JP2003170970A - Container for moisture-curing hot-melt adhesive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container for a moisture-curing hot-melt adhesive, improved in at least one kind of problem selected from the problems that the tight closing of a container is not sufficiently performed, the breakage of a container is easily caused, the handling of a container takes much time, and a container is not necessarily suitable for recycling. <P>SOLUTION: The container for a moisture-curing hot-melt adhesive is composed of an inside container having a space for containing a moisture-curing hot-melt adhesive, an outside container having an opening and an open space for completely containing the inside container, and a cover for closing the opening of the outside container. The inside container has resistance to heat, and its inside surfaces defining a space are subjected to release processing. The outside container has moisture barrier properties. The cover has moisture barrier properties. The cover and the outside container are adhered to each other in a moisture barrier state, and the opening of the outside container is closed with the cover. It is preferable that the cover and the opening of the outside container are adhered to each other by heat seal in the moisture barrier state. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moisture-curable hot melt adhesive container (or container), and more particularly to a container for filling and carrying a moisture-curable hot melt adhesive, and more particularly to a reactive urethane. The present invention relates to a container for filling and carrying a resin-based moisture-curable hot melt adhesive.

[0002]

2. Description of the Related Art Moisture-curable hot melt adhesives are used for bonding various base materials and manufacturing building materials. Such a moisture-curable hot melt adhesive is usually filled in a molten state in a metal pail can or the like having an opening on the upper surface,
After opening the lid, it is solidified and provided to the user in a pail.

In order to prevent the moisture-curable hot melt adhesive contained in the pail from reacting with moisture in the air to form a hardened layer on the surface of the pail, the lid of the pail can is provided so as to block moisture. There is a need. There are various methods for covering the moisture-proof lid depending on the shape of the opening of the pail can. For example, there is a method in which a plastic inner lid is first fitted in the opening, and then a metal outer lid is fitted so as to cover the inner lid. In this method, when the pail can is further transported and stored, a metal ring-shaped frame is fitted on the outer periphery of the outer lid. When taking out and using the moisture-curable hot melt adhesive contained in such a pail can, usually, the entire pail can is heated using a heater or the like to melt the hot melt adhesive, and then the ring-shaped The frame, outer lid and inner lid are removed from the opening, and the heat-melted moisture-curable hot melt adhesive is taken out and used.

In the method of covering the opening of the pail can with a moisture barrier property, when a solidified moisture-curable hot melt adhesive is used, the moisture-curable hot melt adhesive is removed in order to remove it from the pail. It is necessary to heat and melt. Therefore, a heating device such as a heater for heating and melting the solidified moisture-curable hot melt adhesive is required, and a step for removing the lid and the like is necessary to take out the hot melt adhesive that has been heated and melted from the pail. However, there are problems that it is costly and that the work of taking out the moisture-curable hot melt adhesive is complicated. Furthermore, since a part of the moisture-curable hot melt adhesive remains attached inside the pail can, it is difficult to completely remove the hot melt adhesive from the pail can.

Therefore, in order to solve the above-mentioned problems, a moisture-curable hot melt adhesive can be taken out from the container in a solidified state and used as a moisture-curable hot melt adhesive container, which is made of plastic and has a flange portion. You can think of a container body that has a container body and a container made of a plastic film that seals the opening of
Such a container is used as a container for a usual hot melt adhesive. However, since this container is made of plastic, it may have insufficient moisture barrier properties, and moisture in the air penetrates into the container to cause curing when the moisture-curable hot melt adhesive reacts with moisture. Layers can be formed. Further, the moisture-curable hot melt adhesive may generate a toxic harmful gas containing an isocyanate component, and the toxic gas may leak to the outside. Further, the film may be broken and the body of the container may be broken, and the same problems as described above may be caused in this case.

In order to solve the problem of the above-mentioned container sealed with a film, a sealed bag in which the container is placed has been proposed (see Japanese Patent Laid-Open No. 11-124172). At least the inner surface of this sealed bag is magnesium sulfate,
It is formed of a thin film of a resin composition containing at least one selected from the group consisting of aluminum oxide, barium oxide, calcium oxide and silicon oxide, and a thermoplastic resin. However, with this sealed bag, it is necessary to cool and solidify the moisture-curable hot melt adhesive in the container before putting it in the bag. In addition, it is necessary to take out the container from the bag at the time of use, and there is a problem that the handling is troublesome. Furthermore, since this sealed bag is not always suitable for recycling, there is a problem from the viewpoint of protecting the global environment.

[0007]

DISCLOSURE OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is not possible to sufficiently seal the container as compared with a conventional container, the container is apt to be damaged, and handling is difficult. It is an object of the present invention to provide a container (or container) for a moisture-curable hot melt adhesive in which at least one selected from the problems that it is time-consuming and not necessarily suitable for recycling is improved.

[0008]

Means for Solving the Problems As a result of various studies on conventional containers, closed bags, etc., the present inventor uses an inner container and an outer container having specific characteristics and a cover having specific properties, The inventors have found that the desired container can be obtained without using a sealed bag, and have completed the present invention.

In one aspect, the present invention provides an inner container having a space for containing a moisture-curable hot melt adhesive, an outer container having an opening and an open space for completely containing the inner container, and an outer container. A moisture-curable hot-melt adhesive container composed of a cover for closing an opening, wherein the inner container is heat-resistant, the inner surface defining the space is subjected to a release treatment, and the outer container is A moisture barrier, the cover is moisture barrier, and the cover and the outer container are bonded in a moisture barrier condition to provide a container in which the opening of the outer container is closed.

In one aspect of the invention, the inner container is
Provided is a moisture-curable hot melt adhesive container having a heat resistance of 80 ° C. or higher. Further, in another aspect of the present invention, the outer container provides a moisture-curable hot melt adhesive container having a flange around the opening.
Moreover, in another one aspect | mode of this invention, an outer container provides the container for moisture hardening type hot melt adhesives which has a hollow in the side surface adjacent to an opening part. Furthermore, in a preferred embodiment of the present invention, there is provided a moisture-curable hot melt adhesive container in which both the inner container and the outer container are frustum and the opening area is larger than the bottom area. . Furthermore, in another preferred embodiment of the present invention,
The cover and the opening of the outer container provide a moisture-curable hot melt adhesive container that is heat-sealed and bonded in a moisture barrier manner. In the above container,
Also provided is a container comprising a moisture-curable hot melt adhesive, wherein the cover and the outer container are bonded in a moisture-tight condition to close the opening of the outer container.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the "moisture curable hot melt adhesive" is a so-called "hot melt adhesive", and is not particularly limited as long as it is called "moisture curable". Not a thing. Examples of the "moisture-curable hot-melt adhesive" include reactive urethane resin-based moisture-curable hot-melt adhesives and reactive silicone resin-based moisture-curable hot-melt adhesives. Hot melt adhesives are preferred.

In the present invention, the "inner container" has a space for accommodating the moisture-curable hot melt adhesive, is heat resistant, and the inner surface defining the space is subjected to a release treatment. If it exists, it is not particularly limited. Since the moisture-curable hot melt adhesive is put in the "inner container", the "inner container" has a space for it. The size and shape of the "space" is not particularly limited as long as it can accommodate the moisture-curable hot melt adhesive.

When the moisture-curable hot-melt adhesive is stored in the "inner container", the moisture-curable hot-melt adhesive is usually heated and melted before filling, so that the "inner container" is required to have heat resistance. The degree of heat resistance can be appropriately selected depending on the temperature at which the moisture-curable hot melt adhesive is filled. The “heat resistance” of the inner container is preferably 80 ° C. or higher, more preferably 100 ° C. or higher, and particularly preferably 130 ° C. or higher. In the present specification, "heat resistance" means that the container does not melt due to heat when filling the adhesive in a heating and melting state,
It is preferable that the container does not soften by heat, and particularly preferably that the container does not change its shape by heat, that is, that the container retains its original shape even when heated.

The inner surface of the "inner container" which defines the space for accommodating the moisture-curable hot melt adhesive is subjected to a mold release treatment so that the filled moisture-curable hot melt adhesive can be easily taken out. Has been done. The “release treatment” is not particularly limited as long as it is a method usually used as the “release treatment”, and examples thereof include silicone treatment and fluorine treatment.

Further, the "inner container" is prepared by applying stress to its opening with a finger at room temperature to such an extent that the filled moisture-curable hot melt adhesive can be easily taken out. It is preferable that the shape of the opening can be easily deformed by bending the wall surface or the like. The deformed shape is restored to the original shape of the opening when the stress applied by the finger is removed.

The "inner container" is preferably a truncated cone (a truncated cone or a truncated pyramid) and has a shape in which the area of the opening is larger than the area of the bottom. Is more preferably in the shape of a quadrangular pyramid that is larger than the area of the bottom, and is a truncated pyramid that has the shape of a quadrangular pyramid in which the area of the opening is larger than the area of the bottom and the corners are chamfered. Is particularly preferable.

The "inner container" as described above is not particularly limited to its material as long as the "inner container" as described above can be obtained. The "inner container" is preferably made of plastic, paper or the like, and particularly preferably made of plastic. Examples of such plastics include polypropylene, polyethylene, polyethylene terephthalate (PET), polyurethane, polystyrene, acrylic resins and composite materials thereof, and polypropylene is preferable.

The method of manufacturing the "inner container" can be appropriately selected depending on the material. For example, when the material is plastic, known methods such as injection molding and blow molding can be used. When the material is paper, known methods such as press molding and bending can be used. A commercially available product may be appropriately used as the “inner container”. The inner surface of the “inner container” is subjected to release treatment.

The thickness of the wall of the "inner container" which defines the space for containing the moisture-curable hot melt adhesive is not particularly limited as long as the above "inner container" can be obtained. 50 to 1000 μm is preferable, 200 to 80
0 μm is more preferable, and 300 to 500 μm is particularly preferable. The volume of the space portion of the "inner container" that accommodates the moisture-curable hot melt adhesive can be appropriately selected, but is 100 to 50 for reasons such as ease of handling.
It is preferably 00 ml, more preferably 500 to 3000 ml, and particularly preferably 1000 to 2000 ml.

In the present invention, the "outer container" has an open space having an opening portion and completely containing an inner container having a space portion for containing a moisture-curable hot melt adhesive,
There is no particular limitation as long as it has a moisture barrier property.
The "outer container" has an opening and an open space therefor for completely housing the inner container described above.

In the present specification, "moisture barrier" means
It means having a moisture barrier property that is usually regarded as a moisture barrier property. More specifically, it means that as a result of use, it is possible to substantially block moisture to the extent that the problems caused by moisture as described in the section of the prior art can not occur, and it is not always perfect. It does not mean that it can block moisture.

The "outer container" is the same as the "inner container".
It is a frustum (a truncated cone or a truncated pyramid) and preferably has a shape in which the area of the opening is larger than the area of the bottom. The shape of the frustum is a square pyramid in which the area of the opening is larger than the area of the bottom. More preferably it has the shape of a platform, which is a frustum,
It is particularly preferable that the shape of the truncated pyramid is larger than the area of the bottom of the opening and the corners are chamfered. Furthermore, it is preferable that both the “inner container” and the “outer container” are frustums (conical trapezoids or truncated pyramids), and the opening area is larger than the bottom area. It is more preferable that the shape of the truncated pyramid is such that the area of the opening is larger than the area of the bottom, and both are truncated pyramids and the shape of the truncated pyramid is larger than the area of the bottom. However, it is particularly preferable that the corners are chamfered.

The size of the "outer container" is larger than that of the "inner container" because it completely accommodates the "inner container", and the size of the "inner container" is just inside the "outer container". Is particularly preferred.

"Outer container" using a "cover" described later
The "outer container" preferably has a flange around the opening so that the opening can be easily sealed. If a "flange" is provided around the opening, the opening of the "outer container" can be easily sealed by adhering the "cover" to the "flange". The size and shape of the “flange” are not particularly limited as long as they can be easily sealed, and any material that is usually a “flange” can be appropriately selected and used.

The "outer container" preferably has a side recess adjacent the opening to facilitate removal of the inner container. The size and shape of the “dimple” can be determined by, for example, putting a finger and applying a stress to the inner container,
There is no particular limitation as long as the shape of the inner container can be deformed at room temperature so that the inner container can be taken out easily.

The "outer container" as described above is not particularly limited to its material as long as the "outer container" as described above can be obtained. The "outer container" is, for example,
It can be manufactured from metal, plastic, paper, wood materials and composite materials thereof, but it is particularly preferably manufactured from metal. As such a metal, for example,
Examples thereof include aluminum, stainless steel, copper, iron, etc., and aluminum is preferable. Also plastic,
When paper, wood materials and composite materials thereof are used, moisture barrier properties may be insufficient, so plastic,
It is preferable to form a metal layer on the surface (inner surface and / or outer surface) of an outer container formed by using paper, a wood material and a composite material thereof by a method such as vapor deposition to such an extent that moisture barrier property can be maintained. preferable

The method of manufacturing the "outer container" can be appropriately selected depending on the material. For example, when the material is plastic, known methods such as injection molding and blow molding can be used. When the material is metal, known methods such as press molding, bending, welding, etc. can be used. A commercially available product may be appropriately used as the “outer container”.

The thickness of the wall of the "outer container" which defines the space for containing the moisture-curable hot melt adhesive is not particularly limited as long as the above "outer container" can be obtained. 50 to 1000 μm is preferable, 100 to 80
0 μm is more preferable, and 300 to 500 μm is particularly preferable. The volume of the space portion of the "outer container" that contains the moisture-curable hot melt adhesive can be appropriately selected, but is 100 to 50 for reasons such as ease of handling.
It is preferably 00 ml, more preferably 800 to 3000 ml, particularly preferably 1000 to 2000 ml.

The "outer container" is preferably also self-supporting. In the present specification, "self-supporting" means that it is difficult to break in normal handling, and preferably supports the inner container containing the above-mentioned moisture-curable hot melt adhesive without substantially deforming it. Therefore, it is preferable that the “outer container” is “self-supporting” in order to prevent damage to the outer container.

In the present invention, the "cover" is not particularly limited as long as it can close the opening of the outer container and has a moisture barrier property.

The size and shape of the "cover" can be appropriately selected according to the size and shape of the opening of the outer container, but it is the same as the opening of the outer container, and the size is slightly smaller. It is preferably large. For example, if the opening of the outer container is quadrangular, the shape of the "cover" is quadrangular, preferably slightly larger than the opening. The "cover" is preferably in the form of a sheet. The thickness of the sheet-shaped “cover” is preferably 10 to 500 μm, more preferably 50 to 300 μm, and 100.
It is particularly preferable that the thickness is ˜200 μm. The "moisture barrier property" of the "cover" is the same as the "moisture barrier property" described above.

Further, it is preferable that the "cover" is hard to be broken in normal use. Further, the “cover” is preferably foldable with a finger at room temperature so that it can be easily peeled off from the “outer container”.

The "cover" as described above is not particularly limited to its material as long as the "cover" as described above can be obtained. The "cover" is preferably made of metal, or a plastic or a laminate of paper and metal, and particularly preferably a laminate of metal and plastic. Such metal-plastic laminates include, for example, polypropylene /
Examples are aluminum / polyethylene, polypropylene / aluminum / polypropylene and polypropylene / aluminum / polyester, with polypropylene / aluminum / polypropylene being preferred.

The "cover" is adhered to the outer container in a moisture-blocking state. When heat sealing, which will be described later, is used as an adhering method to adhere to the "outer container", an adhesive having a low moisture permeability is used as the cover. It is preferably laminated to. As such "adhesive having low moisture permeability", for example, polypropylene-based adhesive, polyethylene-based adhesive,
Polyester adhesive, polyamide adhesive and EVA
Examples of adhesives include polypropylene adhesives and EV
A-based adhesives are preferred.

The "moisture-curing hot melt adhesive container" of the present invention is in a state in which the above-mentioned "cover" and "outer container" are bonded in a moisture-blocking state so that the opening of the outer container can be closed. Container means a combination of inner container, outer container and cover.

Further, in the "container for moisture-curable hot melt adhesive" of the present invention, the above-mentioned "cover" and "outer container" are adhered in a moisture blocking state, and the opening of the outer container is closed. Including containers. So in this case,
The above-mentioned container includes a moisture-curable hot-melt adhesive, and the cover and the outer container are adhered in a moisture-blocking state so that the opening of the outer container is closed. Also provide.

The "inner container" is stored in the open space of the "outer container" when the "cover" and the "outer container" are bonded together. The “moisture barrier property” is as described above. Furthermore, "bonding in a moisture barrier state" means "moisture barrier property"
It means that the bonding is performed by using a bonding method capable of keeping the above, and the bonding method is not particularly limited as long as it is such a bonding method. As such an adhering method, for example, a method of adhering using an adhesive having low moisture permeability can be used, and preferably heat sealing can be used. The "adhesive having low moisture permeability" has already been exemplified.

The "moisture-curable hot melt adhesive container" of the present invention is manufactured and used as follows, for example. After housing the inner container in the open space of the outer container, the moisture-curable hot melt adhesive in a molten state is filled in the space of the inner container and solidified. Next, the opening of the outer container is covered with a cover and adhered in a moisture barrier property. On this occasion,
The bonding may be performed while filling an inert gas such as nitrogen gas.

The present invention also provides an inner container used for the above-mentioned container. The invention further provides an outer container for use in the container described above. The invention also provides a cover for use with the container described above.

Further, the present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 shows a schematic view of one embodiment of the moisture-curable hot melt adhesive container of the present invention. The moisture-curable hot melt adhesive container 1
It has an inner container 10, an outer container 20, and a cover 30. The inner container 10 is shown on the outer container 20, and the cover 30 is shown on the inner container 10. Inner container 10
Has a space for accommodating the moisture-curable hot melt adhesive, and the shape of the inner container 10 is a truncated pyramid with an opening area larger than the bottom area. All corners are chamfered. The inner container 10 has a heat resistance of 1 in consideration of containing a moisture-curable hot melt adhesive in a molten state.
It is made of polypropylene at 30 ° C. In consideration of the ease of taking out the inner container 10 from the outer container 20, the side wall of the inner container 10 has a thickness of 0.2 mm and is easily deformable. Further, the flange 12 is provided at the opening of the inner container 10.
Is provided. In addition, the inner surface defining the space containing the moisture-curable hot melt adhesive has been demolded using a silicone treatment.

The outer container 20 has an opening and an open space that completely accommodates the inner container. The shape of the outer container 20, like the inner container 10, is a truncated pyramid in which the area of the opening is larger than the area of the bottom, and all the corners are chamfered. The size of the outer container 20 is slightly larger than that of the inner container 10 in consideration of completely housing the inner container 10, and is set to a size capable of accommodating the inner container 10. The outer container 20 accommodates the inner container 10, is self-supporting, has moisture barrier properties, and is made of aluminum. The inner wall has a thickness of 0.5 mm. In consideration of the ease of taking out the inner container 10 to be housed, a recess 22 is formed on the side surface adjacent to the opening. In this outer container 20, since two recesses are provided for each side surface,
A total of eight depressions are provided. In addition, a flange 24 is provided around the opening in consideration of easiness of adhesion between the cover 30 and the opening of the outer container 20, which will be described later.

The cover 30 is made of an aluminum sheet having a thickness of 0.1 mm and has a quadrangular shape in consideration of having a moisture barrier property, covering the outer container 20, and its size is the same as that of the outer container 20. It is slightly larger than the flange 24 around the opening. Further, the cover 30 is later bonded to the flange 24 of the outer container 20 by heat sealing, so that the EVA resin is laminated on the lower surface of the cover 30. The cover 30 is strong enough not to break under normal storage and use conditions.

FIG. 2 is a schematic view of one embodiment of the moisture-curable hot-melt adhesive container according to the present invention, in which the cover and the opening of the outer container are sealed in a moisture-blocking state by heat sealing. Is shown. Regarding the moisture-curable hot-melt adhesive container 1 of the present invention shown in FIG. 1, the inner container 10 is housed in the open space of the outer container 20, and the moisture-curable hot-melt adhesive melted in the space of the inner container 10. After the agent is filled (moisture-curable hot melt adhesive is not shown), the cover 30 covers the opening of the outer container 20. Next, the cover 30 and the flange 24 of the outer container 20 are heat-sealed, and the cover and the opening of the outer container are bonded in a moisture-blocking state. Code 32
Indicates a mark formed on the “cover” by heat sealing.

FIG. 3 shows a container for a moisture-curable hot melt adhesive according to the present invention in which the cover and the opening of the outer container are adhered in a moisture-blocking state by heat sealing, sealed, and then opened. Figure 3 shows a schematic diagram of one embodiment. Regarding the moisture-curable hot-melt adhesive container 1 sealed by heat sealing shown in FIG. 2, a part of the cover 30 is held by hand, and the outer container 20 to the cover 3 are held.
By peeling 0, the seal can be easily opened.
In FIG. 3, the inner container 10 is accommodated in the open space of the outer container 20, and the recess 22 of the outer container 20 is half hidden by the flange 12 of the inner container 10. Therefore, when the inner container 10 is taken out from the outer container 20, a finger can be inserted between the recess 22 and the flange 12, and the inner container 10 is deformable, so that the inner container 10 can be easily removed from the outer container 20. You can take it out. In addition, in FIG.
The moisture-curable hot melt adhesive contained in the space of the inner container 10 is not shown.

[0045]

Since the present invention has the structure as described above, it has the following effects. Since the outer container and the cover both have a moisture barrier property, and the openings of the cover and the outer container are bonded in a moisture barrier state, the problem of insufficient sealing can be alleviated and substantially eliminated. Since it is not necessary to use a sealed bag, the problem of troublesome handling can be alleviated and substantially eliminated. Since it is not necessary to use a sealed bag, it is possible to reduce the generation of dust, and since the inner container and the outer container are reusable, the problem that they are not necessarily suitable for recycling can be alleviated and substantially eliminated.

When the inner container has a heat resistance of 80 ° C. or higher, the problem that the container melts due to heat when filled with a heat-melted adhesive can be alleviated and substantially eliminated. If the outer container has a flange around the opening, the cover and the outer container can be easily sealed, and the sealing can be easily released. Further, when the outer container has a recess on the side surface adjacent to the opening, the inner container can be easily taken out. Therefore, the problem of troublesome handling can be further alleviated and substantially eliminated. If both the inner container and the outer container are frustum and the area of the opening is larger than the area of the bottom, the inner container and the outer container are stacked after use to store and transport the containers. Being easier, the problem of not being suitable for recycling can be alleviated and substantially eliminated. When the cover and the opening of the outer container are heat-sealed in a moisture-blocking state, the problem of insufficient sealing can be alleviated and substantially eliminated.

[Brief description of drawings]

FIG. 1 is a schematic view of one embodiment of the moisture-curable hot melt adhesive container of the present invention.

FIG. 2 is a schematic view of one embodiment of the moisture-curable hot-melt adhesive container of the present invention, in which the cover and the opening of the outer container are bonded and sealed in a moisture-blocking state by heat sealing.

FIG. 3 is an embodiment of the moisture-curable hot melt adhesive container of the present invention in which the cover and the opening of the outer container are bonded by heat sealing in a moisture-blocking state, sealed, and then opened. Schematic of.

[Explanation of symbols] 1 Moisture-curable hot melt adhesive container, 10 inner container, 12 flanges, 20 outer container, 22 depression, 24 flanges, 30 covers 32 Marks caused by heat sealing

Continued front page    F term (reference) 3E067 AA11 AB96 BA05B BA05C                       BB14B BB25C BC01B BC01C                       BC10B BC10C CA05 CA17                       EA09 EA29 EA36 EB27 FA04                       FB15 FC01 GD01 GD08                 3E068 AA24 AB05 AC09 CC03 CD03                       CE01 CE03 DD06 DE01 EE19                       EE23 EE32

Claims (7)

[Claims] 1. An inner container having a space for accommodating a moisture-curable hot melt adhesive, an outer container having an opening and an open space for completely accommodating the inner container, and a cover for closing the opening of the outer container. A container for moisture-curable hot melt adhesives, wherein the inner container is heat-resistant, the inner surface defining the space is demolded, and the outer container is a moisture barrier and the cover is Is a moisture-blocking container, in which the cover and the outer container are bonded in a moisture-blocking state, and the opening of the outer container is closed. 2. The container according to claim 1, wherein the inner container has a heat resistance of 80 ° C. or higher. 3. The container according to claim 1, wherein the outer container has a flange around the opening. 4. The container according to claim 1, wherein the outer container has a recess on a side surface adjacent to the opening. 5. The container according to claim 1, wherein both the inner container and the outer container are frustums and have an opening area larger than a bottom area. . 6. The container according to claim 1, wherein the cover and the outer container are bonded to each other in a moisture-blocking state by heat sealing. 7. A moisture curable hot melt adhesive is included,
The container according to any one of claims 1 to 6, wherein the cover and the outer container are bonded to each other in a moisture-blocking state, and the opening of the outer container is closed.