JP2022191128A - Deaeration seal and deaeration seal set - Google Patents

Abstract

To provide a deaeration seal capable of facilitating a manufacturing by simplifying a layer structure and reducing cost while preventing contamination of foreign objects in a seal attached to a ventilation port surface in a notch shape and a tongue shape on a lid of a package container for microwave, and a deaeration seal set capable of preventing a discharge of vapor or hot water after heating.SOLUTION: A deaeration seal comprises a substrate 2, an adhesive layer 21 provided at a lower surface side of the substrate, a non-adhesive layer 22 provided inside of an outer edge of a lower surface side of the adhesive layer, a ventilation part 3 provided penetrated into the substrate, the adhesive layer and the non-adhesive layer and capable of releasing steam, and a resin film 4 shrinking by heat of steam and provided in the state where an outer edge upper surface side is bonded to the adhesive layer, and is not bonded to the lower surface side of the non-adhesive layer so as to cover the non-adhesive layer and the ventilation part at the lower surface side of the adhesive layer and the non-adhesive layer.SELECTED DRAWING: Figure 2

Description

TECHNICAL FIELD The present invention relates to a degassing seal and a degassing seal set, and more particularly to a degassing seal and a degassing seal set attached to a vent portion provided in a lid of a microwave heating container.

2. Description of the Related Art In recent years, among cooked foods such as lunch boxes sold at convenience stores and the like, so-called range-up products that can be directly put into a microwave oven for heating and cooking have been increasing in sales volume. These range-up products are usually sold in a state of being enclosed in a container composed of a container body and a lid containing food.

The above cooked foods are usually reheated in a microwave oven or the like at home by the purchaser, or reheated at a convenience store and taken home to eat. The water in the container evaporates to form water vapor. At this time, in a sealed container, there is a risk that the lid may be deformed by the generated steam. ing.

On the one hand, the vent provided in the lid of the container described above has good exhaust efficiency, but on the other hand, there is a possibility that a gap is formed in the tongue-shaped vent and foreign matter enters through the gap at the time of sale. had been pointed out.

As a solution to this problem, there has been proposed a seal-like valve attached to the vent provided on the lid of the container, which opens only when water vapor is generated to release the water vapor to the outside of the container. It has been proposed (Patent Document 1). According to this proposed valve, a first pattern of adhesive is attached to the outer periphery of the deformable element that shrinks due to heat, and a second pattern of adhesive is applied to the outer periphery of the lower surface of the cover layer having the opening. is attached, and the deformable element is provided inside the second patterned adhesive of the cover layer via the first patterned adhesive. With this configuration, the deformable element is contracted by heating with water vapor or the like, and the lower surface of the deformable element communicates with the opening to release the water vapor in the container.

Japanese Patent No. 5628906

However, in the proposal of Patent Document 1, the setting of the attachment positions of the first and second patterned adhesives is complicated, and advanced technology is required for manufacturing. There was a problem that it took In addition, since a space is inevitably created between the cover layer and the deformable element, there is also the problem that foreign matter enters through the opening and adheres to the surface of the deformable element. Furthermore, it has been pointed out that there is a risk of burns caused by steam continuing to be released from the opening after the steam is released, or hot water or water spilling out from the opening.

The present invention has been made in view of this background, and prevents foreign matter from entering the seal attached to the surface of the vent provided in the lid of the packaging container for microwave heating, and simplifies the layer structure. To provide a degassing seal that can be manufactured easily and at a reduced cost by doing so, and a degassing seal set that can prevent the discharge of steam or hot water after heating.

According to the present invention, the following degassing seals and degassing seal sets are provided.
First, the degassing seal of the present invention comprises a base material, an adhesive layer provided on the lower surface side of the base material,
a non-adhesive layer provided inside the outer edge of the lower surface side of the adhesive layer;
a vent capable of releasing water vapor, provided through the base material, the adhesive layer, and the non-adhesive layer;
On the lower surface side of the adhesive layer and the non-adhesive layer, the outer edge upper surface side is adhered to the adhesive layer, and the non-adhesive layer and the ventilation section are covered, and the state is not adhered to the lower surface side of the non-adhesive layer. provided with a resin film that shrinks due to the heat of water vapor,
According to the contraction of the resin film, the upper surface side of the outer edge of the resin film is peeled off from the adhesive layer, thereby allowing ventilation of the ventilation portion.
Second, the degassing seal of the present invention comprises a base material, an adhesive layer provided on the lower surface side of the base material,
a vent capable of releasing water vapor, provided through the base material and the adhesive layer;
a resin film that shrinks due to the heat of water vapor, provided on the lower surface side of the adhesive layer so as to cover the ventilation part;
A peeling layer is provided on the upper surface side of the resin film so as to be peelable from the adhesive layer,
It is characterized in that the peeling layer is peeled from the adhesive layer as the resin film shrinks, and allows ventilation in the ventilation section.
Thirdly, in the degassing seal of the first or second invention, it is preferable that a temporary adhesive layer having adhesive strength weaker than that of the adhesive layer is provided on the lower surface side of the resin film.
Fourthly, in the degassing seal of the first to third inventions, it is preferable that the resin film has different shrinkage rates in the longitudinal direction and in the lateral direction.
Fifth, in the degassing seal of the first to fourth inventions, it is preferable that a separator is provided on the lower surface side of the adhesive layer and the resin film.
Sixthly, in the degassing seals of the first to fifth inventions, it is preferable that the ventilation part is formed in a cross-shaped or arc-shaped slit.
Seventh, the degassing seal set of the present invention is provided with a covering seal for attaching so as to cover the ventilation part after deaeration of water vapor by any one of the first to sixth degassing seals. Characterized by

According to the degassing seal of the present invention, the seal attached to the surface of the vent provided on the lid of the packaging container for microwave heating prevents foreign matter from entering and simplifies the manufacturing by simplifying the layer structure. You can easily keep costs down. Further, according to the degassing seal set of the present invention, it is possible to prevent discharge of steam or hot water after heating.

1 is a schematic top view showing a degassing seal according to a first embodiment of the present invention; FIG. FIG. 2 is a schematic cross-sectional view of the degassing seal of the first embodiment shown in FIG. 1 taken along line AA; 1 is a schematic cross-sectional view for explaining the operation mechanism of the degassing seal of the first embodiment, (A) is the state before heating, (B) is the state where water vapor is released from the vent of the lid after heating, (C) shows a state in which the resin film shrinks and water vapor is released from the substrate surface. FIG. 4 is a schematic cross-sectional view showing a state in which the covering seal of the degassing seal set of the present invention is attached after heating. FIG. 5 is a schematic top view showing a deaeration seal of a second embodiment of the present invention; FIG. 2 is a schematic cross-sectional view along BB of the deaeration seal of the second embodiment shown in FIG. 1; FIG. 4 is a schematic cross-sectional view for explaining the operation mechanism of the degassing seal of the second embodiment, where (A) is the state before heating, (B) is the state where water vapor is released from the vent of the lid after heating, (C) shows a state in which the resin film shrinks and water vapor is released from the substrate surface. It is a schematic top view which shows the variation of the shape of a ventilation part.

An embodiment of a degassing seal according to the present invention will be described in detail below with reference to the drawings. First, the degassing seal of the first embodiment of the present invention will be described. 1 is a schematic top view showing the degassing seal of the first embodiment, and FIG. 2 is a schematic cross-sectional view of the degassing seal of the first embodiment shown in FIG. 1 taken along the line AA.

The degassing seal 11 of the first embodiment of the present invention includes a substrate 2, an adhesive layer 21 provided on the lower surface side of the substrate 2, a non-adhesive layer 22 provided on the lower surface side of the adhesive layer 21, Vapor-releasable ventilation part 3 provided through base material 2, adhesive layer 21 and non-adhesive layer 22, and at least ventilation part 3 covered by lower surface sides of adhesive layer 21 and non-adhesive layer 22 It is provided with a resin film 4 that shrinks due to the heat of water vapor.

The base material 2 is not particularly limited as long as it has an appropriate strength. For example, the base material 2 made of materials such as resin film and paper used for ordinary adhesive tapes can be used. When a resin film is used as the substrate 2, for example, resin film substrates made of polyethylene terephthalate (PET), polypropylene (PP), etc., and other synthetic resin film substrates can be exemplified. In the case of using paper, various types of paper such as coated paper, high quality paper, recycled paper, etc., or paper substrates composed of laminates thereof can be exemplified. Among these, a polyethylene terephthalate (PET) resin film can be preferably used from the viewpoint of strength, handleability, and the like. Moreover, the thickness of the base material 2 can be appropriately determined within a range in which the base material 2 is not easily deformed or shrunk by heating.

Further, in the degassing seal 11 of the first embodiment, an adhesive layer 21 is provided on the lower surface side of the base material 2 . The adhesive layer 21 is provided on the entire lower surface side of the base material 2 so as to cover the ventilation part 3 and its outer edge. The adhesive constituting the adhesive layer 21 can be used without particular limitation as long as it is an adhesive used for ordinary sealing. Specifically, those having a property of softening by heat are preferable, and examples thereof include adhesives such as acrylic adhesives, rubber adhesives, and hot-melt adhesives. Among these, acrylic adhesives are particularly preferred. An adhesive can be preferably used.

Further, in the degassing seal 11 of Embodiment 1, the non-adhesive layer 22 is provided on the lower surface side of the adhesive layer 21 and in a region inside the outer edge of the adhesive layer 21 . The non-adhesive layer 22 is a layer that is provided as a so-called glue killer so that the resin film 4 and the adhesive layer 21, which will be described later, do not adhere to each other.

The material constituting the non-adhesive layer 22 is not particularly limited as long as it satisfies the above conditions, and examples thereof include ink and resin. Among these, resins are preferred, and UV curable resins are particularly preferred.

In addition, the base material 2 , the adhesive layer 21 and the non-adhesive layer 22 are provided with the ventilation part 3 penetrating the upper surface of the base material 2 and the lower surface of the non-adhesive layer 22 . The shape and size of the ventilation part 3 can be appropriately set according to the shape and size of the ventilation port provided in the lid of the container to be applied. shape. Among these, incision is preferable when considering the ease of molding, and in particular, in addition to the cross shape shown in FIG. 1, the composite cross shape shown in FIG. ) are preferred.

Furthermore, a resin film 4 that shrinks due to the heat of water vapor is provided on the lower surface side of the adhesive layer 21 and the non-adhesive layer 22 . The resin film 4 is adhered to the adhesive layer 21 on the outer edge upper surface side, and is provided so as to cover the non-adhesive layer 22 and the ventilation section 3 without adhering to the lower surface side of the non-adhesive layer 22 . .

The resin film 4 is generally called a shrink film, and is not limited as long as it has a characteristic of shrinking when heated. Resin films such as polyvinyl chloride (PVC) can be exemplified. Moreover, the resin film 4 used in the present invention preferably shrinks uniformly as a whole, or preferably has different shrinkage rates in the vertical direction and the horizontal direction. By using the resin film 4 having different shrinkage rates in the vertical and horizontal directions, the adhesive portion with the adhesive layer 21 remains partially after shrinkage, and the resin film 4 can be prevented from coming off.

The shrinkage rate of the resin film 4 is basically not particularly limited as long as it is larger than the shrinkage rate of the base material 2. For example, the shrinkage rate when heated from room temperature to 100° C. is about 20 to 60%. , preferably on the order of 30-50%.

Regarding the production of the degassing seal 11 of the first embodiment, the adhesive layer 21 and the non-adhesive layer 22 are formed in a predetermined region on the lower surface side of the base material 2, and after forming the ventilation section 3, the lower surface side is Since it can be manufactured only by the process of attaching the resin film 4 to a predetermined position, it can be manufactured very simply and at low cost.

The operating mechanism of the degassing seal 11 of the first embodiment will be described below with reference to FIGS. 3(A) to 3(C). First, as shown in FIG. 3(A), the degassing seal 11 is attached so as to cover the tongue-shaped vent hole 71 provided on the surface of the lid 7 of the container for the range-up product or the like. Then, when the container is heated in a microwave oven in this state, the moisture in the food in the container evaporates, and as shown in FIG.

Then, the water vapor 6 released from the vent 71 hits the lower surface side of the resin film 4 of the degassing seal 11, and the resin film 4 is heated and starts shrinking. At this time, since the adhesive layer 21 fixing the outer edge of the resin film 4 is also heated by the water vapor 6 and softened, the outer edge of the bonded resin film 4 separates from the adhesive layer 21 softened by shrinkage. , reaches the area of the non-adhesive layer 22 and exposes the ventilation part 3 .

Then, as shown in FIG. 3C, the water vapor 6 flows from the outer edge of the shrunken resin film 4 through the ventilation part 3 provided through the base material 2, the adhesive layer 21 and the non-adhesive layer 22. It is released to the upper surface of the substrate 2 . As a result, the water vapor 6 is released to the outside of the lid 7 for the first time by heating from the initial sealed state by attaching the degassing seal 11 .

In addition, even after the heating by the microwave is completed, the steam 6 may continue to be released through the ventilation part 3. There is a risk of being burned by hot water, etc. In the present invention, assuming such a situation, as shown in FIG. can be attached as follows. After heating, by covering the ventilation part 3 with the covering seal 8, it is possible to prevent steam or hot water from being discharged from the ventilation part 3, and it is possible to reduce the risk of burns to the user.

Next, a degassing seal according to a second embodiment of the present invention will be described. 5 is a schematic top view showing the degassing seal of the second embodiment of the present invention, and FIG. 6 is a schematic cross-sectional view of the degassing seal of the second embodiment shown in FIG. 5 taken along the line AA.

The degassing seal 12 of the second embodiment of the present invention includes a base material 2, an adhesive layer 21 provided on the lower surface side of the base material 2, and water vapor provided penetrating the base material 2 and the adhesive layer 21. and a resin film 4 which shrinks due to the heat of water vapor provided on the lower surface side of the adhesive layer 21 so as to cover the ventilation part 3. - 特許庁A release layer 41 is provided on the upper surface of the resin film 4 so as to be detachable from the adhesive layer 21 .

The base material 2 in the degassing seal 12 of the second embodiment can be the same as the degassing seal 11 of the first embodiment, and has a moderate strength and is used for ordinary adhesive tapes. A substrate 2 made of a material such as paper or the like can be used. When a resin film is used as the substrate 2, for example, resin film substrates made of polyethylene terephthalate (PET), polypropylene (PP), etc., and other synthetic resin film substrates can be exemplified. In the case of using paper, various types of paper such as coated paper, high quality paper, recycled paper, etc., or paper substrates composed of laminates thereof can be exemplified. Among these, a polyethylene terephthalate (PET) resin film can be preferably used from the viewpoint of strength, handleability, and the like. Moreover, the thickness of the base material 2 can be appropriately determined within a range in which the base material 2 is not easily deformed or shrunk by heating.

Further, in the degassing seal 12 of the second embodiment, the adhesive layer 21 provided on the lower surface side of the base material 2 is provided on the entire lower surface side of the base material 2 so as to cover the ventilation section 3 . The adhesive constituting the adhesive layer 21 can be the same as the adhesive layer 21 in the degassing seal 11 of the first embodiment, such as an acrylic adhesive, a rubber adhesive, or a hot melt adhesive. Adhesives such as agents can be exemplified. Among these, an acrylic adhesive can be particularly preferably used.

Further, the base material 2 and the adhesive layer 21 are provided with a ventilation part 3 that penetrates the upper surface side of the base material 2 and the lower surface side of the adhesive layer 21 . The shape and size of the ventilation part 3 are appropriately set according to the shape and size of the tongue-shaped ventilation port 71 provided in the lid of the container to be applied, as with the degassing seal 11 of the first embodiment. However, the shape can be various shapes such as cuts, slits, through holes, and mesh. Among these, incision is preferable when considering ease of molding, etc., and in addition to the one-sided arc shape shown in FIG. is preferred.

Further, on the lower surface side of the adhesive layer 21, there is provided a resin film 4 that shrinks due to the heat of water vapor and has a peeling layer 41 provided on the upper surface side so as to be peelable from the adhesive layer 21. As shown in FIG. The resin film 4 is temporarily adhered to the adhesive layer 21 via the release layer 41 .

The resin film 4 is also a resin film such as polyethylene terephthalate (PET), polypropylene (PP), polyvinyl chloride (PVC), etc., having the same type and properties as those used for the degassing seal 11 of the first embodiment. can be used.

In addition, the release layer 41 provided on the upper surface side of the resin film 4 is fixed to the surface of the resin film 4, and the adhesive layer 21 is particularly peelable if it has a property that it can be adhered to the adhesive layer 21 in a temporary state. It can be formed of materials including, but not limited to, silicon, release varnish, and the like.

Regarding the production of the degassing seal 12 of the second embodiment, the adhesive layer 21 is formed in a predetermined area on the lower surface of the base material 2, and after forming the ventilation section 3, the upper surface is preliminarily attached to the lower surface side of the adhesive layer 21. Since it can be manufactured only by the step of attaching the resin film 4 with the release layer 41 formed on the side, it can be manufactured more simply and at a lower cost than the degassing seal 11 of the first embodiment.

The operation mechanism of the degassing seal 12 of the second embodiment will be described below with reference to FIGS. 7(A) to 7(C). First, as shown in FIG. 7(A), the degassing seal 12 is attached so as to cover the tongue-shaped vent hole 71 provided on the surface of the lid 7 of the container for the range-up product or the like. Then, when the food is heated in a microwave oven in this state, the moisture in the food in the container evaporates, and as shown in FIG.

Then, the water vapor 6 released from the vent 71 hits the lower surface of the resin film 4 of the degassing seal 12, and the resin film 4 is heated and starts shrinking. Since the resin film 4 is temporarily adhered to the surface of the adhesive layer 21 by the peeling layer 41 provided on the surface, the peeling layer 41 is peeled off from the adhesive layer 21 when the resin film 4 starts to shrink. Then, it shrinks together with the resin film 4 to expose the ventilation part 3 .

Then, as shown in FIG. 7C, the water vapor 6 flows from the outer edge of the shrunken resin film 4 to the upper surface of the base material 2 through the ventilation part 3 provided by penetrating the base material 2 and the adhesive layer 21. released. As a result, the water vapor 6 is released to the outside of the lid 7 for the first time by heating from the initial sealed state by attachment of the degassing seal 12 .

In some cases, the steam 6 may continue to be released through the ventilation part 3 even after the heating by the microwave is finished, and the user may be burned by the steam 6 or the accumulated high-temperature hot water. Here, in the degassing seal 12 of Embodiment 2, adhesiveness remains on the lower surface side of the adhesive layer 21 exposed by peeling off the peeling layer 41. By pressing downward from the top, the adhesive layer is adhered so as to cover the vent hole 71, and the vent hole 71 can be blocked. This makes it possible to easily prevent the discharge of steam and hot water from the ventilation part 3, to prevent dirt on the bag put in when taking it home, and to reduce the risk of burns to the user.

Also, in the degassing seal 12 of the second embodiment, as in the degassing seal 11 of the first embodiment, a cover seal 8 as a degassing seal set prepared separately from the degassing seal 12 is used to perform ventilation. It is also possible to reliably prevent steam or hot water from being discharged from the ventilation section 3 by attaching the adhesive so as to block the upper portion of the section 3 .

Further, in the degassing seal 1 of the first embodiment and the second embodiment of the present invention, as shown in FIGS. of temporary adhesive layer 42 can be provided. By providing the temporary adhesive layer 42 on the lower surface side of the resin film 4, it is possible to stably adhere to lids of various shapes of containers.

Furthermore, the degassing seal 1 of the first and second embodiments may be provided in a state attached to the surface of the vent provided in the lid of the container in advance. It can also be provided to be attached just before warming. In this case, it is preferable to provide the separator 5 (release paper) on the lower surface side of the adhesive layer 21 . By providing the separator 5, when using the degassing seal 1, it becomes possible to peel it off from the separator 5 and attach it.

Although the degassing seal and degassing seal set of the present invention have been described above based on the embodiments, the degassing seal and degassing seal set of the present invention are not limited to the above-described embodiments, and the gist thereof is as follows. Various modifications are possible without departing from the scope.

For example, in the degassing seals 1 of the embodiments shown in FIGS. 1, 5, and 8, the base material 2 and the resin film 4 have a circular shape when viewed from above, but the shape is not limited to this and is rectangular. or other shapes.

Moreover, although the base material 2 and the resin film 4 may be transparent, they may be colored transparent or opaque. In addition, characters or patterns may be printed on the surface of the substrate 2 .

According to the degassing seal 1 of the present invention having the above configuration, in the seal attached to the surface of the vent hole 71 of the lid 7 of the packaging container for heating in a microwave oven, foreign matter is prevented from entering and the layer structure is simplified. Manufacturing can be facilitated and costs can be reduced. Further, according to the degassing seal set of the present invention, it is possible to prevent discharge of steam or hot water after heating.

REFERENCE SIGNS LIST 1, 11, 12 Degassing seal 2 Base material 21 Adhesive layer 22 Non-adhesive layer 3 Venting part 4 Resin film 41 Peeling layer 42 Temporary adhesive layer 5 Separator 6 Water vapor 7 Lid 71 Vent 8 Coating seal

Claims (7)

a substrate, an adhesive layer provided on the lower surface side of the substrate;
a non-adhesive layer provided inside the outer edge of the lower surface side of the adhesive layer;
a vent capable of releasing water vapor, provided through the base material, the adhesive layer, and the non-adhesive layer;
On the lower surface side of the adhesive layer and the non-adhesive layer, the outer edge upper surface side is adhered to the adhesive layer, and the non-adhesive layer and the ventilation section are covered, and the state is not adhered to the lower surface side of the non-adhesive layer. provided with a resin film that shrinks due to the heat of water vapor,
A degassing seal, wherein the upper surface side of the outer edge of the resin film is peeled off from the adhesive layer as the resin film shrinks, thereby enabling ventilation of the ventilation portion. a substrate, an adhesive layer provided on the lower surface side of the substrate;
a vent capable of releasing water vapor, provided through the base material and the adhesive layer;
a resin film that shrinks due to the heat of water vapor, provided on the lower surface side of the adhesive layer so as to cover the ventilation part;
A peeling layer is provided on the upper surface side of the resin film so as to be peelable from the adhesive layer,
A degassing seal, wherein the peeling layer separates from the adhesive layer as the resin film shrinks, and allows ventilation in the ventilation section. 3. The degassing seal according to claim 1, wherein a temporary adhesive layer having adhesive strength weaker than that of said adhesive layer is provided on the lower surface side of said resin film. The degassing seal according to any one of claims 1 to 3, wherein the resin film has different shrinkage rates in the longitudinal direction and in the lateral direction. The degassing seal according to any one of claims 1 to 4, wherein a separator is provided on the lower surface side of the adhesive layer and the resin film. The degassing seal according to any one of claims 1 to 5, wherein the ventilation part is formed in a cross-shaped or arc-shaped slit. A degassing seal set comprising a cover seal for attaching so as to cover the ventilation part after deaeration of water vapor by the degassing seal according to any one of claims 1 to 6.

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