JP3614815B2 - Moisture-cure hot melt adhesive container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a container (or container) for moisture-curing hot melt adhesive, and more particularly to a container for filling and transporting moisture-curing hot melt adhesive, and in particular, a reactive urethane resin-based moisture-curing hot melt. The present invention relates to a container for filling and transporting an adhesive.
[0002]
[Prior art]
Moisture curable hot-melt adhesives are used for bonding various substrates and manufacturing building materials. Such a moisture-curing hot melt adhesive is usually filled in a metal pail can having an opening on the upper surface in a molten state, and the opening is covered, solidified, and placed in the pail. Provided to users as is.
[0003]
The lid of the pail can needs to be kept out of moisture so that the moisture-curable hot melt adhesive in the pail can not react with moisture in the air to form a cured layer on its surface. . There are various methods for covering the moisture barrier property depending on the shape of the opening of the pail can. For example, there is a method in which a plastic sealing inner lid is first fitted in the opening, and then a metal outer lid is fitted to cover the inner lid. In this method, when a pail can is transported and stored, a metal ring-shaped frame is fitted to the outer periphery of the outer lid. When the moisture-curing hot melt adhesive contained in such a pail can is taken out and used, the ring pail is usually melted by heating the whole pail can with a heater or the like. The frame, outer lid and inner lid are removed from the opening, and the heat-cured moisture-curing hot melt adhesive is taken out and used.
[0004]
In such a method of covering the opening of the pail can with a moisture barrier property, when using a solidified moisture curable hot melt adhesive, the moisture curable hot melt adhesive is heated and melted to be removed from the pail can. It is necessary. Therefore, a heating device such as a heater for heating and melting the solidified moisture-curing hot melt adhesive is necessary, and a process of removing the lid and the like is necessary to take out the hot-melt adhesive melted from the pail can. There are problems such as high cost and complicated removal work of the moisture-curable hot melt adhesive. Furthermore, since a part of the moisture-curing hot melt adhesive remains inside the pail can, it has been difficult to completely remove the hot melt adhesive from the pail can.
[0005]
Therefore, in order to solve the above-mentioned problem, a container body made of plastic and having a flange portion is used as a container for a moisture-curable hot melt adhesive that can be taken out from the container and used in a solidified state. And a container constituted by a plastic film that seals the opening, and such a container is used as a container for a normal hot melt adhesive. However, since the container is made of plastic, the moisture barrier property may be insufficient, and the moisture in the air enters the container and the moisture cured hot melt adhesive reacts with the moisture to be cured. A layer may be formed. In addition, the moisture-curable hot melt adhesive may generate toxic harmful gas containing an isocyanate component, and toxic gas may leak to the outside. In addition, the film and the container body may be damaged, which may cause the same problems as described above.
[0006]
In order to solve the problems of the container sealed with the above-described film, a sealed bag for storing the container has been proposed (see Japanese Patent Application Laid-Open No. 11-124172). This sealed bag is formed of a thin film comprising at least one inner surface of at least one selected from the group consisting of magnesium sulfate, aluminum oxide, barium oxide, calcium oxide and silicon oxide, and a resin composition containing a thermoplastic resin. Has been. However, if this sealed bag is used, 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 it takes time to handle. Furthermore, since this sealed bag is not necessarily suitable for recycling, there is a problem from the viewpoint of protecting the global environment.
[0007]
[Problems to be solved by the invention]
The present invention has been made to solve the above-described problems. Compared with conventional containers, the container cannot be sufficiently sealed, the container is easily damaged, handling is troublesome, and further, it is easy to recycle. An object of the present invention is to provide a container (or container) for moisture-curing hot-melt adhesive, in which at least one selected from the problem that it is not necessarily improved is improved.
[0008]
[Means for Solving the Problems]
As a result of various studies on conventional containers and sealed bags, the present inventor aims to use an inner container and an outer container having specific characteristics and a cover having specific characteristics without using a sealed bag. The present inventors have found that a container can be obtained and have completed the present invention.
[0009]
The present invention, in one aspect,
An inner container having a space for accommodating a moisture-curable hot melt adhesive;
An outer container having an open space to completely accommodate the opening and the inner container; and
Cover to close the opening of the outer container
A moisture-curing hot melt adhesive container comprising:
The inner container is heat-resistant, and the inner surface that defines the space part is subjected to mold release treatment.
The outer container is moisture barrier
The cover is moisture barrier and
The cover and the outer container are bonded together in a moisture barrier to provide a container in which the opening of the outer container is closed.
[0010]
In one embodiment of the present invention, the inner container provides a moisture-curable hot melt adhesive container having heat resistance of 80 ° C. or higher.
In yet another aspect of the invention, the outer container provides a moisture curable hot melt adhesive container having a flange around the opening.
In another aspect of the present invention, the outer container provides a container for moisture-curing hot melt adhesive having a depression on a side surface adjacent to the opening.
Furthermore, in a preferred aspect of the present invention, there is provided a moisture-curing hot melt adhesive container having a shape in which both the inner container and the outer container are frustums, and the area of the opening is larger than the area of the bottom. .
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 bonded in a moisture-blocking state by heat sealing.
In addition, in the above-mentioned container, the container which contains a moisture hardening type hot-melt-adhesive, the cover and the outer side container are adhere | attached in the moisture-blocking state, and the opening part of the outer side container is closed is also provided.
[0011]
DETAILED DESCRIPTION OF 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 adhesive”. Examples of “moisture curable hot melt adhesives” include reactive urethane resin moisture curable hot melt adhesives and reactive silicon resin moisture curable hot melt adhesives, such as reactive urethane resin moisture curable adhesives. Hot melt adhesives are preferred.
[0012]
In the present invention, the “inner container” has a space portion that accommodates a moisture-curable hot melt adhesive, is heat resistant, and has an inner surface that defines the space portion subjected to a release treatment. If there is, there is no particular limitation. 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 portion” are not particularly limited as long as it can accommodate the moisture-curable hot melt adhesive.
[0013]
When the moisture curable hot melt adhesive is contained in the “inner container”, the moisture curable hot melt adhesive is usually heated and melted and filled, so the “inner container” is required to have heat resistance. The degree of 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 is not melted by heat when filling the heat-melted adhesive, preferably that the container is not softened by heat, particularly preferably. It means that the container does not change its shape due to heat, that is, the container maintains its original shape even when heated.
[0014]
In addition, the inner surface of the “inner container” that defines the space for housing the moisture-curable hot melt adhesive is subjected to a release treatment in order to easily take out the filled moisture-curable hot melt adhesive. Yes. The “mold release treatment” is not particularly limited as long as it is a method usually used as “mold release treatment”, and examples thereof include silicone treatment and fluorine treatment.
[0015]
Furthermore, the inner container has a curved inner wall by applying stress to the opening with a finger at room temperature to such an extent that the moisture-curing hot melt adhesive can be easily removed. It is preferable that the shape of the opening can be easily deformed by doing so. The deformed shape is restored to the original shape of the opening when the stress caused by the finger is removed.
[0016]
The “inner container” is a frustum (conical frustum or truncated pyramid), and preferably has a shape in which the area of the opening is larger than the area of the bottom, and the frustum has an area of the opening of the bottom. It is more preferable to have a quadrangular frustum shape larger than the area, the frustum having a quadrangular frustum shape in which the area of the opening is larger than the area of the bottom, and the corners are chamfered. Particularly preferred.
[0017]
The “inner container” as described above is not particularly limited to the material as long as the “inner container” as described above can be obtained. The “inner container” is preferably manufactured from plastic, paper, or the like, and particularly preferably manufactured from plastic. Examples of such plastics include polypropylene, polyethylene, polyethylene terephthalate (PET), polyurethane, polystyrene, acrylic resin, and composite materials thereof, and polypropylene is preferable.
[0018]
The manufacturing method of 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. In addition, when the material is paper, known methods such as press molding and bending can be used. As the “inner container”, a commercially available product may be used as appropriate. The inner surface of the “inner container” is subjected to a mold release process.
[0019]
The thickness of the wall defining the space for accommodating the moisture-curable hot melt adhesive of the “inner container” is not particularly limited as long as the above “inner container” can be obtained, but is 50 to 1000 μm. Is preferable, 200 to 800 μm is more preferable, and 300 to 500 μm is particularly preferable.
In addition, the volume of the space portion that accommodates the moisture-curable hot melt adhesive in the “inner container” can be selected as appropriate, but is preferably 100 to 5000 ml for reasons such as ease of handling. It is more preferably ˜3000 ml, and particularly preferably 1000 to 2,000 ml.
[0020]
In the present invention, the `` outer container '' has an opening, has an open space that completely accommodates an inner container having a space for accommodating a moisture-curable hot melt adhesive, and is moisture-blocking, There is no particular limitation.
The “outer container” has an opening and an open space therefor in order to completely accommodate the inner container described above.
[0021]
In the present specification, “moisture-blocking” means having a moisture-blocking property that is normally considered to be moisture-blocking. More specifically, as a result of use, it means that the moisture can be substantially cut off to such an extent that the problems caused by moisture as described in the column of the prior art cannot occur, and it is not always complete. It does not mean that moisture can be cut off.
[0022]
Similarly to the “inner container”, the “outer container” is also a frustum (conical frustum or truncated pyramid), and preferably has a shape in which the area of the opening is larger than the area of the bottom. More preferably, the area of the opening has a quadrangular frustum shape larger than the area of the bottom, the frustum having a shape of a square frustum larger than the area of the bottom, It is particularly preferred that the corners are chamfered.
Further, the “inner container” and the “outer container” are both frustums (conical frustums or pyramid frustums), and preferably have a shape in which the area of the opening is larger than the area of the bottom part. More preferably, the shape of the truncated pyramid is larger than the area of the bottom, and both are frustums, 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.
[0023]
The size of the “outer container” is larger than the “inner container” because it completely accommodates the “inner container”, and further, the size of the “inner container” is just inside the “outer container”. Is particularly preferred.
[0024]
The “outer container” preferably has a flange around the opening so that the opening of the “outer container” can be easily sealed using a “cover” described later. When a “flange” is provided around the opening, the opening of the “outer container” can be easily sealed by bonding the “cover” to the “flange”. The size, shape and the like of the “flange” are not particularly limited as long as they can be easily sealed, and can be appropriately selected and used as long as they are normally “flange”.
[0025]
The “outer container” preferably has a recess on the side surface adjacent to the opening to facilitate removal of the inner container. The size, shape, etc. of the “dent” can be easily removed by changing the shape of the inner container at room temperature by applying a stress to the inner container with a finger, for example. If it is, it will not restrict | limit in particular and can select suitably.
[0026]
The “outer container” as described above is not particularly limited to the material as long as the “outer container” as described above can be obtained. The “outer container” can be manufactured from, for example, metal, plastic, paper, woody material, and composite materials thereof, and is particularly preferably manufactured from metal. Examples of such a metal include aluminum, stainless steel, copper, and iron, and aluminum is preferable. In addition, when plastic, paper, wood material, and composite materials thereof are used, moisture barrier properties may be insufficient. Therefore, an outer container formed using plastic, paper, wood material, and composite materials thereof may be used. It is preferable to form a metal layer on the surface (inner surface and / or outer surface) by a method such as vapor deposition to such an extent that moisture barrier properties can be maintained.
[0027]
The manufacturing method of the “outer container” can be appropriately selected according to the material. For example, when the material is plastic, known methods such as injection molding and blow molding can be used. Moreover, when a material is a metal, known methods, such as press molding, a bending process, and welding, can be used. A commercially available product may be used as the “outer container” as appropriate.
[0028]
The thickness of the wall defining the space for accommodating the moisture-curable hot melt adhesive of the “outer container” is not particularly limited as long as the above-mentioned “outer container” is obtained, but is 50 to 1000 μm. Is preferable, 100 to 800 μm is more preferable, and 300 to 500 μm is particularly preferable.
In addition, the volume of the space portion that accommodates the moisture-curable hot melt adhesive in the “outer container” can be selected as appropriate, but is preferably 100 to 5000 ml for reasons such as ease of handling. It is more preferably ˜3000 ml, and particularly preferably 1000 to 2,000 ml.
[0029]
The “outer container” is preferably more self-supporting. In the present specification, the term “self-supporting” means that it is not easily damaged by normal handling, and preferably supports the inner container containing the above-described moisture-curable hot-melt adhesive without substantial deformation. Therefore, it is preferable that the “outer container” be “self-supporting” in order to prevent the outer container from being damaged.
[0030]
In the present invention, the “cover” is not particularly limited as long as it can close the opening of the outer container and is moisture-blocking.
[0031]
The size and shape of the “cover” can be selected as appropriate according to the size and shape of the opening of the outer container, but it is the same shape as the opening of the outer container and the size is slightly larger. preferable. For example, if the opening of the outer container is a rectangle, the shape of the “cover” is preferably a rectangle and slightly larger than the opening. The “cover” is preferably in the form of a sheet. The thickness of the sheet-like “cover” is preferably 10 to 500 μm, more preferably 50 to 300 μm, and particularly preferably 100 to 200 μm.
The “moisture blocking property” of the “cover” is the same as the “humidity blocking property” described above.
[0032]
Furthermore, it is preferable that the “cover” is not easily broken during normal use.
In addition, the “cover” is preferably foldable with a finger at room temperature in order to be easily peeled off from the “outer container”.
[0033]
The “cover” as described above is not particularly limited to the material as long as the “cover” as described above can be obtained. The “cover” is preferably manufactured from metal and plastic or a laminate of paper and metal, but is particularly preferable to be manufactured from a laminate of metal and plastic. Examples of such metal and plastic laminates include polypropylene / aluminum / polyethylene, polypropylene / aluminum / polypropylene and polypropylene / aluminum / polyester, with polypropylene / aluminum / polypropylene being preferred.
[0034]
The “cover” is bonded to the outer container in a moisture-blocking state, but when the heat seal described below is used as the bonding method and bonded to the “outer container”, an adhesive with low moisture permeability is laminated to the cover. It is preferable. Examples of such “low adhesiveness adhesives” include polypropylene adhesives, polyethylene adhesives, polyester adhesives, polyamide adhesives, and EVA adhesives, and polypropylene adhesives and EVA adhesives. An adhesive is preferred.
[0035]
The “moisture curable hot melt adhesive container” of the present invention is a container in which the above-mentioned “cover” and “outer container” are bonded in a moisture-blocking state, and the opening of the outer container can be closed, Means a combination of an inner container, an outer container and a cover.
[0036]
Furthermore, the “moisture curable hot melt adhesive container” of the present invention includes a container in which the above-mentioned “cover” and “outer container” are bonded in a moisture-blocking state and the opening of the outer container is closed. Including. Therefore, in this case, the container described above contains a moisture-curable hot melt adhesive, the cover and the outer container are bonded in a moisture-blocking state, and the opening of the outer container is closed. Such a container is also provided.
[0037]
The “inner container” is stored in the open space of the “outer container” when the “cover” and the “outer container” are bonded.
Further, the “moisture blocking property” is as described above.
Furthermore, “adhesion in a moisture-blocking state” means bonding using an adhesion method that can maintain “moisture-blocking property”, and there is no particular limitation as long as it is such an adhesion method. As such a bonding method, for example, a method of bonding using an adhesive having low moisture permeability can be used, and heat sealing can be preferably used. The “adhesive with low moisture permeability” has already been exemplified.
[0038]
The “moisture curable hot melt adhesive container” of the present invention is manufactured and used as follows, for example.
After the inner container is accommodated in the open space of the outer container, the molten moisture-curable hot melt adhesive 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 to moisture barrier properties. At this time, bonding may be performed while filling with an inert gas such as nitrogen gas.
[0039]
In addition, this invention provides the inner container used for the above-mentioned container.
Furthermore, the present invention provides an outer container for use with the container described above.
Moreover, this invention provides the cover used for the above-mentioned container.
[0040]
Furthermore, 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 a moisture-curing hot melt adhesive container of the present invention. The moisture-curing hot melt adhesive container 1 includes an inner container 10, an outer container 20, and a cover 30. An inner container 10 is shown on the outer container 20 and a cover 30 is shown on the inner container 10. The inner container 10 has a space for accommodating a moisture-curable hot melt adhesive, and the shape of the inner container 10 is a quadrangular pyramid having an opening area larger than the bottom area. All corners are chamfered. The inner container 10 is made of polypropylene having a heat resistance of 130 ° C. in consideration of housing a moisture-curing hot melt adhesive in a molten state. Considering the ease of taking out the inner container 10 from the outer container 20, the thickness of the side wall of the inner container 10 is 0.2 mm and can be easily deformed. Further, a flange 12 is provided at the opening of the inner container 10. Furthermore, the inner surface that defines the space for accommodating the moisture curable hot melt adhesive is subjected to a release treatment using a silicon treatment.
[0041]
The outer container 20 has an open space that completely accommodates the opening and the inner container. The shape of the outer container 20 is a square pyramid whose area of the opening is larger than the area of the bottom, as in the case of the inner container 10, and all the corners are chamfered. The size of the outer container 20 is slightly larger than the inner container 10 in consideration of completely accommodating the inner container 10, and is set to a size that can accommodate the inner container 10 just. The outer container 20 accommodates the inner container 10, is self-supporting, and is made of aluminum in consideration of having moisture barrier properties, and the thickness of the inner wall is 0.5 mm. In consideration of ease of taking out the inner container 10 to be accommodated, a recess 22 is formed on the side surface adjacent to the opening. In this outer container 20, since two depressions are provided per side surface, a total of eight depressions are provided. In addition, a flange 24 is provided around the opening in consideration of easy adhesion of the opening of the cover 30 and the outer container 20 described later.
[0042]
The cover 30 covers the outer container 20 and is made of an aluminum sheet having a thickness of 0.1 mm in consideration of having a moisture barrier property. The cover 30 has a rectangular shape, and the size of the cover 30 is the size of the opening of the outer container 20. It is slightly larger than the surrounding flange 24. Furthermore, since the cover 30 is bonded later by heat-sealing with the flange 24 of the outer container 20, EVA resin is laminated on the lower surface of the cover. The cover 30 has a strength that does not break under normal storage and use conditions.
[0043]
FIG. 2 shows a schematic view of one embodiment of the moisture-curing 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. Yes. The moisture-curable hot melt adhesive container 1 according to the present invention shown in FIG. 1 includes an inner container 10 accommodated in an open space of an outer container 20 and melted in a space portion of the inner container 10. After the agent is filled (the moisture-curing 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 together in a moisture-blocking state. Reference numeral 32 denotes a mark generated on the “cover” by heat sealing.
[0044]
FIG. 3 shows 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 in a moisture-blocking state by heat sealing and sealed, and then the seal is opened. FIG. The moisture-curing hot melt adhesive container 1 sealed by heat sealing shown in FIG. 2 is easily sealed by holding the cover 30 by hand and peeling the cover 30 from the outer container 20. Can be 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 taking out the inner container 10 from the outer container 20, a finger can be put between the recess 22 and the flange 12, and the inner container 10 can be deformed, so that the inner container 10 can be easily removed from the outer container 20. It can be taken out. In addition, in FIG. 3, the moisture hardening type hot-melt-adhesive accommodated in the space part of the inner side container 10 is not illustrated.
[0045]
【The invention's effect】
Since the present invention has the configuration described above, the following effects can be obtained.
Both the outer container and the cover are moisture-blocking, and the opening of the cover and the outer container is bonded in a moisture-blocking state, so that the problem of insufficient sealing can be alleviated and substantially eliminated.
Since there is no need 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, the generation of dust can be reduced, and furthermore, since the inner container and the outer container can be reused, the problem that they are not necessarily suitable for recycling can be alleviated and substantially eliminated.
[0046]
When the inner container has a heat resistance of 80 ° C. or higher, the problem that the container is melted by heat when the heat-melted adhesive is filled can be alleviated and substantially eliminated.
When 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. Furthermore, when the outer container has a depression on the side surface adjacent to the opening, the inner container can be easily taken out. Therefore, the problem of troublesome handling can be alleviated and substantially eliminated.
When the inner container and the outer container are both frustums, and the area of the opening has a shape larger than the area of the bottom, the containers can be stored and transported by stacking the inner containers and the outer containers after use. Since it can be made easier, the problem that it is not necessarily suitable for recycling can be alleviated and substantially eliminated.
When the cover and the opening of the outer container are bonded in a moisture-blocking state by heat sealing, the problem that the sealing cannot be sufficiently performed can be alleviated and substantially eliminated.
[Brief description of the drawings]
FIG. 1 is a schematic view of one embodiment of a moisture-curing hot melt adhesive container of the present invention.
FIG. 2 is a schematic view of one embodiment of the moisture-curing hot melt adhesive container of the present invention, in which the cover and the opening of the outer container are adhered and sealed in a moisture-blocking state by heat sealing.
FIG. 3 shows 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 in a moisture-blocking state by heat sealing and sealed, and then the seal is opened. FIG.
[Explanation of symbols]
1 Moisture-cure type hot melt adhesive container,
10 inner container,
12 flange,
20 outer container,
22 depression,
24 flange,
30 cover
32 Marks caused by heat sealing

Claims (7)

An inner container having a space for accommodating a moisture-curable hot melt adhesive;
An outer container having an open space that completely accommodates an opening and an inner container, and a moisture-curable hot melt adhesive container composed of a cover that closes the opening of the outer container,
The inner container is manufactured from plastic, is heat resistant, the inner surface that defines its space is demolded, and is reusable,
The outer container is made from metal, moisture barrier , reusable,
The cover is made from a laminate of metal and plastic, is moisture barrier,
A moisture-curing hot melt adhesive container in which the cover and the outer container are bonded in a moisture-blocking state, and the opening of the outer container that completely accommodates the inner container is closed. The moisture-curable hot melt adhesive container according to claim 1, wherein the inner container has a heat resistance of 80 ° C or higher. The container for moisture-curing hot melt adhesive according to claim 1 or 2, wherein the outer container has a flange around the opening. The container for moisture-curable hot melt adhesive according to any one of claims 1 to 3, wherein the outer container has a depression on a side surface adjacent to the opening. The moisture-curable hot melt adhesive according to any one of claims 1 to 4, wherein the inner container and the outer container are both frustums and have an opening area larger than the bottom area. Agent container. The moisture-curable hot melt adhesive container according to any one of claims 1 to 5, wherein the cover and the outer container are bonded in a moisture-blocking state by heat sealing. The moisture curable hot melt adhesive according to any one of claims 1 to 6, comprising a moisture curable hot melt adhesive, wherein the cover and the outer container are bonded in a moisture-blocking state, and the opening of the outer container is closed. Agent container.

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