JP2006240697A - Heat-shrinkable cylindrical label and method for mounting heat-shrinkable cylindrical label - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat-shrinkable cylindrical label which is provided with a nonwoven fabric on its inner face, and can prevent idle turning to a container when it is mounted on the container from occurring. <P>SOLUTION: In the heat-shrinkable cylindrical label, a label base material 5 in which a heat-insulating layer 8 formed into a sheet by entangling fibers overlies the inner face side of a heat-shrinkable film layer 6 is formed into a cylinder by using the heat-insulating layer inside, and an expanding layer 7 comprising a foamable ink is provided on the inner face side or on the outer face side of the heat-insulating layer 8 so as to be mountable by outer fitting on a cylindrical barrel of the container. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a heat-shrinkable cylindrical label provided with a heat-insulating layer such as a nonwoven fabric, and a mounting method of the heat-shrinkable cylindrical label.

As a container for filling beverages such as coffee, tea, and tea, a bottle-shaped container is known in which a screw cap that can be attached and detached by rotating is attached to the top of a cylindrical body. Such bottle containers have been supplied in large quantities in recent years because the spout can be resealed by a screw cap, so that it is not necessary to drink a beverage at a time and is excellent in portability.
By the way, as a sales form of a filling container in which a beverage is filled in this bottle container, it is carried out by selling in a heating thermostat (hot warmer) or the like. However, since the filling container taken out from the hot warmer is usually about 50 to 60 ° C., it feels hot when it is held. In particular, when the bottle container is made of metal, it feels hotter than a synthetic resin container such as a PET bottle or a glass container. In view of such points, Japanese Patent Application Laid-Open No. 2003-246354 uses a heat-shrinkable cylindrical label in which a nonwoven fabric is laminated on the inner surface of a heat-shrinkable film as a cylindrical label to be attached to the body of a bottle container. It is disclosed.
When a container with a label on which such a nonwoven fabric is laminated holds the container body from above the label with one hand, the heat is blocked by the nonwoven fabric layer so that the heat of the filling is not easily transmitted to the hand. When eating and drinking, the screw cap is rotated with the other hand to open it.

  However, the labeled container having the nonwoven fabric layer on the inner surface has a problem that it is difficult to open the screw cap. In particular, such a problem is remarkable when it is mounted on a cylindrical body portion in which irregularities such as ribs are not formed. This problem is that the nonwoven fabric layer on the inner surface of the label and the body of the container are idle, i.e., the screw itself is rotated along the inner surface of the nonwoven fabric layer when the screw cap is rotated. The cause is to slip. In this regard, the above Japanese Patent Application Laid-Open No. 2003-246354 describes an example of a suitable non-woven fabric for laminating a non-woven fabric on a film by wet laminating or imparting heat insulation properties, but the problem that the cylindrical label is idled. No point or solution is disclosed or suggested.

JP-A-2003-246354 [0005], [0018], [0040] and FIG.

  Then, this invention makes it a subject to provide the heat-shrinkable cylindrical label which is hard to idle | slow with respect to a container, after mounting | wearing with a container. The present invention also provides a second method for mounting a heat-shrinkable cylindrical label that can form a non-slip portion that prevents the label from slipping when the heat-shrinkable cylindrical label is mounted on a container. Let it be an issue.

  The first means of the present invention is that a label base material in which a heat insulating layer formed in a sheet shape with fibers entangled is laminated on the inner surface side of a heat-shrinkable film layer is formed into a cylindrical shape with the heat insulating layer inside. A heat-shrinkable cylindrical label that is formed and is heat-shrinkable cylindrical label that can be externally fitted to the cylindrical body portion of the container, and has an expansion layer provided on the inner surface side or outer surface side of the heat insulating layer. I will provide a.

The heat-shrinkable cylindrical label in which the expansion layer is provided on the inner surface side of the heat insulation layer is expanded under a predetermined condition, whereby an expanded expansion layer is formed on the inner surface of the heat insulation layer. The heat-shrinkable cylindrical label having such an intumescent layer increases the contact area with the container due to the expansion of the intumescent layer between the heat-shrinkable film layer and the container surface. Adhere to press.
Therefore, the heat-shrinkable cylindrical label of the present invention is less likely to idle with respect to the container as compared with the conventional cylindrical label in which the entire surface of the container contact surface is constituted by a nonwoven fabric layer.
In addition, the heat-shrinkable cylindrical label in which the expansion layer is provided on the outer surface side of the heat insulation layer is such that the expansion layer expands between the heat-shrinkable film layer and the container surface, so that the heat insulation layer is placed on the container surface. Will be pressed. For this reason, it becomes difficult to idle | slow compared with the past.
Further, when the expansion layer enters a gap existing between the fibers of the heat insulating layer, the expansion layer is exposed to and contacted with the container surface side by expansion, and thus the heat-shrinkable cylindrical label is difficult to slide with respect to the container. .

Moreover, in a preferable aspect of the present invention, there is provided the above heat-shrinkable cylindrical label including an expandable layer that is in an unexpanded state and includes a foamable ink that can be foamed at the heat shrink temperature of the film layer.
Here, the heat shrink temperature of the film layer refers to a temperature at which the film layer can be heat shrunk so that the heat-shrinkable cylindrical label can be attached to the container, and is generally a temperature of about 80 ° C. to 100 ° C., for example. .

In such a heat-shrinkable cylindrical label, since the inflated layer is not inflated, it is possible to prevent poor insertion when the outer layer is inserted into the container as compared with the case where the inflated layer is inflated.
Further, since the expansion layer contains a foamable ink that can foam at the heat shrink temperature of the film layer, the heat shrinkable cylindrical label is heated by being heated to a predetermined temperature after being inserted into the container. The expansion layer expands as it contracts.
Therefore, the expansion layer expands between the heat-shrinkable film layer and the container surface, so that the expansion layer or the heat insulating layer is in close contact with the container surface, and the contact area with the container increases. It is possible to obtain a container with a cylindrical label in which the cylindrical label is difficult to idle with respect to the container.

  Further, according to the second means of the present invention, a heat insulating layer formed in a sheet shape in which fibers are intertwined is laminated on the inner surface side of the heat-shrinkable film layer, and the inner surface side or outer surface side of the heat insulating layer is not yet formed. The heat-shrinkable cylindrical label provided with the expansion layer is inserted into a container, and this is heated to heat-shrink the heat-shrinkable cylindrical label and expand the unexpanded layer. Provided is a method for mounting a heat-shrinkable cylindrical label that forms a non-slip portion on a container contact surface.

According to the above mounting method, since the non-slip portion is formed on the container contact surface of the heat-shrinkable cylindrical label by inflating the unexpanded layer, the cylindrical label is less likely to idle with respect to the container. An attached container can be obtained.
Such a mounting method allows the heat-shrinkable cylindrical label to be satisfactorily inserted into the container. In addition, since the unexpanded layer is expanded by heating or the like for heat-shrinking the heat-shrinkable cylindrical label, it is possible to simultaneously attach the cylindrical label and form the anti-slip portion.

Since the heat-shrinkable cylindrical label according to the present invention is provided with a heat insulating layer, the temperature of the filling is hardly transmitted to the handle even when the labeled container with the cylindrical label is heated.
Furthermore, the heat-shrinkable cylindrical label according to the present invention is difficult to slide with respect to the container due to the expanded layer after being attached to the cylindrical body of the container, and thus the screw cap can be easily opened. A container with a label can be provided.
Moreover, the mounting method of the heat-shrinkable cylindrical label which concerns on this invention is a container with a cylindrical label which can be favorably inserted in a container, and a cylindrical label does not slip easily with respect to a container by heating a cylindrical label. Can be easily manufactured.

Hereinafter, the present invention will be specifically described with reference to the drawings.
1 to 3, reference numeral 1 denotes a container with a cylindrical label in which a heat-shrinkable cylindrical label 3 having a heat insulating layer 8 and an expansion layer 7 is shrink-mounted on at least a body portion 22 of the container 2.
As shown in FIG. 2, the container 2 is formed with a cylindrical body portion 22 and a spout 24, and a sealing screw cap 25 is attached to the spout 24. Specifically, the container 2 has a bottom surface portion 21, a hollow body portion 22 following the bottom surface portion 21, a shoulder portion 23 gradually narrowing from the body portion 22, and a spout 24 formed above the shoulder portion 23. Yes. The body portion 22 of the container 2 is formed in a substantially cylindrical shape, and the outer surface of the body portion 22 is a smooth surface on which irregularities such as ribs are not formed. Further, the spout 24 includes a substantially cylindrical peripheral wall portion 241 having a male screw portion formed on the outer surface, and an opening portion 242 formed at the upper end of the peripheral wall portion 241, and the central axis O of the opening portion 242 is It is formed so as to coincide with the central axis of the body portion 22. The screw cap 25 includes a sealing portion 251 that closes the opening 242 and a peripheral wall portion 252 that extends downward from the periphery of the sealing portion 251, and is formed on the inner peripheral surface of the peripheral wall portion 252 with a male screw portion of the spout 24. A female screw portion (not shown) to be screwed is formed. Therefore, when the screw cap 25 is rotated around the central axis O, the screw cap 25 can be removed from the spout 24.

The material of the container 2 is not particularly limited, such as a metal made of aluminum, steel (including an aluminum plate or a steel plate on which a synthetic resin film is laminated), a synthetic resin made of polyethylene terephthalate, glass, or the like. It can be formed of a known material. Among them, since the heat of the packing is easily transmitted and the label is relatively slippery, for example, it is made of metal such as aluminum or steel bottle-shaped cans laminated with a polyethylene terephthalate film (including resin coating) on the surface. It is effective to attach the cylindrical label 3 of the present invention to the container 2. The material of the screw cap 25 may be the same type as that of the container 2 (for example, metal, synthetic resin, etc.), or may be a different material.
The diameter of the trunk | drum 22 and the screw cap 25 is not specifically limited, For example, the diameter of the trunk | drum 22 is about 30-80 mm, and the diameter of the sealing part 251 of the screw cap 25 is about 20-40 mm. . However, if the diameter of the screw cap 25 is large, it is rotated by a relatively large force when it is opened, and the cylindrical label 3 attached with the larger diameter screw cap 25 tends to run idle. As described above, it is particularly effective to attach the cylindrical label 3 of the present invention to the container 2 having the screw cap 25 having a diameter of 38 mm or more.

The heat-shrinkable cylindrical label 3 has both end portions 5a and 5b of the label base material 5 in which the heat-insulating layer 8 is provided on the inner surface of the heat-shrinkable film layer 6 and the expansion layer 7 is provided on the inner surface of the heat-insulating layer 8. Is formed into a cylindrical shape, and the overlapped portion is bonded with a solvent or an adhesive to form a cylindrical body in which the center seal portion 4 is formed. ing.
As shown in FIG. 3B, the label base material 5 is formed in a rectangular shape having a predetermined length that can be covered from the body portion 22 to the shoulder portion 23 of the container 2, for example. It consists of the laminated film provided in order of the layer 6, the design printing layer (not shown), the adhesive bond layer (not shown), the heat insulation layer 8, and the expansion layer 7.
Specifically, the inner surface of the film layer 6 is used as a bonding margin for forming the center seal portion 4 on the inner surface of the one side end portion 5a on the inner surface of the other side end portion 5b. Has a predetermined width (for example, about 3 to 8 mm), and a sticking portion 5c exposed in a vertical belt shape is secured. A design printing layer is provided on the entire inner surface of the film layer 6 except for the sticking portion 5c, and a heat insulating layer 8 is laminated on the entire inner surface of the design printing layer via an adhesive layer. Are stacked.
The design print layer is not limited to being provided on the inner surface of the film layer 6, and can be provided on the outer surface of the film layer 6.

  The film layer 6 is a colorless transparent or colored transparent heat-shrinkable film that can be seen through the design printing layer, and the material thereof is not particularly limited. For example, a polyester resin such as polyethylene terephthalate or an olefin resin such as polypropylene. Examples thereof include films made of styrene resins such as styrene-butadiene copolymers, one kind selected from thermoplastic resins such as cyclic olefin resins and vinyl chloride resins, or a mixture of two or more kinds, among others. In order to pull the heat insulation layer 8 and the like to shrink, it is preferable to use a polyester resin film having a relatively strong shrinkage force. Moreover, you may be comprised with the laminated | multilayer film which laminated | stacked two or more types of different films. A heat-shrinkable film can be obtained by forming a film by a known production method and stretching the film. The stretching treatment is usually at a temperature of about 70 to 110 ° C., and is 2.0 to 8.0 times, preferably 3.0 in the width direction (in the case of the cylindrical label 3, the circumferential direction; hereinafter referred to as the circumferential direction). It is performed by stretching about 7.0 times. Further, in the longitudinal direction (the longitudinal direction when the label 3 is used, hereinafter referred to as the longitudinal direction), for example, the stretching process may be performed at a low magnification of 1.5 times or less. The obtained film becomes a uniaxially stretched film or a biaxially stretched film slightly stretched in a direction orthogonal to the main stretch direction. The film layer 6 preferably has a thickness of about 20 to 60 μm.

The film layer 6 has a thermal shrinkage rate in the circumferential direction of about 20 to 80% when immersed in warm water of 85 ° C. for 10 seconds, for example. Moreover, the thermal contraction rate in the vertical direction is exemplified by about -3 to 10%.
However, heat shrinkage rate (%) = [{(original length in circumferential direction (or longitudinal direction)) − (length after immersion in circumferential direction (or longitudinal direction))} / (circumferential direction (or longitudinal direction) ) Original length)] × 100.

Further, the film layer 6 preferably has a strong clamping force to the container after heat shrinkage. For example, the film layer 6 preferably has a circumferential shrinkage stress of 3 MPa or more. Is more preferably 5 MPa or more. Examples of such films include polyester resin films such as polyethylene terephthalate films. By using the film layer 6 having such a shrinkage stress, the cylindrical label 3 strongly adheres to the container 2 even after being mounted, so that the idling of the cylindrical label 3 can be more reliably prevented.
The shrinkage stress referred to in this specification means that the film is cut to 80 mm in the circumferential direction and 15 mm in the longitudinal direction, and both ends in the circumferential direction are stress measuring devices (trade name: Autograph, manufactured by Shimadzu Corporation). This is the shrinkage stress after being held on a chuck (distance between chucks: 50 mm), immersed in warm water at 85 ° C. for 10 seconds, and left at room temperature for 3 minutes.

The design printing layer is provided with display printing such as a predetermined display such as a trade name, a pattern, and description, and solid printing such as white, etc. in a single color or multicolor printing by gravure printing or the like.
The adhesive layer is not particularly limited as long as it is an adhesive capable of adhering the heat insulating layer 8 and the film layer 6 (design printing layer), and is an adhesive that is used in an ordinary dry laminating method or wet laminating method. For example, solvent-based adhesives such as acrylic, polyurethane, vinyl acetate, vinyl chloride, rubber, or water-soluble adhesives can be used.

The heat insulation layer 8 is not particularly limited as long as a plurality of fibers are entangled with each other and formed into a sheet shape and has a portion capable of holding air. For example, various nonwoven fabrics, Japanese paper, and the like can be used.
As the nonwoven fabric, for example, fibers such as polyolefins such as polyester, polyethylene, and polypropylene, polyolefin elastomers, rayon, nylon, and cupra were produced in a sheet shape by an adhesion method, a needle punch method, a spun bond method, a melt blow method, and the like. Nonwoven fabric can be used. As the fibers constituting the nonwoven fabric, solid fibers, hollow fibers, or mixed fibers thereof can be used, and it is preferable to use hollow fibers or mixed fibers thereof because they are more excellent in heat insulation. The fiber length is preferably a long-fiber non-woven sheet in terms of strength due to a three-dimensional network structure formed by entanglement of fibers and the handleability of the sheet, and a short-fiber non-woven fabric is preferable in terms of sheet cutting suitability. Physical properties of the nonwoven fabric, for example, basis weight of about 10 to 50 g / m ^2, preferably 15 to 30 g / m ^2, the degree being preferred. This is because if the basis weight is too small, it may be broken at the time of processing. On the other hand, if the basis weight is too large, the film layer 6 does not sufficiently follow and shrink as the film shrinks.
Moreover, in order to ensure sufficient heat insulation of the heat insulation layer 8, the thickness of the nonwoven fabric is preferably about 80 to 200 μm, and the denier is preferably about 2 to 5 d. Specific examples of such non-woven fabric include “Marix” manufactured by Unitika Ltd., “Bonden” manufactured by Toyobo Co., Ltd., “Ecule”, “Unicel” manufactured by Unicel Corporation.

Japanese paper is made from natural bast long fibers such as Kozo, Mitsumata, Ganpi, and other traditional Japanese paper that has been hand-made by adding berries to hemp and kenaf. , Paper (broadly-defined Japanese paper) obtained by mechanically dispersing various long fiber materials such as rayon, wood pulp, and synthetic fiber.
Japanese paper having a basis weight of 10 to 40 g / m ² , preferably 10 to 20 g / m ² is used. If the basis weight is too small, it may be broken during processing. On the other hand, if the basis weight is too large, the film layer 6 does not sufficiently follow and contract with heat shrinkage.

  In addition, you may laminate | stack the colored heat insulation layer 8 by coloring materials, such as the said nonwoven fabric and Japanese paper. The color of the colored heat insulating layer 8 is preferably one that is integrated with the design printing layer, for example, the same color as the solid printing of the design printing layer, or the same color as the outer surface of the container 2. Is exemplified. By using such a colored heat insulating layer 8, the upper and lower edges of the heat insulating layer 8 can be made inconspicuous in the cylindrical label 3 in the mounted state. That is, when the cylindrical label 3 is attached to the container, the film layer 6 is slightly shrunk in the vertical direction and shifted so as to slide vertically, so that the upper and lower edges of the heat insulating layer 8 look out at the upper and lower edges of the label. Although there is a possibility, by using the colored heat insulating layer 8, even if the upper and lower edges of the heat insulating layer 8 come out, it can be visually disguised so as to be melted into the outer surface of the design printing layer or the container. Will not be damaged.

Next, the inflatable layer 7 is not particularly limited as long as it can be inflated. In particular, it is preferable to use a material that expands the outer surface of the container 2 and the sliding resistance as compared with that before expansion. . The expansion layer 7 can be formed, for example, by applying a foamable ink that can expand and expand. When using a heat-foaming material, a foaming temperature of about 70 to 200 ° C. can be used. In particular, a foamable ink (foaming temperature of about 70 to 90 ° C.) that can foam at the heat shrink temperature of the film layer 6 is used. It is preferable to use it.
The heat shrink temperature of the film layer 6 means that the film layer 6 is heated so that the heat-shrinkable cylindrical label 3 can be shrink-mounted on the container 2 (by shrinking the entire label base material by heat shrink of the film layer 6). The temperature that can shrink. Such temperature varies depending on the material of the film layer 6 and the like, but is generally about 80 ° C. to 100 ° C., for example. Note that steam is preferable as the heating condition.

The foamable ink is not particularly limited. For example, foamable ink that foams by heating, for example, vinylidene chloride-acrylonitrile copolymer, polystyrene, polyethylene, polyvinylidene chloride, polyacrylonitrile, polymethyl methacrylate, polyurethane and the like. In a capsule made of a thermoplastic resin such as a copolymer, a microcapsule containing a foaming agent such as a low-boiling liquid expanding agent such as propane, butane, isobutane, pentane, or a thermally decomposable compound such as sodium bicarbonate, Examples thereof include foamable inks obtained by mixing with resin emulsions or aqueous emulsions of thermoplastic resins such as acrylic emulsions, vinyl acetate emulsions, and urethane emulsions. For example, the microcapsules preferably have an average particle diameter of 5 to 30 μm, and preferably expand (foam) about 2 to 70 times when heated to the heat shrink temperature of the film layer 6. The content of the microcapsules in the foamable ink is preferably 30 to 60% by weight in terms of ink solid content. The intumescent layer 7 can be formed by applying the foamable ink at about ² to 10 g / m ² .

The said heat-shrinkable cylindrical label 3 can be obtained by manufacture with the following method, for example, and the obtained cylindrical label 3 can be mounted | worn with the container 2 with the following method.
Hereinafter, although the case where a nonwoven fabric is used as the heat insulation layer 8 is illustrated, it can be performed similarly when using Japanese paper or the like as the heat insulation layer 8.
One side of the nonwoven fabric sheet is coated with foamable ink by gravure printing or the like to prepare a nonwoven fabric sheet provided with an unexpanded expanded layer 7. On the other hand, a design printing layer is provided by gravure printing or the like on the inner surface of the film layer original fabric sheet having a predetermined width, excluding the adhering portion 5c, and an adhesive for adhering the nonwoven fabric using a gravure roll plate or the like is provided thereon. It is applied to provide an adhesive layer, and the other surface of the nonwoven fabric original sheet (the surface on which no foamable ink is applied) is overlaid thereon. Thereby, the label base material continuum in which the unexpanded (foamed) expanded layer 7 is laminated is obtained. The continuum (cut to a predetermined width) is wound into a roll, the base continuum roll is mounted on a bag making apparatus (tubular processing apparatus), and a solvent is passed through the nozzle to the secured adhering portion 5c. Alternatively, the cylindrical label 3 is continuously connected by applying the adhesive and forming the tube in a cylindrical shape by overlaying and sealing the sticking portion 5c on the outer surface of the other end portion of the base material continuous body. A label continuum is obtained. This is flattened and wound into a roll to obtain a label continuum roll, and by cutting this to a predetermined length, the heat-shrinkable cylindrical label 3 is obtained.

  The cylindrical label 3 is externally inserted into the body portion 22 of the container 2, guided to the shrink tunnel, and heated to the heat shrink temperature, whereby the film layer 6 is thermally contracted. By this heat shrinkage, the nonwoven fabric (heat insulating layer 8) is pulled and contracted, and the tubular label 3 comes into close contact with the container 2, whereby the tubular labeled container 1 can be obtained. At this time, since the unexpanded expansion layer 7 is expanded by heat, the contact area between the inner surface of the cylindrical label 3 (the surface of the expansion layer 7) and the body of the container 2 is increased, and the expansion layer 7 The surface is in close contact so as to press the body surface of the container 2. Accordingly, it is possible to obtain a container 1 with a cylindrical label in which the cylindrical label 3 is difficult to idle.

The heat-shrinkable cylindrical label 3 of the present invention is attached to the container 2 as long as the expansion layer 7 is expanded and exposed to the container surface side of the label before being inserted into the container 2. Accordingly, it is possible to obtain the container 1 with the cylindrical label in which the cylindrical label 3 is difficult to idle with respect to the container 2. In this case, the expanded layer 7 that is expanded is flexible and easily deformed. Therefore, when the cylindrical label 3 is shrink-mounted on the container 2, the expanded layer 7 is appropriately deformed and the container on the inner surface of the cylindrical label 3. Since the contact area with 2 increases, the cylindrical label-equipped container 1 in which the cylindrical label 3 is difficult to idle can be obtained.
However, as described above, an attachment method in which the unexpanded tubular label 3 is inserted into the container 2 and then heated to the heat shrink temperature to foam and expand the expansion layer 7 is preferable.
That is, if the expansion layer 7 is expanded before the container is inserted, when the cylindrical label 3 is inserted into the container 2, the expanded layer 7 (foamed foamable ink layer) is expanded into the container body 22. Interference with the cylindrical label 3 is likely to cause an insertion error of the cylindrical label 3. In this regard, when the tubular label 3 in which the intumescent layer 7 is an unexpanded layer is inserted, it can be inserted into the container 2 satisfactorily and is not bulky when stored. Furthermore, since the expandable layer 7 uses a foamable ink that can be foamed at the heat shrink temperature of the film layer 6, when the cylindrical label 3 is inserted into the container 2 and heated to the heat shrink temperature, the film layer 6 Shrinks and the cylindrical label 3 shrinks in diameter, while the expansion layer 7 (unfoamed foamable ink layer) expands and expands simultaneously. Therefore, the surface of the expansion layer 7 is sufficiently adhered to the container 2 to increase the slip resistance with the container 2, and the expansion layer 7 functions as a non-slip portion with respect to the container 2. Therefore, when the user grasps the container 2 from above the cylindrical label 3 and opens the screw cap 25, the cylindrical label 3 becomes difficult to slide with respect to the container 2 due to the presence of the anti-slip portion. .
As described above, according to the mounting method in which the tubular label 3 is inserted into the container 2 and then heated to the heat shrinkage temperature to expand the expansion layer 7, the tubular label 3 is excellent in insertability, and further, the tubular label. 3 and the formation of the anti-slip portion can be performed simultaneously.

In addition, as a means for preventing idling of the cylindrical label 3 with respect to the container, it is conceivable to apply a heat-sensitive adhesive or the like that exerts an adhesive force by heating to the inner surface of the heat insulating layer 8. Since a heat-sensitive adhesive or the like is impregnated into the heat insulating layer 8 such as a nonwoven fabric intertwined with each other, a relatively large amount of heat-sensitive adhesive is required. In this regard, if an expansive material such as a foamable ink is used as in the present invention, even if the expansive material is impregnated in the heat insulating layer 8 during application, it is exposed from the inner surface of the heat insulating layer 8 during expansion. Can be suppressed.
Moreover, since the foamed expansion layer 7 has innumerable bubbles inside and has a heat insulating effect, it has an effect of improving the heat insulating property of the cylindrical label 3 in addition to the anti-slip effect.

Next, modified examples of the above embodiments will be described. In the following, portions different from the above embodiments will be mainly described, description of similar configurations will be omitted, and terms and figure numbers may be used.
(Regarding the formation position of the expansion layer 7)
In the above embodiment, the expansion layer 7 is provided on the inner surface side of the heat insulation layer 8. However, for example, as shown in FIG. 4, the expansion layer 7 may be provided on the outer surface side of the heat insulation layer 8.
In the heat-shrinkable cylindrical label 3, since the heat insulating layer 8 entangled with fibers (slidable with respect to the container) constitutes the container contact surface of the cylindrical label 3, the cylindrical label 3 is smoother. Can be inserted into the container 2.
Moreover, the heat-shrinkable cylindrical label 3 provided with the expansion layer 7 on the outer surface side of the heat insulating layer 8 is pressed and adhered to the container surface by the expansion layer 7 expanded by heating or the like. Furthermore, when the expansion layer 7 enters a gap existing between the fibers of the heat insulating layer 8, the expansion layer 7 is exposed from the inner surface of the heat insulating layer 8 due to expansion, and the contact area with the outer surface of the container 2 increases. As a result, the slip resistance with respect to the container 2 is increased. Accordingly, it is possible to obtain the container 1 with the cylindrical label in which the cylindrical label 3 is difficult to idle with respect to the container 2.

Furthermore, in each said embodiment, although the expansion layer 7 is provided in the inner surface or the whole outer surface of the heat insulation layer 8, the expansion layer 7 may be provided in a part of heat insulation layer 8. FIG.
For example, as shown in FIG. 5 (a), by forming the label base material 5 provided with a non-inflatable portion 9 having no inflatable layer 7 in the longitudinal band shape of the other side end portion 5b, As shown in the figure (b), it can also be set as the heat-shrinkable cylindrical label 3 in which the expansion layer 7 was provided except the part corresponding to the center seal | sticker part 4. FIG. Since the cylindrical label 3 of this modification does not have the expansion layer 7 in the center seal portion 4, the thickness of the center seal portion 4 does not become too thick due to the expansion of the expansion layer 7, which is a preferable mode.

  Further, as shown in FIG. 6 (a), a heat-shrinkable cylindrical label 3 in which a pair of non-inflatable portions 9 that do not have the inflatable layer 7 in the longitudinal direction is opposed to each other in the middle in the circumferential direction. It can also be set as this aspect. Since the non-inflatable portion 9 that does not have the inflating layer 7 is opposed to (opposite at about 180 degrees) and extends in a strip shape in the longitudinal direction in the cylindrical label 3 of this modification, for example, FIG. As shown, the continuous label body in which the cylindrical labels 3 are continuously connected can be folded flat in the non-inflatable portion 9. Such a label continuum is a preferred embodiment because the expansion layer 7 is not located in the folds 10 and 10 and thus the expansion layer 7 in an unexpanded state is cracked or the like, so that cracks of the expandable material do not occur.

Furthermore, as shown to Fig.7 (a) and (b), the aspect of the heat-shrinkable cylindrical label 3 which does not have the expansion layer 7 in an upper-lower end part, ie, the expansion layer 7 was provided only in the middle part of the vertical direction. It can also be transformed into In general, the upper end portion of the cylindrical label is attached to a portion having a small difference in diameter of the container 2 so as to be largely heat-shrinked. As a result, the label thickness is increased. Since the expansion layer 7 is not provided in the portion, it is possible to prevent the upper and lower end portions of the cylindrical label 3 from becoming too thick when the expansion layer 7 is expanded, and to provide the container 1 with a beautiful appearance. In addition, when the user opens the screw cap of the labeled container 1, the user normally holds the middle part in the longitudinal direction of the cylindrical label 3, so that the anti-spinning effect of the cylindrical label 3 does not deteriorate.
Note that, as shown in FIG. 7C, the same effect as described above can be obtained even in the case of the cylindrical label 3 formed so that the inflating layer 7 becomes gradually thinner toward the upper end and / or the lower end. Play.
Moreover, you may comprise the cylindrical label 3 by combining suitably the lamination | stacking position of the expansion layer 7 shown in FIGS. For example, in FIG. 6, the cylindrical label 3 in which the expansion layer 7 is not provided on both the portion corresponding to the center seal portion 4 and the portions corresponding to the folds 10 and 10 is illustrated.

(About intumescent materials)
In each of the above embodiments, the expandable material constituting the expandable layer 7 is exemplified by a foamable ink that expands by heating, but the expandable material used in the present invention is not limited to a thermally expandable material, For example, a polymer absorbent that can be expanded by water can be used as an expandable material, and this can be impregnated on the inner surface or the outer surface of the heat insulating layer 8. Examples of the expandable material include sodium polyacrylate.
Since the cylindrical label 3 provided with the expansion layer 7 of the water-expandable material can be expanded by the heating steam used when the container 2 is shrink mounted, the cylindrical label 3 can be attached and slipped. It is also possible to prevent the stop portion from being formed.

(About heat insulation layer 8)
In each said embodiment, although the heat insulation layer 8 is laminated | stacked on the substantially whole film layer 6 (except for the sticking part 5c), the heat insulation layer 8 is provided only in the longitudinal direction middle part of the film layer 6, for example. The heat insulation layer 8 may be partially provided like the thing which is. The heat-shrinkable cylindrical label 3 does not have to be provided with the expansion layer 7 in a portion that does not have the heat insulation layer 8, but since the expansion layer 7 also has a heat insulation effect, a foamable ink or the like is also formed in this portion. An intumescent layer 7 may be provided.

(About containers to be installed)
The container 1 with a cylindrical label to which the heat-shrinkable cylindrical label 3 of the present invention is attached is not limited to a use that is heated by a hot warmer or the like, and can be used at a cold temperature or at a normal temperature. The filling of 2 is not restricted to foodstuffs, such as a drink.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. However, the present invention is not limited to the following examples.
(Test container 1) An aluminum bottle can having a shape as shown in FIG. Aluminum screw cap diameter 38mm, barrel diameter 66mm, barrel length 86mm, capacity 290ml. Made by Mitsubishi Materials Corporation.
(Test container 2) A steel bottle can having a shape as shown in FIG. 8 and a polyethylene terephthalate film laminated on the outer surface. Steel screw cap diameter 38mm, body diameter 52mm, body length 80mm, capacity 190ml. Made by Toyo Seikan Co., Ltd.
(Test heat-shrinkable film) A heat-shrinkable film made of polyethylene terephthalate having a thickness of 30 μm. 65% heat shrinkage in the circumferential direction at 85 ° C. Shrinkage stress 6 MPa. (All measurement methods are as above)

Example 1
Non-woven fabric (polyethylene terephthalate fiber, basis weight 20 g / m ² , trade name: Bonden, manufactured by Toyobo Co., Ltd., with a grid-like embossment with the total area of the top surface of the protrusions being 75% of the total area) Foamed ink (Daiichi Seika Kogyo Co., Ltd., trade name: L320, foaming temperature: 80 to 85 ° C., so that the coating amount after drying is about 2 g / m ^{2 over} the entire embossed surface of (Including microcapsules having a particle size of 10 to 20 μm). A heat-shrinkable film for testing was laminated on the other surface of the nonwoven fabric by dry lamination, and processed into a cylindrical shape with the expanded layer inside, to produce a cylindrical label.
The tubular label in an unexpanded state was externally inserted into the body portion of the test container 1 and passed through a 90 ° C. steam tunnel for 10 seconds to be shrink-mounted. When the barrel of the obtained container with a cylindrical label was held with one hand and the screw cap was turned with the other hand, the cylindrical label did not idle and the screw cap could be turned. Further, after the screw cap was resealed, the same plug opening test was performed again. As a result, the screw cap could be turned in the same manner. The unsealing test after the resealing was repeated several times, and in all cases, the screw cap could be opened.
Next, when the attached cylindrical label was cut and the expanded layer was observed with a microscope, the microcapsule was foamed to approximately 30 to 50 μm.
Moreover, when the same cylindrical label was shrink-mounted on the body of the test container 2 in the same manner and subjected to the same opening test (including the reopening test), the screw cap could be opened. It was.

Example 2
Foamable ink (manufactured by Dainichi Seika Kogyo Co., Ltd., trade name: M430, foaming temperature) on the entire embossed surface of the same nonwoven fabric as in Example 1 so that the coating amount after drying is about 2 g / m ^2. : 100-105 ° C., containing microcapsules having a particle size of 10-20 μm). This foamable ink is heated with a 120 ° C. heat roller, and the ink is foamed. Then, a heat-shrinkable film for testing is laminated on the other side of the nonwoven fabric with a dry laminate, and a tubular shape with the expanded layer inside. It processed and produced the cylindrical label.
When this cylindrical label was attached to the test containers 1 and 2 in the same manner as in Example 1 and subjected to the opening / reopening test, the screw cap could be opened.
Moreover, when the expansion layer was observed with a microscope, the microcapsules were foamed to approximately 30 to 60 μm.

Example 3
A cylindrical label was produced in the same manner as in Example 1 except that the surface of the test heat-shrinkable film laminated on the dry laminate was the surface side coated with the non-woven foamable ink.
When this cylindrical label was attached to the test containers 1 and 2 in the same manner as in Example 1 and subjected to the opening / reopening test, the screw cap could be opened.

Comparative Example A cylindrical label was prepared in the same manner as in Example 1 except that the foamable ink was not applied, and this was shrink-attached to the test container 1 to prepare a container with a cylindrical label according to the comparative example. did. When this container was subjected to an opening test (including a resealing test) by gripping the body from above the label with the same level of force as in Example 1, the cylindrical label sometimes slipped. Furthermore, when the same cylindrical label was similarly attached to the trunk of the test container 2 and an opening test (including a reopening test) was performed, the cylindrical label sometimes slipped.

The front view which shows the container with a cylindrical label of 1st Embodiment. The exploded perspective view. (A) is the AA line cross-sectional view of FIG. 2, (b) is a front view which shows a label base material. (A) is a cross-sectional view which shows the modification of a heat-shrinkable cylindrical label, (b) is a front view which shows the label base material used for the cylindrical label. (A) is a front view which shows the modification of a label base material, (b) is a cross-sectional view which shows the heat-shrinkable cylindrical label formed with the label base material. (A) is a cross-sectional view showing a modification of the heat-shrinkable cylindrical label, and (b) is a partially omitted perspective view including a cross-section showing a continuous cylindrical label in which the cylindrical label is continuous. (A) is a perspective view showing a modified example of the heat-shrinkable cylindrical label, (b) is a longitudinal sectional view taken along the line B-B, and (c) is a further illustration of the labels (a) and (b). The longitudinal cross-sectional view which shows the modification which becomes. The schematic front view which shows the container for a test used in the Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Container with a cylindrical label, 2 ... Container, 21 ... Bottom part, 22 ... Body part, 23 ... Shoulder part, 24 ... Outlet, 241 ... Peripheral wall part, 242 ... Opening part, 25 ... Screw cap, 251 ... Sealing Part, 252 ... peripheral wall part, 3 ... cylindrical label, 4 ... center seal part, 5 ... label base material, 5a ... one side end part, 5b ... other side end part, 5c ... sticking part, 6 ... film layer, 7 ... expanded layer, 8 ... heat insulating layer, 9 ... non-expanded part, 10 ... fold

Claims (3)

A label base material in which a heat insulating layer formed in the form of a sheet in which fibers are entangled with each other is laminated on the inner surface side of the heat-shrinkable film layer, is formed into a cylindrical shape with the heat insulating layer inside, and a cylinder of a container In a heat-shrinkable cylindrical label that can be externally fitted to the cylindrical body,
A heat-shrinkable cylindrical label, wherein an expansion layer is provided on an inner surface side or an outer surface side of the heat insulating layer.   The heat-shrinkable cylindrical label according to claim 1, wherein the expandable layer is in an unexpanded state, and the expandable layer includes a foamable ink that can be foamed at a heat-shrink temperature of the film layer. A heat-shrinkable structure in which a heat-insulating layer formed in a sheet shape in which fibers are entangled with each other is laminated on the inner surface side of the heat-shrinkable film layer, and an unexpanded layer is provided on the inner surface side or the outer surface side of the heat-insulating layer A cylindrical label is inserted into a container and heated to heat-shrink the heat-shrinkable cylindrical label and expand the unexpanded layer, and a non-slip portion on the container contact surface of the heat-shrinkable cylindrical label A method for mounting a heat-shrinkable cylindrical label, characterized in that is formed.

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