JPH10105064A - Thermosensitive label and container with label - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a thermosensitive label which is easy to mount and has a thermal insulating characteristic and a container with the label by providing the inside surface side of a label base material with a resin layer contg. particles to be expanded by heating. SOLUTION: The inside surface side of the label base material 1 is provided with the thermosensitive adhesive layer 4. The label base material 1 is wound around the container via the thermosensitive adhesive layer 4 and the other end is superposed on the upper side of the one end of the label base material 1, by which the label is mounted at the container. The inside surface side at the time of mounting of the label base material 1 is provided with the resin layer 2 contg. the particles to be expanded by heating. Foamable ink mixed with the particles having the nature to expand when heated to a prescribed temp. or above is applied on the foamable resin layer 2 disposed on one surface side of the label base material 1, by which the label is formed. Further, the foamable resin layer 2 is disposed over approximately the entire surface of the rear surface of the label base material 1 exclusive of the upper and lower ends when the label base material 1 is mounted at the container and the end on the side to be superposed on the upper side when the label base material is wound around the container.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved heat-sensitive label and a container with a label which can be adhered to a container by a heat-sensitive adhesive and have a heat insulating effect.

[0002]

2. Description of the Related Art Generally, a label made of a label substrate made of a synthetic resin film is attached to the body of a container such as a beverage can to apply characters, designs, and the like. That is, the label substrate provided with the adhesive layer on the back side is wound around a container,
The label base material is mounted by polymerizing both end portions.

[0003]

However, in general, beverages are often drunk in either a hot beverage or a cold beverage at the time of beverage, and in such a case, the outside of the can becomes hot or cold. There is a problem that it is difficult to directly hold with bare hands or the like.

[0004] For this reason, it is conceivable to attach a heat insulating material or the like that does not transmit internal heat to the outer surface of the container. However, when such a heat insulating material is attached, the material cost is increased, and the mounting operation is complicated. It was difficult to realize.

An object of the present invention is to provide a heat-sensitive label and a labeled container which can be easily mounted and have heat insulating properties.

[0006]

Means for Solving the Problems The present invention has been made as a thermosensitive label and a container with a label in order to solve such problems, and the means as a thermosensitive label includes a thermosensitive label on the inner surface side of the label substrate 1. The label base material 1 is wound around the container 7 via the heat-sensitive adhesive layer 4, and the other end part 1b is polymerized above the one end part 1a of the label base material 1. In the heat-sensitive label to be mounted on the container 7, the resin layer 2 containing particles that expands due to heating is provided on the inner surface of the label substrate 1 when the label substrate 1 is mounted.

As another means, the label substrate 1
Is not provided with the resin layer 2 at the other end 1b. Another means is that the particles contained in the resin layer 2 are particles that expand at the activation temperature of the heat-sensitive adhesive layer 4.

Another means is that the particles contained in the resin layer 2 expand at a temperature higher than the activation temperature of the heat-sensitive adhesive layer 4.

Further, as a feature of a container with a label, a heat-sensitive label 10 having a heat-sensitive adhesive layer 4 provided on the inner surface side of a label substrate 1 is wound around a container 7 and one end 10a of the heat-sensitive label 10 is provided. In a labeled container, the other end 10b of which is superimposed and mounted on the upper surface of
1 Resin layer containing particles that expand on heating on the inner surface side 2
Is provided except for the upper and lower ends and the other end 10b of the label substrate 1.

As described above, in the present invention, the label substrate 1 is provided with the heat-sensitive adhesive layer 4 on the inner surface side, and the label substrate 1 is wound around the container 7 via the heat-sensitive adhesive layer 4. In a heat-sensitive label which is mounted on the container 7 by superimposing the other end 1b on the upper surface of the one end 1a of the label substrate 1, the inner surface of the label substrate 1 when mounted on the container 7 is heated by heating. Since the resin layer 2 containing the expanding particles is provided, the resin layer 2
By heating 2 to expand the particles, the resin layer 2 foams and can easily provide a heat insulating function.

Further, since the label substrate 1 is provided with the heat-sensitive adhesive layer 4, it is only necessary to activate the label substrate 1 when it is mounted on the container 7 to generate adhesiveness. The mounting work is also easy. Further, since the resin layer 2 can be expanded at any time as needed,
When the resin layer 2 is not expanded, it is compact.

In a configuration in which the resin layer 2 is not provided on the other end 1b of the label base material 1, when the heat sensitive label is wound around the container 7 and the resin layer 2 is expanded, both ends 1a , 1b, the resin layer 2 is not exposed and the appearance is not impaired. Further, since the resin layer 2 does not exist between the two end portions 1a and 1b on the end surface of the other end portion 1b, the overlapped portion of the label base material 1 is not easily peeled off by the resin layer 2.

Further, when the particles contained in the resin layer 2 are particles which expand at the activation temperature of the heat-sensitive adhesive layer 4, the resin layer 2 is formed simultaneously with the activation of the heat-sensitive adhesive layer 4. It can be expanded and the mounting work can be simplified.

On the other hand, if the particles contained in the resin layer 2 are particles that expand at a temperature higher than the activation temperature of the heat-sensitive adhesive layer 4, the unexpanded heat-sensitive label is attached to the container 7. The heat insulation function can be imparted to the label by expanding the resin layer 2 at any time after the mounting.

In addition, since the resin container 2 containing particles that expand by heating is provided on the inner surface of the label substrate 1 except for the upper and lower ends and the other end 10b of the label substrate 1, the container is provided with a label. When the heat-sensitive label 10 is given heat insulation by expanding the resin layer 2, the upper and lower ends of the container 7 and the heat-sensitive label
A labeled container having a good appearance and having a heat insulating function without exposing the expanded resin layer 2 from the polymerized portion 10 is obtained.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. First Embodiment First, a configuration of a cylindrical label according to a first embodiment will be described. In FIG. 1, reference numeral 1 denotes a label substrate made of a synthetic resin film and having a thickness of about 20 to 100 μm. The label substrate 1 is preferably a biaxially stretched polyester film, a biaxially stretched polypropylene film, or the like. Any film suitable for the use, such as a single film made of a known material such as vinyl chloride, polystyrene or polyethylene, or a laminated film of various materials can be used.

When the mounting portion of the object to be mounted such as a container to be mounted has a curved surface or unevenness, a film having heat shrinkability may be used.

On one side of the label substrate 1, a display printing layer on which characters and pictures are applied by a known printing method such as gravure printing, flexo printing, screen printing, letterpress rotary printing or the like.
A printing layer 3 including a white printing layer 3b provided with white ink is formed on substantially the entire surface of the display printing layer 3a.

Reference numeral 2 denotes a foamed resin layer provided on one side of the label substrate 1. The foamed resin layer 2 contains particles having a property of expanding when heated to a predetermined temperature or higher. It is formed by applying foaming ink.

As the particles, hollow microcapsules or the like which expand when heated are suitable. The microcapsules are preferably those in which a low boiling liquefied gas such as isobutane is encapsulated in a thermoplastic resin capsule. The size of the capsule is about 2 to 20 μm, and it is preferable that such a microcapsule is mixed in the foamed resin layer 2 at about 1 to 30% by weight, for example. The thickness of the foamed resin layer 2 is about 10 to 50 μm at the time of application, and 100 to 100 μm at the time of expansion.
It is provided so as to be 1000 μm.

The foamed resin layer 2 is formed on the back surface of the label substrate 1 except for the upper and lower ends when the label substrate 1 is mounted on a container and the end on the side where the label substrate 1 is polymerized upward when wound around the container. Is provided on almost the entire surface of the.

Reference numeral 4 denotes a heat-sensitive adhesive layer provided on the surface of the foamed resin layer 2. The heat-sensitive adhesive layer 4 may be formed of, for example, a delayed tack adhesive or a hot melt adhesive after cooling. It is appropriately used in consideration of the material and the like of the container to be mounted from the solidified heat-sensitive adhesive. Also, the heat-sensitive adhesive layer 4 has a thickness of about 5 to 30 μm,
It is provided on substantially the entire surface of the foamed resin layer 2.

Next, a case where the heat-sensitive label 10 having the above configuration is mounted on the container 7 will be described. The container 7 is a cylindrical beverage-containing can body as shown in FIG. 2, and the upper and lower portions 7a, 7b of the container 7 are reduced in diameter so that the diameter is reduced, and the upper and lower portions 7a, 7b are curved. Is formed.

First, the heat-sensitive adhesive layer 4 provided on the label substrate 1 is activated by heating to a predetermined temperature.
At this time, the microcapsules contained in the foamed resin layer 2 expand at a temperature at which the heat-sensitive adhesive layer 4 is activated, so that the foamed resin layer 2 becomes a foamed layer, and the heat-sensitive adhesive layer 4 has an adhesive property. Simultaneously, the foamed resin layer 4 has a heat insulating effect.

Then, one end 1a of the label substrate 1 in which the heat-sensitive adhesive layer 2 is activated is attached to the surface of the container 7, and the label substrate 1 is wound around the body of the container 7, and The other end 1b of the label substrate 1 is adhered to the upper surface of the one end 1a, and the thermosensitive label 10 is mounted on the container. At this time, as shown in FIG. 3, the foamed resin layer 2 is not provided at the other end 1b of the overlapped portion 6 of the label base material 1 which is superimposed on the one end 1a. Does not protrude from the space between the two end portions 1a and 1b to the outer surface, and the appearance is not impaired.

Although the foaming of the foamed resin layer 2 reduces the adhesiveness between the label substrate 1 and the resin layer 2, the foamed resin layer 2 is not provided at the end of the label substrate 1. In the portions 1a and 1b, the end of the label substrate 1 can be prevented from peeling off.

When the label substrate 1 is formed from a heat-shrinkable film, the heat-shrinkable film is thereafter subjected to heat-shrinkage, so as to be in close contact with the curved surfaces of the upper and lower portions 7a and 7b of the container 7 as shown in FIG. A thermal label 10 can be attached.

Further, since the foamed resin layer 2 is not provided at the upper and lower ends of the label substrate 1, the foamed resin layer 2 does not protrude from the upper and lower portions 7 a and 7 b of the container 7. Also in the upper and lower parts 7a and 7b, the foaming of the foamed resin layer 2 reduces the adhesiveness to the label base material 1 and can prevent the label base material 1 from being turned up from the upper and lower ends.

The label-equipped container 11 having the heat-sensitive label 10 attached thereto is, for example, provided with a beverage of 60 to 80 °.
Even when heated to about C, since the foamed resin layer 2 of the thermal label 10 has a heat insulating effect, the body of the container 7 to which the thermal label 10 is attached can be gripped or used without any trouble. It can also have a heat retaining effect.

Further, since the white print layer 3b is provided on substantially the entire back surface of the display print layer 3a, the surface of the foamed resin layer 2 and the container 7 are visually impaired from the outer surface of the heat-sensitive label 10 to impair the appearance. And characters and pictures on the display print layer 3a can be clearly displayed. However, in addition to the white printed layer 3b, a similar effect can be obtained if a shielding layer such as a colored printed layer or an aluminum vapor-deposited layer is formed, that is, the label substrate 1 is made opaque and the lower surface cannot be seen through. Can be

Second Embodiment Next, a second embodiment will be described. First, the heat-sensitive label 10 of the present embodiment is a label substrate 1 made of the same synthetic resin film as the label substrate 1 of the first embodiment, and is provided on the inner surface side of the label substrate 1. The printing layer 3, the foamed resin layer 2, and the heat-sensitive adhesive layer 4 are formed in the same manner as in the first embodiment.

Microcapsules which expand at a temperature higher than the temperature at which the heat-sensitive adhesive layer 4 is activated are mixed with the foamed resin layer 2.

The foamed resin layer 2 has the positions corresponding to the upper and lower ends when it is mounted on the container 7 as in the first embodiment, and the label base material 1 is wound around the container 7 so that both ends are formed. It is provided on substantially the entire back surface of the label substrate 1, except for an end 1b which is superposed on the superposed portion where the superposed 1a and 1b are superposed.

The thermal label 10 having such a configuration is
First, the heat-sensitive adhesive layer 4 is heated to a predetermined temperature to activate the heat-sensitive adhesive layer 4, and one end 1 a is fixed to the outer surface of the container 7.
Is wound around the container 7, and at this time, the heat-sensitive adhesive 4 is activated at a temperature at which the heat-sensitive adhesive 4 is securely activated but the microcapsules in the foamed resin layer 2 do not expand. Therefore, when the thermal label 10 is attached to the container 7, the thermal label is attached to the container 7 while the foamed resin layer 2 is not foamed.
10 is installed.

As described above, the labeled container 11 in a state where the foamed resin layer 2 is not expanded is convenient for transportation and storage because the foamed resin layer 2 is not bulky because it is not foamed.

Further, such a labeled container 11 is
For example, when the beverage inside is heated or sterilized by heating to a temperature at which the microcapsules in the foamed resin layer 2 expand, the beverage is heated and sterilized, and at the same time, the heat-sensitive label 10 is given a heat insulating function. can do.

Other Embodiments In the above embodiment, the heat-sensitive adhesive layer 4 is provided on substantially the entire back surface of the label substrate 1. However, the heat-sensitive adhesive layer 4 may be, for example, linear or It may be provided in the form of a dot or the like, or may be provided partially.

In the above embodiment, the foamed resin layer 2
The label base material is removed except for the positions corresponding to the upper and lower ends when the label base material 1 is mounted on the container 7 and the end portion 1b of the winding end portions 1a and 1b of the label base material 1 which is superimposed on the upper side. 1, the position where the foamed resin layer 2 is provided is not limited to this. For example, the resin layer 2 is provided only on a part of the label substrate 1 and the part is expanded. It may be formed as a thermal label 10 having a different design.

Furthermore, in each of the above embodiments, a beverage can filled with a beverage and a can lid is used as the container 7 to which the thermal label 10 is attached. However, an empty can before filling the beverage may be used. The type of is not limited to this, as long as it is a container that can be fitted with a thermal label
A synthetic resin container or a glass container can be used as appropriate.

Further, in each of the above embodiments, microcapsules in which a low boiling point liquefied gas such as isobutane is encapsulated in a thermoplastic resin capsule are used for the foamed resin layer 2. The present invention is not limited to the embodiment, and other examples include a capsule made of a synthetic resin or the like, in which sodium bicarbonate, ammonium carbonate, or the like is sealed.
It can be appropriately selected and used from ordinary heat-expandable particles. Further, the particle diameter, the mixing ratio, and the like can be arbitrarily changed according to the application.

Furthermore, in each of the above embodiments, the printing layer 3 is provided only on one side of the label substrate 1, but the printing layer 3 may be provided on both sides of the label substrate 1.

[0042]

As described above, according to the present invention, a heat-sensitive label having heat insulating property can be easily and reliably mounted on a container by a foamed resin layer, and the heat-sensitive label can be mounted on the container with a good appearance. can do.

Further, since the heat insulating property can be maintained by foaming at any time, the label or the container with the label can be stored and transported in a compact state.

[Brief description of the drawings]

FIG. 1 is a partially enlarged sectional view showing a thermal label of the present invention.

FIG. 2 is a front view showing the labeled container of the present invention.

FIG. 3 is a sectional view taken along line XX of FIG. 2;

FIG. 4 is a sectional view taken along line YY of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Label base material 2 Resin layer 3 Printing layer 4 Heat-sensitive adhesive layer

Claims (5)

[Claims] A heat-sensitive adhesive layer (4) is provided on the inner side of a label substrate (1), and the label substrate (1) is placed in a container (7) via the heat-sensitive adhesive layer (4). ) And wrap the label substrate
The other end (1b) is superimposed on one end (1a) of (1) and the container is
(7) In the thermal label to be mounted on, the label substrate
(1) A heat-sensitive label comprising a resin layer (2) containing particles that expand by heating on the inner surface side when the label is mounted. 2. The heat-sensitive label according to claim 1, wherein the other end (1b) of the label substrate (1) is not provided with the resin layer (2). 3. The heat-sensitive label according to claim 1, wherein the particles contained in the resin layer (2) are particles that expand at the activation temperature of the heat-sensitive adhesive layer (4). 4. The heat-sensitive label according to claim 1, wherein the particles contained in the resin layer (2) are particles that expand at a temperature higher than the activation temperature of the heat-sensitive adhesive layer (4). 5. A heat-sensitive label (10) provided with a heat-sensitive adhesive layer (4) on the inner surface side of a label substrate (1) is wound around a container (7), and the heat-sensitive label (10) is In a labeled container in which the other end (1b) is superimposed and mounted on the upper surface of one end (1a), a resin layer (2) containing particles which expand on heating on the inner surface side of the label base material (1) Is provided except for the upper and lower ends and the other end (1b) of the label substrate (1).