JP2021020732A - Tube container - Google Patents

Abstract

To provide a tube container that is easily disassembled and suitable for volume reduction, internal cleaning and container recycling.SOLUTION: A tube container includes: a cylindrical body 2 made of a laminated film; a head 3 joined to one end of the body 2 and comprising a mouth 31 and a shoulder 32; and a scheduled seal portion where the other end of the body 2 is to be sealed after containing contents. The body 2 is joined so that an outermost layer and an innermost layer of both side edge portions 10a of the laminated film are overlapped with each other interposing an adhesive member 13, and the adhesive member 13 has a plurality of concave shapes evenly formed on both sides thereof. When an average value of diameters of concave openings opened on a first surface is Dave1 and an average value of diameters of concave openings opened on a second surface opposite to the first surface is Dave2, |Dave1-Dave2|/Dave2≤0.5 is satisfied.SELECTED DRAWING: Figure 1

Description

The present invention relates to a tube container.

Conventionally, a laminated film is molded into a tubular shape to form a body, and the head of a molded product having a shoulder and a mouth is joined to one end of the tubular body to form the other end of the tubular body. A tube container is known (see, for example, Patent Documents 1 and 2).

Japanese Patent No. 6167803 Japanese Patent No. 6138423

In the conventional tube container described in Patent Documents 1 and 2, the joint between one end of the body and the head and the sealing of the other end of the body are firmly melt-bonded by heat sealing or the like.
Therefore, after use, it is difficult to disassemble the tube container, and it is difficult to reduce the volume of the tube container. Further, from the viewpoint of container recycling, it is difficult to separate the containers, and further, it is difficult to disassemble the containers, so that the inside of the tube container cannot be cleaned.
An object of the present invention is to provide a tube container that can be easily disassembled and is suitable for volume reduction, internal cleaning, and container recycling.

The present invention solves the problem by the following solution means. In addition, in order to facilitate understanding, the description will be given with reference numerals corresponding to the embodiments of the present invention, but the present invention is not limited thereto. Further, the configurations described with reference numerals may be appropriately improved, or at least a part thereof may be replaced with other configurations.

The first invention includes a tubular body portion (2) made of a laminated film (10) and a mouth portion (31) and a shoulder portion (32) joined to one end of the body portion. A tube container including a head (3) and a sealing portion (4) in which the other end of the body is sealed after containing the contents, and the body is the laminated film. The outermost layer (10b) and the innermost layer (10c) of both side edges (10a) of the above are joined so as to overlap each other via the adhesive member (13), and the adhesive member is formed on both sides of the adhesive member. The concave shape (13a) is provided, and the average value of the diameters of the openings of the concave shape that opens to the first surface is set to ^Dave _1, and the opening is made to the second surface opposite to the first surface. When the average value of the diameters of the concave openings is ^Dave ₂ .
| D ^ave _1- D ^ave ₂ | / D ^ave ₂ ≤ 0.5
Regarding tube containers that satisfy the relationship of.

In the second invention, in the tube container according to the first invention, the joint between the body portion and the head portion is formed via the adhesive member.

In the third invention, in the tube container according to the first or second invention, the sealing of the other end of the body portion is formed via the adhesive member.

In the fourth invention, in the tube container according to any one of the first to third inventions, the heat seal layer is not formed on at least one surface side of the laminated film constituting the body portion.

A fifth invention relates to a tube container in which the contents are contained in a tube container according to any one of the first to fourth inventions, and the other end of the body portion is sealed.

According to the present invention, it is possible to provide a tube container that can be easily disassembled and is suitable for volume reduction, internal cleaning, and container recycling.

It is a top view which shows the tube container 1 of 1st Embodiment. It is an exploded perspective view of the tube container 1 of 1st Embodiment. (A) is a cross-sectional view taken along the line s1-s1 of FIG. (B) is a cross-sectional view taken along the line s2-s2 of FIG. (C) is a sectional view taken along line s3-s3 of FIG. It is an enlarged view of the a region shown in FIG. 3 (A). (A) is a partial cross-sectional view showing the layer structure of the first form of the laminated film 10. (B) is a partial cross-sectional view showing the layer structure of the second form of the laminated film 10. (A) to (C) are diagrams for explaining the form of the adhesive sheet 15 when used. It is a figure which shows the manufacturing apparatus of the adhesive sheet 15. It is a figure explaining the manufacturing method of the adhesive sheet 15. It is an enlarged photograph of the adhesive member 13 of the adhesive sheet 15 of the embodiment when viewed from the direction of the adherend side. It is an enlarged view in the cross section in the direction orthogonal to the sheet surface of the adhesive member 13 of the adhesive sheet 15 of an Example. It is a figure which shows the peeling force of an Example and a comparative example. (A) and (B) are diagrams showing the observation results of Sample 1. (A) and (B) are diagrams showing the observation results of Sample 2. (A) and (B) are diagrams showing the observation results of Sample 3. (A) and (B) are diagrams showing the observation results of Sample 4. (A) to (C) are diagrams showing a procedure for disassembling the tube container 1 of the first embodiment. It is a top view which shows the tube container 1A of the 2nd Embodiment. It is an exploded perspective view of the tube container 1A of the 2nd Embodiment. (A) to (C) are diagrams showing a procedure for disassembling the tube container 1A of the second embodiment. (A) and (B) are perspective views which show the divided structure of the body part 2 in the modified form.

Hereinafter, embodiments of the present disclosure will be described. The drawings attached to the present specification are all schematic drawings, and the shape, scale, aspect ratio, etc. of each part are changed or exaggerated from the actual product in consideration of ease of understanding. Further, in the drawings, hatching indicating a cross section of the member is appropriately omitted.
In the present specification and the like, terms that specify the shape, geometric conditions, and the degree thereof, for example, terms such as "orthogonal" and "direction", are referred to as "orthogonal" in addition to the strict meaning of the terms. Includes a range that can be regarded as a range, and a range that can be generally regarded as that direction.
In the drawings, the coordinate systems of X and Y that are orthogonal to each other are appropriately described. In this coordinate system, the longitudinal direction of the tube container 1 is the X direction, and the lateral direction orthogonal to the longitudinal direction is the Y direction.

(First Embodiment)
FIG. 1 is a plan view showing the tube container 1 of the first embodiment. FIG. 2 is an exploded perspective view of the tube container 1 of the first embodiment. FIG. 2 shows a state in which the end portion of the body portion 2 on the X1 side is not joined.
FIG. 3A is a cross-sectional view taken along the line s1-s1 of FIG. FIG. 3B is a cross-sectional view taken along the line s2-s2 of FIG. FIG. 3C is a sectional view taken along line s3-s3 of FIG. In FIGS. 3A to 3C, the cross section of the adhesive member 13 is shown by a thick black line.
FIG. 4 is an enlarged view of the a region shown in FIG. 3 (A).

As shown in FIG. 1, the tube container 1 of the first embodiment includes a body portion 2, a head portion 3, and a planned sealing portion 4. The tube container 1 of the first embodiment is configured as a laminated tube-shaped container by providing each of the above parts.
The body portion 2 is a portion in which the contents (not shown) are housed. A head 3 (described later) is joined to the end of the body 2 on the X2 side. Further, a planned sealing portion 4 (described later) is formed at the end portion of the body portion 2 on the X1 side. As shown in FIG. 2, the body portion 2 is joined so that the side edge portions 10a of the laminated film 10 rolled into a cylindrical shape overlap each other via the adhesive member 13. Hereinafter, in the body portion 2, the portion where the side edge portions 10a of the laminated film 10 are bonded to each other is also referred to as a “bonding region C1”. From the cylindrical shape shown in FIG. 2, the body portion 2 is further formed with a flat-shaped sealing portion 4 at the end on the X1 side. As a result, the tube container 1 has a substantially elliptical cross-sectional shape as shown in FIG. 3A in the intermediate portion in the longitudinal direction (X direction).

In the body portion 2, as shown in FIG. 4, the outermost layer 10b and the innermost layer 10c of both side edge portions 10a of the laminated film 10 are joined via the adhesive member 13. The adhesive member 13 is a sheet-like member having adhesiveness on both sides, as will be described later.
As shown in FIG. 1, the adhesive member 13 attached to the joint region C1 of the body portion 2 extends along the longitudinal direction (X direction) of the body portion 2. The width (length in the Y direction) of the joint region C1 of the body portion 2 is set by, for example, the weight of the contents contained in the tube container 1, the outer diameter of the body portion 2, and the like (joint regions C2 to be described later). The same applies to C4). The layer structure of the laminated film 10 forming the body portion 2, the structure of the adhesive member 13, the manufacturing method, the function, and the like will be described later.

The head 3 is a portion to which the contents housed in the body 2 are discharged. As shown in FIG. 2, a mouth portion 31 and a shoulder portion 32 are provided on the X2 side of the head portion 3. The mouth portion 31 is a portion that serves as a spout for the contents. For example, a cap (not shown) is detachably attached to the mouth portion 31. The shoulder portion 32 is a substantially conical portion communicating with the mouth portion 31. As shown in FIG. 2, in the tube container 1, the outer peripheral surface 3a of the head portion 3 (shoulder portion 32) on the X1 side and the inner peripheral surface 2a of the end portion of the body portion 2 on the X2 side are interposed via the adhesive member 13. Is joined. Hereinafter, the portion where the head portion 3 and the body portion 2 are joined is also referred to as a “joining region C2”. As shown in FIGS. 1 and 3B, in the tube container 1, the joint region C2 between the head portion 3 and the body portion 2 overlaps a part of the joint region C1 of the body portion 2. As shown in FIG. 2, in a state where the head portion 3 and the body portion 2 are joined, the end portion on the X1 side of the tube container 1 becomes an open end.
The head 3 can be manufactured, for example, by injection molding one or more thermoplastic resins. Further, the head 3 can also be manufactured by compression molding, injection molding, or the like by forming the thermoplastic resin member and the gas barrier member in order to secure the gas barrier property.

The planned sealing portion 4 is a portion where the end portion of the body portion 2 on the X1 side is sealed after accommodating the contents. As shown in FIG. 3C, the end portions of the body portion 2 on the X1 side are joined so that the inner peripheral surfaces overlap with each other via the adhesive member 13. Hereinafter, in the planned sealing portion 4, the portion where the end portion of the body portion 2 on the X1 side is joined is also referred to as “joining region C3”.
After the body portion 2 to which the head portion 3 is joined is rolled into a cylindrical shape and joined, the contents are accommodated from the end portion (open end) on the X1 side of the body portion 2, and the end portion on the X1 side of the body portion 2 is accommodated. By forming the planned sealing portion 4 in the tube container 1, the tube container 1 containing the contents can be obtained. The content contained in the tube container 1 is preferably relatively lightweight and not liquid, although it depends on the adhesive strength of the adhesive member 13.

Next, the layer structure of the laminated film 10 will be described with reference to an example of a laminated structure by a dry lamination method and an example of a laminated structure by an extrusion lamination method.
FIG. 5A is a partial cross-sectional view showing the layer structure of the first form of the laminated film 10.
In the laminated film 10 shown in FIG. 5A, a heat-sealing film 101, an adhesive layer 102, a barrier layer 103, an adhesive layer 104, a printing layer 105, and a base film 106 are laminated in this order from the innermost layer. There is. This embodiment is an example of a laminated structure by a dry lamination method using an adhesive layer, in which a heat-sealing film 101 and a barrier layer 103 are laminated via an adhesive layer 102, and further, an adhesive. The print layer 105 / base film 106 is laminated via the layer 104.

The heat-sealing film 101 is a film that is the innermost layer of the laminated film 10. The heat-sealing film 101 may be any film that can be melted by heat and fused to each other. For example, low-density polyethylene film (LDPE), medium-density polyethylene film (MDPE), high-density polyethylene film (HDPE), and the like. Linear (linear) low density polyethylene film (LLDPE), polypropylene film, polyolefin resin such as polyethylene or polypropylene, acrylic acid, methacrylate, maleic acid, maleic anhydride, fumaric acid, itaconic acid, and other unsaturated A film made of one or more of other resins such as acid-modified polyolefin resin film modified with carboxylic acid, polyvinyl acetate resin film, polyester resin film, polystyrene resin film, polyacrylonitrile, saturated polyester, polyvinyl alcohol, etc. Can be used.

The adhesive layer 102 is a layer that adheres between the heat-sealing film 101 and the barrier layer 103 (described later). The resin constituting the adhesive layer 102 can be appropriately selected depending on the resin constituting the film to be adhered. For example, anchor coating agents such as isocyanate-based (urethane-based), polyethyleneimine-based, polybutadiene-based, and organic titanium-based, or polyurethane-based, polyacrylic-based, polyester-based, epoxy-based, polyvinyl acetate-based, cellulose-based, and other laminates. Any adhesive can be used.
Similarly, the adhesive layer 104 is a layer that adheres between the barrier layer 103 and the printing layer 105 / base film 106. The adhesive layer 104 and the adhesive layer 102 may be made of the same material or different materials.

The barrier layer 103 is a layer that imparts gas barrier properties to the laminated film 10. As the material constituting the barrier layer 103, for example, a gas barrier material against oxygen gas, water vapor, etc., a light-shielding material against sunlight, or a material having a fragrance-retaining property against the contents can be used. .. Specifically, examples of the barrier material include aluminum foil, tin, lead, copper, iron, nickel, alloys thereof, and resin films or sheets having a metal-deposited thin film such as aluminum. Can use a barrier layer made of a resin film or sheet having a vapor-deposited thin film such as alumina, silica, or titanium oxide, which are oxides of these metals.

As the aluminum foil, an aluminum foil having a thickness of about 5 μm to 30 μm can be used. Examples of the resin film or sheet having a thin-film film of metal or metal oxide include a physical vapor deposition method such as a vacuum vapor deposition method, a sputtering method, and an ion plating method and a cluster ion beam method, and PVD. A resin film or sheet in which a thin film of a metal such as aluminum is formed on a resin film can be used by utilizing the method) or the like.

The print layer 105 is a layer that imparts a design to the laminated film 10. Examples of the colorant used for the printing layer 105 include various pigments such as red, brown, yellow, indigo, grass color, white, and black, metallic pigments, pearl pigments, polarized pearl pigments, and fluorescence. Pigments and the like can be used. Among them, as the pearl pigment, monochromatic pearls such as gold and silver, mica (mica), silica and the like can be used.

The base film 106 is a film that is the outermost layer of the laminated film 10. The material constituting the base film 106 has, for example, excellent mechanical, physical, chemical, and other properties as a basic material constituting the tube container 1, and is particularly strong and tough. It is desirable to use a resin film or sheet that has heat resistance, moisture resistance, transparency, and the like. Specifically, for example, a polyester resin, a polyamide resin, a polyaramid resin, a polyolefin resin, a polycarbonate resin, a polyacetal resin, a fluororesin, a film or sheet of another tough resin, or the like can be used. As the resin film or sheet described above, either an unstretched film, a stretched film stretched in the uniaxial direction or the biaxial direction, or the like can be used.

In a laminated film used for a general tube container, a heat-sealing film is also laminated on the outermost layer. For example, in the case of the laminated film 10 of the first form shown in FIG. 5A, a heat-sealing film is laminated on the outer side of the base film 106 via an adhesive layer. However, in the tube container 1 of the present embodiment, as shown in FIG. 4, the outermost layer 10b and the innermost layer 10c of both side edge portions 10a of the laminated film 10 are joined by the adhesive member 13, so that the outermost layer is formed. The heat-sealable film can be omitted on the side of 10b. In the laminated film 10 of the first form shown in FIG. 5A, when the transparent heat-sealing film is laminated on the outermost layer via the adhesive layer, the heat-sealing film 101 of the innermost layer and the adhesive Layer 102 can be omitted.

Next, the layer structure of the second form of the laminated film 10 will be described with reference to FIG. 5 (B).
FIG. 5B is a partial cross-sectional view showing the layer structure of the second form of the laminated film 10.
In the laminated film 10 shown in FIG. 5B, the heat-sealing film 201, the adhesive resin layer 202, the barrier layer 203, the adhesive resin layer 204, the printing layer 205, and the base film 206 are laminated in this order from the innermost layer. There is. This embodiment is an example of a laminated structure by an extrusion lamination method using an adhesive resin layer, and the adhesive resin layer 202 formed by extruding a molten resin such as polyethylene from a heat-sealing film 201 and a barrier layer 203. The printing layer 205 / base film 206 is further laminated via the adhesive resin layer 204. Here, the structure of the heat-sealing film 201, the barrier layer 203, and the base film 206 is substantially the same as that of the first-form heat-sealing film 101, the barrier layer 103, and the base film 106. The explanation is omitted. Also in this second form, as in the first form, the heat-sealing film is not provided on the outermost layer. In the laminated film 10 shown in FIG. 5B, an anchor coat layer is provided between any of the layers between the adhesive resin layer 202 and the barrier layer 203 and between the adhesive resin layer 204 and the printing layer 205. It may be laminated.

Next, the configuration, manufacturing method, function, and the like of the adhesive member 13 attached to each part of the tube container 1 will be described.
6 (A) to 6 (C) are views for explaining the form of the adhesive sheet 15 when used.
As shown in FIG. 6A, the pressure-sensitive adhesive sheet 15 includes a first peelable base material sheet 11, a pressure-sensitive adhesive member 13, and a second peelable base material sheet 14.

The first peelable base material sheet 11 is a sheet material (surface layer sheet) laminated on one surface of the adhesive member 13. The first peelable base sheet 11 (and the second peelable base sheet 14) are provided in consideration of handleability until the pressure-sensitive adhesive sheet 15 is used, and when the pressure-sensitive adhesive sheet 15 is used, That is, it is peeled off when the body portion 2, the head portion 3, and the like are joined. As the first releaseable base material sheet 11, various forms such as a conventionally known release film, separate paper, separate film, separate paper, release film, and release paper can be appropriately used. For example, high-quality paper, coated paper, impregnated paper, plastic film, or the like having a release layer formed on one side or both sides may be used. The release layer is not particularly limited as long as it is a material having releasability, but for example, silicone resin, organic resin modified silicone resin, fluororesin, aminoalkyd resin, melamine resin, acrylic resin, polyester resin and the like. Can be mentioned. As these resins, any of emulsion type, solvent type and solvent-free type can be used. When a release film provided with a release layer is used, for example, a silicone release type PET (polyethylene terephthalate) film, an untreated PET film, a PP film, a silicone release type paper, or the like can be used.

The thickness of the first peelable base sheet 11 is preferably, for example, 10 μm or more and 100 μm or less, and more preferably 20 μm or more and 60 μm or less. If it is less than the lower limit of the above layer thickness range, there is no stiffness and it becomes difficult to peel off. Further, if the upper limit value of the layer thickness range is exceeded, the stiffness is too strong and the workability at the time of sticking is lowered.
As the first peelable base sheet 11, a commercially available product may be used. For example, a 38 μm-thick polyester film (Mitsui Chemicals Tohcello) in which one side is easily peeled with a silicone-based release agent. Made by Co., Ltd., trade name: SP-PET-01) and the like.
The second peelable base material sheet 14 is a sheet material (surface layer sheet) laminated on the other surface of the adhesive member 13. Since the material, thickness, and the like of the second peelable base sheet 14 are the same as those of the first peelable base sheet 11, the description thereof will be omitted.

The adhesive member 13 has a plurality of concave shapes 13a opened on both sides thereof. Further, the adhesive member 13 has elasticity, and the plurality of concave shapes 13a each act as a fine suction cup to exert an adhesive force (adhesive force).
The adhesive member 13 can be formed, for example, by using a liquid resin composition (acrylic emulsion) disclosed in Patent Document 1 (Japanese Unexamined Patent Publication No. 2017-36404) by a production method described later. The layer thickness of the pressure-sensitive adhesive sheet 15 is preferably 1 μm or more and 500 μm or less. If it is less than the lower limit of the layer thickness range, it becomes difficult to form the concave shape, or the size of the concave shape becomes too small, and the adhesive (adsorption) property deteriorates. On the other hand, if the upper limit of the layer thickness range is exceeded, the flexibility is lowered, and the workability when joining each part of the tube container 1 is deteriorated. In order to evenly provide the concave shape 13a on both sides of the adhesive member 13, it is desirable that the layer thickness t of the adhesive member 13 is in the range of 20 μm ≦ t ≦ 40 μm. This point will be described later.

To attach the adhesive member 13 to the body 2, head 3, etc. (hereinafter, also referred to as “adhesive body 50”) using the adhesive sheet 15 shown in FIG. 6 (A), see FIG. 6 (B). As shown, the second peelable base sheet 14 is peeled from the adhesive sheet 15. Then, as shown in FIG. 6C, the exposed adhesive member 13 is attached to the adherend 50, and an appropriate pressure is applied to the surface thereof. As a result, a large number of concave shapes 13a existing on the exposed surface of the adhesive member 13 are elastically deformed, so that the adhesive member 13 is adsorbed (adhered) to the adherend 50 by the same action as that of the conventional micro suction cup. Become.

That is, due to the elastic deformation around the concave shape 13a, a force that tries to return from the deformed state to the original shape acts on the concave shape 13a. Due to this force, the closed space in the concave shape 13a becomes a negative pressure, and an adsorption action on the adherend 50 occurs. Although the suction force of the concave shape 13a alone is weak, the necessary suction force can be secured as a whole because a large number of concave shapes 13a are formed. Further, when the adhesive member 13 is manufactured, the adhesive force (adhesive force) of the adhesive member 13 can be adjusted by adjusting the amount including the concave shape 13a as a parameter, for example, the density.

After the pressure-sensitive adhesive sheet 15 is attached to the adherend 50, the first peelable base material sheet 11 is further peeled off from the pressure-sensitive adhesive sheet 15. As a result, the exposed adhesive member 13 can be attached to another adherend 50 (not shown). For example, as shown in FIG. 4, when the outermost layer 10b and the innermost layer 10c of both side edges of the laminated film 10 are joined via the adhesive member 13, the cover to be attached to one and the other surface of the adhesive member 13. Each of the body 50 is a laminated film 10.
The layer structure of the laminated film 10 is not limited to the examples of the first and second forms described above, and any layer structure may be used as long as it can be used as the tube container 1.

Next, a method of manufacturing the pressure-sensitive adhesive sheet 15 will be described.
FIG. 7 is a diagram showing a manufacturing apparatus for the adhesive sheet 15.
FIG. 8 is a diagram illustrating a method for manufacturing the adhesive sheet 15.
In order to manufacture the pressure-sensitive adhesive sheet 15, first, the composition of the acrylic emulsion disclosed in Patent Document 1 for forming the pressure-sensitive adhesive member 13 is placed in a stirrer, and nitrogen gas is mixed in the composition. Stirring is performed to include bubbles in the composition to prepare a bubble-containing composition 130 (P1: whipping step in the figure).
Next, the bubble-containing composition 130 is coated on the second peelable base material sheet 14 (P2 in the figure: coating step). In the coating step, for example, a comma coater can be used, but other known coating methods may be used.

After the bubble-containing composition 130 is coated on the second peelable base material sheet 14, the bubble-containing composition 130 is dried while being heated to form the adhesive member 13 (P3 in the figure: drying step). In the drying step, for example, a drying furnace having a temperature of about 60 ° C. to 140 ° C. can be used. As the drying time, for example, about 30 seconds to 10 minutes can be exemplified. Further, in the drying step, drying may be promoted while blowing air on the bubble-containing composition 130. By performing the drying step, concave shapes 13a are formed on both surfaces of the bubble-containing composition 130, and the adhesive member 13 is formed. The concave shape 13a is formed by breaking bubbles contained in the bubble-containing composition 130 and leaving a part of the shape of the bubbles. Here, if the bubbles burst in a state where the bubble-containing composition 130 is insufficiently cured, the concave shape 13a is unlikely to remain. On the other hand, if the bubble-containing composition 130 is cured before the bubbles burst, the concave shape 13a may not be formed. Therefore, it is desirable that the drying step is performed under the condition that the foam is broken while the bubble-containing composition 130 is cured to some extent. Therefore, the temperature and the amount of air blown in the drying step have a great influence on the state of the concave shape 13a.

After the pressure-sensitive adhesive member 13 is formed by the drying step, the separately prepared first peelable base material sheet 11 is joined to the pressure-sensitive adhesive member 13 (P4: laminating step in the figure). In this laminating step, since laminating is performed by the adsorption force (adhesive force) of the concave shape 13a of the adhesive member 13, heating is not required, and joining is possible with only a slight pressing force. Therefore, the first peelable base sheet 11 which is the surface layer sheet is not damaged.
When the laminating step is completed, the adhesive sheet 15 is completed.
As described above, in the production of the pressure-sensitive adhesive sheet 15 of the present embodiment, the pressure-sensitive adhesive sheet 15 can be efficiently manufactured without being damaged by heat when the pressure-sensitive adhesive member 13 is formed. The adhesive sheet 15 may then be rolled up or cut into a required size.

Next, an example in which the pressure-sensitive adhesive sheet 15 of the present embodiment is actually produced will be shown, and the results of comparison with the comparative example will be described.
In the pressure-sensitive adhesive sheet 15 of the example, the bubble-containing composition 130 which had been foamed using a comma coater having a clearance of 200 μm was placed on a biaxially stretched PET film having releasability on the second peelable base material sheet 14. It was applied. This was dried in a drying path at 100 ° C. for 1 minute to form an adhesive member 13, and a surface layer sheet was laminated to obtain an adhesive sheet 15. The density of the adhesive member 13 in this case was 0.39 g / cm ³ , and the thickness was 50 μm.
FIG. 9 is an enlarged photograph of the adhesive member 13 of the adhesive sheet 15 of the embodiment as viewed from the direction of the adherend.
FIG. 10 is an enlarged view in a cross section in a direction orthogonal to the sheet surface of the adhesive member 13 of the adhesive sheet 15 of the embodiment.
As shown in FIGS. 9 and 10, it can be confirmed that a large number of concave shapes 13a are formed on the adhesive member 13.

As Comparative Example 1, an adhesive sheet produced in the same manner as in the above-mentioned Example was produced except that the whipping step was not performed. The density of the adhesive member after production was 0.87 g / cm ³ , and the thickness was 100 μm.
As Comparative Example 2, an adhesive sheet (referred to as acrylic adhesive A type) in which an adhesive member was produced using SK2094 manufactured by Soken Chemical Co., Ltd., which is an acrylic resin, was prepared.
As Comparative Example 3, an adhesive sheet (referred to as acrylic adhesive B type) in which an adhesive member was produced using SK1502C manufactured by Soken Chemical Co., Ltd., which is an acrylic resin, was prepared.

The above four types of adhesive sheets were prepared and the peeling force was compared.
FIG. 11 is a diagram showing peeling force of Examples and Comparative Examples.
The peeling force in FIG. 11 is the result of measuring the peeling force at that time by performing 180 ° peeling at a tensile speed of 300 mm / min using a tensile tester. The peeling force was measured immediately after pasting (0 hours) and 1000 hours after pasting.

In the examples, it can be seen that the peeling force can be relatively small both immediately after the sticking and after 1000 hours have passed. With this degree of peeling force, the contents will not be peeled off naturally when the contents are contained in the tube container, and can be easily peeled off by applying force to peel off. Moreover, since the adsorption is performed by the concave shape 13a, the adhesive member 13 does not remain on the surface of the adherend 50 after peeling, and the adhesive force (peeling force) of the adhesive member 13 itself does not substantially change. It was possible to paste.

In Comparative Example 1, small pieces can be peeled off with a relatively small peeling force, but in the case of a large size, a certain amount of force is required for peeling. Further, after the peeling, the adhesive member remained on the surface of the adherend, and it was impossible to completely reattach.
In Comparative Example 2, in the case of a large size, a certain amount of force is required for peeling, and it is possible to peel off immediately after pasting, but after 1000 hours, the peeling force has increased significantly. Therefore, it was difficult to peel it off manually, and if it was forcibly peeled off, the surface layer sheet might be damaged.
In Comparative Example 3, the peeling force was too large immediately after the sticking, and it was difficult to peel the sheet manually, or the surface layer sheet might be damaged if the peeling force was forcibly peeled.
Further, neither of Comparative Example 2 and Comparative Example 3 was suitable for reattachment because a part of the adhesive material remained on the adherend and the adhesive strength was lowered after the peeling. ..

(Verification experiment on concave shape 13a of adhesive member 13)
As described above, the concave shape 13a of the adhesive member 13 has a great influence on the adhesive force. If the concave shape 13a is not evenly provided on both surfaces of the adhesive member 13, the adhesive force (adhesive force) of one surface of the adhesive member may decrease or increase as compared with the other surface. Further, since the concave shape 13a is evenly provided on both surfaces of the adhesive member 13, the physical properties of the adhesive member 13 become uniform, and the laminated films (body portion 2) or the laminated film (body portion 2) and the head portion become uniform. It is also preferable in terms of exhibiting sufficient adhesive strength to both of 3 and removability with the adherend.

In order to evenly provide the concave shape 13a on both surfaces of the adhesive member 13, it is important to control the coating amount (layer thickness t) of the adhesive member 13. In this regard, Patent Document 1 (Japanese Unexamined Patent Publication No. 2017-36404) does not consider anything, and it is sufficient that a micro suction cup is simply formed. In Patent Document 1, in FIG. 2 (FIG. 2 of Patent Document 1), which is a cross-sectional photograph of Example 1 formed with a WET thickness of 800 μm, a portion shown as a surface having a micro suction cup has a fine suction cup structure. However, in the part shown as the surface peeled off from the glass substrate, a structure that seems to be a huge bubble that cannot be compared with the fine suction cup structure can be confirmed. That is, in the configuration of Patent Document 1, a micro suction cup (corresponding to the concave shape 13a in the present embodiment) is formed on one surface of the adhesive member, but a micro suction cup (concave shape 13a) is formed on the other surface. Is not roughly formed.

This point was also verified by the applicant.
As a verification experiment, samples of four types of adhesive members were prepared, and the concave shapes 13a on both sides were observed by SEM. The samples are the following four types.
Sample 1: Layer thickness of adhesive member t = 25 μm
Sample 2: Layer thickness of adhesive member t = 30 μm
Sample 3: Layer thickness of adhesive member t = 35 μm
Sample 4: Layer thickness of adhesive member t≈2000 μm
The layer thickness of the sample is the layer thickness after drying. Further, for Samples 1 to 3, the glass surface was coated with the bubble-containing composition after the foaming treatment using a coater, and the drying treatment was carried out using a drying oven at 100 degrees. Sample 4 was drip-coated on a glass surface and naturally dried at room temperature. The drying conditions of Sample 4 were changed in order to verify the description in Patent Document 1 that normal temperature drying is sufficient. In each sample, the density of the adhesive member after the foaming treatment was 0.4 g / cm ³ .

12 (A) and 12 (B) are diagrams showing the observation results of Sample 1.
13 (A) and 13 (B) are diagrams showing the observation results of Sample 2.
14 (A) and 14 (B) are diagrams showing the observation results of Sample 3.
15 (A) and 15 (B) are diagrams showing the observation results of Sample 4.
As shown in FIGS. 12 to 14, it was confirmed that the fine concave shapes 13a were uniformly formed on both sides of the samples 1 to 3 in which the layer thickness t of the adhesive member was controlled.
On the other hand, in the thick sample 4 shown in FIG. 15, an extreme difference in the size of the concave shape 13a was observed between the dry surface and the glass side surface, and the same result as in FIG. 2 of Patent Document 1 was obtained. Was done.
Therefore, in order to evenly provide the concave shapes 13a on both sides of the adhesive member 13, it can be determined that the layer thickness t of the adhesive member 13 is preferably in the range of 20 μm ≦ t ≦ 40 μm.

Here, regarding the state in which the concave shape 13a is evenly provided on both surfaces of the adhesive member 13, it is desirable to satisfy the following relationship in more detail.
The average value of the diameters of the openings of the concave shape 13a that opens on the surface of the first peelable base material sheet is set to ^Dave _1, and the average value of the openings of the concave shape 13a that opens on the side of the second peelable base material sheet is set to ^Dave ₁ . When the average value of the diameter is ^Dave ₂ ,
| D ^ave _1- D ^ave ₂ | / D ^ave ₂ ≤ 0.5
It is desirable to satisfy the relationship of.
Also,
| D ^ave _1- D ^ave ₂ | / D ^ave ₂ ≤ 0.25
It is more desirable to satisfy the relationship of.

By satisfying these relationships, it is possible to reduce the difference in adhesive strength between both sides of the adhesive member 13, and also to reduce the difference in adhesive strength between the laminated films (body portion 2) or both of the laminated films (body portion 2) and the head portion 3. It is possible to satisfactorily exhibit sufficient adhesive strength against the skin and removability from the adherend.
Since it is practically impossible to obtain the average value of the diameters of all the openings as the average value of the diameters of the openings, here, the openings having a large diameter within the observation range of 1500 μm × 1100 μm. The diameters of the three openings were measured in order from the beginning, and the average value was used.
Here, when the openings of the samples of FIGS. 12 to 15 were measured and | D ^ave ₁ − D ^ave ₂ | / D ^ave ₂ was obtained, sample 1: 0.04 and sample 2: 0.06 were obtained. , Sample 3: 0.12, Sample 4: 0.69.
By using the adhesive member 13 having the above-described configuration, the tube container 1 of the first embodiment has a configuration that can be easily disassembled.

The adherend 50 (see FIG. 6C) is characterized in that the exposed adhesive surface has low tackiness according to a JIS Z 0237-compliant ball tack test. The adhesive member in the present invention exhibits a suction cup adhesive function derived from having a large number of concave shapes. Therefore, the adhesiveness derived from the material of the adhesive member is relatively small, and the tackiness is lower than that of a normal adhesive member having no concave shape. For this reason, even in a usage mode in which the adhesive surface is exposed on the outermost surface of the packaging bag, it is possible to exhibit sufficient adhesiveness when adhering to the adhesive surface while preventing stickiness of the adhesive surface. It is possible, which provides effective non-slip properties. Therefore, it can be suitably used in a mode in which the adhesive surface is exposed as in the present invention.

As described above, the adhesiveness of the adhesive member 13 can be adjusted depending on the conditions for forming the opening. Then, by changing the formation state of the opening of the adhesive member 13, two types of adhesive members 13 (classified as Type A and Type B) shown below can be produced as a method of expressing the adhesive action.
Type A: An adhesive member in which adhesive strength is exhibited by a suction cup action, and the adhesive strength of the adhesive itself also contributes to the adhesive strength. In this Type A adhesive member, the adhesiveness of the adhesive itself causes a slight "sticky" feel.
Type B: An adhesive member in which the adhesive force is developed by a sucking action, but the adhesive force of the adhesive itself does not contribute to the adhesive force or the adhesive force of the adhesive itself is not exhibited. In this Type B adhesive member, the adhesiveness of the adhesive itself does not act as an adhesive force, so that a "sticky" tactile sensation does not occur.

An inclined ball tack test (JIS Z 0237), which is an adhesive test effective for evaluating the above-mentioned "stickiness", was carried out on the above two types of adhesive members. The outline of the inclined ball tack test is as follows.
First, a test piece obtained by cutting the obtained adhesive member into a width of 25 mm and a length of 100 mm was prepared. Next, the test piece was set on a ball tack tester (manufactured by Tester Sangyo Co., Ltd.) so that the adhesive surface was the surface (the inclination angle of the adhesive surface was 30 °). Further, in an atmosphere of 23 ° C., the steel ball is rolled so as to pass through the measurement surface region of the adhesive surface of the test piece set in the ball tack tester (the length of the measurement surface is 100 mm). At this time, a steel ball having a diameter of 1/32 inch to 1 inch was used. Then, among the steel balls that stop in the region of the measurement surface when these steel balls are rolled, the value of the ball number having the maximum diameter is specified. The ball number is obtained by multiplying the diameter of the steel ball by 32. Each numerical value of the ball tack test below indicates the value of the ball number.

The results of the inclined ball tack test for the adhesive member 13 of the present embodiment are shown below.
Type A: 9 (ball No. 9)
Type B: Since the adhesive itself is not sticky, the ball No. All balls of 1 or more roll down. That is, the evaluation of ball tack is less than 1.
Since there are various forms of use as an adhesive member, it is not possible to simply give superiority or inferiority to Type A and Type B, and it is preferable to appropriately select them according to the form of use. Regarding Type A, considering the convenience of re-peeling and re-sticking, the ball tack test results are preferably 5 to 10, more preferably 6 to 9, and even more preferably 7 to 8.
In the present embodiment, since a “sticky” feel is not desirable, it is desirable to use Type B as the adhesive member 13.

Next, the procedure for disassembling the tube container 1 of the first embodiment will be described.
16 (A) to 16 (C) are views showing a procedure for disassembling the tube container 1 of the first embodiment.
First, as shown in FIG. 16A, at the end of the body 2 on the X2 side, the adhesive force of the adhesive member 13 is applied to both side edge portions 10a of the body 2 attached to the joint region C1. Also, a large force (peeling force) is applied to peel off the end of the body 2 on the X2 side so as to open in the Y1 and Y2 directions, respectively. As a result, the adhesive members 13 attached to the joint region C1 on the X2 side of the body portion 2 and the joint region C2 between the head portion 3 and the body portion 2 are peeled off, so that the X2 side of the body portion 2 is peeled off. The head 3 can be separated from the end of the head 3. Note that FIG. 16A shows an example in which the adhesive member 13 remains on the side of the body portion 2 when the head portion 3 is separated from the body portion 2, but the adhesive member 13 is the head portion 3. It may remain on the side.

Next, as shown in FIG. 16B, at the end of the body portion 2 on the X1 side, the adhesive force of the adhesive member 13 against the side edge portions 10a of the body portion 2 attached to the joint region C3. A greater force is applied to peel off the end of the body 2 on the X1 side so as to open in the Y1 and Y2 directions, respectively. As a result, the end portion of the body portion 2 on the X1 side is opened.
Subsequently, the joint region C1 of the body portion 2 is peeled off from the end portion on the X2 side or the end portion on the X1 side so as to open in the Y1 and Y2 directions toward the opposite side, respectively. As a result, as shown in FIG. 16C, the body portion 2 becomes substantially flat.
By performing the work in the above procedure, the tube container 1 can be disassembled into a head portion 3 and a body portion 2. The procedure for disassembling the tube container 1 may be the reverse of the above.

In the tube container 1 of the first embodiment described above, the overlapping portions of both side edges of the body portion 2, the overlapping portion of the head portion 3 and the body portion 2, and the overlapping portion of the end portion of the body portion 2 on the X1 side are respectively. It is joined by the adhesive member 13. The adhesive member 13 that joins each portion can be peeled off with a relatively small peeling force, but has an adhesive force that does not naturally peel off when the contents are contained in the tube container 1. Therefore, the tube container 1 can maintain its shape as a container in a state where the contents are contained, and can be easily disassembled by applying a small peeling force to each joint portion at the time of disassembly.

Further, in the tube container 1 of the first embodiment, not only the overlapping portions of the both side edges of the body portion 2 but also the overlapping portions of the head portion 3 and the body portion 2 and the overlapping portions of the body portion 2 on the X1 side overlap. The portions are joined by the adhesive member 13. Therefore, when the tube container 1 is disassembled, the head portion 3 can be easily separated from the body portion 2, and the body portion 2 can be made substantially flat. Therefore, the tube container 1 of the first embodiment is also suitable for volume reduction, internal cleaning, and container recycling as a tube container.

(Second Embodiment)
The tube container 1A of the second embodiment is different from the first embodiment in that the bottom portion 5 is provided on the X1 side of the body portion 2. In the tube container 1A of the second embodiment, other configurations are substantially the same as those of the first embodiment. Therefore, in the description and drawings of the second embodiment, members and the like equivalent to those of the first embodiment are designated by the same reference numerals as those of the first embodiment, and duplicate description will be omitted.
FIG. 17 is a plan view showing the tube container 1A of the second embodiment. FIG. 18 is an exploded perspective view of the tube container 1A of the second embodiment.

As shown in FIGS. 17 and 18, the tube container 1A of the second embodiment includes a body portion 2, a head portion 3, and a bottom portion 5. The tube container 1A of the second embodiment is configured as an elongated bottle-shaped container by providing each of the above parts.
In the tube container 1A of the second embodiment, the configuration of the body portion 2 and the head portion 3 is the same as that of the first embodiment, and thus the description thereof will be omitted. The cross section of the s4-s4 line shown in FIG. 17 is the same as that in FIG. 3 (B). The cross section of the s5-s5 line shown in FIG. 18 is the same in FIG. 3 (A) except that the shape of the body portion 2 is circular.

The bottom portion (scheduled sealing portion) 5 is a bottomed member that seals the end portion of the body portion 2 on the X1 side. In the tube container 1A, the outer peripheral surface 5a of the bottom portion 5 on the X2 side and the inner peripheral surface 2a of the end portion of the body portion 2 on the X1 side are joined via the adhesive member 13. Hereinafter, the portion where the bottom portion 5 and the body portion 2 are joined is also referred to as a “joining region C4”. As shown in FIG. 17, in the tube container 1A, the joint region C4 between the bottom portion 5 and the body portion 2 overlaps a part of the joint region C1 of the body portion 2. The bottom 5 can be made, for example, by injection molding one or more thermoplastic resins. Further, in order to secure the gas barrier property, the bottom portion 5 can also be manufactured by compression molding, injection molding, or the like by forming the thermoplastic resin member and the gas barrier property member.

In the tube container 1A, for example, the head portion 3 and the end portion of the body portion 2 on the X2 side are joined by the adhesive member 13, and then both side edge portions 10a of the cylindrically rolled body portion 2 are joined by the adhesive member 13. As a result, the head portion 3 is joined to the cylindrical body portion 2. In this state, the end of the tube container 1A on the X1 side becomes an open end. After that, the contents are accommodated from the X1 side end (open end) of the body portion 2, and the contents are accommodated by joining the X1 side end portion and the bottom portion 5 of the body portion 2 with the adhesive member 13. The tube container 1A is obtained. The procedure for accommodating the contents in the tube container 1A may be the reverse of the above.

Next, the procedure for disassembling the tube container 1A of the second embodiment will be described.
19 (A) to 19 (C) are views showing a procedure for disassembling the tube container 1A of the second embodiment. In the disassembly of the tube container 1A of the second embodiment, a part of the description of the work overlapping with the tube container 1 of the first embodiment will be omitted.

When disassembling the tube container 1A of the second embodiment, first, as shown in FIG. 19A, at the end of the body 2 on the X2 side, both side edges of the body 2 attached to the joint region C1. A force (peeling force) larger than the adhesive force of the adhesive member 13 is applied to the portion 10a, and the end portions of the body portion 2 on the X2 side are peeled off so as to open in the Y1 and Y2 directions, respectively. As a result, the adhesive members 13 attached to the joint region C1 on the X2 side of the body portion 2 and the joint region C2 between the head portion 3 and the body portion 2 are peeled off, so that the X2 side of the body portion 2 is peeled off. The head 3 can be separated from the end of the head 3. Note that FIG. 19A shows an example in which the adhesive member 13 remains on the side of the body portion 2 when the head portion 3 is separated from the body portion 2, but the adhesive member 13 is the head portion 3. It may remain on the side.

Next, as shown in FIG. 19B, at the end of the body portion 2 on the X1 side, the adhesive force of the adhesive member 13 against the side edge portions 10a of the body portion 2 attached to the joint region C4. A greater force is applied to peel off the end of the body 2 on the X1 side so as to open in the Y1 and Y2 directions, respectively. As a result, the adhesive members 13 attached to the joint region C1 on the X1 side of the body portion 2 and the joint region C4 between the bottom portion 5 and the body portion 2 are peeled off, so that the adhesive member 13 attached to each of them is peeled off. The bottom 5 can be separated from the end. Note that FIG. 19B shows an example in which the adhesive member 13 remains on the side of the body 2 when the bottom 5 is separated from the body 2, but the adhesive member 13 is on the side of the bottom 5. It may remain.

Subsequently, the joint region C1 of the body portion 2 is peeled off from the end portion on the X2 side or the end portion on the X1 side so as to open in the Y1 and Y2 directions toward the opposite side, respectively. As a result, as shown in FIG. 19C, the body portion 2 becomes substantially flat.
By performing the work according to the above procedure, the tube container 1A can be disassembled into the head 3, the body 2, and the bottom 5. The procedure for disassembling the tube container 1A may be the reverse of the above.
Even in the tube container 1A of the second embodiment described above, the shape of the container can be maintained in the state where the contents are contained, and at the time of disassembly, a small peeling force is applied to each joint portion, so that the shape can be easily maintained. Can be disassembled. Further, the tube container 1A of the second embodiment is also suitable for volume reduction, internal cleaning and container recycling as a tube container.

Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments, and various modifications and changes can be made as in the modified forms described later, and these are also disclosed in the present disclosure. Included within the technical scope of. Moreover, the effects described in the embodiments are merely a list of the most suitable effects resulting from the present disclosure, and are not limited to those described in the embodiments. The above-described embodiment and the modified form described later may be used in combination as appropriate, but detailed description thereof will be omitted.

(Transformed form)
In the tube container 1 of the first embodiment, joining by an adhesive, heat seal or the like may be applied to the joining of the head portion 3 and the body portion 2 and the joining of the planned sealing portion 4. Further, in the tube container 1A of the second embodiment, a joining by an adhesive, a heat seal or the like may be applied to the joining between the head portion 3 and the body portion 2 and the joining between the body portion 2 and the bottom portion 5. That is, in the tube containers 1 and 1A of each embodiment, if at least the side edge portions 10a of the laminated film 10 are joined by the adhesive member 13 in the joining region C1, they can be easily disassembled.
The shape of the body portion 2 is not limited to a cylindrical shape, and may be, for example, a triangular columnar shape or a pentagonal or higher polygonal columnar shape.

20 (A) and 20 (B) are perspective views showing a divided structure of the body portion 2 in the modified form.
As shown in FIG. 20 (A), the body portion 2 may be divided into two at equal intervals in the lateral direction (Y direction), and both side edge portions 10a may be joined by the adhesive member 13. Further, as shown in FIG. 20B, the body portion 2 may be diagonally divided in a direction intersecting the longitudinal direction (X direction), and both side edge portions 10a thereof may be joined by the adhesive member 13.

1, 1A Tube container 2 Body 3 Head 4 Sealing part 5 Bottom 10 Laminated film 10a Side edge 13 Adhesive member 15 Adhesive sheet 31 Mouth 32 Shoulder C1 to C4 Joint area

Claims (5)

After the tubular body made of laminated film, the head joined to one end of the body and having a mouth and shoulders, and the other end of the body contain the contents. A tube container including a planned sealing portion to be sealed.
The body portion is joined so that the outermost layer and the innermost layer of both side edges of the laminated film are overlapped with each other via an adhesive member.
The adhesive member has a plurality of concave shapes evenly formed on both sides thereof.
The average value of the diameters of the concave openings opened in the first surface is set to ^Dave _1, and the concave openings opened in the second surface opposite to the first surface. When the average value of the diameter is ^Dave ₂ ,
| D ^ave _1- D ^ave ₂ | / D ^ave ₂ ≤ 0.5
Tube container that meets the relationship. In the tube container according to claim 1,
A tube container in which a joint between the body portion and the head portion is formed via the adhesive member. In the tube container according to claim 1 or 2.
A tube container in which the sealing of the other end of the body is formed via the adhesive member. In the tube container according to any one of claims 1 to 3,
A tube container in which a heat seal layer is not formed on at least one surface side of the laminated film constituting the body portion. A tube container in which the contents are contained in the tube container according to any one of claims 1 to 4, and the other end of the body portion is sealed.