terms of cost, it is preferable to form only on one side.) Even when the separation assisting portion 9 ′ is formed only on the lid 2, the adhesiveness of the valve film 7 to the lid 2 is reduced at the location of the separation assisting portion 9 ′, or a gap is left between the lid 2 and the valve film 7. Therefore, the gas can be discharged accurately and the inflow of outside air can be accurately prevented.

  In FIG. 5, the example of the valve apparatus 13 with a base body is shown. This embodiment has a structure in which a base body 14 is affixed to the valve device 4 of the first embodiment, and a second adhesive layer 18 for affixing to a package is formed on the base body 14. Yes. Accordingly, as the adhesive layer, the first adhesive layer 16 for adhering the valve body 5 ″ and the valve film 7 ″ and the second adhesive layer 15 for adhering the base body 14 to the package are formed. Yes. As in the first embodiment, the valve device 13 is manufactured in a state in which a large number of sheets are aligned with a release paper and temporarily adhered, and is peeled one by one and attached to the package.

  The base body 14 has the same shape as the valve body 5 ″, and a communication hole 17 communicating with the ventilation hole 3 of the packaging body is vacated in the center. In the first embodiment, the valve film 7 and the packaging body. An exhaust passage is formed between the cover and the lid 2, but the adhesion between the valve film and the package differs depending on the strength of the waist where the valve device is attached and the presence of wrinkles on the surface. Even if the package is made of paper or printed and the surface smoothness is poor, the adhesion of the valve film 7 may be lowered and the performance may be deteriorated. That is, in the case of the first embodiment, the valve function may not be stable depending on the properties of the package, and the application target is limited although it is inexpensive.

  On the other hand, in this embodiment, since an exhaust passage is formed between the base body 14 and the valve film 7 ″, the waist and surface state of the packaging body can be obtained by giving the base body 14 an appropriate waist. Therefore, it is possible to form a stable exhaust passage regardless of, etc. Therefore, even if the package body is easily deformed like a bag or is made of paper, the inflow of outside air is accurately prevented and the gas is quickly The base body 14 can absorb the difference in the properties of the package, so that it can be applied to a package made of various materials to exhibit a high valve function. Therefore, it is excellent in versatility.

  In this type, the separation assisting portion 9 ″ can be formed on one or both of the valve film 7 ″ and the valve body 5 ″, but in this embodiment, the separation assisting portion 9 ″ is formed on the base body 14. As an example, in (E), an example in which a group of recesses 11 ″ that are recessed toward the valve film 7 is formed is displayed. In (F), a protrusion that protrudes toward the valve film 7 ″. An example in which a group of 8 ″ is formed is shown. Both the convex portion 8 ″ and the concave portion 11 ″ are formed in a posture facing the radial direction from the communication hole 17, but their shape and arrangement can be arbitrarily set. .

  Also in this embodiment, when gas is generated inside the bag container 18, the valve film 7 ″ is peeled off from the base body 14 quickly by the gas pushing-out action with the separation assisting portion 9 ″ as a trigger for peeling. Therefore, the gas generated inside the bag container 18 can be quickly discharged. Therefore, it is possible to prevent a problem that the bag container 18 displayed on the shelf of the store swells and gives the consumer a sense of incongruity. When the gas is exhausted, the valve film 7 ″ is brought into close contact with the base body 14 by the pressing action of the valve main body 5 and its own self-adhesiveness, so that inflow of outside air is prevented.

The valve device of this embodiment can be basically manufactured by the following procedure. That is,
a. Using a release paper-like original fabric, the base film original is stacked on top of it and fed out in a state of being adhered by the second pressure-sensitive adhesive layer 15, while the valve film original is stacked on the base original material.
b. While cutting the shape of the shape of the valve film 7 ″ by Thomson into the original film of the valve film, the margin part of the original film of the valve film is peeled off.
c. While the valve body original fabric coated with the layer of the first adhesive 16 on one side is stacked on the base body original so as to cover the valve film 7, the valve body original and the base body original, Thomson cuts the shape of the valve main body 5 ″ and the base body 14, and then peels off the blank portion between the valve main body and the base body.
It can be formed by the procedure. As a result, a product in which a large number of valve devices 13 are mounted side by side on the original release paper is manufactured.

  In the case where the convex portion 8 ″ or the like is formed on the base body 14, the convex portion 8 ″ or the like can be processed on the base body raw material by a pair of pressing members before the valve film original fabric is stacked. In the case where “the convex portion 8” or the like is formed on the base film, the convex portion 8 ″ or the like can be formed on the original film of the valve film at the same time as or before the base body is cut. A manufacturing method can also be adopted.

  Although the illustrated embodiment has been described above, the present invention can be embodied in various ways. For example, the package is not limited to a resin sheet pack or bag, but can be applied to a bottle or the like. It is also possible to provide a plurality of valve films separately from each other in one valve device (in this case, the packaging body has a plurality of vent holes).

  The separation assisting portion can be constituted by a convex portion formed by applying quick-drying ink by inkjet or the like, but the ink in this case includes paint. Further, since there is no need for visibility, a vehicle containing no pigment can also be used.

  The present invention can be actually embodied in a packaging valve device. Therefore, it can be used industrially.

DESCRIPTION OF SYMBOLS 1 Container main body 2 Lid 3 Ventilation hole 4 Valve apparatus 5, 5 "Valve main body 6 Adhesive layer 7, 7" Valve film 8, 8 ', 8 "Convex part 9, 9', 9" Separation assisting part 11, 11 ' , 11 ″ concave portion 12, 12 ′ uneven portion 13 valve device with base body 14 base body 15 second adhesive layer 16 first adhesive layer 17 communication hole 18 bag-shaped package

Claims (4)

A package body provided with a vent hole communicating with the inside and outside, and a sheet-like valve device adhered to the outer surface of the package body so as to cover the vent hole;
The valve device has a valve body adhered to the outer surface of the package by an adhesive layer formed on one side, and a valve film interposed between the adhesive layer and the package,
The valve film has a self-adhesive property that is lightly adhered to the packaging body when it is overlaid on the packaging body, and an exhaust passage for gas generated inside the packaging body is formed by the valve film. And
Either one or both of the valve film and the package is provided with a separation assisting portion that weakens or eliminates the adhesion of the valve film to the package at a location around the vent hole. The facilitating part is constituted by a convex part or a concave part or an uneven part,
Package with valve device. A valve device that is attached to the outer surface of the packaging body in which a vent hole communicating with the inside and the outside is formed, covering the vent hole,
A valve body adhered to the outer surface of the package by an adhesive layer formed on one side, and a valve film interposed between the adhesive layer and the package,
The valve film has a self-adhesive property that is lightly adhered to the packaging body when it is overlaid on the packaging body, and an exhaust passage for gas generated inside the packaging body is formed by the valve film. And
Either one or both of the valve film and the package is provided with a separation assisting portion that weakens or eliminates the adhesion of the valve film to the package at a location around the vent hole. The facilitating part is constituted by a convex part or a concave part or an uneven part,
Valve device for packaging body. A valve device that is attached to the outer surface of the packaging body in which a vent hole communicating with the inside and the outside is formed, covering the vent hole,
A base body having a first pressure-sensitive adhesive layer formed on one surface so as to be attached to the package, a valve body adhered to the other surface of the base body via a second pressure-sensitive adhesive layer, 2 having a valve film interposed between the pressure-sensitive adhesive layer and the valve base body,
While the base body has a communication hole that overlaps the ventilation hole of the packaging body,
The valve film has a self-adhesive property that is lightly adhered to the packaging body when it is overlaid on the packaging body, and an exhaust passage for gas generated inside the packaging body is formed by the valve film. And
One or both of the valve film and the base body are provided with a separation assisting portion that weakens or eliminates the adhesion of the valve film to the packaging body in at least a part of the area around the vent hole. The separation assisting portion is constituted by a convex portion, a concave portion or an uneven portion,
Valve device for packaging body. The separation assisting portion is formed by plastic deformation of the valve film itself,
The packaging body with a valve device according to claim 1 or the packaging body valve device according to claim 3.

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